From 25e93c91878b7f8536764b06d2cb72020031acd1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Tue, 18 Feb 2025 09:51:22 +0100
Subject: Cowboy 2.13.0

---
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 docs/en/cowboy/2.12/guide/performance/index.html   |    2 +
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 .../cowboy/2.12/guide/resource_design/index.html   |    2 +
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 docs/en/cowboy/2.12/manual/cowboy/index.html       |    2 +
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 .../manual/cowboy_constraints.nonempty/index.html  |    2 +
 .../2.12/manual/cowboy_constraints/index.html      |    2 +
 .../2.12/manual/cowboy_decompress_h/index.html     |    2 +
 .../manual/cowboy_handler.terminate/index.html     |    2 +
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 docs/en/cowboy/2.12/manual/cowboy_http/index.html  |    2 +
 docs/en/cowboy/2.12/manual/cowboy_http2/index.html |    2 +
 docs/en/cowboy/2.12/manual/cowboy_loop/index.html  |    2 +
 .../cowboy/2.12/manual/cowboy_metrics_h/index.html |    2 +
 .../2.12/manual/cowboy_middleware/index.html       |    2 +
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 .../cowboy/2.12/manual/cowboy_req.cert/index.html  |    2 +
 .../cowboy_req.delete_resp_header/index.html       |    2 +
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 .../manual/cowboy_req.has_resp_header/index.html   |    2 +
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 .../cowboy/2.12/manual/cowboy_req.host/index.html  |    2 +
 .../2.12/manual/cowboy_req.host_info/index.html    |    2 +
 .../2.12/manual/cowboy_req.inform/index.html       |    2 +
 .../manual/cowboy_req.match_cookies/index.html     |    2 +
 .../2.12/manual/cowboy_req.match_qs/index.html     |    2 +
 .../2.12/manual/cowboy_req.method/index.html       |    2 +
 .../manual/cowboy_req.parse_cookies/index.html     |    2 +
 .../2.12/manual/cowboy_req.parse_header/index.html |    2 +
 .../2.12/manual/cowboy_req.parse_qs/index.html     |    2 +
 .../cowboy/2.12/manual/cowboy_req.path/index.html  |    2 +
 .../2.12/manual/cowboy_req.path_info/index.html    |    2 +
 .../cowboy/2.12/manual/cowboy_req.peer/index.html  |    2 +
 .../cowboy/2.12/manual/cowboy_req.port/index.html  |    2 +
 .../cowboy/2.12/manual/cowboy_req.push/index.html  |    2 +
 .../en/cowboy/2.12/manual/cowboy_req.qs/index.html |    2 +
 .../index.html                                     |    2 +
 .../2.12/manual/cowboy_req.read_body/index.html    |    2 +
 .../2.12/manual/cowboy_req.read_part/index.html    |    2 +
 .../manual/cowboy_req.read_part_body/index.html    |    2 +
 .../cowboy_req.read_urlencoded_body/index.html     |    2 +
 .../cowboy/2.12/manual/cowboy_req.reply/index.html |    2 +
 .../2.12/manual/cowboy_req.resp_header/index.html  |    2 +
 .../2.12/manual/cowboy_req.resp_headers/index.html |    2 +
 .../2.12/manual/cowboy_req.scheme/index.html       |    2 +
 .../manual/cowboy_req.set_resp_body/index.html     |    2 +
 .../manual/cowboy_req.set_resp_cookie/index.html   |    2 +
 .../manual/cowboy_req.set_resp_header/index.html   |    2 +
 .../manual/cowboy_req.set_resp_headers/index.html  |    2 +
 .../cowboy/2.12/manual/cowboy_req.sock/index.html  |    2 +
 .../2.12/manual/cowboy_req.stream_body/index.html  |    2 +
 .../manual/cowboy_req.stream_events/index.html     |    2 +
 .../2.12/manual/cowboy_req.stream_reply/index.html |    2 +
 .../manual/cowboy_req.stream_trailers/index.html   |    2 +
 .../cowboy/2.12/manual/cowboy_req.uri/index.html   |    2 +
 .../2.12/manual/cowboy_req.version/index.html      |    2 +
 docs/en/cowboy/2.12/manual/cowboy_req/index.html   |    2 +
 docs/en/cowboy/2.12/manual/cowboy_rest/index.html  |    2 +
 .../2.12/manual/cowboy_router.compile/index.html   |    2 +
 .../en/cowboy/2.12/manual/cowboy_router/index.html |    2 +
 .../en/cowboy/2.12/manual/cowboy_static/index.html |    2 +
 .../2.12/manual/cowboy_stream.data/index.html      |    2 +
 .../manual/cowboy_stream.early_error/index.html    |    2 +
 .../2.12/manual/cowboy_stream.info/index.html      |    2 +
 .../2.12/manual/cowboy_stream.init/index.html      |    2 +
 .../2.12/manual/cowboy_stream.terminate/index.html |    2 +
 .../en/cowboy/2.12/manual/cowboy_stream/index.html |    2 +
 .../cowboy/2.12/manual/cowboy_stream_h/index.html  |    2 +
 .../cowboy/2.12/manual/cowboy_tracer_h/index.html  |    2 +
 .../cowboy/2.12/manual/cowboy_websocket/index.html |    2 +
 .../2.12/manual/http_status_codes/index.html       |    2 +
 docs/en/cowboy/2.12/manual/index.html              |    2 +
 docs/en/cowboy/2.13/guide/constraints.asciidoc     |  128 +
 docs/en/cowboy/2.13/guide/constraints/index.html   |  264 ++
 docs/en/cowboy/2.13/guide/cookies.asciidoc         |  139 +
 docs/en/cowboy/2.13/guide/cookies/index.html       |  280 ++
 docs/en/cowboy/2.13/guide/cowboy.sty               |    8 +
 docs/en/cowboy/2.13/guide/erlang_web.asciidoc      |  209 ++
 docs/en/cowboy/2.13/guide/erlang_web/index.html    |  229 ++
 docs/en/cowboy/2.13/guide/flow_diagram.asciidoc    |  109 +
 docs/en/cowboy/2.13/guide/flow_diagram/index.html  |  207 ++
 docs/en/cowboy/2.13/guide/getting_started.asciidoc |  153 +
 .../cowboy/2.13/guide/getting_started/index.html   |  284 ++
 docs/en/cowboy/2.13/guide/handlers.asciidoc        |   90 +
 docs/en/cowboy/2.13/guide/handlers/index.html      |  234 ++
 docs/en/cowboy/2.13/guide/http_req_resp.png        |  Bin 0 -> 20713 bytes
 docs/en/cowboy/2.13/guide/http_req_resp.svg        |  543 ++++
 docs/en/cowboy/2.13/guide/index.html               |  262 ++
 docs/en/cowboy/2.13/guide/introduction.asciidoc    |   75 +
 docs/en/cowboy/2.13/guide/introduction/index.html  |  217 ++
 docs/en/cowboy/2.13/guide/listeners.asciidoc       |  128 +
 docs/en/cowboy/2.13/guide/listeners/index.html     |  247 ++
 docs/en/cowboy/2.13/guide/loop_handlers.asciidoc   |  150 +
 docs/en/cowboy/2.13/guide/loop_handlers/index.html |  266 ++
 docs/en/cowboy/2.13/guide/middlewares.asciidoc     |   69 +
 docs/en/cowboy/2.13/guide/middlewares/index.html   |  215 ++
 .../cowboy/2.13/guide/migrating_from_1.0.asciidoc  |  214 ++
 .../2.13/guide/migrating_from_1.0/index.html       |  297 ++
 .../cowboy/2.13/guide/migrating_from_2.0.asciidoc  |  107 +
 .../2.13/guide/migrating_from_2.0/index.html       |  232 ++
 .../cowboy/2.13/guide/migrating_from_2.1.asciidoc  |  107 +
 .../2.13/guide/migrating_from_2.1/index.html       |  243 ++
 .../cowboy/2.13/guide/migrating_from_2.10.asciidoc |  139 +
 .../2.13/guide/migrating_from_2.10/index.html      |  247 ++
 .../cowboy/2.13/guide/migrating_from_2.11.asciidoc |   15 +
 .../2.13/guide/migrating_from_2.11/index.html      |  192 ++
 .../cowboy/2.13/guide/migrating_from_2.12.asciidoc |  115 +
 .../2.13/guide/migrating_from_2.12/index.html      |  242 ++
 .../cowboy/2.13/guide/migrating_from_2.2.asciidoc  |   56 +
 .../2.13/guide/migrating_from_2.2/index.html       |  215 ++
 .../cowboy/2.13/guide/migrating_from_2.3.asciidoc  |   66 +
 .../2.13/guide/migrating_from_2.3/index.html       |  217 ++
 .../cowboy/2.13/guide/migrating_from_2.4.asciidoc  |  109 +
 .../2.13/guide/migrating_from_2.4/index.html       |  245 ++
 .../cowboy/2.13/guide/migrating_from_2.5.asciidoc  |  148 +
 .../2.13/guide/migrating_from_2.5/index.html       |  260 ++
 .../cowboy/2.13/guide/migrating_from_2.6.asciidoc  |  224 ++
 .../2.13/guide/migrating_from_2.6/index.html       |  281 ++
 .../cowboy/2.13/guide/migrating_from_2.7.asciidoc  |  118 +
 .../2.13/guide/migrating_from_2.7/index.html       |  237 ++
 .../cowboy/2.13/guide/migrating_from_2.8.asciidoc  |   50 +
 .../2.13/guide/migrating_from_2.8/index.html       |  208 ++
 .../cowboy/2.13/guide/migrating_from_2.9.asciidoc  |   42 +
 .../2.13/guide/migrating_from_2.9/index.html       |  212 ++
 docs/en/cowboy/2.13/guide/modern_web.asciidoc      |  122 +
 docs/en/cowboy/2.13/guide/modern_web/index.html    |  211 ++
 docs/en/cowboy/2.13/guide/multipart.asciidoc       |  169 ++
 docs/en/cowboy/2.13/guide/multipart/index.html     |  284 ++
 docs/en/cowboy/2.13/guide/performance.asciidoc     |   29 +
 docs/en/cowboy/2.13/guide/performance/index.html   |  189 ++
 docs/en/cowboy/2.13/guide/req.asciidoc             |  370 +++
 docs/en/cowboy/2.13/guide/req/index.html           |  459 +++
 docs/en/cowboy/2.13/guide/req_body.asciidoc        |  146 +
 docs/en/cowboy/2.13/guide/req_body/index.html      |  283 ++
 docs/en/cowboy/2.13/guide/resource_design.asciidoc |  241 ++
 .../cowboy/2.13/guide/resource_design/index.html   |  246 ++
 docs/en/cowboy/2.13/guide/resp.asciidoc            |  368 +++
 docs/en/cowboy/2.13/guide/resp/index.html          |  426 +++
 docs/en/cowboy/2.13/guide/rest_cond.png            |  Bin 0 -> 111628 bytes
 docs/en/cowboy/2.13/guide/rest_cond.svg            | 1656 +++++++++++
 docs/en/cowboy/2.13/guide/rest_conneg.png          |  Bin 0 -> 75587 bytes
 docs/en/cowboy/2.13/guide/rest_conneg.svg          | 1196 ++++++++
 docs/en/cowboy/2.13/guide/rest_delete.png          |  Bin 0 -> 122185 bytes
 docs/en/cowboy/2.13/guide/rest_delete.svg          | 1718 +++++++++++
 docs/en/cowboy/2.13/guide/rest_flowcharts.asciidoc |  261 ++
 .../cowboy/2.13/guide/rest_flowcharts/index.html   |  243 ++
 docs/en/cowboy/2.13/guide/rest_get_head.png        |  Bin 0 -> 171818 bytes
 docs/en/cowboy/2.13/guide/rest_get_head.svg        | 2450 +++++++++++++++
 docs/en/cowboy/2.13/guide/rest_handlers.asciidoc   |  148 +
 docs/en/cowboy/2.13/guide/rest_handlers/index.html |  366 +++
 docs/en/cowboy/2.13/guide/rest_options.png         |  Bin 0 -> 8539 bytes
 docs/en/cowboy/2.13/guide/rest_options.svg         |  387 +++
 docs/en/cowboy/2.13/guide/rest_principles.asciidoc |  160 +
 .../cowboy/2.13/guide/rest_principles/index.html   |  215 ++
 docs/en/cowboy/2.13/guide/rest_put_post_patch.png  |  Bin 0 -> 234474 bytes
 docs/en/cowboy/2.13/guide/rest_put_post_patch.svg  | 3143 ++++++++++++++++++++
 docs/en/cowboy/2.13/guide/rest_start.png           |  Bin 0 -> 107258 bytes
 docs/en/cowboy/2.13/guide/rest_start.svg           | 1665 +++++++++++
 docs/en/cowboy/2.13/guide/routing.asciidoc         |  271 ++
 docs/en/cowboy/2.13/guide/routing/index.html       |  392 +++
 docs/en/cowboy/2.13/guide/specs.asciidoc           |  215 ++
 docs/en/cowboy/2.13/guide/specs/index.html         |  562 ++++
 docs/en/cowboy/2.13/guide/static_files.asciidoc    |  163 +
 docs/en/cowboy/2.13/guide/static_files/index.html  |  278 ++
 docs/en/cowboy/2.13/guide/streams.asciidoc         |   80 +
 docs/en/cowboy/2.13/guide/streams/index.html       |  203 ++
 docs/en/cowboy/2.13/guide/ws_handlers.asciidoc     |  292 ++
 docs/en/cowboy/2.13/guide/ws_handlers/index.html   |  367 +++
 docs/en/cowboy/2.13/guide/ws_protocol.asciidoc     |   69 +
 docs/en/cowboy/2.13/guide/ws_protocol/index.html   |  199 ++
 .../cowboy/2.13/manual/cowboy.get_env/index.html   |  211 ++
 .../cowboy/2.13/manual/cowboy.set_env/index.html   |  214 ++
 .../2.13/manual/cowboy.start_clear/index.html      |  232 ++
 .../cowboy/2.13/manual/cowboy.start_tls/index.html |  237 ++
 .../2.13/manual/cowboy.stop_listener/index.html    |  197 ++
 docs/en/cowboy/2.13/manual/cowboy/index.html       |  233 ++
 docs/en/cowboy/2.13/manual/cowboy_app/index.html   |  244 ++
 .../2.13/manual/cowboy_compress_h/index.html       |  202 ++
 .../2.13/manual/cowboy_constraints.int/index.html  |  207 ++
 .../manual/cowboy_constraints.nonempty/index.html  |  206 ++
 .../2.13/manual/cowboy_constraints/index.html      |  198 ++
 .../2.13/manual/cowboy_decompress_h/index.html     |  197 ++
 .../manual/cowboy_handler.terminate/index.html     |  209 ++
 .../cowboy/2.13/manual/cowboy_handler/index.html   |  201 ++
 docs/en/cowboy/2.13/manual/cowboy_http/index.html  |  330 ++
 docs/en/cowboy/2.13/manual/cowboy_http2/index.html |  378 +++
 docs/en/cowboy/2.13/manual/cowboy_loop/index.html  |  217 ++
 .../cowboy/2.13/manual/cowboy_metrics_h/index.html |  292 ++
 .../2.13/manual/cowboy_middleware/index.html       |  212 ++
 .../2.13/manual/cowboy_req.binding/index.html      |  215 ++
 .../2.13/manual/cowboy_req.bindings/index.html     |  195 ++
 .../2.13/manual/cowboy_req.body_length/index.html  |  196 ++
 .../cowboy/2.13/manual/cowboy_req.cast/index.html  |  224 ++
 .../cowboy/2.13/manual/cowboy_req.cert/index.html  |  215 ++
 .../cowboy_req.delete_resp_header/index.html       |  200 ++
 .../manual/cowboy_req.filter_cookies/index.html    |  203 ++
 .../2.13/manual/cowboy_req.has_body/index.html     |  193 ++
 .../manual/cowboy_req.has_resp_body/index.html     |  198 ++
 .../manual/cowboy_req.has_resp_header/index.html   |  201 ++
 .../2.13/manual/cowboy_req.header/index.html       |  222 ++
 .../2.13/manual/cowboy_req.headers/index.html      |  202 ++
 .../cowboy/2.13/manual/cowboy_req.host/index.html  |  202 ++
 .../2.13/manual/cowboy_req.host_info/index.html    |  196 ++
 .../2.13/manual/cowboy_req.inform/index.html       |  220 ++
 .../manual/cowboy_req.match_cookies/index.html     |  223 ++
 .../2.13/manual/cowboy_req.match_qs/index.html     |  222 ++
 .../2.13/manual/cowboy_req.method/index.html       |  213 ++
 .../manual/cowboy_req.parse_cookies/index.html     |  221 ++
 .../2.13/manual/cowboy_req.parse_header/index.html |  429 +++
 .../2.13/manual/cowboy_req.parse_qs/index.html     |  210 ++
 .../cowboy/2.13/manual/cowboy_req.path/index.html  |  202 ++
 .../2.13/manual/cowboy_req.path_info/index.html    |  196 ++
 .../cowboy/2.13/manual/cowboy_req.peer/index.html  |  206 ++
 .../cowboy/2.13/manual/cowboy_req.port/index.html  |  203 ++
 .../cowboy/2.13/manual/cowboy_req.push/index.html  |  229 ++
 .../en/cowboy/2.13/manual/cowboy_req.qs/index.html |  202 ++
 .../index.html                                     |  253 ++
 .../2.13/manual/cowboy_req.read_body/index.html    |  230 ++
 .../2.13/manual/cowboy_req.read_part/index.html    |  249 ++
 .../manual/cowboy_req.read_part_body/index.html    |  225 ++
 .../cowboy_req.read_urlencoded_body/index.html     |  219 ++
 .../cowboy/2.13/manual/cowboy_req.reply/index.html |  241 ++
 .../2.13/manual/cowboy_req.resp_header/index.html  |  213 ++
 .../2.13/manual/cowboy_req.resp_headers/index.html |  193 ++
 .../2.13/manual/cowboy_req.scheme/index.html       |  207 ++
 .../manual/cowboy_req.set_resp_body/index.html     |  234 ++
 .../manual/cowboy_req.set_resp_cookie/index.html   |  259 ++
 .../manual/cowboy_req.set_resp_header/index.html   |  215 ++
 .../manual/cowboy_req.set_resp_headers/index.html  |  210 ++
 .../cowboy/2.13/manual/cowboy_req.sock/index.html  |  202 ++
 .../2.13/manual/cowboy_req.stream_body/index.html  |  213 ++
 .../manual/cowboy_req.stream_events/index.html     |  227 ++
 .../2.13/manual/cowboy_req.stream_reply/index.html |  230 ++
 .../manual/cowboy_req.stream_trailers/index.html   |  210 ++
 .../cowboy/2.13/manual/cowboy_req.uri/index.html   |  261 ++
 .../2.13/manual/cowboy_req.version/index.html      |  202 ++
 docs/en/cowboy/2.13/manual/cowboy_req/index.html   |  384 +++
 docs/en/cowboy/2.13/manual/cowboy_rest/index.html  |  743 +++++
 .../2.13/manual/cowboy_router.compile/index.html   |  203 ++
 .../en/cowboy/2.13/manual/cowboy_router/index.html |  220 ++
 .../en/cowboy/2.13/manual/cowboy_static/index.html |  280 ++
 .../2.13/manual/cowboy_stream.data/index.html      |  217 ++
 .../manual/cowboy_stream.early_error/index.html    |  214 ++
 .../2.13/manual/cowboy_stream.info/index.html      |  213 ++
 .../2.13/manual/cowboy_stream.init/index.html      |  217 ++
 .../2.13/manual/cowboy_stream.terminate/index.html |  206 ++
 .../en/cowboy/2.13/manual/cowboy_stream/index.html |  440 +++
 .../cowboy/2.13/manual/cowboy_stream_h/index.html  |  213 ++
 .../cowboy/2.13/manual/cowboy_tracer_h/index.html  |  215 ++
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 create mode 100644 docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/index.html
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 create mode 100644 docs/en/cowboy/2.13/manual/cowboy_router.compile/index.html
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 create mode 100644 docs/en/cowboy/2.13/manual/cowboy_stream.data/index.html
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 create mode 100644 docs/en/cowboy/2.13/manual/cowboy_tracer_h/index.html
 create mode 100644 docs/en/cowboy/2.13/manual/cowboy_websocket/index.html
 create mode 100644 docs/en/cowboy/2.13/manual/http_status_codes/index.html
 create mode 100644 docs/en/cowboy/2.13/manual/index.html

diff --git a/_build/content/articles/cowboy-2.13.0.asciidoc b/_build/content/articles/cowboy-2.13.0.asciidoc
new file mode 100644
index 00000000..21bfa567
--- /dev/null
+++ b/_build/content/articles/cowboy-2.13.0.asciidoc
@@ -0,0 +1,34 @@
++++
+date = "2025-02-18T07:00:00+01:00"
+title = "Cowboy 2.13"
+
++++
+
+Cowboy `2.13.0` has been released!
+
+Cowboy 2.13 focuses on improving the performance of
+Websocket, as well as the HTTP protocols. It also
+contains a variety of new features and bug fixes.
+
+The performance improvements were detailed in the
+https://ninenines.eu/articles/cowboy-2.13.0-performance/[Performance improvements in Cowboy 2.13]
+article.
+
+Cowboy 2.13 is the first release to feature
+experimental support for the HTTP/3 protocol,
+including Websocket over HTTP/3.
+
+Cowboy 2.13 requires Erlang/OTP 24.0 or greater.
+It is tested and supported on Linux, macOS and Windows.
+
+A complete
+list of changes can be found in the migration guide:
+https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/[Migrating from Cowboy 2.12 to 2.13].
+
+You can donate to this project via
+https://github.com/sponsors/essen[GitHub Sponsors].
+
+As usual, feedback is appreciated, and issues or
+questions should be sent via Github tickets or
+discussions. We also have a new Discord server.
+https://discord.gg/x25nNq2fFE[Join Erlang OSS Discord now!]
diff --git a/_build/data/projects/cowboy.toml b/_build/data/projects/cowboy.toml
index 1b3c9abe..3c15347e 100644
--- a/_build/data/projects/cowboy.toml
+++ b/_build/data/projects/cowboy.toml
@@ -3,8 +3,8 @@ catchphrase = "Small, fast, modern HTTP server."
 description = "Cowboy is the ultimate server for the modern Web with support for Websocket, HTTP/2 and REST."
 name = "cowboy"
 repository = "https://github.com/ninenines/cowboy"
-versions = ["2.12", "2.11", "2.10", "2.9", "2.8", "2.7", "2.6"]
-branches = ["2.12.0", "2.11.0", "22adc4de517bf54661795f6e18b6b2e62aec4140", "2.9.0", "2.8.0", "2.7.0", "2.6.3"]
+versions = ["2.13", "2.12", "2.11", "2.10", "2.9", "2.8", "2.7", "2.6"]
+branches = ["2.13.0", "2.12.0", "2.11.0", "22adc4de517bf54661795f6e18b6b2e62aec4140", "2.9.0", "2.8.0", "2.7.0", "2.6.3"]
 has_source = true
 has_guide = true
 has_manual = true
diff --git a/articles/asciideck/index.html b/articles/asciideck/index.html
index 60c5caa7..ccfc586a 100644
--- a/articles/asciideck/index.html
+++ b/articles/asciideck/index.html
@@ -109,6 +109,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.0.0-pre.4/index.html b/articles/cowboy-2.0.0-pre.4/index.html
index bc90fa98..a9851d44 100644
--- a/articles/cowboy-2.0.0-pre.4/index.html
+++ b/articles/cowboy-2.0.0-pre.4/index.html
@@ -128,6 +128,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.0.0-rc.1/index.html b/articles/cowboy-2.0.0-rc.1/index.html
index 592a64e2..dd909d01 100644
--- a/articles/cowboy-2.0.0-rc.1/index.html
+++ b/articles/cowboy-2.0.0-rc.1/index.html
@@ -99,6 +99,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.0.0-rc.2/index.html b/articles/cowboy-2.0.0-rc.2/index.html
index 50911725..3027b9af 100644
--- a/articles/cowboy-2.0.0-rc.2/index.html
+++ b/articles/cowboy-2.0.0-rc.2/index.html
@@ -92,6 +92,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.0.0/index.html b/articles/cowboy-2.0.0/index.html
index 513d86c8..2742e197 100644
--- a/articles/cowboy-2.0.0/index.html
+++ b/articles/cowboy-2.0.0/index.html
@@ -98,6 +98,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.1.0/index.html b/articles/cowboy-2.1.0/index.html
index 2d45e0cd..29ac1887 100644
--- a/articles/cowboy-2.1.0/index.html
+++ b/articles/cowboy-2.1.0/index.html
@@ -95,6 +95,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.11.0/index.html b/articles/cowboy-2.11.0/index.html
index 561c3622..f78364a5 100644
--- a/articles/cowboy-2.11.0/index.html
+++ b/articles/cowboy-2.11.0/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.12.0/index.html b/articles/cowboy-2.12.0/index.html
index b0f22169..118d825f 100644
--- a/articles/cowboy-2.12.0/index.html
+++ b/articles/cowboy-2.12.0/index.html
@@ -89,6 +89,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.13.0-performance/index.html b/articles/cowboy-2.13.0-performance/index.html
index e1f3d183..fb1a0c59 100644
--- a/articles/cowboy-2.13.0-performance/index.html
+++ b/articles/cowboy-2.13.0-performance/index.html
@@ -103,6 +103,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.13.0/index.html b/articles/cowboy-2.13.0/index.html
new file mode 100644
index 00000000..0aec7b32
--- /dev/null
+++ b/articles/cowboy-2.13.0/index.html
@@ -0,0 +1,373 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Cowboy 2.13</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li class="active"><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents">
+<div class="container">
+<div class="row">
+<div class="span9 maincol">
+
+<article class="blog_item">
+<header>
+	<h1 class="lined-header"><span>Cowboy 2.13</span></h1>
+	<p class="date">
+		<span class="year">2025</span>
+		<span class="day-month">18 Feb</span>
+	</p>
+</header>
+
+<p>Cowboy <code>2.13.0</code> has been released!</p>
+<p>Cowboy 2.13 focuses on improving the performance of Websocket, as well as the HTTP protocols. It also contains a variety of new features and bug fixes.</p>
+<p>The performance improvements were detailed in the <a href="https://ninenines.eu/articles/cowboy-2.13.0-performance/">Performance improvements in Cowboy 2.13</a> article.</p>
+<p>Cowboy 2.13 is the first release to feature experimental support for the HTTP/3 protocol, including Websocket over HTTP/3.</p>
+<p>Cowboy 2.13 requires Erlang/OTP 24.0 or greater. It is tested and supported on Linux, macOS and Windows.</p>
+<p>A complete list of changes can be found in the migration guide: <a href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/">Migrating from Cowboy 2.12 to 2.13</a>.</p>
+<p>You can donate to this project via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>.</p>
+<p>As usual, feedback is appreciated, and issues or questions should be sent via Github tickets or discussions. We also have a new Discord server. <a href="https://discord.gg/x25nNq2fFE">Join Erlang OSS Discord now!</a></p>
+
+
+</article>
+</div>
+
+<div class="span3 sidecol">
+<h3>More articles</h3>
+<ul id="articles-nav" class="extra_margin">
+	
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0-performance/">Performance improvements in Cowboy 2.13</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/discord-server/">Erlang OSS Discord server</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.12.0/">Cowboy 2.12</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.11.0/">Cowboy 2.11</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/otp-26/">Erlang/OTP 26</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-2.0.0/">Gun 2.0</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-2.1.0/">Ranch 2.1</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.9.0/">Cowboy 2.9</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-2.0.0-rc.1/">Gun 2.0 release candidate 1</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-2.0.0/">Ranch 2.0</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.8.0/">Cowboy 2.8</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/the-gateway-trilogy/">The Gateway Trilogy</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-2.0.0-pre.2/">Gun 2.0 pre-release 2</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/merry-christmas-2019/">Merry Christmas 2019: New Beginnings</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/github-sponsors/">GitHub Sponsors</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.7.0/">Cowboy 2.7</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-2.0.0-pre.1/">Gun 2.0 pre-release 1</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/erlang-meetup-10-septembre-2019/">Erlang meetup: 10 septembre 2019</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-2.0.0-rc.1/">Ranch 2.0 release candidate 1</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/joe_the_rubber_duck/">Joe Armstrong the rubber duck</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/merry-christmas-2018/">Merry Christmas 2018: A Recap</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.6.0/">Cowboy 2.6</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-1.7.0/">Ranch 1.7</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.5.0/">Cowboy 2.5</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-1.3.0/">Gun 1.3</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-1.2.0/">Gun 1.2</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-1.6.0/">Ranch 1.6</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-1.0.0/">Gun 1.0</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/asciideck/">Asciideck: Asciidoc for Erlang</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/gun-1.0.0-rc.1/">Gun 1.0 release candidate 1</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.4.0/">Cowboy 2.4</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.3.0/">Cowboy 2.3</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.2.0/">Cowboy 2.2</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.1.0/">Cowboy 2.1</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.0.0/">Cowboy 2.0</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.0.0-rc.2/">Cowboy 2.0 release candidate 2</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.0.0-rc.1/">Cowboy 2.0 release candidate 1</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/the-elephant-in-the-room/">The elephant in the room</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/dont-let-it-crash/">Don&#39;t let it crash</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.0.0-pre.4/">Cowboy 2.0 pre-release 4</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-1.3/">Ranch 1.3</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ml-archives/">Mailing list archived</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/website-update/">Website update</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/erlanger-playbook-september-2015-update/">The Erlanger Playbook September 2015 Update</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/erlanger-playbook/">The Erlanger Playbook</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/erlang-validate-utf8/">Validating UTF-8 binaries with Erlang</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/on-open-source/">On open source</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/the-story-so-far/">The story so far</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/cowboy2-qs/">Cowboy 2.0 and query strings</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/january-2014-status/">January 2014 status</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/farwest-funded/">Farwest got funded!</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/erlang.mk-and-relx/">Build Erlang releases with Erlang.mk and Relx</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/xerl-0.5-intermediate-module/">Xerl: intermediate module</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/xerl-0.4-expression-separator/">Xerl: expression separator</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/erlang-scalability/">Erlang Scalability</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/xerl-0.3-atomic-expressions/">Xerl: atomic expressions</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/xerl-0.2-two-modules/">Xerl: two modules</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/xerl-0.1-empty-modules/">Xerl: empty modules</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/ranch-ftp/">Build an FTP Server with Ranch in 30 Minutes</a></li>
+		
+	
+		
+			<li><a href="https://ninenines.eu/articles/tictactoe/">Erlang Tic Tac Toe</a></li>
+		
+	
+</ul>
+
+<h3>Feedback</h3>
+<p>Feel free to <a href="mailto:contact@ninenines.eu">email us</a>
+if you found any mistake or need clarification on any of the
+articles.</p>
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
diff --git a/articles/cowboy-2.2.0/index.html b/articles/cowboy-2.2.0/index.html
index 49684942..871dc33c 100644
--- a/articles/cowboy-2.2.0/index.html
+++ b/articles/cowboy-2.2.0/index.html
@@ -93,6 +93,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.3.0/index.html b/articles/cowboy-2.3.0/index.html
index c15697e2..ad41bb42 100644
--- a/articles/cowboy-2.3.0/index.html
+++ b/articles/cowboy-2.3.0/index.html
@@ -85,6 +85,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.4.0/index.html b/articles/cowboy-2.4.0/index.html
index c2974367..a71d8046 100644
--- a/articles/cowboy-2.4.0/index.html
+++ b/articles/cowboy-2.4.0/index.html
@@ -87,6 +87,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.5.0/index.html b/articles/cowboy-2.5.0/index.html
index 02e99619..e6f6be96 100644
--- a/articles/cowboy-2.5.0/index.html
+++ b/articles/cowboy-2.5.0/index.html
@@ -91,6 +91,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.6.0/index.html b/articles/cowboy-2.6.0/index.html
index b662f884..6cf18362 100644
--- a/articles/cowboy-2.6.0/index.html
+++ b/articles/cowboy-2.6.0/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.7.0/index.html b/articles/cowboy-2.7.0/index.html
index 719b4506..604508be 100644
--- a/articles/cowboy-2.7.0/index.html
+++ b/articles/cowboy-2.7.0/index.html
@@ -89,6 +89,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.8.0/index.html b/articles/cowboy-2.8.0/index.html
index ef5fe655..8df53254 100644
--- a/articles/cowboy-2.8.0/index.html
+++ b/articles/cowboy-2.8.0/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy-2.9.0/index.html b/articles/cowboy-2.9.0/index.html
index c54f858a..105fd467 100644
--- a/articles/cowboy-2.9.0/index.html
+++ b/articles/cowboy-2.9.0/index.html
@@ -87,6 +87,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/cowboy2-qs/index.html b/articles/cowboy2-qs/index.html
index 1d7c38a4..6202e813 100644
--- a/articles/cowboy2-qs/index.html
+++ b/articles/cowboy2-qs/index.html
@@ -129,6 +129,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/discord-server/index.html b/articles/discord-server/index.html
index fac351ca..8009c348 100644
--- a/articles/discord-server/index.html
+++ b/articles/discord-server/index.html
@@ -85,6 +85,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/dont-let-it-crash/index.html b/articles/dont-let-it-crash/index.html
index d5e9ed8b..42524da9 100644
--- a/articles/dont-let-it-crash/index.html
+++ b/articles/dont-let-it-crash/index.html
@@ -104,6 +104,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/erlang-meetup-10-septembre-2019/index.html b/articles/erlang-meetup-10-septembre-2019/index.html
index 6e75b007..409f0b81 100644
--- a/articles/erlang-meetup-10-septembre-2019/index.html
+++ b/articles/erlang-meetup-10-septembre-2019/index.html
@@ -84,6 +84,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/erlang-scalability/index.html b/articles/erlang-scalability/index.html
index 1de58a9e..9a1aa8d6 100644
--- a/articles/erlang-scalability/index.html
+++ b/articles/erlang-scalability/index.html
@@ -116,6 +116,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/erlang-validate-utf8/index.html b/articles/erlang-validate-utf8/index.html
index 1122acc5..7e44c1dd 100644
--- a/articles/erlang-validate-utf8/index.html
+++ b/articles/erlang-validate-utf8/index.html
@@ -232,6 +232,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/erlang.mk-and-relx/index.html b/articles/erlang.mk-and-relx/index.html
index 1faf7d59..d1385ad0 100644
--- a/articles/erlang.mk-and-relx/index.html
+++ b/articles/erlang.mk-and-relx/index.html
@@ -118,6 +118,10 @@ cowboy-0.8.5	erlydtl-0.7.0  ninenines-0.2.0	stdlib-1.19.1</pre></div></div>
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/erlanger-playbook-september-2015-update/index.html b/articles/erlanger-playbook-september-2015-update/index.html
index ee0ec3e2..016cd9e3 100644
--- a/articles/erlanger-playbook-september-2015-update/index.html
+++ b/articles/erlanger-playbook-september-2015-update/index.html
@@ -87,6 +87,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/erlanger-playbook/index.html b/articles/erlanger-playbook/index.html
index 92e8d252..7f917449 100644
--- a/articles/erlanger-playbook/index.html
+++ b/articles/erlanger-playbook/index.html
@@ -128,6 +128,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/farwest-funded/index.html b/articles/farwest-funded/index.html
index ee501b92..f1f867df 100644
--- a/articles/farwest-funded/index.html
+++ b/articles/farwest-funded/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/github-sponsors/index.html b/articles/github-sponsors/index.html
index 00a68b0e..e7910dc0 100644
--- a/articles/github-sponsors/index.html
+++ b/articles/github-sponsors/index.html
@@ -85,6 +85,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-1.0.0-rc.1/index.html b/articles/gun-1.0.0-rc.1/index.html
index 1cbdeb33..b26375f3 100644
--- a/articles/gun-1.0.0-rc.1/index.html
+++ b/articles/gun-1.0.0-rc.1/index.html
@@ -89,6 +89,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-1.0.0/index.html b/articles/gun-1.0.0/index.html
index 531904fa..7731c63c 100644
--- a/articles/gun-1.0.0/index.html
+++ b/articles/gun-1.0.0/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-1.2.0/index.html b/articles/gun-1.2.0/index.html
index 998ada9c..2219e622 100644
--- a/articles/gun-1.2.0/index.html
+++ b/articles/gun-1.2.0/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-1.3.0/index.html b/articles/gun-1.3.0/index.html
index 21261580..15246fe7 100644
--- a/articles/gun-1.3.0/index.html
+++ b/articles/gun-1.3.0/index.html
@@ -86,6 +86,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-2.0.0-pre.1/index.html b/articles/gun-2.0.0-pre.1/index.html
index 69729fa6..8635550e 100644
--- a/articles/gun-2.0.0-pre.1/index.html
+++ b/articles/gun-2.0.0-pre.1/index.html
@@ -93,6 +93,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-2.0.0-pre.2/index.html b/articles/gun-2.0.0-pre.2/index.html
index 3caaaad0..9aa8cca4 100644
--- a/articles/gun-2.0.0-pre.2/index.html
+++ b/articles/gun-2.0.0-pre.2/index.html
@@ -91,6 +91,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-2.0.0-rc.1/index.html b/articles/gun-2.0.0-rc.1/index.html
index a26bb8df..10b3e94c 100644
--- a/articles/gun-2.0.0-rc.1/index.html
+++ b/articles/gun-2.0.0-rc.1/index.html
@@ -96,6 +96,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/gun-2.0.0/index.html b/articles/gun-2.0.0/index.html
index 21f6095b..3053cf81 100644
--- a/articles/gun-2.0.0/index.html
+++ b/articles/gun-2.0.0/index.html
@@ -98,6 +98,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/index.html b/articles/index.html
index a6e2b17f..d1cf2a6a 100644
--- a/articles/index.html
+++ b/articles/index.html
@@ -63,6 +63,26 @@
 <h1 class="lined-header"><span>Articles</span></h1>
 
 
+	<article class="blog_item">
+		<header>
+			<h2><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></h2>
+			<p class="date">
+				<span class="year">2025</span>
+				<span class="day-month">18 Feb</span>
+			</p>
+		</header>
+
+		<p>Cowboy 2.13.0 has been released!
+Cowboy 2.13 focuses on improving the performance of Websocket, as well as the HTTP protocols. It also contains a variety of new features and bug fixes.
+The performance improvements were detailed in the Performance improvements in Cowboy 2.13 article.
+Cowboy 2.13 is the first release to feature experimental support for the HTTP/3 protocol, including Websocket over HTTP/3.
+Cowboy 2.13 requires Erlang/OTP 24.0 or greater. It is tested and supported on Linux, macOS and Windows.</p>
+
+		<p style="text-align:right">
+			<a class="read_more" href="https://ninenines.eu/articles/cowboy-2.13.0/">Read More</a>
+		</p>
+	</article>
+
 	<article class="blog_item">
 		<header>
 			<h2><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></h2>
@@ -407,24 +427,6 @@ Je serai au meetup Erlang le 10 septembre chez Datadog à Paris.</p>
 		</p>
 	</article>
 
-	<article class="blog_item">
-		<header>
-			<h2><a href="https://ninenines.eu/articles/ranch-2.0.0-rc.1/">Ranch 2.0 release candidate 1</a></h2>
-			<p class="date">
-				<span class="year">2019</span>
-				<span class="day-month">18 Jul</span>
-			</p>
-		</header>
-
-		<p>Ranch 2.0.0-rc.1 has been released!
-We are getting very close to releasing Ranch 2.0! As most of the tremendous programming work was done by contributor Jan Uhlig, I will yield the floor and let him describe what went into this great release.
-In Ranch 1.x, there is only one supervisor per Ranch listener to start and manage connection processes. Under high load (many clients rapidly connecting and/or disconnecting), the message queue of this one supervisor could become congested, leading to declining accept rates or a stalled listener.</p>
-
-		<p style="text-align:right">
-			<a class="read_more" href="https://ninenines.eu/articles/ranch-2.0.0-rc.1/">Read More</a>
-		</p>
-	</article>
-
 
 
 <nav class="pagination" role="pagination">
diff --git a/articles/index.xml b/articles/index.xml
index 78a3ab74..72c8b1dd 100644
--- a/articles/index.xml
+++ b/articles/index.xml
@@ -6,11 +6,24 @@
     <description>Recent content in Articles on Nine Nines</description>
     <generator>Hugo -- gohugo.io</generator>
     <language>en-us</language>
-    <lastBuildDate>Mon, 17 Feb 2025 07:00:00 +0100</lastBuildDate>
+    <lastBuildDate>Tue, 18 Feb 2025 07:00:00 +0100</lastBuildDate>
     
 	<atom:link href="https://ninenines.eu/articles/index.xml" rel="self" type="application/rss+xml" />
     
     
+    <item>
+      <title>Cowboy 2.13</title>
+      <link>https://ninenines.eu/articles/cowboy-2.13.0/</link>
+      <pubDate>Tue, 18 Feb 2025 07:00:00 +0100</pubDate>
+      
+      <guid>https://ninenines.eu/articles/cowboy-2.13.0/</guid>
+      <description>Cowboy 2.13.0 has been released!
+Cowboy 2.13 focuses on improving the performance of Websocket, as well as the HTTP protocols. It also contains a variety of new features and bug fixes.
+The performance improvements were detailed in the Performance improvements in Cowboy 2.13 article.
+Cowboy 2.13 is the first release to feature experimental support for the HTTP/3 protocol, including Websocket over HTTP/3.
+Cowboy 2.13 requires Erlang/OTP 24.0 or greater. It is tested and supported on Linux, macOS and Windows.</description>
+    </item>
+    
     <item>
       <title>Ranch 2.2</title>
       <link>https://ninenines.eu/articles/ranch-2.2.0/</link>
diff --git a/articles/january-2014-status/index.html b/articles/january-2014-status/index.html
index 2527056e..1936d650 100644
--- a/articles/january-2014-status/index.html
+++ b/articles/january-2014-status/index.html
@@ -114,6 +114,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/joe_the_rubber_duck/index.html b/articles/joe_the_rubber_duck/index.html
index 299fc8ff..88875513 100644
--- a/articles/joe_the_rubber_duck/index.html
+++ b/articles/joe_the_rubber_duck/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/merry-christmas-2018/index.html b/articles/merry-christmas-2018/index.html
index 1eebacbb..99a88e73 100644
--- a/articles/merry-christmas-2018/index.html
+++ b/articles/merry-christmas-2018/index.html
@@ -95,6 +95,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/merry-christmas-2019/index.html b/articles/merry-christmas-2019/index.html
index 45f77e14..1f5e891e 100644
--- a/articles/merry-christmas-2019/index.html
+++ b/articles/merry-christmas-2019/index.html
@@ -91,6 +91,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ml-archives/index.html b/articles/ml-archives/index.html
index 4d5b72d0..413415c1 100644
--- a/articles/ml-archives/index.html
+++ b/articles/ml-archives/index.html
@@ -85,6 +85,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/on-open-source/index.html b/articles/on-open-source/index.html
index 26f8f131..567dca2c 100644
--- a/articles/on-open-source/index.html
+++ b/articles/on-open-source/index.html
@@ -97,6 +97,10 @@ much left to look at today</a>. This was followed by a <a href="https://github.c
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/otp-26/index.html b/articles/otp-26/index.html
index 1498526c..222761e4 100644
--- a/articles/otp-26/index.html
+++ b/articles/otp-26/index.html
@@ -92,6 +92,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/page/2/index.html b/articles/page/2/index.html
index 4596a0c1..3855283a 100644
--- a/articles/page/2/index.html
+++ b/articles/page/2/index.html
@@ -63,6 +63,24 @@
 <h1 class="lined-header"><span>Articles</span></h1>
 
 
+	<article class="blog_item">
+		<header>
+			<h2><a href="https://ninenines.eu/articles/ranch-2.0.0-rc.1/">Ranch 2.0 release candidate 1</a></h2>
+			<p class="date">
+				<span class="year">2019</span>
+				<span class="day-month">18 Jul</span>
+			</p>
+		</header>
+
+		<p>Ranch 2.0.0-rc.1 has been released!
+We are getting very close to releasing Ranch 2.0! As most of the tremendous programming work was done by contributor Jan Uhlig, I will yield the floor and let him describe what went into this great release.
+In Ranch 1.x, there is only one supervisor per Ranch listener to start and manage connection processes. Under high load (many clients rapidly connecting and/or disconnecting), the message queue of this one supervisor could become congested, leading to declining accept rates or a stalled listener.</p>
+
+		<p style="text-align:right">
+			<a class="read_more" href="https://ninenines.eu/articles/ranch-2.0.0-rc.1/">Read More</a>
+		</p>
+	</article>
+
 	<article class="blog_item">
 		<header>
 			<h2><a href="https://ninenines.eu/articles/joe_the_rubber_duck/">Joe Armstrong the rubber duck</a></h2>
@@ -417,23 +435,6 @@ You lost them. You know you lost them. They comment on the syntax, or perhaps yo
 		</p>
 	</article>
 
-	<article class="blog_item">
-		<header>
-			<h2><a href="https://ninenines.eu/articles/dont-let-it-crash/">Don&#39;t let it crash</a></h2>
-			<p class="date">
-				<span class="year">2017</span>
-				<span class="day-month">22 Jan</span>
-			</p>
-		</header>
-
-		<p>We have a specific mindset when writing Erlang programs. We focus on the normal execution of the program and don&apos;t handle most of the errors that may occur. We sometimes call this normal execution the happy path.
-The general pattern behind writing only for the happy path, letting the VM catch errors (writing them to a log for future consumption) and then having a supervisor restart the processes that failed from a clean state, has a name.</p>
-
-		<p style="text-align:right">
-			<a class="read_more" href="https://ninenines.eu/articles/dont-let-it-crash/">Read More</a>
-		</p>
-	</article>
-
 
 
 <nav class="pagination" role="pagination">
diff --git a/articles/page/3/index.html b/articles/page/3/index.html
index 5fc4d538..492d6b14 100644
--- a/articles/page/3/index.html
+++ b/articles/page/3/index.html
@@ -63,6 +63,23 @@
 <h1 class="lined-header"><span>Articles</span></h1>
 
 
+	<article class="blog_item">
+		<header>
+			<h2><a href="https://ninenines.eu/articles/dont-let-it-crash/">Don&#39;t let it crash</a></h2>
+			<p class="date">
+				<span class="year">2017</span>
+				<span class="day-month">22 Jan</span>
+			</p>
+		</header>
+
+		<p>We have a specific mindset when writing Erlang programs. We focus on the normal execution of the program and don&apos;t handle most of the errors that may occur. We sometimes call this normal execution the happy path.
+The general pattern behind writing only for the happy path, letting the VM catch errors (writing them to a log for future consumption) and then having a supervisor restart the processes that failed from a clean state, has a name.</p>
+
+		<p style="text-align:right">
+			<a class="read_more" href="https://ninenines.eu/articles/dont-let-it-crash/">Read More</a>
+		</p>
+	</article>
+
 	<article class="blog_item">
 		<header>
 			<h2><a href="https://ninenines.eu/articles/cowboy-2.0.0-pre.4/">Cowboy 2.0 pre-release 4</a></h2>
@@ -408,23 +425,6 @@ We are just starting, so let&apos;s no go ahead of ourselves here. We&apos;ll be
 		</p>
 	</article>
 
-	<article class="blog_item">
-		<header>
-			<h2><a href="https://ninenines.eu/articles/ranch-ftp/">Build an FTP Server with Ranch in 30 Minutes</a></h2>
-			<p class="date">
-				<span class="year">2012</span>
-				<span class="day-month">14 Nov</span>
-			</p>
-		</header>
-
-		<p>Last week I was speaking at the London Erlang Factory Lite where I presented a live demonstration of building an FTP server using Ranch. As there was no slide, you should use this article as a reference instead.
-The goal of this article is to showcase how to use Ranch for writing a network protocol implementation, how Ranch gets out of the way to let you write the code that matters, and the common techniques used when writing servers.</p>
-
-		<p style="text-align:right">
-			<a class="read_more" href="https://ninenines.eu/articles/ranch-ftp/">Read More</a>
-		</p>
-	</article>
-
 
 
 <nav class="pagination" role="pagination">
diff --git a/articles/page/4/index.html b/articles/page/4/index.html
index 87efc9d0..53e77536 100644
--- a/articles/page/4/index.html
+++ b/articles/page/4/index.html
@@ -63,6 +63,23 @@
 <h1 class="lined-header"><span>Articles</span></h1>
 
 
+	<article class="blog_item">
+		<header>
+			<h2><a href="https://ninenines.eu/articles/ranch-ftp/">Build an FTP Server with Ranch in 30 Minutes</a></h2>
+			<p class="date">
+				<span class="year">2012</span>
+				<span class="day-month">14 Nov</span>
+			</p>
+		</header>
+
+		<p>Last week I was speaking at the London Erlang Factory Lite where I presented a live demonstration of building an FTP server using Ranch. As there was no slide, you should use this article as a reference instead.
+The goal of this article is to showcase how to use Ranch for writing a network protocol implementation, how Ranch gets out of the way to let you write the code that matters, and the common techniques used when writing servers.</p>
+
+		<p style="text-align:right">
+			<a class="read_more" href="https://ninenines.eu/articles/ranch-ftp/">Read More</a>
+		</p>
+	</article>
+
 	<article class="blog_item">
 		<header>
 			<h2><a href="https://ninenines.eu/articles/tictactoe/">Erlang Tic Tac Toe</a></h2>
diff --git a/articles/ranch-1.3/index.html b/articles/ranch-1.3/index.html
index 225b3489..3c1850df 100644
--- a/articles/ranch-1.3/index.html
+++ b/articles/ranch-1.3/index.html
@@ -126,6 +126,10 @@ Primary key fingerprint<font color="#990000">:</font> F19F 189C ECC7 <font color
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ranch-1.6.0/index.html b/articles/ranch-1.6.0/index.html
index 2ac9b2c7..f4140cc1 100644
--- a/articles/ranch-1.6.0/index.html
+++ b/articles/ranch-1.6.0/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ranch-1.7.0/index.html b/articles/ranch-1.7.0/index.html
index 6deffee1..f29a7915 100644
--- a/articles/ranch-1.7.0/index.html
+++ b/articles/ranch-1.7.0/index.html
@@ -87,6 +87,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ranch-2.0.0-rc.1/index.html b/articles/ranch-2.0.0-rc.1/index.html
index dd3aec72..513dbaa6 100644
--- a/articles/ranch-2.0.0-rc.1/index.html
+++ b/articles/ranch-2.0.0-rc.1/index.html
@@ -96,6 +96,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ranch-2.0.0/index.html b/articles/ranch-2.0.0/index.html
index d56d958b..3f595900 100644
--- a/articles/ranch-2.0.0/index.html
+++ b/articles/ranch-2.0.0/index.html
@@ -95,6 +95,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ranch-2.1.0/index.html b/articles/ranch-2.1.0/index.html
index 24d55447..9bb62a80 100644
--- a/articles/ranch-2.1.0/index.html
+++ b/articles/ranch-2.1.0/index.html
@@ -90,6 +90,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ranch-2.2.0/index.html b/articles/ranch-2.2.0/index.html
index 6dcc175c..4fea2c69 100644
--- a/articles/ranch-2.2.0/index.html
+++ b/articles/ranch-2.2.0/index.html
@@ -88,6 +88,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/ranch-ftp/index.html b/articles/ranch-ftp/index.html
index 83ff1a67..bd7c4fc6 100644
--- a/articles/ranch-ftp/index.html
+++ b/articles/ranch-ftp/index.html
@@ -228,6 +228,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/the-elephant-in-the-room/index.html b/articles/the-elephant-in-the-room/index.html
index c38f9a4b..08a25daf 100644
--- a/articles/the-elephant-in-the-room/index.html
+++ b/articles/the-elephant-in-the-room/index.html
@@ -110,6 +110,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/the-gateway-trilogy/index.html b/articles/the-gateway-trilogy/index.html
index 874bbb52..6d6bbc33 100644
--- a/articles/the-gateway-trilogy/index.html
+++ b/articles/the-gateway-trilogy/index.html
@@ -85,6 +85,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/the-story-so-far/index.html b/articles/the-story-so-far/index.html
index 9bf4ee01..49953d32 100644
--- a/articles/the-story-so-far/index.html
+++ b/articles/the-story-so-far/index.html
@@ -101,6 +101,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/tictactoe/index.html b/articles/tictactoe/index.html
index db4c3b18..a790b193 100644
--- a/articles/tictactoe/index.html
+++ b/articles/tictactoe/index.html
@@ -133,6 +133,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/website-update/index.html b/articles/website-update/index.html
index bc9b194c..d3ccbcca 100644
--- a/articles/website-update/index.html
+++ b/articles/website-update/index.html
@@ -90,6 +90,10 @@
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/xerl-0.1-empty-modules/index.html b/articles/xerl-0.1-empty-modules/index.html
index 9d172841..cc4b2e35 100644
--- a/articles/xerl-0.1-empty-modules/index.html
+++ b/articles/xerl-0.1-empty-modules/index.html
@@ -168,6 +168,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/xerl-0.2-two-modules/index.html b/articles/xerl-0.2-two-modules/index.html
index 4ec4f6c0..3662f675 100644
--- a/articles/xerl-0.2-two-modules/index.html
+++ b/articles/xerl-0.2-two-modules/index.html
@@ -196,6 +196,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/xerl-0.3-atomic-expressions/index.html b/articles/xerl-0.3-atomic-expressions/index.html
index ef2adbaf..d6a25886 100644
--- a/articles/xerl-0.3-atomic-expressions/index.html
+++ b/articles/xerl-0.3-atomic-expressions/index.html
@@ -165,6 +165,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/xerl-0.4-expression-separator/index.html b/articles/xerl-0.4-expression-separator/index.html
index 728b9c8b..74813db8 100644
--- a/articles/xerl-0.4-expression-separator/index.html
+++ b/articles/xerl-0.4-expression-separator/index.html
@@ -117,6 +117,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
diff --git a/articles/xerl-0.5-intermediate-module/index.html b/articles/xerl-0.5-intermediate-module/index.html
index c2e16342..2ac33af1 100644
--- a/articles/xerl-0.5-intermediate-module/index.html
+++ b/articles/xerl-0.5-intermediate-module/index.html
@@ -161,6 +161,10 @@ http://www.gnu.org/software/src-highlite -->
 		
 	
 		
+			<li><a href="https://ninenines.eu/articles/cowboy-2.13.0/">Cowboy 2.13</a></li>
+		
+	
+		
 			<li><a href="https://ninenines.eu/articles/ranch-2.2.0/">Ranch 2.2</a></li>
 		
 	
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index a404b028..9d1e6a62 100644
--- a/docs/en/cowboy/2.10/guide/constraints/index.html
+++ b/docs/en/cowboy/2.10/guide/constraints/index.html
@@ -197,6 +197,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.10/guide/cookies/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.10/guide/erlang_web/index.html
@@ -163,6 +163,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.10/guide/flow_diagram/index.html
@@ -141,6 +141,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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--- a/docs/en/cowboy/2.10/guide/getting_started/index.html
+++ b/docs/en/cowboy/2.10/guide/getting_started/index.html
@@ -215,6 +215,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.10/guide/handlers/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/index.html b/docs/en/cowboy/2.10/guide/index.html
index 3aca4656..0c453efc 100644
--- a/docs/en/cowboy/2.10/guide/index.html
+++ b/docs/en/cowboy/2.10/guide/index.html
@@ -190,6 +190,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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index 0d45310c..98d5d04c 100644
--- a/docs/en/cowboy/2.10/guide/introduction/index.html
+++ b/docs/en/cowboy/2.10/guide/introduction/index.html
@@ -151,6 +151,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.10/guide/listeners/index.html
@@ -181,6 +181,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.10/guide/loop_handlers/index.html
@@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.10/guide/middlewares/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_1.0/index.html b/docs/en/cowboy/2.10/guide/migrating_from_1.0/index.html
index 9726239b..8b1447a5 100644
--- a/docs/en/cowboy/2.10/guide/migrating_from_1.0/index.html
+++ b/docs/en/cowboy/2.10/guide/migrating_from_1.0/index.html
@@ -231,6 +231,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.0/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.0/index.html
index b87a4424..645f3648 100644
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.0/index.html
@@ -166,6 +166,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.1/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.1/index.html
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.1/index.html
@@ -177,6 +177,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.2/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.2/index.html
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.2/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.3/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.3/index.html
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.3/index.html
@@ -151,6 +151,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.4/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.4/index.html
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.4/index.html
@@ -179,6 +179,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.5/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.5/index.html
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.5/index.html
@@ -194,6 +194,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.6/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.6/index.html
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.6/index.html
@@ -215,6 +215,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.7/index.html
@@ -171,6 +171,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/migrating_from_2.8/index.html b/docs/en/cowboy/2.10/guide/migrating_from_2.8/index.html
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.8/index.html
@@ -142,6 +142,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/migrating_from_2.9/index.html
@@ -146,6 +146,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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--- a/docs/en/cowboy/2.10/guide/modern_web/index.html
+++ b/docs/en/cowboy/2.10/guide/modern_web/index.html
@@ -145,6 +145,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/multipart/index.html
@@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 9f4a9fd1..5accc48e 100644
--- a/docs/en/cowboy/2.10/guide/performance/index.html
+++ b/docs/en/cowboy/2.10/guide/performance/index.html
@@ -123,6 +123,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 938973c6..1749876d 100644
--- a/docs/en/cowboy/2.10/guide/req/index.html
+++ b/docs/en/cowboy/2.10/guide/req/index.html
@@ -393,6 +393,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/req_body/index.html
@@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/resource_design/index.html
@@ -178,6 +178,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/resp/index.html
@@ -360,6 +360,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/rest_flowcharts/index.html
@@ -175,6 +175,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.10/guide/rest_handlers/index.html
@@ -276,6 +276,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 265e870a..32ce15c6 100644
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+++ b/docs/en/cowboy/2.10/guide/rest_principles/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/routing/index.html b/docs/en/cowboy/2.10/guide/routing/index.html
index 5cbe1b87..318bcdc7 100644
--- a/docs/en/cowboy/2.10/guide/routing/index.html
+++ b/docs/en/cowboy/2.10/guide/routing/index.html
@@ -326,6 +326,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/specs/index.html b/docs/en/cowboy/2.10/guide/specs/index.html
index 662161cc..1d7571e7 100644
--- a/docs/en/cowboy/2.10/guide/specs/index.html
+++ b/docs/en/cowboy/2.10/guide/specs/index.html
@@ -496,6 +496,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/static_files/index.html b/docs/en/cowboy/2.10/guide/static_files/index.html
index 5cf7ab57..92b9a6f2 100644
--- a/docs/en/cowboy/2.10/guide/static_files/index.html
+++ b/docs/en/cowboy/2.10/guide/static_files/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/streams/index.html b/docs/en/cowboy/2.10/guide/streams/index.html
index d4b7d08b..18618706 100644
--- a/docs/en/cowboy/2.10/guide/streams/index.html
+++ b/docs/en/cowboy/2.10/guide/streams/index.html
@@ -136,6 +136,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/ws_handlers/index.html b/docs/en/cowboy/2.10/guide/ws_handlers/index.html
index 4463e108..dc6b19b4 100644
--- a/docs/en/cowboy/2.10/guide/ws_handlers/index.html
+++ b/docs/en/cowboy/2.10/guide/ws_handlers/index.html
@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/guide/ws_protocol/index.html b/docs/en/cowboy/2.10/guide/ws_protocol/index.html
index 15d1894c..c2a15bb2 100644
--- a/docs/en/cowboy/2.10/guide/ws_protocol/index.html
+++ b/docs/en/cowboy/2.10/guide/ws_protocol/index.html
@@ -133,6 +133,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.10/manual/cowboy.set_env/index.html
index 7fc7c5d1..4c1d55d1 100644
--- a/docs/en/cowboy/2.10/manual/cowboy.set_env/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy.set_env/index.html
@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.10/manual/cowboy.start_clear/index.html
index 704330ad..304937aa 100644
--- a/docs/en/cowboy/2.10/manual/cowboy.start_clear/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy.start_clear/index.html
@@ -166,6 +166,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.10/manual/cowboy.start_tls/index.html
index e0250a44..76b12827 100644
--- a/docs/en/cowboy/2.10/manual/cowboy.start_tls/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy.start_tls/index.html
@@ -171,6 +171,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.10/manual/cowboy.stop_listener/index.html
index 84fd3199..636860ed 100644
--- a/docs/en/cowboy/2.10/manual/cowboy.stop_listener/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy.stop_listener/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy/index.html b/docs/en/cowboy/2.10/manual/cowboy/index.html
index 72617b9c..752b63e0 100644
--- a/docs/en/cowboy/2.10/manual/cowboy/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy/index.html
@@ -165,6 +165,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_app/index.html b/docs/en/cowboy/2.10/manual/cowboy_app/index.html
index 55f9411a..142e7d0f 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_app/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_app/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_compress_h/index.html b/docs/en/cowboy/2.10/manual/cowboy_compress_h/index.html
index 49263eb7..3b936e1d 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_compress_h/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_compress_h/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.10/manual/cowboy_constraints.int/index.html
index e67d1316..2c744311 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_constraints.int/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_constraints.int/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.10/manual/cowboy_constraints.nonempty/index.html
index df383007..b558880c 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_constraints.nonempty/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_constraints.nonempty/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.10/manual/cowboy_constraints/index.html
index 8da8569d..d8460268 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_constraints/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_constraints/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.10/manual/cowboy_handler.terminate/index.html
index 382b45ba..63c13f1f 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_handler.terminate/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_handler.terminate/index.html
@@ -143,6 +143,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_handler/index.html b/docs/en/cowboy/2.10/manual/cowboy_handler/index.html
index ac176d16..b674059b 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_handler/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_handler/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_http/index.html b/docs/en/cowboy/2.10/manual/cowboy_http/index.html
index 397aa8bb..96b75bb2 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_http/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_http/index.html
@@ -235,6 +235,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_http2/index.html b/docs/en/cowboy/2.10/manual/cowboy_http2/index.html
index bd50fb4f..de6674fc 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_http2/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_http2/index.html
@@ -269,6 +269,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_loop/index.html b/docs/en/cowboy/2.10/manual/cowboy_loop/index.html
index c350c66a..6bda0033 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_loop/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_loop/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_metrics_h/index.html b/docs/en/cowboy/2.10/manual/cowboy_metrics_h/index.html
index d6187da8..4ccd12f0 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_metrics_h/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_metrics_h/index.html
@@ -226,6 +226,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.10/manual/cowboy_middleware/index.html
index 97cb1ad1..ad0ac95f 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_middleware/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_middleware/index.html
@@ -146,6 +146,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.binding/index.html
index 9f601046..d44cb836 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.binding/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.binding/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.bindings/index.html
index f2e02d97..b6d2c5fd 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.bindings/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.bindings/index.html
@@ -129,6 +129,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 48bf6fec..9e29a997 100644
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+++ b/docs/en/cowboy/2.10/manual/cowboy_req.body_length/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.cast/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.cast/index.html
index 21b030ec..26b03460 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.cast/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.cast/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.cert/index.html
index ea9c46cb..8fc68722 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.cert/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.cert/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.delete_resp_header/index.html
index d9f1d87c..650344cc 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.delete_resp_header/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.delete_resp_header/index.html
@@ -134,6 +134,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.filter_cookies/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.filter_cookies/index.html
index f035224b..58440e9e 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.filter_cookies/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.filter_cookies/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.has_body/index.html
index 0d27179c..7df87bbd 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.has_body/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.has_body/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_body/index.html
index 72c47676..115c606f 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_body/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_body/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_header/index.html
index e585a207..896b84eb 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_header/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.has_resp_header/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.header/index.html
index cd1a5c75..68064f6e 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.header/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.header/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.headers/index.html
index bd8fd528..4a0b1642 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.headers/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.headers/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.host/index.html
index a2fa2679..2eeb3dbc 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.host/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.host/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.host_info/index.html
index adad4eae..6cce12da 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.host_info/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.host_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.inform/index.html
index 8ee8f5a5..bc1b42c9 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.inform/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.inform/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.match_cookies/index.html
index 0f8c3e5d..668e4bfc 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.match_cookies/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.match_cookies/index.html
@@ -157,6 +157,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.match_qs/index.html
index d7de6c68..8ca26cdb 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.match_qs/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.match_qs/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.method/index.html
index 5597cd17..3792446c 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.method/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.method/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.parse_cookies/index.html
index 8d574d99..60d380b0 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.parse_cookies/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.parse_cookies/index.html
@@ -155,6 +155,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.parse_header/index.html
index 9f9e34c5..7661be4d 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.parse_header/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.parse_header/index.html
@@ -363,6 +363,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.parse_qs/index.html
index e9ab7c08..9af89ab0 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.parse_qs/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.parse_qs/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.path/index.html
index c9cec7b8..5cebec0f 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.path/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.path/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.path_info/index.html
index 32804165..9ca9cad1 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.path_info/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.path_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.peer/index.html
index 5b0c5122..b01d83e0 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.peer/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.peer/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.port/index.html
index e699ff73..6e71f5a2 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.port/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.port/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.push/index.html
index f835d94e..1a0fb6a0 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.push/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.push/index.html
@@ -163,6 +163,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.qs/index.html
index e89f5e69..508b0ab1 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.qs/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.qs/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.read_and_match_urlencoded_body/index.html
index a2a222cc..45d811b4 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.read_and_match_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -187,6 +187,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.read_body/index.html
index 66f9987b..0f0d0a78 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.read_body/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.read_body/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.read_part/index.html
index 907fbf97..7a1131d7 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.read_part/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.read_part/index.html
@@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.read_part_body/index.html
index acfedb29..e4e5887b 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.read_part_body/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.read_part_body/index.html
@@ -159,6 +159,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.read_urlencoded_body/index.html
index 655d6152..e692d02c 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.read_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.read_urlencoded_body/index.html
@@ -153,6 +153,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.reply/index.html
index c184ff89..b99b18cc 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.reply/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.reply/index.html
@@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.resp_header/index.html
index 56e5dbee..5de8b7c7 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.resp_header/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.resp_header/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.resp_headers/index.html
index f3335540..13b994c8 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.resp_headers/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.resp_headers/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.scheme/index.html
index bb1176b0..2f007711 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.scheme/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.scheme/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_body/index.html
index d39e1e59..c3717576 100644
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+++ b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_body/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_cookie/index.html
index fe39a811..3d8a66ff 100644
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+++ b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_cookie/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_header/index.html
index e5843c37..417e15b7 100644
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+++ b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_header/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_headers/index.html
index 3b49559f..00933fd7 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_headers/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.set_resp_headers/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.sock/index.html
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--- a/docs/en/cowboy/2.10/manual/cowboy_req.sock/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.sock/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.stream_body/index.html
index cabe21eb..fbb81fd4 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.stream_body/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.stream_body/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.stream_events/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.stream_events/index.html
index 37246049..69c75415 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.stream_events/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.stream_events/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.stream_reply/index.html
index f8384470..8ac18a82 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.stream_reply/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.stream_reply/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.stream_trailers/index.html
index 4f28f2b3..745e031d 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.stream_trailers/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.stream_trailers/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.uri/index.html
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--- a/docs/en/cowboy/2.10/manual/cowboy_req.uri/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.uri/index.html
@@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.10/manual/cowboy_req.version/index.html
index 162df535..b09a1551 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req.version/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req.version/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_req/index.html b/docs/en/cowboy/2.10/manual/cowboy_req/index.html
index dde7056c..ae5f3a17 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_req/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_req/index.html
@@ -317,6 +317,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_rest/index.html b/docs/en/cowboy/2.10/manual/cowboy_rest/index.html
index d2dd636a..aecaf9cb 100644
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+++ b/docs/en/cowboy/2.10/manual/cowboy_rest/index.html
@@ -601,6 +601,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.10/manual/cowboy_router.compile/index.html
index 15325b9a..b494a9ea 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_router.compile/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_router.compile/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_router/index.html b/docs/en/cowboy/2.10/manual/cowboy_router/index.html
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--- a/docs/en/cowboy/2.10/manual/cowboy_router/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_router/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_static/index.html b/docs/en/cowboy/2.10/manual/cowboy_static/index.html
index 28375d4a..14b7ff5d 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_static/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_static/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_stream/index.html b/docs/en/cowboy/2.10/manual/cowboy_stream/index.html
index 4e8d253e..35062abc 100644
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+++ b/docs/en/cowboy/2.10/manual/cowboy_stream/index.html
@@ -372,6 +372,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_stream_h/index.html b/docs/en/cowboy/2.10/manual/cowboy_stream_h/index.html
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--- a/docs/en/cowboy/2.10/manual/cowboy_stream_h/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_stream_h/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_tracer_h/index.html b/docs/en/cowboy/2.10/manual/cowboy_tracer_h/index.html
index 9701cc85..6af6a36b 100644
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+++ b/docs/en/cowboy/2.10/manual/cowboy_tracer_h/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.10/manual/cowboy_websocket/index.html
index 667cbc21..48b50e05 100644
--- a/docs/en/cowboy/2.10/manual/cowboy_websocket/index.html
+++ b/docs/en/cowboy/2.10/manual/cowboy_websocket/index.html
@@ -297,6 +297,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/http_status_codes/index.html b/docs/en/cowboy/2.10/manual/http_status_codes/index.html
index 0442e089..d1968108 100644
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+++ b/docs/en/cowboy/2.10/manual/http_status_codes/index.html
@@ -181,6 +181,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.10/manual/index.html b/docs/en/cowboy/2.10/manual/index.html
index bfc0fed7..6dc4aaf7 100644
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+++ b/docs/en/cowboy/2.10/manual/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index c4d843f4..9c48f5a8 100644
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+++ b/docs/en/cowboy/2.11/guide/constraints/index.html
@@ -197,6 +197,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 7785b19d..4d4799da 100644
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+++ b/docs/en/cowboy/2.11/guide/cookies/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 3addff5b..533b8d46 100644
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+++ b/docs/en/cowboy/2.11/guide/erlang_web/index.html
@@ -163,6 +163,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.11/guide/flow_diagram/index.html
@@ -141,6 +141,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index e3b89280..87b78fca 100644
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+++ b/docs/en/cowboy/2.11/guide/getting_started/index.html
@@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 66ae82b6..fa6d9255 100644
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+++ b/docs/en/cowboy/2.11/guide/handlers/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 611957c4..cb170166 100644
--- a/docs/en/cowboy/2.11/guide/index.html
+++ b/docs/en/cowboy/2.11/guide/index.html
@@ -192,6 +192,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index f96668d9..d4a1112f 100644
--- a/docs/en/cowboy/2.11/guide/introduction/index.html
+++ b/docs/en/cowboy/2.11/guide/introduction/index.html
@@ -151,6 +151,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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--- a/docs/en/cowboy/2.11/guide/listeners/index.html
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@@ -200,6 +200,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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@@ -300,6 +300,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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--- a/docs/en/cowboy/2.11/manual/cowboy.set_env/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy.set_env/index.html
@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.11/manual/cowboy.start_clear/index.html
index 2adfb2ec..1a1f1658 100644
--- a/docs/en/cowboy/2.11/manual/cowboy.start_clear/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy.start_clear/index.html
@@ -166,6 +166,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.11/manual/cowboy.start_tls/index.html
index 6525e96c..4219c515 100644
--- a/docs/en/cowboy/2.11/manual/cowboy.start_tls/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy.start_tls/index.html
@@ -171,6 +171,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.11/manual/cowboy.stop_listener/index.html
index f3dda4e1..5389ca29 100644
--- a/docs/en/cowboy/2.11/manual/cowboy.stop_listener/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy.stop_listener/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy/index.html b/docs/en/cowboy/2.11/manual/cowboy/index.html
index fe134c8f..99a9743a 100644
--- a/docs/en/cowboy/2.11/manual/cowboy/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy/index.html
@@ -167,6 +167,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_app/index.html b/docs/en/cowboy/2.11/manual/cowboy_app/index.html
index 5ee6d309..0fc7f9d5 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_app/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_app/index.html
@@ -178,6 +178,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_compress_h/index.html b/docs/en/cowboy/2.11/manual/cowboy_compress_h/index.html
index 6840b94d..2e4544c5 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_compress_h/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_compress_h/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.11/manual/cowboy_constraints.int/index.html
index f0a3e54f..3804580b 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_constraints.int/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_constraints.int/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.11/manual/cowboy_constraints.nonempty/index.html
index b527a7e4..e668da51 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_constraints.nonempty/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_constraints.nonempty/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.11/manual/cowboy_constraints/index.html
index bcf947b7..597b3312 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_constraints/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_constraints/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_decompress_h/index.html b/docs/en/cowboy/2.11/manual/cowboy_decompress_h/index.html
index 6c2b8703..6b90c812 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_decompress_h/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_decompress_h/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.11/manual/cowboy_handler.terminate/index.html
index 39761d0c..73fc0e7f 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_handler.terminate/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_handler.terminate/index.html
@@ -143,6 +143,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_handler/index.html b/docs/en/cowboy/2.11/manual/cowboy_handler/index.html
index ce6e3dcf..e495268a 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_handler/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_handler/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_http/index.html b/docs/en/cowboy/2.11/manual/cowboy_http/index.html
index 5a8b3133..1b5704f6 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_http/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_http/index.html
@@ -241,6 +241,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_http2/index.html b/docs/en/cowboy/2.11/manual/cowboy_http2/index.html
index aaa20e17..afeaeb10 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_http2/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_http2/index.html
@@ -285,6 +285,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_loop/index.html b/docs/en/cowboy/2.11/manual/cowboy_loop/index.html
index 66cf01f6..9136f5da 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_loop/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_loop/index.html
@@ -151,6 +151,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_metrics_h/index.html b/docs/en/cowboy/2.11/manual/cowboy_metrics_h/index.html
index 8e90ed57..3a9d693f 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_metrics_h/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_metrics_h/index.html
@@ -226,6 +226,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.11/manual/cowboy_middleware/index.html
index 031e0d7b..55142afd 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_middleware/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_middleware/index.html
@@ -146,6 +146,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.binding/index.html
index bab69d2a..f71106d7 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.binding/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.binding/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.bindings/index.html
index d52dd575..c0858df8 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.bindings/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.bindings/index.html
@@ -129,6 +129,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.body_length/index.html
index 6d7a9831..2a2a951d 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.body_length/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.body_length/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.cast/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.cast/index.html
index e14adcb0..ab91a253 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.cast/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.cast/index.html
@@ -158,6 +158,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.cert/index.html
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--- a/docs/en/cowboy/2.11/manual/cowboy_req.cert/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.cert/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.delete_resp_header/index.html
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--- a/docs/en/cowboy/2.11/manual/cowboy_req.delete_resp_header/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.delete_resp_header/index.html
@@ -134,6 +134,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.filter_cookies/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.filter_cookies/index.html
index 884fb653..14137328 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.filter_cookies/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.filter_cookies/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.has_body/index.html
index 34a808ee..63fd2ce6 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.has_body/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.has_body/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_body/index.html
index 428f4016..202fa286 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_body/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_body/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_header/index.html
index 1aa21fc5..13fd5952 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_header/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.has_resp_header/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.header/index.html
index ce93deff..764ff31a 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.header/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.header/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.headers/index.html
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--- a/docs/en/cowboy/2.11/manual/cowboy_req.headers/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.headers/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.host/index.html
index 8cc9b670..021336c4 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.host/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.host/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.host_info/index.html
index 2e041642..68d07f5d 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.host_info/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.host_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.inform/index.html
index ba49841e..a42727b3 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.inform/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.inform/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.match_cookies/index.html
index 36d865d8..15cb2646 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.match_cookies/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.match_cookies/index.html
@@ -157,6 +157,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.match_qs/index.html
index 29fc248e..e98e9d2a 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.match_qs/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.match_qs/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.method/index.html
index ebe0439a..390d9308 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.method/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.method/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.parse_cookies/index.html
index 88b7f986..e358faa7 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.parse_cookies/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.parse_cookies/index.html
@@ -155,6 +155,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.parse_header/index.html
index ed0b1392..1e9655cb 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.parse_header/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.parse_header/index.html
@@ -363,6 +363,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.parse_qs/index.html
index ed77cf01..17784bcf 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.parse_qs/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.parse_qs/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.path/index.html
index ebe41fb2..d4a4ea5d 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.path/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.path/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.path_info/index.html
index 3ed412fa..4ae54c5c 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.path_info/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.path_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.peer/index.html
index bc02a5bb..91851708 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.peer/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.peer/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.port/index.html
index ecee0fe8..c42ccc96 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.port/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.port/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.push/index.html
index 5b87c050..485dd7a3 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.push/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.push/index.html
@@ -163,6 +163,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.qs/index.html
index 2a91f83f..dad81ce4 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.qs/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.qs/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.read_and_match_urlencoded_body/index.html
index 442b671b..2be04499 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.read_and_match_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -187,6 +187,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.read_body/index.html
index 05f8fafa..249285fa 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.read_body/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.read_body/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.read_part/index.html
index 38d015c8..5adae65e 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.read_part/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.read_part/index.html
@@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.read_part_body/index.html
index fc2752c0..78d1a4e5 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.read_part_body/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.read_part_body/index.html
@@ -159,6 +159,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.read_urlencoded_body/index.html
index c7b34054..4eae0926 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.read_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.read_urlencoded_body/index.html
@@ -153,6 +153,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.reply/index.html
index 28c5f3d9..c1cf4755 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.reply/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.reply/index.html
@@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.resp_header/index.html
index c99b96a7..2c9f6789 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.resp_header/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.resp_header/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.resp_headers/index.html
index fb129123..7265f038 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.resp_headers/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.resp_headers/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.scheme/index.html
index 1a554e95..dbc66460 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.scheme/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.scheme/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/index.html
index 1c15622c..2b9278e6 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_cookie/index.html
index 4457f17d..503e1f01 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_cookie/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_cookie/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_header/index.html
index 7705081e..44a74b0d 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_header/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_header/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_headers/index.html
index c7e1ac4f..ae14309a 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_headers/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_headers/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.sock/index.html
index 857b2808..0981e563 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.sock/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.sock/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 4dba25b1..ee90b88a 100644
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+++ b/docs/en/cowboy/2.11/manual/cowboy_req.stream_body/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.stream_events/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.stream_events/index.html
index 88b9c07f..d90fe89a 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.stream_events/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.stream_events/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.stream_reply/index.html
index 22435304..fe5a9ea6 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.stream_reply/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.stream_reply/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.stream_trailers/index.html
index 6fcbbf0e..e86b813e 100644
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+++ b/docs/en/cowboy/2.11/manual/cowboy_req.stream_trailers/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.uri/index.html
index 988ed702..0d8895ce 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.uri/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.uri/index.html
@@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.11/manual/cowboy_req.version/index.html
index ed195e9d..abcad801 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_req.version/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req.version/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_req/index.html b/docs/en/cowboy/2.11/manual/cowboy_req/index.html
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--- a/docs/en/cowboy/2.11/manual/cowboy_req/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_req/index.html
@@ -318,6 +318,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_rest/index.html b/docs/en/cowboy/2.11/manual/cowboy_rest/index.html
index 1644753d..07c79ed5 100644
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+++ b/docs/en/cowboy/2.11/manual/cowboy_rest/index.html
@@ -677,6 +677,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
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index d89403e7..ebcf3780 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_router.compile/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_router.compile/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_router/index.html b/docs/en/cowboy/2.11/manual/cowboy_router/index.html
index 6c479b4f..d1346f9f 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_router/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_router/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.11/manual/cowboy_static/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_stream.data/index.html b/docs/en/cowboy/2.11/manual/cowboy_stream.data/index.html
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--- a/docs/en/cowboy/2.11/manual/cowboy_stream.data/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_stream.data/index.html
@@ -151,6 +151,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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--- a/docs/en/cowboy/2.11/manual/cowboy_stream.early_error/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_stream.early_error/index.html
@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 481a5897..d278058a 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_stream.info/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_stream.info/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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--- a/docs/en/cowboy/2.11/manual/cowboy_stream.init/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_stream.init/index.html
@@ -151,6 +151,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_stream.terminate/index.html b/docs/en/cowboy/2.11/manual/cowboy_stream.terminate/index.html
index 262a04d4..ed0fe5ef 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_stream.terminate/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_stream.terminate/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_stream/index.html b/docs/en/cowboy/2.11/manual/cowboy_stream/index.html
index e142a318..594be5f2 100644
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+++ b/docs/en/cowboy/2.11/manual/cowboy_stream/index.html
@@ -374,6 +374,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_stream_h/index.html b/docs/en/cowboy/2.11/manual/cowboy_stream_h/index.html
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--- a/docs/en/cowboy/2.11/manual/cowboy_stream_h/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_stream_h/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.11/manual/cowboy_tracer_h/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.11/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.11/manual/cowboy_websocket/index.html
index d441088b..1ee4b249 100644
--- a/docs/en/cowboy/2.11/manual/cowboy_websocket/index.html
+++ b/docs/en/cowboy/2.11/manual/cowboy_websocket/index.html
@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 001d1eea..fe59b03c 100644
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+++ b/docs/en/cowboy/2.11/manual/http_status_codes/index.html
@@ -181,6 +181,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 0e4b125e..11a66192 100644
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+++ b/docs/en/cowboy/2.11/manual/index.html
@@ -178,6 +178,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 7459af12..cdd3ad09 100644
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+++ b/docs/en/cowboy/2.12/guide/constraints/index.html
@@ -197,6 +197,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.12/guide/cookies/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.12/guide/erlang_web/index.html
@@ -163,6 +163,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.12/guide/flow_diagram/index.html
@@ -141,6 +141,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 201ac672..245c0f0b 100644
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+++ b/docs/en/cowboy/2.12/guide/getting_started/index.html
@@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.12/guide/handlers/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 06ed2ceb..ba7dd4cd 100644
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+++ b/docs/en/cowboy/2.12/guide/index.html
@@ -194,6 +194,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 4f27b7e0..a05b79df 100644
--- a/docs/en/cowboy/2.12/guide/introduction/index.html
+++ b/docs/en/cowboy/2.12/guide/introduction/index.html
@@ -151,6 +151,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.12/guide/listeners/index.html
@@ -181,6 +181,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -200,6 +200,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -149,6 +149,8 @@
 	
 	
 	
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@@ -231,6 +231,8 @@
 	
 	
 	
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@@ -166,6 +166,8 @@
 	
 	
 	
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@@ -177,6 +177,8 @@
 	
 	
 	
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@@ -181,6 +181,8 @@
 	
 	
 	
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@@ -149,6 +149,8 @@
 	
 	
 	
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@@ -151,6 +151,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.12/guide/migrating_from_2.4/index.html
@@ -179,6 +179,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.12/guide/migrating_from_2.6/index.html
@@ -215,6 +215,8 @@
 	
 	
 	
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@@ -171,6 +171,8 @@
 	
 	
 	
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@@ -146,6 +146,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.12/guide/modern_web/index.html
@@ -145,6 +145,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -123,6 +123,8 @@
 	
 	
 	
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+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -217,6 +217,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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@@ -180,6 +180,8 @@
 	
 	
 	
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@@ -177,6 +177,8 @@
 	
 	
 	
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@@ -300,6 +300,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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+	
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@@ -149,6 +149,8 @@
 	
 	
 	
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@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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+++ b/docs/en/cowboy/2.12/manual/cowboy.get_env/index.html
@@ -145,6 +145,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.12/manual/cowboy.set_env/index.html
index 843736d6..99d631dc 100644
--- a/docs/en/cowboy/2.12/manual/cowboy.set_env/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy.set_env/index.html
@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.12/manual/cowboy.start_clear/index.html
index 37f4f4a9..f7f37419 100644
--- a/docs/en/cowboy/2.12/manual/cowboy.start_clear/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy.start_clear/index.html
@@ -166,6 +166,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.12/manual/cowboy.start_tls/index.html
index 21e42a20..a0c93dd2 100644
--- a/docs/en/cowboy/2.12/manual/cowboy.start_tls/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy.start_tls/index.html
@@ -171,6 +171,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.12/manual/cowboy.stop_listener/index.html
index d40c29c3..fb6c37b4 100644
--- a/docs/en/cowboy/2.12/manual/cowboy.stop_listener/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy.stop_listener/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy/index.html b/docs/en/cowboy/2.12/manual/cowboy/index.html
index ee582449..7bcfe6d1 100644
--- a/docs/en/cowboy/2.12/manual/cowboy/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy/index.html
@@ -167,6 +167,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_app/index.html b/docs/en/cowboy/2.12/manual/cowboy_app/index.html
index 0dd594b6..6b7380e8 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_app/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_app/index.html
@@ -178,6 +178,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_compress_h/index.html b/docs/en/cowboy/2.12/manual/cowboy_compress_h/index.html
index dab59f73..878ce19c 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_compress_h/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_compress_h/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.12/manual/cowboy_constraints.int/index.html
index 86554db3..f033cd48 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_constraints.int/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_constraints.int/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.12/manual/cowboy_constraints.nonempty/index.html
index 4b830846..0c4d9ebd 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_constraints.nonempty/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_constraints.nonempty/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.12/manual/cowboy_constraints/index.html
index 2136b0da..ca5257fe 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_constraints/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_constraints/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_decompress_h/index.html b/docs/en/cowboy/2.12/manual/cowboy_decompress_h/index.html
index 2a181db9..08d2281c 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_decompress_h/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_decompress_h/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.12/manual/cowboy_handler.terminate/index.html
index f33532f3..47ec3011 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_handler.terminate/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_handler.terminate/index.html
@@ -143,6 +143,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_handler/index.html b/docs/en/cowboy/2.12/manual/cowboy_handler/index.html
index 3d7ecf2c..205823f0 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_handler/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_handler/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_http/index.html b/docs/en/cowboy/2.12/manual/cowboy_http/index.html
index 86827290..e5fbaae3 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_http/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_http/index.html
@@ -241,6 +241,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_http2/index.html b/docs/en/cowboy/2.12/manual/cowboy_http2/index.html
index de9db0f3..70a240b9 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_http2/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_http2/index.html
@@ -289,6 +289,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_loop/index.html b/docs/en/cowboy/2.12/manual/cowboy_loop/index.html
index 233da481..a26fd59f 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_loop/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_loop/index.html
@@ -151,6 +151,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_metrics_h/index.html b/docs/en/cowboy/2.12/manual/cowboy_metrics_h/index.html
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--- a/docs/en/cowboy/2.12/manual/cowboy_metrics_h/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_metrics_h/index.html
@@ -226,6 +226,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.12/manual/cowboy_middleware/index.html
index 52071bd9..db76ab18 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_middleware/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_middleware/index.html
@@ -146,6 +146,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.binding/index.html
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--- a/docs/en/cowboy/2.12/manual/cowboy_req.binding/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.binding/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.bindings/index.html
index 856ab737..bdec0b35 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.bindings/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.bindings/index.html
@@ -129,6 +129,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.body_length/index.html
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--- a/docs/en/cowboy/2.12/manual/cowboy_req.body_length/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.body_length/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.cast/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.cast/index.html
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--- a/docs/en/cowboy/2.12/manual/cowboy_req.cast/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.cast/index.html
@@ -158,6 +158,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.cert/index.html
index 33e5cf75..90938973 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.cert/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.cert/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.delete_resp_header/index.html
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+++ b/docs/en/cowboy/2.12/manual/cowboy_req.delete_resp_header/index.html
@@ -134,6 +134,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.filter_cookies/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.filter_cookies/index.html
index 8debae92..5de739ea 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.filter_cookies/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.filter_cookies/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.has_body/index.html
index 46d6c5b7..588ea8f9 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.has_body/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.has_body/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_body/index.html
index b404eab6..25d2ba69 100644
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+++ b/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_body/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_header/index.html
index 67a2897c..d04cb7a9 100644
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+++ b/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_header/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.header/index.html
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--- a/docs/en/cowboy/2.12/manual/cowboy_req.header/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.header/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.headers/index.html
index f6e33e2b..fcc10470 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.headers/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.headers/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.host/index.html
index 9dee6815..ec089466 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.host/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.host/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.host_info/index.html
index dcc1109c..44aa7144 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.host_info/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.host_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.inform/index.html
index e861dde9..b047cd93 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.inform/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.inform/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.match_cookies/index.html
index 69fe6524..389ed0c8 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.match_cookies/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.match_cookies/index.html
@@ -157,6 +157,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.match_qs/index.html
index d330c406..78226fff 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.match_qs/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.match_qs/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.method/index.html
index 44273e5b..41e6eaea 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.method/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.method/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.parse_cookies/index.html
index add9a948..3b3a187e 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.parse_cookies/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.parse_cookies/index.html
@@ -155,6 +155,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.parse_header/index.html
index d65d761d..38aeef91 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.parse_header/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.parse_header/index.html
@@ -363,6 +363,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.parse_qs/index.html
index fc7dc78c..a88690f4 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.parse_qs/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.parse_qs/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.path/index.html
index 2a3381be..b2f141b7 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.path/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.path/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.path_info/index.html
index 1c58b41c..d9e252df 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.path_info/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.path_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.peer/index.html
index 25677e7a..fbf279ee 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.peer/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.peer/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.port/index.html
index 2ec0d720..358e5fa1 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.port/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.port/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.push/index.html
index a2424dbc..54428aba 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.push/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.push/index.html
@@ -163,6 +163,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.qs/index.html
index a2f885b8..cbd4b16a 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.qs/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.qs/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.read_and_match_urlencoded_body/index.html
index 7cb66b28..a9d11322 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.read_and_match_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -187,6 +187,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.read_body/index.html
index 5221037a..98e5d4f7 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.read_body/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.read_body/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.read_part/index.html
index eb21ba5b..aee5bc59 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.read_part/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.read_part/index.html
@@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.read_part_body/index.html
index 594b27bd..677f65ec 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.read_part_body/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.read_part_body/index.html
@@ -159,6 +159,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.read_urlencoded_body/index.html
index 6eaae94b..8ef4a718 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.read_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.read_urlencoded_body/index.html
@@ -153,6 +153,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.reply/index.html
index 18d9f53c..64b99fd4 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.reply/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.reply/index.html
@@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.resp_header/index.html
index 0daccba2..999fe096 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.resp_header/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.resp_header/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.resp_headers/index.html
index 55054a75..2c8e9920 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.resp_headers/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.resp_headers/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.scheme/index.html
index e5aa6dad..00fa87af 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.scheme/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.scheme/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/index.html
index 89b416a6..24859216 100644
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+++ b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_cookie/index.html
index 04a613c0..59ea7ca4 100644
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+++ b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_cookie/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_header/index.html
index 021e8917..fb17f3ba 100644
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+++ b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_header/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_headers/index.html
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+++ b/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_headers/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.sock/index.html
index 222240f0..51387285 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.sock/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.sock/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.stream_body/index.html
index 109102cb..ed01ee10 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.stream_body/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.stream_body/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.stream_events/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.stream_events/index.html
index 9aeccddf..bf447ea2 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.stream_events/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.stream_events/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.stream_reply/index.html
index abca2016..da055d4d 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.stream_reply/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.stream_reply/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.stream_trailers/index.html
index 4ff6b368..fa3d171c 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.stream_trailers/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.stream_trailers/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.uri/index.html
index fe904cba..c3459013 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.uri/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.uri/index.html
@@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.12/manual/cowboy_req.version/index.html
index 8d1084d8..187f110b 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req.version/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req.version/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_req/index.html b/docs/en/cowboy/2.12/manual/cowboy_req/index.html
index c1aab295..c19a74bf 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_req/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_req/index.html
@@ -318,6 +318,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_rest/index.html b/docs/en/cowboy/2.12/manual/cowboy_rest/index.html
index 42dd6b06..4303420c 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_rest/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_rest/index.html
@@ -677,6 +677,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.12/manual/cowboy_router.compile/index.html
index d9f89c7d..62b13911 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_router.compile/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_router.compile/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_router/index.html b/docs/en/cowboy/2.12/manual/cowboy_router/index.html
index d8a4cfda..71ca96e4 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_router/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_router/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_static/index.html b/docs/en/cowboy/2.12/manual/cowboy_static/index.html
index 9066460e..48d1cf8e 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_static/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_static/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_stream.data/index.html b/docs/en/cowboy/2.12/manual/cowboy_stream.data/index.html
index 9f67d389..8550de70 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_stream.data/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_stream.data/index.html
@@ -151,6 +151,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_stream.early_error/index.html b/docs/en/cowboy/2.12/manual/cowboy_stream.early_error/index.html
index 9bd9ef1b..2edc018b 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_stream.early_error/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_stream.early_error/index.html
@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_stream.info/index.html b/docs/en/cowboy/2.12/manual/cowboy_stream.info/index.html
index e278262f..f74ab0d9 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_stream.info/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_stream.info/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_stream.init/index.html b/docs/en/cowboy/2.12/manual/cowboy_stream.init/index.html
index a9f08304..8c5c30eb 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_stream.init/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_stream.init/index.html
@@ -151,6 +151,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_stream.terminate/index.html b/docs/en/cowboy/2.12/manual/cowboy_stream.terminate/index.html
index 54e8496c..ccb1c51a 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_stream.terminate/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_stream.terminate/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_stream/index.html b/docs/en/cowboy/2.12/manual/cowboy_stream/index.html
index 64d6fa64..0eebb7a0 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_stream/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_stream/index.html
@@ -374,6 +374,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_stream_h/index.html b/docs/en/cowboy/2.12/manual/cowboy_stream_h/index.html
index 30655abe..0badd8fa 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_stream_h/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_stream_h/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_tracer_h/index.html b/docs/en/cowboy/2.12/manual/cowboy_tracer_h/index.html
index ed82b0e6..5f18fcad 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_tracer_h/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_tracer_h/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.12/manual/cowboy_websocket/index.html
index a12f3183..fb8d4400 100644
--- a/docs/en/cowboy/2.12/manual/cowboy_websocket/index.html
+++ b/docs/en/cowboy/2.12/manual/cowboy_websocket/index.html
@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/http_status_codes/index.html b/docs/en/cowboy/2.12/manual/http_status_codes/index.html
index 9e904cd3..03948853 100644
--- a/docs/en/cowboy/2.12/manual/http_status_codes/index.html
+++ b/docs/en/cowboy/2.12/manual/http_status_codes/index.html
@@ -181,6 +181,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.12/manual/index.html b/docs/en/cowboy/2.12/manual/index.html
index 17546b27..852bfdab 100644
--- a/docs/en/cowboy/2.12/manual/index.html
+++ b/docs/en/cowboy/2.12/manual/index.html
@@ -178,6 +178,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.13/guide/constraints.asciidoc b/docs/en/cowboy/2.13/guide/constraints.asciidoc
new file mode 100644
index 00000000..4eade8ae
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/constraints.asciidoc
@@ -0,0 +1,128 @@
+[[constraints]]
+== Constraints
+
+Constraints are validation and conversion functions applied
+to user input.
+
+They are used in various places in Cowboy, including the
+router and the `cowboy_req` match functions.
+
+=== Syntax
+
+Constraints are provided as a list of fields. For each field
+in the list, specific constraints can be applied, as well as
+a default value if the field is missing.
+
+A field can take the form of an atom `field`, a tuple with
+constraints `{field, Constraints}` or a tuple with constraints
+and a default value `{field, Constraints, Default}`.
+The `field` form indicates the field is mandatory.
+
+Note that when used with the router, only the second form
+makes sense, as it does not use the default and the field
+is always defined.
+
+Constraints for each field are provided as an ordered list
+of atoms or funs to apply. Built-in constraints are provided
+as atoms, while custom constraints are provided as funs.
+
+When multiple constraints are provided, they are applied in
+the order given. If the value has been modified by a constraint
+then the next one receives the new value.
+
+For example, the following constraints will first validate
+and convert the field `my_value` to an integer, and then
+check that the integer is positive:
+
+[source,erlang]
+----
+PositiveFun = fun
+    (_, V) when V > 0 ->
+        {ok, V};
+    (_, _) ->
+        {error, not_positive}
+end,
+{my_value, [int, PositiveFun]}.
+----
+
+We ignore the first fun argument in this snippet. We shouldn't.
+We will simply learn what it is later in this chapter.
+
+When there's only one constraint, it can be provided directly
+without wrapping it into a list:
+
+[source,erlang]
+----
+{my_value, int}
+----
+
+=== Built-in constraints
+
+Built-in constraints are specified as an atom:
+
+[cols="<,<",options="header"]
+|===
+| Constraint | Description
+| int        | Converts binary value to integer.
+| nonempty   | Ensures the binary value is non-empty.
+|===
+
+=== Custom constraints
+
+Custom constraints are specified as a fun. This fun takes
+two arguments. The first argument indicates the operation
+to be performed, and the second is the value. What the
+value is and what must be returned depends on the operation.
+
+Cowboy currently defines three operations. The operation
+used for validating and converting user input is the `forward`
+operation.
+
+[source,erlang]
+----
+int(forward, Value) ->
+    try
+        {ok, binary_to_integer(Value)}
+    catch _:_ ->
+        {error, not_an_integer}
+    end;
+----
+
+The value must be returned even if it is not converted
+by the constraint.
+
+The two other operations are currently experimental. They are
+meant to help implement HATEOAS type services, but proper
+support for HATEOAS is not expected to be available before
+Cowboy 3.0 because of Cowboy's current router's limitations.
+
+The `reverse` operation does the opposite: it
+takes a converted value and changes it back to what the
+user input would have been.
+
+[source,erlang]
+----
+int(reverse, Value) ->
+	try
+		{ok, integer_to_binary(Value)}
+	catch _:_ ->
+		{error, not_an_integer}
+	end;
+----
+
+Finally, the `format_error` operation takes an error
+returned by any other operation and returns a formatted
+human-readable error message.
+
+[source,erlang]
+----
+int(format_error, {not_an_integer, Value}) ->
+	io_lib:format("The value ~p is not an integer.", [Value]).
+----
+
+Notice that for this case you get both the error and
+the value that was given to the constraint that produced
+this error.
+
+Cowboy will not catch exceptions coming from constraint
+functions. They should be written to not emit any exceptions.
diff --git a/docs/en/cowboy/2.13/guide/constraints/index.html b/docs/en/cowboy/2.13/guide/constraints/index.html
new file mode 100644
index 00000000..424064d0
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/constraints/index.html
@@ -0,0 +1,264 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Constraints</title>
+
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+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
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+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Constraints</span></h1>
+
+<p>Constraints are validation and conversion functions applied to user input.</p>
+<p>They are used in various places in Cowboy, including the router and the <code>cowboy_req</code> match functions.</p>
+<h2 id="_syntax">Syntax</h2>
+<p>Constraints are provided as a list of fields. For each field in the list, specific constraints can be applied, as well as a default value if the field is missing.</p>
+<p>A field can take the form of an atom <code>field</code>, a tuple with constraints <code>{field, Constraints}</code> or a tuple with constraints and a default value <code>{field, Constraints, Default}</code>. The <code>field</code> form indicates the field is mandatory.</p>
+<p>Note that when used with the router, only the second form makes sense, as it does not use the default and the field is always defined.</p>
+<p>Constraints for each field are provided as an ordered list of atoms or funs to apply. Built-in constraints are provided as atoms, while custom constraints are provided as funs.</p>
+<p>When multiple constraints are provided, they are applied in the order given. If the value has been modified by a constraint then the next one receives the new value.</p>
+<p>For example, the following constraints will first validate and convert the field <code>my_value</code> to an integer, and then check that the integer is positive:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PositiveFun</font> <font color="#990000">=</font> <b><font color="#0000FF">fun</font></b>
+    (<font color="#990000">_</font>, <font color="#009900">V</font>) <b><font color="#0000FF">when</font></b> <font color="#009900">V</font> <font color="#990000">&gt;</font> <font color="#993399">0</font> <font color="#990000">-&gt;</font>
+        {<font color="#FF6600">ok</font>, <font color="#009900">V</font>};
+    (<font color="#990000">_</font>, <font color="#990000">_</font>) <font color="#990000">-&gt;</font>
+        {<font color="#FF6600">error</font>, <font color="#FF6600">not_positive</font>}
+<b><font color="#0000FF">end</font></b>,
+{<font color="#FF6600">my_value</font>, [<font color="#FF6600">int</font>, <font color="#009900">PositiveFun</font>]}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>We ignore the first fun argument in this snippet. We shouldn&apos;t. We will simply learn what it is later in this chapter.</p>
+<p>When there&apos;s only one constraint, it can be provided directly without wrapping it into a list:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">my_value</font>, <font color="#FF6600">int</font>}</tt></pre>
+</div></div>
+<h2 id="_built_in_constraints">Built-in constraints</h2>
+<p>Built-in constraints are specified as an atom:</p>
+<table rules="all" width="100%" frame="border"
+			cellspacing="0" cellpadding="4">
+<thead><tr><th>Constraint</th>
+<th>Description</th>
+</tr></thead><tbody><tr><td>int</td>
+<td>Converts binary value to integer.</td>
+</tr>
+<tr><td>nonempty</td>
+<td>Ensures the binary value is non-empty.</td>
+</tr>
+</tbody></table>
+<h2 id="_custom_constraints">Custom constraints</h2>
+<p>Custom constraints are specified as a fun. This fun takes two arguments. The first argument indicates the operation to be performed, and the second is the value. What the value is and what must be returned depends on the operation.</p>
+<p>Cowboy currently defines three operations. The operation used for validating and converting user input is the <code>forward</code> operation.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">int</font></b>(<font color="#FF6600">forward</font>, <font color="#009900">Value</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">try</font></b>
+        {<font color="#FF6600">ok</font>, <b><font color="#000000">binary_to_integer</font></b>(<font color="#009900">Value</font>)}
+    <b><font color="#0000FF">catch</font></b> <font color="#990000">_:_</font> <font color="#990000">-&gt;</font>
+        {<font color="#FF6600">error</font>, <font color="#FF6600">not_an_integer</font>}
+    <b><font color="#0000FF">end</font></b>;</tt></pre>
+</div></div>
+<p>The value must be returned even if it is not converted by the constraint.</p>
+<p>The two other operations are currently experimental. They are meant to help implement HATEOAS type services, but proper support for HATEOAS is not expected to be available before Cowboy 3.0 because of Cowboy&apos;s current router&apos;s limitations.</p>
+<p>The <code>reverse</code> operation does the opposite: it takes a converted value and changes it back to what the user input would have been.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">int</font></b>(<font color="#FF6600">reverse</font>, <font color="#009900">Value</font>) <font color="#990000">-&gt;</font>
+	<b><font color="#0000FF">try</font></b>
+		{<font color="#FF6600">ok</font>, <b><font color="#000000">integer_to_binary</font></b>(<font color="#009900">Value</font>)}
+	<b><font color="#0000FF">catch</font></b> <font color="#990000">_:_</font> <font color="#990000">-&gt;</font>
+		{<font color="#FF6600">error</font>, <font color="#FF6600">not_an_integer</font>}
+	<b><font color="#0000FF">end</font></b>;</tt></pre>
+</div></div>
+<p>Finally, the <code>format_error</code> operation takes an error returned by any other operation and returns a formatted human-readable error message.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">int</font></b>(<font color="#FF6600">format_error</font>, {<font color="#FF6600">not_an_integer</font>, <font color="#009900">Value</font>}) <font color="#990000">-&gt;</font>
+	<b><font color="#000000">io_lib:format</font></b>(<font color="#FF0000">"The value ~p is not an integer."</font>, [<font color="#009900">Value</font>])<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Notice that for this case you get both the error and the value that was given to the constraint that produced this error.</p>
+<p>Cowboy will not catch exceptions coming from constraint functions. They should be written to not emit any exceptions.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/routing/">
+					Routing
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/handlers/">
+					Handlers
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
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+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
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+</div>
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+
+      <footer>
+        <div class="container">
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+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
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+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
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+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/cookies.asciidoc b/docs/en/cowboy/2.13/guide/cookies.asciidoc
new file mode 100644
index 00000000..4825031b
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/cookies.asciidoc
@@ -0,0 +1,139 @@
+[[cookies]]
+== Using cookies
+
+Cookies are a mechanism allowing applications to maintain
+state on top of the stateless HTTP protocol.
+
+Cookies are a name/value store where the names and values are
+stored in plain text. They expire either after a delay
+or when the browser closes. They can be configured on a
+specific domain name or path, and restricted to secure
+resources (sent or downloaded over HTTPS), or restricted
+to the server (disallowing access from client-side scripts).
+
+Cookie names are de facto case sensitive.
+
+Cookies are stored client-side and sent with every subsequent
+request that matches the domain and path for which they were
+stored, until they expire. This can create a non-negligible
+cost.
+
+Cookies should not be considered secure. They are stored on
+the user's computer in plain text, and can be read by any
+program. They can also be read by proxies when using clear
+connections. Always validate the value before using it,
+and never store any sensitive information inside it.
+
+Cookies set by the server are only available in requests
+following the client reception of the response containing
+them.
+
+Cookies may be sent repeatedly. This is often useful to
+update the expiration time and avoid losing a cookie.
+
+=== Setting cookies
+
+By default cookies are defined for the duration of the session:
+
+[source,erlang]
+----
+SessionID = generate_session_id(),
+Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, Req0).
+----
+
+They can also be set for a duration in seconds:
+
+[source,erlang]
+----
+SessionID = generate_session_id(),
+Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, Req0,
+    #{max_age => 3600}).
+----
+
+To delete cookies, set `max_age` to 0:
+
+[source,erlang]
+----
+SessionID = generate_session_id(),
+Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, Req0,
+    #{max_age => 0}).
+----
+
+To restrict cookies to a specific domain and path, the options
+of the same name can be used:
+
+[source,erlang]
+----
+Req = cowboy_req:set_resp_cookie(<<"inaccount">>, <<"1">>, Req0,
+    #{domain => "my.example.org", path => "/account"}).
+----
+
+Cookies will be sent with requests to this domain and all
+its subdomains, and to resources on this path or deeper
+in the path hierarchy.
+
+To restrict cookies to secure channels (typically resources
+available over HTTPS):
+
+[source,erlang]
+----
+SessionID = generate_session_id(),
+Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, Req0,
+    #{secure => true}).
+----
+
+To prevent client-side scripts from accessing a cookie:
+
+[source,erlang]
+----
+SessionID = generate_session_id(),
+Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, Req0,
+    #{http_only => true}).
+----
+
+Cookies may also be set client-side, for example using
+Javascript.
+
+=== Reading cookies
+
+The client only ever sends back the cookie name and value.
+All other options that can be set are never sent back.
+
+Cowboy provides two functions for reading cookies. Both
+involve parsing the cookie header(s) and so should not
+be called repeatedly.
+
+You can get all cookies as a key/value list:
+
+[source,erlang]
+Cookies = cowboy_req:parse_cookies(Req),
+{_, Lang} = lists:keyfind(<<"lang">>, 1, Cookies).
+
+Or you can perform a match against cookies and retrieve
+only the ones you need, while at the same time doing
+any required post processing using xref:constraints[constraints].
+This function returns a map:
+
+[source,erlang]
+#{id := ID, lang := Lang} = cowboy_req:match_cookies([id, lang], Req).
+
+You can use constraints to validate the values while matching
+them. The following snippet will crash if the `id` cookie is
+not an integer number or if the `lang` cookie is empty. Additionally
+the `id` cookie value will be converted to an integer term:
+
+[source,erlang]
+CookiesMap = cowboy_req:match_cookies([{id, int}, {lang, nonempty}], Req).
+
+Note that if two cookies share the same name, then the map value
+will be a list of the two cookie values.
+
+A default value can be provided. The default will be used
+if the `lang` cookie is not found. It will not be used if
+the cookie is found but has an empty value:
+
+[source,erlang]
+#{lang := Lang} = cowboy_req:match_cookies([{lang, [], <<"en-US">>}], Req).
+
+If no default is provided and the value is missing, an
+exception is thrown.
diff --git a/docs/en/cowboy/2.13/guide/cookies/index.html b/docs/en/cowboy/2.13/guide/cookies/index.html
new file mode 100644
index 00000000..222cdc7d
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/cookies/index.html
@@ -0,0 +1,280 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Using cookies</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Using cookies</span></h1>
+
+<p>Cookies are a mechanism allowing applications to maintain state on top of the stateless HTTP protocol.</p>
+<p>Cookies are a name/value store where the names and values are stored in plain text. They expire either after a delay or when the browser closes. They can be configured on a specific domain name or path, and restricted to secure resources (sent or downloaded over HTTPS), or restricted to the server (disallowing access from client-side scripts).</p>
+<p>Cookie names are de facto case sensitive.</p>
+<p>Cookies are stored client-side and sent with every subsequent request that matches the domain and path for which they were stored, until they expire. This can create a non-negligible cost.</p>
+<p>Cookies should not be considered secure. They are stored on the user&apos;s computer in plain text, and can be read by any program. They can also be read by proxies when using clear connections. Always validate the value before using it, and never store any sensitive information inside it.</p>
+<p>Cookies set by the server are only available in requests following the client reception of the response containing them.</p>
+<p>Cookies may be sent repeatedly. This is often useful to update the expiration time and avoid losing a cookie.</p>
+<h2 id="_setting_cookies">Setting cookies</h2>
+<p>By default cookies are defined for the duration of the session:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">generate_session_id</font></b>(),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>They can also be set for a duration in seconds:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">generate_session_id</font></b>(),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>, <font color="#009900">Req0</font>,
+    #{<font color="#0000FF">max_age</font> <font color="#990000">=&gt;</font> <font color="#993399">3600</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>To delete cookies, set <code>max_age</code> to 0:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">generate_session_id</font></b>(),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>, <font color="#009900">Req0</font>,
+    #{<font color="#0000FF">max_age</font> <font color="#990000">=&gt;</font> <font color="#993399">0</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>To restrict cookies to a specific domain and path, the options of the same name can be used:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"inaccount"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"1"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>,
+    #{<font color="#0000FF">domain</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"my.example.org"</font>, <font color="#0000FF">path</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"/account"</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cookies will be sent with requests to this domain and all its subdomains, and to resources on this path or deeper in the path hierarchy.</p>
+<p>To restrict cookies to secure channels (typically resources available over HTTPS):</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">generate_session_id</font></b>(),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>, <font color="#009900">Req0</font>,
+    #{<font color="#0000FF">secure</font> <font color="#990000">=&gt;</font> <font color="#000080">true</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>To prevent client-side scripts from accessing a cookie:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">generate_session_id</font></b>(),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>, <font color="#009900">Req0</font>,
+    #{<font color="#0000FF">http_only</font> <font color="#990000">=&gt;</font> <font color="#000080">true</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cookies may also be set client-side, for example using Javascript.</p>
+<h2 id="_reading_cookies">Reading cookies</h2>
+<p>The client only ever sends back the cookie name and value. All other options that can be set are never sent back.</p>
+<p>Cowboy provides two functions for reading cookies. Both involve parsing the cookie header(s) and so should not be called repeatedly.</p>
+<p>You can get all cookies as a key/value list:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Cookies</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_cookies</font></b>(<font color="#009900">Req</font>),
+{<font color="#990000">_</font>, <font color="#009900">Lang</font>} <font color="#990000">=</font> <b><font color="#000000">lists:keyfind</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"lang"</font><font color="#990000">&gt;&gt;</font>, <font color="#993399">1</font>, <font color="#009900">Cookies</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Or you can perform a match against cookies and retrieve only the ones you need, while at the same time doing any required post processing using <a href="../constraints">constraints</a>. This function returns a map:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_cookies</font></b>([<font color="#FF6600">id</font>, <font color="#FF6600">lang</font>], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>You can use constraints to validate the values while matching them. The following snippet will crash if the <code>id</code> cookie is not an integer number or if the <code>lang</code> cookie is empty. Additionally the <code>id</code> cookie value will be converted to an integer term:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">CookiesMap</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_cookies</font></b>([{<font color="#FF6600">id</font>, <font color="#FF6600">int</font>}, {<font color="#FF6600">lang</font>, <font color="#FF6600">nonempty</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Note that if two cookies share the same name, then the map value will be a list of the two cookie values.</p>
+<p>A default value can be provided. The default will be used if the <code>lang</code> cookie is not found. It will not be used if the cookie is found but has an empty value:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_cookies</font></b>([{<font color="#FF6600">lang</font>, [], <font color="#990000">&lt;&lt;</font><font color="#FF0000">"en-US"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>If no default is provided and the value is missing, an exception is thrown.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/resp/">
+					Sending a response
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/multipart/">
+					Multipart requests
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
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diff --git a/docs/en/cowboy/2.13/guide/cowboy.sty b/docs/en/cowboy/2.13/guide/cowboy.sty
new file mode 100644
index 00000000..d5e0d3be
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/cowboy.sty
@@ -0,0 +1,8 @@
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{asciidoc-dblatex}[2012/10/24 AsciiDoc DocBook Style]
+
+%% Just use the original package and pass the options.
+\RequirePackageWithOptions{docbook}
+
+%% Define an alias for make snippets to be compatible with source-highlighter.
+\lstalias{makefile}{make}
diff --git a/docs/en/cowboy/2.13/guide/erlang_web.asciidoc b/docs/en/cowboy/2.13/guide/erlang_web.asciidoc
new file mode 100644
index 00000000..9517bf70
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/erlang_web.asciidoc
@@ -0,0 +1,209 @@
+[[erlang_web]]
+== Erlang and the Web
+
+Erlang is the ideal platform for writing Web applications.
+Its features are a perfect match for the requirements of
+modern Web applications.
+
+=== The Web is concurrent
+
+When you access a website there is little concurrency
+involved. A few connections are opened and requests
+are sent through these connections. Then the web page
+is displayed on your screen. Your browser will only
+open up to 4 or 8 connections to the server, depending
+on your settings. This isn't much.
+
+But think about it. You are not the only one accessing
+the server at the same time. There can be hundreds, if
+not thousands, if not millions of connections to the
+same server at the same time.
+
+Even today a lot of systems used in production haven't
+solved the C10K problem (ten thousand concurrent connections).
+And the ones who did are trying hard to get to the next
+step, C100K, and are pretty far from it.
+
+Erlang meanwhile has no problem handling millions of
+connections. At the time of writing there are application
+servers written in Erlang that can handle more than two
+million connections on a single server in a real production
+application, with spare memory and CPU!
+
+The Web is concurrent, and Erlang is a language designed
+for concurrency, so it is a perfect match.
+
+Of course, various platforms need to scale beyond a few
+million connections. This is where Erlang's built-in
+distribution mechanisms come in. If one server isn't
+enough, add more! Erlang allows you to use the same code
+for talking to local processes or to processes in other
+parts of your cluster, which means you can scale very
+quickly if the need arises.
+
+The Web has large userbases, and the Erlang platform was
+designed to work in a distributed setting, so it is a
+perfect match.
+
+Or is it? Surely you can find solutions to handle that many
+concurrent connections with your favorite language... But all
+these solutions will break down in the next few years. Why?
+Firstly because servers don't get any more powerful, they
+instead get a lot more cores and memory. This is only useful
+if your application can use them properly, and Erlang is
+light-years ahead of anything else in this respect. Secondly,
+today your computer and your phone are online, tomorrow your
+watch, goggles, bike, car, fridge and tons of other devices
+will also connect to various applications on the Internet.
+
+Only Erlang is prepared to deal with what's coming.
+
+=== The Web is soft real time
+
+What does soft real time mean, you ask? It means we want the
+operations done as quickly as possible, and in the case of
+web applications, it means we want the data propagated fast.
+
+In comparison, hard real time has a similar meaning, but also
+has a hard time constraint, for example an operation needs to
+be done in under N milliseconds otherwise the system fails
+entirely.
+
+Users aren't that needy yet, they just want to get access
+to their content in a reasonable delay, and they want the
+actions they make to register at most a few seconds after
+they submitted them, otherwise they'll start worrying about
+whether it successfully went through.
+
+The Web is soft real time because taking longer to perform an
+operation would be seen as bad quality of service.
+
+Erlang is a soft real time system. It will always run
+processes fairly, a little at a time, switching to another
+process after a while and preventing a single process to
+steal resources from all others. This means that Erlang
+can guarantee stable low latency of operations.
+
+Erlang provides the guarantees that the soft real time Web
+requires.
+
+=== The Web is asynchronous
+
+Long ago, the Web was synchronous because HTTP was synchronous.
+You fired a request, and then waited for a response. Not anymore.
+It all began when XmlHttpRequest started being used. It allowed
+the client to perform asynchronous calls to the server.
+
+Then Websocket appeared and allowed both the server and the client
+to send data to the other endpoint completely asynchronously. The
+data is contained within frames and no response is necessary.
+
+Erlang processes work the same. They send each other data contained
+within messages and then continue running without needing a response.
+They tend to spend most of their time inactive, waiting for a new
+message, and the Erlang VM happily activate them when one is received.
+
+It is therefore quite easy to imagine Erlang being good at receiving
+Websocket frames, which may come in at unpredictable times, pass the
+data to the responsible processes which are always ready waiting for
+new messages, and perform the operations required by only activating
+the required parts of the system.
+
+The more recent Web technologies, like Websocket of course, but also
+HTTP/2.0, are all fully asynchronous protocols. The concept
+of requests and responses is retained of course, but anything could
+be sent in between, by both the client or the browser, and the
+responses could also be received in a completely different order.
+
+Erlang is by nature asynchronous and really good at it thanks to the
+great engineering that has been done in the VM over the years. It's
+only natural that it's so good at dealing with the asynchronous Web.
+
+=== The Web is omnipresent
+
+The Web has taken a very important part of our lives. We're
+connected at all times, when we're on our phone, using our computer,
+passing time using a tablet while in the bathroom... And this
+isn't going to slow down, every single device at home or on us
+will be connected.
+
+All these devices are always connected. And with the number of
+alternatives to give you access to the content you seek, users
+tend to not stick around when problems arise. Users today want
+their applications to be always available and if it's having
+too many issues they just move on.
+
+Despite this, when developers choose a product to use for building
+web applications, their only concern seems to be "Is it fast?",
+and they look around for synthetic benchmarks showing which one
+is the fastest at sending "Hello world" with only a handful
+concurrent connections. Web benchmarks haven't been representative
+of reality in a long time, and are drifting further away as
+time goes on.
+
+What developers should really ask themselves is "Can I service
+all my users with no interruption?" and they'd find that they have
+two choices. They can either hope for the best, or they can use
+Erlang.
+
+Erlang is built for fault tolerance. When writing code in any other
+language, you have to check all the return values and act accordingly
+to avoid any unforeseen issues. If you're lucky, you won't miss
+anything important. When writing Erlang code, you can just check
+the success condition and ignore all errors. If an error happens,
+the Erlang process crashes and is then restarted by a special
+process called a supervisor.
+
+Erlang developers thus have no need to fear unhandled
+errors, and can focus on handling only the errors that should
+give some feedback to the user and let the system take care of
+the rest. This also has the advantage of allowing them to write
+a lot less code, and let them sleep at night.
+
+Erlang's fault tolerance oriented design is the first piece of
+what makes it the best choice for the omnipresent, always available
+Web.
+
+The second piece is Erlang's built-in distribution. Distribution
+is a key part of building a fault tolerant system, because it
+allows you to handle bigger failures, like a whole server going
+down, or even a data center entirely.
+
+Fault tolerance and distribution are important today, and will be
+vital in the future of the Web. Erlang is ready.
+
+=== Learn Erlang
+
+If you are new to Erlang, you may want to grab a book or
+two to get started. Those are my recommendations as the
+author of Cowboy.
+
+==== The Erlanger Playbook
+
+The Erlanger Playbook is an ebook I am currently writing,
+which covers a number of different topics from code to
+documentation to testing Erlang applications. It also has
+an Erlang section where it covers directly the building
+blocks and patterns, rather than details like the syntax.
+
+You can most likely read it as a complete beginner, but
+you will need a companion book to make the most of it.
+Buy it from the https://ninenines.eu[Nine Nines website].
+
+==== Programming Erlang
+
+This book is from one of the creator of Erlang, Joe
+Armstrong. It provides a very good explanation of what
+Erlang is and why it is so. It serves as a very good
+introduction to the language and platform.
+
+The book is http://pragprog.com/book/jaerlang2/programming-erlang[Programming Erlang],
+and it also features a chapter on Cowboy.
+
+==== Learn You Some Erlang for Great Good!
+
+http://learnyousomeerlang.com[LYSE] is a much more complete
+book covering many aspects of Erlang, while also providing
+stories and humor. Be warned: it's pretty verbose. It comes
+with a free online version and a more refined paper and
+ebook version.
diff --git a/docs/en/cowboy/2.13/guide/erlang_web/index.html b/docs/en/cowboy/2.13/guide/erlang_web/index.html
new file mode 100644
index 00000000..a5215db8
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/erlang_web/index.html
@@ -0,0 +1,229 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
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+
+    <title>Nine Nines: Erlang and the Web</title>
+
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
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+
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+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
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+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
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+					</li>
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+            </div>
+          </div>
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+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Erlang and the Web</span></h1>
+
+<p>Erlang is the ideal platform for writing Web applications. Its features are a perfect match for the requirements of modern Web applications.</p>
+<h2 id="_the_web_is_concurrent">The Web is concurrent</h2>
+<p>When you access a website there is little concurrency involved. A few connections are opened and requests are sent through these connections. Then the web page is displayed on your screen. Your browser will only open up to 4 or 8 connections to the server, depending on your settings. This isn&apos;t much.</p>
+<p>But think about it. You are not the only one accessing the server at the same time. There can be hundreds, if not thousands, if not millions of connections to the same server at the same time.</p>
+<p>Even today a lot of systems used in production haven&apos;t solved the C10K problem (ten thousand concurrent connections). And the ones who did are trying hard to get to the next step, C100K, and are pretty far from it.</p>
+<p>Erlang meanwhile has no problem handling millions of connections. At the time of writing there are application servers written in Erlang that can handle more than two million connections on a single server in a real production application, with spare memory and CPU!</p>
+<p>The Web is concurrent, and Erlang is a language designed for concurrency, so it is a perfect match.</p>
+<p>Of course, various platforms need to scale beyond a few million connections. This is where Erlang&apos;s built-in distribution mechanisms come in. If one server isn&apos;t enough, add more! Erlang allows you to use the same code for talking to local processes or to processes in other parts of your cluster, which means you can scale very quickly if the need arises.</p>
+<p>The Web has large userbases, and the Erlang platform was designed to work in a distributed setting, so it is a perfect match.</p>
+<p>Or is it? Surely you can find solutions to handle that many concurrent connections with your favorite language... But all these solutions will break down in the next few years. Why? Firstly because servers don&apos;t get any more powerful, they instead get a lot more cores and memory. This is only useful if your application can use them properly, and Erlang is light-years ahead of anything else in this respect. Secondly, today your computer and your phone are online, tomorrow your watch, goggles, bike, car, fridge and tons of other devices will also connect to various applications on the Internet.</p>
+<p>Only Erlang is prepared to deal with what&apos;s coming.</p>
+<h2 id="_the_web_is_soft_real_time">The Web is soft real time</h2>
+<p>What does soft real time mean, you ask? It means we want the operations done as quickly as possible, and in the case of web applications, it means we want the data propagated fast.</p>
+<p>In comparison, hard real time has a similar meaning, but also has a hard time constraint, for example an operation needs to be done in under N milliseconds otherwise the system fails entirely.</p>
+<p>Users aren&apos;t that needy yet, they just want to get access to their content in a reasonable delay, and they want the actions they make to register at most a few seconds after they submitted them, otherwise they&apos;ll start worrying about whether it successfully went through.</p>
+<p>The Web is soft real time because taking longer to perform an operation would be seen as bad quality of service.</p>
+<p>Erlang is a soft real time system. It will always run processes fairly, a little at a time, switching to another process after a while and preventing a single process to steal resources from all others. This means that Erlang can guarantee stable low latency of operations.</p>
+<p>Erlang provides the guarantees that the soft real time Web requires.</p>
+<h2 id="_the_web_is_asynchronous">The Web is asynchronous</h2>
+<p>Long ago, the Web was synchronous because HTTP was synchronous. You fired a request, and then waited for a response. Not anymore. It all began when XmlHttpRequest started being used. It allowed the client to perform asynchronous calls to the server.</p>
+<p>Then Websocket appeared and allowed both the server and the client to send data to the other endpoint completely asynchronously. The data is contained within frames and no response is necessary.</p>
+<p>Erlang processes work the same. They send each other data contained within messages and then continue running without needing a response. They tend to spend most of their time inactive, waiting for a new message, and the Erlang VM happily activate them when one is received.</p>
+<p>It is therefore quite easy to imagine Erlang being good at receiving Websocket frames, which may come in at unpredictable times, pass the data to the responsible processes which are always ready waiting for new messages, and perform the operations required by only activating the required parts of the system.</p>
+<p>The more recent Web technologies, like Websocket of course, but also HTTP/2.0, are all fully asynchronous protocols. The concept of requests and responses is retained of course, but anything could be sent in between, by both the client or the browser, and the responses could also be received in a completely different order.</p>
+<p>Erlang is by nature asynchronous and really good at it thanks to the great engineering that has been done in the VM over the years. It&apos;s only natural that it&apos;s so good at dealing with the asynchronous Web.</p>
+<h2 id="_the_web_is_omnipresent">The Web is omnipresent</h2>
+<p>The Web has taken a very important part of our lives. We&apos;re connected at all times, when we&apos;re on our phone, using our computer, passing time using a tablet while in the bathroom... And this isn&apos;t going to slow down, every single device at home or on us will be connected.</p>
+<p>All these devices are always connected. And with the number of alternatives to give you access to the content you seek, users tend to not stick around when problems arise. Users today want their applications to be always available and if it&apos;s having too many issues they just move on.</p>
+<p>Despite this, when developers choose a product to use for building web applications, their only concern seems to be &quot;Is it fast?&quot;, and they look around for synthetic benchmarks showing which one is the fastest at sending &quot;Hello world&quot; with only a handful concurrent connections. Web benchmarks haven&apos;t been representative of reality in a long time, and are drifting further away as time goes on.</p>
+<p>What developers should really ask themselves is &quot;Can I service all my users with no interruption?&quot; and they&apos;d find that they have two choices. They can either hope for the best, or they can use Erlang.</p>
+<p>Erlang is built for fault tolerance. When writing code in any other language, you have to check all the return values and act accordingly to avoid any unforeseen issues. If you&apos;re lucky, you won&apos;t miss anything important. When writing Erlang code, you can just check the success condition and ignore all errors. If an error happens, the Erlang process crashes and is then restarted by a special process called a supervisor.</p>
+<p>Erlang developers thus have no need to fear unhandled errors, and can focus on handling only the errors that should give some feedback to the user and let the system take care of the rest. This also has the advantage of allowing them to write a lot less code, and let them sleep at night.</p>
+<p>Erlang&apos;s fault tolerance oriented design is the first piece of what makes it the best choice for the omnipresent, always available Web.</p>
+<p>The second piece is Erlang&apos;s built-in distribution. Distribution is a key part of building a fault tolerant system, because it allows you to handle bigger failures, like a whole server going down, or even a data center entirely.</p>
+<p>Fault tolerance and distribution are important today, and will be vital in the future of the Web. Erlang is ready.</p>
+<h2 id="_learn_erlang">Learn Erlang</h2>
+<p>If you are new to Erlang, you may want to grab a book or two to get started. Those are my recommendations as the author of Cowboy.</p>
+<h4 id="_the_erlanger_playbook">The Erlanger Playbook</h4>
+<p>The Erlanger Playbook is an ebook I am currently writing, which covers a number of different topics from code to documentation to testing Erlang applications. It also has an Erlang section where it covers directly the building blocks and patterns, rather than details like the syntax.</p>
+<p>You can most likely read it as a complete beginner, but you will need a companion book to make the most of it. Buy it from the <a href="https://ninenines.eu">Nine Nines website</a>.</p>
+<h4 id="_programming_erlang">Programming Erlang</h4>
+<p>This book is from one of the creator of Erlang, Joe Armstrong. It provides a very good explanation of what Erlang is and why it is so. It serves as a very good introduction to the language and platform.</p>
+<p>The book is <a href="http://pragprog.com/book/jaerlang2/programming-erlang">Programming Erlang</a>, and it also features a chapter on Cowboy.</p>
+<h4 id="_learn_you_some_erlang_for_great_good">Learn You Some Erlang for Great Good!</h4>
+<p><a href="http://learnyousomeerlang.com">LYSE</a> is a much more complete book covering many aspects of Erlang, while also providing stories and humor. Be warned: it&apos;s pretty verbose. It comes with a free online version and a more refined paper and ebook version.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/modern_web/">
+					The modern Web
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/introduction/">
+					Introduction
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
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diff --git a/docs/en/cowboy/2.13/guide/flow_diagram.asciidoc b/docs/en/cowboy/2.13/guide/flow_diagram.asciidoc
new file mode 100644
index 00000000..9eb74667
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/flow_diagram.asciidoc
@@ -0,0 +1,109 @@
+[[flow_diagram]]
+== Flow diagram
+
+Cowboy is a lightweight HTTP server with support for HTTP/1.1,
+HTTP/2 and Websocket.
+
+It is built on top of Ranch. Please see the Ranch guide for more
+information about how the network connections are handled.
+
+=== Overview
+
+image::http_req_resp.png[HTTP request/response flowchart]
+
+As you can see on the diagram, the client
+begins by connecting to the server. This step is handled
+by a Ranch acceptor, which is a process dedicated to
+accepting new connections.
+
+After Ranch accepts a new connection, whether it is an
+HTTP/1.1 or HTTP/2 connection, Cowboy starts receiving
+requests and handling them.
+
+In HTTP/1.1 all requests come sequentially. In HTTP/2
+the requests may arrive and be processed concurrently.
+
+When a request comes in, Cowboy creates a stream, which
+is a set of request/response and all the events associated
+with them. The protocol code in Cowboy defers the handling
+of these streams to stream handler modules. When you
+configure Cowboy you may define one or more module that
+will receive all events associated with a stream, including
+the request, response, bodies, Erlang messages and more.
+
+By default, Cowboy comes configured with a stream handler
+called `cowboy_stream_h`. This stream handler will create
+a new process for every request coming in, and then
+communicate with this process to read the body or send
+a response back. The request process executes middlewares.
+By default, the request process executes the router and then
+the handlers. Like stream handlers, middlewares may also be
+customized.
+
+A response may be sent at almost any point in this
+diagram. If the response must be sent before the stream
+is initialized (because an error occurred early, for
+example) then stream handlers receive a special event
+indicating this error.
+
+=== Protocol-specific headers
+
+Cowboy takes care of protocol-specific headers and prevents
+you from sending them manually. For HTTP/1.1 this includes
+the `transfer-encoding` and `connection` headers. For HTTP/2
+this includes the colon headers like `:status`.
+
+Cowboy will also remove protocol-specific headers from
+requests before passing them to stream handlers. Cowboy
+tries to hide the implementation details of all protocols
+as well as possible.
+
+=== Number of processes per connection
+
+By default, Cowboy will use one process per connection,
+plus one process per set of request/response (called a
+stream, internally).
+
+The reason it creates a new process for every request is due
+to the requirements of HTTP/2 where requests are executed
+concurrently and independently from the connection. The
+frames from the different requests end up interleaved on
+the single TCP connection.
+
+The request processes are never reused. There is therefore
+no need to perform any cleanup after the response has been
+sent. The process will terminate and Erlang/OTP will reclaim
+all memory at once.
+
+Cowboy ultimately does not require more than one process
+per connection. It is possible to interact with the connection
+directly from a stream handler, a low level interface to Cowboy.
+They are executed from within the connection process, and can
+handle the incoming requests and send responses. This is however
+not recommended in normal circumstances, as a stream handler
+taking too long to execute could have a negative impact on
+concurrent requests or the state of the connection itself.
+
+=== Date header
+
+Because querying for the current date and time can be expensive,
+Cowboy generates one 'Date' header value every second, shares it
+to all other processes, which then simply copy it in the response.
+This allows compliance with HTTP/1.1 with no actual performance loss.
+
+=== Binaries
+
+Cowboy makes extensive use of binaries.
+
+Binaries are more efficient than lists for representing
+strings because they take less memory space. Processing
+performance can vary depending on the operation. Binaries
+are known for generally getting a great boost if the code
+is compiled natively. Please see the HiPE documentation
+for more details.
+
+Binaries may end up being shared between processes. This
+can lead to some large memory usage when one process keeps
+the binary data around forever without freeing it. If you
+see some weird memory usage in your application, this might
+be the cause.
diff --git a/docs/en/cowboy/2.13/guide/flow_diagram/index.html b/docs/en/cowboy/2.13/guide/flow_diagram/index.html
new file mode 100644
index 00000000..6fb62f66
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/flow_diagram/index.html
@@ -0,0 +1,207 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Flow diagram</span></h1>
+
+<p>Cowboy is a lightweight HTTP server with support for HTTP/1.1, HTTP/2 and Websocket.</p>
+<p>It is built on top of Ranch. Please see the Ranch guide for more information about how the network connections are handled.</p>
+<h2 id="_overview">Overview</h2>
+<img src="../http_req_resp.png" alt="HTTP request/response flowchart"/><p>As you can see on the diagram, the client begins by connecting to the server. This step is handled by a Ranch acceptor, which is a process dedicated to accepting new connections.</p>
+<p>After Ranch accepts a new connection, whether it is an HTTP/1.1 or HTTP/2 connection, Cowboy starts receiving requests and handling them.</p>
+<p>In HTTP/1.1 all requests come sequentially. In HTTP/2 the requests may arrive and be processed concurrently.</p>
+<p>When a request comes in, Cowboy creates a stream, which is a set of request/response and all the events associated with them. The protocol code in Cowboy defers the handling of these streams to stream handler modules. When you configure Cowboy you may define one or more module that will receive all events associated with a stream, including the request, response, bodies, Erlang messages and more.</p>
+<p>By default, Cowboy comes configured with a stream handler called <code>cowboy_stream_h</code>. This stream handler will create a new process for every request coming in, and then communicate with this process to read the body or send a response back. The request process executes middlewares. By default, the request process executes the router and then the handlers. Like stream handlers, middlewares may also be customized.</p>
+<p>A response may be sent at almost any point in this diagram. If the response must be sent before the stream is initialized (because an error occurred early, for example) then stream handlers receive a special event indicating this error.</p>
+<h2 id="_protocol_specific_headers">Protocol-specific headers</h2>
+<p>Cowboy takes care of protocol-specific headers and prevents you from sending them manually. For HTTP/1.1 this includes the <code>transfer-encoding</code> and <code>connection</code> headers. For HTTP/2 this includes the colon headers like <code>:status</code>.</p>
+<p>Cowboy will also remove protocol-specific headers from requests before passing them to stream handlers. Cowboy tries to hide the implementation details of all protocols as well as possible.</p>
+<h2 id="_number_of_processes_per_connection">Number of processes per connection</h2>
+<p>By default, Cowboy will use one process per connection, plus one process per set of request/response (called a stream, internally).</p>
+<p>The reason it creates a new process for every request is due to the requirements of HTTP/2 where requests are executed concurrently and independently from the connection. The frames from the different requests end up interleaved on the single TCP connection.</p>
+<p>The request processes are never reused. There is therefore no need to perform any cleanup after the response has been sent. The process will terminate and Erlang/OTP will reclaim all memory at once.</p>
+<p>Cowboy ultimately does not require more than one process per connection. It is possible to interact with the connection directly from a stream handler, a low level interface to Cowboy. They are executed from within the connection process, and can handle the incoming requests and send responses. This is however not recommended in normal circumstances, as a stream handler taking too long to execute could have a negative impact on concurrent requests or the state of the connection itself.</p>
+<h2 id="_date_header">Date header</h2>
+<p>Because querying for the current date and time can be expensive, Cowboy generates one <em>Date</em> header value every second, shares it to all other processes, which then simply copy it in the response. This allows compliance with HTTP/1.1 with no actual performance loss.</p>
+<h2 id="_binaries">Binaries</h2>
+<p>Cowboy makes extensive use of binaries.</p>
+<p>Binaries are more efficient than lists for representing strings because they take less memory space. Processing performance can vary depending on the operation. Binaries are known for generally getting a great boost if the code is compiled natively. Please see the HiPE documentation for more details.</p>
+<p>Binaries may end up being shared between processes. This can lead to some large memory usage when one process keeps the binary data around forever without freeing it. If you see some weird memory usage in your application, this might be the cause.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/getting_started/">
+					Getting started
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/listeners/">
+					Listeners
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/getting_started.asciidoc b/docs/en/cowboy/2.13/guide/getting_started.asciidoc
new file mode 100644
index 00000000..06677ee8
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/getting_started.asciidoc
@@ -0,0 +1,153 @@
+[[getting_started]]
+== Getting started
+
+Erlang is more than a language, it is also an operating system
+for your applications. Erlang developers rarely write standalone
+modules, they write libraries or applications, and then bundle
+those into what is called a release. A release contains the
+Erlang VM plus all applications required to run the node, so
+it can be pushed to production directly.
+
+This chapter walks you through all the steps of setting up
+Cowboy, writing your first application and generating your first
+release. At the end of this chapter you should know everything
+you need to push your first Cowboy application to production.
+
+=== Prerequisites
+
+We are going to use the https://github.com/ninenines/erlang.mk[Erlang.mk]
+build system. If you are using Windows, please check the
+http://erlang.mk/guide/installation.html[Installation instructions]
+to get your environment setup before you continue.
+
+=== Bootstrap
+
+First, let's create the directory for our application.
+
+[source,bash]
+$ mkdir hello_erlang
+$ cd hello_erlang
+
+Then we need to download Erlang.mk. Either use the following
+command or download it manually.
+
+[source,bash]
+$ wget https://erlang.mk/erlang.mk
+
+We can now bootstrap our application. Since we are going to generate
+a release, we will also bootstrap it at the same time.
+
+[source,bash]
+$ make -f erlang.mk bootstrap bootstrap-rel
+
+This creates a Makefile, a base application, and the release files
+necessary for creating the release. We can already build and start
+this release.
+
+[source,bash]
+----
+$ make run
+...
+(hello_erlang@127.0.0.1)1>
+----
+
+Entering the command `i().` will show the running processes, including
+one called `hello_erlang_sup`. This is the supervisor for our
+application.
+
+The release currently does nothing. In the rest of this chapter we
+will add Cowboy as a dependency and write a simple "Hello world!"
+handler.
+
+=== Cowboy setup
+
+We will modify the 'Makefile' to tell the build system it needs to
+fetch and compile Cowboy, and that we will use releases:
+
+[source,makefile]
+----
+PROJECT = hello_erlang
+
+DEPS = cowboy
+dep_cowboy_commit = 2.13.0
+
+REL_DEPS = relx
+
+DEP_PLUGINS = cowboy
+
+include erlang.mk
+----
+
+The `DEP_PLUGINS` line tells the build system to load the plugins
+Cowboy provides. These include predefined templates that we will
+use soon.
+
+The `REL_DEPS` line tells the build system to fetch and build
+`relx`, the library that will create the release.
+
+If you do `make run` now, Cowboy will be included in the release
+and started automatically. This is not enough however, as Cowboy
+doesn't do anything by default. We still need to tell Cowboy to
+listen for connections.
+
+=== Listening for connections
+
+First we define the routes that Cowboy will use to map requests
+to handler modules, and then we start the listener. This is best
+done at application startup.
+
+Open the 'src/hello_erlang_app.erl' file and add the necessary
+code to the `start/2` function to make it look like this:
+
+[source,erlang]
+----
+start(_Type, _Args) ->
+    Dispatch = cowboy_router:compile([
+        {'_', [{"/", hello_handler, []}]}
+    ]),
+    {ok, _} = cowboy:start_clear(my_http_listener,
+        [{port, 8080}],
+        #{env => #{dispatch => Dispatch}}
+    ),
+    hello_erlang_sup:start_link().
+----
+
+Routes are explained in details in the xref:routing[Routing]
+chapter. For this tutorial we map the path `/` to the handler
+module `hello_handler`. This module doesn't exist yet.
+
+Build and start the release, then open http://localhost:8080
+in your browser. You will get a 500 error because the module is missing.
+Any other URL, like http://localhost:8080/test, will result in a
+404 error.
+
+=== Handling requests
+
+Cowboy features different kinds of handlers, including REST
+and Websocket handlers. For this tutorial we will use a plain
+HTTP handler.
+
+Generate a handler from a template:
+
+[source,bash]
+$ make new t=cowboy.http n=hello_handler
+
+Then, open the 'src/hello_handler.erl' file and modify
+the `init/2` function like this to send a reply.
+
+[source,erlang]
+----
+init(Req0, State) ->
+    Req = cowboy_req:reply(200,
+        #{<<"content-type">> => <<"text/plain">>},
+        <<"Hello Erlang!">>,
+        Req0),
+    {ok, Req, State}.
+----
+
+What the above code does is send a 200 OK reply, with the
+Content-type header set to `text/plain` and the response
+body set to `Hello Erlang!`.
+
+If you run the release and open http://localhost:8080
+in your browser, you should get a nice `Hello Erlang!` displayed!
diff --git a/docs/en/cowboy/2.13/guide/getting_started/index.html b/docs/en/cowboy/2.13/guide/getting_started/index.html
new file mode 100644
index 00000000..a272a66f
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/getting_started/index.html
@@ -0,0 +1,284 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Getting started</title>
+
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+
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+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
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+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
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+                </ul>
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+					</li>
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+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Getting started</span></h1>
+
+<p>Erlang is more than a language, it is also an operating system for your applications. Erlang developers rarely write standalone modules, they write libraries or applications, and then bundle those into what is called a release. A release contains the Erlang VM plus all applications required to run the node, so it can be pushed to production directly.</p>
+<p>This chapter walks you through all the steps of setting up Cowboy, writing your first application and generating your first release. At the end of this chapter you should know everything you need to push your first Cowboy application to production.</p>
+<h2 id="_prerequisites">Prerequisites</h2>
+<p>We are going to use the <a href="https://github.com/ninenines/erlang.mk">Erlang.mk</a> build system. If you are using Windows, please check the <a href="http://erlang.mk/guide/installation.html">Installation instructions</a> to get your environment setup before you continue.</p>
+<h2 id="_bootstrap">Bootstrap</h2>
+<p>First, let&apos;s create the directory for our application.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>$ mkdir hello_erlang
+$ cd hello_erlang</tt></pre>
+</div></div>
+<p>Then we need to download Erlang.mk. Either use the following command or download it manually.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>$ wget https<font color="#990000">:</font>//erlang<font color="#990000">.</font>mk/erlang<font color="#990000">.</font>mk</tt></pre>
+</div></div>
+<p>We can now bootstrap our application. Since we are going to generate a release, we will also bootstrap it at the same time.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>$ make -f erlang<font color="#990000">.</font>mk bootstrap bootstrap-rel</tt></pre>
+</div></div>
+<p>This creates a Makefile, a base application, and the release files necessary for creating the release. We can already build and start this release.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>$ make run
+<font color="#990000">...</font>
+<font color="#990000">(</font>hello_erlang@<font color="#993399">127.0</font><font color="#990000">.</font><font color="#993399">0.1</font><font color="#990000">)</font><font color="#993399">1</font><font color="#990000">&gt;</font></tt></pre>
+</div></div>
+<p>Entering the command <code>i().</code> will show the running processes, including one called <code>hello_erlang_sup</code>. This is the supervisor for our application.</p>
+<p>The release currently does nothing. In the rest of this chapter we will add Cowboy as a dependency and write a simple &quot;Hello world!&quot; handler.</p>
+<h2 id="_cowboy_setup">Cowboy setup</h2>
+<p>We will modify the <em>Makefile</em> to tell the build system it needs to fetch and compile Cowboy, and that we will use releases:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PROJECT =</font> hello_erlang
+
+<font color="#009900">DEPS =</font> cowboy
+<font color="#009900">dep_cowboy_commit =</font> 2.13.0
+
+<font color="#009900">REL_DEPS =</font> relx
+
+<font color="#009900">DEP_PLUGINS =</font> cowboy
+
+include erlang.mk</tt></pre>
+</div></div>
+<p>The <code>DEP_PLUGINS</code> line tells the build system to load the plugins Cowboy provides. These include predefined templates that we will use soon.</p>
+<p>The <code>REL_DEPS</code> line tells the build system to fetch and build <code>relx</code>, the library that will create the release.</p>
+<p>If you do <code>make run</code> now, Cowboy will be included in the release and started automatically. This is not enough however, as Cowboy doesn&apos;t do anything by default. We still need to tell Cowboy to listen for connections.</p>
+<h2 id="_listening_for_connections">Listening for connections</h2>
+<p>First we define the routes that Cowboy will use to map requests to handler modules, and then we start the listener. This is best done at application startup.</p>
+<p>Open the <em>src/hello_erlang_app.erl</em> file and add the necessary code to the <code>start/2</code> function to make it look like this:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">start</font></b>(<font color="#009900">_Type</font>, <font color="#009900">_Args</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+        {<font color="#FF6600">'_'</font>, [{<font color="#FF0000">"/"</font>, <font color="#FF6600">hello_handler</font>, []}]}
+    ]),
+    {<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_clear</font></b>(<font color="#FF6600">my_http_listener</font>,
+        [{<font color="#FF6600">port</font>, <font color="#993399">8080</font>}],
+        #{<font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}}
+    ),
+    <b><font color="#000000">hello_erlang_sup:start_link</font></b>()<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Routes are explained in details in the <a href="../routing">Routing</a> chapter. For this tutorial we map the path <code>/</code> to the handler module <code>hello_handler</code>. This module doesn&apos;t exist yet.</p>
+<p>Build and start the release, then open <a href="http://localhost:8080">http://localhost:8080</a> in your browser. You will get a 500 error because the module is missing. Any other URL, like <a href="http://localhost:8080/test">http://localhost:8080/test</a>, will result in a 404 error.</p>
+<h2 id="_handling_requests">Handling requests</h2>
+<p>Cowboy features different kinds of handlers, including REST and Websocket handlers. For this tutorial we will use a plain HTTP handler.</p>
+<p>Generate a handler from a template:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>$ make new <font color="#009900">t</font><font color="#990000">=</font>cowboy<font color="#990000">.</font>http <font color="#009900">n</font><font color="#990000">=</font>hello_handler</tt></pre>
+</div></div>
+<p>Then, open the <em>src/hello_handler.erl</em> file and modify the <code>init/2</code> function like this to send a reply.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req0</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>,
+        #{<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>},
+        <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello Erlang!"</font><font color="#990000">&gt;&gt;</font>,
+        <font color="#009900">Req0</font>),
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>What the above code does is send a 200 OK reply, with the Content-type header set to <code>text/plain</code> and the response body set to <code>Hello Erlang!</code>.</p>
+<p>If you run the release and open <a href="http://localhost:8080">http://localhost:8080</a> in your browser, you should get a nice <code>Hello Erlang!</code> displayed!</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/introduction/">
+					Introduction
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/flow_diagram/">
+					Flow diagram
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
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+      <footer>
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+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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diff --git a/docs/en/cowboy/2.13/guide/handlers.asciidoc b/docs/en/cowboy/2.13/guide/handlers.asciidoc
new file mode 100644
index 00000000..fe6f4623
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/handlers.asciidoc
@@ -0,0 +1,90 @@
+[[handlers]]
+== Handlers
+
+Handlers are Erlang modules that handle HTTP requests.
+
+=== Plain HTTP handlers
+
+The most basic handler in Cowboy implements the mandatory
+`init/2` callback, manipulates the request, optionally
+sends a response and then returns.
+
+This callback receives the xref:req[Req object] and the initial
+state defined in the xref:routing[router configuration].
+
+A handler that does nothing would look like this:
+
+[source,erlang]
+----
+init(Req, State) ->
+    {ok, Req, State}.
+----
+
+Despite sending no reply, a `204 No Content` response will be
+sent to the client, as Cowboy makes sure that a response is
+sent for every request.
+
+We need to use the Req object to reply.
+
+[source,erlang]
+----
+init(Req0, State) ->
+    Req = cowboy_req:reply(200, #{
+        <<"content-type">> => <<"text/plain">>
+    }, <<"Hello World!">>, Req0),
+    {ok, Req, State}.
+----
+
+Cowboy will immediately send a response when `cowboy:reply/4`
+is called.
+
+We then return a 3-tuple. `ok` means that the handler ran
+successfully. We also give the modified Req back to Cowboy.
+
+The last value of the tuple is a state that will be used
+in every subsequent callbacks to this handler. Plain HTTP
+handlers only have one additional callback, the optional
+and rarely used `terminate/3`.
+
+=== Other handlers
+
+The `init/2` callback can also be used to inform Cowboy
+that this is a different kind of handler and that Cowboy
+should switch to it. To do this you simply need to return
+the module name of the handler type you want to switch to.
+
+Cowboy comes with three handler types you can switch to:
+xref:rest_handlers[cowboy_rest], xref:ws_handlers[cowboy_websocket]
+and xref:loop_handlers[cowboy_loop]. In addition to those you
+can define your own handler types.
+
+Switching is simple. Instead of returning `ok`, you simply
+return the name of the handler type you want to use. The
+following snippet switches to a Websocket handler:
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_websocket, Req, State}.
+----
+
+=== Cleaning up
+
+All handler types provide the optional `terminate/3` callback.
+
+[source,erlang]
+----
+terminate(_Reason, _Req, _State) ->
+    ok.
+----
+
+This callback is strictly reserved for any required cleanup.
+You cannot send a response from this function. There is no
+other return value.
+
+This callback is optional because it is rarely necessary.
+Cleanup should be done in separate processes directly (by
+monitoring the handler process to detect when it exits).
+
+Cowboy does not reuse processes for different requests. The
+process will terminate soon after this call returns.
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+<h1 class="lined-header"><span>Handlers</span></h1>
+
+<p>Handlers are Erlang modules that handle HTTP requests.</p>
+<h2 id="_plain_http_handlers">Plain HTTP handlers</h2>
+<p>The most basic handler in Cowboy implements the mandatory <code>init/2</code> callback, manipulates the request, optionally sends a response and then returns.</p>
+<p>This callback receives the <a href="../req">Req object</a> and the initial state defined in the <a href="../routing">router configuration</a>.</p>
+<p>A handler that does nothing would look like this:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Despite sending no reply, a <code>204 No Content</code> response will be sent to the client, as Cowboy makes sure that a response is sent for every request.</p>
+<p>We need to use the Req object to reply.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req0</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+        <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>
+    }, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello World!"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>),
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy will immediately send a response when <code>cowboy:reply/4</code> is called.</p>
+<p>We then return a 3-tuple. <code>ok</code> means that the handler ran successfully. We also give the modified Req back to Cowboy.</p>
+<p>The last value of the tuple is a state that will be used in every subsequent callbacks to this handler. Plain HTTP handlers only have one additional callback, the optional and rarely used <code>terminate/3</code>.</p>
+<h2 id="_other_handlers">Other handlers</h2>
+<p>The <code>init/2</code> callback can also be used to inform Cowboy that this is a different kind of handler and that Cowboy should switch to it. To do this you simply need to return the module name of the handler type you want to switch to.</p>
+<p>Cowboy comes with three handler types you can switch to: <a href="../rest_handlers">cowboy_rest</a>, <a href="../ws_handlers">cowboy_websocket</a> and <a href="../loop_handlers">cowboy_loop</a>. In addition to those you can define your own handler types.</p>
+<p>Switching is simple. Instead of returning <code>ok</code>, you simply return the name of the handler type you want to use. The following snippet switches to a Websocket handler:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_cleaning_up">Cleaning up</h2>
+<p>All handler types provide the optional <code>terminate/3</code> callback.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">terminate</font></b>(<font color="#009900">_Reason</font>, <font color="#009900">_Req</font>, <font color="#009900">_State</font>) <font color="#990000">-&gt;</font>
+    <font color="#FF6600">ok</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>This callback is strictly reserved for any required cleanup. You cannot send a response from this function. There is no other return value.</p>
+<p>This callback is optional because it is rarely necessary. Cleanup should be done in separate processes directly (by monitoring the handler process to detect when it exits).</p>
+<p>Cowboy does not reuse processes for different requests. The process will terminate soon after this call returns.</p>
+
+
+
+
+	
+		
+		
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+
+		<nav style="margin:1em 0">
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+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/constraints/">
+					Constraints
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/loop_handlers/">
+					Loop handlers
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+			
+		</nav>
+	
+
+
+
+</div>
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+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
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+	
+</ul>
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+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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+	
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diff --git a/docs/en/cowboy/2.13/guide/index.html b/docs/en/cowboy/2.13/guide/index.html
new file mode 100644
index 00000000..98797502
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/index.html
@@ -0,0 +1,262 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Cowboy User Guide</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Cowboy User Guide</span></h1>
+
+<!-- REST: where should i handle bindings? init, probably. qs? in media type functions-->
+<!-- REST: explain how a module per media type is good; module may be shared between client/server-->
+<h2 id="_rationale">Rationale</h2>
+<ul><li><a href="modern_web/">The modern Web</a>
+</li>
+<li><a href="erlang_web/">Erlang and the Web</a>
+</li>
+</ul>
+<h2 id="_introduction">Introduction</h2>
+<ul><li><a href="introduction/">Introduction</a>
+</li>
+<li><a href="getting_started/">Getting started</a>
+</li>
+<li><a href="flow_diagram/">Flow diagram</a>
+</li>
+</ul>
+<h2 id="_configuration">Configuration</h2>
+<ul><li><a href="listeners/">Listeners</a>
+</li>
+<li><a href="routing/">Routing</a>
+</li>
+<li><a href="constraints/">Constraints</a>
+</li>
+</ul>
+<h2 id="_handlers">Handlers</h2>
+<ul><li><a href="handlers/">Handlers</a>
+</li>
+<li><a href="loop_handlers/">Loop handlers</a>
+</li>
+<li><a href="static_files/">Static files</a>
+</li>
+</ul>
+<h2 id="_request_and_response">Request and response</h2>
+<ul><li><a href="req/">Request details</a>
+</li>
+<li><a href="req_body/">Reading the request body</a>
+</li>
+<li><a href="resp/">Sending a response</a>
+</li>
+<li><a href="cookies/">Using cookies</a>
+</li>
+<li><a href="multipart/">Multipart</a>
+</li>
+</ul>
+<h2 id="_rest">REST</h2>
+<ul><li><a href="rest_principles/">REST principles</a>
+</li>
+<li><a href="rest_handlers/">Handling REST requests</a>
+</li>
+<li><a href="rest_flowcharts/">REST flowcharts</a>
+</li>
+<li><a href="resource_design/">Designing a resource handler</a>
+</li>
+</ul>
+<h2 id="_websocket">Websocket</h2>
+<ul><li><a href="ws_protocol/">The Websocket protocol</a>
+</li>
+<li><a href="ws_handlers/">Websocket handlers</a>
+</li>
+</ul>
+<h2 id="_advanced">Advanced</h2>
+<ul><li><a href="streams/">Streams</a>
+</li>
+<li><a href="middlewares/">Middlewares</a>
+</li>
+<li><a href="performance/">Performance</a>
+</li>
+</ul>
+<h2 id="_additional_information">Additional information</h2>
+<ul><li><a href="migrating_from_2.12/">Migrating from Cowboy 2.12 to 2.13</a>
+</li>
+<li><a href="migrating_from_2.11/">Migrating from Cowboy 2.11 to 2.12</a>
+</li>
+<li><a href="migrating_from_2.10/">Migrating from Cowboy 2.10 to 2.11</a>
+</li>
+<li><a href="migrating_from_2.9/">Migrating from Cowboy 2.9 to 2.10</a>
+</li>
+<li><a href="migrating_from_2.8/">Migrating from Cowboy 2.8 to 2.9</a>
+</li>
+<li><a href="migrating_from_2.7/">Migrating from Cowboy 2.7 to 2.8</a>
+</li>
+<li><a href="migrating_from_2.6/">Migrating from Cowboy 2.6 to 2.7</a>
+</li>
+<li><a href="migrating_from_2.5/">Migrating from Cowboy 2.5 to 2.6</a>
+</li>
+<li><a href="migrating_from_2.4/">Migrating from Cowboy 2.4 to 2.5</a>
+</li>
+<li><a href="migrating_from_2.3/">Migrating from Cowboy 2.3 to 2.4</a>
+</li>
+<li><a href="migrating_from_2.2/">Migrating from Cowboy 2.2 to 2.3</a>
+</li>
+<li><a href="migrating_from_2.1/">Migrating from Cowboy 2.1 to 2.2</a>
+</li>
+<li><a href="migrating_from_2.0/">Migrating from Cowboy 2.0 to 2.1</a>
+</li>
+<li><a href="migrating_from_1.0/">Migrating from Cowboy 1.0 to 2.0</a>
+</li>
+<li><a href="specs/">HTTP and other specifications</a>
+</li>
+</ul>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/introduction.asciidoc b/docs/en/cowboy/2.13/guide/introduction.asciidoc
new file mode 100644
index 00000000..3a03a78b
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/introduction.asciidoc
@@ -0,0 +1,75 @@
+[[introduction]]
+== Introduction
+
+Cowboy is a small, fast and modern HTTP server for Erlang/OTP.
+
+Cowboy aims to provide a complete xref:modern_web[modern Web stack].
+This includes HTTP/1.1, HTTP/2, Websocket, Server-Sent Events and
+Webmachine-based REST.
+
+Cowboy comes with functions for introspection and tracing, enabling
+developers to know precisely what is happening at any time. Its modular
+design also easily enable developers to add instrumentation.
+
+Cowboy is a high quality project. It has a small code base, is very
+efficient (both in latency and memory use) and can easily be embedded
+in another application.
+
+Cowboy is clean Erlang code. It includes hundreds of tests and its code
+is fully compliant with the Dialyzer. It is also well documented and
+features a Function Reference, a User Guide and numerous Tutorials.
+
+=== Prerequisites
+
+Beginner Erlang knowledge is recommended for reading this guide.
+
+Knowledge of the HTTP protocol is recommended but not required, as it
+will be detailed throughout the guide.
+
+=== Supported platforms
+
+Cowboy is tested and supported on Linux, FreeBSD, Windows and OSX.
+
+Cowboy has been reported to work on other platforms, but we make no
+guarantee that the experience will be safe and smooth. You are advised
+to perform the necessary testing and security audits prior to deploying
+on other platforms.
+
+Cowboy is developed for Erlang/OTP 24.0 and newer.
+
+=== License
+
+Cowboy uses the ISC License.
+
+----
+Copyright (c) 2011-2025, Loïc Hoguin <essen@ninenines.eu>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+----
+
+=== Versioning
+
+Cowboy uses http://semver.org/[Semantic Versioning 2.0.0].
+
+=== Conventions
+
+In the HTTP protocol, the method name is case sensitive. All standard
+method names are uppercase.
+
+Header names are case insensitive. When using HTTP/1.1, Cowboy converts
+all the request header names to lowercase. HTTP/2 requires clients to
+send them as lowercase. Any other header name is expected to be provided
+lowercased, including when querying information about the request or
+when sending responses.
+
+The same applies to any other case insensitive value.
diff --git a/docs/en/cowboy/2.13/guide/introduction/index.html b/docs/en/cowboy/2.13/guide/introduction/index.html
new file mode 100644
index 00000000..4711c146
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/introduction/index.html
@@ -0,0 +1,217 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Introduction</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Introduction</span></h1>
+
+<p>Cowboy is a small, fast and modern HTTP server for Erlang/OTP.</p>
+<p>Cowboy aims to provide a complete <a href="../modern_web">modern Web stack</a>. This includes HTTP/1.1, HTTP/2, Websocket, Server-Sent Events and Webmachine-based REST.</p>
+<p>Cowboy comes with functions for introspection and tracing, enabling developers to know precisely what is happening at any time. Its modular design also easily enable developers to add instrumentation.</p>
+<p>Cowboy is a high quality project. It has a small code base, is very efficient (both in latency and memory use) and can easily be embedded in another application.</p>
+<p>Cowboy is clean Erlang code. It includes hundreds of tests and its code is fully compliant with the Dialyzer. It is also well documented and features a Function Reference, a User Guide and numerous Tutorials.</p>
+<h2 id="_prerequisites">Prerequisites</h2>
+<p>Beginner Erlang knowledge is recommended for reading this guide.</p>
+<p>Knowledge of the HTTP protocol is recommended but not required, as it will be detailed throughout the guide.</p>
+<h2 id="_supported_platforms">Supported platforms</h2>
+<p>Cowboy is tested and supported on Linux, FreeBSD, Windows and OSX.</p>
+<p>Cowboy has been reported to work on other platforms, but we make no guarantee that the experience will be safe and smooth. You are advised to perform the necessary testing and security audits prior to deploying on other platforms.</p>
+<p>Cowboy is developed for Erlang/OTP 24.0 and newer.</p>
+<h2 id="_license">License</h2>
+<p>Cowboy uses the ISC License.</p>
+<div class="listingblock"><div class="content"><pre>Copyright (c) 2011-2025, Loïc Hoguin &lt;essen@ninenines.eu&gt;
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED &quot;AS IS&quot; AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
+<h2 id="_versioning">Versioning</h2>
+<p>Cowboy uses <a href="http://semver.org/">Semantic Versioning 2.0.0</a>.</p>
+<h2 id="_conventions">Conventions</h2>
+<p>In the HTTP protocol, the method name is case sensitive. All standard method names are uppercase.</p>
+<p>Header names are case insensitive. When using HTTP/1.1, Cowboy converts all the request header names to lowercase. HTTP/2 requires clients to send them as lowercase. Any other header name is expected to be provided lowercased, including when querying information about the request or when sending responses.</p>
+<p>The same applies to any other case insensitive value.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/erlang_web/">
+					Erlang and the Web
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/getting_started/">
+					Getting started
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/listeners.asciidoc b/docs/en/cowboy/2.13/guide/listeners.asciidoc
new file mode 100644
index 00000000..40aff83e
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/listeners.asciidoc
@@ -0,0 +1,128 @@
+[[listeners]]
+== Listeners
+
+A listener is a set of processes that listens on a port for
+new connections. Incoming connections get handled by Cowboy.
+Depending on the connection handshake, one or another protocol
+may be used.
+
+This chapter is specific to Cowboy. Please refer to the
+https://ninenines.eu/docs/en/ranch/1.8/guide/listeners/[Ranch User Guide]
+for more information about listeners.
+
+Cowboy provides two types of listeners: one listening for
+clear TCP connections, and one listening for secure TLS
+connections. Both of them support the HTTP/1.1 and HTTP/2
+protocols.
+
+=== Clear TCP listener
+
+The clear TCP listener will accept connections on the
+given port. A typical HTTP server would listen on port 80.
+Port 80 requires special permissions on most platforms
+however so a common alternative is port 8080.
+
+The following snippet starts listening for connections
+on port 8080:
+
+[source,erlang]
+----
+start(_Type, _Args) ->
+    Dispatch = cowboy_router:compile([
+        {'_', [{"/", hello_handler, []}]}
+    ]),
+    {ok, _} = cowboy:start_clear(my_http_listener,
+        [{port, 8080}],
+        #{env => #{dispatch => Dispatch}}
+    ),
+    hello_erlang_sup:start_link().
+----
+
+The xref:getting_started[Getting Started] chapter uses a
+clear TCP listener.
+
+Clients connecting to Cowboy on the clear listener port are
+expected to use either HTTP/1.1 or HTTP/2.
+
+Cowboy supports both methods of initiating a clear
+HTTP/2 connection: through the Upgrade mechanism
+(https://tools.ietf.org/html/rfc7540#section-3.2[RFC 7540 3.2])
+or by sending the preface directly
+(https://tools.ietf.org/html/rfc7540#section-3.4[RFC 7540 3.4]).
+
+Compatibility with HTTP/1.0 is provided by Cowboy's HTTP/1.1
+implementation.
+
+=== Secure TLS listener
+
+The secure TLS listener will accept connections on the
+given port. A typical HTTPS server would listen on port 443.
+Port 443 requires special permissions on most platforms
+however so a common alternative is port 8443.
+
+// @todo Make a complete list of restrictions.
+
+The function provided by Cowboy will ensure that the TLS
+options given are following the HTTP/2 RFC with regards
+to security. For example some TLS extensions or ciphers
+may be disabled. This also applies to HTTP/1.1 connections
+on this listener. If this is not desirable, Ranch can be
+used directly to set up a custom listener.
+
+[source,erlang]
+----
+start(_Type, _Args) ->
+    Dispatch = cowboy_router:compile([
+        {'_', [{"/", hello_handler, []}]}
+    ]),
+    {ok, _} = cowboy:start_tls(my_https_listener,
+        [
+            {port, 8443},
+            {certfile, "/path/to/certfile"},
+            {keyfile, "/path/to/keyfile"}
+        ],
+        #{env => #{dispatch => Dispatch}}
+    ),
+    hello_erlang_sup:start_link().
+----
+
+Clients connecting to Cowboy on the secure listener are
+expected to use the ALPN TLS extension to indicate what
+protocols they understand. Cowboy always prefers HTTP/2
+over HTTP/1.1 when both are supported. When neither are
+supported by the client, or when the ALPN extension was
+missing, Cowboy expects HTTP/1.1 to be used.
+
+Cowboy also advertises HTTP/2 support through the older
+NPN TLS extension for compatibility. Note however that
+this support will likely not be enabled by default when
+Cowboy 2.0 gets released.
+
+Compatibility with HTTP/1.0 is provided by Cowboy's HTTP/1.1
+implementation.
+
+=== Stopping the listener
+
+When starting listeners along with the application it is
+a good idea to also stop the listener when the application
+stops. This can be done by calling `cowboy:stop_listener/1`
+in the application's stop function:
+
+[source,erlang]
+----
+stop(_State) ->
+    ok = cowboy:stop_listener(my_http_listener).
+----
+
+=== Protocol configuration
+
+The HTTP/1.1 and HTTP/2 protocols share the same semantics;
+only their framing differs. The first is a text protocol and
+the second a binary protocol.
+
+Cowboy doesn't separate the configuration for HTTP/1.1 and
+HTTP/2. Everything goes into the same map. Many options are
+shared.
+
+// @todo Describe good to know options for both protocols?
+// Maybe do that in separate chapters?
diff --git a/docs/en/cowboy/2.13/guide/listeners/index.html b/docs/en/cowboy/2.13/guide/listeners/index.html
new file mode 100644
index 00000000..28d282d9
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/listeners/index.html
@@ -0,0 +1,247 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Listeners</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
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+                </li>
+                    <li>
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+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Listeners</span></h1>
+
+<p>A listener is a set of processes that listens on a port for new connections. Incoming connections get handled by Cowboy. Depending on the connection handshake, one or another protocol may be used.</p>
+<p>This chapter is specific to Cowboy. Please refer to the <a href="https://ninenines.eu/docs/en/ranch/1.8/guide/listeners/">Ranch User Guide</a> for more information about listeners.</p>
+<p>Cowboy provides two types of listeners: one listening for clear TCP connections, and one listening for secure TLS connections. Both of them support the HTTP/1.1 and HTTP/2 protocols.</p>
+<h2 id="_clear_tcp_listener">Clear TCP listener</h2>
+<p>The clear TCP listener will accept connections on the given port. A typical HTTP server would listen on port 80. Port 80 requires special permissions on most platforms however so a common alternative is port 8080.</p>
+<p>The following snippet starts listening for connections on port 8080:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">start</font></b>(<font color="#009900">_Type</font>, <font color="#009900">_Args</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+        {<font color="#FF6600">'_'</font>, [{<font color="#FF0000">"/"</font>, <font color="#FF6600">hello_handler</font>, []}]}
+    ]),
+    {<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_clear</font></b>(<font color="#FF6600">my_http_listener</font>,
+        [{<font color="#FF6600">port</font>, <font color="#993399">8080</font>}],
+        #{<font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}}
+    ),
+    <b><font color="#000000">hello_erlang_sup:start_link</font></b>()<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The <a href="../getting_started">Getting Started</a> chapter uses a clear TCP listener.</p>
+<p>Clients connecting to Cowboy on the clear listener port are expected to use either HTTP/1.1 or HTTP/2.</p>
+<p>Cowboy supports both methods of initiating a clear HTTP/2 connection: through the Upgrade mechanism (<a href="https://tools.ietf.org/html/rfc7540#section-3.2">RFC 7540 3.2</a>) or by sending the preface directly (<a href="https://tools.ietf.org/html/rfc7540#section-3.4">RFC 7540 3.4</a>).</p>
+<p>Compatibility with HTTP/1.0 is provided by Cowboy&apos;s HTTP/1.1 implementation.</p>
+<h2 id="_secure_tls_listener">Secure TLS listener</h2>
+<p>The secure TLS listener will accept connections on the given port. A typical HTTPS server would listen on port 443. Port 443 requires special permissions on most platforms however so a common alternative is port 8443.</p>
+<!-- @todo Make a complete list of restrictions.-->
+<p>The function provided by Cowboy will ensure that the TLS options given are following the HTTP/2 RFC with regards to security. For example some TLS extensions or ciphers may be disabled. This also applies to HTTP/1.1 connections on this listener. If this is not desirable, Ranch can be used directly to set up a custom listener.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">start</font></b>(<font color="#009900">_Type</font>, <font color="#009900">_Args</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+        {<font color="#FF6600">'_'</font>, [{<font color="#FF0000">"/"</font>, <font color="#FF6600">hello_handler</font>, []}]}
+    ]),
+    {<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_tls</font></b>(<font color="#FF6600">my_https_listener</font>,
+        [
+            {<font color="#FF6600">port</font>, <font color="#993399">8443</font>},
+            {<font color="#FF6600">certfile</font>, <font color="#FF0000">"/path/to/certfile"</font>},
+            {<font color="#FF6600">keyfile</font>, <font color="#FF0000">"/path/to/keyfile"</font>}
+        ],
+        #{<font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}}
+    ),
+    <b><font color="#000000">hello_erlang_sup:start_link</font></b>()<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Clients connecting to Cowboy on the secure listener are expected to use the ALPN TLS extension to indicate what protocols they understand. Cowboy always prefers HTTP/2 over HTTP/1.1 when both are supported. When neither are supported by the client, or when the ALPN extension was missing, Cowboy expects HTTP/1.1 to be used.</p>
+<p>Cowboy also advertises HTTP/2 support through the older NPN TLS extension for compatibility. Note however that this support will likely not be enabled by default when Cowboy 2.0 gets released.</p>
+<p>Compatibility with HTTP/1.0 is provided by Cowboy&apos;s HTTP/1.1 implementation.</p>
+<h2 id="_stopping_the_listener">Stopping the listener</h2>
+<p>When starting listeners along with the application it is a good idea to also stop the listener when the application stops. This can be done by calling <code>cowboy:stop_listener/1</code> in the application&apos;s stop function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">stop</font></b>(<font color="#009900">_State</font>) <font color="#990000">-&gt;</font>
+    <font color="#0000FF">ok</font> <font color="#990000">=</font> <b><font color="#000000">cowboy:stop_listener</font></b>(<font color="#FF6600">my_http_listener</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_protocol_configuration">Protocol configuration</h2>
+<p>The HTTP/1.1 and HTTP/2 protocols share the same semantics; only their framing differs. The first is a text protocol and the second a binary protocol.</p>
+<p>Cowboy doesn&apos;t separate the configuration for HTTP/1.1 and HTTP/2. Everything goes into the same map. Many options are shared.</p>
+<!-- @todo Describe good to know options for both protocols?-->
+<!-- Maybe do that in separate chapters?-->
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/flow_diagram/">
+					Flow diagram
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/routing/">
+					Routing
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/guide/loop_handlers.asciidoc b/docs/en/cowboy/2.13/guide/loop_handlers.asciidoc
new file mode 100644
index 00000000..fc45d1c6
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/loop_handlers.asciidoc
@@ -0,0 +1,150 @@
+[[loop_handlers]]
+== Loop handlers
+
+Loop handlers are a special kind of HTTP handlers used when the
+response can not be sent right away. The handler enters instead
+a receive loop waiting for the right message before it can send
+a response.
+
+Loop handlers are used for requests where a response might not
+be immediately available, but where you would like to keep the
+connection open for a while in case the response arrives. The
+most known example of such practice is known as long polling.
+
+Loop handlers can also be used for requests where a response is
+partially available and you need to stream the response body
+while the connection is open. The most known example of such
+practice is server-sent events, but it also applies to any
+response that takes a long time to send.
+
+While the same can be accomplished using plain HTTP handlers,
+it is recommended to use loop handlers because they are well-tested
+and allow using built-in features like hibernation and timeouts.
+
+Loop handlers essentially wait for one or more Erlang messages
+and feed these messages to the `info/3` callback. It also features
+the `init/2` and `terminate/3` callbacks which work the same as
+for plain HTTP handlers.
+
+=== Initialization
+
+The `init/2` function must return a `cowboy_loop` tuple to enable
+loop handler behavior. This tuple may optionally contain
+the atom `hibernate` to make the process enter hibernation
+until a message is received. Alternatively, the tuple may
+optionally contain a positive integer to create a `timeout`
+message when the process has not received messages for too
+long.
+
+This snippet enables the loop handler:
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_loop, Req, State}.
+----
+
+This also makes the process hibernate:
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_loop, Req, State, hibernate}.
+----
+
+This makes the process time out after 1000ms of idle time.
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_loop, Req, State, 1000}.
+----
+
+=== Receive loop
+
+Once initialized, Cowboy will wait for messages to arrive
+in the process' mailbox. When a message arrives, Cowboy
+calls the `info/3` function with the message, the Req object
+and the handler's state.
+
+The following snippet sends a reply when it receives a
+`reply` message from another process, or waits for another
+message otherwise.
+
+[source,erlang]
+----
+info({reply, Body}, Req, State) ->
+    cowboy_req:reply(200, #{}, Body, Req),
+    {stop, Req, State};
+info(_Msg, Req, State) ->
+    {ok, Req, State, hibernate}.
+----
+
+Do note that the `reply` tuple here may be any message
+and is simply an example.
+
+This callback may perform any necessary operation including
+sending all or parts of a reply, and will subsequently
+return a tuple indicating if more messages are to be expected.
+
+The callback may also choose to do nothing at all and just
+skip the message received.
+
+If a reply is sent, then the `stop` tuple should be returned.
+This will instruct Cowboy to end the request.
+
+Otherwise an `ok` tuple should be returned.
+
+=== Streaming loop
+
+Another common case well suited for loop handlers is
+streaming data received in the form of Erlang messages.
+This can be done by initiating a chunked reply in the
+`init/2` callback and then using `cowboy_req:chunk/2`
+every time a message is received.
+
+The following snippet does exactly that. As you can see
+a chunk is sent every time an `event` message is received,
+and the loop is stopped by sending an `eof` message.
+
+[source,erlang]
+----
+init(Req, State) ->
+    Req2 = cowboy_req:stream_reply(200, Req),
+    {cowboy_loop, Req2, State}.
+
+info(eof, Req, State) ->
+    {stop, Req, State};
+info({event, Data}, Req, State) ->
+    cowboy_req:stream_body(Data, nofin, Req),
+    {ok, Req, State};
+info(_Msg, Req, State) ->
+    {ok, Req, State}.
+----
+
+=== Cleaning up
+
+Please refer to the xref:handlers[Handlers chapter]
+for general instructions about cleaning up.
+
+=== Hibernate
+
+To save memory, you may hibernate the process in between
+messages received. This is done by returning the atom
+`hibernate` as part of the `loop` tuple callbacks normally
+return. Just add the atom at the end and Cowboy will hibernate
+accordingly.
+
+=== Idle timeout
+
+You may activate timeout events by returning a positive integer
+`N` as part of the `loop` tuple callbacks return. The default
+value is `infinity`. The `info` callback will be called with the
+atom `timeout` unless a message is received within `N` milliseconds:
+
+[source,erlang]
+----
+info(timeout, Req, State) ->
+    %% Do something...
+    {ok, Req, State, 1000}.
+----
diff --git a/docs/en/cowboy/2.13/guide/loop_handlers/index.html b/docs/en/cowboy/2.13/guide/loop_handlers/index.html
new file mode 100644
index 00000000..ef57aeb3
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/loop_handlers/index.html
@@ -0,0 +1,266 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Loop handlers</span></h1>
+
+<p>Loop handlers are a special kind of HTTP handlers used when the response can not be sent right away. The handler enters instead a receive loop waiting for the right message before it can send a response.</p>
+<p>Loop handlers are used for requests where a response might not be immediately available, but where you would like to keep the connection open for a while in case the response arrives. The most known example of such practice is known as long polling.</p>
+<p>Loop handlers can also be used for requests where a response is partially available and you need to stream the response body while the connection is open. The most known example of such practice is server-sent events, but it also applies to any response that takes a long time to send.</p>
+<p>While the same can be accomplished using plain HTTP handlers, it is recommended to use loop handlers because they are well-tested and allow using built-in features like hibernation and timeouts.</p>
+<p>Loop handlers essentially wait for one or more Erlang messages and feed these messages to the <code>info/3</code> callback. It also features the <code>init/2</code> and <code>terminate/3</code> callbacks which work the same as for plain HTTP handlers.</p>
+<h2 id="_initialization">Initialization</h2>
+<p>The <code>init/2</code> function must return a <code>cowboy_loop</code> tuple to enable loop handler behavior. This tuple may optionally contain the atom <code>hibernate</code> to make the process enter hibernation until a message is received. Alternatively, the tuple may optionally contain a positive integer to create a <code>timeout</code> message when the process has not received messages for too long.</p>
+<p>This snippet enables the loop handler:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_loop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>This also makes the process hibernate:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_loop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>This makes the process time out after 1000ms of idle time.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_loop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#993399">1000</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_receive_loop">Receive loop</h2>
+<p>Once initialized, Cowboy will wait for messages to arrive in the process&apos; mailbox. When a message arrives, Cowboy calls the <code>info/3</code> function with the message, the Req object and the handler&apos;s state.</p>
+<p>The following snippet sends a reply when it receives a <code>reply</code> message from another process, or waits for another message otherwise.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">info</font></b>({<font color="#FF6600">reply</font>, <font color="#009900">Body</font>}, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{}, <font color="#009900">Body</font>, <font color="#009900">Req</font>),
+    {<font color="#FF6600">stop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>};
+<b><font color="#000000">info</font></b>(<font color="#009900">_Msg</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Do note that the <code>reply</code> tuple here may be any message and is simply an example.</p>
+<p>This callback may perform any necessary operation including sending all or parts of a reply, and will subsequently return a tuple indicating if more messages are to be expected.</p>
+<p>The callback may also choose to do nothing at all and just skip the message received.</p>
+<p>If a reply is sent, then the <code>stop</code> tuple should be returned. This will instruct Cowboy to end the request.</p>
+<p>Otherwise an <code>ok</code> tuple should be returned.</p>
+<h2 id="_streaming_loop">Streaming loop</h2>
+<p>Another common case well suited for loop handlers is streaming data received in the form of Erlang messages. This can be done by initiating a chunked reply in the <code>init/2</code> callback and then using <code>cowboy_req:chunk/2</code> every time a message is received.</p>
+<p>The following snippet does exactly that. As you can see a chunk is sent every time an <code>event</code> message is received, and the loop is stopped by sending an <code>eof</code> message.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Req2</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, <font color="#009900">Req</font>),
+    {<font color="#FF6600">cowboy_loop</font>, <font color="#009900">Req2</font>, <font color="#009900">State</font>}<font color="#990000">.</font>
+
+<b><font color="#000000">info</font></b>(<font color="#FF6600">eof</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">stop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>};
+<b><font color="#000000">info</font></b>({<font color="#FF6600">event</font>, <font color="#009900">Data</font>}, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#009900">Data</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>};
+<b><font color="#000000">info</font></b>(<font color="#009900">_Msg</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_cleaning_up">Cleaning up</h2>
+<p>Please refer to the <a href="../handlers">Handlers chapter</a> for general instructions about cleaning up.</p>
+<h2 id="_hibernate">Hibernate</h2>
+<p>To save memory, you may hibernate the process in between messages received. This is done by returning the atom <code>hibernate</code> as part of the <code>loop</code> tuple callbacks normally return. Just add the atom at the end and Cowboy will hibernate accordingly.</p>
+<h2 id="_idle_timeout">Idle timeout</h2>
+<p>You may activate timeout events by returning a positive integer <code>N</code> as part of the <code>loop</code> tuple callbacks return. The default value is <code>infinity</code>. The <code>info</code> callback will be called with the atom <code>timeout</code> unless a message is received within <code>N</code> milliseconds:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">info</font></b>(<font color="#FF6600">timeout</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <i><font color="#9A1900">%% Do something...</font></i>
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#993399">1000</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
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+	User Guide
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+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
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+</ul>
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+<h4>Version select</h4>
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+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/guide/middlewares.asciidoc b/docs/en/cowboy/2.13/guide/middlewares.asciidoc
new file mode 100644
index 00000000..e6be30dd
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/middlewares.asciidoc
@@ -0,0 +1,69 @@
+[[middlewares]]
+== Middlewares
+
+Cowboy delegates the request processing to middleware components.
+By default, two middlewares are defined, for the routing and handling
+of the request, as is detailed in most of this guide.
+
+Middlewares give you complete control over how requests are to be
+processed. You can add your own middlewares to the mix or completely
+change the chain of middlewares as needed.
+
+Cowboy will execute all middlewares in the given order, unless one
+of them decides to stop processing.
+
+=== Usage
+
+Middlewares only need to implement a single callback: `execute/2`.
+It is defined in the `cowboy_middleware` behavior.
+
+This callback has two arguments. The first is the `Req` object.
+The second is the environment.
+
+Middlewares can return one of three different values:
+
+* `{ok, Req, Env}` to continue the request processing
+* `{suspend, Module, Function, Args}` to hibernate
+* `{stop, Req}` to stop processing and move on to the next request
+
+Of note is that when hibernating, processing will resume on the given
+MFA, discarding all previous stacktrace. Make sure you keep the `Req`
+and `Env` in the arguments of this MFA for later use.
+
+If an error happens during middleware processing, Cowboy will not try
+to send an error back to the socket, the process will just crash. It
+is up to the middleware to make sure that a reply is sent if something
+goes wrong.
+
+=== Configuration
+
+The middleware environment is defined as the `env` protocol option.
+In the previous chapters we saw it briefly when we needed to pass
+the routing information. It is a list of tuples with the first
+element being an atom and the second any Erlang term.
+
+Two values in the environment are reserved:
+
+* `listener` contains the name of the listener
+* `result` contains the result of the processing
+
+The `listener` value is always defined. The `result` value can be
+set by any middleware. If set to anything other than `ok`, Cowboy
+will not process any subsequent requests on this connection.
+
+The middlewares that come with Cowboy may define or require other
+environment values to perform.
+
+You can update the environment by calling the `cowboy:set_env/3`
+convenience function, adding or replacing a value in the environment.
+
+=== Routing middleware
+
+The routing middleware requires the `dispatch` value. If routing
+succeeds, it will put the handler name and options in the `handler`
+and `handler_opts` values of the environment, respectively.
+
+=== Handler middleware
+
+The handler middleware requires the `handler` and `handler_opts`
+values. It puts the result of the request handling into `result`.
diff --git a/docs/en/cowboy/2.13/guide/middlewares/index.html b/docs/en/cowboy/2.13/guide/middlewares/index.html
new file mode 100644
index 00000000..13364361
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+
+<h1 class="lined-header"><span>Middlewares</span></h1>
+
+<p>Cowboy delegates the request processing to middleware components. By default, two middlewares are defined, for the routing and handling of the request, as is detailed in most of this guide.</p>
+<p>Middlewares give you complete control over how requests are to be processed. You can add your own middlewares to the mix or completely change the chain of middlewares as needed.</p>
+<p>Cowboy will execute all middlewares in the given order, unless one of them decides to stop processing.</p>
+<h2 id="_usage">Usage</h2>
+<p>Middlewares only need to implement a single callback: <code>execute/2</code>. It is defined in the <code>cowboy_middleware</code> behavior.</p>
+<p>This callback has two arguments. The first is the <code>Req</code> object. The second is the environment.</p>
+<p>Middlewares can return one of three different values:</p>
+<ul><li><code>{ok, Req, Env}</code> to continue the request processing
+</li>
+<li><code>{suspend, Module, Function, Args}</code> to hibernate
+</li>
+<li><code>{stop, Req}</code> to stop processing and move on to the next request
+</li>
+</ul>
+<p>Of note is that when hibernating, processing will resume on the given MFA, discarding all previous stacktrace. Make sure you keep the <code>Req</code> and <code>Env</code> in the arguments of this MFA for later use.</p>
+<p>If an error happens during middleware processing, Cowboy will not try to send an error back to the socket, the process will just crash. It is up to the middleware to make sure that a reply is sent if something goes wrong.</p>
+<h2 id="_configuration">Configuration</h2>
+<p>The middleware environment is defined as the <code>env</code> protocol option. In the previous chapters we saw it briefly when we needed to pass the routing information. It is a list of tuples with the first element being an atom and the second any Erlang term.</p>
+<p>Two values in the environment are reserved:</p>
+<ul><li><code>listener</code> contains the name of the listener
+</li>
+<li><code>result</code> contains the result of the processing
+</li>
+</ul>
+<p>The <code>listener</code> value is always defined. The <code>result</code> value can be set by any middleware. If set to anything other than <code>ok</code>, Cowboy will not process any subsequent requests on this connection.</p>
+<p>The middlewares that come with Cowboy may define or require other environment values to perform.</p>
+<p>You can update the environment by calling the <code>cowboy:set_env/3</code> convenience function, adding or replacing a value in the environment.</p>
+<h2 id="_routing_middleware">Routing middleware</h2>
+<p>The routing middleware requires the <code>dispatch</code> value. If routing succeeds, it will put the handler name and options in the <code>handler</code> and <code>handler_opts</code> values of the environment, respectively.</p>
+<h2 id="_handler_middleware">Handler middleware</h2>
+<p>The handler middleware requires the <code>handler</code> and <code>handler_opts</code> values. It puts the result of the request handling into <code>result</code>.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/streams/">
+					Streams
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/performance/">
+					Performance
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/guide/migrating_from_1.0.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_1.0.asciidoc
new file mode 100644
index 00000000..4f4ea5bf
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_1.0.asciidoc
@@ -0,0 +1,214 @@
+[appendix]
+== Migrating from Cowboy 1.0 to 2.0
+
+A lot has changed between Cowboy 1.0 and 2.0. The `cowboy_req`
+interface in particular has seen a massive revamp. Hooks are
+gone, their functionality can now be achieved via stream
+handlers.
+
+The documentation has seen great work, in particular the
+manual. Each module and each function now has its own dedicated
+manual page with full details and examples.
+
+=== Compatibility
+
+Compatibility with Erlang/OTP R16, 17 and 18 has been dropped.
+Erlang/OTP 19.0 or above is required. It is non-trivial to
+make Cowboy 2.0 work with older Erlang/OTP versions.
+
+Cowboy 2.0 is not compatible with Cowlib versions older than
+2.0. It should be compatible with Ranch 1.0 or above, however
+it has not been tested with Ranch versions older than 1.4.
+
+Cowboy 2.0 is tested on Arch Linux, Ubuntu, FreeBSD, Windows
+and OSX. It is tested with every point release (latest patch
+release) and also with HiPE on the most recent release.
+
+Cowboy 2.0 now comes with Erlang.mk templates.
+
+=== Features added
+
+* The HTTP/2 protocol is now supported.
+
+* Cowboy no longer uses only one process per connection.
+  It now uses one process per connection plus one process
+  per request by default. This is necessary for HTTP/2.
+  There might be a slight drop in performance for HTTP/1.1
+  connections due to this change.
+
+* Cowboy internals have largely been reworked in order to
+  support HTTP/2. This opened the way to stream handlers,
+  which are a chain of modules that are called whenever
+  something happens relating to a request/response.
+
+* The `cowboy_stream_h` stream handler has been added.
+  It provides most of Cowboy's default behavior.
+
+* The `cowboy_compress_h` stream handler has been added.
+  It compresses responses when possible. It's worth noting
+  that it compresses in more cases than Cowboy 1.0 ever did.
+
+* Because of the many changes in the internals of Cowboy,
+  many options have been added or modified. Of note is that
+  the Websocket options are now given per handler rather
+  than for the entire listener.
+
+* Websocket permessage-deflate compression is now supported
+  via the `compress` option.
+
+* Static file handlers will now correctly find files found
+  in '.ez' archives.
+
+* Constraints have been generalized and are now used not only
+  in the router but also in some `cowboy_req` functions. Their
+  interface has also been modified to allow for reverse
+  operations and formatting of errors.
+
+=== Features removed
+
+* SPDY support has been removed. Use HTTP/2 instead.
+
+* Hooks have been removed. Use xref:streams[stream handlers] instead.
+
+* The undocumented `waiting_stream` hack has been removed.
+  It allowed disabling chunked transfer-encoding for HTTP/1.1.
+  It has no equivalent in Cowboy 2.0. Open a ticket if necessary.
+
+* Sub protocols still exist, but their interface has largely changed
+  and they are no longer documented for the time being.
+
+=== Changed behaviors
+
+* The handler behaviors have been renamed and are now `cowboy_handler`,
+  `cowboy_loop`, `cowboy_rest` and `cowboy_websocket`.
+
+* Plain HTTP, loop, REST and Websocket handlers have had their
+  init and terminate callbacks unified. They now all use the
+  `init/2` and `terminate/3` callbacks. The latter is now optional.
+  The terminate reason has now been documented for all handlers.
+
+* The tuple returned to switch to a different handler type has
+  changed. It now takes the form `{Module, Req, State}` or
+  `{Module, Req, State, Opts}`, where `Opts` is a map of options
+  to configure the handler. The timeout and hibernate options
+  must now be specified using this map, where applicable.
+
+* All behaviors that used to accept `halt` or `shutdown` tuples
+  as a return value no longer do so. The return value is now
+  a `stop` tuple, consistent across Cowboy.
+
+* Middlewares can no longer return an `error` tuple. They have
+  to send the response and return a `stop` tuple instead.
+
+* The `known_content_type` REST handler callback has been removed
+  as it was found unnecessary.
+
+* Websocket handlers have both the normal `init/2` and
+  an optional `websocket_init/1` function. The reason for
+  that exception is that the `websocket_*` callbacks execute
+  in a separate process from the `init/2` callback, and it
+  was therefore not obvious how timers or monitors should
+  be setup properly. They are effectively initializing the
+  handler before and after the HTTP/1.1 upgrade.
+
+* Websocket handlers can now send frames directly from
+  `websocket_init/1`. The frames will be sent immediately
+  after the handshake.
+
+* Websocket handler callbacks no longer receive the Req
+  argument. The `init/2` callback still receives it and
+  can be used to extract relevant information. The `terminate/3`
+  callback, if implemented, may still receive the Req
+  (see next bullet point).
+
+* Websocket handlers have a new `req_filter` option that
+  can be used to customize how much information should be
+  discarded from the Req object after the handshake. Note
+  that the Req object is only available in `terminate/3`
+  past that point.
+
+* Websocket handlers have their timeout default changed
+  from infinity to 60 seconds.
+
+=== New functions
+
+* The `cowboy_req:scheme/1` function has been added.
+
+* The `cowboy_req:uri/1,2` function has been added, replacing the
+  less powerful functions `cowboy_req:url/1` and `cowboy_req:host_url/1`.
+
+* The functions `cowboy_req:match_qs/2` and `cowboy_req:match_cookies/2`
+  allow matching query string and cookies against constraints.
+
+* The function `cowboy_req:set_resp_cookie/3` has been added to
+  complement `cowboy_req:set_resp_cookie/4`.
+
+* The functions `cowboy_req:resp_header/2,3` and `cowboy_req:resp_headers/1`
+  have been added. They can be used to retrieve response headers
+  that were previously set.
+
+* The function `cowboy_req:set_resp_headers/2` has been added. It
+  allows setting many response headers at once.
+
+* The functions `cowboy_req:push/3,4` can be used to push resources
+  for protocols that support it (by default only HTTP/2).
+
+=== Changed functions
+
+* The `cowboy:start_http/4` function was renamed to `cowboy:start_clear/3`.
+
+* The `cowboy:start_https/4` function was renamed to `cowboy:start_tls/3`.
+
+* Most, if not all, functions in the `cowboy_req` module have been modified.
+  Please consult the changelog of each individual functions. The changes
+  are mainly about simplifying and clarifying the interface. The Req is no
+  longer returned when not necessary, maps are used wherever possible,
+  and some functions have been renamed.
+
+* The position of the `Opts` argument for `cowboy_req:set_resp_cookie/4`
+  has changed to improve consistency. It is now the last argument.
+
+=== Removed functions
+
+* The functions `cowboy_req:url/1` and `cowboy_req:host_url/1` have been
+  removed in favor of the new function `cowboy_req:uri/1,2`.
+
+* The functions `cowboy_req:meta/2,3` and `cowboy_req:set_meta/3` have
+  been removed. The Req object is now a public map, therefore they became
+  unnecessary.
+
+* The functions `cowboy_req:set_resp_body_fun/2,3` have been removed.
+  For sending files, the function `cowboy_req:set_resp_body/2` can now
+  take a sendfile tuple.
+
+* Remove many undocumented functions from `cowboy_req`, including the
+  functions `cowboy_req:get/2` and `cowboy_req:set/3`.
+
+=== Other changes
+
+* The correct percent-decoding algorithm is now used for path elements
+  during routing. It will no longer decode `+` characters.
+
+* The router will now properly handle path segments `.` and `..`.
+
+* Routing behavior has changed for URIs containing latin1 characters.
+  They are no longer allowed. URIs are expected to be in UTF-8 once
+  they are percent-decoded.
+
+* Clients that send multiple headers of the same name
+  will have the values of those headers concatenated into a
+  comma-separated list. This is of special importance in the
+  case of the content-type header, as previously only the
+  first value was used in the `content_types_accepted/2` step
+  in REST handlers.
+
+* Etag comparison in REST handlers has been fixed. Some requests may
+  now fail when they succeeded in the past.
+
+* The `If-*-Since` headers are now ignored in REST handlers if
+  the corresponding `If*-Match` header exist. The former is
+  largely a backward compatible header and this shouldn't create
+  any issue. The new behavior follows the current RFCs more closely.
+
+* The static file handler has been improved to handle more special
+  characters on systems that accept them.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_1.0/index.html b/docs/en/cowboy/2.13/guide/migrating_from_1.0/index.html
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--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_1.0/index.html
@@ -0,0 +1,297 @@
+<!DOCTYPE html>
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+
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+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 1.0 to 2.0</span></h1>
+
+<p>A lot has changed between Cowboy 1.0 and 2.0. The <code>cowboy_req</code> interface in particular has seen a massive revamp. Hooks are gone, their functionality can now be achieved via stream handlers.</p>
+<p>The documentation has seen great work, in particular the manual. Each module and each function now has its own dedicated manual page with full details and examples.</p>
+<h2 id="_compatibility">Compatibility</h2>
+<p>Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erlang/OTP 19.0 or above is required. It is non-trivial to make Cowboy 2.0 work with older Erlang/OTP versions.</p>
+<p>Cowboy 2.0 is not compatible with Cowlib versions older than 2.0. It should be compatible with Ranch 1.0 or above, however it has not been tested with Ranch versions older than 1.4.</p>
+<p>Cowboy 2.0 is tested on Arch Linux, Ubuntu, FreeBSD, Windows and OSX. It is tested with every point release (latest patch release) and also with HiPE on the most recent release.</p>
+<p>Cowboy 2.0 now comes with Erlang.mk templates.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>The HTTP/2 protocol is now supported.
+</li>
+<li>Cowboy no longer uses only one process per connection. It now uses one process per connection plus one process per request by default. This is necessary for HTTP/2. There might be a slight drop in performance for HTTP/1.1 connections due to this change.
+</li>
+<li>Cowboy internals have largely been reworked in order to support HTTP/2. This opened the way to stream handlers, which are a chain of modules that are called whenever something happens relating to a request/response.
+</li>
+<li>The <code>cowboy_stream_h</code> stream handler has been added. It provides most of Cowboy&apos;s default behavior.
+</li>
+<li>The <code>cowboy_compress_h</code> stream handler has been added. It compresses responses when possible. It&apos;s worth noting that it compresses in more cases than Cowboy 1.0 ever did.
+</li>
+<li>Because of the many changes in the internals of Cowboy, many options have been added or modified. Of note is that the Websocket options are now given per handler rather than for the entire listener.
+</li>
+<li>Websocket permessage-deflate compression is now supported via the <code>compress</code> option.
+</li>
+<li>Static file handlers will now correctly find files found in <em>.ez</em> archives.
+</li>
+<li>Constraints have been generalized and are now used not only in the router but also in some <code>cowboy_req</code> functions. Their interface has also been modified to allow for reverse operations and formatting of errors.
+</li>
+</ul>
+<h2 id="_features_removed">Features removed</h2>
+<ul><li>SPDY support has been removed. Use HTTP/2 instead.
+</li>
+<li>Hooks have been removed. Use <a href="../streams">stream handlers</a> instead.
+</li>
+<li>The undocumented <code>waiting_stream</code> hack has been removed. It allowed disabling chunked transfer-encoding for HTTP/1.1. It has no equivalent in Cowboy 2.0. Open a ticket if necessary.
+</li>
+<li>Sub protocols still exist, but their interface has largely changed and they are no longer documented for the time being.
+</li>
+</ul>
+<h2 id="_changed_behaviors">Changed behaviors</h2>
+<ul><li>The handler behaviors have been renamed and are now <code>cowboy_handler</code>, <code>cowboy_loop</code>, <code>cowboy_rest</code> and <code>cowboy_websocket</code>.
+</li>
+<li>Plain HTTP, loop, REST and Websocket handlers have had their init and terminate callbacks unified. They now all use the <code>init/2</code> and <code>terminate/3</code> callbacks. The latter is now optional. The terminate reason has now been documented for all handlers.
+</li>
+<li>The tuple returned to switch to a different handler type has changed. It now takes the form <code>{Module, Req, State}</code> or <code>{Module, Req, State, Opts}</code>, where <code>Opts</code> is a map of options to configure the handler. The timeout and hibernate options must now be specified using this map, where applicable.
+</li>
+<li>All behaviors that used to accept <code>halt</code> or <code>shutdown</code> tuples as a return value no longer do so. The return value is now a <code>stop</code> tuple, consistent across Cowboy.
+</li>
+<li>Middlewares can no longer return an <code>error</code> tuple. They have to send the response and return a <code>stop</code> tuple instead.
+</li>
+<li>The <code>known_content_type</code> REST handler callback has been removed as it was found unnecessary.
+</li>
+<li>Websocket handlers have both the normal <code>init/2</code> and an optional <code>websocket_init/1</code> function. The reason for that exception is that the <code>websocket_*</code> callbacks execute in a separate process from the <code>init/2</code> callback, and it was therefore not obvious how timers or monitors should be setup properly. They are effectively initializing the handler before and after the HTTP/1.1 upgrade.
+</li>
+<li>Websocket handlers can now send frames directly from <code>websocket_init/1</code>. The frames will be sent immediately after the handshake.
+</li>
+<li>Websocket handler callbacks no longer receive the Req argument. The <code>init/2</code> callback still receives it and can be used to extract relevant information. The <code>terminate/3</code> callback, if implemented, may still receive the Req (see next bullet point).
+</li>
+<li>Websocket handlers have a new <code>req_filter</code> option that can be used to customize how much information should be discarded from the Req object after the handshake. Note that the Req object is only available in <code>terminate/3</code> past that point.
+</li>
+<li>Websocket handlers have their timeout default changed from infinity to 60 seconds.
+</li>
+</ul>
+<h2 id="_new_functions">New functions</h2>
+<ul><li>The <code>cowboy_req:scheme/1</code> function has been added.
+</li>
+<li>The <code>cowboy_req:uri/1,2</code> function has been added, replacing the less powerful functions <code>cowboy_req:url/1</code> and <code>cowboy_req:host_url/1</code>.
+</li>
+<li>The functions <code>cowboy_req:match_qs/2</code> and <code>cowboy_req:match_cookies/2</code> allow matching query string and cookies against constraints.
+</li>
+<li>The function <code>cowboy_req:set_resp_cookie/3</code> has been added to complement <code>cowboy_req:set_resp_cookie/4</code>.
+</li>
+<li>The functions <code>cowboy_req:resp_header/2,3</code> and <code>cowboy_req:resp_headers/1</code> have been added. They can be used to retrieve response headers that were previously set.
+</li>
+<li>The function <code>cowboy_req:set_resp_headers/2</code> has been added. It allows setting many response headers at once.
+</li>
+<li>The functions <code>cowboy_req:push/3,4</code> can be used to push resources for protocols that support it (by default only HTTP/2).
+</li>
+</ul>
+<h2 id="_changed_functions">Changed functions</h2>
+<ul><li>The <code>cowboy:start_http/4</code> function was renamed to <code>cowboy:start_clear/3</code>.
+</li>
+<li>The <code>cowboy:start_https/4</code> function was renamed to <code>cowboy:start_tls/3</code>.
+</li>
+<li>Most, if not all, functions in the <code>cowboy_req</code> module have been modified. Please consult the changelog of each individual functions. The changes are mainly about simplifying and clarifying the interface. The Req is no longer returned when not necessary, maps are used wherever possible, and some functions have been renamed.
+</li>
+<li>The position of the <code>Opts</code> argument for <code>cowboy_req:set_resp_cookie/4</code> has changed to improve consistency. It is now the last argument.
+</li>
+</ul>
+<h2 id="_removed_functions">Removed functions</h2>
+<ul><li>The functions <code>cowboy_req:url/1</code> and <code>cowboy_req:host_url/1</code> have been removed in favor of the new function <code>cowboy_req:uri/1,2</code>.
+</li>
+<li>The functions <code>cowboy_req:meta/2,3</code> and <code>cowboy_req:set_meta/3</code> have been removed. The Req object is now a public map, therefore they became unnecessary.
+</li>
+<li>The functions <code>cowboy_req:set_resp_body_fun/2,3</code> have been removed. For sending files, the function <code>cowboy_req:set_resp_body/2</code> can now take a sendfile tuple.
+</li>
+<li>Remove many undocumented functions from <code>cowboy_req</code>, including the functions <code>cowboy_req:get/2</code> and <code>cowboy_req:set/3</code>.
+</li>
+</ul>
+<h2 id="_other_changes">Other changes</h2>
+<ul><li>The correct percent-decoding algorithm is now used for path elements during routing. It will no longer decode <code>+</code> characters.
+</li>
+<li>The router will now properly handle path segments <code>.</code> and <code>..</code>.
+</li>
+<li>Routing behavior has changed for URIs containing latin1 characters. They are no longer allowed. URIs are expected to be in UTF-8 once they are percent-decoded.
+</li>
+<li>Clients that send multiple headers of the same name will have the values of those headers concatenated into a comma-separated list. This is of special importance in the case of the content-type header, as previously only the first value was used in the <code>content_types_accepted/2</code> step in REST handlers.
+</li>
+<li>Etag comparison in REST handlers has been fixed. Some requests may now fail when they succeeded in the past.
+</li>
+<li>The <code>If-*-Since</code> headers are now ignored in REST handlers if the corresponding <code>If*-Match</code> header exist. The former is largely a backward compatible header and this shouldn&apos;t create any issue. The new behavior follows the current RFCs more closely.
+</li>
+<li>The static file handler has been improved to handle more special characters on systems that accept them.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.0/">
+					Migrating from Cowboy 2.0 to 2.1
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/specs/">
+					HTTP and other specifications
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.0.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.0.asciidoc
new file mode 100644
index 00000000..c76430c2
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.0.asciidoc
@@ -0,0 +1,107 @@
+[appendix]
+== Migrating from Cowboy 2.0 to 2.1
+
+Cowboy 2.1 focused on adding features that were temporarily
+removed in Cowboy 2.0. A number of bugs found in the 2.0
+release were also fixed.
+
+=== Features added
+
+* It is now possible to obtain the client TLS certificate
+  and the local IP/port for the connection from the Req object.
+
+* Informational responses (1XX responses) can now be sent.
+  They must be sent before initiating the final response.
+
+* The `expect: 100-continue` header is now handled
+  automatically. The 100 response will be sent on the
+  first `cowboy_req:read_body/2,3,4` call. This only applies
+  when using the default `cowboy_stream_h` stream handler.
+
+=== Experimental features added
+
+Experimental features are previews of features that will be
+added in a future release. They are not documented and their
+interface may change at any time. You are welcome to try them
+and provide feedback.
+
+* The `cowboy_metrics_h` stream handler can be used to
+  extract metrics out of Cowboy. It must be used first in
+  the list of stream handlers, and will record all events
+  related to requests, responses and spawned processes.
+  When the stream terminates it will pass this information
+  to a user-defined callback.
+
+* The `cowboy_tracer_h` stream handler can be used to setup
+  automatic tracing of specific requests. You can conditionally
+  enable tracing based on a function, header, path or any other
+  element from the request and the trace will apply to the
+  entire connection and any processes created by it. This is
+  meant to be used for debugging both in tests and production.
+
+=== Changed behaviors
+
+* The `cowboy_rest` handler now implements a mechanism for
+  switching to a different type of handler from any callback
+  where `stop` is also allowed. Switch by returning
+  `{switch_handler, Module}` or `{switch_handler, Module, Opts}`.
+  This is especially useful for switching to `cowboy_loop`
+  for streaming the request or response body.
+
+* REST callbacks that do not allow `stop` as a return value
+  are now explicitly listed in the documentation.
+
+=== New functions
+
+* The function `cowboy_req:sock/1` returns the IP/port
+  of the local socket.
+
+* The function `cowboy_req:cert/1` returns the client
+  TLS certificate or `undefined` if it isn't available.
+
+* The function `cowboy_req:inform/2,3` sends an
+  informational response.
+
+=== Bugs fixed
+
+* Ensure HTTP/2 connections are not closed prematurely
+  when the user code does not read the request body.
+
+* Ensure HTTP/1.1 streams are not terminated too early.
+  Their behavior is now consistent with the HTTP/2 code
+  where the stream handler is only terminated when the
+  `stop` command is returned.
+
+* Sending zero-sized data from stream handlers or from
+  `cowboy_req:stream_body/3` could lead to issues with
+  HTTP/1.1. This has been fixed.
+
+* The final chunk sent by Cowboy when it terminates a
+  chunked body after the handler process exits was not
+  passed through stream handlers, which could lead to
+  issues when `cowboy_compress_h` was being used. This
+  is now corrected.
+
+* The stream handler state was discarded in some cases
+  where Cowboy had to send a response or response data
+  automatically when ending a stream. This has now
+  been corrected.
+
+* The stream handler callback `terminate/3` will now be
+  called when switching to another protocol using the
+  command `switch_protocol`. This doesn't apply when
+  doing upgrades to HTTP/2 as those occur before the
+  stream is initialized.
+
+* Cowlib has been updated to 2.0.1 to fix an issue with
+  Websocket compression when using Erlang/OTP 20.1. Note
+  that at the time of writing all 20.1 versions (from
+  20.1 to 20.1.4) have issues when compression is enabled.
+  It is expected to work properly from 20.1.5 onward. In
+  the meantime it is recommended to run the plain 20.1
+  release and disable Websocket compression, or use a
+  release before 20.1.
+
+* Cowboy will no longer crash when the `cowboy_clock`
+  process is not running. This can happen when Cowboy
+  is being restarted during upgrades, for example.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.0/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.0/index.html
new file mode 100644
index 00000000..faa0ea53
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.0/index.html
@@ -0,0 +1,232 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.0 to 2.1</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.0 to 2.1</span></h1>
+
+<p>Cowboy 2.1 focused on adding features that were temporarily removed in Cowboy 2.0. A number of bugs found in the 2.0 release were also fixed.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>It is now possible to obtain the client TLS certificate and the local IP/port for the connection from the Req object.
+</li>
+<li>Informational responses (1XX responses) can now be sent. They must be sent before initiating the final response.
+</li>
+<li>The <code>expect: 100-continue</code> header is now handled automatically. The 100 response will be sent on the first <code>cowboy_req:read_body/2,3,4</code> call. This only applies when using the default <code>cowboy_stream_h</code> stream handler.
+</li>
+</ul>
+<h2 id="_experimental_features_added">Experimental features added</h2>
+<p>Experimental features are previews of features that will be added in a future release. They are not documented and their interface may change at any time. You are welcome to try them and provide feedback.</p>
+<ul><li>The <code>cowboy_metrics_h</code> stream handler can be used to extract metrics out of Cowboy. It must be used first in the list of stream handlers, and will record all events related to requests, responses and spawned processes. When the stream terminates it will pass this information to a user-defined callback.
+</li>
+<li>The <code>cowboy_tracer_h</code> stream handler can be used to setup automatic tracing of specific requests. You can conditionally enable tracing based on a function, header, path or any other element from the request and the trace will apply to the entire connection and any processes created by it. This is meant to be used for debugging both in tests and production.
+</li>
+</ul>
+<h2 id="_changed_behaviors">Changed behaviors</h2>
+<ul><li>The <code>cowboy_rest</code> handler now implements a mechanism for switching to a different type of handler from any callback where <code>stop</code> is also allowed. Switch by returning <code>{switch_handler, Module}</code> or <code>{switch_handler, Module, Opts}</code>. This is especially useful for switching to <code>cowboy_loop</code> for streaming the request or response body.
+</li>
+<li>REST callbacks that do not allow <code>stop</code> as a return value are now explicitly listed in the documentation.
+</li>
+</ul>
+<h2 id="_new_functions">New functions</h2>
+<ul><li>The function <code>cowboy_req:sock/1</code> returns the IP/port of the local socket.
+</li>
+<li>The function <code>cowboy_req:cert/1</code> returns the client TLS certificate or <code>undefined</code> if it isn&apos;t available.
+</li>
+<li>The function <code>cowboy_req:inform/2,3</code> sends an informational response.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Ensure HTTP/2 connections are not closed prematurely when the user code does not read the request body.
+</li>
+<li>Ensure HTTP/1.1 streams are not terminated too early. Their behavior is now consistent with the HTTP/2 code where the stream handler is only terminated when the <code>stop</code> command is returned.
+</li>
+<li>Sending zero-sized data from stream handlers or from <code>cowboy_req:stream_body/3</code> could lead to issues with HTTP/1.1. This has been fixed.
+</li>
+<li>The final chunk sent by Cowboy when it terminates a chunked body after the handler process exits was not passed through stream handlers, which could lead to issues when <code>cowboy_compress_h</code> was being used. This is now corrected.
+</li>
+<li>The stream handler state was discarded in some cases where Cowboy had to send a response or response data automatically when ending a stream. This has now been corrected.
+</li>
+<li>The stream handler callback <code>terminate/3</code> will now be called when switching to another protocol using the command <code>switch_protocol</code>. This doesn&apos;t apply when doing upgrades to HTTP/2 as those occur before the stream is initialized.
+</li>
+<li>Cowlib has been updated to 2.0.1 to fix an issue with Websocket compression when using Erlang/OTP 20.1. Note that at the time of writing all 20.1 versions (from 20.1 to 20.1.4) have issues when compression is enabled. It is expected to work properly from 20.1.5 onward. In the meantime it is recommended to run the plain 20.1 release and disable Websocket compression, or use a release before 20.1.
+</li>
+<li>Cowboy will no longer crash when the <code>cowboy_clock</code> process is not running. This can happen when Cowboy is being restarted during upgrades, for example.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.1/">
+					Migrating from Cowboy 2.1 to 2.2
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_1.0/">
+					Migrating from Cowboy 1.0 to 2.0
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
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+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
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+
+    
+    <script src="/js/custom.js"></script>
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+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.1.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.1.asciidoc
new file mode 100644
index 00000000..3c0681ff
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.1.asciidoc
@@ -0,0 +1,107 @@
+[appendix]
+== Migrating from Cowboy 2.1 to 2.2
+
+Cowboy 2.2 focused on adding features required for writing
+gRPC servers and on completing test suites for the core
+HTTP RFCs, fixing many bugs along the way.
+
+=== Features added
+
+* Add support for sending trailers at the end of response bodies.
+  Trailers are additional header fields that may be sent after the
+  body to add more information to the response. Their usage is
+  required in gRPC servers. They are optional and may be discarded
+  in other scenarios (for example if the request goes through an
+  HTTP/1.0 proxy, as HTTP/1.0 does not support trailers).
+
+* The `max_skip_body_length` option was added to `cowboy_http`.
+  It controls how much of a request body Cowboy is willing to skip
+  when the handler did not touch it. If the remaining body size is
+  too large Cowboy instead closes the connection. It defaults to 1MB.
+
+* The CONNECT and TRACE methods are now rejected as they are
+  currently not implemented and must be handled differently than
+  other methods. They will be implemented in a future release.
+
+=== New functions
+
+* The function `stream_trailers/2` has been added. It terminates
+  a stream and adds trailer fields at the end of the response. A
+  corresponding stream handler command `{trailers, Trailers}`
+  has also been added.
+
+=== Bugs fixed
+
+* Test suites for the core HTTP RFCs RFC7230, RFC7231 and RFC7540
+  have been completed. Many of the bugs listed here were fixed as
+  a result of this work.
+
+* Many HTTP/2 edge cases when clients are misbehaving have been
+  corrected. This includes many cases where the request is malformed
+  (for example when a pseudo-header is present twice).
+
+* When the HTTP/2 SETTINGS_INITIAL_WINDOW_SIZE value changes,
+  Cowboy now properly updates the flow control windows.
+
+* HTTP/2 could mistakenly log stray messages that actually were
+  expected. This is no longer the case.
+
+* We no longer send a GOAWAY frame when the HTTP/2 preface is invalid.
+
+* Some values in the Req object of pushed requests were in the
+  wrong type. They are now the expected binary instead of iolist.
+
+* A response body was sometimes sent in response to HEAD requests
+  when using HTTP/2. The body is now ignored.
+
+* The `max_headers` option for `cowboy_http` was not always respected
+  depending on the contents of the buffer. The limit is now strict.
+
+* When an early error occurred on the HTTP/1.1 request line, the
+  partial Req given to stream handlers was missing the `ref` and
+  `peer` information. This has been corrected.
+
+* Absolute URIs with a userinfo component, or without an authority
+  component, are now properly rejected for HTTP/1.0 and HTTP/1.1.
+
+* Whitespace is no longer allowed in header lines before the colon.
+
+* 408 responses to HTTP/1.1 requests now properly include a
+  connection: close header indicating that we are going to
+  close the connection. This header will also be sent for
+  other early errors resulting in the closing of the connection.
+
+* When both the transfer-encoding and content-length headers are
+  sent in an HTTP/1.1 request, the transfer-encoding now takes
+  precedence over the content-length header and the latter is
+  removed from the Req object.
+
+* A 400 response is now returned when the transfer-encoding
+  header is invalid or contains any transfer-coding other
+  than chunked.
+
+* Invalid chunk sizes are now rejected immediately.
+
+* Chunk extensions are now limited to 129 characters. They are
+  not used in practice and are still ignored by Cowboy. The limit
+  is not configurable.
+
+* The final chunk was mistakenly sent in responses to HEAD
+  requests. This is now corrected.
+
+* `OPTIONS *` requests were broken in Cowboy 2.0. They are now
+  working again. Both the routing and `cowboy_req:uri/1,2` have
+  been corrected.
+
+* 204 responses no longer include a content-length header.
+
+* A packet could be lost when switching to Websocket or any
+  other protocol via the `switch_protocol` command. This is
+  now fixed.
+
+* A 426 response will now be sent when a handler requires
+  the client to upgrade to Websocket and the request did not
+  include the required headers.
+
+* Both experimental stream handlers `cowboy_metrics_h` and
+  `cowboy_tracer_h` received a number of fixes and improvements.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.1/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.1/index.html
new file mode 100644
index 00000000..45aa984c
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.1/index.html
@@ -0,0 +1,243 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.1 to 2.2</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.1 to 2.2</span></h1>
+
+<p>Cowboy 2.2 focused on adding features required for writing gRPC servers and on completing test suites for the core HTTP RFCs, fixing many bugs along the way.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Add support for sending trailers at the end of response bodies. Trailers are additional header fields that may be sent after the body to add more information to the response. Their usage is required in gRPC servers. They are optional and may be discarded in other scenarios (for example if the request goes through an HTTP/1.0 proxy, as HTTP/1.0 does not support trailers).
+</li>
+<li>The <code>max_skip_body_length</code> option was added to <code>cowboy_http</code>. It controls how much of a request body Cowboy is willing to skip when the handler did not touch it. If the remaining body size is too large Cowboy instead closes the connection. It defaults to 1MB.
+</li>
+<li>The CONNECT and TRACE methods are now rejected as they are currently not implemented and must be handled differently than other methods. They will be implemented in a future release.
+</li>
+</ul>
+<h2 id="_new_functions">New functions</h2>
+<ul><li>The function <code>stream_trailers/2</code> has been added. It terminates a stream and adds trailer fields at the end of the response. A corresponding stream handler command <code>{trailers, Trailers}</code> has also been added.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Test suites for the core HTTP RFCs RFC7230, RFC7231 and RFC7540 have been completed. Many of the bugs listed here were fixed as a result of this work.
+</li>
+<li>Many HTTP/2 edge cases when clients are misbehaving have been corrected. This includes many cases where the request is malformed (for example when a pseudo-header is present twice).
+</li>
+<li>When the HTTP/2 SETTINGS_INITIAL_WINDOW_SIZE value changes, Cowboy now properly updates the flow control windows.
+</li>
+<li>HTTP/2 could mistakenly log stray messages that actually were expected. This is no longer the case.
+</li>
+<li>We no longer send a GOAWAY frame when the HTTP/2 preface is invalid.
+</li>
+<li>Some values in the Req object of pushed requests were in the wrong type. They are now the expected binary instead of iolist.
+</li>
+<li>A response body was sometimes sent in response to HEAD requests when using HTTP/2. The body is now ignored.
+</li>
+<li>The <code>max_headers</code> option for <code>cowboy_http</code> was not always respected depending on the contents of the buffer. The limit is now strict.
+</li>
+<li>When an early error occurred on the HTTP/1.1 request line, the partial Req given to stream handlers was missing the <code>ref</code> and <code>peer</code> information. This has been corrected.
+</li>
+<li>Absolute URIs with a userinfo component, or without an authority component, are now properly rejected for HTTP/1.0 and HTTP/1.1.
+</li>
+<li>Whitespace is no longer allowed in header lines before the colon.
+</li>
+<li>408 responses to HTTP/1.1 requests now properly include a connection: close header indicating that we are going to close the connection. This header will also be sent for other early errors resulting in the closing of the connection.
+</li>
+<li>When both the transfer-encoding and content-length headers are sent in an HTTP/1.1 request, the transfer-encoding now takes precedence over the content-length header and the latter is removed from the Req object.
+</li>
+<li>A 400 response is now returned when the transfer-encoding header is invalid or contains any transfer-coding other than chunked.
+</li>
+<li>Invalid chunk sizes are now rejected immediately.
+</li>
+<li>Chunk extensions are now limited to 129 characters. They are not used in practice and are still ignored by Cowboy. The limit is not configurable.
+</li>
+<li>The final chunk was mistakenly sent in responses to HEAD requests. This is now corrected.
+</li>
+<li><code>OPTIONS *</code> requests were broken in Cowboy 2.0. They are now working again. Both the routing and <code>cowboy_req:uri/1,2</code> have been corrected.
+</li>
+<li>204 responses no longer include a content-length header.
+</li>
+<li>A packet could be lost when switching to Websocket or any other protocol via the <code>switch_protocol</code> command. This is now fixed.
+</li>
+<li>A 426 response will now be sent when a handler requires the client to upgrade to Websocket and the request did not include the required headers.
+</li>
+<li>Both experimental stream handlers <code>cowboy_metrics_h</code> and <code>cowboy_tracer_h</code> received a number of fixes and improvements.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.2/">
+					Migrating from Cowboy 2.2 to 2.3
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.0/">
+					Migrating from Cowboy 2.0 to 2.1
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.10.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.10.asciidoc
new file mode 100644
index 00000000..aaa8fe9d
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.10.asciidoc
@@ -0,0 +1,139 @@
+[appendix]
+== Migrating from Cowboy 2.10 to 2.11
+
+Cowboy 2.11 contains a variety of new features and bug
+fixes. Nearly all previously experimental features are
+now marked as stable, including Websocket over HTTP/2.
+Included is a fix for an HTTP/2 protocol CVE.
+
+Cowboy 2.11 requires Erlang/OTP 24.0 or greater.
+
+Cowboy is now using GitHub Actions for CI. The main reason
+for the move is to reduce costs by no longer having to
+self-host CI runners. The downside is that GitHub runners
+are less reliable and timing dependent tests are now more
+likely to fail.
+
+=== Features added
+
+* A new HTTP/2 option `max_cancel_stream_rate` has been added
+  to control the rate of stream cancellation the server will
+  accept. By default Cowboy will accept 500 cancelled streams
+  every 10 seconds.
+
+* A new stream handler `cowboy_decompress_h` has been added.
+  It allows automatically decompressing incoming gzipped
+  request bodies. It includes options to protect against
+  zip bombs.
+
+* Websocket over HTTP/2 is no longer considered experimental.
+  Note that the `enable_connect_protocol` option must be set
+  to `true` in order to use Websocket over HTTP/2 for the
+  time being.
+
+* Automatic mode for reading request bodies has been
+  documented. In automatic mode, Cowboy waits indefinitely
+  for data and sends a `request_body` message when data
+  comes in. It mirrors `{active, once}` socket modes.
+  This is ideal for loop handlers and is also used
+  internally for HTTP/2 Websocket.
+
+* Ranged requests support is no longer considered
+  experimental. It was added in 2.6 to both `cowboy_static`
+  and `cowboy_rest`. Ranged responses can be produced
+  either automatically (for the `bytes` unit) or manually.
+  REST flowcharts have been updated with the new callbacks
+  and steps related to handling ranged requests.
+
+* A new HTTP/1.1 and HTTP/2 option `reset_idle_timeout_on_send`
+  has been added. When enabled, the `idle_timeout` will be
+  reset every time Cowboy sends data to the socket.
+
+* Loop handlers may now return a timeout value in the place
+  of `hibernate`. Timeouts behave the same as in `gen_server`.
+
+* The `generate_etag` callback of REST handlers now accepts
+  `undefined` as a return value to allow conditionally
+  generating etags.
+
+* The `cowboy_compress_h` options `compress_threshold` and
+  `compress_buffering` are no longer considered experimental.
+  They were de facto stable since 2.6 as they already were
+  documented.
+
+* Functions `cowboy:get_env/2,3` have been added.
+
+* Better error messages have been added when trying to send
+  a 204 or 304 response with a body; when attempting to
+  send two responses to a single request; when trying to
+  push a response after the final response; when trying
+  to send a `set-cookie` header without using
+  `cowboy_req:set_resp_cookie/3,4`.
+
+=== Features removed
+
+* Cowboy will no longer include the NPN extension when
+  starting a TLS listener. This extension has long been
+  deprecated and replaced with the ALPN extension. Cowboy
+  will continue using the ALPN extension for protocol
+  negotiation.
+
+=== Bugs fixed
+
+* A fix was made to address the HTTP/2 CVE CVE-2023-44487
+  via the new HTTP/2 option `max_cancel_stream_rate`.
+
+* HTTP/1.1 requests that contain both a content-length and
+  a transfer-encoding header will now be rejected to avoid
+  security risks. Previous behavior was to ignore the
+  content-length header as recommended by the HTTP RFC.
+
+* HTTP/1.1 connections would sometimes use the wrong timeout
+  value to determine whether the connection should be closed.
+  This resulted in connections staying up longer than
+  intended. This should no longer be the case.
+
+* Cowboy now reacts to socket errors immediately for HTTP/1.1
+  and HTTP/2 when possible. Cowboy will notice when connections
+  have been closed properly earlier than before. This also
+  means that the socket option `send_timeout_close` will work
+  as expected.
+
+* Shutting down HTTP/1.1 pipelined requests could lead to
+  the current request being terminated before the response
+  has been sent. This has been addressed.
+
+* When using HTTP/1.1 an invalid Connection header will now
+  be rejected with a 400 status code instead of crashing.
+
+* The documentation now recommends increasing the HTTP/2
+  option `max_frame_size_received`. Cowboy currently uses
+  the protocol default but will increase its default in a
+  future release. Until then users are recommended to set
+  the option to ensure larger requests are accepted and
+  processed with acceptable performance.
+
+* Cowboy could sometimes send HTTP/2 WINDOW_UPDATE frames
+  twice in a row. Now they should be consolidated.
+
+* Cowboy would sometimes send HTTP/2 WINDOW_UPDATE frames
+  for streams that have stopped internally. This should
+  no longer be the case.
+
+* The `cowboy_compress_h` stream handler will no longer
+  attempt to compress responses that have an `etag` header
+  to avoid caching issues.
+
+* The `cowboy_compress_h` will now always add `accept-encoding`
+  to the `vary` header as it indicates that responses may
+  be compressed.
+
+* Cowboy will now remove the `trap_exit` process flag when
+  HTTP/1.1 connections upgrade to Websocket.
+
+* Exit gracefully instead of crashing when the socket gets
+  closed when reading the PROXY header.
+
+* Missing `cowboy_stream` manual pages have been added.
+
+* A number of fixes were made to documentation and examples.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.10/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.10/index.html
new file mode 100644
index 00000000..cff7bb11
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.10/index.html
@@ -0,0 +1,247 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.10 to 2.11</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.10 to 2.11</span></h1>
+
+<p>Cowboy 2.11 contains a variety of new features and bug fixes. Nearly all previously experimental features are now marked as stable, including Websocket over HTTP/2. Included is a fix for an HTTP/2 protocol CVE.</p>
+<p>Cowboy 2.11 requires Erlang/OTP 24.0 or greater.</p>
+<p>Cowboy is now using GitHub Actions for CI. The main reason for the move is to reduce costs by no longer having to self-host CI runners. The downside is that GitHub runners are less reliable and timing dependent tests are now more likely to fail.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>A new HTTP/2 option <code>max_cancel_stream_rate</code> has been added to control the rate of stream cancellation the server will accept. By default Cowboy will accept 500 cancelled streams every 10 seconds.
+</li>
+<li>A new stream handler <code>cowboy_decompress_h</code> has been added. It allows automatically decompressing incoming gzipped request bodies. It includes options to protect against zip bombs.
+</li>
+<li>Websocket over HTTP/2 is no longer considered experimental. Note that the <code>enable_connect_protocol</code> option must be set to <code>true</code> in order to use Websocket over HTTP/2 for the time being.
+</li>
+<li>Automatic mode for reading request bodies has been documented. In automatic mode, Cowboy waits indefinitely for data and sends a <code>request_body</code> message when data comes in. It mirrors <code>{active, once}</code> socket modes. This is ideal for loop handlers and is also used internally for HTTP/2 Websocket.
+</li>
+<li>Ranged requests support is no longer considered experimental. It was added in 2.6 to both <code>cowboy_static</code> and <code>cowboy_rest</code>. Ranged responses can be produced either automatically (for the <code>bytes</code> unit) or manually. REST flowcharts have been updated with the new callbacks and steps related to handling ranged requests.
+</li>
+<li>A new HTTP/1.1 and HTTP/2 option <code>reset_idle_timeout_on_send</code> has been added. When enabled, the <code>idle_timeout</code> will be reset every time Cowboy sends data to the socket.
+</li>
+<li>Loop handlers may now return a timeout value in the place of <code>hibernate</code>. Timeouts behave the same as in <code>gen_server</code>.
+</li>
+<li>The <code>generate_etag</code> callback of REST handlers now accepts <code>undefined</code> as a return value to allow conditionally generating etags.
+</li>
+<li>The <code>cowboy_compress_h</code> options <code>compress_threshold</code> and <code>compress_buffering</code> are no longer considered experimental. They were de facto stable since 2.6 as they already were documented.
+</li>
+<li>Functions <code>cowboy:get_env/2,3</code> have been added.
+</li>
+<li>Better error messages have been added when trying to send a 204 or 304 response with a body; when attempting to send two responses to a single request; when trying to push a response after the final response; when trying to send a <code>set-cookie</code> header without using <code>cowboy_req:set_resp_cookie/3,4</code>.
+</li>
+</ul>
+<h2 id="_features_removed">Features removed</h2>
+<ul><li>Cowboy will no longer include the NPN extension when starting a TLS listener. This extension has long been deprecated and replaced with the ALPN extension. Cowboy will continue using the ALPN extension for protocol negotiation.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>A fix was made to address the HTTP/2 CVE CVE-2023-44487 via the new HTTP/2 option <code>max_cancel_stream_rate</code>.
+</li>
+<li>HTTP/1.1 requests that contain both a content-length and a transfer-encoding header will now be rejected to avoid security risks. Previous behavior was to ignore the content-length header as recommended by the HTTP RFC.
+</li>
+<li>HTTP/1.1 connections would sometimes use the wrong timeout value to determine whether the connection should be closed. This resulted in connections staying up longer than intended. This should no longer be the case.
+</li>
+<li>Cowboy now reacts to socket errors immediately for HTTP/1.1 and HTTP/2 when possible. Cowboy will notice when connections have been closed properly earlier than before. This also means that the socket option <code>send_timeout_close</code> will work as expected.
+</li>
+<li>Shutting down HTTP/1.1 pipelined requests could lead to the current request being terminated before the response has been sent. This has been addressed.
+</li>
+<li>When using HTTP/1.1 an invalid Connection header will now be rejected with a 400 status code instead of crashing.
+</li>
+<li>The documentation now recommends increasing the HTTP/2 option <code>max_frame_size_received</code>. Cowboy currently uses the protocol default but will increase its default in a future release. Until then users are recommended to set the option to ensure larger requests are accepted and processed with acceptable performance.
+</li>
+<li>Cowboy could sometimes send HTTP/2 WINDOW_UPDATE frames twice in a row. Now they should be consolidated.
+</li>
+<li>Cowboy would sometimes send HTTP/2 WINDOW_UPDATE frames for streams that have stopped internally. This should no longer be the case.
+</li>
+<li>The <code>cowboy_compress_h</code> stream handler will no longer attempt to compress responses that have an <code>etag</code> header to avoid caching issues.
+</li>
+<li>The <code>cowboy_compress_h</code> will now always add <code>accept-encoding</code> to the <code>vary</code> header as it indicates that responses may be compressed.
+</li>
+<li>Cowboy will now remove the <code>trap_exit</code> process flag when HTTP/1.1 connections upgrade to Websocket.
+</li>
+<li>Exit gracefully instead of crashing when the socket gets closed when reading the PROXY header.
+</li>
+<li>Missing <code>cowboy_stream</code> manual pages have been added.
+</li>
+<li>A number of fixes were made to documentation and examples.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.11/">
+					Migrating from Cowboy 2.11 to 2.12
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.9/">
+					Migrating from Cowboy 2.9 to 2.10
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
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+
+      <footer>
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+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.11.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.11.asciidoc
new file mode 100644
index 00000000..ab746426
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.11.asciidoc
@@ -0,0 +1,15 @@
+[appendix]
+== Migrating from Cowboy 2.11 to 2.12
+
+Cowboy 2.12 contains a small security improvement for
+the HTTP/2 protocol.
+
+Cowboy 2.12 requires Erlang/OTP 24.0 or greater.
+
+=== Features added
+
+* A new HTTP/2 option `max_fragmented_header_block_size` has
+  been added to limit the size of header blocks that are
+  sent over multiple HEADERS and CONTINUATION frames.
+
+* Update Cowlib to 2.13.0.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.11/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.11/index.html
new file mode 100644
index 00000000..857f0331
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.11/index.html
@@ -0,0 +1,192 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.11 to 2.12</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.11 to 2.12</span></h1>
+
+<p>Cowboy 2.12 contains a small security improvement for the HTTP/2 protocol.</p>
+<p>Cowboy 2.12 requires Erlang/OTP 24.0 or greater.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>A new HTTP/2 option <code>max_fragmented_header_block_size</code> has been added to limit the size of header blocks that are sent over multiple HEADERS and CONTINUATION frames.
+</li>
+<li>Update Cowlib to 2.13.0.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/">
+					Migrating from Cowboy 2.12 to 2.13
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.10/">
+					Migrating from Cowboy 2.10 to 2.11
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.12.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.12.asciidoc
new file mode 100644
index 00000000..d058db33
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.12.asciidoc
@@ -0,0 +1,115 @@
+[appendix]
+== Migrating from Cowboy 2.12 to 2.13
+
+Cowboy 2.13 focuses on improving the performance of
+Websocket, as well as the HTTP protocols. It also
+contains a variety of new features and bug fixes.
+In addition, Cowboy 2.13 is the first Cowboy version
+that contains the experimental HTTP/3 support.
+
+Cowboy 2.13 requires Erlang/OTP 24.0 or greater.
+
+=== Features added
+
+* The option `dynamic_buffer` has been added. When
+  enabled, Cowboy will dynamically change the
+  `buffer` socket option based on how much data
+  it receives. It will start at 1024 bytes and
+  go up to 131072 bytes by default. This applies
+  to HTTP/1.1, HTTP/2 and Websocket. The performance
+  gains are very important depending on the scenario.
+
+* HTTP/1.1 and HTTP/2 now accept the `hibernate`
+  option. When set the connection process will
+  automatically hibernate to reduce memory usage
+  at a small performance cost.
+
+* The `protocols` and `alpn_default_protocol` protocol
+  options have been added to control exactly which
+  HTTP protocols are allowed over clear and TLS listeners.
+
+* The Websocket `max_frame_size` option can now be
+  set dynamically via the `set_options` command.
+  This allows configuring a smaller max size and
+  increase it after authentication or other checks.
+
+* `cowboy_req:set_resp_headers` now accept lists of
+  headers. This can be used to simplify passing
+  headers coming from client applications such as
+  Gun. Note that the set-cookie header cannot be
+  provided using this function.
+
+* `cowboy_rest` now always sets the allow header.
+
+* Update Ranch to 1.8.1.
+
+* Update Cowlib to 2.14.0.
+
+* When using Hex.pm, version check requirements will
+  now be relaxed. Cowboy will accept any Ranch version
+  from 1.8.0 to 2.2.0 as well as future 2.x versions.
+  Similarly, any Cowlib 2.x version from 2.14.0 will
+  be accepted.
+
+=== Experimental features added
+
+* Experimental support for HTTP/3 has been added,
+  including Websocket over HTTP/3. HTTP/3 support
+  is disabled by default; to enable, the environment
+  variable COWBOY_QUICER must be set at compile-time.
+
+=== Features deprecated
+
+* The `inactivity_timeout` option is now deprecated
+  for all protocols. It is de facto ignored when
+  `hibernate` is enabled.
+
+=== Optimisation-related changes
+
+* The behavior of the `idle_timeout` timer has been
+  changed for HTTP/2 and Websocket. Cowboy used to
+  reset the timer on every data packet received from
+  the socket. Now Cowboy will check periodically
+  whether new data was received in the interval.
+
+* URI and query string hex encoding and decoding has
+  been optimised.
+
+* Websocket UTF-8 validation of text frames has been
+  optimised.
+
+* Websocket unmasking has been optimised.
+
+=== Bugs fixed
+
+* HTTP/1.1 upgrade to HTTP/2 is now disabled over TLS,
+  as HTTP/2 over TLS must be negotiated via ALPN.
+
+* `cowboy_req:filter_cookies` could miss valid cookies.
+  It has been corrected.
+
+* HTTP/1.1 could get to a state where it would stop
+  receiving data from the socket, or buffer the data
+  without processing it, and the connection eventually
+  time out. This has been fixed.
+
+* Websocket did not compress zero-length frames properly.
+  This resulted in decompression errors in the client.
+  This has been corrected.
+
+* Websocket compression will now be disabled when only
+  the server sets `client_max_window_bits`, as otherwise
+  decompression errors will occur.
+
+* Websocket will now apply `max_frame_size` both to
+  compressed frames as well as the uncompressed payload.
+  Cowboy will stop decompressing when the limit is
+  reached.
+
+* Cowboy now properly handles exits of request processes
+  that occurred externally (e.g. via `exit/2`).
+
+* Invalid return values from `content_types_provided`
+  could result in an atom sent to the socket, leading
+  to a cryptic error message. The invalid value will
+  now result in a better error message.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.12/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.12/index.html
new file mode 100644
index 00000000..ea9d9ed0
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.12/index.html
@@ -0,0 +1,242 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.12 to 2.13</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.12 to 2.13</span></h1>
+
+<p>Cowboy 2.13 focuses on improving the performance of Websocket, as well as the HTTP protocols. It also contains a variety of new features and bug fixes. In addition, Cowboy 2.13 is the first Cowboy version that contains the experimental HTTP/3 support.</p>
+<p>Cowboy 2.13 requires Erlang/OTP 24.0 or greater.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>The option <code>dynamic_buffer</code> has been added. When enabled, Cowboy will dynamically change the <code>buffer</code> socket option based on how much data it receives. It will start at 1024 bytes and go up to 131072 bytes by default. This applies to HTTP/1.1, HTTP/2 and Websocket. The performance gains are very important depending on the scenario.
+</li>
+<li>HTTP/1.1 and HTTP/2 now accept the <code>hibernate</code> option. When set the connection process will automatically hibernate to reduce memory usage at a small performance cost.
+</li>
+<li>The <code>protocols</code> and <code>alpn_default_protocol</code> protocol options have been added to control exactly which HTTP protocols are allowed over clear and TLS listeners.
+</li>
+<li>The Websocket <code>max_frame_size</code> option can now be set dynamically via the <code>set_options</code> command. This allows configuring a smaller max size and increase it after authentication or other checks.
+</li>
+<li><code>cowboy_req:set_resp_headers</code> now accept lists of headers. This can be used to simplify passing headers coming from client applications such as Gun. Note that the set-cookie header cannot be provided using this function.
+</li>
+<li><code>cowboy_rest</code> now always sets the allow header.
+</li>
+<li>Update Ranch to 1.8.1.
+</li>
+<li>Update Cowlib to 2.14.0.
+</li>
+<li>When using Hex.pm, version check requirements will now be relaxed. Cowboy will accept any Ranch version from 1.8.0 to 2.2.0 as well as future 2.x versions. Similarly, any Cowlib 2.x version from 2.14.0 will be accepted.
+</li>
+</ul>
+<h2 id="_experimental_features_added">Experimental features added</h2>
+<ul><li>Experimental support for HTTP/3 has been added, including Websocket over HTTP/3. HTTP/3 support is disabled by default; to enable, the environment variable COWBOY_QUICER must be set at compile-time.
+</li>
+</ul>
+<h2 id="_features_deprecated">Features deprecated</h2>
+<ul><li>The <code>inactivity_timeout</code> option is now deprecated for all protocols. It is de facto ignored when <code>hibernate</code> is enabled.
+</li>
+</ul>
+<h2 id="_optimisation_related_changes">Optimisation-related changes</h2>
+<ul><li>The behavior of the <code>idle_timeout</code> timer has been changed for HTTP/2 and Websocket. Cowboy used to reset the timer on every data packet received from the socket. Now Cowboy will check periodically whether new data was received in the interval.
+</li>
+<li>URI and query string hex encoding and decoding has been optimised.
+</li>
+<li>Websocket UTF-8 validation of text frames has been optimised.
+</li>
+<li>Websocket unmasking has been optimised.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>HTTP/1.1 upgrade to HTTP/2 is now disabled over TLS, as HTTP/2 over TLS must be negotiated via ALPN.
+</li>
+<li><code>cowboy_req:filter_cookies</code> could miss valid cookies. It has been corrected.
+</li>
+<li>HTTP/1.1 could get to a state where it would stop receiving data from the socket, or buffer the data without processing it, and the connection eventually time out. This has been fixed.
+</li>
+<li>Websocket did not compress zero-length frames properly. This resulted in decompression errors in the client. This has been corrected.
+</li>
+<li>Websocket compression will now be disabled when only the server sets <code>client_max_window_bits</code>, as otherwise decompression errors will occur.
+</li>
+<li>Websocket will now apply <code>max_frame_size</code> both to compressed frames as well as the uncompressed payload. Cowboy will stop decompressing when the limit is reached.
+</li>
+<li>Cowboy now properly handles exits of request processes that occurred externally (e.g. via <code>exit/2</code>).
+</li>
+<li>Invalid return values from <code>content_types_provided</code> could result in an atom sent to the socket, leading to a cryptic error message. The invalid value will now result in a better error message.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/performance/">
+					Performance
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.11/">
+					Migrating from Cowboy 2.11 to 2.12
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.2.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.2.asciidoc
new file mode 100644
index 00000000..dacf790e
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.2.asciidoc
@@ -0,0 +1,56 @@
+[appendix]
+== Migrating from Cowboy 2.2 to 2.3
+
+Cowboy 2.3 focused on making the Cowboy processes behave
+properly according to OTP principles. This version is a
+very good milestone toward that goal and most of everything
+should now work. Release upgrades and a few details will
+be improved in future versions.
+
+=== Features added
+
+* Add support for all functions from the module `sys`. Note
+  that Cowboy currently does not implement the `sys` debugging
+  mechanisms as tracing is recommended instead.
+
+* Add a `max_frame_size` option for Websocket handlers
+  to close the connection when the client attempts to
+  send a frame that's too large. It currently defaults
+  to `infinity` to avoid breaking existing code but will
+  be changed in a future version.
+
+* Update Cowlib to 2.2.1.
+
+* Add support for the 308 status code and a test suite
+  for RFC7538 where it is defined.
+
+=== Bugs fixed
+
+* Ensure timeout options accept the value `infinity` as
+  documented.
+
+* Properly reject HTTP/2 requests with an invalid content-length
+  header instead of simply crashing.
+
+* When switching from HTTP/1.1 to Websocket or user protocols
+  all the messages in the mailbox were flushed. Only messages
+  specific to `cowboy_http` should now be flushed.
+
+* Parsing of the x-forwarded-for header has been corrected.
+  It now supports IPv6 addresses both with and without port.
+
+* Websocket subprotocol tokens are now parsed in a case
+  insensitive manner, according to the spec.
+
+* Cookies without values are now allowed. For example `Cookie: foo`.
+
+* Colons are now allowed within path segments in routes provided
+  to `cowboy_router:compile/1` as long as they are not the first
+  character of the path segment.
+
+* The `cowboy_req:delete_resp_header/2` function will no longer
+  crash when no response header was set before calling it.
+
+* A miscount of the output HTTP/2 flow control window has been
+  fixed. It prevented sending the response body fully to some
+  clients. The issue only affected response bodies sent as iolists.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.2/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.2/index.html
new file mode 100644
index 00000000..4e3b3b59
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.2/index.html
@@ -0,0 +1,215 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.2 to 2.3</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.2 to 2.3</span></h1>
+
+<p>Cowboy 2.3 focused on making the Cowboy processes behave properly according to OTP principles. This version is a very good milestone toward that goal and most of everything should now work. Release upgrades and a few details will be improved in future versions.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Add support for all functions from the module <code>sys</code>. Note that Cowboy currently does not implement the <code>sys</code> debugging mechanisms as tracing is recommended instead.
+</li>
+<li>Add a <code>max_frame_size</code> option for Websocket handlers to close the connection when the client attempts to send a frame that&apos;s too large. It currently defaults to <code>infinity</code> to avoid breaking existing code but will be changed in a future version.
+</li>
+<li>Update Cowlib to 2.2.1.
+</li>
+<li>Add support for the 308 status code and a test suite for RFC7538 where it is defined.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Ensure timeout options accept the value <code>infinity</code> as documented.
+</li>
+<li>Properly reject HTTP/2 requests with an invalid content-length header instead of simply crashing.
+</li>
+<li>When switching from HTTP/1.1 to Websocket or user protocols all the messages in the mailbox were flushed. Only messages specific to <code>cowboy_http</code> should now be flushed.
+</li>
+<li>Parsing of the x-forwarded-for header has been corrected. It now supports IPv6 addresses both with and without port.
+</li>
+<li>Websocket subprotocol tokens are now parsed in a case insensitive manner, according to the spec.
+</li>
+<li>Cookies without values are now allowed. For example <code>Cookie: foo</code>.
+</li>
+<li>Colons are now allowed within path segments in routes provided to <code>cowboy_router:compile/1</code> as long as they are not the first character of the path segment.
+</li>
+<li>The <code>cowboy_req:delete_resp_header/2</code> function will no longer crash when no response header was set before calling it.
+</li>
+<li>A miscount of the output HTTP/2 flow control window has been fixed. It prevented sending the response body fully to some clients. The issue only affected response bodies sent as iolists.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.3/">
+					Migrating from Cowboy 2.3 to 2.4
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.1/">
+					Migrating from Cowboy 2.1 to 2.2
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.3.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.3.asciidoc
new file mode 100644
index 00000000..6a604f97
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.3.asciidoc
@@ -0,0 +1,66 @@
+[appendix]
+== Migrating from Cowboy 2.3 to 2.4
+
+Cowboy 2.4 focused on improving the HTTP/2 implementation.
+All existing tests from RFC7540 and the h2spec test suite
+now all pass. Numerous options have been added to control
+SETTINGS and related behavior. In addition experimental
+support for Websocket over HTTP/2 was added.
+
+=== Features added
+
+* Add experimental support for Websocket over HTTP/2.
+  You can use the `enable_connect_protocol` option to
+  enable. It implements the following draft:
+  https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01
+
+* Add options `max_decode_table_size` and
+  `max_encode_table_size` to restrict the size of the
+  HPACK compression dictionary.
+
+* Add option `max_concurrent_streams` to restrict the
+  number of HTTP/2 streams that can be opened concurrently.
+
+* Add options `initial_connection_window_size` and
+  `initial_stream_window_size` to restrict the size of
+  the HTTP/2 request body buffers for the whole connection
+  and per stream, respectively.
+
+* Add options `max_frame_size_received` and
+  `max_frame_size_sent` to restrict the size of
+  HTTP/2 frames.
+
+* Add option `settings_timeout` to reject clients that
+  did not send a SETTINGS ack. Note that this currently
+  may only occur at the beginning of the connection.
+
+* Update Ranch to 1.5.0
+
+* Update Cowlib to 2.3.0
+
+=== Bugs fixed
+
+* Fix the END_STREAM flag for informational responses
+  when using HTTP/2.
+
+* Receive and ignore HTTP/2 request trailers if any
+  for HTTP/2 requests. Request trailer information will
+  be propagated to the user code in a future release.
+
+* Reject WINDOW_UPDATE frames that are sent after the
+  client sent an RST_STREAM. Note that Cowboy will not
+  keep state information about terminated streams
+  forever and so the behavior might differ depending
+  on when the stream was reset.
+
+* Reject streams that depend on themselves. Note that
+  Cowboy currently does not implement HTTP/2's priority
+  mechanisms so this issue was harmless.
+
+* Reject HTTP/2 requests where the body size is different
+  than the content-length value. Note that due to how Cowboy
+  works some requests might go through regardless, for
+  example when the user code does not read the request body.
+
+* Fix all existing test failures from RFC7540. This was
+  mostly incorrect test cases or intermittent failures.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.3/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.3/index.html
new file mode 100644
index 00000000..fd364c1c
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.3/index.html
@@ -0,0 +1,217 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.3 to 2.4</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.3 to 2.4</span></h1>
+
+<p>Cowboy 2.4 focused on improving the HTTP/2 implementation. All existing tests from RFC7540 and the h2spec test suite now all pass. Numerous options have been added to control SETTINGS and related behavior. In addition experimental support for Websocket over HTTP/2 was added.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Add experimental support for Websocket over HTTP/2. You can use the <code>enable_connect_protocol</code> option to enable. It implements the following draft: <a href="https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01">https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01</a>
+</li>
+<li>Add options <code>max_decode_table_size</code> and <code>max_encode_table_size</code> to restrict the size of the HPACK compression dictionary.
+</li>
+<li>Add option <code>max_concurrent_streams</code> to restrict the number of HTTP/2 streams that can be opened concurrently.
+</li>
+<li>Add options <code>initial_connection_window_size</code> and <code>initial_stream_window_size</code> to restrict the size of the HTTP/2 request body buffers for the whole connection and per stream, respectively.
+</li>
+<li>Add options <code>max_frame_size_received</code> and <code>max_frame_size_sent</code> to restrict the size of HTTP/2 frames.
+</li>
+<li>Add option <code>settings_timeout</code> to reject clients that did not send a SETTINGS ack. Note that this currently may only occur at the beginning of the connection.
+</li>
+<li>Update Ranch to 1.5.0
+</li>
+<li>Update Cowlib to 2.3.0
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Fix the END_STREAM flag for informational responses when using HTTP/2.
+</li>
+<li>Receive and ignore HTTP/2 request trailers if any for HTTP/2 requests. Request trailer information will be propagated to the user code in a future release.
+</li>
+<li>Reject WINDOW_UPDATE frames that are sent after the client sent an RST_STREAM. Note that Cowboy will not keep state information about terminated streams forever and so the behavior might differ depending on when the stream was reset.
+</li>
+<li>Reject streams that depend on themselves. Note that Cowboy currently does not implement HTTP/2&apos;s priority mechanisms so this issue was harmless.
+</li>
+<li>Reject HTTP/2 requests where the body size is different than the content-length value. Note that due to how Cowboy works some requests might go through regardless, for example when the user code does not read the request body.
+</li>
+<li>Fix all existing test failures from RFC7540. This was mostly incorrect test cases or intermittent failures.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.4/">
+					Migrating from Cowboy 2.4 to 2.5
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.2/">
+					Migrating from Cowboy 2.2 to 2.3
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.4.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.4.asciidoc
new file mode 100644
index 00000000..3cdeaa54
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.4.asciidoc
@@ -0,0 +1,109 @@
+[appendix]
+== Migrating from Cowboy 2.4 to 2.5
+
+Cowboy 2.5 focused on making the test suites pass. A
+variety of new features, fixes and improvements have
+also been worked on.
+
+=== Features added
+
+* Add option `linger_timeout` to control how long
+  Cowboy will wait before closing the socket when
+  shutting down the connection. This helps avoid
+  the TCP reset problem HTTP/1.1 suffers from. The
+  default is now 1000 ms.
+
+* It is now possible to stream a response body
+  without using chunked transfer-encoding when the
+  protocol is HTTP/1.1. To enable this behavior,
+  simply pass the content-length header with the
+  expected size when initiating the streamed response.
+
+* Update Ranch to 1.6.2
+
+* Update Cowlib to 2.6.0
+
+=== Experimental features added
+
+* Websocket handlers now feature a commands-based interface.
+  The return value from the callbacks can now take the form
+  `{Commands, State}` where `Commands` can be frames to be
+  sent or commands yet to be introduced. New commands will
+  be available only through this new interface.
+
+* Add the `{active, boolean()}` Websocket handler command.
+  It allows disabling reading from the socket when `false`
+  is returned. `true` reenables reading from the socket.
+
+* Add the protocol option `logger` that allows configuring
+  which logger module will be used. The logger module must
+  follow the interface of the new `logger` module in Erlang/OTP 21,
+  or be set to `error_logger` to keep the old behavior. A
+  similar transport option exists in Ranch 1.6; both options
+  are necessary to override Cowboy's default behavior completely.
+
+* Add the `{log, Level, Format, Args}` stream handler command.
+  Making it a command rather than a direct call will simplify
+  silencing particular log messages.
+
+=== New functions
+
+* The function `cowboy_req:stream_events/3` streams one or more
+  text/event-stream events, encoding them automatically.
+
+* The functions `cowboy_req:read_and_match_urlencoded_body/2,3`
+  can be used to read, parse and match application/x-www-form-urlencoded
+  request bodies, in a similar way to `cowboy_req:match_qs/2`.
+
+=== Bugs fixed
+
+* Fix Erlang/OTP 21 warnings.
+
+* Ensure that the port number is always defined in the
+  Req object. When it is not provided in the request,
+  the default port number for the protocol being used
+  will be set.
+
+* Ensure stream handlers can run after `cowboy_stream_h`.
+
+* Honor the SETTINGS_ENABLE_PUSH HTTP/2 setting: don't
+  send PUSH frames to clients that disabled it.
+
+* Fix HTTP/2 `settings_timeout` option when the value
+  is set to `infinity`.
+
+* HTTP/1.1 responses will no longer include a trailer header
+  when the request had no te header.
+
+* HTTP/1.1 204 responses no longer send the transfer-encoding
+  header when `cowboy_req:stream_reply/2,3` is used to send
+  a response.
+
+* Improve HTTP/1.1 keepalive handling to avoid processing
+  requests that follow the final request that will receive
+  a response.
+
+* Improve the validation of HTTP/1.1 absolute-form requests.
+
+* When the `switch_protocol` is used after a response was
+  sent, Cowboy will no longer attempt to send the 101 informational
+  response for the protocol upgrade. This caused a crash of the
+  connection previously.
+
+* Errors that occur when a callback returned by
+  `content_types_provided` does not exist have been improved.
+
+* Prevent annoying error logs when using sendfile in
+  Erlang/OTP 20 and lower.
+
+* Add missing frame types to `websocket_handle`.
+
+* A test suite has been added for RFC8297 to ensure that
+  103 informational responses can be sent.
+
+* Numerous test cases have been fixed, improved or removed in order
+  to make the test suites pass. Most of the failures were caused
+  by broken tests.
+
+* Some misguiding or incorrect statements in the documentation
+  have been removed or clarified.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.4/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.4/index.html
new file mode 100644
index 00000000..f8b47b8c
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.4/index.html
@@ -0,0 +1,245 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.4 to 2.5</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.4 to 2.5</span></h1>
+
+<p>Cowboy 2.5 focused on making the test suites pass. A variety of new features, fixes and improvements have also been worked on.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Add option <code>linger_timeout</code> to control how long Cowboy will wait before closing the socket when shutting down the connection. This helps avoid the TCP reset problem HTTP/1.1 suffers from. The default is now 1000 ms.
+</li>
+<li>It is now possible to stream a response body without using chunked transfer-encoding when the protocol is HTTP/1.1. To enable this behavior, simply pass the content-length header with the expected size when initiating the streamed response.
+</li>
+<li>Update Ranch to 1.6.2
+</li>
+<li>Update Cowlib to 2.6.0
+</li>
+</ul>
+<h2 id="_experimental_features_added">Experimental features added</h2>
+<ul><li>Websocket handlers now feature a commands-based interface. The return value from the callbacks can now take the form <code>{Commands, State}</code> where <code>Commands</code> can be frames to be sent or commands yet to be introduced. New commands will be available only through this new interface.
+</li>
+<li>Add the <code>{active, boolean()}</code> Websocket handler command. It allows disabling reading from the socket when <code>false</code> is returned. <code>true</code> reenables reading from the socket.
+</li>
+<li>Add the protocol option <code>logger</code> that allows configuring which logger module will be used. The logger module must follow the interface of the new <code>logger</code> module in Erlang/OTP 21, or be set to <code>error_logger</code> to keep the old behavior. A similar transport option exists in Ranch 1.6; both options are necessary to override Cowboy&apos;s default behavior completely.
+</li>
+<li>Add the <code>{log, Level, Format, Args}</code> stream handler command. Making it a command rather than a direct call will simplify silencing particular log messages.
+</li>
+</ul>
+<h2 id="_new_functions">New functions</h2>
+<ul><li>The function <code>cowboy_req:stream_events/3</code> streams one or more text/event-stream events, encoding them automatically.
+</li>
+<li>The functions <code>cowboy_req:read_and_match_urlencoded_body/2,3</code> can be used to read, parse and match application/x-www-form-urlencoded request bodies, in a similar way to <code>cowboy_req:match_qs/2</code>.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Fix Erlang/OTP 21 warnings.
+</li>
+<li>Ensure that the port number is always defined in the Req object. When it is not provided in the request, the default port number for the protocol being used will be set.
+</li>
+<li>Ensure stream handlers can run after <code>cowboy_stream_h</code>.
+</li>
+<li>Honor the SETTINGS_ENABLE_PUSH HTTP/2 setting: don&apos;t send PUSH frames to clients that disabled it.
+</li>
+<li>Fix HTTP/2 <code>settings_timeout</code> option when the value is set to <code>infinity</code>.
+</li>
+<li>HTTP/1.1 responses will no longer include a trailer header when the request had no te header.
+</li>
+<li>HTTP/1.1 204 responses no longer send the transfer-encoding header when <code>cowboy_req:stream_reply/2,3</code> is used to send a response.
+</li>
+<li>Improve HTTP/1.1 keepalive handling to avoid processing requests that follow the final request that will receive a response.
+</li>
+<li>Improve the validation of HTTP/1.1 absolute-form requests.
+</li>
+<li>When the <code>switch_protocol</code> is used after a response was sent, Cowboy will no longer attempt to send the 101 informational response for the protocol upgrade. This caused a crash of the connection previously.
+</li>
+<li>Errors that occur when a callback returned by <code>content_types_provided</code> does not exist have been improved.
+</li>
+<li>Prevent annoying error logs when using sendfile in Erlang/OTP 20 and lower.
+</li>
+<li>Add missing frame types to <code>websocket_handle</code>.
+</li>
+<li>A test suite has been added for RFC8297 to ensure that 103 informational responses can be sent.
+</li>
+<li>Numerous test cases have been fixed, improved or removed in order to make the test suites pass. Most of the failures were caused by broken tests.
+</li>
+<li>Some misguiding or incorrect statements in the documentation have been removed or clarified.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.5/">
+					Migrating from Cowboy 2.5 to 2.6
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.3/">
+					Migrating from Cowboy 2.3 to 2.4
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
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+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
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+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.5.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.5.asciidoc
new file mode 100644
index 00000000..5196cc7e
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.5.asciidoc
@@ -0,0 +1,148 @@
+[appendix]
+== Migrating from Cowboy 2.5 to 2.6
+
+Cowboy 2.6 greatly refactored the HTTP/2 code, a large
+part of which was moved to Cowlib and is now used by
+both the Cowboy server and the Gun client.
+
+A large number of tickets were also closed which
+resulted in many bugs fixed and many features and
+options added, although some of them are still
+experimental.
+
+=== Features added
+
+* Add support for the PROXY protocol header.
+  It can be enabled via the `proxy_header` option.
+  The proxy information can then be found under
+  the `proxy_info` key in the Req object.
+
+* Allow using sendfile tuples in `cowboy_req:stream_body/3`
+  and in the data command in stream handlers. The only
+  caveat is that when using `cowboy_compress_h` the
+  sendfile tuples may have to be converted to in-memory
+  data in order to compress them. This is the case for
+  gzip compression.
+
+* The stream handlers `cowboy_stream_h` and
+  `cowboy_compress_h` are now documented.
+
+* Add the `chunked` option to allow disabling chunked
+  transfer-encoding for HTTP/1.1 connections.
+
+* Add the `http10_keepalive` option to allow disabling
+  keep-alive for HTTP/1.0 connections.
+
+* Add the `idle_timeout` option for HTTP/2.
+
+* Add the `sendfile` option to both HTTP/1.1 and HTTP/2.
+  It allows disabling the sendfile syscall entirely for
+  all connections. It is recommended to disable sendfile
+  when using VirtualBox shared folders.
+
+* Add the `rate_limited/2` callback to REST handlers.
+
+* Add the `deflate_opts` option to Websocket handlers that
+  allows configuring deflate options for the
+  permessage-deflate extension.
+
+* Add the `charset` option to `cowboy_static`.
+
+* Add support for the SameSite cookie attribute.
+
+* Update Ranch to 1.7.0
+
+* Update Cowlib to 2.7.0
+
+=== Experimental features added
+
+* Add support for range requests (RFC7233) in REST handlers.
+  This adds two new callbacks: `ranges_accepted/2` and
+  `range_satisfiable/2` along with the user-specified
+  `ProvideRangeCallback/2`.
+
+* Add automatic handling of range requests to REST handlers
+  that return the callback `auto` from `ranges_accepted/2`.
+  Cowboy will call the configured `ProvideCallback` and
+  then split the output automatically for the ranged response.
+
+* Enable range requests support in `cowboy_static`.
+
+* Add the `{deflate, boolean()}` Websocket handler
+  command to disable permessage-deflate compression
+  temporarily.
+
+* Add the `compress_threshold` option which allows
+  configuring how much data must be present in a
+  response body to compress it. This only applies
+  to non-streamed bodies at this time.
+
+* Add the `compress_buffering` option which allows
+  controlling whether some buffering may be done
+  when streaming a response body. Change the default
+  behavior to not buffer to make sure it works by
+  default in all scenarios.
+
+* Add the `{set_options, map()}` command to stream
+  handlers and Websocket handlers. This can be used
+  to update options on a per-request basis. Allow
+  overriding the `idle_timeout` option for both
+  HTTP/1.1 and Websocket, the `cowboy_compress_h`
+  options for HTTP/1.1 and HTTP/2 and the `chunked`
+  option for HTTP/1.1.
+
+=== Bugs fixed
+
+* Do not send a content-length automatically with
+  304 responses. This status code allows a content-length
+  that corresponds to what would have been sent for a 200
+  response, but is never followed by a body.
+
+* HTTP/2 streams are now terminated once the body
+  has been sent fully, instead of immediately once
+  the stop command is returned (by default when the
+  request process exits). Metrics will therefore
+  more accurately represent when a stream ended.
+
+* Terminate connection processes gracefully when the
+  parent process exists or when sys:terminate/2,3
+  is called.
+
+* Automatically ignore the boundary parameter of multipart
+  media types when using REST handlers. This is a special
+  parameter that may change with all requests and cannot
+  be predicted.
+
+* Fix parsing of the accept header when it contains charset
+  parameters. They are case insensitive and will now be
+  lowercased, like for accept-charset and content-type.
+
+* Handle the charset parameter using `charsets_provided`
+  when it is present in the accept header when using
+  REST handlers.
+
+* Don't select charsets when the q-value is 0 in REST
+  handlers.
+
+* Handle accept-charset headers that include a wildcard
+  in REST handlers.
+
+* Only send a charset header when the content-type
+  negotiated is of type text in REST handlers.
+
+* Remove the default charset iso-8859-1 from REST
+  handlers when no other is provided. This has been
+  removed from the HTTP specifications for a long time.
+
+* Many cases where a content-type header was sent
+  unnecessarily in the REST handlers response have
+  been fixed.
+
+* Handle error_response commands in `cowboy_metrics_h`.
+
+* A number of types and function specifications were
+  fixed or improved. Dialyzer is now run against both
+  the code and tests to help uncover issues.
+
+* An undefined `cowboy_router` behavior has been
+  documented.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.5/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.5/index.html
new file mode 100644
index 00000000..fb59a3bc
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.5/index.html
@@ -0,0 +1,260 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.5 to 2.6</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.5 to 2.6</span></h1>
+
+<p>Cowboy 2.6 greatly refactored the HTTP/2 code, a large part of which was moved to Cowlib and is now used by both the Cowboy server and the Gun client.</p>
+<p>A large number of tickets were also closed which resulted in many bugs fixed and many features and options added, although some of them are still experimental.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Add support for the PROXY protocol header. It can be enabled via the <code>proxy_header</code> option. The proxy information can then be found under the <code>proxy_info</code> key in the Req object.
+</li>
+<li>Allow using sendfile tuples in <code>cowboy_req:stream_body/3</code> and in the data command in stream handlers. The only caveat is that when using <code>cowboy_compress_h</code> the sendfile tuples may have to be converted to in-memory data in order to compress them. This is the case for gzip compression.
+</li>
+<li>The stream handlers <code>cowboy_stream_h</code> and <code>cowboy_compress_h</code> are now documented.
+</li>
+<li>Add the <code>chunked</code> option to allow disabling chunked transfer-encoding for HTTP/1.1 connections.
+</li>
+<li>Add the <code>http10_keepalive</code> option to allow disabling keep-alive for HTTP/1.0 connections.
+</li>
+<li>Add the <code>idle_timeout</code> option for HTTP/2.
+</li>
+<li>Add the <code>sendfile</code> option to both HTTP/1.1 and HTTP/2. It allows disabling the sendfile syscall entirely for all connections. It is recommended to disable sendfile when using VirtualBox shared folders.
+</li>
+<li>Add the <code>rate_limited/2</code> callback to REST handlers.
+</li>
+<li>Add the <code>deflate_opts</code> option to Websocket handlers that allows configuring deflate options for the permessage-deflate extension.
+</li>
+<li>Add the <code>charset</code> option to <code>cowboy_static</code>.
+</li>
+<li>Add support for the SameSite cookie attribute.
+</li>
+<li>Update Ranch to 1.7.0
+</li>
+<li>Update Cowlib to 2.7.0
+</li>
+</ul>
+<h2 id="_experimental_features_added">Experimental features added</h2>
+<ul><li>Add support for range requests (RFC7233) in REST handlers. This adds two new callbacks: <code>ranges_accepted/2</code> and <code>range_satisfiable/2</code> along with the user-specified <code>ProvideRangeCallback/2</code>.
+</li>
+<li>Add automatic handling of range requests to REST handlers that return the callback <code>auto</code> from <code>ranges_accepted/2</code>. Cowboy will call the configured <code>ProvideCallback</code> and then split the output automatically for the ranged response.
+</li>
+<li>Enable range requests support in <code>cowboy_static</code>.
+</li>
+<li>Add the <code>{deflate, boolean()}</code> Websocket handler command to disable permessage-deflate compression temporarily.
+</li>
+<li>Add the <code>compress_threshold</code> option which allows configuring how much data must be present in a response body to compress it. This only applies to non-streamed bodies at this time.
+</li>
+<li>Add the <code>compress_buffering</code> option which allows controlling whether some buffering may be done when streaming a response body. Change the default behavior to not buffer to make sure it works by default in all scenarios.
+</li>
+<li>Add the <code>{set_options, map()}</code> command to stream handlers and Websocket handlers. This can be used to update options on a per-request basis. Allow overriding the <code>idle_timeout</code> option for both HTTP/1.1 and Websocket, the <code>cowboy_compress_h</code> options for HTTP/1.1 and HTTP/2 and the <code>chunked</code> option for HTTP/1.1.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Do not send a content-length automatically with 304 responses. This status code allows a content-length that corresponds to what would have been sent for a 200 response, but is never followed by a body.
+</li>
+<li>HTTP/2 streams are now terminated once the body has been sent fully, instead of immediately once the stop command is returned (by default when the request process exits). Metrics will therefore more accurately represent when a stream ended.
+</li>
+<li>Terminate connection processes gracefully when the parent process exists or when sys:terminate/2,3 is called.
+</li>
+<li>Automatically ignore the boundary parameter of multipart media types when using REST handlers. This is a special parameter that may change with all requests and cannot be predicted.
+</li>
+<li>Fix parsing of the accept header when it contains charset parameters. They are case insensitive and will now be lowercased, like for accept-charset and content-type.
+</li>
+<li>Handle the charset parameter using <code>charsets_provided</code> when it is present in the accept header when using REST handlers.
+</li>
+<li>Don&apos;t select charsets when the q-value is 0 in REST handlers.
+</li>
+<li>Handle accept-charset headers that include a wildcard in REST handlers.
+</li>
+<li>Only send a charset header when the content-type negotiated is of type text in REST handlers.
+</li>
+<li>Remove the default charset iso-8859-1 from REST handlers when no other is provided. This has been removed from the HTTP specifications for a long time.
+</li>
+<li>Many cases where a content-type header was sent unnecessarily in the REST handlers response have been fixed.
+</li>
+<li>Handle error_response commands in <code>cowboy_metrics_h</code>.
+</li>
+<li>A number of types and function specifications were fixed or improved. Dialyzer is now run against both the code and tests to help uncover issues.
+</li>
+<li>An undefined <code>cowboy_router</code> behavior has been documented.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.6/">
+					Migrating from Cowboy 2.6 to 2.7
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.4/">
+					Migrating from Cowboy 2.4 to 2.5
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+
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+
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+
+      <footer>
+        <div class="container">
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+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
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+            <div class="span6 credits">
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diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.6.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.6.asciidoc
new file mode 100644
index 00000000..91d15887
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.6.asciidoc
@@ -0,0 +1,224 @@
+[appendix]
+== Migrating from Cowboy 2.6 to 2.7
+
+Cowboy 2.7 improves the HTTP/2 code with optimizations
+around the sending of DATA and WINDOW_UPDATE frames;
+graceful shutdown of the connection when the client is
+going away; and rate limiting mechanisms. New options
+and mechanisms have also been added to control the
+amount of memory Cowboy ends up using with both HTTP/1.1
+and HTTP/2. Much, but not all, of this work was done
+to address HTTP/2 CVEs about potential denial of service.
+
+In addition, many of the experimental features introduced
+in previous releases have been marked stable and are now
+documented.
+
+Cowboy 2.7 requires Erlang/OTP 20.0 or greater.
+
+=== Features added
+
+* Cowboy is now compatible with both Ranch 1.7 and the
+  upcoming Ranch 2.0.
+
+* The number of HTTP/2 WINDOW_UPDATE frames Cowboy sends
+  has been greatly reduced. Cowboy now applies heuristics
+  to determine whether it is necessary to update the window,
+  based on the current window size and the amount of data
+  requested by streams (the `cowboy_req:read_body/2` length
+  for example). Six new options have been added to control
+  this behavior: `connection_window_margin_size`,
+  `connection_window_update_threshold`,
+  `max_connection_window_size`, `max_stream_window_size`,
+  `stream_window_margin_size` and
+  `stream_window_update_threshold`.
+
+* HTTP/2 connections will now be shut down gracefully
+  when receiving a GOAWAY frame. Cowboy will simply
+  wait for existing streams to finish before closing
+  the connection.
+
+* Functions that stream the response body now have
+  backpressure applied. They now wait for a message
+  to be sent back. The message will be held off when
+  using HTTP/2 and the buffer sizes exceed either
+  `max_connection_buffer_size` or `max_stream_buffer_size`.
+  For HTTP/1.1 the data is sent synchronously and we
+  rely instead on the TCP backpressure.
+
+* A new HTTP/2 option `stream_window_data_threshold`
+  can be used to control how little the DATA frames that
+  Cowboy sends can get. By default Cowboy will wait for
+  the window to be large enough to send either everything
+  queued or to reach the default maximum frame size of
+  16384 bytes.
+
+* A new HTTP/2 option `max_receive_frame_rate` can be
+  used to control how fast the server is willing to receive
+  frames. By default it will accept 1000 frames every 10
+  seconds.
+
+* A new HTTP/2 option `max_reset_stream_rate` can be
+  used to control the rate of errors the server is
+  willing to accept. By default it will accept 10
+  stream resets every 10 seconds.
+
+* Flow control for incoming data has been implemented
+  for HTTP/1.1. Cowboy will now wait for the user code
+  to ask for the request body before reading it from
+  the socket. The option `initial_stream_flow_size`
+  controls how much data Cowboy will read without
+  being asked.
+
+* The HTTP/1.1 and HTTP/2 option `logger` is now
+  documented.
+
+* The Websocket option `validate_utf8` has been
+  added. It can be used to disable the expensive UTF-8
+  validation for incoming text and close frames.
+
+* The experimental commands based Websocket interface
+  is now considered stable and has been documented.
+  The old interface is now deprecated.
+
+* A new Websocket handler command `shutdown_reason`
+  can be used to change the normal exit reason of
+  Websocket processes. By default `normal` is used;
+  with this command the exit reason can be changed
+  to `{shutdown, ShutdownReason}`.
+
+* The experimental stream handlers `cowboy_metrics_h`
+  and `cowboy_tracer_h` are now considered stable and
+  have been documented.
+
+* The stream handler commands `set_options` and `log`
+  are now considered stable and have been documented.
+
+* The router is now capable of retrieving dispatch
+  rules directly from the `persistent_term` storage
+  (available starting from Erlang/OTP 21.2).
+
+* Support for the status codes 208 and 508 has been
+  added.
+
+* Update Ranch to 1.7.1.
+
+* Update Cowlib to 2.8.0.
+
+=== Experimental features added
+
+* It is now possible to read the response body from any
+  process, as well as doing any other `cowboy_req`
+  operations. Since this is not recommended due to
+  race condition concerns this feature will always
+  remain experimental.
+
+=== New functions
+
+* The function `cowboy_req:filter_cookies/2` has been
+  added. It can be called before parsing/matching
+  cookies in order to filter out undesirables. The
+  main reason for doing this is to avoid most parse
+  errors that may occur when dealing with Web browsers
+  (which have a string-based Javascript interface to
+  cookies that is very permissive of invalid content)
+  and to be able to recover in other cases.
+
+* The function `cowboy_req:cast/2` has been added.
+  It can be used to send events to stream handlers.
+
+=== Bugs fixed
+
+* A number of fixes and additions were made to address the
+  HTTP/2 CVEs CVE-2019-9511 through CVE-2019-9518, except
+  for CVE-2019-9513 which required no intervention as the
+  relevant protocol feature is not implemented by Cowboy.
+
+* The HTTP/2 connection window could become larger than the
+  protocol allows, leading to errors. This has been corrected.
+
+* The presence of empty header names in HTTP/2 requests now
+  results in the request to be rejected.
+
+* Cowboy will now remove headers specific to HTTP/1.1
+  (the hop by hop headers such as connection or upgrade)
+  when building an HTTP/2 response.
+
+* A bug in the HTTP/2 code that resulted in the failure to
+  fully send iolist response bodies has been fixed. Cowboy
+  would just wait indefinitely in those cases.
+
+* It was possible for a final empty HTTP/2 DATA frame to get
+  stuck and never sent when the window reached 0 and the remote
+  end did not increase the window anymore. This has been
+  corrected.
+
+* Cowboy now uses the host header when the HTTP/2
+  :authority pseudo header is missing. A common scenario
+  where this occurs is when proxies translate incoming
+  HTTP/1.1 requests to HTTP/2.
+
+* HTTP/1.1 connections are now properly closed when the
+  user code sends less data than advertised in the response
+  headers.
+
+* Cowboy will now close HTTP/1.1 connections immediately when
+  a header line is missing a colon separator. Previously it
+  was waiting for more data.
+
+* It was possible for Cowboy to receive stray timeout messages
+  for HTTP/1.1 connections, resulting in crashes. The timeout
+  handling in HTTP/1.1 has been reworked and the issue should
+  no longer occur.
+
+* The type for the Req object has been updated to accept
+  custom fields as was already documented.
+
+* The authentication scheme returned when parsing the
+  authorization header is now case insensitive, which
+  means it will be returned as lowercase.
+
+* Cowboy no longer discards data that follows a Websocket
+  upgrade request. Note that the protocol does not allow
+  sending data before receiving a successful Websocket
+  upgrade response, so this fix is more out of principle
+  rather than to fix a real world issue.
+
+* The `cowboy_static` handler will now properly detect
+  the type of files that have an uppercase or mixed
+  extension component.
+
+* The `cowboy_static` handler is now consistent across all
+  supported platforms. It now explicitly rejects `path_info`
+  components that include a forward slash, backward slash
+  or NUL character.
+
+* The update to Ranch 1.7.1 fixes an issue with the PROXY
+  protocol that would cause checksum verification to fail.
+
+* The HTTP/1.1 error reason for `stream_error` mistakenly
+  contained an extra element. It has now been removed.
+
+* The `PartialReq` given to the `early_error` stream handler
+  callback now includes headers when the protocol is HTTP/2.
+
+* A bug where the stacktrace was incorrect in error messages
+  has been fixed. The problem occurred when an exception
+  occurred in the handler's terminate callback.
+
+* The REST flowchart for POST, PATCH and PUT has received
+  a number of fixes and had to be greatly reworked as a
+  result. When the method is PUT, we do not check for
+  the location header in the response. When the resource
+  doesn't exist and the method was PUT the flowchart was
+  largely incorrect. A 415 response may occur after the
+  `content_types_accepted` callback and was missing from
+  the flowchart.
+
+* The documentation for `content_types_accepted` now
+  includes the media type wildcard that was previously
+  missing.
+
+* The documentation for a type found in `cow_cookie`
+  was missing. A manual page for `cow_cookie` was added
+  and can be found in the Cowlib documentation.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.6/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.6/index.html
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@@ -0,0 +1,281 @@
+<!DOCTYPE html>
+<html lang="en">
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+
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+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.6 to 2.7</span></h1>
+
+<p>Cowboy 2.7 improves the HTTP/2 code with optimizations around the sending of DATA and WINDOW_UPDATE frames; graceful shutdown of the connection when the client is going away; and rate limiting mechanisms. New options and mechanisms have also been added to control the amount of memory Cowboy ends up using with both HTTP/1.1 and HTTP/2. Much, but not all, of this work was done to address HTTP/2 CVEs about potential denial of service.</p>
+<p>In addition, many of the experimental features introduced in previous releases have been marked stable and are now documented.</p>
+<p>Cowboy 2.7 requires Erlang/OTP 20.0 or greater.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Cowboy is now compatible with both Ranch 1.7 and the upcoming Ranch 2.0.
+</li>
+<li>The number of HTTP/2 WINDOW_UPDATE frames Cowboy sends has been greatly reduced. Cowboy now applies heuristics to determine whether it is necessary to update the window, based on the current window size and the amount of data requested by streams (the <code>cowboy_req:read_body/2</code> length for example). Six new options have been added to control this behavior: <code>connection_window_margin_size</code>, <code>connection_window_update_threshold</code>, <code>max_connection_window_size</code>, <code>max_stream_window_size</code>, <code>stream_window_margin_size</code> and <code>stream_window_update_threshold</code>.
+</li>
+<li>HTTP/2 connections will now be shut down gracefully when receiving a GOAWAY frame. Cowboy will simply wait for existing streams to finish before closing the connection.
+</li>
+<li>Functions that stream the response body now have backpressure applied. They now wait for a message to be sent back. The message will be held off when using HTTP/2 and the buffer sizes exceed either <code>max_connection_buffer_size</code> or <code>max_stream_buffer_size</code>. For HTTP/1.1 the data is sent synchronously and we rely instead on the TCP backpressure.
+</li>
+<li>A new HTTP/2 option <code>stream_window_data_threshold</code> can be used to control how little the DATA frames that Cowboy sends can get. By default Cowboy will wait for the window to be large enough to send either everything queued or to reach the default maximum frame size of 16384 bytes.
+</li>
+<li>A new HTTP/2 option <code>max_receive_frame_rate</code> can be used to control how fast the server is willing to receive frames. By default it will accept 1000 frames every 10 seconds.
+</li>
+<li>A new HTTP/2 option <code>max_reset_stream_rate</code> can be used to control the rate of errors the server is willing to accept. By default it will accept 10 stream resets every 10 seconds.
+</li>
+<li>Flow control for incoming data has been implemented for HTTP/1.1. Cowboy will now wait for the user code to ask for the request body before reading it from the socket. The option <code>initial_stream_flow_size</code> controls how much data Cowboy will read without being asked.
+</li>
+<li>The HTTP/1.1 and HTTP/2 option <code>logger</code> is now documented.
+</li>
+<li>The Websocket option <code>validate_utf8</code> has been added. It can be used to disable the expensive UTF-8 validation for incoming text and close frames.
+</li>
+<li>The experimental commands based Websocket interface is now considered stable and has been documented. The old interface is now deprecated.
+</li>
+<li>A new Websocket handler command <code>shutdown_reason</code> can be used to change the normal exit reason of Websocket processes. By default <code>normal</code> is used; with this command the exit reason can be changed to <code>{shutdown, ShutdownReason}</code>.
+</li>
+<li>The experimental stream handlers <code>cowboy_metrics_h</code> and <code>cowboy_tracer_h</code> are now considered stable and have been documented.
+</li>
+<li>The stream handler commands <code>set_options</code> and <code>log</code> are now considered stable and have been documented.
+</li>
+<li>The router is now capable of retrieving dispatch rules directly from the <code>persistent_term</code> storage (available starting from Erlang/OTP 21.2).
+</li>
+<li>Support for the status codes 208 and 508 has been added.
+</li>
+<li>Update Ranch to 1.7.1.
+</li>
+<li>Update Cowlib to 2.8.0.
+</li>
+</ul>
+<h2 id="_experimental_features_added">Experimental features added</h2>
+<ul><li>It is now possible to read the response body from any process, as well as doing any other <code>cowboy_req</code> operations. Since this is not recommended due to race condition concerns this feature will always remain experimental.
+</li>
+</ul>
+<h2 id="_new_functions">New functions</h2>
+<ul><li>The function <code>cowboy_req:filter_cookies/2</code> has been added. It can be called before parsing/matching cookies in order to filter out undesirables. The main reason for doing this is to avoid most parse errors that may occur when dealing with Web browsers (which have a string-based Javascript interface to cookies that is very permissive of invalid content) and to be able to recover in other cases.
+</li>
+<li>The function <code>cowboy_req:cast/2</code> has been added. It can be used to send events to stream handlers.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>A number of fixes and additions were made to address the HTTP/2 CVEs CVE-2019-9511 through CVE-2019-9518, except for CVE-2019-9513 which required no intervention as the relevant protocol feature is not implemented by Cowboy.
+</li>
+<li>The HTTP/2 connection window could become larger than the protocol allows, leading to errors. This has been corrected.
+</li>
+<li>The presence of empty header names in HTTP/2 requests now results in the request to be rejected.
+</li>
+<li>Cowboy will now remove headers specific to HTTP/1.1 (the hop by hop headers such as connection or upgrade) when building an HTTP/2 response.
+</li>
+<li>A bug in the HTTP/2 code that resulted in the failure to fully send iolist response bodies has been fixed. Cowboy would just wait indefinitely in those cases.
+</li>
+<li>It was possible for a final empty HTTP/2 DATA frame to get stuck and never sent when the window reached 0 and the remote end did not increase the window anymore. This has been corrected.
+</li>
+<li>Cowboy now uses the host header when the HTTP/2 :authority pseudo header is missing. A common scenario where this occurs is when proxies translate incoming HTTP/1.1 requests to HTTP/2.
+</li>
+<li>HTTP/1.1 connections are now properly closed when the user code sends less data than advertised in the response headers.
+</li>
+<li>Cowboy will now close HTTP/1.1 connections immediately when a header line is missing a colon separator. Previously it was waiting for more data.
+</li>
+<li>It was possible for Cowboy to receive stray timeout messages for HTTP/1.1 connections, resulting in crashes. The timeout handling in HTTP/1.1 has been reworked and the issue should no longer occur.
+</li>
+<li>The type for the Req object has been updated to accept custom fields as was already documented.
+</li>
+<li>The authentication scheme returned when parsing the authorization header is now case insensitive, which means it will be returned as lowercase.
+</li>
+<li>Cowboy no longer discards data that follows a Websocket upgrade request. Note that the protocol does not allow sending data before receiving a successful Websocket upgrade response, so this fix is more out of principle rather than to fix a real world issue.
+</li>
+<li>The <code>cowboy_static</code> handler will now properly detect the type of files that have an uppercase or mixed extension component.
+</li>
+<li>The <code>cowboy_static</code> handler is now consistent across all supported platforms. It now explicitly rejects <code>path_info</code> components that include a forward slash, backward slash or NUL character.
+</li>
+<li>The update to Ranch 1.7.1 fixes an issue with the PROXY protocol that would cause checksum verification to fail.
+</li>
+<li>The HTTP/1.1 error reason for <code>stream_error</code> mistakenly contained an extra element. It has now been removed.
+</li>
+<li>The <code>PartialReq</code> given to the <code>early_error</code> stream handler callback now includes headers when the protocol is HTTP/2.
+</li>
+<li>A bug where the stacktrace was incorrect in error messages has been fixed. The problem occurred when an exception occurred in the handler&apos;s terminate callback.
+</li>
+<li>The REST flowchart for POST, PATCH and PUT has received a number of fixes and had to be greatly reworked as a result. When the method is PUT, we do not check for the location header in the response. When the resource doesn&apos;t exist and the method was PUT the flowchart was largely incorrect. A 415 response may occur after the <code>content_types_accepted</code> callback and was missing from the flowchart.
+</li>
+<li>The documentation for <code>content_types_accepted</code> now includes the media type wildcard that was previously missing.
+</li>
+<li>The documentation for a type found in <code>cow_cookie</code> was missing. A manual page for <code>cow_cookie</code> was added and can be found in the Cowlib documentation.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.7/">
+					Migrating from Cowboy 2.7 to 2.8
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.5/">
+					Migrating from Cowboy 2.5 to 2.6
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+      <footer>
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+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.7.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.7.asciidoc
new file mode 100644
index 00000000..1e52130c
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.7.asciidoc
@@ -0,0 +1,118 @@
+[appendix]
+== Migrating from Cowboy 2.7 to 2.8
+
+Cowboy 2.8 contains many optimizations for all
+protocols. HTTP/1.1 has received the largest
+improvements and Cowboy will now be able to
+handle noticeably more requests. Thanks to
+the folks at Stressgrid for helping identify that
+the performance was lower than it should have been
+and for benchmarking my many changes and experiments.
+
+Cowboy 2.8 also contains a small number of tweaks
+and bug fixes. Cowboy 2.8 is the first Cowboy release,
+ever, to be consistently green on all tested platforms.
+This is mostly due to the reworking of some test cases,
+but a few bugs were discovered and fixed in the process.
+
+Cowboy 2.8 requires Erlang/OTP 22.0 or greater. It may
+also work out of the box with Erlang/OTP 21.3 but this
+was not tested and is not supported.
+
+=== Features added
+
+* Cowboy will now use `active,N` instead of `active,once`
+  to receive data from the socket. This greatly improves
+  the performance and allows Cowboy to process more
+  requests, especially for HTTP/1.1. The `active_n`
+  protocol option can be configured to change the
+  `active,N` value. The default is 100 for all protocols.
+
+* Add a `linger_timeout` option for HTTP/2. The default
+  is 1000, or one second. This helps ensure that the
+  final GOAWAY frame will be properly received by clients.
+
+* The function `cowboy_req:parse_header/2,3` will now
+  parse the headers `access-control-request-headers`,
+  `access-control-request-method`, `content-encoding`,
+  `content-language`, `max-forwards`, `origin`,
+  `proxy-authorization` and `trailer`.
+
+* A Performance chapter has been added to the guide.
+  More content will be added in future releases.
+
+* Update Cowlib to 2.9.1.
+
+=== Experimental features added
+
+* A `protocols` protocol option allows configuring which
+  protocol will be used for clear listeners. Setting it
+  to `[http2]` will disable HTTP/1.1 entirely. This feature
+  will be extended in a future release.
+
+=== Features modified
+
+* The default value for HTTP/1.1's `max_keepalive` option
+  has been increased. It now allows 1000 requests before
+  gracefully closing the connection.
+
+* The default value for HTTP/2's `max_received_frame_rate`
+  option has been increased. It now allows 10000 frames every
+  10 seconds.
+
+* Cowboy will now accept whitespace in cookie names. This
+  is in line with the recommended parsing algorithm for the
+  upcoming cookie RFC update, and corresponds to what browsers
+  are doing.
+
+=== Bugs fixed
+
+* The number of Transport:send/2 calls has been optimized
+  for HTTP/2. Reducing the number of calls has a noticeable
+  impact on the number of requests that can be processed.
+
+* Trying to use `cowboy_req:reply/4` with a status code of
+  204 or 304 and a non-empty response body will now result
+  in a crash. Using `cowboy_req:stream_reply/2,3` with 204
+  or 304 and then attempting to send a body will also result
+  in a crash. These status codes disallow response bodies
+  and trying to send one will break HTTP/1.1 framing.
+
+* A crash has been fixed related to HTTP/1.1 pipelining.
+  The bug was most likely introduced in Cowboy 2.6 when
+  flow control was added for HTTP/1.1 request bodies.
+
+* The HTTP/1.1 protocol code could get stuck because of flow
+  control. This has been corrected.
+
+* A crash has been fixed for HTTP/1.1. It occurred when
+  a flow control update was requested (such as reading
+  the request body) after the body was fully read.
+
+* The timeout was incorrectly reset sometimes when a stream
+  (a pair of request/response) terminated. This has been
+  corrected.
+
+* Handling of hibernation for Websocket has been improved.
+  Websocket over HTTP/2 now supports hibernating. Stray
+  messages no longer cancel hibernation.
+
+* The `cowboy_compress_h` stream handler will now ignore
+  malformed accept-encoding headers instead of crashing.
+
+* The manual pages for `cowboy:start_clear(3)` and
+  `cowboy:start_tls(3)` now mentions that some protocol
+  options may be documented in the releevant stream
+  handler.
+
+* The manual page for `cowboy_req:parse_header(3)` was
+  corrected. When an unsupported header is given the
+  function crashes, it does not return an `undefined` tuple.
+
+* The routing algorithm description in the user guide has
+  been improved.
+
+* The test suites are now consistently green on all tested
+  platforms. Most of the test failures were caused by flaky
+  tests. Avoiding the use of timeouts fixed most of them.
+  A small number of tests had to be reworked.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.7/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.7/index.html
new file mode 100644
index 00000000..21fb2456
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.7/index.html
@@ -0,0 +1,237 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.7 to 2.8</title>
+
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+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.7 to 2.8</span></h1>
+
+<p>Cowboy 2.8 contains many optimizations for all protocols. HTTP/1.1 has received the largest improvements and Cowboy will now be able to handle noticeably more requests. Thanks to the folks at Stressgrid for helping identify that the performance was lower than it should have been and for benchmarking my many changes and experiments.</p>
+<p>Cowboy 2.8 also contains a small number of tweaks and bug fixes. Cowboy 2.8 is the first Cowboy release, ever, to be consistently green on all tested platforms. This is mostly due to the reworking of some test cases, but a few bugs were discovered and fixed in the process.</p>
+<p>Cowboy 2.8 requires Erlang/OTP 22.0 or greater. It may also work out of the box with Erlang/OTP 21.3 but this was not tested and is not supported.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Cowboy will now use <code>active,N</code> instead of <code>active,once</code> to receive data from the socket. This greatly improves the performance and allows Cowboy to process more requests, especially for HTTP/1.1. The <code>active_n</code> protocol option can be configured to change the <code>active,N</code> value. The default is 100 for all protocols.
+</li>
+<li>Add a <code>linger_timeout</code> option for HTTP/2. The default is 1000, or one second. This helps ensure that the final GOAWAY frame will be properly received by clients.
+</li>
+<li>The function <code>cowboy_req:parse_header/2,3</code> will now parse the headers <code>access-control-request-headers</code>, <code>access-control-request-method</code>, <code>content-encoding</code>, <code>content-language</code>, <code>max-forwards</code>, <code>origin</code>, <code>proxy-authorization</code> and <code>trailer</code>.
+</li>
+<li>A Performance chapter has been added to the guide. More content will be added in future releases.
+</li>
+<li>Update Cowlib to 2.9.1.
+</li>
+</ul>
+<h2 id="_experimental_features_added">Experimental features added</h2>
+<ul><li>A <code>protocols</code> protocol option allows configuring which protocol will be used for clear listeners. Setting it to <code>[http2]</code> will disable HTTP/1.1 entirely. This feature will be extended in a future release.
+</li>
+</ul>
+<h2 id="_features_modified">Features modified</h2>
+<ul><li>The default value for HTTP/1.1&apos;s <code>max_keepalive</code> option has been increased. It now allows 1000 requests before gracefully closing the connection.
+</li>
+<li>The default value for HTTP/2&apos;s <code>max_received_frame_rate</code> option has been increased. It now allows 10000 frames every 10 seconds.
+</li>
+<li>Cowboy will now accept whitespace in cookie names. This is in line with the recommended parsing algorithm for the upcoming cookie RFC update, and corresponds to what browsers are doing.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>The number of Transport:send/2 calls has been optimized for HTTP/2. Reducing the number of calls has a noticeable impact on the number of requests that can be processed.
+</li>
+<li>Trying to use <code>cowboy_req:reply/4</code> with a status code of 204 or 304 and a non-empty response body will now result in a crash. Using <code>cowboy_req:stream_reply/2,3</code> with 204 or 304 and then attempting to send a body will also result in a crash. These status codes disallow response bodies and trying to send one will break HTTP/1.1 framing.
+</li>
+<li>A crash has been fixed related to HTTP/1.1 pipelining. The bug was most likely introduced in Cowboy 2.6 when flow control was added for HTTP/1.1 request bodies.
+</li>
+<li>The HTTP/1.1 protocol code could get stuck because of flow control. This has been corrected.
+</li>
+<li>A crash has been fixed for HTTP/1.1. It occurred when a flow control update was requested (such as reading the request body) after the body was fully read.
+</li>
+<li>The timeout was incorrectly reset sometimes when a stream (a pair of request/response) terminated. This has been corrected.
+</li>
+<li>Handling of hibernation for Websocket has been improved. Websocket over HTTP/2 now supports hibernating. Stray messages no longer cancel hibernation.
+</li>
+<li>The <code>cowboy_compress_h</code> stream handler will now ignore malformed accept-encoding headers instead of crashing.
+</li>
+<li>The manual pages for <code>cowboy:start_clear(3)</code> and <code>cowboy:start_tls(3)</code> now mentions that some protocol options may be documented in the releevant stream handler.
+</li>
+<li>The manual page for <code>cowboy_req:parse_header(3)</code> was corrected. When an unsupported header is given the function crashes, it does not return an <code>undefined</code> tuple.
+</li>
+<li>The routing algorithm description in the user guide has been improved.
+</li>
+<li>The test suites are now consistently green on all tested platforms. Most of the test failures were caused by flaky tests. Avoiding the use of timeouts fixed most of them. A small number of tests had to be reworked.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.8/">
+					Migrating from Cowboy 2.8 to 2.9
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.6/">
+					Migrating from Cowboy 2.6 to 2.7
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.8.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.8.asciidoc
new file mode 100644
index 00000000..a3a0e7c2
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.8.asciidoc
@@ -0,0 +1,50 @@
+[appendix]
+== Migrating from Cowboy 2.8 to 2.9
+
+Cowboy 2.9 implements graceful shutdown of connection
+processes for both HTTP/1.1 and HTTP/2 connections.
+
+Cowboy 2.9 is the first release to support the much
+awaited Erlang/OTP 24 out of the box. While users that
+were using Ranch 2.0 already were ready for OTP 24,
+the Ranch version used by Cowboy out of the box was
+not compatible and had to be updated.
+
+Cowboy 2.9 also contains a small number of tweaks
+and bug fixes.
+
+Cowboy 2.9 requires Erlang/OTP 22.0 or greater.
+
+=== Features added
+
+* Cowboy will now gracefully shutdown HTTP/1.1 and HTTP/2
+  connections when the supervisor asks the connection
+  process to exit, or when `sys:terminate/2,3` is used.
+  Two new configuration options were added for HTTP/2
+  to determine the timeouts for the graceful shutdown
+  steps.
+
+* REST handler `AcceptCallback` can now return `{created, URI}`
+  or `{see_other, URI}` to determine what response status code
+  should be sent (typically to differentiate between a new
+  resource and an update). The return value `{true, URI}` is
+  now deprecated.
+
+* Update Ranch to 1.8.0.
+
+* Update Cowlib to 2.11.0.
+
+=== Bugs fixed
+
+* Fix concurrent body streaming getting stuck with HTTP/2.
+  The alarm could get into blocking state indefinitely
+  when two or more request processes were streaming bodies.
+
+* Fix HTTP/2 rate limiting using the wrong default values
+  in some cases.
+
+* Don't produce an error report when the request process
+  exited normally (`normal` or `shutdown` exit reasons).
+
+* Fix `cowboy_tracer_h` to support trace messages without
+  timestamps.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.8/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.8/index.html
new file mode 100644
index 00000000..7c8526dd
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.8/index.html
@@ -0,0 +1,208 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.8 to 2.9</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.8 to 2.9</span></h1>
+
+<p>Cowboy 2.9 implements graceful shutdown of connection processes for both HTTP/1.1 and HTTP/2 connections.</p>
+<p>Cowboy 2.9 is the first release to support the much awaited Erlang/OTP 24 out of the box. While users that were using Ranch 2.0 already were ready for OTP 24, the Ranch version used by Cowboy out of the box was not compatible and had to be updated.</p>
+<p>Cowboy 2.9 also contains a small number of tweaks and bug fixes.</p>
+<p>Cowboy 2.9 requires Erlang/OTP 22.0 or greater.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Cowboy will now gracefully shutdown HTTP/1.1 and HTTP/2 connections when the supervisor asks the connection process to exit, or when <code>sys:terminate/2,3</code> is used. Two new configuration options were added for HTTP/2 to determine the timeouts for the graceful shutdown steps.
+</li>
+<li>REST handler <code>AcceptCallback</code> can now return <code>{created, URI}</code> or <code>{see_other, URI}</code> to determine what response status code should be sent (typically to differentiate between a new resource and an update). The return value <code>{true, URI}</code> is now deprecated.
+</li>
+<li>Update Ranch to 1.8.0.
+</li>
+<li>Update Cowlib to 2.11.0.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Fix concurrent body streaming getting stuck with HTTP/2. The alarm could get into blocking state indefinitely when two or more request processes were streaming bodies.
+</li>
+<li>Fix HTTP/2 rate limiting using the wrong default values in some cases.
+</li>
+<li>Don&apos;t produce an error report when the request process exited normally (<code>normal</code> or <code>shutdown</code> exit reasons).
+</li>
+<li>Fix <code>cowboy_tracer_h</code> to support trace messages without timestamps.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.9/">
+					Migrating from Cowboy 2.9 to 2.10
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.7/">
+					Migrating from Cowboy 2.7 to 2.8
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.9.asciidoc b/docs/en/cowboy/2.13/guide/migrating_from_2.9.asciidoc
new file mode 100644
index 00000000..7395e5f1
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.9.asciidoc
@@ -0,0 +1,42 @@
+[appendix]
+== Migrating from Cowboy 2.9 to 2.10
+
+Cowboy 2.10 is a maintenance release adding support
+for Erlang/OTP 26. The main change is a Cowlib update
+to fix a compilation error that only occurs starting
+from OTP 26.
+
+Cowboy 2.10 requires Erlang/OTP 22.0 or greater.
+
+=== Features added
+
+* Add support for `Default` value of SameSite
+  cookie attribute.
+
+* Add support for the `stale-*` cache-control directives
+  from RFC 5861.
+
+* Update Cowlib to 2.12.1.
+
+=== Bugs fixed
+
+* Fix a compilation error in Cowlib when using Erlang/OTP 26.
+
+* Fix data sent after RST_STREAM in HTTP/2 in rare cases.
+
+* Fix parsing of RST_STREAM frames to properly handle
+  frames that have a valid length but were not fully
+  received yet.
+
+* Remove the obsolete `Version` cookie attribute.
+
+* Handle more edge cases for cookie parsing based on updates
+  to the RFC 6265bis draft.
+
+* Make Basic auth parsing ignore unknown authentication
+  parameters and generally update the code to conform
+  to RFC 7617.
+
+* Fix URI template reserved expansion of %-encoded.
+
+* Update structured headers implementation to RFC 8941.
diff --git a/docs/en/cowboy/2.13/guide/migrating_from_2.9/index.html b/docs/en/cowboy/2.13/guide/migrating_from_2.9/index.html
new file mode 100644
index 00000000..26fc7947
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/migrating_from_2.9/index.html
@@ -0,0 +1,212 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Migrating from Cowboy 2.9 to 2.10</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Migrating from Cowboy 2.9 to 2.10</span></h1>
+
+<p>Cowboy 2.10 is a maintenance release adding support for Erlang/OTP 26. The main change is a Cowlib update to fix a compilation error that only occurs starting from OTP 26.</p>
+<p>Cowboy 2.10 requires Erlang/OTP 22.0 or greater.</p>
+<h2 id="_features_added">Features added</h2>
+<ul><li>Add support for <code>Default</code> value of SameSite cookie attribute.
+</li>
+<li>Add support for the <code>stale-*</code> cache-control directives from RFC 5861.
+</li>
+<li>Update Cowlib to 2.12.1.
+</li>
+</ul>
+<h2 id="_bugs_fixed">Bugs fixed</h2>
+<ul><li>Fix a compilation error in Cowlib when using Erlang/OTP 26.
+</li>
+<li>Fix data sent after RST_STREAM in HTTP/2 in rare cases.
+</li>
+<li>Fix parsing of RST_STREAM frames to properly handle frames that have a valid length but were not fully received yet.
+</li>
+<li>Remove the obsolete <code>Version</code> cookie attribute.
+</li>
+<li>Handle more edge cases for cookie parsing based on updates to the RFC 6265bis draft.
+</li>
+<li>Make Basic auth parsing ignore unknown authentication parameters and generally update the code to conform to RFC 7617.
+</li>
+<li>Fix URI template reserved expansion of %-encoded.
+</li>
+<li>Update structured headers implementation to RFC 8941.
+</li>
+</ul>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.10/">
+					Migrating from Cowboy 2.10 to 2.11
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.8/">
+					Migrating from Cowboy 2.8 to 2.9
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/modern_web.asciidoc b/docs/en/cowboy/2.13/guide/modern_web.asciidoc
new file mode 100644
index 00000000..48525732
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/modern_web.asciidoc
@@ -0,0 +1,122 @@
+[[modern_web]]
+== The modern Web
+
+Cowboy is a server for the modern Web. This chapter explains
+what it means and details all the standards involved.
+
+Cowboy supports all the standards listed in this document.
+
+=== HTTP/2
+
+HTTP/2 is the most efficient protocol for consuming Web
+services. It enables clients to keep a connection open
+for long periods of time; to send requests concurrently;
+to reduce the size of requests through HTTP headers
+compression; and more. The protocol is binary, greatly
+reducing the resources needed to parse it.
+
+HTTP/2 also enables the server to push messages to the
+client. This can be used for various purposes, including
+the sending of related resources before the client requests
+them, in an effort to reduce latency. This can also be used
+to enable bidirectional communication.
+
+Cowboy provides transparent support for HTTP/2. Clients
+that know it can use it; others fall back to HTTP/1.1
+automatically.
+
+HTTP/2 is compatible with the HTTP/1.1 semantics.
+
+HTTP/2 is defined by RFC 7540 and RFC 7541.
+
+=== HTTP/1.1
+
+HTTP/1.1 is the previous version of the HTTP protocol.
+The protocol itself is text-based and suffers from numerous
+issues and limitations. In particular it is not possible
+to execute requests concurrently (though pipelining is
+sometimes possible), and it's also sometimes difficult
+to detect that a client disconnected.
+
+HTTP/1.1 does provide very good semantics for interacting
+with Web services. It defines the standard methods, headers
+and status codes used by HTTP/1.1 and HTTP/2 clients and
+servers.
+
+HTTP/1.1 also defines compatibility with an older version
+of the protocol, HTTP/1.0, which was never really standardized
+across implementations.
+
+The core of HTTP/1.1 is defined by RFC 7230, RFC 7231,
+RFC 7232, RFC 7233, RFC 7234 and RFC 7235. Numerous RFCs
+and other specifications exist defining additional HTTP
+methods, status codes, headers or semantics.
+
+=== Websocket
+
+xref:ws_protocol[Websocket] is a protocol built on top of HTTP/1.1
+that provides a two-ways communication channel between the client and
+the server. Communication is asynchronous and can occur concurrently.
+
+It consists of a Javascript object allowing setting up a
+Websocket connection to the server, and a binary based
+protocol for sending data to the server or the client.
+
+Websocket connections can transfer either UTF-8 encoded text
+data or binary data. The protocol also includes support for
+implementing a ping/pong mechanism, allowing the server and
+the client to have more confidence that the connection is still
+alive.
+
+A Websocket connection can be used to transfer any kind of data,
+small or big, text or binary. Because of this Websocket is
+sometimes used for communication between systems.
+
+Websocket messages have no semantics on their own. Websocket
+is closer to TCP in that aspect, and requires you to design
+and implement your own protocol on top of it; or adapt an
+existing protocol to Websocket.
+
+Cowboy provides an interface known as xref:ws_handlers[Websocket handlers]
+that gives complete control over a Websocket connection.
+
+The Websocket protocol is defined by RFC 6455.
+
+=== Long-lived requests
+
+Cowboy provides an interface that can be used to support
+long-polling or to stream large amounts of data reliably,
+including using Server-Sent Events.
+
+Long-polling is a mechanism in which the client performs
+a request which may not be immediately answered by the
+server. It allows clients to request resources that may
+not currently exist, but are expected to be created soon,
+and which will be returned as soon as they are.
+
+Long-polling is essentially a hack, but it is widely used
+to overcome limitations on older clients and servers.
+
+Server-Sent Events is a small protocol defined as a media
+type, `text/event-stream`, along with a new HTTP header,
+`Last-Event-ID`. It is defined in the EventSource W3C
+specification.
+
+Cowboy provides an interface known as xref:loop_handlers[loop handlers]
+that facilitates the implementation of long-polling or stream
+mechanisms. It works regardless of the underlying protocol.
+
+=== REST
+
+xref:rest_principles[REST, or REpresentational State Transfer],
+is a style of architecture for loosely connected distributed
+systems. It can easily be implemented on top of HTTP.
+
+REST is essentially a set of constraints to be followed.
+Many of these constraints are purely architectural and
+solved by simply using HTTP. Some constraints must be
+explicitly followed by the developer.
+
+Cowboy provides an interface known as xref:rest_handlers[REST handlers]
+that simplifies the implementation of a REST API on top of
+the HTTP protocol.
diff --git a/docs/en/cowboy/2.13/guide/modern_web/index.html b/docs/en/cowboy/2.13/guide/modern_web/index.html
new file mode 100644
index 00000000..1b4b4f1c
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/modern_web/index.html
@@ -0,0 +1,211 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: The modern Web</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
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+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>The modern Web</span></h1>
+
+<p>Cowboy is a server for the modern Web. This chapter explains what it means and details all the standards involved.</p>
+<p>Cowboy supports all the standards listed in this document.</p>
+<h2 id="_http_2">HTTP/2</h2>
+<p>HTTP/2 is the most efficient protocol for consuming Web services. It enables clients to keep a connection open for long periods of time; to send requests concurrently; to reduce the size of requests through HTTP headers compression; and more. The protocol is binary, greatly reducing the resources needed to parse it.</p>
+<p>HTTP/2 also enables the server to push messages to the client. This can be used for various purposes, including the sending of related resources before the client requests them, in an effort to reduce latency. This can also be used to enable bidirectional communication.</p>
+<p>Cowboy provides transparent support for HTTP/2. Clients that know it can use it; others fall back to HTTP/1.1 automatically.</p>
+<p>HTTP/2 is compatible with the HTTP/1.1 semantics.</p>
+<p>HTTP/2 is defined by RFC 7540 and RFC 7541.</p>
+<h2 id="_http_1_1">HTTP/1.1</h2>
+<p>HTTP/1.1 is the previous version of the HTTP protocol. The protocol itself is text-based and suffers from numerous issues and limitations. In particular it is not possible to execute requests concurrently (though pipelining is sometimes possible), and it&apos;s also sometimes difficult to detect that a client disconnected.</p>
+<p>HTTP/1.1 does provide very good semantics for interacting with Web services. It defines the standard methods, headers and status codes used by HTTP/1.1 and HTTP/2 clients and servers.</p>
+<p>HTTP/1.1 also defines compatibility with an older version of the protocol, HTTP/1.0, which was never really standardized across implementations.</p>
+<p>The core of HTTP/1.1 is defined by RFC 7230, RFC 7231, RFC 7232, RFC 7233, RFC 7234 and RFC 7235. Numerous RFCs and other specifications exist defining additional HTTP methods, status codes, headers or semantics.</p>
+<h2 id="_websocket">Websocket</h2>
+<p><a href="../ws_protocol">Websocket</a> is a protocol built on top of HTTP/1.1 that provides a two-ways communication channel between the client and the server. Communication is asynchronous and can occur concurrently.</p>
+<p>It consists of a Javascript object allowing setting up a Websocket connection to the server, and a binary based protocol for sending data to the server or the client.</p>
+<p>Websocket connections can transfer either UTF-8 encoded text data or binary data. The protocol also includes support for implementing a ping/pong mechanism, allowing the server and the client to have more confidence that the connection is still alive.</p>
+<p>A Websocket connection can be used to transfer any kind of data, small or big, text or binary. Because of this Websocket is sometimes used for communication between systems.</p>
+<p>Websocket messages have no semantics on their own. Websocket is closer to TCP in that aspect, and requires you to design and implement your own protocol on top of it; or adapt an existing protocol to Websocket.</p>
+<p>Cowboy provides an interface known as <a href="../ws_handlers">Websocket handlers</a> that gives complete control over a Websocket connection.</p>
+<p>The Websocket protocol is defined by RFC 6455.</p>
+<h2 id="_long_lived_requests">Long-lived requests</h2>
+<p>Cowboy provides an interface that can be used to support long-polling or to stream large amounts of data reliably, including using Server-Sent Events.</p>
+<p>Long-polling is a mechanism in which the client performs a request which may not be immediately answered by the server. It allows clients to request resources that may not currently exist, but are expected to be created soon, and which will be returned as soon as they are.</p>
+<p>Long-polling is essentially a hack, but it is widely used to overcome limitations on older clients and servers.</p>
+<p>Server-Sent Events is a small protocol defined as a media type, <code>text/event-stream</code>, along with a new HTTP header, <code>Last-Event-ID</code>. It is defined in the EventSource W3C specification.</p>
+<p>Cowboy provides an interface known as <a href="../loop_handlers">loop handlers</a> that facilitates the implementation of long-polling or stream mechanisms. It works regardless of the underlying protocol.</p>
+<h2 id="_rest">REST</h2>
+<p><a href="../rest_principles">REST, or REpresentational State Transfer</a>, is a style of architecture for loosely connected distributed systems. It can easily be implemented on top of HTTP.</p>
+<p>REST is essentially a set of constraints to be followed. Many of these constraints are purely architectural and solved by simply using HTTP. Some constraints must be explicitly followed by the developer.</p>
+<p>Cowboy provides an interface known as <a href="../rest_handlers">REST handlers</a> that simplifies the implementation of a REST API on top of the HTTP protocol.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/erlang_web/">
+					Erlang and the Web
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+
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+      <footer>
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+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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diff --git a/docs/en/cowboy/2.13/guide/multipart.asciidoc b/docs/en/cowboy/2.13/guide/multipart.asciidoc
new file mode 100644
index 00000000..0825244c
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/multipart.asciidoc
@@ -0,0 +1,169 @@
+[[multipart]]
+== Multipart requests
+
+Multipart originates from MIME, an Internet standard that
+extends the format of emails.
+
+A multipart message is a list of parts. A part contains
+headers and a body. The body of the parts may be
+of any media type, and contain text or binary data.
+It is possible for parts to contain a multipart media
+type.
+
+In the context of HTTP, multipart is most often used
+with the `multipart/form-data` media type. It is what
+browsers use to upload files through HTML forms.
+
+The `multipart/byteranges` is also common. It is the
+media type used to send arbitrary bytes from a resource,
+enabling clients to resume downloads.
+
+=== Form-data
+
+In the normal case, when a form is submitted, the
+browser will use the `application/x-www-form-urlencoded`
+content-type. This type is just a list of keys and
+values and is therefore not fit for uploading files.
+
+That's where the `multipart/form-data` content-type
+comes in. When the form is configured to use this
+content-type, the browser will create a multipart
+message where each part corresponds to a field on
+the form. For files, it also adds some metadata in
+the part headers, like the file name.
+
+A form with a text input, a file input and a select
+choice box will result in a multipart message with
+three parts, one for each field.
+
+The browser does its best to determine the media type
+of the files it sends this way, but you should not
+rely on it for determining the contents of the file.
+Proper investigation of the contents is recommended.
+
+=== Checking for multipart messages
+
+The content-type header indicates the presence of
+a multipart message:
+
+[source,erlang]
+----
+{<<"multipart">>, <<"form-data">>, _}
+    = cowboy_req:parse_header(<<"content-type">>, Req).
+----
+
+=== Reading a multipart message
+
+Cowboy provides two sets of functions for reading
+request bodies as multipart messages.
+
+The `cowboy_req:read_part/1,2` functions return the
+next part's headers, if any.
+
+The `cowboy_req:read_part_body/1,2` functions return
+the current part's body. For large bodies you may
+need to call the function multiple times.
+
+To read a multipart message you need to iterate over
+all its parts:
+
+[source,erlang]
+----
+multipart(Req0) ->
+    case cowboy_req:read_part(Req0) of
+        {ok, _Headers, Req1} ->
+            {ok, _Body, Req} = cowboy_req:read_part_body(Req1),
+            multipart(Req);
+        {done, Req} ->
+            Req
+    end.
+----
+
+When part bodies are too large, Cowboy will return
+a `more` tuple, and allow you to loop until the part
+body has been fully read.
+
+The function `cow_multipart:form_data/1` can be used
+to quickly obtain information about a part from a
+`multipart/form-data` message. The function returns
+a `data` or a `file` tuple depending on whether this
+is a normal field or a file being uploaded.
+
+The following snippet will use this function and
+use different strategies depending on whether the
+part is a file:
+
+[source,erlang]
+----
+multipart(Req0) ->
+    case cowboy_req:read_part(Req0) of
+        {ok, Headers, Req1} ->
+            Req = case cow_multipart:form_data(Headers) of
+                {data, _FieldName} ->
+                    {ok, _Body, Req2} = cowboy_req:read_part_body(Req1),
+                    Req2;
+                {file, _FieldName, _Filename, _CType} ->
+                    stream_file(Req1)
+            end,
+            multipart(Req);
+        {done, Req} ->
+            Req
+    end.
+
+stream_file(Req0) ->
+    case cowboy_req:read_part_body(Req0) of
+        {ok, _LastBodyChunk, Req} ->
+            Req;
+        {more, _BodyChunk, Req} ->
+            stream_file(Req)
+    end.
+----
+
+Both the part header and body reading functions can take
+options that will be given to the request body reading
+functions. By default, `cowboy_req:read_part/1` reads
+up to 64KB for up to 5 seconds. `cowboy_req:read_part_body/1`
+has the same defaults as `cowboy_req:read_body/1`.
+
+To change the defaults for part headers:
+
+[source,erlang]
+cowboy_req:read_part(Req, #{length => 128000}).
+
+And for part bodies:
+
+[source,erlang]
+cowboy_req:read_part_body(Req, #{length => 1000000, period => 7000}).
+
+=== Skipping unwanted parts
+
+Part bodies do not have to be read. Cowboy will automatically
+skip it when you request the next part's body.
+
+The following snippet reads all part headers and skips
+all bodies:
+
+[source,erlang]
+----
+multipart(Req0) ->
+    case cowboy_req:read_part(Req0) of
+        {ok, _Headers, Req} ->
+            multipart(Req);
+        {done, Req} ->
+            Req
+    end.
+----
+
+Similarly, if you start reading the body and it ends up
+being too big, you can simply continue with the next part.
+Cowboy will automatically skip what remains.
+
+While Cowboy can skip part bodies automatically, the read
+rate is not configurable. Depending on your application
+you may want to skip manually, in particular if you observe
+poor performance while skipping.
+
+You do not have to read all parts either. You can stop
+reading as soon as you find the data you need.
+
+// @todo Cover the building of multipart messages.
diff --git a/docs/en/cowboy/2.13/guide/multipart/index.html b/docs/en/cowboy/2.13/guide/multipart/index.html
new file mode 100644
index 00000000..cc7310aa
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/multipart/index.html
@@ -0,0 +1,284 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Multipart requests</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Multipart requests</span></h1>
+
+<p>Multipart originates from MIME, an Internet standard that extends the format of emails.</p>
+<p>A multipart message is a list of parts. A part contains headers and a body. The body of the parts may be of any media type, and contain text or binary data. It is possible for parts to contain a multipart media type.</p>
+<p>In the context of HTTP, multipart is most often used with the <code>multipart/form-data</code> media type. It is what browsers use to upload files through HTML forms.</p>
+<p>The <code>multipart/byteranges</code> is also common. It is the media type used to send arbitrary bytes from a resource, enabling clients to resume downloads.</p>
+<h2 id="_form_data">Form-data</h2>
+<p>In the normal case, when a form is submitted, the browser will use the <code>application/x-www-form-urlencoded</code> content-type. This type is just a list of keys and values and is therefore not fit for uploading files.</p>
+<p>That&apos;s where the <code>multipart/form-data</code> content-type comes in. When the form is configured to use this content-type, the browser will create a multipart message where each part corresponds to a field on the form. For files, it also adds some metadata in the part headers, like the file name.</p>
+<p>A form with a text input, a file input and a select choice box will result in a multipart message with three parts, one for each field.</p>
+<p>The browser does its best to determine the media type of the files it sends this way, but you should not rely on it for determining the contents of the file. Proper investigation of the contents is recommended.</p>
+<h2 id="_checking_for_multipart_messages">Checking for multipart messages</h2>
+<p>The content-type header indicates the presence of a multipart message:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#990000">&lt;&lt;</font><font color="#FF0000">"multipart"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"form-data"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">_</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_reading_a_multipart_message">Reading a multipart message</h2>
+<p>Cowboy provides two sets of functions for reading request bodies as multipart messages.</p>
+<p>The <code>cowboy_req:read_part/1,2</code> functions return the next part&apos;s headers, if any.</p>
+<p>The <code>cowboy_req:read_part_body/1,2</code> functions return the current part&apos;s body. For large bodies you may need to call the function multiple times.</p>
+<p>To read a multipart message you need to iterate over all its parts:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">multipart</font></b>(<font color="#009900">Req0</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">_Headers</font>, <font color="#009900">Req1</font>} <font color="#990000">-&gt;</font>
+            {<font color="#FF6600">ok</font>, <font color="#009900">_Body</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_part_body</font></b>(<font color="#009900">Req1</font>),
+            <b><font color="#000000">multipart</font></b>(<font color="#009900">Req</font>);
+        {<font color="#FF6600">done</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <font color="#009900">Req</font>
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>When part bodies are too large, Cowboy will return a <code>more</code> tuple, and allow you to loop until the part body has been fully read.</p>
+<p>The function <code>cow_multipart:form_data/1</code> can be used to quickly obtain information about a part from a <code>multipart/form-data</code> message. The function returns a <code>data</code> or a <code>file</code> tuple depending on whether this is a normal field or a file being uploaded.</p>
+<p>The following snippet will use this function and use different strategies depending on whether the part is a file:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">multipart</font></b>(<font color="#009900">Req0</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">Headers</font>, <font color="#009900">Req1</font>} <font color="#990000">-&gt;</font>
+            <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#0000FF">case</font></b> <b><font color="#000000">cow_multipart:form_data</font></b>(<font color="#009900">Headers</font>) <b><font color="#0000FF">of</font></b>
+                {<font color="#FF6600">data</font>, <font color="#009900">_FieldName</font>} <font color="#990000">-&gt;</font>
+                    {<font color="#FF6600">ok</font>, <font color="#009900">_Body</font>, <font color="#009900">Req2</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_part_body</font></b>(<font color="#009900">Req1</font>),
+                    <font color="#009900">Req2</font>;
+                {<font color="#FF6600">file</font>, <font color="#009900">_FieldName</font>, <font color="#009900">_Filename</font>, <font color="#009900">_CType</font>} <font color="#990000">-&gt;</font>
+                    <b><font color="#000000">stream_file</font></b>(<font color="#009900">Req1</font>)
+            <b><font color="#0000FF">end</font></b>,
+            <b><font color="#000000">multipart</font></b>(<font color="#009900">Req</font>);
+        {<font color="#FF6600">done</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <font color="#009900">Req</font>
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font>
+
+<b><font color="#000000">stream_file</font></b>(<font color="#009900">Req0</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part_body</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">_LastBodyChunk</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <font color="#009900">Req</font>;
+        {<font color="#FF6600">more</font>, <font color="#009900">_BodyChunk</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">stream_file</font></b>(<font color="#009900">Req</font>)
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Both the part header and body reading functions can take options that will be given to the request body reading functions. By default, <code>cowboy_req:read_part/1</code> reads up to 64KB for up to 5 seconds. <code>cowboy_req:read_part_body/1</code> has the same defaults as <code>cowboy_req:read_body/1</code>.</p>
+<p>To change the defaults for part headers:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:read_part</font></b>(<font color="#009900">Req</font>, #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">128000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>And for part bodies:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:read_part_body</font></b>(<font color="#009900">Req</font>, #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">1000000</font>, <font color="#0000FF">period</font> <font color="#990000">=&gt;</font> <font color="#993399">7000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_skipping_unwanted_parts">Skipping unwanted parts</h2>
+<p>Part bodies do not have to be read. Cowboy will automatically skip it when you request the next part&apos;s body.</p>
+<p>The following snippet reads all part headers and skips all bodies:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">multipart</font></b>(<font color="#009900">Req0</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">_Headers</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">multipart</font></b>(<font color="#009900">Req</font>);
+        {<font color="#FF6600">done</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <font color="#009900">Req</font>
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Similarly, if you start reading the body and it ends up being too big, you can simply continue with the next part. Cowboy will automatically skip what remains.</p>
+<p>While Cowboy can skip part bodies automatically, the read rate is not configurable. Depending on your application you may want to skip manually, in particular if you observe poor performance while skipping.</p>
+<p>You do not have to read all parts either. You can stop reading as soon as you find the data you need.</p>
+<!-- @todo Cover the building of multipart messages.-->
+
+
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diff --git a/docs/en/cowboy/2.13/guide/performance.asciidoc b/docs/en/cowboy/2.13/guide/performance.asciidoc
new file mode 100644
index 00000000..10031302
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/performance.asciidoc
@@ -0,0 +1,29 @@
+[[performance]]
+== Performance
+
+This chapter describes the performance characteristics
+of Cowboy and offers suggestions to get the most
+performance out of your application.
+
+=== One process per connection
+
+The first version of Cowboy featured a single process
+per connection, whereas the current version of Cowboy
+features one process per connection plus one process
+per request. This has a negative impact on performance,
+but is necessary in order to provide a common interface
+for both HTTP/1.1 and HTTP/2 (as well as future HTTP
+versions).
+
+It is still possible to use a single process per
+connection, and avoid the creation of additional
+processes for each request, by implementing a
+stream handler to process the requests. This can
+be done for all requests, or just for a single
+endpoint depending on the application's needs.
+
+Stream handlers provide an asynchronous interface
+and must not block, so the implementation will
+be very different from normal Cowboy handlers,
+but the performance gains are important enough
+to justify it in some cases.
diff --git a/docs/en/cowboy/2.13/guide/performance/index.html b/docs/en/cowboy/2.13/guide/performance/index.html
new file mode 100644
index 00000000..24f8339e
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/performance/index.html
@@ -0,0 +1,189 @@
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+<h1 class="lined-header"><span>Performance</span></h1>
+
+<p>This chapter describes the performance characteristics of Cowboy and offers suggestions to get the most performance out of your application.</p>
+<h2 id="_one_process_per_connection">One process per connection</h2>
+<p>The first version of Cowboy featured a single process per connection, whereas the current version of Cowboy features one process per connection plus one process per request. This has a negative impact on performance, but is necessary in order to provide a common interface for both HTTP/1.1 and HTTP/2 (as well as future HTTP versions).</p>
+<p>It is still possible to use a single process per connection, and avoid the creation of additional processes for each request, by implementing a stream handler to process the requests. This can be done for all requests, or just for a single endpoint depending on the application&apos;s needs.</p>
+<p>Stream handlers provide an asynchronous interface and must not block, so the implementation will be very different from normal Cowboy handlers, but the performance gains are important enough to justify it in some cases.</p>
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+
+
diff --git a/docs/en/cowboy/2.13/guide/req.asciidoc b/docs/en/cowboy/2.13/guide/req.asciidoc
new file mode 100644
index 00000000..6b952284
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/req.asciidoc
@@ -0,0 +1,370 @@
+[[req]]
+== The Req object
+
+The Req object is a variable used for obtaining information
+about a request, read its body or send a response.
+
+It is not really an object in the object-oriented sense.
+It is a simple map that can be directly accessed or
+used when calling functions from the `cowboy_req` module.
+
+The Req object is the subject of a few different chapters.
+In this chapter we will learn about the Req object and
+look at how to retrieve information about the request.
+
+=== Direct access
+
+The Req map contains a number of fields which are documented
+and can be accessed directly. They are the fields that have
+a direct mapping to HTTP: the request `method`; the HTTP
+`version` used; the effective URI components `scheme`,
+`host`, `port`, `path` and `qs`; the request `headers`;
+the connection `peer` address and port; and the TLS
+certificate `cert` when applicable.
+
+Note that the `version` field can be used to determine
+whether a connection is using HTTP/2.
+
+To access a field, you can simply match in the function
+head. The following example sends a simple "Hello world!"
+response when the `method` is GET, and a 405 error
+otherwise.
+
+[source,erlang]
+----
+init(Req0=#{method := <<"GET">>}, State) ->
+    Req = cowboy_req:reply(200, #{
+        <<"content-type">> => <<"text/plain">>
+    }, <<"Hello world!">>, Req0),
+    {ok, Req, State};
+init(Req0, State) ->
+    Req = cowboy_req:reply(405, #{
+        <<"allow">> => <<"GET">>
+    }, Req0),
+    {ok, Req, State}.
+----
+
+Any other field is internal and should not be accessed.
+They may change in future releases, including maintenance
+releases, without notice.
+
+Modifying the Req object is allowed, but extra caution
+must be used when modifying existing fields. You can
+add as many new fields as necessary, however. Just make
+sure to namespace the field names so that no conflict
+can occur with future Cowboy updates or with third party
+projects.
+
+=== Introduction to the cowboy_req interface
+
+// @todo Link to cowboy_req manual
+
+Functions in the `cowboy_req` module provide access to
+the request information but also various operations that
+are common when dealing with HTTP requests.
+
+All the functions that begin with a verb indicate an action.
+Other functions simply return the corresponding value
+(sometimes that value does need to be built, but the
+cost of the operation is equivalent to retrieving a value).
+
+Some of the `cowboy_req` functions return an updated Req
+object. They are the read, reply, set and delete functions.
+While ignoring the returned Req will not cause incorrect
+behavior for some of them, it is highly recommended to
+always keep and use the last returned Req object. The
+manual for `cowboy_req` details these functions and what
+modifications are done to the Req object.
+
+Some of the calls to `cowboy_req` have side effects. This
+is the case of the read and reply functions. Cowboy reads
+the request body or replies immediately when the function
+is called.
+
+All functions will crash if something goes wrong. There
+is usually no need to catch these errors, Cowboy will
+send the appropriate 4xx or 5xx response depending on
+where the crash occurred.
+
+=== Request method
+
+The request method can be retrieved directly:
+
+[source, erlang]
+#{method := Method} = Req.
+
+Or using a function:
+
+[source,erlang]
+Method = cowboy_req:method(Req).
+
+The method is a case sensitive binary string. Standard
+methods include GET, HEAD, OPTIONS, PATCH, POST, PUT
+or DELETE.
+
+=== HTTP version
+
+The HTTP version is informational. It does not indicate that
+the client implements the protocol well or fully.
+
+There is typically no need to change behavior based on the
+HTTP version: Cowboy already does it for you.
+
+It can be useful in some cases, though. For example, one may
+want to redirect HTTP/1.1 clients to use Websocket, while HTTP/2
+clients keep using HTTP/2.
+
+The HTTP version can be retrieved directly:
+
+[source,erlang]
+#{version := Version} = Req.
+
+Or using a function:
+
+[source,erlang]
+Version = cowboy_req:version(Req).
+
+Cowboy defines the `'HTTP/1.0'`, `'HTTP/1.1'` and `'HTTP/2'`
+versions. Custom protocols can define their own values as
+atoms.
+
+=== Effective request URI
+
+The scheme, host, port, path and query string components
+of the effective request URI can all be retrieved directly:
+
+[source,erlang]
+----
+#{
+    scheme := Scheme,
+    host := Host,
+    port := Port,
+    path := Path,
+    qs := Qs
+} = Req.
+----
+
+Or using the related functions:
+
+[source,erlang]
+Scheme = cowboy_req:scheme(Req),
+Host = cowboy_req:host(Req),
+Port = cowboy_req:port(Req),
+Path = cowboy_req:path(Req).
+Qs = cowboy_req:qs(Req).
+
+The scheme and host are lowercased case insensitive binary
+strings. The port is an integer representing the port number.
+The path and query string are case sensitive binary strings.
+
+Cowboy defines only the `<<"http">>` and `<<"https">>` schemes.
+They are chosen so that the scheme will only be `<<"https">>`
+for requests on secure HTTP/1.1 or HTTP/2 connections.
+// @todo Is that tested well?
+
+The effective request URI itself can be reconstructed with
+the `cowboy_req:uri/1,2` function. By default, an absolute
+URI is returned:
+
+[source,erlang]
+%% scheme://host[:port]/path[?qs]
+URI = cowboy_req:uri(Req).
+
+Options are available to either disable or replace some
+or all of the components. Various URIs or URI formats can
+be generated this way, including the origin form:
+
+[source,erlang]
+%% /path[?qs]
+URI = cowboy_req:uri(Req, #{host => undefined}).
+
+The protocol relative form:
+
+[source,erlang]
+%% //host[:port]/path[?qs]
+URI = cowboy_req:uri(Req, #{scheme => undefined}).
+
+The absolute URI without a query string:
+
+[source,erlang]
+URI = cowboy_req:uri(Req, #{qs => undefined}).
+
+A different host:
+
+[source,erlang]
+URI = cowboy_req:uri(Req, #{host => <<"example.org">>}).
+
+And any other combination.
+
+=== Bindings
+
+Bindings are the host and path components that you chose
+to extract when defining the routes of your application.
+They are only available after the routing.
+
+Cowboy provides functions to retrieve one or all bindings.
+
+To retrieve a single value:
+
+[source,erlang]
+Value = cowboy_req:binding(userid, Req).
+
+When attempting to retrieve a value that was not bound,
+`undefined` will be returned. A different default value
+can be provided:
+
+[source,erlang]
+Value = cowboy_req:binding(userid, Req, 42).
+
+To retrieve everything that was bound:
+
+[source,erlang]
+Bindings = cowboy_req:bindings(Req).
+
+They are returned as a map, with keys being atoms.
+
+The Cowboy router also allows you to capture many host
+or path segments at once using the `...` qualifier.
+
+To retrieve the segments captured from the host name:
+
+[source,erlang]
+HostInfo = cowboy_req:host_info(Req).
+
+And the path segments:
+
+[source,erlang]
+PathInfo = cowboy_req:path_info(Req).
+
+Cowboy will return `undefined` if `...` was not used
+in the route.
+
+=== Query parameters
+
+Cowboy provides two functions to access query parameters.
+You can use the first to get the entire list of parameters.
+
+[source,erlang]
+QsVals = cowboy_req:parse_qs(Req),
+{_, Lang} = lists:keyfind(<<"lang">>, 1, QsVals).
+
+Cowboy will only parse the query string, and not do any
+transformation. This function may therefore return duplicates,
+or parameter names without an associated value. The order of
+the list returned is undefined.
+
+When a query string is `key=1&key=2`, the list returned will
+contain two parameters of name `key`.
+
+The same is true when trying to use the PHP-style suffix `[]`.
+When a query string is `key[]=1&key[]=2`, the list returned will
+contain two parameters of name `key[]`. Cowboy does not require
+the `[]` suffix to properly handle repeated key names.
+
+When a query string is simply `key`, Cowboy will return the
+list `[{<<"key">>, true}]`, using `true` to indicate that the
+parameter `key` was defined, but with no value.
+
+The second function Cowboy provides allows you to match out
+only the parameters you are interested in, and at the same
+time do any post processing you require using xref:constraints[constraints].
+This function returns a map.
+
+[source,erlang]
+#{id := ID, lang := Lang} = cowboy_req:match_qs([id, lang], Req).
+
+Constraints can be applied automatically. The following
+snippet will crash when the `id` parameter is not an integer,
+or when the `lang` parameter is empty. At the same time, the
+value for `id` will be converted to an integer term:
+
+[source,erlang]
+QsMap = cowboy_req:match_qs([{id, int}, {lang, nonempty}], Req).
+
+A default value may also be provided. The default will be used
+if the `lang` key is not found. It will not be used if
+the key is found but has an empty value.
+
+[source,erlang]
+#{lang := Lang} = cowboy_req:match_qs([{lang, [], <<"en-US">>}], Req).
+
+If no default is provided and the value is missing, the
+query string is deemed invalid and the process will crash.
+
+When the query string is `key=1&key=2`, the value for `key`
+will be the list `[<<"1">>, <<"2">>]`. Parameter names do not
+need to include the PHP-style suffix. Constraints may be used
+to ensure that only one value was given. Constraints do not
+automatically look inside the list, a custom constraint must
+be written if that is necessary.
+
+=== Headers
+
+Header values can be retrieved either as a binary string
+or parsed into a more meaningful representation.
+
+The get the raw value:
+
+[source,erlang]
+HeaderVal = cowboy_req:header(<<"content-type">>, Req).
+
+Cowboy expects all header names to be provided as lowercase
+binary strings. This is true for both requests and responses,
+regardless of the underlying protocol.
+
+When the header is missing from the request, `undefined`
+will be returned. A different default can be provided:
+
+[source,erlang]
+HeaderVal = cowboy_req:header(<<"content-type">>, Req, <<"text/plain">>).
+
+All headers can be retrieved at once, either directly:
+
+[source,erlang]
+#{headers := AllHeaders} = Req.
+
+Or using a function:
+
+[source,erlang]
+AllHeaders = cowboy_req:headers(Req).
+
+Cowboy provides equivalent functions to parse individual
+headers. There is no function to parse all headers at once.
+
+To parse a specific header:
+
+[source,erlang]
+ParsedVal = cowboy_req:parse_header(<<"content-type">>, Req).
+
+An exception will be thrown if it doesn't know how to parse the
+given header, or if the value is invalid. The list of known headers
+and default values can be found in the manual.
+
+When the header is missing, `undefined` is returned. You can
+change the default value. Note that it should be the parsed value
+directly:
+
+[source,erlang]
+----
+ParsedVal = cowboy_req:parse_header(<<"content-type">>, Req,
+    {<<"text">>, <<"plain">>, []}).
+----
+
+=== Peer
+
+The peer address and port number for the connection can be
+retrieved either directly or using a function.
+
+To retrieve the peer directly:
+
+[source,erlang]
+#{peer := {IP, Port}} = Req.
+
+And using a function:
+
+[source,erlang]
+{IP, Port} = cowboy_req:peer(Req).
+
+Note that the peer corresponds to the remote end of the
+connection to the server, which may or may not be the
+client itself. It may also be a proxy or a gateway.
diff --git a/docs/en/cowboy/2.13/guide/req/index.html b/docs/en/cowboy/2.13/guide/req/index.html
new file mode 100644
index 00000000..edc36221
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/req/index.html
@@ -0,0 +1,459 @@
+<!DOCTYPE html>
+<html lang="en">
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+
+<h1 class="lined-header"><span>The Req object</span></h1>
+
+<p>The Req object is a variable used for obtaining information about a request, read its body or send a response.</p>
+<p>It is not really an object in the object-oriented sense. It is a simple map that can be directly accessed or used when calling functions from the <code>cowboy_req</code> module.</p>
+<p>The Req object is the subject of a few different chapters. In this chapter we will learn about the Req object and look at how to retrieve information about the request.</p>
+<h2 id="_direct_access">Direct access</h2>
+<p>The Req map contains a number of fields which are documented and can be accessed directly. They are the fields that have a direct mapping to HTTP: the request <code>method</code>; the HTTP <code>version</code> used; the effective URI components <code>scheme</code>, <code>host</code>, <code>port</code>, <code>path</code> and <code>qs</code>; the request <code>headers</code>; the connection <code>peer</code> address and port; and the TLS certificate <code>cert</code> when applicable.</p>
+<p>Note that the <code>version</code> field can be used to determine whether a connection is using HTTP/2.</p>
+<p>To access a field, you can simply match in the function head. The following example sends a simple &quot;Hello world!&quot; response when the <code>method</code> is GET, and a 405 error otherwise.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req0</font><font color="#990000">=</font>#{<font color="#FF6600">method</font> <font color="#990000">:=</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"GET"</font><font color="#990000">&gt;&gt;</font>}, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+        <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>
+    }, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello world!"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>),
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>};
+<b><font color="#000000">init</font></b>(<font color="#009900">Req0</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">405</font>, #{
+        <font color="#990000">&lt;&lt;</font><font color="#FF0000">"allow"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"GET"</font><font color="#990000">&gt;&gt;</font>
+    }, <font color="#009900">Req0</font>),
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Any other field is internal and should not be accessed. They may change in future releases, including maintenance releases, without notice.</p>
+<p>Modifying the Req object is allowed, but extra caution must be used when modifying existing fields. You can add as many new fields as necessary, however. Just make sure to namespace the field names so that no conflict can occur with future Cowboy updates or with third party projects.</p>
+<h2 id="_introduction_to_the_cowboy_req_interface">Introduction to the cowboy_req interface</h2>
+<!-- @todo Link to cowboy_req manual-->
+<p>Functions in the <code>cowboy_req</code> module provide access to the request information but also various operations that are common when dealing with HTTP requests.</p>
+<p>All the functions that begin with a verb indicate an action. Other functions simply return the corresponding value (sometimes that value does need to be built, but the cost of the operation is equivalent to retrieving a value).</p>
+<p>Some of the <code>cowboy_req</code> functions return an updated Req object. They are the read, reply, set and delete functions. While ignoring the returned Req will not cause incorrect behavior for some of them, it is highly recommended to always keep and use the last returned Req object. The manual for <code>cowboy_req</code> details these functions and what modifications are done to the Req object.</p>
+<p>Some of the calls to <code>cowboy_req</code> have side effects. This is the case of the read and reply functions. Cowboy reads the request body or replies immediately when the function is called.</p>
+<p>All functions will crash if something goes wrong. There is usually no need to catch these errors, Cowboy will send the appropriate 4xx or 5xx response depending on where the crash occurred.</p>
+<h2 id="_request_method">Request method</h2>
+<p>The request method can be retrieved directly:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">method</font> <font color="#990000">:=</font> <font color="#009900">Method</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Or using a function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Method</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:method</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The method is a case sensitive binary string. Standard methods include GET, HEAD, OPTIONS, PATCH, POST, PUT or DELETE.</p>
+<h2 id="_http_version">HTTP version</h2>
+<p>The HTTP version is informational. It does not indicate that the client implements the protocol well or fully.</p>
+<p>There is typically no need to change behavior based on the HTTP version: Cowboy already does it for you.</p>
+<p>It can be useful in some cases, though. For example, one may want to redirect HTTP/1.1 clients to use Websocket, while HTTP/2 clients keep using HTTP/2.</p>
+<p>The HTTP version can be retrieved directly:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">version</font> <font color="#990000">:=</font> <font color="#009900">Version</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Or using a function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Version</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:version</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy defines the <code>&apos;HTTP/1.0&apos;</code>, <code>&apos;HTTP/1.1&apos;</code> and <code>&apos;HTTP/2&apos;</code> versions. Custom protocols can define their own values as atoms.</p>
+<h2 id="_effective_request_uri">Effective request URI</h2>
+<p>The scheme, host, port, path and query string components of the effective request URI can all be retrieved directly:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{
+    <font color="#FF6600">scheme</font> <font color="#990000">:=</font> <font color="#009900">Scheme</font>,
+    <font color="#FF6600">host</font> <font color="#990000">:=</font> <font color="#009900">Host</font>,
+    <font color="#FF6600">port</font> <font color="#990000">:=</font> <font color="#009900">Port</font>,
+    <font color="#FF6600">path</font> <font color="#990000">:=</font> <font color="#009900">Path</font>,
+    <font color="#FF6600">qs</font> <font color="#990000">:=</font> <font color="#009900">Qs</font>
+} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Or using the related functions:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Scheme</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:scheme</font></b>(<font color="#009900">Req</font>),
+<font color="#009900">Host</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:host</font></b>(<font color="#009900">Req</font>),
+<font color="#009900">Port</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:port</font></b>(<font color="#009900">Req</font>),
+<font color="#009900">Path</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:path</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font>
+<font color="#009900">Qs</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:qs</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The scheme and host are lowercased case insensitive binary strings. The port is an integer representing the port number. The path and query string are case sensitive binary strings.</p>
+<p>Cowboy defines only the <code>&lt;&lt;&quot;http&quot;&gt;&gt;</code> and <code>&lt;&lt;&quot;https&quot;&gt;&gt;</code> schemes. They are chosen so that the scheme will only be <code>&lt;&lt;&quot;https&quot;&gt;&gt;</code> for requests on secure HTTP/1.1 or HTTP/2 connections.</p>
+<!-- @todo Is that tested well?-->
+<p>The effective request URI itself can be reconstructed with the <code>cowboy_req:uri/1,2</code> function. By default, an absolute URI is returned:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% </font></i><u><font color="#0000FF">scheme://host</font></u><i><font color="#9A1900">[:port]/path[?qs]</font></i>
+<font color="#009900">URI</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Options are available to either disable or replace some or all of the components. Various URIs or URI formats can be generated this way, including the origin form:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% /path[?qs]</font></i>
+<font color="#009900">URI</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#000080">undefined</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The protocol relative form:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% //host[:port]/path[?qs]</font></i>
+<font color="#009900">URI</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">scheme</font> <font color="#990000">=&gt;</font> <font color="#000080">undefined</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The absolute URI without a query string:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">URI</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">qs</font> <font color="#990000">=&gt;</font> <font color="#000080">undefined</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>A different host:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">URI</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"example.org"</font><font color="#990000">&gt;&gt;</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>And any other combination.</p>
+<h2 id="_bindings">Bindings</h2>
+<p>Bindings are the host and path components that you chose to extract when defining the routes of your application. They are only available after the routing.</p>
+<p>Cowboy provides functions to retrieve one or all bindings.</p>
+<p>To retrieve a single value:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Value</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:binding</font></b>(<font color="#FF6600">userid</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>When attempting to retrieve a value that was not bound, <code>undefined</code> will be returned. A different default value can be provided:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Value</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:binding</font></b>(<font color="#FF6600">userid</font>, <font color="#009900">Req</font>, <font color="#993399">42</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>To retrieve everything that was bound:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Bindings</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:bindings</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>They are returned as a map, with keys being atoms.</p>
+<p>The Cowboy router also allows you to capture many host or path segments at once using the <code>...</code> qualifier.</p>
+<p>To retrieve the segments captured from the host name:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">HostInfo</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:host_info</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>And the path segments:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathInfo</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:path_info</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy will return <code>undefined</code> if <code>...</code> was not used in the route.</p>
+<h2 id="_query_parameters">Query parameters</h2>
+<p>Cowboy provides two functions to access query parameters. You can use the first to get the entire list of parameters.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">QsVals</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_qs</font></b>(<font color="#009900">Req</font>),
+{<font color="#990000">_</font>, <font color="#009900">Lang</font>} <font color="#990000">=</font> <b><font color="#000000">lists:keyfind</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"lang"</font><font color="#990000">&gt;&gt;</font>, <font color="#993399">1</font>, <font color="#009900">QsVals</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy will only parse the query string, and not do any transformation. This function may therefore return duplicates, or parameter names without an associated value. The order of the list returned is undefined.</p>
+<p>When a query string is <code>key=1&amp;key=2</code>, the list returned will contain two parameters of name <code>key</code>.</p>
+<p>The same is true when trying to use the PHP-style suffix <code>[]</code>. When a query string is <code>key[]=1&amp;key[]=2</code>, the list returned will contain two parameters of name <code>key[]</code>. Cowboy does not require the <code>[]</code> suffix to properly handle repeated key names.</p>
+<p>When a query string is simply <code>key</code>, Cowboy will return the list <code>[{&lt;&lt;&quot;key&quot;&gt;&gt;, true}]</code>, using <code>true</code> to indicate that the parameter <code>key</code> was defined, but with no value.</p>
+<p>The second function Cowboy provides allows you to match out only the parameters you are interested in, and at the same time do any post processing you require using <a href="../constraints">constraints</a>. This function returns a map.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_qs</font></b>([<font color="#FF6600">id</font>, <font color="#FF6600">lang</font>], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Constraints can be applied automatically. The following snippet will crash when the <code>id</code> parameter is not an integer, or when the <code>lang</code> parameter is empty. At the same time, the value for <code>id</code> will be converted to an integer term:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">QsMap</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_qs</font></b>([{<font color="#FF6600">id</font>, <font color="#FF6600">int</font>}, {<font color="#FF6600">lang</font>, <font color="#FF6600">nonempty</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>A default value may also be provided. The default will be used if the <code>lang</code> key is not found. It will not be used if the key is found but has an empty value.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_qs</font></b>([{<font color="#FF6600">lang</font>, [], <font color="#990000">&lt;&lt;</font><font color="#FF0000">"en-US"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>If no default is provided and the value is missing, the query string is deemed invalid and the process will crash.</p>
+<p>When the query string is <code>key=1&amp;key=2</code>, the value for <code>key</code> will be the list <code>[&lt;&lt;&quot;1&quot;&gt;&gt;, &lt;&lt;&quot;2&quot;&gt;&gt;]</code>. Parameter names do not need to include the PHP-style suffix. Constraints may be used to ensure that only one value was given. Constraints do not automatically look inside the list, a custom constraint must be written if that is necessary.</p>
+<h2 id="_headers">Headers</h2>
+<p>Header values can be retrieved either as a binary string or parsed into a more meaningful representation.</p>
+<p>The get the raw value:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">HeaderVal</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy expects all header names to be provided as lowercase binary strings. This is true for both requests and responses, regardless of the underlying protocol.</p>
+<p>When the header is missing from the request, <code>undefined</code> will be returned. A different default can be provided:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">HeaderVal</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>All headers can be retrieved at once, either directly:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">headers</font> <font color="#990000">:=</font> <font color="#009900">AllHeaders</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Or using a function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">AllHeaders</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:headers</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy provides equivalent functions to parse individual headers. There is no function to parse all headers at once.</p>
+<p>To parse a specific header:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">ParsedVal</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>An exception will be thrown if it doesn&apos;t know how to parse the given header, or if the value is invalid. The list of known headers and default values can be found in the manual.</p>
+<p>When the header is missing, <code>undefined</code> is returned. You can change the default value. Note that it should be the parsed value directly:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">ParsedVal</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>,
+    {<font color="#990000">&lt;&lt;</font><font color="#FF0000">"text"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"plain"</font><font color="#990000">&gt;&gt;</font>, []})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_peer">Peer</h2>
+<p>The peer address and port number for the connection can be retrieved either directly or using a function.</p>
+<p>To retrieve the peer directly:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">peer</font> <font color="#990000">:=</font> {<font color="#009900">IP</font>, <font color="#009900">Port</font>}} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>And using a function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#009900">IP</font>, <font color="#009900">Port</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:peer</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Note that the peer corresponds to the remote end of the connection to the server, which may or may not be the client itself. It may also be a proxy or a gateway.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/static_files/">
+					Static files
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/req_body/">
+					Reading the request body
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/guide/req_body.asciidoc b/docs/en/cowboy/2.13/guide/req_body.asciidoc
new file mode 100644
index 00000000..88389f64
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/req_body.asciidoc
@@ -0,0 +1,146 @@
+[[req_body]]
+== Reading the request body
+
+The request body can be read using the Req object.
+
+Cowboy will not attempt to read the body until requested.
+You need to call the body reading functions in order to
+retrieve it.
+
+Cowboy will not cache the body, it is therefore only
+possible to read it once.
+
+You are not required to read it, however. If a body is
+present and was not read, Cowboy will either cancel or
+skip its download, depending on the protocol.
+
+Cowboy provides functions for reading the body raw,
+and read and parse form urlencoded or xref:multipart[multipart bodies].
+The latter is covered in its own chapter.
+
+=== Request body presence
+
+Not all requests come with a body. You can check for
+the presence of a request body with this function:
+
+[source,erlang]
+cowboy_req:has_body(Req).
+
+It returns `true` if there is a body; `false` otherwise.
+
+In practice, this function is rarely used. When the
+method is `POST`, `PUT` or `PATCH`, the request body
+is often required by the application, which should
+just attempt to read it directly.
+
+=== Request body length
+
+You can obtain the length of the body:
+
+[source,erlang]
+Length = cowboy_req:body_length(Req).
+
+Note that the length may not be known in advance. In
+that case `undefined` will be returned. This can happen
+with HTTP/1.1's chunked transfer-encoding, or HTTP/2
+when no content-length was provided.
+
+Cowboy will update the body length in the Req object
+once the body has been read completely. A length will
+always be returned when attempting to call this function
+after reading the body completely.
+
+=== Reading the body
+
+You can read the entire body with one function call:
+
+[source,erlang]
+{ok, Data, Req} = cowboy_req:read_body(Req0).
+
+Cowboy returns an `ok` tuple when the body has been
+read fully.
+
+By default, Cowboy will attempt to read up to 8MB
+of data, for up to 15 seconds. The call will return
+once Cowboy has read at least 8MB of data, or at
+the end of the 15 seconds period.
+
+These values can be customized. For example, to read
+only up to 1MB for up to 5 seconds:
+
+[source,erlang]
+----
+{ok, Data, Req} = cowboy_req:read_body(Req0,
+    #{length => 1000000, period => 5000}).
+----
+
+These two options can effectively be used to control
+the rate of transmission of the request body.
+
+It is also possible to asynchronously read the request
+body using auto mode:
+
+[source,erlang]
+----
+Ref = make_ref(),
+cowboy_req:cast({read_body, self(), Ref, auto, infinity}, Req).
+----
+
+Cowboy will wait indefinitely for data and then send a
+`request_body` message as soon as it has data available,
+regardless of length.
+
+[source,erlang]
+----
+receive
+    {request_body, Ref, nofin, Data} ->
+        do_something(Data);
+    {request_body, Ref, fin, _BodyLen, Data} ->
+        do_something(Data)
+end.
+----
+
+Asynchronous reading of data pairs well with loop handlers.
+
+=== Streaming the body
+
+When the body is too large, the first call will return
+a `more` tuple instead of `ok`. You can call the
+function again to read more of the body, reading
+it one chunk at a time.
+
+[source,erlang]
+----
+read_body_to_console(Req0) ->
+    case cowboy_req:read_body(Req0) of
+        {ok, Data, Req} ->
+            io:format("~s", [Data]),
+            Req;
+        {more, Data, Req} ->
+            io:format("~s", [Data]),
+            read_body_to_console(Req)
+    end.
+----
+
+The `length` and `period` options can also be used.
+They need to be passed for every call.
+
+=== Reading a form urlencoded body
+
+Cowboy provides a convenient function for reading and
+parsing bodies sent as application/x-www-form-urlencoded.
+
+[source,erlang]
+{ok, KeyValues, Req} = cowboy_req:read_urlencoded_body(Req0).
+
+This function returns a list of key/values, exactly like
+the function `cowboy_req:parse_qs/1`.
+
+The defaults for this function are different. Cowboy will
+read for up to 64KB and up to 5 seconds. They can be modified:
+
+[source,erlang]
+----
+{ok, KeyValues, Req} = cowboy_req:read_urlencoded_body(Req0,
+    #{length => 4096, period => 3000}).
+----
diff --git a/docs/en/cowboy/2.13/guide/req_body/index.html b/docs/en/cowboy/2.13/guide/req_body/index.html
new file mode 100644
index 00000000..4023ebb8
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/req_body/index.html
@@ -0,0 +1,283 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+    <title>Nine Nines: Reading the request body</title>
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Reading the request body</span></h1>
+
+<p>The request body can be read using the Req object.</p>
+<p>Cowboy will not attempt to read the body until requested. You need to call the body reading functions in order to retrieve it.</p>
+<p>Cowboy will not cache the body, it is therefore only possible to read it once.</p>
+<p>You are not required to read it, however. If a body is present and was not read, Cowboy will either cancel or skip its download, depending on the protocol.</p>
+<p>Cowboy provides functions for reading the body raw, and read and parse form urlencoded or <a href="../multipart">multipart bodies</a>. The latter is covered in its own chapter.</p>
+<h2 id="_request_body_presence">Request body presence</h2>
+<p>Not all requests come with a body. You can check for the presence of a request body with this function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:has_body</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>It returns <code>true</code> if there is a body; <code>false</code> otherwise.</p>
+<p>In practice, this function is rarely used. When the method is <code>POST</code>, <code>PUT</code> or <code>PATCH</code>, the request body is often required by the application, which should just attempt to read it directly.</p>
+<h2 id="_request_body_length">Request body length</h2>
+<p>You can obtain the length of the body:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Length</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:body_length</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Note that the length may not be known in advance. In that case <code>undefined</code> will be returned. This can happen with HTTP/1.1&apos;s chunked transfer-encoding, or HTTP/2 when no content-length was provided.</p>
+<p>Cowboy will update the body length in the Req object once the body has been read completely. A length will always be returned when attempting to call this function after reading the body completely.</p>
+<h2 id="_reading_the_body">Reading the body</h2>
+<p>You can read the entire body with one function call:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_body</font></b>(<font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy returns an <code>ok</code> tuple when the body has been read fully.</p>
+<p>By default, Cowboy will attempt to read up to 8MB of data, for up to 15 seconds. The call will return once Cowboy has read at least 8MB of data, or at the end of the 15 seconds period.</p>
+<p>These values can be customized. For example, to read only up to 1MB for up to 5 seconds:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_body</font></b>(<font color="#009900">Req0</font>,
+    #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">1000000</font>, <font color="#0000FF">period</font> <font color="#990000">=&gt;</font> <font color="#993399">5000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>These two options can effectively be used to control the rate of transmission of the request body.</p>
+<p>It is also possible to asynchronously read the request body using auto mode:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Ref</font> <font color="#990000">=</font> <b><font color="#000080">make_ref</font></b>(),
+<b><font color="#000000">cowboy_req:cast</font></b>({<font color="#FF6600">read_body</font>, <b><font color="#000080">self</font></b>(), <font color="#009900">Ref</font>, <font color="#FF6600">auto</font>, <font color="#FF6600">infinity</font>}, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy will wait indefinitely for data and then send a <code>request_body</code> message as soon as it has data available, regardless of length.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#0000FF">receive</font></b>
+    {<font color="#FF6600">request_body</font>, <font color="#009900">Ref</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Data</font>} <font color="#990000">-&gt;</font>
+        <b><font color="#000000">do_something</font></b>(<font color="#009900">Data</font>);
+    {<font color="#FF6600">request_body</font>, <font color="#009900">Ref</font>, <font color="#FF6600">fin</font>, <font color="#009900">_BodyLen</font>, <font color="#009900">Data</font>} <font color="#990000">-&gt;</font>
+        <b><font color="#000000">do_something</font></b>(<font color="#009900">Data</font>)
+<b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Asynchronous reading of data pairs well with loop handlers.</p>
+<h2 id="_streaming_the_body">Streaming the body</h2>
+<p>When the body is too large, the first call will return a <code>more</code> tuple instead of <code>ok</code>. You can call the function again to read more of the body, reading it one chunk at a time.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_body_to_console</font></b>(<font color="#009900">Req0</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_body</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">io:format</font></b>(<font color="#FF0000">"~s"</font>, [<font color="#009900">Data</font>]),
+            <font color="#009900">Req</font>;
+        {<font color="#FF6600">more</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">io:format</font></b>(<font color="#FF0000">"~s"</font>, [<font color="#009900">Data</font>]),
+            <b><font color="#000000">read_body_to_console</font></b>(<font color="#009900">Req</font>)
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The <code>length</code> and <code>period</code> options can also be used. They need to be passed for every call.</p>
+<h2 id="_reading_a_form_urlencoded_body">Reading a form urlencoded body</h2>
+<p>Cowboy provides a convenient function for reading and parsing bodies sent as application/x-www-form-urlencoded.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">KeyValues</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_urlencoded_body</font></b>(<font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>This function returns a list of key/values, exactly like the function <code>cowboy_req:parse_qs/1</code>.</p>
+<p>The defaults for this function are different. Cowboy will read for up to 64KB and up to 5 seconds. They can be modified:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">KeyValues</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_urlencoded_body</font></b>(<font color="#009900">Req0</font>,
+    #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">4096</font>, <font color="#0000FF">period</font> <font color="#990000">=&gt;</font> <font color="#993399">3000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/req/">
+					The Req object
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/resp/">
+					Sending a response
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
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diff --git a/docs/en/cowboy/2.13/guide/resource_design.asciidoc b/docs/en/cowboy/2.13/guide/resource_design.asciidoc
new file mode 100644
index 00000000..125b437c
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/resource_design.asciidoc
@@ -0,0 +1,241 @@
+[[resource_design]]
+== Designing a resource handler
+
+This chapter aims to provide you with a list of questions
+you must answer in order to write a good resource handler.
+It is meant to be usable as a step by step guide.
+
+=== The service
+
+Can the service become unavailable, and when it does, can
+we detect it? For example, database connectivity problems
+may be detected early. We may also have planned outages
+of all or parts of the system. Implement the
+`service_available` callback.
+
+What HTTP methods does the service implement? Do we need
+more than the standard OPTIONS, HEAD, GET, PUT, POST,
+PATCH and DELETE? Are we not using one of those at all?
+Implement the `known_methods` callback.
+
+=== Type of resource handler
+
+Am I writing a handler for a collection of resources,
+or for a single resource?
+
+The semantics for each of these are quite different.
+You should not mix collection and single resource in
+the same handler.
+
+=== Collection handler
+
+Skip this section if you are not doing a collection.
+
+Is the collection hardcoded or dynamic? For example,
+if you use the route `/users` for the collection of
+users then the collection is hardcoded; if you use
+`/forums/:category` for the collection of threads
+then it isn't. When the collection is hardcoded you
+can safely assume the resource always exists.
+
+What methods should I implement?
+
+OPTIONS is used to get some information about the
+collection. It is recommended to allow it even if you
+do not implement it, as Cowboy has a default
+implementation built-in.
+
+HEAD and GET are used to retrieve the collection.
+If you allow GET, also allow HEAD as there's no extra
+work required to make it work.
+
+POST is used to create a new resource inside the
+collection. Creating a resource by using POST on
+the collection is useful when resources may be
+created before knowing their URI, usually because
+parts of it are generated dynamically. A common
+case is some kind of auto incremented integer
+identifier.
+
+The next methods are more rarely allowed.
+
+PUT is used to create a new collection (when
+the collection isn't hardcoded), or replace
+the entire collection.
+
+DELETE is used to delete the entire collection.
+
+PATCH is used to modify the collection using
+instructions given in the request body. A PATCH
+operation is atomic. The PATCH operation may
+be used for such things as reordering; adding,
+modifying or deleting parts of the collection.
+
+=== Single resource handler
+
+Skip this section if you are doing a collection.
+
+What methods should I implement?
+
+OPTIONS is used to get some information about the
+resource. It is recommended to allow it even if you
+do not implement it, as Cowboy has a default
+implementation built-in.
+
+HEAD and GET are used to retrieve the resource.
+If you allow GET, also allow HEAD as there's no extra
+work required to make it work.
+
+POST is used to update the resource.
+
+PUT is used to create a new resource (when it doesn't
+already exist) or replace the resource.
+
+DELETE is used to delete the resource.
+
+PATCH is used to modify the resource using
+instructions given in the request body. A PATCH
+operation is atomic. The PATCH operation may
+be used for adding, removing or modifying specific
+values in the resource.
+
+=== The resource
+
+Following the above discussion, implement the
+`allowed_methods` callback.
+
+Does the resource always exist? If it may not, implement
+the `resource_exists` callback.
+
+Do I need to authenticate the client before they can
+access the resource? What authentication mechanisms
+should I provide? This may include form-based, token-based
+(in the URL or a cookie), HTTP basic, HTTP digest,
+SSL certificate or any other form of authentication.
+Implement the `is_authorized` callback.
+
+Do I need fine-grained access control? How do I determine
+that they are authorized access? Handle that in your
+`is_authorized` callback.
+
+Can access to a resource be forbidden regardless of access
+being authorized? A simple example of that is censorship
+of a resource. Implement the `forbidden` callback.
+
+Can access be rate-limited for authenticated users? Use the
+`rate_limited` callback.
+
+Are there any constraints on the length of the resource URI?
+For example, the URI may be used as a key in storage and may
+have a limit in length. Implement `uri_too_long`.
+
+=== Representations
+
+What media types do I provide? If text based, what charsets
+are provided? What languages do I provide?
+
+Implement the mandatory `content_types_provided`. Prefix
+the callbacks with `to_` for clarity. For example, `to_html`
+or `to_text`. For resources that don't implement methods
+GET or HEAD, you must still accept at least one media type,
+but you can leave the callback as `undefined` since it will
+never be called.
+
+Implement the `languages_provided` or `charsets_provided`
+callbacks if applicable.
+
+Does the resource accept ranged requests? If it does,
+implement the `ranges_provided` callback. Resources that
+only accept `bytes` units can use the callback name
+`auto` and let Cowboy automatically do ranged responses.
+Other callbacks should have a name prefix of `ranged_`
+for clarity. For example, `ranged_bytes` or `ranged_pages`.
+If the resource needs to perform additional checks before
+accepting to do a ranged responses, implement the
+`range_satisfiable` callback.
+
+Is there any other header that may make the representation
+of the resource vary? Implement the `variances` callback.
+
+Depending on your choices for caching content, you may
+want to implement one or more of the `generate_etag`,
+`last_modified` and `expires` callbacks.
+
+Do I want the user or user agent to actively choose a
+representation available? Send a list of available
+representations in the response body and implement
+the `multiple_choices` callback.
+
+=== Redirections
+
+Do I need to keep track of what resources were deleted?
+For example, you may have a mechanism where moving a
+resource leaves a redirect link to its new location.
+Implement the `previously_existed` callback.
+
+Was the resource moved, and is the move temporary? If
+it is explicitly temporary, for example due to maintenance,
+implement the `moved_temporarily` callback. Otherwise,
+implement the `moved_permanently` callback.
+
+=== The request
+
+Do you need to read the query string? Individual headers?
+Implement `malformed_request` and do all the parsing and
+validation in this function. Note that the body should not
+be read at this point.
+
+May there be a request body? Will I know its size?
+What's the maximum size of the request body I'm willing
+to accept? Implement `valid_entity_length`.
+
+Finally, take a look at the sections corresponding to the
+methods you are implementing.
+
+=== OPTIONS method
+
+Cowboy by default will send back a list of allowed methods.
+Do I need to add more information to the response? Implement
+the `options` method.
+
+=== GET and HEAD methods
+
+If you implement the methods GET and/or HEAD, you must
+implement one `ProvideCallback` callback for each
+content-type returned by the `content_types_provided`
+callback.
+
+When range requests are accepted, you must implement one
+`RangeCallback` for each range unit returned by
+`ranges_provided` (unless `auto` was used). This is
+in addition to the `ProvideCallback` callback.
+
+=== PUT, POST and PATCH methods
+
+If you implement the methods PUT, POST and/or PATCH,
+you must implement the `content_types_accepted` callback,
+and one `AcceptCallback` callback for each content-type
+it returns. Prefix the `AcceptCallback` callback names
+with `from_` for clarity. For example, `from_html` or
+`from_json`.
+
+Do we want to allow the POST method to create individual
+resources directly through their URI (like PUT)? Implement
+the `allow_missing_post` callback. It is recommended to
+explicitly use PUT in these cases instead.
+
+May there be conflicts when using PUT to create or replace
+a resource? Do we want to make sure that two updates around
+the same time are not cancelling one another? Implement the
+`is_conflict` callback.
+
+=== DELETE methods
+
+If you implement the method DELETE, you must implement
+the `delete_resource` callback.
+
+When `delete_resource` returns, is the resource completely
+removed from the server, including from any caching service?
+If not, and/or if the deletion is asynchronous and we have
+no way of knowing it has been completed yet, implement the
+`delete_completed` callback.
diff --git a/docs/en/cowboy/2.13/guide/resource_design/index.html b/docs/en/cowboy/2.13/guide/resource_design/index.html
new file mode 100644
index 00000000..6edfd7f6
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/resource_design/index.html
@@ -0,0 +1,246 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
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+
+    <title>Nine Nines: Designing a resource handler</title>
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+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Designing a resource handler</span></h1>
+
+<p>This chapter aims to provide you with a list of questions you must answer in order to write a good resource handler. It is meant to be usable as a step by step guide.</p>
+<h2 id="_the_service">The service</h2>
+<p>Can the service become unavailable, and when it does, can we detect it? For example, database connectivity problems may be detected early. We may also have planned outages of all or parts of the system. Implement the <code>service_available</code> callback.</p>
+<p>What HTTP methods does the service implement? Do we need more than the standard OPTIONS, HEAD, GET, PUT, POST, PATCH and DELETE? Are we not using one of those at all? Implement the <code>known_methods</code> callback.</p>
+<h2 id="_type_of_resource_handler">Type of resource handler</h2>
+<p>Am I writing a handler for a collection of resources, or for a single resource?</p>
+<p>The semantics for each of these are quite different. You should not mix collection and single resource in the same handler.</p>
+<h2 id="_collection_handler">Collection handler</h2>
+<p>Skip this section if you are not doing a collection.</p>
+<p>Is the collection hardcoded or dynamic? For example, if you use the route <code>/users</code> for the collection of users then the collection is hardcoded; if you use <code>/forums/:category</code> for the collection of threads then it isn&apos;t. When the collection is hardcoded you can safely assume the resource always exists.</p>
+<p>What methods should I implement?</p>
+<p>OPTIONS is used to get some information about the collection. It is recommended to allow it even if you do not implement it, as Cowboy has a default implementation built-in.</p>
+<p>HEAD and GET are used to retrieve the collection. If you allow GET, also allow HEAD as there&apos;s no extra work required to make it work.</p>
+<p>POST is used to create a new resource inside the collection. Creating a resource by using POST on the collection is useful when resources may be created before knowing their URI, usually because parts of it are generated dynamically. A common case is some kind of auto incremented integer identifier.</p>
+<p>The next methods are more rarely allowed.</p>
+<p>PUT is used to create a new collection (when the collection isn&apos;t hardcoded), or replace the entire collection.</p>
+<p>DELETE is used to delete the entire collection.</p>
+<p>PATCH is used to modify the collection using instructions given in the request body. A PATCH operation is atomic. The PATCH operation may be used for such things as reordering; adding, modifying or deleting parts of the collection.</p>
+<h2 id="_single_resource_handler">Single resource handler</h2>
+<p>Skip this section if you are doing a collection.</p>
+<p>What methods should I implement?</p>
+<p>OPTIONS is used to get some information about the resource. It is recommended to allow it even if you do not implement it, as Cowboy has a default implementation built-in.</p>
+<p>HEAD and GET are used to retrieve the resource. If you allow GET, also allow HEAD as there&apos;s no extra work required to make it work.</p>
+<p>POST is used to update the resource.</p>
+<p>PUT is used to create a new resource (when it doesn&apos;t already exist) or replace the resource.</p>
+<p>DELETE is used to delete the resource.</p>
+<p>PATCH is used to modify the resource using instructions given in the request body. A PATCH operation is atomic. The PATCH operation may be used for adding, removing or modifying specific values in the resource.</p>
+<h2 id="_the_resource">The resource</h2>
+<p>Following the above discussion, implement the <code>allowed_methods</code> callback.</p>
+<p>Does the resource always exist? If it may not, implement the <code>resource_exists</code> callback.</p>
+<p>Do I need to authenticate the client before they can access the resource? What authentication mechanisms should I provide? This may include form-based, token-based (in the URL or a cookie), HTTP basic, HTTP digest, SSL certificate or any other form of authentication. Implement the <code>is_authorized</code> callback.</p>
+<p>Do I need fine-grained access control? How do I determine that they are authorized access? Handle that in your <code>is_authorized</code> callback.</p>
+<p>Can access to a resource be forbidden regardless of access being authorized? A simple example of that is censorship of a resource. Implement the <code>forbidden</code> callback.</p>
+<p>Can access be rate-limited for authenticated users? Use the <code>rate_limited</code> callback.</p>
+<p>Are there any constraints on the length of the resource URI? For example, the URI may be used as a key in storage and may have a limit in length. Implement <code>uri_too_long</code>.</p>
+<h2 id="_representations">Representations</h2>
+<p>What media types do I provide? If text based, what charsets are provided? What languages do I provide?</p>
+<p>Implement the mandatory <code>content_types_provided</code>. Prefix the callbacks with <code>to_</code> for clarity. For example, <code>to_html</code> or <code>to_text</code>. For resources that don&apos;t implement methods GET or HEAD, you must still accept at least one media type, but you can leave the callback as <code>undefined</code> since it will never be called.</p>
+<p>Implement the <code>languages_provided</code> or <code>charsets_provided</code> callbacks if applicable.</p>
+<p>Does the resource accept ranged requests? If it does, implement the <code>ranges_provided</code> callback. Resources that only accept <code>bytes</code> units can use the callback name <code>auto</code> and let Cowboy automatically do ranged responses. Other callbacks should have a name prefix of <code>ranged_</code> for clarity. For example, <code>ranged_bytes</code> or <code>ranged_pages</code>. If the resource needs to perform additional checks before accepting to do a ranged responses, implement the <code>range_satisfiable</code> callback.</p>
+<p>Is there any other header that may make the representation of the resource vary? Implement the <code>variances</code> callback.</p>
+<p>Depending on your choices for caching content, you may want to implement one or more of the <code>generate_etag</code>, <code>last_modified</code> and <code>expires</code> callbacks.</p>
+<p>Do I want the user or user agent to actively choose a representation available? Send a list of available representations in the response body and implement the <code>multiple_choices</code> callback.</p>
+<h2 id="_redirections">Redirections</h2>
+<p>Do I need to keep track of what resources were deleted? For example, you may have a mechanism where moving a resource leaves a redirect link to its new location. Implement the <code>previously_existed</code> callback.</p>
+<p>Was the resource moved, and is the move temporary? If it is explicitly temporary, for example due to maintenance, implement the <code>moved_temporarily</code> callback. Otherwise, implement the <code>moved_permanently</code> callback.</p>
+<h2 id="_the_request">The request</h2>
+<p>Do you need to read the query string? Individual headers? Implement <code>malformed_request</code> and do all the parsing and validation in this function. Note that the body should not be read at this point.</p>
+<p>May there be a request body? Will I know its size? What&apos;s the maximum size of the request body I&apos;m willing to accept? Implement <code>valid_entity_length</code>.</p>
+<p>Finally, take a look at the sections corresponding to the methods you are implementing.</p>
+<h2 id="_options_method">OPTIONS method</h2>
+<p>Cowboy by default will send back a list of allowed methods. Do I need to add more information to the response? Implement the <code>options</code> method.</p>
+<h2 id="_get_and_head_methods">GET and HEAD methods</h2>
+<p>If you implement the methods GET and/or HEAD, you must implement one <code>ProvideCallback</code> callback for each content-type returned by the <code>content_types_provided</code> callback.</p>
+<p>When range requests are accepted, you must implement one <code>RangeCallback</code> for each range unit returned by <code>ranges_provided</code> (unless <code>auto</code> was used). This is in addition to the <code>ProvideCallback</code> callback.</p>
+<h2 id="_put__post_and_patch_methods">PUT, POST and PATCH methods</h2>
+<p>If you implement the methods PUT, POST and/or PATCH, you must implement the <code>content_types_accepted</code> callback, and one <code>AcceptCallback</code> callback for each content-type it returns. Prefix the <code>AcceptCallback</code> callback names with <code>from_</code> for clarity. For example, <code>from_html</code> or <code>from_json</code>.</p>
+<p>Do we want to allow the POST method to create individual resources directly through their URI (like PUT)? Implement the <code>allow_missing_post</code> callback. It is recommended to explicitly use PUT in these cases instead.</p>
+<p>May there be conflicts when using PUT to create or replace a resource? Do we want to make sure that two updates around the same time are not cancelling one another? Implement the <code>is_conflict</code> callback.</p>
+<h2 id="_delete_methods">DELETE methods</h2>
+<p>If you implement the method DELETE, you must implement the <code>delete_resource</code> callback.</p>
+<p>When <code>delete_resource</code> returns, is the resource completely removed from the server, including from any caching service? If not, and/or if the deletion is asynchronous and we have no way of knowing it has been completed yet, implement the <code>delete_completed</code> callback.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_flowcharts/">
+					REST flowcharts
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_protocol/">
+					The Websocket protocol
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/guide/resp.asciidoc b/docs/en/cowboy/2.13/guide/resp.asciidoc
new file mode 100644
index 00000000..1664aefc
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/resp.asciidoc
@@ -0,0 +1,368 @@
+[[resp]]
+== Sending a response
+
+The response must be sent using the Req object.
+
+Cowboy provides two different ways of sending responses:
+either directly or by streaming the body. Response headers
+and body may be set in advance. The response is sent as
+soon as one of the reply or stream reply function is
+called.
+
+Cowboy also provides a simplified interface for sending
+files. It can also send only specific parts of a file.
+
+While only one response is allowed for every request,
+HTTP/2 introduced a mechanism that allows the server
+to push additional resources related to the response.
+This chapter also describes how this feature works in
+Cowboy.
+
+=== Reply
+
+Cowboy provides three functions for sending the entire reply,
+depending on whether you need to set headers and body. In all
+cases, Cowboy will add any headers required by the protocol
+(for example the date header will always be sent).
+
+When you need to set only the status code,
+use `cowboy_req:reply/2`:
+
+[source,erlang]
+Req = cowboy_req:reply(200, Req0).
+
+When you need to set response headers at the same time,
+use `cowboy_req:reply/3`:
+
+[source,erlang]
+----
+Req = cowboy_req:reply(303, #{
+    <<"location">> => <<"https://ninenines.eu">>
+}, Req0).
+----
+
+Note that the header name must always be a lowercase
+binary.
+
+When you also need to set the response body,
+use `cowboy_req:reply/4`:
+
+[source,erlang]
+----
+Req = cowboy_req:reply(200, #{
+    <<"content-type">> => <<"text/plain">>
+}, "Hello world!", Req0).
+----
+
+You should always set the content-type header when the
+response has a body. There is however no need to set
+the content-length header; Cowboy does it automatically.
+
+The response body and the header values must be either
+a binary or an iolist. An iolist is a list containing
+binaries, characters, strings or other iolists. This
+allows you to build a response from different parts
+without having to do any concatenation:
+
+[source,erlang]
+----
+Title = "Hello world!",
+Body = <<"Hats off!">>,
+Req = cowboy_req:reply(200, #{
+    <<"content-type">> => <<"text/html">>
+}, ["<html><head><title>", Title, "</title></head>",
+    "<body><p>", Body, "</p></body></html>"], Req0).
+----
+
+This method of building responses is more efficient than
+concatenating. Behind the scenes, each element of the list
+is simply a pointer, and those pointers are used directly
+when writing to the socket.
+
+=== Stream reply
+
+Cowboy provides two functions for initiating a response,
+and an additional function for streaming the response body.
+Cowboy will add any required headers to the response.
+
+// @todo For HTTP/1.1 Cowboy should probably not use chunked transfer-encoding if the content-length is set.
+
+When you need to set only the status code,
+use `cowboy_req:stream_reply/2`:
+
+[source,erlang]
+----
+Req = cowboy_req:stream_reply(200, Req0),
+
+cowboy_req:stream_body("Hello...", nofin, Req),
+cowboy_req:stream_body("chunked...", nofin, Req),
+cowboy_req:stream_body("world!!", fin, Req).
+----
+
+The second argument to `cowboy_req:stream_body/3` indicates
+whether this data terminates the body. Use `fin` for the
+final flag, and `nofin` otherwise.
+
+This snippet does not set a content-type header. This is
+not recommended. All responses with a body should have
+a content-type. The header can be set beforehand, or
+using the `cowboy_req:stream_reply/3`:
+
+[source,erlang]
+----
+Req = cowboy_req:stream_reply(200, #{
+    <<"content-type">> => <<"text/html">>
+}, Req0),
+
+cowboy_req:stream_body("<html><head>Hello world!</head>", nofin, Req),
+cowboy_req:stream_body("<body><p>Hats off!</p></body></html>", fin, Req).
+----
+
+HTTP provides a few different ways to stream response bodies.
+Cowboy will select the most appropriate one based on the HTTP
+version and the request and response headers.
+
+While not required by any means, it is recommended that you
+set the content-length header in the response if you know it
+in advance. This will ensure that the best response method
+is selected and help clients understand when the response
+is fully received.
+
+Cowboy also provides a function to send response trailers.
+Response trailers are semantically equivalent to the headers
+you send in the response, only they are sent at the end.
+This is especially useful to attach information to the
+response that could not be generated until the response
+body was fully generated.
+
+Trailer fields must be listed in the trailer header. Any
+field not listed might be dropped by the client or an intermediary.
+
+[source,erlang]
+----
+Req = cowboy_req:stream_reply(200, #{
+    <<"content-type">> => <<"text/html">>,
+    <<"trailer">> => <<"expires, content-md5">>
+}, Req0),
+
+cowboy_req:stream_body("<html><head>Hello world!</head>", nofin, Req),
+cowboy_req:stream_body("<body><p>Hats off!</p></body></html>", nofin, Req),
+
+cowboy_req:stream_trailers(#{
+    <<"expires">> => <<"Sun, 10 Dec 2017 19:13:47 GMT">>,
+    <<"content-md5">> => <<"c6081d20ff41a42ce17048ed1c0345e2">>
+}, Req).
+----
+
+The stream ends with trailers. It is no longer possible to
+send data after sending trailers. You cannot send trailers
+after setting the `fin` flag when streaming the body.
+
+=== Preset response headers
+
+Cowboy provides functions to set response headers without
+immediately sending them. They are stored in the Req object
+and sent as part of the response when a reply function is
+called.
+
+To set response headers:
+
+[source,erlang]
+Req = cowboy_req:set_resp_header(<<"allow">>, "GET", Req0).
+
+Header names must be a lowercase binary.
+
+Do not use this function for setting cookies. Refer to
+the xref:cookies[Cookies] chapter for more information.
+
+To check if a response header has already been set:
+
+[source,erlang]
+cowboy_req:has_resp_header(<<"allow">>, Req).
+
+It returns `true` if the header was set, `false` otherwise.
+
+To delete a response header that was set previously:
+
+[source,erlang]
+Req = cowboy_req:delete_resp_header(<<"allow">>, Req0).
+
+=== Overriding headers
+
+As Cowboy provides different ways of setting response
+headers and body, clashes may occur, so it's important
+to understand what happens when a header is set twice.
+
+Headers come from five different origins:
+
+* Protocol-specific headers (for example HTTP/1.1's connection header)
+* Other required headers (for example the date header)
+* Preset headers
+* Headers given to the reply function
+* Set-cookie headers
+
+Cowboy does not allow overriding protocol-specific headers.
+
+Set-cookie headers will always be appended at the end of
+the list of headers before sending the response.
+
+Headers given to the reply function will always override
+preset headers and required headers. If a header is found
+in two or three of these, then the one in the reply function
+is picked and the others are dropped.
+
+Similarly, preset headers will always override required
+headers.
+
+To illustrate, look at the following snippet. Cowboy by
+default sends the server header with the value "Cowboy".
+We can override it:
+
+[source,erlang]
+----
+Req = cowboy_req:reply(200, #{
+    <<"server">> => <<"yaws">>
+}, Req0).
+----
+
+=== Preset response body
+
+Cowboy provides functions to set the response body without
+immediately sending it. It is stored in the Req object and
+sent when the reply function is called.
+
+To set the response body:
+
+[source,erlang]
+Req = cowboy_req:set_resp_body("Hello world!", Req0).
+
+// @todo Yeah we probably should add that function that
+// also sets the content-type at the same time...
+
+To check if a response body has already been set:
+
+[source,erlang]
+cowboy_req:has_resp_body(Req).
+
+It returns `true` if the body was set and is non-empty,
+`false` otherwise.
+
+// @todo We probably should also have a function that
+// properly removes the response body, including any
+// content-* headers.
+
+The preset response body is only sent if the reply function
+used is `cowboy_req:reply/2` or `cowboy_req:reply/3`.
+
+=== Sending files
+
+Cowboy provides a shortcut for sending files. When
+using `cowboy_req:reply/4`, or when presetting the
+response header, you can give a `sendfile` tuple to
+Cowboy:
+
+[source,erlang]
+{sendfile, Offset, Length, Filename}
+
+Depending on the values for `Offset` or `Length`, the
+entire file may be sent, or just a part of it.
+
+The length is required even for sending the entire file.
+Cowboy sends it in the content-length header.
+
+To send a file while replying:
+
+[source,erlang]
+----
+Req = cowboy_req:reply(200, #{
+    <<"content-type">> => "image/png"
+}, {sendfile, 0, 12345, "path/to/logo.png"}, Req0).
+----
+
+// @todo An example of presetting a file would be useful,
+// but let's wait for the function that can set the
+// content-type at the same time.
+
+// @todo What about streaming many files? For example
+// it should be possible to build a tar file on the fly
+// while still using sendfile. Another example could be
+// proper support for multipart byte ranges. Yet another
+// example would be automatic concatenation of CSS or JS
+// files.
+
+=== Informational responses
+
+Cowboy allows you to send informational responses.
+
+Informational responses are responses that have a status
+code between 100 and 199. Any number can be sent before
+the proper response. Sending an informational response
+does not change the behavior of the proper response, and
+clients are expected to ignore any informational response
+they do not understand.
+
+The following snippet sends a 103 informational response
+with some headers that are expected to be in the final
+response.
+
+[source,erlang]
+----
+Req = cowboy_req:inform(103, #{
+    <<"link">> => <<"</style.css>; rel=preload; as=style, </script.js>; rel=preload; as=script">>
+}, Req0).
+----
+
+=== Push
+
+The HTTP/2 protocol introduced the ability to push resources
+related to the one sent in the response. Cowboy provides two
+functions for that purpose: `cowboy_req:push/3,4`.
+
+Push is only available for HTTP/2. Cowboy will automatically
+ignore push requests if the protocol doesn't support it.
+
+The push function must be called before any of the reply
+functions. Doing otherwise will result in a crash.
+
+To push a resource, you need to provide the same information
+as a client performing a request would. This includes the
+HTTP method, the URI and any necessary request headers.
+
+Cowboy by default only requires you to give the path to
+the resource and the request headers. The rest of the URI
+is taken from the current request (excluding the query
+string, set to empty) and the method is GET by default.
+
+The following snippet pushes a CSS file that is linked to
+in the response:
+
+[source,erlang]
+----
+cowboy_req:push("/static/style.css", #{
+    <<"accept">> => <<"text/css">>
+}, Req0),
+Req = cowboy_req:reply(200, #{
+    <<"content-type">> => <<"text/html">>
+}, ["<html><head><title>My web page</title>",
+    "<link rel='stylesheet' type='text/css' href='/static/style.css'>",
+    "<body><p>Welcome to Erlang!</p></body></html>"], Req0).
+----
+
+To override the method, scheme, host, port or query string,
+simply pass in a fourth argument. The following snippet
+uses a different host name:
+
+[source,erlang]
+----
+cowboy_req:push("/static/style.css", #{
+    <<"accept">> => <<"text/css">>
+}, #{host => <<"cdn.example.org">>}, Req),
+----
+
+Pushed resources don't have to be files. As long as the push
+request is cacheable, safe and does not include a body, the
+resource can be pushed.
+
+Under the hood, Cowboy handles pushed requests the same as
+normal requests: a different process is created which will
+ultimately send a response to the client.
diff --git a/docs/en/cowboy/2.13/guide/resp/index.html b/docs/en/cowboy/2.13/guide/resp/index.html
new file mode 100644
index 00000000..24a11846
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/resp/index.html
@@ -0,0 +1,426 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: Sending a response</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
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+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Sending a response</span></h1>
+
+<p>The response must be sent using the Req object.</p>
+<p>Cowboy provides two different ways of sending responses: either directly or by streaming the body. Response headers and body may be set in advance. The response is sent as soon as one of the reply or stream reply function is called.</p>
+<p>Cowboy also provides a simplified interface for sending files. It can also send only specific parts of a file.</p>
+<p>While only one response is allowed for every request, HTTP/2 introduced a mechanism that allows the server to push additional resources related to the response. This chapter also describes how this feature works in Cowboy.</p>
+<h2 id="_reply">Reply</h2>
+<p>Cowboy provides three functions for sending the entire reply, depending on whether you need to set headers and body. In all cases, Cowboy will add any headers required by the protocol (for example the date header will always be sent).</p>
+<p>When you need to set only the status code, use <code>cowboy_req:reply/2</code>:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>When you need to set response headers at the same time, use <code>cowboy_req:reply/3</code>:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">303</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"location"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"https://ninenines.eu"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Note that the header name must always be a lowercase binary.</p>
+<p>When you also need to set the response body, use <code>cowboy_req:reply/4</code>:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#FF0000">"Hello world!"</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>You should always set the content-type header when the response has a body. There is however no need to set the content-length header; Cowboy does it automatically.</p>
+<p>The response body and the header values must be either a binary or an iolist. An iolist is a list containing binaries, characters, strings or other iolists. This allows you to build a response from different parts without having to do any concatenation:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Title</font> <font color="#990000">=</font> <font color="#FF0000">"Hello world!"</font>,
+<font color="#009900">Body</font> <font color="#990000">=</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hats off!"</font><font color="#990000">&gt;&gt;</font>,
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html"</font><font color="#990000">&gt;&gt;</font>
+}, [<font color="#FF0000">"&lt;html&gt;&lt;head&gt;&lt;title&gt;"</font>, <font color="#009900">Title</font>, <font color="#FF0000">"&lt;/title&gt;&lt;/head&gt;"</font>,
+    <font color="#FF0000">"&lt;body&gt;&lt;p&gt;"</font>, <font color="#009900">Body</font>, <font color="#FF0000">"&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;"</font>], <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>This method of building responses is more efficient than concatenating. Behind the scenes, each element of the list is simply a pointer, and those pointers are used directly when writing to the socket.</p>
+<h2 id="_stream_reply">Stream reply</h2>
+<p>Cowboy provides two functions for initiating a response, and an additional function for streaming the response body. Cowboy will add any required headers to the response.</p>
+<!-- @todo For HTTP/1.1 Cowboy should probably not use chunked transfer-encoding if the content-length is set.-->
+<p>When you need to set only the status code, use <code>cowboy_req:stream_reply/2</code>:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, <font color="#009900">Req0</font>),
+
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#FF0000">"Hello..."</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#FF0000">"chunked..."</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#FF0000">"world!!"</font>, <font color="#FF6600">fin</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The second argument to <code>cowboy_req:stream_body/3</code> indicates whether this data terminates the body. Use <code>fin</code> for the final flag, and <code>nofin</code> otherwise.</p>
+<p>This snippet does not set a content-type header. This is not recommended. All responses with a body should have a content-type. The header can be set beforehand, or using the <code>cowboy_req:stream_reply/3</code>:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>),
+
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#FF0000">"&lt;html&gt;&lt;head&gt;Hello world!&lt;/head&gt;"</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#FF0000">"&lt;body&gt;&lt;p&gt;Hats off!&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;"</font>, <font color="#FF6600">fin</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>HTTP provides a few different ways to stream response bodies. Cowboy will select the most appropriate one based on the HTTP version and the request and response headers.</p>
+<p>While not required by any means, it is recommended that you set the content-length header in the response if you know it in advance. This will ensure that the best response method is selected and help clients understand when the response is fully received.</p>
+<p>Cowboy also provides a function to send response trailers. Response trailers are semantically equivalent to the headers you send in the response, only they are sent at the end. This is especially useful to attach information to the response that could not be generated until the response body was fully generated.</p>
+<p>Trailer fields must be listed in the trailer header. Any field not listed might be dropped by the client or an intermediary.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"trailer"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"expires, content-md5"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>),
+
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#FF0000">"&lt;html&gt;&lt;head&gt;Hello world!&lt;/head&gt;"</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#FF0000">"&lt;body&gt;&lt;p&gt;Hats off!&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;"</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+
+<b><font color="#000000">cowboy_req:stream_trailers</font></b>(#{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"expires"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Sun, 10 Dec 2017 19:13:47 GMT"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-md5"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"c6081d20ff41a42ce17048ed1c0345e2"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The stream ends with trailers. It is no longer possible to send data after sending trailers. You cannot send trailers after setting the <code>fin</code> flag when streaming the body.</p>
+<h2 id="_preset_response_headers">Preset response headers</h2>
+<p>Cowboy provides functions to set response headers without immediately sending them. They are stored in the Req object and sent as part of the response when a reply function is called.</p>
+<p>To set response headers:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"allow"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF0000">"GET"</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Header names must be a lowercase binary.</p>
+<p>Do not use this function for setting cookies. Refer to the <a href="../cookies">Cookies</a> chapter for more information.</p>
+<p>To check if a response header has already been set:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:has_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"allow"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>It returns <code>true</code> if the header was set, <code>false</code> otherwise.</p>
+<p>To delete a response header that was set previously:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:delete_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"allow"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_overriding_headers">Overriding headers</h2>
+<p>As Cowboy provides different ways of setting response headers and body, clashes may occur, so it&apos;s important to understand what happens when a header is set twice.</p>
+<p>Headers come from five different origins:</p>
+<ul><li>Protocol-specific headers (for example HTTP/1.1&apos;s connection header)
+</li>
+<li>Other required headers (for example the date header)
+</li>
+<li>Preset headers
+</li>
+<li>Headers given to the reply function
+</li>
+<li>Set-cookie headers
+</li>
+</ul>
+<p>Cowboy does not allow overriding protocol-specific headers.</p>
+<p>Set-cookie headers will always be appended at the end of the list of headers before sending the response.</p>
+<p>Headers given to the reply function will always override preset headers and required headers. If a header is found in two or three of these, then the one in the reply function is picked and the others are dropped.</p>
+<p>Similarly, preset headers will always override required headers.</p>
+<p>To illustrate, look at the following snippet. Cowboy by default sends the server header with the value &quot;Cowboy&quot;. We can override it:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"server"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"yaws"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_preset_response_body">Preset response body</h2>
+<p>Cowboy provides functions to set the response body without immediately sending it. It is stored in the Req object and sent when the reply function is called.</p>
+<p>To set the response body:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_body</font></b>(<font color="#FF0000">"Hello world!"</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<!-- @todo Yeah we probably should add that function that-->
+<!-- also sets the content-type at the same time...-->
+<p>To check if a response body has already been set:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:has_resp_body</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>It returns <code>true</code> if the body was set and is non-empty, <code>false</code> otherwise.</p>
+<!-- @todo We probably should also have a function that-->
+<!-- properly removes the response body, including any-->
+<!-- content-* headers.-->
+<p>The preset response body is only sent if the reply function used is <code>cowboy_req:reply/2</code> or <code>cowboy_req:reply/3</code>.</p>
+<h2 id="_sending_files">Sending files</h2>
+<p>Cowboy provides a shortcut for sending files. When using <code>cowboy_req:reply/4</code>, or when presetting the response header, you can give a <code>sendfile</code> tuple to Cowboy:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">sendfile</font>, <font color="#009900">Offset</font>, <font color="#009900">Length</font>, <font color="#009900">Filename</font>}</tt></pre>
+</div></div>
+<p>Depending on the values for <code>Offset</code> or <code>Length</code>, the entire file may be sent, or just a part of it.</p>
+<p>The length is required even for sending the entire file. Cowboy sends it in the content-length header.</p>
+<p>To send a file while replying:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"image/png"</font>
+}, {<font color="#FF6600">sendfile</font>, <font color="#993399">0</font>, <font color="#993399">12345</font>, <font color="#FF0000">"path/to/logo.png"</font>}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<!-- @todo An example of presetting a file would be useful,-->
+<!-- but let&apos;s wait for the function that can set the-->
+<!-- content-type at the same time.-->
+<!-- @todo What about streaming many files? For example-->
+<!-- it should be possible to build a tar file on the fly-->
+<!-- while still using sendfile. Another example could be-->
+<!-- proper support for multipart byte ranges. Yet another-->
+<!-- example would be automatic concatenation of CSS or JS-->
+<!-- files.-->
+<h2 id="_informational_responses">Informational responses</h2>
+<p>Cowboy allows you to send informational responses.</p>
+<p>Informational responses are responses that have a status code between 100 and 199. Any number can be sent before the proper response. Sending an informational response does not change the behavior of the proper response, and clients are expected to ignore any informational response they do not understand.</p>
+<p>The following snippet sends a 103 informational response with some headers that are expected to be in the final response.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:inform</font></b>(<font color="#993399">103</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"link"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"&lt;/style.css&gt;; rel=preload; as=style, &lt;/script.js&gt;; rel=preload; as=script"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_push">Push</h2>
+<p>The HTTP/2 protocol introduced the ability to push resources related to the one sent in the response. Cowboy provides two functions for that purpose: <code>cowboy_req:push/3,4</code>.</p>
+<p>Push is only available for HTTP/2. Cowboy will automatically ignore push requests if the protocol doesn&apos;t support it.</p>
+<p>The push function must be called before any of the reply functions. Doing otherwise will result in a crash.</p>
+<p>To push a resource, you need to provide the same information as a client performing a request would. This includes the HTTP method, the URI and any necessary request headers.</p>
+<p>Cowboy by default only requires you to give the path to the resource and the request headers. The rest of the URI is taken from the current request (excluding the query string, set to empty) and the method is GET by default.</p>
+<p>The following snippet pushes a CSS file that is linked to in the response:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:push</font></b>(<font color="#FF0000">"/static/style.css"</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/css"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html"</font><font color="#990000">&gt;&gt;</font>
+}, [<font color="#FF0000">"&lt;html&gt;&lt;head&gt;&lt;title&gt;My web page&lt;/title&gt;"</font>,
+    <font color="#FF0000">"&lt;link rel='stylesheet' type='text/css' href='/static/style.css'&gt;"</font>,
+    <font color="#FF0000">"&lt;body&gt;&lt;p&gt;Welcome to Erlang!&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;"</font>], <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>To override the method, scheme, host, port or query string, simply pass in a fourth argument. The following snippet uses a different host name:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:push</font></b>(<font color="#FF0000">"/static/style.css"</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/css"</font><font color="#990000">&gt;&gt;</font>
+}, #{<font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"cdn.example.org"</font><font color="#990000">&gt;&gt;</font>}, <font color="#009900">Req</font>),</tt></pre>
+</div></div>
+<p>Pushed resources don&apos;t have to be files. As long as the push request is cacheable, safe and does not include a body, the resource can be pushed.</p>
+<p>Under the hood, Cowboy handles pushed requests the same as normal requests: a different process is created which will ultimately send a response to the client.</p>
+
+
+
+
+	
+		
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+		
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+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/req_body/">
+					Reading the request body
+				</a>
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+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/cookies/">
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+</div>
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+<div class="span3 sidecol">
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+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/guide/rest_flowcharts.asciidoc b/docs/en/cowboy/2.13/guide/rest_flowcharts.asciidoc
new file mode 100644
index 00000000..b8d0e0d5
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/rest_flowcharts.asciidoc
@@ -0,0 +1,261 @@
+[[rest_flowcharts]]
+== REST flowcharts
+
+This chapter will explain the REST handler state machine through
+a number of different diagrams.
+
+There are four main paths that requests may follow. One for the
+method OPTIONS; one for the methods GET and HEAD; one for the
+methods PUT, POST and PATCH; and one for the method DELETE.
+
+All paths start with the "Start" diagram, and all paths excluding
+the OPTIONS path go through the "Content negotiation" diagram
+and optionally the "Conditional requests" diagram if the resource
+exists.
+
+The red squares refer to another diagram. The light green squares
+indicate a response. Other squares may be either a callback or a
+question answered by Cowboy itself. Green arrows tend to indicate
+the default behavior if the callback is undefined. The star next
+to values indicate that the value is descriptive rather than exact.
+
+=== Start
+
+All requests start from here.
+
+image::rest_start.png[REST starting flowchart]
+
+A series of callbacks are called in succession to perform
+a general checkup of the service, the request line and
+request headers.
+
+The request body, if any, is not expected to have been
+received for any of these steps. It is only processed
+at the end of the "PUT, POST and PATCH methods" diagram,
+when all conditions have been met.
+
+The `known_methods` and `allowed_methods` callbacks
+return a list of methods. Cowboy then checks if the request
+method is in the list, and stops otherwise.
+
+The `is_authorized` callback may be used to check that
+access to the resource is authorized. Authentication
+may also be performed as needed. When authorization is
+denied, the return value from the callback must include
+a challenge applicable to the requested resource, which
+will be sent back to the client in the www-authenticate
+header.
+
+This diagram is immediately followed by either the
+"OPTIONS method" diagram when the request method is
+OPTIONS, or the "Content negotiation" diagram otherwise.
+
+=== OPTIONS method
+
+This diagram only applies to OPTIONS requests.
+
+image::rest_options.png[REST OPTIONS method flowchart]
+
+The `options` callback may be used to add information
+about the resource, such as media types or languages
+provided; allowed methods; any extra information. A
+response body may also be set, although clients should
+not be expected to read it.
+
+If the `options` callback is not defined, Cowboy will
+send a response containing the list of allowed methods
+by default.
+
+=== Content negotiation
+
+This diagram applies to all request methods other than
+OPTIONS. It is executed right after the "Start" diagram
+is completed.
+
+image::rest_conneg.png[REST content negotiation flowchart]
+
+The purpose of these steps is to determine an appropriate
+representation to be sent back to the client.
+
+The request may contain any of the accept header; the
+accept-language header; or the accept-charset header.
+When present, Cowboy will parse the headers and then
+call the corresponding callback to obtain the list
+of provided content-type, language or charset for this
+resource. It then automatically select the best match
+based on the request.
+
+If a callback is not defined, Cowboy will select the
+content-type, language or charset that the client
+prefers.
+
+The `content_types_provided` also returns the name of
+a callback for every content-type it accepts. This
+callback will only be called at the end of the
+"GET and HEAD methods" diagram, when all conditions
+have been met.
+
+Optionally, the `ranges_provided` also returns the
+name of a callback for every range unit it accepts. This
+will be called at the end of the "GET and HEAD methods"
+diagram in the case of ranged requests.
+
+The selected content-type, language and charset are
+saved as meta values in the Req object. You *should*
+use the appropriate representation if you set a
+response body manually (alongside an error code,
+for example).
+
+This diagram is immediately followed by
+the "GET and HEAD methods" diagram,
+the "PUT, POST and PATCH methods" diagram,
+or the "DELETE method" diagram, depending on the
+method.
+
+=== GET and HEAD methods
+
+This diagram only applies to GET and HEAD requests.
+
+For a description of the `cond` step, please see
+the "Conditional requests" diagram.
+
+image::rest_get_head.png[REST GET/HEAD methods flowchart]
+
+When the resource exists, and the conditional steps
+succeed, the resource can be retrieved.
+
+Cowboy prepares the response by first retrieving
+metadata about the representation, then by calling
+the `ProvideCallback` callback. This is the callback
+you defined for each content-types you returned from
+`content_types_provided`. This callback returns the body
+that will be sent back to the client.
+
+For ranged requests, but only when the `ranges_provided`
+callback was defined earlier, Cowboy will add the selected
+`range` information to the Req object and call the
+`range_satisfiable` callback. After confirming that the
+range can be provided, Cowboy calls the `RangeResource`
+callback and produces a ranged response using the
+ranged data from the callback.
+
+When the resource does not exist, Cowboy will figure out
+whether the resource existed previously, and if so whether
+it was moved elsewhere in order to redirect the client to
+the new URI.
+
+The `moved_permanently` and `moved_temporarily` callbacks
+must return the new location of the resource if it was in
+fact moved.
+
+=== PUT, POST and PATCH methods
+
+This diagram only applies to PUT, POST and PATCH requests.
+
+For a description of the `cond` step, please see
+the "Conditional requests" diagram.
+
+image::rest_put_post_patch.png[REST PUT/POST/PATCH methods flowchart]
+
+When the resource exists, first the conditional steps
+are executed. When that succeeds, and the method is PUT,
+Cowboy will call the `is_conflict` callback. This function
+can be used to prevent potential race conditions, by locking
+the resource for example.
+
+Then all three methods reach the `content_types_accepted`
+step that we will describe in a few paragraphs.
+
+When the resource does not exist, and the method is PUT,
+Cowboy will check for conflicts and then move on to the
+`content_types_accepted` step. For other methods, Cowboy
+will figure out whether the resource existed previously,
+and if so whether it was moved elsewhere. If the resource
+is truly non-existent, the method is POST and the call
+for `allow_missing_post` returns `true`, then Cowboy will
+move on to the `content_types_accepted` step. Otherwise
+the request processing ends there.
+
+The `moved_permanently` and `moved_temporarily` callbacks
+must return the new location of the resource if it was in
+fact moved.
+
+The `content_types_accepted` returns a list of
+content-types it accepts, but also the name of a callback
+for each of them. Cowboy will select the appropriate
+callback for processing the request body and call it.
+
+This callback may return one of three different return
+values.
+
+If an error occurred while processing the request body,
+it must return `false` and Cowboy will send an
+appropriate error response.
+
+If the method is POST, then you may return `true` with
+an URI of where the resource has been created. This is
+especially useful for writing handlers for collections.
+
+Otherwise, return `true` to indicate success. Cowboy
+will select the appropriate response to be sent depending
+on whether a resource has been created, rather than
+modified, and on the availability of a location header
+or a body in the response.
+
+=== DELETE method
+
+This diagram only applies to DELETE requests.
+
+For a description of the `cond` step, please see
+the "Conditional requests" diagram.
+
+image::rest_delete.png[REST DELETE method flowchart]
+
+When the resource exists, and the conditional steps
+succeed, the resource can be deleted.
+
+Deleting the resource is a two steps process. First
+the callback `delete_resource` is executed. Use this
+callback to delete the resource.
+
+Because the resource may be cached, you must also
+delete all cached representations of this resource
+in the system. This operation may take a while though,
+so you may return before it finished.
+
+Cowboy will then call the `delete_completed` callback.
+If you know that the resource has been completely
+deleted from your system, including from caches, then
+you can return `true`. If any doubts persist, return
+`false`. Cowboy will assume `true` by default.
+
+To finish, Cowboy checks if you set a response body,
+and depending on that, sends the appropriate response.
+
+When the resource does not exist, Cowboy will figure out
+whether the resource existed previously, and if so whether
+it was moved elsewhere in order to redirect the client to
+the new URI.
+
+The `moved_permanently` and `moved_temporarily` callbacks
+must return the new location of the resource if it was in
+fact moved.
+
+=== Conditional requests
+
+This diagram applies to all request methods other than
+OPTIONS. It is executed right after the `resource_exists`
+callback, when the resource exists.
+
+image::rest_cond.png[REST conditional requests flowchart]
+
+A request becomes conditional when it includes either of
+the if-match header; the if-unmodified-since header; the
+if-none-match header; or the if-modified-since header.
+
+If the condition fails, the request ends immediately
+without any retrieval or modification of the resource.
+
+The `generate_etag` and `last_modified` are called as
+needed. Cowboy will only call them once and then cache
+the results for subsequent use.
diff --git a/docs/en/cowboy/2.13/guide/rest_flowcharts/index.html b/docs/en/cowboy/2.13/guide/rest_flowcharts/index.html
new file mode 100644
index 00000000..40123d20
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/rest_flowcharts/index.html
@@ -0,0 +1,243 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>REST flowcharts</span></h1>
+
+<p>This chapter will explain the REST handler state machine through a number of different diagrams.</p>
+<p>There are four main paths that requests may follow. One for the method OPTIONS; one for the methods GET and HEAD; one for the methods PUT, POST and PATCH; and one for the method DELETE.</p>
+<p>All paths start with the &quot;Start&quot; diagram, and all paths excluding the OPTIONS path go through the &quot;Content negotiation&quot; diagram and optionally the &quot;Conditional requests&quot; diagram if the resource exists.</p>
+<p>The red squares refer to another diagram. The light green squares indicate a response. Other squares may be either a callback or a question answered by Cowboy itself. Green arrows tend to indicate the default behavior if the callback is undefined. The star next to values indicate that the value is descriptive rather than exact.</p>
+<h2 id="_start">Start</h2>
+<p>All requests start from here.</p>
+<img src="../rest_start.png" alt="REST starting flowchart"/><p>A series of callbacks are called in succession to perform a general checkup of the service, the request line and request headers.</p>
+<p>The request body, if any, is not expected to have been received for any of these steps. It is only processed at the end of the &quot;PUT, POST and PATCH methods&quot; diagram, when all conditions have been met.</p>
+<p>The <code>known_methods</code> and <code>allowed_methods</code> callbacks return a list of methods. Cowboy then checks if the request method is in the list, and stops otherwise.</p>
+<p>The <code>is_authorized</code> callback may be used to check that access to the resource is authorized. Authentication may also be performed as needed. When authorization is denied, the return value from the callback must include a challenge applicable to the requested resource, which will be sent back to the client in the www-authenticate header.</p>
+<p>This diagram is immediately followed by either the &quot;OPTIONS method&quot; diagram when the request method is OPTIONS, or the &quot;Content negotiation&quot; diagram otherwise.</p>
+<h2 id="_options_method">OPTIONS method</h2>
+<p>This diagram only applies to OPTIONS requests.</p>
+<img src="../rest_options.png" alt="REST OPTIONS method flowchart"/><p>The <code>options</code> callback may be used to add information about the resource, such as media types or languages provided; allowed methods; any extra information. A response body may also be set, although clients should not be expected to read it.</p>
+<p>If the <code>options</code> callback is not defined, Cowboy will send a response containing the list of allowed methods by default.</p>
+<h2 id="_content_negotiation">Content negotiation</h2>
+<p>This diagram applies to all request methods other than OPTIONS. It is executed right after the &quot;Start&quot; diagram is completed.</p>
+<img src="../rest_conneg.png" alt="REST content negotiation flowchart"/><p>The purpose of these steps is to determine an appropriate representation to be sent back to the client.</p>
+<p>The request may contain any of the accept header; the accept-language header; or the accept-charset header. When present, Cowboy will parse the headers and then call the corresponding callback to obtain the list of provided content-type, language or charset for this resource. It then automatically select the best match based on the request.</p>
+<p>If a callback is not defined, Cowboy will select the content-type, language or charset that the client prefers.</p>
+<p>The <code>content_types_provided</code> also returns the name of a callback for every content-type it accepts. This callback will only be called at the end of the &quot;GET and HEAD methods&quot; diagram, when all conditions have been met.</p>
+<p>Optionally, the <code>ranges_provided</code> also returns the name of a callback for every range unit it accepts. This will be called at the end of the &quot;GET and HEAD methods&quot; diagram in the case of ranged requests.</p>
+<p>The selected content-type, language and charset are saved as meta values in the Req object. You <strong>should</strong> use the appropriate representation if you set a response body manually (alongside an error code, for example).</p>
+<p>This diagram is immediately followed by the &quot;GET and HEAD methods&quot; diagram, the &quot;PUT, POST and PATCH methods&quot; diagram, or the &quot;DELETE method&quot; diagram, depending on the method.</p>
+<h2 id="_get_and_head_methods">GET and HEAD methods</h2>
+<p>This diagram only applies to GET and HEAD requests.</p>
+<p>For a description of the <code>cond</code> step, please see the &quot;Conditional requests&quot; diagram.</p>
+<img src="../rest_get_head.png" alt="REST GET/HEAD methods flowchart"/><p>When the resource exists, and the conditional steps succeed, the resource can be retrieved.</p>
+<p>Cowboy prepares the response by first retrieving metadata about the representation, then by calling the <code>ProvideCallback</code> callback. This is the callback you defined for each content-types you returned from <code>content_types_provided</code>. This callback returns the body that will be sent back to the client.</p>
+<p>For ranged requests, but only when the <code>ranges_provided</code> callback was defined earlier, Cowboy will add the selected <code>range</code> information to the Req object and call the <code>range_satisfiable</code> callback. After confirming that the range can be provided, Cowboy calls the <code>RangeResource</code> callback and produces a ranged response using the ranged data from the callback.</p>
+<p>When the resource does not exist, Cowboy will figure out whether the resource existed previously, and if so whether it was moved elsewhere in order to redirect the client to the new URI.</p>
+<p>The <code>moved_permanently</code> and <code>moved_temporarily</code> callbacks must return the new location of the resource if it was in fact moved.</p>
+<h2 id="_put__post_and_patch_methods">PUT, POST and PATCH methods</h2>
+<p>This diagram only applies to PUT, POST and PATCH requests.</p>
+<p>For a description of the <code>cond</code> step, please see the &quot;Conditional requests&quot; diagram.</p>
+<img src="../rest_put_post_patch.png" alt="REST PUT/POST/PATCH methods flowchart"/><p>When the resource exists, first the conditional steps are executed. When that succeeds, and the method is PUT, Cowboy will call the <code>is_conflict</code> callback. This function can be used to prevent potential race conditions, by locking the resource for example.</p>
+<p>Then all three methods reach the <code>content_types_accepted</code> step that we will describe in a few paragraphs.</p>
+<p>When the resource does not exist, and the method is PUT, Cowboy will check for conflicts and then move on to the <code>content_types_accepted</code> step. For other methods, Cowboy will figure out whether the resource existed previously, and if so whether it was moved elsewhere. If the resource is truly non-existent, the method is POST and the call for <code>allow_missing_post</code> returns <code>true</code>, then Cowboy will move on to the <code>content_types_accepted</code> step. Otherwise the request processing ends there.</p>
+<p>The <code>moved_permanently</code> and <code>moved_temporarily</code> callbacks must return the new location of the resource if it was in fact moved.</p>
+<p>The <code>content_types_accepted</code> returns a list of content-types it accepts, but also the name of a callback for each of them. Cowboy will select the appropriate callback for processing the request body and call it.</p>
+<p>This callback may return one of three different return values.</p>
+<p>If an error occurred while processing the request body, it must return <code>false</code> and Cowboy will send an appropriate error response.</p>
+<p>If the method is POST, then you may return <code>true</code> with an URI of where the resource has been created. This is especially useful for writing handlers for collections.</p>
+<p>Otherwise, return <code>true</code> to indicate success. Cowboy will select the appropriate response to be sent depending on whether a resource has been created, rather than modified, and on the availability of a location header or a body in the response.</p>
+<h2 id="_delete_method">DELETE method</h2>
+<p>This diagram only applies to DELETE requests.</p>
+<p>For a description of the <code>cond</code> step, please see the &quot;Conditional requests&quot; diagram.</p>
+<img src="../rest_delete.png" alt="REST DELETE method flowchart"/><p>When the resource exists, and the conditional steps succeed, the resource can be deleted.</p>
+<p>Deleting the resource is a two steps process. First the callback <code>delete_resource</code> is executed. Use this callback to delete the resource.</p>
+<p>Because the resource may be cached, you must also delete all cached representations of this resource in the system. This operation may take a while though, so you may return before it finished.</p>
+<p>Cowboy will then call the <code>delete_completed</code> callback. If you know that the resource has been completely deleted from your system, including from caches, then you can return <code>true</code>. If any doubts persist, return <code>false</code>. Cowboy will assume <code>true</code> by default.</p>
+<p>To finish, Cowboy checks if you set a response body, and depending on that, sends the appropriate response.</p>
+<p>When the resource does not exist, Cowboy will figure out whether the resource existed previously, and if so whether it was moved elsewhere in order to redirect the client to the new URI.</p>
+<p>The <code>moved_permanently</code> and <code>moved_temporarily</code> callbacks must return the new location of the resource if it was in fact moved.</p>
+<h2 id="_conditional_requests">Conditional requests</h2>
+<p>This diagram applies to all request methods other than OPTIONS. It is executed right after the <code>resource_exists</code> callback, when the resource exists.</p>
+<img src="../rest_cond.png" alt="REST conditional requests flowchart"/><p>A request becomes conditional when it includes either of the if-match header; the if-unmodified-since header; the if-none-match header; or the if-modified-since header.</p>
+<p>If the condition fails, the request ends immediately without any retrieval or modification of the resource.</p>
+<p>The <code>generate_etag</code> and <code>last_modified</code> are called as needed. Cowboy will only call them once and then cache the results for subsequent use.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_handlers/">
+					REST handlers
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/resource_design/">
+					Designing a resource handler
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/guide/rest_handlers.asciidoc b/docs/en/cowboy/2.13/guide/rest_handlers.asciidoc
new file mode 100644
index 00000000..19a98596
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/rest_handlers.asciidoc
@@ -0,0 +1,148 @@
+[[rest_handlers]]
+== REST handlers
+
+REST is implemented in Cowboy as a sub protocol. The request
+is handled as a state machine with many optional callbacks
+describing the resource and modifying the machine's behavior.
+
+The REST handler is the recommended way to handle HTTP requests.
+
+=== Initialization
+
+First, the `init/2` callback is called. This callback is common
+to all handlers. To use REST for the current request, this function
+must return a `cowboy_rest` tuple.
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_rest, Req, State}.
+----
+
+Cowboy will then switch to the REST protocol and start executing
+the state machine.
+
+After reaching the end of the flowchart, the `terminate/3` callback
+will be called if it is defined.
+
+=== Methods
+
+The REST component has code for handling the following HTTP methods:
+HEAD, GET, POST, PATCH, PUT, DELETE and OPTIONS.
+
+Other methods can be accepted, however they have no specific callback
+defined for them at this time.
+
+=== Callbacks
+
+All callbacks are optional. Some may become mandatory depending
+on what other defined callbacks return. The various flowcharts
+in the next chapter should be a useful to determine which callbacks
+you need.
+
+All callbacks take two arguments, the Req object and the State,
+and return a three-element tuple of the form `{Value, Req, State}`.
+
+Nearly all callbacks can also return `{stop, Req, State}` to
+stop execution of the request, and
+`{{switch_handler, Module}, Req, State}` or
+`{{switch_handler, Module, Opts}, Req, State}` to switch to
+a different handler type. The exceptions are `expires`
+`generate_etag`, `last_modified` and `variances`.
+
+The following table summarizes the callbacks and their default values.
+If the callback isn't defined, then the default value will be used.
+Please look at the flowcharts to find out the result of each return
+value.
+
+In the following table, "skip" means the callback is entirely skipped
+if it is undefined, moving directly to the next step. Similarly,
+"none" means there is no default value for this callback.
+
+[cols="<,^",options="header"]
+|===
+| Callback name          | Default value
+| allowed_methods        | `[<<"GET">>, <<"HEAD">>, <<"OPTIONS">>]`
+| allow_missing_post     | `true`
+| charsets_provided      | skip
+| content_types_accepted | none
+// @todo Space required for the time being: https://github.com/spf13/hugo/issues/2398
+| content_types_provided | `[{{ <<"text">>, <<"html">>, '*'}, to_html}]`
+| delete_completed       | `true`
+| delete_resource        | `false`
+| expires                | `undefined`
+| forbidden              | `false`
+| generate_etag          | `undefined`
+| is_authorized          | `true`
+| is_conflict            | `false`
+| known_methods          | `[<<"GET">>, <<"HEAD">>, <<"POST">>, <<"PUT">>, <<"PATCH">>, <<"DELETE">>, <<"OPTIONS">>]`
+| languages_provided     | skip
+| last_modified          | `undefined`
+| malformed_request      | `false`
+| moved_permanently      | `false`
+| moved_temporarily      | `false`
+| multiple_choices       | `false`
+| options                | `ok`
+| previously_existed     | `false`
+| ranges_provided        | skip
+| range_satisfiable      | `true`
+| rate_limited           | `false`
+| resource_exists        | `true`
+| service_available      | `true`
+| uri_too_long           | `false`
+| valid_content_headers  | `true`
+| valid_entity_length    | `true`
+| variances              | `[]`
+|===
+
+As you can see, Cowboy tries to move on with the request whenever
+possible by using well thought out default values.
+
+In addition to these, there can be any number of user-defined
+callbacks that are specified through `content_types_accepted/2`,
+`content_types_provided/2` or `ranges_provided/2`. They can take
+any name (except `auto` for range callbacks), however
+it is recommended to use a separate prefix for the callbacks of
+each function. For example, `from_html` and `to_html` indicate
+in the first case that we're accepting a resource given as HTML,
+and in the second case that we send one as HTML.
+
+=== Meta data
+
+Cowboy will set informative values to the Req object at various
+points of the execution. You can retrieve them by matching the
+Req object directly. The values are defined in the following table:
+
+[cols="<,<",options="header"]
+|===
+| Key        | Details
+| media_type | The content-type negotiated for the response entity
+| language   | The language negotiated for the response entity
+| charset    | The charset negotiated for the response entity
+| range      | The range selected for the ranged response
+|===
+
+They can be used to send a proper body with the response to a
+request that used a method other than HEAD or GET.
+
+=== Response headers
+
+Cowboy will set response headers automatically over the execution
+of the REST code. They are listed in the following table.
+
+[cols="<,<",options="header"]
+|===
+| Header name      | Details
+| accept-ranges    | Range units accepted by the resource
+| allow            | HTTP methods allowed by the resource
+| content-language | Language used in the response body
+| content-range    | Range of the content found in the response
+| content-type     | Media type and charset of the response body
+| etag             | Etag of the resource
+| expires          | Expiration date of the resource
+| last-modified    | Last modification date for the resource
+| location         | Relative or absolute URI to the requested resource
+| retry-after      | Delay or time the client should wait before accessing the resource
+| vary             | List of headers that may change the representation of the resource
+| www-authenticate | Authentication information to access the resource
+|===
diff --git a/docs/en/cowboy/2.13/guide/rest_handlers/index.html b/docs/en/cowboy/2.13/guide/rest_handlers/index.html
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+<!DOCTYPE html>
+<html lang="en">
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+<h1 class="lined-header"><span>REST handlers</span></h1>
+
+<p>REST is implemented in Cowboy as a sub protocol. The request is handled as a state machine with many optional callbacks describing the resource and modifying the machine&apos;s behavior.</p>
+<p>The REST handler is the recommended way to handle HTTP requests.</p>
+<h2 id="_initialization">Initialization</h2>
+<p>First, the <code>init/2</code> callback is called. This callback is common to all handlers. To use REST for the current request, this function must return a <code>cowboy_rest</code> tuple.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_rest</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy will then switch to the REST protocol and start executing the state machine.</p>
+<p>After reaching the end of the flowchart, the <code>terminate/3</code> callback will be called if it is defined.</p>
+<h2 id="_methods">Methods</h2>
+<p>The REST component has code for handling the following HTTP methods: HEAD, GET, POST, PATCH, PUT, DELETE and OPTIONS.</p>
+<p>Other methods can be accepted, however they have no specific callback defined for them at this time.</p>
+<h2 id="_callbacks">Callbacks</h2>
+<p>All callbacks are optional. Some may become mandatory depending on what other defined callbacks return. The various flowcharts in the next chapter should be a useful to determine which callbacks you need.</p>
+<p>All callbacks take two arguments, the Req object and the State, and return a three-element tuple of the form <code>{Value, Req, State}</code>.</p>
+<p>Nearly all callbacks can also return <code>{stop, Req, State}</code> to stop execution of the request, and <code>{{switch_handler, Module}, Req, State}</code> or <code>{{switch_handler, Module, Opts}, Req, State}</code> to switch to a different handler type. The exceptions are <code>expires</code> <code>generate_etag</code>, <code>last_modified</code> and <code>variances</code>.</p>
+<p>The following table summarizes the callbacks and their default values. If the callback isn&apos;t defined, then the default value will be used. Please look at the flowcharts to find out the result of each return value.</p>
+<p>In the following table, &quot;skip&quot; means the callback is entirely skipped if it is undefined, moving directly to the next step. Similarly, &quot;none&quot; means there is no default value for this callback.</p>
+<table rules="all" width="100%" frame="border"
+			cellspacing="0" cellpadding="4">
+<thead><tr><th>Callback name</th>
+<th>Default value</th>
+</tr></thead><tbody><tr><td>allowed_methods</td>
+<td><code>[&lt;&lt;&quot;GET&quot;&gt;&gt;, &lt;&lt;&quot;HEAD&quot;&gt;&gt;, &lt;&lt;&quot;OPTIONS&quot;&gt;&gt;]</code></td>
+</tr>
+<tr><td>allow_missing_post</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>charsets_provided</td>
+<td>skip</td>
+</tr>
+<tr><td>content_types_accepted</td>
+<td>none</td>
+</tr>
+<tr><td>content_types_provided</td>
+<td><code>[{{ &lt;&lt;&quot;text&quot;&gt;&gt;, &lt;&lt;&quot;html&quot;&gt;&gt;, &apos;*&apos;}, to_html}]</code></td>
+</tr>
+<tr><td>delete_completed</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>delete_resource</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>expires</td>
+<td><code>undefined</code></td>
+</tr>
+<tr><td>forbidden</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>generate_etag</td>
+<td><code>undefined</code></td>
+</tr>
+<tr><td>is_authorized</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>is_conflict</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>known_methods</td>
+<td><code>[&lt;&lt;&quot;GET&quot;&gt;&gt;, &lt;&lt;&quot;HEAD&quot;&gt;&gt;, &lt;&lt;&quot;POST&quot;&gt;&gt;, &lt;&lt;&quot;PUT&quot;&gt;&gt;, &lt;&lt;&quot;PATCH&quot;&gt;&gt;, &lt;&lt;&quot;DELETE&quot;&gt;&gt;, &lt;&lt;&quot;OPTIONS&quot;&gt;&gt;]</code></td>
+</tr>
+<tr><td>languages_provided</td>
+<td>skip</td>
+</tr>
+<tr><td>last_modified</td>
+<td><code>undefined</code></td>
+</tr>
+<tr><td>malformed_request</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>moved_permanently</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>moved_temporarily</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>multiple_choices</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>options</td>
+<td><code>ok</code></td>
+</tr>
+<tr><td>previously_existed</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>ranges_provided</td>
+<td>skip</td>
+</tr>
+<tr><td>range_satisfiable</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>rate_limited</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>resource_exists</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>service_available</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>uri_too_long</td>
+<td><code>false</code></td>
+</tr>
+<tr><td>valid_content_headers</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>valid_entity_length</td>
+<td><code>true</code></td>
+</tr>
+<tr><td>variances</td>
+<td><code>[]</code></td>
+</tr>
+</tbody></table>
+<p>As you can see, Cowboy tries to move on with the request whenever possible by using well thought out default values.</p>
+<p>In addition to these, there can be any number of user-defined callbacks that are specified through <code>content_types_accepted/2</code>, <code>content_types_provided/2</code> or <code>ranges_provided/2</code>. They can take any name (except <code>auto</code> for range callbacks), however it is recommended to use a separate prefix for the callbacks of each function. For example, <code>from_html</code> and <code>to_html</code> indicate in the first case that we&apos;re accepting a resource given as HTML, and in the second case that we send one as HTML.</p>
+<h2 id="_meta_data">Meta data</h2>
+<p>Cowboy will set informative values to the Req object at various points of the execution. You can retrieve them by matching the Req object directly. The values are defined in the following table:</p>
+<table rules="all" width="100%" frame="border"
+			cellspacing="0" cellpadding="4">
+<thead><tr><th>Key</th>
+<th>Details</th>
+</tr></thead><tbody><tr><td>media_type</td>
+<td>The content-type negotiated for the response entity</td>
+</tr>
+<tr><td>language</td>
+<td>The language negotiated for the response entity</td>
+</tr>
+<tr><td>charset</td>
+<td>The charset negotiated for the response entity</td>
+</tr>
+<tr><td>range</td>
+<td>The range selected for the ranged response</td>
+</tr>
+</tbody></table>
+<p>They can be used to send a proper body with the response to a request that used a method other than HEAD or GET.</p>
+<h2 id="_response_headers">Response headers</h2>
+<p>Cowboy will set response headers automatically over the execution of the REST code. They are listed in the following table.</p>
+<table rules="all" width="100%" frame="border"
+			cellspacing="0" cellpadding="4">
+<thead><tr><th>Header name</th>
+<th>Details</th>
+</tr></thead><tbody><tr><td>accept-ranges</td>
+<td>Range units accepted by the resource</td>
+</tr>
+<tr><td>allow</td>
+<td>HTTP methods allowed by the resource</td>
+</tr>
+<tr><td>content-language</td>
+<td>Language used in the response body</td>
+</tr>
+<tr><td>content-range</td>
+<td>Range of the content found in the response</td>
+</tr>
+<tr><td>content-type</td>
+<td>Media type and charset of the response body</td>
+</tr>
+<tr><td>etag</td>
+<td>Etag of the resource</td>
+</tr>
+<tr><td>expires</td>
+<td>Expiration date of the resource</td>
+</tr>
+<tr><td>last-modified</td>
+<td>Last modification date for the resource</td>
+</tr>
+<tr><td>location</td>
+<td>Relative or absolute URI to the requested resource</td>
+</tr>
+<tr><td>retry-after</td>
+<td>Delay or time the client should wait before accessing the resource</td>
+</tr>
+<tr><td>vary</td>
+<td>List of headers that may change the representation of the resource</td>
+</tr>
+<tr><td>www-authenticate</td>
+<td>Authentication information to access the resource</td>
+</tr>
+</tbody></table>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_principles/">
+					REST principles
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_flowcharts/">
+					REST flowcharts
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
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diff --git a/docs/en/cowboy/2.13/guide/rest_principles.asciidoc b/docs/en/cowboy/2.13/guide/rest_principles.asciidoc
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--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/rest_principles.asciidoc
@@ -0,0 +1,160 @@
+[[rest_principles]]
+== REST principles
+
+This chapter will attempt to define the concepts behind REST
+and explain what makes a service RESTful.
+
+REST is often confused with performing a distinct operation
+depending on the HTTP method, while using more than the GET
+and POST methods. That's highly misguided at best.
+
+We will first attempt to define REST and will look at what
+it means in the context of HTTP and the Web.
+For a more in-depth explanation of REST, you can read
+http://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm[Roy T. Fielding's dissertation]
+as it does a great job explaining where it comes from and
+what it achieves.
+
+=== REST architecture
+
+REST is a *client-server* architecture. The client and the server
+both have a different set of concerns. The server stores and/or
+manipulates information and makes it available to the user in
+an efficient manner. The client takes that information and
+displays it to the user and/or uses it to perform subsequent
+requests for information. This separation of concerns allows both
+the client and the server to evolve independently as it only
+requires that the interface stays the same.
+
+REST is *stateless*. That means the communication between the
+client and the server always contains all the information needed
+to perform the request. There is no session state in the server,
+it is kept entirely on the client's side. If access to a resource
+requires authentication, then the client needs to authenticate
+itself with every request.
+
+REST is *cacheable*. The client, the server and any intermediary
+components can all cache resources in order to improve performance.
+
+REST provides a *uniform interface* between components. This
+simplifies the architecture, as all components follow the same
+rules to speak to one another. It also makes it easier to understand
+the interactions between the different components of the system.
+A number of constraints are required to achieve this. They are
+covered in the rest of the chapter.
+
+REST is a *layered system*. Individual components cannot see
+beyond the immediate layer with which they are interacting. This
+means that a client connecting to an intermediate component, like
+a proxy, has no knowledge of what lies beyond. This allows
+components to be independent and thus easily replaceable or
+extendable.
+
+REST optionally provides *code on demand*. Code may be downloaded
+to extend client functionality. This is optional however because
+the client may not be able to download or run this code, and so
+a REST component cannot rely on it being executed.
+
+=== Resources and resource identifiers
+
+A resource is an abstract concept. In a REST system, any information
+that can be named may be a resource. This includes documents, images,
+a collection of resources and any other information. Any information
+that can be the target of an hypertext link can be a resource.
+
+A resource is a conceptual mapping to a set of entities. The set of
+entities evolves over time; a resource doesn't. For example, a resource
+can map to "users who have logged in this past month" and another
+to "all users". At some point in time they may map to the same set of
+entities, because all users logged in this past month. But they are
+still different resources. Similarly, if nobody logged in recently,
+then the first resource may map to the empty set. This resource exists
+regardless of the information it maps to.
+
+Resources are identified by uniform resource identifiers, also known
+as URIs. Sometimes internationalized resource identifiers, or IRIs,
+may also be used, but these can be directly translated into a URI.
+
+In practice we will identify two kinds of resources. Individual
+resources map to a set of one element, for example "user Joe".
+Collection of resources map to a set of 0 to N elements,
+for example "all users".
+
+=== Resource representations
+
+The representation of a resource is a sequence of bytes associated
+with metadata.
+
+The metadata comes as a list of key-value pairs, where the name
+corresponds to a standard that defines the value's structure and
+semantics. With HTTP, the metadata comes in the form of request
+or response headers. The headers' structure and semantics are well
+defined in the HTTP standard. Metadata includes representation
+metadata, resource metadata and control data.
+
+The representation metadata gives information about the
+representation, such as its media type, the date of last
+modification, or even a checksum.
+
+Resource metadata could be link to related resources or
+information about additional representations of the resource.
+
+Control data allows parameterizing the request or response.
+For example, we may only want the representation returned if
+it is more recent than the one we have in cache. Similarly,
+we may want to instruct the client about how it should cache
+the representation. This isn't restricted to caching. We may,
+for example, want to store a new representation of a resource
+only if it wasn't modified since we first retrieved it.
+
+The data format of a representation is also known as the media
+type. Some media types are intended for direct rendering to the
+user, while others are intended for automated processing. The
+media type is a key component of the REST architecture.
+
+=== Self-descriptive messages
+
+Messages must be self-descriptive. That means that the data
+format of a representation must always come with its media
+type (and similarly requesting a resource involves choosing
+the media type of the representation returned). If you are
+sending HTML, then you must say it is HTML by sending the
+media type with the representation. In HTTP this is done
+using the content-type header.
+
+The media type is often an IANA registered media type, like
+`text/html` or `image/png`, but does not need to be. Exactly
+two things are important for respecting this constraint: that
+the media type is well specified, and that the sender and
+recipient agree about what the media type refers to.
+
+This means that you can create your own media types, like
+`application/x-mine`, and that as long as you write the
+specifications for it and that both endpoints agree about
+it then the constraint is respected.
+
+=== Hypermedia as the engine of application state
+
+The last constraint is generally where services that claim
+to be RESTful fail. Interactions with a server must be
+entirely driven by hypermedia. The client does not need
+any prior knowledge of the service in order to use it,
+other than an entry point and of course basic understanding
+of the media type of the representations, at the very least
+enough to find and identify hyperlinks and link relations.
+
+To give a simple example, if your service only works with
+the `application/json` media type then this constraint
+cannot be respected (as there are no concept of links in
+JSON) and thus your service isn't RESTful. This is the case
+for the majority of self-proclaimed REST services.
+
+On the other hand if you create a JSON based media type
+that has a concept of links and link relations, then
+your service might be RESTful.
+
+Respecting this constraint means that the entirety of the
+service becomes self-discoverable, not only the resources
+in it, but also the operations you can perform on it. This
+makes clients very thin as there is no need to implement
+anything specific to the service to operate on it.
diff --git a/docs/en/cowboy/2.13/guide/rest_principles/index.html b/docs/en/cowboy/2.13/guide/rest_principles/index.html
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+<h1 class="lined-header"><span>REST principles</span></h1>
+
+<p>This chapter will attempt to define the concepts behind REST and explain what makes a service RESTful.</p>
+<p>REST is often confused with performing a distinct operation depending on the HTTP method, while using more than the GET and POST methods. That&apos;s highly misguided at best.</p>
+<p>We will first attempt to define REST and will look at what it means in the context of HTTP and the Web. For a more in-depth explanation of REST, you can read <a href="http://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm">Roy T. Fielding&apos;s dissertation</a> as it does a great job explaining where it comes from and what it achieves.</p>
+<h2 id="_rest_architecture">REST architecture</h2>
+<p>REST is a <strong>client-server</strong> architecture. The client and the server both have a different set of concerns. The server stores and/or manipulates information and makes it available to the user in an efficient manner. The client takes that information and displays it to the user and/or uses it to perform subsequent requests for information. This separation of concerns allows both the client and the server to evolve independently as it only requires that the interface stays the same.</p>
+<p>REST is <strong>stateless</strong>. That means the communication between the client and the server always contains all the information needed to perform the request. There is no session state in the server, it is kept entirely on the client&apos;s side. If access to a resource requires authentication, then the client needs to authenticate itself with every request.</p>
+<p>REST is <strong>cacheable</strong>. The client, the server and any intermediary components can all cache resources in order to improve performance.</p>
+<p>REST provides a <strong>uniform interface</strong> between components. This simplifies the architecture, as all components follow the same rules to speak to one another. It also makes it easier to understand the interactions between the different components of the system. A number of constraints are required to achieve this. They are covered in the rest of the chapter.</p>
+<p>REST is a <strong>layered system</strong>. Individual components cannot see beyond the immediate layer with which they are interacting. This means that a client connecting to an intermediate component, like a proxy, has no knowledge of what lies beyond. This allows components to be independent and thus easily replaceable or extendable.</p>
+<p>REST optionally provides <strong>code on demand</strong>. Code may be downloaded to extend client functionality. This is optional however because the client may not be able to download or run this code, and so a REST component cannot rely on it being executed.</p>
+<h2 id="_resources_and_resource_identifiers">Resources and resource identifiers</h2>
+<p>A resource is an abstract concept. In a REST system, any information that can be named may be a resource. This includes documents, images, a collection of resources and any other information. Any information that can be the target of an hypertext link can be a resource.</p>
+<p>A resource is a conceptual mapping to a set of entities. The set of entities evolves over time; a resource doesn&apos;t. For example, a resource can map to &quot;users who have logged in this past month&quot; and another to &quot;all users&quot;. At some point in time they may map to the same set of entities, because all users logged in this past month. But they are still different resources. Similarly, if nobody logged in recently, then the first resource may map to the empty set. This resource exists regardless of the information it maps to.</p>
+<p>Resources are identified by uniform resource identifiers, also known as URIs. Sometimes internationalized resource identifiers, or IRIs, may also be used, but these can be directly translated into a URI.</p>
+<p>In practice we will identify two kinds of resources. Individual resources map to a set of one element, for example &quot;user Joe&quot;. Collection of resources map to a set of 0 to N elements, for example &quot;all users&quot;.</p>
+<h2 id="_resource_representations">Resource representations</h2>
+<p>The representation of a resource is a sequence of bytes associated with metadata.</p>
+<p>The metadata comes as a list of key-value pairs, where the name corresponds to a standard that defines the value&apos;s structure and semantics. With HTTP, the metadata comes in the form of request or response headers. The headers&apos; structure and semantics are well defined in the HTTP standard. Metadata includes representation metadata, resource metadata and control data.</p>
+<p>The representation metadata gives information about the representation, such as its media type, the date of last modification, or even a checksum.</p>
+<p>Resource metadata could be link to related resources or information about additional representations of the resource.</p>
+<p>Control data allows parameterizing the request or response. For example, we may only want the representation returned if it is more recent than the one we have in cache. Similarly, we may want to instruct the client about how it should cache the representation. This isn&apos;t restricted to caching. We may, for example, want to store a new representation of a resource only if it wasn&apos;t modified since we first retrieved it.</p>
+<p>The data format of a representation is also known as the media type. Some media types are intended for direct rendering to the user, while others are intended for automated processing. The media type is a key component of the REST architecture.</p>
+<h2 id="_self_descriptive_messages">Self-descriptive messages</h2>
+<p>Messages must be self-descriptive. That means that the data format of a representation must always come with its media type (and similarly requesting a resource involves choosing the media type of the representation returned). If you are sending HTML, then you must say it is HTML by sending the media type with the representation. In HTTP this is done using the content-type header.</p>
+<p>The media type is often an IANA registered media type, like <code>text/html</code> or <code>image/png</code>, but does not need to be. Exactly two things are important for respecting this constraint: that the media type is well specified, and that the sender and recipient agree about what the media type refers to.</p>
+<p>This means that you can create your own media types, like <code>application/x-mine</code>, and that as long as you write the specifications for it and that both endpoints agree about it then the constraint is respected.</p>
+<h2 id="_hypermedia_as_the_engine_of_application_state">Hypermedia as the engine of application state</h2>
+<p>The last constraint is generally where services that claim to be RESTful fail. Interactions with a server must be entirely driven by hypermedia. The client does not need any prior knowledge of the service in order to use it, other than an entry point and of course basic understanding of the media type of the representations, at the very least enough to find and identify hyperlinks and link relations.</p>
+<p>To give a simple example, if your service only works with the <code>application/json</code> media type then this constraint cannot be respected (as there are no concept of links in JSON) and thus your service isn&apos;t RESTful. This is the case for the majority of self-proclaimed REST services.</p>
+<p>On the other hand if you create a JSON based media type that has a concept of links and link relations, then your service might be RESTful.</p>
+<p>Respecting this constraint means that the entirety of the service becomes self-discoverable, not only the resources in it, but also the operations you can perform on it. This makes clients very thin as there is no need to implement anything specific to the service to operate on it.</p>
+
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+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_handlers/">
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+	User Guide
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+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
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diff --git a/docs/en/cowboy/2.13/guide/routing.asciidoc b/docs/en/cowboy/2.13/guide/routing.asciidoc
new file mode 100644
index 00000000..37d3e5aa
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/routing.asciidoc
@@ -0,0 +1,271 @@
+[[routing]]
+== Routing
+
+Cowboy does nothing by default.
+
+To make Cowboy useful, you need to map URIs to Erlang modules that will
+handle the requests. This is called routing.
+
+Cowboy routes requests using the following algorithm:
+
+* If no configured host matches the request URI, a 400 response
+  is returned.
+
+* Otherwise, the first configured host that matches the request
+  URI will be used. Only the paths configured for this host will
+  be considered.
+
+* If none of the configured paths found in the previous step
+  match the request URI, a 404 response is returned.
+
+* Otherwise, the handler and its initial state are added to the
+  environment and the request continues to be processed.
+
+NOTE: It is possible to run into a situation where two hosts match a
+request URI, but only the paths on the second host match the
+request URI. In this case the expected result is a 404 response
+because the only paths used during routing are the paths from
+the first configured host that matches the request URI.
+
+Routes need to be compiled before they can be used by Cowboy.
+The result of the compilation is the dispatch rules.
+
+=== Syntax
+
+The general structure for the routes is defined as follow.
+
+[source,erlang]
+Routes = [Host1, Host2, ... HostN].
+
+Each host contains matching rules for the host along with optional
+constraints, and a list of routes for the path component.
+
+[source,erlang]
+Host1 = {HostMatch, PathsList}.
+Host2 = {HostMatch, Constraints, PathsList}.
+
+The list of routes for the path component is defined similar to the
+list of hosts.
+
+[source,erlang]
+PathsList = [Path1, Path2, ... PathN].
+
+Finally, each path contains matching rules for the path along with
+optional constraints, and gives us the handler module to be used
+along with its initial state.
+
+[source,erlang]
+Path1 = {PathMatch, Handler, InitialState}.
+Path2 = {PathMatch, Constraints, Handler, InitialState}.
+
+Continue reading to learn more about the match syntax and the optional
+constraints.
+
+=== Match syntax
+
+The match syntax is used to associate host names and paths with their
+respective handlers.
+
+The match syntax is the same for host and path with a few subtleties.
+Indeed, the segments separator is different, and the host is matched
+starting from the last segment going to the first. All examples will
+feature both host and path match rules and explain the differences
+when encountered.
+
+Excluding special values that we will explain at the end of this section,
+the simplest match value is a host or a path. It can be given as either
+a `string()` or a `binary()`.
+
+[source,erlang]
+----
+PathMatch1 = "/".
+PathMatch2 = "/path/to/resource".
+
+HostMatch1 = "cowboy.example.org".
+----
+
+As you can see, all paths defined this way must start with a slash
+character. Note that these two paths are identical as far as routing
+is concerned.
+
+[source,erlang]
+PathMatch2 = "/path/to/resource".
+PathMatch3 = "/path/to/resource/".
+
+Hosts with and without a trailing dot are equivalent for routing.
+Similarly, hosts with and without a leading dot are also equivalent.
+
+[source,erlang]
+HostMatch1 = "cowboy.example.org".
+HostMatch2 = "cowboy.example.org.".
+HostMatch3 = ".cowboy.example.org".
+
+It is possible to extract segments of the host and path and to store
+the values in the `Req` object for later use. We call these kind of
+values bindings.
+
+The syntax for bindings is very simple. A segment that begins with
+the `:` character means that what follows until the end of the segment
+is the name of the binding in which the segment value will be stored.
+
+[source,erlang]
+PathMatch = "/hats/:name/prices".
+HostMatch = ":subdomain.example.org".
+
+If these two end up matching when routing, you will end up with two
+bindings defined, `subdomain` and `name`, each containing the
+segment value where they were defined. For example, the URL
+`http://test.example.org/hats/wild_cowboy_legendary/prices` will
+result in having the value `test` bound to the name `subdomain`
+and the value `wild_cowboy_legendary` bound to the name `name`.
+They can later be retrieved using `cowboy_req:binding/{2,3}`. The
+binding name must be given as an atom.
+
+There is a special binding name you can use to mimic the underscore
+variable in Erlang. Any match against the `_` binding will succeed
+but the data will be discarded. This is especially useful for
+matching against many domain names in one go.
+
+[source,erlang]
+HostMatch = "ninenines.:_".
+
+Similarly, it is possible to have optional segments. Anything
+between brackets is optional.
+
+[source,erlang]
+PathMatch = "/hats/[page/:number]".
+HostMatch = "[www.]ninenines.eu".
+
+You can also have imbricated optional segments.
+
+[source,erlang]
+PathMatch = "/hats/[page/[:number]]".
+
+While Cowboy does not reject multiple brackets in a route,
+the behavior may be undefined if the route is under-specified.
+For example, this route requires constraints to determine what
+is a chapter and what is a page, since they are both optional:
+
+[source,erlang]
+PathMatch = "/book/[:chapter]/[:page]".
+
+You can retrieve the rest of the host or path using `[...]`.
+In the case of hosts it will match anything before, in the case
+of paths anything after the previously matched segments. It is
+a special case of optional segments, in that it can have
+zero, one or many segments. You can then find the segments using
+`cowboy_req:host_info/1` and `cowboy_req:path_info/1` respectively.
+They will be represented as a list of segments.
+
+[source,erlang]
+PathMatch = "/hats/[...]".
+HostMatch = "[...]ninenines.eu".
+
+If a binding appears twice in the routing rules, then the match
+will succeed only if they share the same value. This copies the
+Erlang pattern matching behavior.
+
+[source,erlang]
+PathMatch = "/hats/:name/:name".
+
+This is also true when an optional segment is present. In this
+case the two values must be identical only if the segment is
+available.
+
+[source,erlang]
+PathMatch = "/hats/:name/[:name]".
+
+If a binding is defined in both the host and path, then they must
+also share the same value.
+
+[source,erlang]
+PathMatch = "/:user/[...]".
+HostMatch = ":user.github.com".
+
+Finally, there are two special match values that can be used. The
+first is the atom `'_'` which will match any host or path.
+
+[source,erlang]
+PathMatch = '_'.
+HostMatch = '_'.
+
+The second is the special host match `"*"` which will match the
+wildcard path, generally used alongside the `OPTIONS` method.
+
+[source,erlang]
+HostMatch = "*".
+
+=== Constraints
+
+After the matching has completed, the resulting bindings can be tested
+against a set of constraints. Constraints are only tested when the
+binding is defined. They run in the order you defined them. The match
+will succeed only if they all succeed. If the match fails, then Cowboy
+tries the next route in the list.
+
+The format used for constraints is the same as match functions in
+`cowboy_req`: they are provided as a list of fields which may have
+one or more constraints. While the router accepts the same format,
+it will skip fields with no constraints and will also ignore default
+values, if any.
+
+Read more about xref:constraints[constraints].
+
+=== Compilation
+
+The routes must be compiled before Cowboy can use them. The compilation
+step normalizes the routes to simplify the code and speed up the
+execution, but the routes are still looked up one by one in the end.
+Faster compilation strategies could be to compile the routes directly
+to Erlang code, but would require heavier dependencies.
+
+To compile routes, just call the appropriate function:
+
+[source,erlang]
+----
+Dispatch = cowboy_router:compile([
+    %% {HostMatch, list({PathMatch, Handler, InitialState})}
+    {'_', [{'_', my_handler, #{}}]}
+]),
+%% Name, TransOpts, ProtoOpts
+cowboy:start_clear(my_http_listener,
+    [{port, 8080}],
+    #{env => #{dispatch => Dispatch}}
+).
+----
+
+=== Using persistent_term
+
+The routes can be stored in `persistent_term` starting from
+Erlang/OTP 21.2. This may give a performance improvement when
+there are a large number of routes.
+
+To use this functionality you need to compile the routes,
+store them in `persistent_term` and then inform Cowboy:
+
+[source,erlang]
+----
+Dispatch = cowboy_router:compile([
+    {'_', [{'_', my_handler, #{}}]}
+]),
+persistent_term:put(my_app_dispatch, Dispatch),
+cowboy:start_clear(my_http_listener,
+    [{port, 8080}],
+    #{env => #{dispatch => {persistent_term, my_app_dispatch}}}
+).
+----
+
+=== Live update
+
+You can use the `cowboy:set_env/3` function for updating the dispatch
+list used by routing. This will apply to all new connections accepted
+by the listener:
+
+[source,erlang]
+Dispatch = cowboy_router:compile(Routes),
+cowboy:set_env(my_http_listener, dispatch, Dispatch).
+
+Note that you need to compile the routes again before updating.
+
+When using `persistent_term` there is no need to call this function,
+you can simply put the new routes in the storage.
diff --git a/docs/en/cowboy/2.13/guide/routing/index.html b/docs/en/cowboy/2.13/guide/routing/index.html
new file mode 100644
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--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/routing/index.html
@@ -0,0 +1,392 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="contents" class="two_col">
+<div class="container">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Routing</span></h1>
+
+<p>Cowboy does nothing by default.</p>
+<p>To make Cowboy useful, you need to map URIs to Erlang modules that will handle the requests. This is called routing.</p>
+<p>Cowboy routes requests using the following algorithm:</p>
+<ul><li>If no configured host matches the request URI, a 400 response is returned.
+</li>
+<li>Otherwise, the first configured host that matches the request URI will be used. Only the paths configured for this host will be considered.
+</li>
+<li>If none of the configured paths found in the previous step match the request URI, a 404 response is returned.
+</li>
+<li>Otherwise, the handler and its initial state are added to the environment and the request continues to be processed.
+</li>
+</ul>
+<p>NOTE: It is possible to run into a situation where two hosts match a request URI, but only the paths on the second host match the request URI. In this case the expected result is a 404 response because the only paths used during routing are the paths from the first configured host that matches the request URI.</p>
+<p>Routes need to be compiled before they can be used by Cowboy. The result of the compilation is the dispatch rules.</p>
+<h2 id="_syntax">Syntax</h2>
+<p>The general structure for the routes is defined as follow.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Routes</font> <font color="#990000">=</font> [<font color="#009900">Host1</font>, <font color="#009900">Host2</font>, <font color="#990000">...</font> <font color="#009900">HostN</font>]<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Each host contains matching rules for the host along with optional constraints, and a list of routes for the path component.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Host1</font> <font color="#990000">=</font> {<font color="#009900">HostMatch</font>, <font color="#009900">PathsList</font>}<font color="#990000">.</font>
+<font color="#009900">Host2</font> <font color="#990000">=</font> {<font color="#009900">HostMatch</font>, <font color="#009900">Constraints</font>, <font color="#009900">PathsList</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The list of routes for the path component is defined similar to the list of hosts.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathsList</font> <font color="#990000">=</font> [<font color="#009900">Path1</font>, <font color="#009900">Path2</font>, <font color="#990000">...</font> <font color="#009900">PathN</font>]<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Finally, each path contains matching rules for the path along with optional constraints, and gives us the handler module to be used along with its initial state.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Path1</font> <font color="#990000">=</font> {<font color="#009900">PathMatch</font>, <font color="#009900">Handler</font>, <font color="#009900">InitialState</font>}<font color="#990000">.</font>
+<font color="#009900">Path2</font> <font color="#990000">=</font> {<font color="#009900">PathMatch</font>, <font color="#009900">Constraints</font>, <font color="#009900">Handler</font>, <font color="#009900">InitialState</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Continue reading to learn more about the match syntax and the optional constraints.</p>
+<h2 id="_match_syntax">Match syntax</h2>
+<p>The match syntax is used to associate host names and paths with their respective handlers.</p>
+<p>The match syntax is the same for host and path with a few subtleties. Indeed, the segments separator is different, and the host is matched starting from the last segment going to the first. All examples will feature both host and path match rules and explain the differences when encountered.</p>
+<p>Excluding special values that we will explain at the end of this section, the simplest match value is a host or a path. It can be given as either a <code>string()</code> or a <code>binary()</code>.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch1</font> <font color="#990000">=</font> <font color="#FF0000">"/"</font><font color="#990000">.</font>
+<font color="#009900">PathMatch2</font> <font color="#990000">=</font> <font color="#FF0000">"/path/to/resource"</font><font color="#990000">.</font>
+
+<font color="#009900">HostMatch1</font> <font color="#990000">=</font> <font color="#FF0000">"cowboy.example.org"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>As you can see, all paths defined this way must start with a slash character. Note that these two paths are identical as far as routing is concerned.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch2</font> <font color="#990000">=</font> <font color="#FF0000">"/path/to/resource"</font><font color="#990000">.</font>
+<font color="#009900">PathMatch3</font> <font color="#990000">=</font> <font color="#FF0000">"/path/to/resource/"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Hosts with and without a trailing dot are equivalent for routing. Similarly, hosts with and without a leading dot are also equivalent.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">HostMatch1</font> <font color="#990000">=</font> <font color="#FF0000">"cowboy.example.org"</font><font color="#990000">.</font>
+<font color="#009900">HostMatch2</font> <font color="#990000">=</font> <font color="#FF0000">"cowboy.example.org."</font><font color="#990000">.</font>
+<font color="#009900">HostMatch3</font> <font color="#990000">=</font> <font color="#FF0000">".cowboy.example.org"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>It is possible to extract segments of the host and path and to store the values in the <code>Req</code> object for later use. We call these kind of values bindings.</p>
+<p>The syntax for bindings is very simple. A segment that begins with the <code>:</code> character means that what follows until the end of the segment is the name of the binding in which the segment value will be stored.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/hats/:name/prices"</font><font color="#990000">.</font>
+<font color="#009900">HostMatch</font> <font color="#990000">=</font> <font color="#FF0000">":subdomain.example.org"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>If these two end up matching when routing, you will end up with two bindings defined, <code>subdomain</code> and <code>name</code>, each containing the segment value where they were defined. For example, the URL <code>http://test.example.org/hats/wild_cowboy_legendary/prices</code> will result in having the value <code>test</code> bound to the name <code>subdomain</code> and the value <code>wild_cowboy_legendary</code> bound to the name <code>name</code>. They can later be retrieved using <code>cowboy_req:binding/{2,3}</code>. The binding name must be given as an atom.</p>
+<p>There is a special binding name you can use to mimic the underscore variable in Erlang. Any match against the <code>_</code> binding will succeed but the data will be discarded. This is especially useful for matching against many domain names in one go.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">HostMatch</font> <font color="#990000">=</font> <font color="#FF0000">"ninenines.:_"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Similarly, it is possible to have optional segments. Anything between brackets is optional.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/hats/[page/:number]"</font><font color="#990000">.</font>
+<font color="#009900">HostMatch</font> <font color="#990000">=</font> <font color="#FF0000">"[www.]ninenines.eu"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>You can also have imbricated optional segments.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/hats/[page/[:number]]"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>While Cowboy does not reject multiple brackets in a route, the behavior may be undefined if the route is under-specified. For example, this route requires constraints to determine what is a chapter and what is a page, since they are both optional:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/book/[:chapter]/[:page]"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>You can retrieve the rest of the host or path using <code>[...]</code>. In the case of hosts it will match anything before, in the case of paths anything after the previously matched segments. It is a special case of optional segments, in that it can have zero, one or many segments. You can then find the segments using <code>cowboy_req:host_info/1</code> and <code>cowboy_req:path_info/1</code> respectively. They will be represented as a list of segments.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/hats/[...]"</font><font color="#990000">.</font>
+<font color="#009900">HostMatch</font> <font color="#990000">=</font> <font color="#FF0000">"[...]ninenines.eu"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>If a binding appears twice in the routing rules, then the match will succeed only if they share the same value. This copies the Erlang pattern matching behavior.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/hats/:name/:name"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>This is also true when an optional segment is present. In this case the two values must be identical only if the segment is available.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/hats/:name/[:name]"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>If a binding is defined in both the host and path, then they must also share the same value.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF0000">"/:user/[...]"</font><font color="#990000">.</font>
+<font color="#009900">HostMatch</font> <font color="#990000">=</font> <font color="#FF0000">":user.github.com"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Finally, there are two special match values that can be used. The first is the atom <code>&apos;_&apos;</code> which will match any host or path.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathMatch</font> <font color="#990000">=</font> <font color="#FF6600">'_'</font><font color="#990000">.</font>
+<font color="#009900">HostMatch</font> <font color="#990000">=</font> <font color="#FF6600">'_'</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The second is the special host match <code>&quot;*&quot;</code> which will match the wildcard path, generally used alongside the <code>OPTIONS</code> method.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">HostMatch</font> <font color="#990000">=</font> <font color="#FF0000">"*"</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_constraints">Constraints</h2>
+<p>After the matching has completed, the resulting bindings can be tested against a set of constraints. Constraints are only tested when the binding is defined. They run in the order you defined them. The match will succeed only if they all succeed. If the match fails, then Cowboy tries the next route in the list.</p>
+<p>The format used for constraints is the same as match functions in <code>cowboy_req</code>: they are provided as a list of fields which may have one or more constraints. While the router accepts the same format, it will skip fields with no constraints and will also ignore default values, if any.</p>
+<p>Read more about <a href="../constraints">constraints</a>.</p>
+<h2 id="_compilation">Compilation</h2>
+<p>The routes must be compiled before Cowboy can use them. The compilation step normalizes the routes to simplify the code and speed up the execution, but the routes are still looked up one by one in the end. Faster compilation strategies could be to compile the routes directly to Erlang code, but would require heavier dependencies.</p>
+<p>To compile routes, just call the appropriate function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+    <i><font color="#9A1900">%% {HostMatch, list({PathMatch, Handler, InitialState})}</font></i>
+    {<font color="#FF6600">'_'</font>, [{<font color="#FF6600">'_'</font>, <font color="#FF6600">my_handler</font>, #{}}]}
+]),
+<i><font color="#9A1900">%% Name, TransOpts, ProtoOpts</font></i>
+<b><font color="#000000">cowboy:start_clear</font></b>(<font color="#FF6600">my_http_listener</font>,
+    [{<font color="#FF6600">port</font>, <font color="#993399">8080</font>}],
+    #{<font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}}
+)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_using_persistent_term">Using persistent_term</h2>
+<p>The routes can be stored in <code>persistent_term</code> starting from Erlang/OTP 21.2. This may give a performance improvement when there are a large number of routes.</p>
+<p>To use this functionality you need to compile the routes, store them in <code>persistent_term</code> and then inform Cowboy:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+    {<font color="#FF6600">'_'</font>, [{<font color="#FF6600">'_'</font>, <font color="#FF6600">my_handler</font>, #{}}]}
+]),
+<b><font color="#000000">persistent_term:put</font></b>(<font color="#FF6600">my_app_dispatch</font>, <font color="#009900">Dispatch</font>),
+<b><font color="#000000">cowboy:start_clear</font></b>(<font color="#FF6600">my_http_listener</font>,
+    [{<font color="#FF6600">port</font>, <font color="#993399">8080</font>}],
+    #{<font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> {<font color="#FF6600">persistent_term</font>, <font color="#FF6600">my_app_dispatch</font>}}}
+)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_live_update">Live update</h2>
+<p>You can use the <code>cowboy:set_env/3</code> function for updating the dispatch list used by routing. This will apply to all new connections accepted by the listener:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>(<font color="#009900">Routes</font>),
+<b><font color="#000000">cowboy:set_env</font></b>(<font color="#FF6600">my_http_listener</font>, <font color="#FF6600">dispatch</font>, <font color="#009900">Dispatch</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Note that you need to compile the routes again before updating.</p>
+<p>When using <code>persistent_term</code> there is no need to call this function, you can simply put the new routes in the storage.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/listeners/">
+					Listeners
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/constraints/">
+					Constraints
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+
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+</div>
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+
+      <footer>
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+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+
diff --git a/docs/en/cowboy/2.13/guide/specs.asciidoc b/docs/en/cowboy/2.13/guide/specs.asciidoc
new file mode 100644
index 00000000..14736b3e
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/specs.asciidoc
@@ -0,0 +1,215 @@
+[appendix]
+== HTTP and other specifications
+
+This chapter intends to list all the specification documents
+for or related to HTTP.
+
+=== HTTP
+
+==== IANA Registries
+
+* https://www.iana.org/assignments/http-methods/http-methods.xhtml[HTTP Method Registry]
+* https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml[HTTP Status Code Registry]
+* https://www.iana.org/assignments/message-headers/message-headers.xhtml[Message Headers]
+* https://www.iana.org/assignments/http-parameters/http-parameters.xhtml[HTTP Parameters]
+* https://www.iana.org/assignments/http-alt-svc-parameters/http-alt-svc-parameters.xhtml[HTTP Alt-Svc Parameter Registry]
+* https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml[HTTP Authentication Scheme Registry]
+* https://www.iana.org/assignments/http-cache-directives/http-cache-directives.xhtml[HTTP Cache Directive Registry]
+* https://www.iana.org/assignments/http-dig-alg/http-dig-alg.xhtml[HTTP Digest Algorithm Values]
+* https://www.iana.org/assignments/hoba-device-identifiers/hoba-device-identifiers.xhtml[HTTP Origin-Bound Authentication Device Identifier Types]
+* https://www.iana.org/assignments/http-upgrade-tokens/http-upgrade-tokens.xhtml[HTTP Upgrade Token Registry]
+* https://www.iana.org/assignments/http-warn-codes/http-warn-codes.xhtml[HTTP Warn Codes]
+* https://www.iana.org/assignments/http2-parameters/http2-parameters.xhtml[HTTP/2 Parameters]
+* https://www.ietf.org/assignments/websocket/websocket.xml[WebSocket Protocol Registries]
+
+==== Current
+
+* http://www.w3.org/TR/cors/[CORS]: Cross-Origin Resource Sharing
+* http://www.w3.org/TR/CSP2/[CSP2]: Content Security Policy Level 2
+* http://www.w3.org/TR/tracking-dnt/[DNT]: Tracking Preference Expression (DNT)
+* http://www.w3.org/TR/eventsource/[eventsource]: Server-Sent Events
+* https://www.w3.org/TR/html4/interact/forms.html#h-17.13.4[Form content types]: Form content types
+* https://www.w3.org/TR/preload/[Preload]: Preload
+* https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt[PROXY]: The PROXY protocol
+* http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm[REST]: Fielding's Dissertation
+* https://tools.ietf.org/html/rfc1945[RFC 1945]: HTTP/1.0
+* https://tools.ietf.org/html/rfc1951[RFC 1951]: DEFLATE Compressed Data Format Specification version 1.3
+* https://tools.ietf.org/html/rfc1952[RFC 1952]: GZIP file format specification version 4.3
+* https://tools.ietf.org/html/rfc2046#section-5.1[RFC 2046]: Multipart media type (in MIME Part Two: Media Types)
+* https://tools.ietf.org/html/rfc2295[RFC 2295]: Transparent Content Negotiation in HTTP
+* https://tools.ietf.org/html/rfc2296[RFC 2296]: HTTP Remote Variant Selection Algorithm: RVSA/1.0
+* https://tools.ietf.org/html/rfc2817[RFC 2817]: Upgrading to TLS Within HTTP/1.1
+* https://tools.ietf.org/html/rfc2818[RFC 2818]: HTTP Over TLS
+* https://tools.ietf.org/html/rfc3230[RFC 3230]: Instance Digests in HTTP
+* https://tools.ietf.org/html/rfc4559[RFC 4559]: SPNEGO-based Kerberos and NTLM HTTP Authentication in Microsoft Windows
+* https://tools.ietf.org/html/rfc5789[RFC 5789]: PATCH Method for HTTP
+* https://tools.ietf.org/html/rfc5843[RFC 5843]: Additional Hash Algorithms for HTTP Instance Digests
+* https://tools.ietf.org/html/rfc5861[RFC 5861]: HTTP Cache-Control Extensions for Stale Content
+* https://tools.ietf.org/html/rfc6265[RFC 6265]: HTTP State Management Mechanism
+* https://tools.ietf.org/html/rfc6266[RFC 6266]: Use of the Content-Disposition Header Field
+* https://tools.ietf.org/html/rfc6454[RFC 6454]: The Web Origin Concept
+* https://tools.ietf.org/html/rfc6455[RFC 6455]: The WebSocket Protocol
+* https://tools.ietf.org/html/rfc6585[RFC 6585]: Additional HTTP Status Codes
+* https://tools.ietf.org/html/rfc6750[RFC 6750]: The OAuth 2.0 Authorization Framework: Bearer Token Usage
+* https://tools.ietf.org/html/rfc6797[RFC 6797]: HTTP Strict Transport Security (HSTS)
+* https://tools.ietf.org/html/rfc6903[RFC 6903]: Additional Link Relation Types
+* https://tools.ietf.org/html/rfc7034[RFC 7034]: HTTP Header Field X-Frame-Options
+* https://tools.ietf.org/html/rfc7089[RFC 7089]: Time-Based Access to Resource States: Memento
+* https://tools.ietf.org/html/rfc7230[RFC 7230]: HTTP/1.1 Message Syntax and Routing
+* https://tools.ietf.org/html/rfc7231[RFC 7231]: HTTP/1.1 Semantics and Content
+* https://tools.ietf.org/html/rfc7232[RFC 7232]: HTTP/1.1 Conditional Requests
+* https://tools.ietf.org/html/rfc7233[RFC 7233]: HTTP/1.1 Range Requests
+* https://tools.ietf.org/html/rfc7234[RFC 7234]: HTTP/1.1 Caching
+* https://tools.ietf.org/html/rfc7235[RFC 7235]: HTTP/1.1 Authentication
+* https://tools.ietf.org/html/rfc7239[RFC 7239]: Forwarded HTTP Extension
+* https://tools.ietf.org/html/rfc7240[RFC 7240]: Prefer Header for HTTP
+* https://tools.ietf.org/html/rfc7469[RFC 7469]: Public Key Pinning Extension for HTTP
+* https://tools.ietf.org/html/rfc7486[RFC 7486]: HTTP Origin-Bound Authentication (HOBA)
+* https://tools.ietf.org/html/rfc7538[RFC 7538]: HTTP Status Code 308 (Permanent Redirect)
+* https://tools.ietf.org/html/rfc7540[RFC 7540]: Hypertext Transfer Protocol Version 2 (HTTP/2)
+* https://tools.ietf.org/html/rfc7541[RFC 7541]: HPACK: Header Compression for HTTP/2
+* https://tools.ietf.org/html/rfc7578[RFC 7578]: Returning Values from Forms: multipart/form-data
+* https://tools.ietf.org/html/rfc7615[RFC 7615]: HTTP Authentication-Info and Proxy-Authentication-Info Response Header Fields
+* https://tools.ietf.org/html/rfc7616[RFC 7616]: HTTP Digest Access Authentication
+* https://tools.ietf.org/html/rfc7617[RFC 7617]: The 'Basic' HTTP Authentication Scheme
+* https://tools.ietf.org/html/rfc7639[RFC 7639]: The ALPN HTTP Header Field
+* https://tools.ietf.org/html/rfc7692[RFC 7692]: Compression Extensions for WebSocket
+* https://tools.ietf.org/html/rfc7694[RFC 7694]: HTTP Client-Initiated Content-Encoding
+* https://tools.ietf.org/html/rfc7725[RFC 7725]: An HTTP Status Code to Report Legal Obstacles
+* https://tools.ietf.org/html/rfc7804[RFC 7804]: Salted Challenge Response HTTP Authentication Mechanism
+* https://tools.ietf.org/html/rfc7838[RFC 7838]: HTTP Alternative Services
+* https://tools.ietf.org/html/rfc7932[RFC 7932]: Brotli Compressed Data Format
+* https://tools.ietf.org/html/rfc7936[RFC 7936]: Clarifying Registry Procedures for the WebSocket Subprotocol Name Registry
+* https://tools.ietf.org/html/rfc8053[RFC 8053]: HTTP Authentication Extensions for Interactive Clients
+* https://tools.ietf.org/html/rfc8164[RFC 8164]: Opportunistic Security for HTTP/2
+* https://tools.ietf.org/html/rfc8187[RFC 8187]: Indicating Character Encoding and Language for HTTP Header Field Parameters
+* https://tools.ietf.org/html/rfc8188[RFC 8188]: Encrypted Content-Encoding for HTTP
+* https://tools.ietf.org/html/rfc8246[RFC 8246]: HTTP Immutable Responses
+* https://tools.ietf.org/html/rfc8288[RFC 8288]: Web Linking
+* https://tools.ietf.org/html/rfc8297[RFC 8297]: An HTTP Status Code for Indicating Hints
+* https://tools.ietf.org/html/rfc8336[RFC 8336]: The ORIGIN HTTP/2 Frame
+* https://tools.ietf.org/html/rfc8441[RFC 8441]: Bootstrapping WebSockets with HTTP/2
+* https://tools.ietf.org/html/rfc8470[RFC 8470]: Using Early Data in HTTP
+* https://tools.ietf.org/html/rfc8473[RFC 8473]: Token Binding over HTTP
+* https://tools.ietf.org/html/rfc8586[RFC 8586]: Loop Detection in Content Delivery Networks (CDNs)
+* https://tools.ietf.org/html/rfc8594[RFC 8594]: The Sunset HTTP Header Field
+* https://tools.ietf.org/html/rfc8673[RFC 8673]: HTTP Random Access and Live Content
+* https://tools.ietf.org/html/rfc8674[RFC 8674]: The "safe" HTTP Preference
+* https://tools.ietf.org/html/rfc8740[RFC 8740]: Using TLS 1.3 with HTTP/2
+* https://tools.ietf.org/html/rfc8941[RFC 8941]: Structured Field Values for HTTP
+* https://tools.ietf.org/html/rfc8942[RFC 8942]: HTTP Client Hints
+* https://www.w3.org/TR/trace-context/[Trace Context]: Trace Context
+* https://www.w3.org/TR/webmention/[Webmention]: Webmention
+
+==== Upcoming
+
+* https://www.w3.org/TR/clear-site-data/[Clear Site Data]
+* https://www.w3.org/TR/csp-cookies/[Content Security Policy: Cookie Controls]
+* https://www.w3.org/TR/csp-embedded-enforcement/[Content Security Policy: Embedded Enforcement]
+* https://www.w3.org/TR/CSP3/[Content Security Policy Level 3]
+* https://www.w3.org/TR/csp-pinning/[Content Security Policy Pinning]
+* http://www.w3.org/TR/referrer-policy/[Referrer Policy]
+* http://www.w3.org/TR/UISecurity/[User Interface Security Directives for Content Security Policy]
+
+==== Informative
+
+* http://www.w3.org/TR/webarch/[Architecture of the World Wide Web]
+* https://tools.ietf.org/html/rfc2936[RFC 2936]: HTTP MIME Type Handler Detection
+* https://tools.ietf.org/html/rfc2964[RFC 2964]: Use of HTTP State Management
+* https://tools.ietf.org/html/rfc3143[RFC 3143]: Known HTTP Proxy/Caching Problems
+* https://tools.ietf.org/html/rfc6202[RFC 6202]: Known Issues and Best Practices for the Use of Long Polling and Streaming in Bidirectional HTTP
+* https://tools.ietf.org/html/rfc6838[RFC 6838]: Media Type Specifications and Registration Procedures
+* https://tools.ietf.org/html/rfc7478[RFC 7478]: Web Real-Time Communication Use Cases and Requirements
+
+==== Related
+
+* http://www.w3.org/TR/app-uri/[app: URL Scheme]
+* http://www.w3.org/TR/beacon/[Beacon]
+* http://www.w3.org/TR/FileAPI/[File API]
+* https://tools.ietf.org/html/rfc8030[Generic Event Delivery Using HTTP Push]
+* http://www.w3.org/TR/capability-urls/[Good Practices for Capability URLs]
+* https://html.spec.whatwg.org/multipage/[HTML Living Standard]
+* https://developers.whatwg.org/[HTML Living Standard for Web developers]
+* http://www.w3.org/TR/html401/[HTML4.01]
+* http://www.w3.org/TR/html5/[HTML5]
+* http://www.w3.org/TR/html51/[HTML5.1]
+* https://www.w3.org/TR/html52/[HTML5.2]
+* http://www.w3.org/TR/media-frags/[Media Fragments URI 1.0]
+* https://tools.ietf.org/html/rfc5829[RFC 5829]: Link Relation Types for Simple Version Navigation between Web Resources
+* https://tools.ietf.org/html/rfc6657[RFC 6657]: Update to MIME regarding "charset" Parameter Handling in Textual Media Types
+* https://tools.ietf.org/html/rfc6690[RFC 6690]: Constrained RESTful Environments (CoRE) Link Format
+* https://tools.ietf.org/html/rfc7807[RFC 7807]: Problem Details for HTTP APIs
+* https://tools.ietf.org/html/rfc6906[RFC 6906]: The 'profile' Link Relation Type
+* https://tools.ietf.org/html/rfc8631[RFC 8631]: Link Relation Types for Web Services
+* http://www.w3.org/TR/SRI/[Subresource Integrity]
+* http://www.w3.org/TR/tracking-compliance/[Tracking Compliance and Scope]
+* http://www.w3.org/TR/media-frags-reqs/[Use cases and requirements for Media Fragments]
+* http://www.w3.org/TR/webrtc/[WebRTC 1.0: Real-time Communication Between Browsers]
+* http://www.w3.org/TR/websockets/[Websocket API]
+* http://www.w3.org/TR/XMLHttpRequest/[XMLHttpRequest Level 1]
+* https://xhr.spec.whatwg.org/[XMLHttpRequest Living Standard]
+
+==== Seemingly obsolete
+
+* https://tools.ietf.org/html/rfc2227[RFC 2227]: Simple Hit-Metering and Usage-Limiting for HTTP
+* https://tools.ietf.org/html/rfc2310[RFC 2310]: The Safe Response Header Field
+* https://tools.ietf.org/html/rfc2324[RFC 2324]: Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0)
+* https://tools.ietf.org/html/rfc2660[RFC 2660]: The Secure HyperText Transfer Protocol
+* https://tools.ietf.org/html/rfc2774[RFC 2774]: An HTTP Extension Framework
+* https://tools.ietf.org/html/rfc2965[RFC 2965]: HTTP State Management Mechanism (Cookie2)
+* https://tools.ietf.org/html/rfc3229[RFC 3229]: Delta encoding in HTTP
+* https://tools.ietf.org/html/rfc7168[RFC 7168]: The Hyper Text Coffee Pot Control Protocol for Tea Efflux Appliances (HTCPCP-TEA)
+* https://tools.ietf.org/html/rfc8565[RFC 8565]: Hypertext Jeopardy Protocol (HTJP/1.0)
+* http://dev.chromium.org/spdy/spdy-protocol[SPDY]: SPDY Protocol
+* https://tools.ietf.org/html/draft-tyoshino-hybi-websocket-perframe-deflate-06[x-webkit-deflate-frame]: Deprecated Websocket compression
+
+=== URL
+
+* https://tools.ietf.org/html/rfc3986[RFC 3986]: URI Generic Syntax
+* https://tools.ietf.org/html/rfc6570[RFC 6570]: URI Template
+* https://tools.ietf.org/html/rfc6874[RFC 6874]: Representing IPv6 Zone Identifiers in Address Literals and URIs
+* https://tools.ietf.org/html/rfc7320[RFC 7320]: URI Design and Ownership
+* https://tools.ietf.org/html/rfc8615[RFC 8615]: Well-Known URIs
+* http://www.w3.org/TR/url-1/[URL]
+* https://url.spec.whatwg.org/[URL Living Standard]
+
+=== WebDAV
+
+* https://tools.ietf.org/html/rfc3253[RFC 3253]: Versioning Extensions to WebDAV
+* https://tools.ietf.org/html/rfc3648[RFC 3648]: WebDAV Ordered Collections Protocol
+* https://tools.ietf.org/html/rfc3744[RFC 3744]: WebDAV Access Control Protocol
+* https://tools.ietf.org/html/rfc4316[RFC 4316]: Datatypes for WebDAV Properties
+* https://tools.ietf.org/html/rfc4331[RFC 4331]: Quota and Size Properties for DAV Collections
+* https://tools.ietf.org/html/rfc4437[RFC 4437]: WebDAV Redirect Reference Resources
+* https://tools.ietf.org/html/rfc4709[RFC 4709]: Mounting WebDAV Servers
+* https://tools.ietf.org/html/rfc4791[RFC 4791]: Calendaring Extensions to WebDAV (CalDAV)
+* https://tools.ietf.org/html/rfc4918[RFC 4918]: HTTP Extensions for WebDAV
+* https://tools.ietf.org/html/rfc5323[RFC 5323]: WebDAV SEARCH
+* https://tools.ietf.org/html/rfc5397[RFC 5397]: WebDAV Current Principal Extension
+* https://tools.ietf.org/html/rfc5689[RFC 5689]: Extended MKCOL for WebDAV
+* https://tools.ietf.org/html/rfc5842[RFC 5842]: Binding Extensions to WebDAV
+* https://tools.ietf.org/html/rfc5995[RFC 5995]: Using POST to Add Members to WebDAV Collections
+* https://tools.ietf.org/html/rfc6352[RFC 6352]: CardDAV: vCard Extensions to WebDAV
+* https://tools.ietf.org/html/rfc6578[RFC 6578]: Collection Synchronization for WebDAV
+* https://tools.ietf.org/html/rfc6638[RFC 6638]: Scheduling Extensions to CalDAV
+* https://tools.ietf.org/html/rfc6764[RFC 6764]: Locating Services for Calendaring Extensions to WebDAV (CalDAV) and vCard Extensions to WebDAV (CardDAV)
+* https://tools.ietf.org/html/rfc7809[RFC 7809]: Calendaring Extensions to WebDAV (CalDAV): Time Zones by Reference
+* https://tools.ietf.org/html/rfc7953[RFC 7953]: Calendar Availability
+* https://tools.ietf.org/html/rfc8144[RFC 8144]: Use of the Prefer Header Field in WebDAV
+* https://tools.ietf.org/html/rfc8607[RFC 8607]: Calendaring Extensions to WebDAV (CalDAV): Managed Attachments
+
+=== CoAP
+
+* https://tools.ietf.org/html/rfc7252[RFC 7252]: The Constrained Application Protocol (CoAP)
+* https://tools.ietf.org/html/rfc7390[RFC 7390]: Group Communication for CoAP
+* https://tools.ietf.org/html/rfc7641[RFC 7641]: Observing Resources in CoAP
+* https://tools.ietf.org/html/rfc7650[RFC 7650]: A CoAP Usage for REsource LOcation And Discovery (RELOAD)
+* https://tools.ietf.org/html/rfc7959[RFC 7959]: Block-Wise Transfers in CoAP
+* https://tools.ietf.org/html/rfc7967[RFC 7967]: CoAP Option for No Server Response
+* https://tools.ietf.org/html/rfc8075[RFC 8075]: Guidelines for Mapping Implementations: HTTP to CoAP
+* https://tools.ietf.org/html/rfc8132[RFC 8132]: PATCH and FETCH Methods for CoAP
+* https://tools.ietf.org/html/rfc8323[RFC 8323]: CoAP over TCP, TLS, and WebSockets
+* https://tools.ietf.org/html/rfc8516[RFC 8516]: "Too Many Requests" Response Code for CoAP
+* https://tools.ietf.org/html/rfc8613[RFC 8613]: Object Security for Constrained RESTful Environments
+* https://tools.ietf.org/html/rfc8710[RFC 8710]: Multipart Content-Format for CoAP
+* https://tools.ietf.org/html/rfc8768[RFC 8768]: CoAP Hop-Limit Option
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+    <title>Nine Nines: HTTP and other specifications</title>
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+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
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+<div id="contents" class="two_col">
+<div class="container">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>HTTP and other specifications</span></h1>
+
+<p>This chapter intends to list all the specification documents for or related to HTTP.</p>
+<h2 id="_http">HTTP</h2>
+<h4 id="_iana_registries">IANA Registries</h4>
+<ul><li><a href="https://www.iana.org/assignments/http-methods/http-methods.xhtml">HTTP Method Registry</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml">HTTP Status Code Registry</a>
+</li>
+<li><a href="https://www.iana.org/assignments/message-headers/message-headers.xhtml">Message Headers</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-parameters/http-parameters.xhtml">HTTP Parameters</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-alt-svc-parameters/http-alt-svc-parameters.xhtml">HTTP Alt-Svc Parameter Registry</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml">HTTP Authentication Scheme Registry</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-cache-directives/http-cache-directives.xhtml">HTTP Cache Directive Registry</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-dig-alg/http-dig-alg.xhtml">HTTP Digest Algorithm Values</a>
+</li>
+<li><a href="https://www.iana.org/assignments/hoba-device-identifiers/hoba-device-identifiers.xhtml">HTTP Origin-Bound Authentication Device Identifier Types</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-upgrade-tokens/http-upgrade-tokens.xhtml">HTTP Upgrade Token Registry</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http-warn-codes/http-warn-codes.xhtml">HTTP Warn Codes</a>
+</li>
+<li><a href="https://www.iana.org/assignments/http2-parameters/http2-parameters.xhtml">HTTP/2 Parameters</a>
+</li>
+<li><a href="https://www.ietf.org/assignments/websocket/websocket.xml">WebSocket Protocol Registries</a>
+</li>
+</ul>
+<h4 id="_current">Current</h4>
+<ul><li><a href="http://www.w3.org/TR/cors/">CORS</a>: Cross-Origin Resource Sharing
+</li>
+<li><a href="http://www.w3.org/TR/CSP2/">CSP2</a>: Content Security Policy Level 2
+</li>
+<li><a href="http://www.w3.org/TR/tracking-dnt/">DNT</a>: Tracking Preference Expression (DNT)
+</li>
+<li><a href="http://www.w3.org/TR/eventsource/">eventsource</a>: Server-Sent Events
+</li>
+<li><a href="https://www.w3.org/TR/html4/interact/forms.html#h-17.13.4">Form content types</a>: Form content types
+</li>
+<li><a href="https://www.w3.org/TR/preload/">Preload</a>: Preload
+</li>
+<li><a href="https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt">PROXY</a>: The PROXY protocol
+</li>
+<li><a href="http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm">REST</a>: Fielding&apos;s Dissertation
+</li>
+<li><a href="https://tools.ietf.org/html/rfc1945">RFC 1945</a>: HTTP/1.0
+</li>
+<li><a href="https://tools.ietf.org/html/rfc1951">RFC 1951</a>: DEFLATE Compressed Data Format Specification version 1.3
+</li>
+<li><a href="https://tools.ietf.org/html/rfc1952">RFC 1952</a>: GZIP file format specification version 4.3
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2046#section-5.1">RFC 2046</a>: Multipart media type (in MIME Part Two: Media Types)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2295">RFC 2295</a>: Transparent Content Negotiation in HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2296">RFC 2296</a>: HTTP Remote Variant Selection Algorithm: RVSA/1.0
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2817">RFC 2817</a>: Upgrading to TLS Within HTTP/1.1
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2818">RFC 2818</a>: HTTP Over TLS
+</li>
+<li><a href="https://tools.ietf.org/html/rfc3230">RFC 3230</a>: Instance Digests in HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc4559">RFC 4559</a>: SPNEGO-based Kerberos and NTLM HTTP Authentication in Microsoft Windows
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5789">RFC 5789</a>: PATCH Method for HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5843">RFC 5843</a>: Additional Hash Algorithms for HTTP Instance Digests
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5861">RFC 5861</a>: HTTP Cache-Control Extensions for Stale Content
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6265">RFC 6265</a>: HTTP State Management Mechanism
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6266">RFC 6266</a>: Use of the Content-Disposition Header Field
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6454">RFC 6454</a>: The Web Origin Concept
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6455">RFC 6455</a>: The WebSocket Protocol
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6585">RFC 6585</a>: Additional HTTP Status Codes
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6750">RFC 6750</a>: The OAuth 2.0 Authorization Framework: Bearer Token Usage
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6797">RFC 6797</a>: HTTP Strict Transport Security (HSTS)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6903">RFC 6903</a>: Additional Link Relation Types
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7034">RFC 7034</a>: HTTP Header Field X-Frame-Options
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7089">RFC 7089</a>: Time-Based Access to Resource States: Memento
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7230">RFC 7230</a>: HTTP/1.1 Message Syntax and Routing
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7231">RFC 7231</a>: HTTP/1.1 Semantics and Content
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7232">RFC 7232</a>: HTTP/1.1 Conditional Requests
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7233">RFC 7233</a>: HTTP/1.1 Range Requests
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7234">RFC 7234</a>: HTTP/1.1 Caching
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7235">RFC 7235</a>: HTTP/1.1 Authentication
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7239">RFC 7239</a>: Forwarded HTTP Extension
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7240">RFC 7240</a>: Prefer Header for HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7469">RFC 7469</a>: Public Key Pinning Extension for HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7486">RFC 7486</a>: HTTP Origin-Bound Authentication (HOBA)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7538">RFC 7538</a>: HTTP Status Code 308 (Permanent Redirect)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7540">RFC 7540</a>: Hypertext Transfer Protocol Version 2 (HTTP/2)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7541">RFC 7541</a>: HPACK: Header Compression for HTTP/2
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7578">RFC 7578</a>: Returning Values from Forms: multipart/form-data
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7615">RFC 7615</a>: HTTP Authentication-Info and Proxy-Authentication-Info Response Header Fields
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7616">RFC 7616</a>: HTTP Digest Access Authentication
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7617">RFC 7617</a>: The <em>Basic</em> HTTP Authentication Scheme
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7639">RFC 7639</a>: The ALPN HTTP Header Field
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7692">RFC 7692</a>: Compression Extensions for WebSocket
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7694">RFC 7694</a>: HTTP Client-Initiated Content-Encoding
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7725">RFC 7725</a>: An HTTP Status Code to Report Legal Obstacles
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7804">RFC 7804</a>: Salted Challenge Response HTTP Authentication Mechanism
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7838">RFC 7838</a>: HTTP Alternative Services
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7932">RFC 7932</a>: Brotli Compressed Data Format
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7936">RFC 7936</a>: Clarifying Registry Procedures for the WebSocket Subprotocol Name Registry
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8053">RFC 8053</a>: HTTP Authentication Extensions for Interactive Clients
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8164">RFC 8164</a>: Opportunistic Security for HTTP/2
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8187">RFC 8187</a>: Indicating Character Encoding and Language for HTTP Header Field Parameters
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8188">RFC 8188</a>: Encrypted Content-Encoding for HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8246">RFC 8246</a>: HTTP Immutable Responses
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8288">RFC 8288</a>: Web Linking
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8297">RFC 8297</a>: An HTTP Status Code for Indicating Hints
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8336">RFC 8336</a>: The ORIGIN HTTP/2 Frame
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8441">RFC 8441</a>: Bootstrapping WebSockets with HTTP/2
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8470">RFC 8470</a>: Using Early Data in HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8473">RFC 8473</a>: Token Binding over HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8586">RFC 8586</a>: Loop Detection in Content Delivery Networks (CDNs)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8594">RFC 8594</a>: The Sunset HTTP Header Field
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8673">RFC 8673</a>: HTTP Random Access and Live Content
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8674">RFC 8674</a>: The &quot;safe&quot; HTTP Preference
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8740">RFC 8740</a>: Using TLS 1.3 with HTTP/2
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8941">RFC 8941</a>: Structured Field Values for HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8942">RFC 8942</a>: HTTP Client Hints
+</li>
+<li><a href="https://www.w3.org/TR/trace-context/">Trace Context</a>: Trace Context
+</li>
+<li><a href="https://www.w3.org/TR/webmention/">Webmention</a>: Webmention
+</li>
+</ul>
+<h4 id="_upcoming">Upcoming</h4>
+<ul><li><a href="https://www.w3.org/TR/clear-site-data/">Clear Site Data</a>
+</li>
+<li><a href="https://www.w3.org/TR/csp-cookies/">Content Security Policy: Cookie Controls</a>
+</li>
+<li><a href="https://www.w3.org/TR/csp-embedded-enforcement/">Content Security Policy: Embedded Enforcement</a>
+</li>
+<li><a href="https://www.w3.org/TR/CSP3/">Content Security Policy Level 3</a>
+</li>
+<li><a href="https://www.w3.org/TR/csp-pinning/">Content Security Policy Pinning</a>
+</li>
+<li><a href="http://www.w3.org/TR/referrer-policy/">Referrer Policy</a>
+</li>
+<li><a href="http://www.w3.org/TR/UISecurity/">User Interface Security Directives for Content Security Policy</a>
+</li>
+</ul>
+<h4 id="_informative">Informative</h4>
+<ul><li><a href="http://www.w3.org/TR/webarch/">Architecture of the World Wide Web</a>
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2936">RFC 2936</a>: HTTP MIME Type Handler Detection
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2964">RFC 2964</a>: Use of HTTP State Management
+</li>
+<li><a href="https://tools.ietf.org/html/rfc3143">RFC 3143</a>: Known HTTP Proxy/Caching Problems
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6202">RFC 6202</a>: Known Issues and Best Practices for the Use of Long Polling and Streaming in Bidirectional HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6838">RFC 6838</a>: Media Type Specifications and Registration Procedures
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7478">RFC 7478</a>: Web Real-Time Communication Use Cases and Requirements
+</li>
+</ul>
+<h4 id="_related">Related</h4>
+<ul><li><a href="http://www.w3.org/TR/app-uri/">app: URL Scheme</a>
+</li>
+<li><a href="http://www.w3.org/TR/beacon/">Beacon</a>
+</li>
+<li><a href="http://www.w3.org/TR/FileAPI/">File API</a>
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8030">Generic Event Delivery Using HTTP Push</a>
+</li>
+<li><a href="http://www.w3.org/TR/capability-urls/">Good Practices for Capability URLs</a>
+</li>
+<li><a href="https://html.spec.whatwg.org/multipage/">HTML Living Standard</a>
+</li>
+<li><a href="https://developers.whatwg.org/">HTML Living Standard for Web developers</a>
+</li>
+<li><a href="http://www.w3.org/TR/html401/">HTML4.01</a>
+</li>
+<li><a href="http://www.w3.org/TR/html5/">HTML5</a>
+</li>
+<li><a href="http://www.w3.org/TR/html51/">HTML5.1</a>
+</li>
+<li><a href="https://www.w3.org/TR/html52/">HTML5.2</a>
+</li>
+<li><a href="http://www.w3.org/TR/media-frags/">Media Fragments URI 1.0</a>
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5829">RFC 5829</a>: Link Relation Types for Simple Version Navigation between Web Resources
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6657">RFC 6657</a>: Update to MIME regarding &quot;charset&quot; Parameter Handling in Textual Media Types
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6690">RFC 6690</a>: Constrained RESTful Environments (CoRE) Link Format
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7807">RFC 7807</a>: Problem Details for HTTP APIs
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6906">RFC 6906</a>: The <em>profile</em> Link Relation Type
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8631">RFC 8631</a>: Link Relation Types for Web Services
+</li>
+<li><a href="http://www.w3.org/TR/SRI/">Subresource Integrity</a>
+</li>
+<li><a href="http://www.w3.org/TR/tracking-compliance/">Tracking Compliance and Scope</a>
+</li>
+<li><a href="http://www.w3.org/TR/media-frags-reqs/">Use cases and requirements for Media Fragments</a>
+</li>
+<li><a href="http://www.w3.org/TR/webrtc/">WebRTC 1.0: Real-time Communication Between Browsers</a>
+</li>
+<li><a href="http://www.w3.org/TR/websockets/">Websocket API</a>
+</li>
+<li><a href="http://www.w3.org/TR/XMLHttpRequest/">XMLHttpRequest Level 1</a>
+</li>
+<li><a href="https://xhr.spec.whatwg.org/">XMLHttpRequest Living Standard</a>
+</li>
+</ul>
+<h4 id="_seemingly_obsolete">Seemingly obsolete</h4>
+<ul><li><a href="https://tools.ietf.org/html/rfc2227">RFC 2227</a>: Simple Hit-Metering and Usage-Limiting for HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2310">RFC 2310</a>: The Safe Response Header Field
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2324">RFC 2324</a>: Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2660">RFC 2660</a>: The Secure HyperText Transfer Protocol
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2774">RFC 2774</a>: An HTTP Extension Framework
+</li>
+<li><a href="https://tools.ietf.org/html/rfc2965">RFC 2965</a>: HTTP State Management Mechanism (Cookie2)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc3229">RFC 3229</a>: Delta encoding in HTTP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7168">RFC 7168</a>: The Hyper Text Coffee Pot Control Protocol for Tea Efflux Appliances (HTCPCP-TEA)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8565">RFC 8565</a>: Hypertext Jeopardy Protocol (HTJP/1.0)
+</li>
+<li><a href="http://dev.chromium.org/spdy/spdy-protocol">SPDY</a>: SPDY Protocol
+</li>
+<li><a href="https://tools.ietf.org/html/draft-tyoshino-hybi-websocket-perframe-deflate-06">x-webkit-deflate-frame</a>: Deprecated Websocket compression
+</li>
+</ul>
+<h2 id="_url">URL</h2>
+<ul><li><a href="https://tools.ietf.org/html/rfc3986">RFC 3986</a>: URI Generic Syntax
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6570">RFC 6570</a>: URI Template
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6874">RFC 6874</a>: Representing IPv6 Zone Identifiers in Address Literals and URIs
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7320">RFC 7320</a>: URI Design and Ownership
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8615">RFC 8615</a>: Well-Known URIs
+</li>
+<li><a href="http://www.w3.org/TR/url-1/">URL</a>
+</li>
+<li><a href="https://url.spec.whatwg.org/">URL Living Standard</a>
+</li>
+</ul>
+<h2 id="_webdav">WebDAV</h2>
+<ul><li><a href="https://tools.ietf.org/html/rfc3253">RFC 3253</a>: Versioning Extensions to WebDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc3648">RFC 3648</a>: WebDAV Ordered Collections Protocol
+</li>
+<li><a href="https://tools.ietf.org/html/rfc3744">RFC 3744</a>: WebDAV Access Control Protocol
+</li>
+<li><a href="https://tools.ietf.org/html/rfc4316">RFC 4316</a>: Datatypes for WebDAV Properties
+</li>
+<li><a href="https://tools.ietf.org/html/rfc4331">RFC 4331</a>: Quota and Size Properties for DAV Collections
+</li>
+<li><a href="https://tools.ietf.org/html/rfc4437">RFC 4437</a>: WebDAV Redirect Reference Resources
+</li>
+<li><a href="https://tools.ietf.org/html/rfc4709">RFC 4709</a>: Mounting WebDAV Servers
+</li>
+<li><a href="https://tools.ietf.org/html/rfc4791">RFC 4791</a>: Calendaring Extensions to WebDAV (CalDAV)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc4918">RFC 4918</a>: HTTP Extensions for WebDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5323">RFC 5323</a>: WebDAV SEARCH
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5397">RFC 5397</a>: WebDAV Current Principal Extension
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5689">RFC 5689</a>: Extended MKCOL for WebDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5842">RFC 5842</a>: Binding Extensions to WebDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc5995">RFC 5995</a>: Using POST to Add Members to WebDAV Collections
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6352">RFC 6352</a>: CardDAV: vCard Extensions to WebDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6578">RFC 6578</a>: Collection Synchronization for WebDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6638">RFC 6638</a>: Scheduling Extensions to CalDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc6764">RFC 6764</a>: Locating Services for Calendaring Extensions to WebDAV (CalDAV) and vCard Extensions to WebDAV (CardDAV)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7809">RFC 7809</a>: Calendaring Extensions to WebDAV (CalDAV): Time Zones by Reference
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7953">RFC 7953</a>: Calendar Availability
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8144">RFC 8144</a>: Use of the Prefer Header Field in WebDAV
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8607">RFC 8607</a>: Calendaring Extensions to WebDAV (CalDAV): Managed Attachments
+</li>
+</ul>
+<h2 id="_coap">CoAP</h2>
+<ul><li><a href="https://tools.ietf.org/html/rfc7252">RFC 7252</a>: The Constrained Application Protocol (CoAP)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7390">RFC 7390</a>: Group Communication for CoAP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7641">RFC 7641</a>: Observing Resources in CoAP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7650">RFC 7650</a>: A CoAP Usage for REsource LOcation And Discovery (RELOAD)
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7959">RFC 7959</a>: Block-Wise Transfers in CoAP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc7967">RFC 7967</a>: CoAP Option for No Server Response
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8075">RFC 8075</a>: Guidelines for Mapping Implementations: HTTP to CoAP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8132">RFC 8132</a>: PATCH and FETCH Methods for CoAP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8323">RFC 8323</a>: CoAP over TCP, TLS, and WebSockets
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8516">RFC 8516</a>: &quot;Too Many Requests&quot; Response Code for CoAP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8613">RFC 8613</a>: Object Security for Constrained RESTful Environments
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8710">RFC 8710</a>: Multipart Content-Format for CoAP
+</li>
+<li><a href="https://tools.ietf.org/html/rfc8768">RFC 8768</a>: CoAP Hop-Limit Option
+</li>
+</ul>
+
+
+
+
+	
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+		
+
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+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_1.0/">
+					Migrating from Cowboy 1.0 to 2.0
+				</a>
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+
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+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
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+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
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+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
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diff --git a/docs/en/cowboy/2.13/guide/static_files.asciidoc b/docs/en/cowboy/2.13/guide/static_files.asciidoc
new file mode 100644
index 00000000..5af911be
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/static_files.asciidoc
@@ -0,0 +1,163 @@
+[[static_files]]
+== Static files
+
+Cowboy comes with a ready to use handler for serving static
+files. It is provided as a convenience for serving files
+during development.
+
+For systems in production, consider using one of the many
+Content Distribution Network (CDN) available on the market,
+as they are the best solution for serving files.
+
+The static handler can serve either one file or all files
+from a given directory. The etag generation and mime types
+can be configured.
+
+=== Serve one file
+
+You can use the static handler to serve one specific file
+from an application's private directory. This is particularly
+useful to serve an 'index.html' file when the client requests
+the `/` path, for example. The path configured is relative
+to the given application's private directory.
+
+The following rule will serve the file 'static/index.html'
+from the application `my_app`'s priv directory whenever the
+path `/` is accessed:
+
+[source,erlang]
+{"/", cowboy_static, {priv_file, my_app, "static/index.html"}}
+
+You can also specify the absolute path to a file, or the
+path to the file relative to the current directory:
+
+[source,erlang]
+{"/", cowboy_static, {file, "/var/www/index.html"}}
+
+=== Serve all files from a directory
+
+You can also use the static handler to serve all files that
+can be found in the configured directory. The handler will
+use the `path_info` information to resolve the file location,
+which means that your route must end with a `[...]` pattern
+for it to work. All files are served, including the ones that
+may be found in subfolders.
+
+You can specify the directory relative to the application's
+private directory (e.g. `my_app/priv`).
+
+The following rule will serve any file found in the `my_app`
+application's private directory in the `my_app/priv/static/assets`
+folder whenever the requested path begins with `/assets/`:
+
+[source,erlang]
+{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets"}}
+
+You can also specify the absolute path to the directory or
+set it relative to the current directory:
+
+[source,erlang]
+{"/assets/[...]", cowboy_static, {dir, "/var/www/assets"}}
+
+=== Customize the mimetype detection
+
+By default, Cowboy will attempt to recognize the mimetype
+of your static files by looking at the extension.
+
+You can override the function that figures out the mimetype
+of the static files. It can be useful when Cowboy is missing
+a mimetype you need to handle, or when you want to reduce
+the list to make lookups faster. You can also give a
+hard-coded mimetype that will be used unconditionally.
+
+Cowboy comes with two functions built-in. The default
+function only handles common file types used when building
+Web applications. The other function is an extensive list
+of hundreds of mimetypes that should cover almost any need
+you may have. You can of course create your own function.
+
+To use the default function, you should not have to configure
+anything, as it is the default. If you insist, though, the
+following will do the job:
+
+[source,erlang]
+----
+{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
+    [{mimetypes, cow_mimetypes, web}]}}
+----
+
+As you can see, there is an optional field that may contain
+a list of less used options, like mimetypes or etag. All option
+types have this optional field.
+
+To use the function that will detect almost any mimetype,
+the following configuration will do:
+
+[source,erlang]
+----
+{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
+    [{mimetypes, cow_mimetypes, all}]}}
+----
+
+You probably noticed the pattern by now. The configuration
+expects a module and a function name, so you can use any
+of your own functions instead:
+
+[source,erlang]
+----
+{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
+    [{mimetypes, Module, Function}]}}
+----
+
+The function that performs the mimetype detection receives
+a single argument that is the path to the file on disk. It
+is recommended to return the mimetype in tuple form, although
+a binary string is also allowed (but will require extra
+processing). If the function can't figure out the mimetype,
+then it should return `{<<"application">>, <<"octet-stream">>, []}`.
+
+When the static handler fails to find the extension,
+it will send the file as `application/octet-stream`.
+A browser receiving such file will attempt to download it
+directly to disk.
+
+Finally, the mimetype can be hard-coded for all files.
+This is especially useful in combination with the `file`
+and `priv_file` options as it avoids needless computation:
+
+[source,erlang]
+----
+{"/", cowboy_static, {priv_file, my_app, "static/index.html",
+    [{mimetypes, {<<"text">>, <<"html">>, []}}]}}
+----
+
+=== Generate an etag
+
+By default, the static handler will generate an etag header
+value based on the size and modified time. This solution
+can not be applied to all systems though. It would perform
+rather poorly over a cluster of nodes, for example, as the
+file metadata will vary from server to server, giving a
+different etag on each server.
+
+You can however change the way the etag is calculated:
+
+[source,erlang]
+----
+{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
+    [{etag, Module, Function}]}}
+----
+
+This function will receive three arguments: the path to the
+file on disk, the size of the file and the last modification
+time. In a distributed setup, you would typically use the
+file path to retrieve an etag value that is identical across
+all your servers.
+
+You can also completely disable etag handling:
+
+[source,erlang]
+----
+{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
+    [{etag, false}]}}
+----
diff --git a/docs/en/cowboy/2.13/guide/static_files/index.html b/docs/en/cowboy/2.13/guide/static_files/index.html
new file mode 100644
index 00000000..252ff0df
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/static_files/index.html
@@ -0,0 +1,278 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="contents" class="two_col">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Static files</span></h1>
+
+<p>Cowboy comes with a ready to use handler for serving static files. It is provided as a convenience for serving files during development.</p>
+<p>For systems in production, consider using one of the many Content Distribution Network (CDN) available on the market, as they are the best solution for serving files.</p>
+<p>The static handler can serve either one file or all files from a given directory. The etag generation and mime types can be configured.</p>
+<h2 id="_serve_one_file">Serve one file</h2>
+<p>You can use the static handler to serve one specific file from an application&apos;s private directory. This is particularly useful to serve an <em>index.html</em> file when the client requests the <code>/</code> path, for example. The path configured is relative to the given application&apos;s private directory.</p>
+<p>The following rule will serve the file <em>static/index.html</em> from the application <code>my_app</code>&apos;s priv directory whenever the path <code>/</code> is accessed:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_file</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/index.html"</font>}}</tt></pre>
+</div></div>
+<p>You can also specify the absolute path to a file, or the path to the file relative to the current directory:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">file</font>, <font color="#FF0000">"/var/www/index.html"</font>}}</tt></pre>
+</div></div>
+<h2 id="_serve_all_files_from_a_directory">Serve all files from a directory</h2>
+<p>You can also use the static handler to serve all files that can be found in the configured directory. The handler will use the <code>path_info</code> information to resolve the file location, which means that your route must end with a <code>[...]</code> pattern for it to work. All files are served, including the ones that may be found in subfolders.</p>
+<p>You can specify the directory relative to the application&apos;s private directory (e.g. <code>my_app/priv</code>).</p>
+<p>The following rule will serve any file found in the <code>my_app</code> application&apos;s private directory in the <code>my_app/priv/static/assets</code> folder whenever the requested path begins with <code>/assets/</code>:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/assets/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_dir</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/assets"</font>}}</tt></pre>
+</div></div>
+<p>You can also specify the absolute path to the directory or set it relative to the current directory:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/assets/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">dir</font>, <font color="#FF0000">"/var/www/assets"</font>}}</tt></pre>
+</div></div>
+<h2 id="_customize_the_mimetype_detection">Customize the mimetype detection</h2>
+<p>By default, Cowboy will attempt to recognize the mimetype of your static files by looking at the extension.</p>
+<p>You can override the function that figures out the mimetype of the static files. It can be useful when Cowboy is missing a mimetype you need to handle, or when you want to reduce the list to make lookups faster. You can also give a hard-coded mimetype that will be used unconditionally.</p>
+<p>Cowboy comes with two functions built-in. The default function only handles common file types used when building Web applications. The other function is an extensive list of hundreds of mimetypes that should cover almost any need you may have. You can of course create your own function.</p>
+<p>To use the default function, you should not have to configure anything, as it is the default. If you insist, though, the following will do the job:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/assets/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_dir</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/assets"</font>,
+    [{<font color="#FF6600">mimetypes</font>, <font color="#FF6600">cow_mimetypes</font>, <font color="#FF6600">web</font>}]}}</tt></pre>
+</div></div>
+<p>As you can see, there is an optional field that may contain a list of less used options, like mimetypes or etag. All option types have this optional field.</p>
+<p>To use the function that will detect almost any mimetype, the following configuration will do:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/assets/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_dir</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/assets"</font>,
+    [{<font color="#FF6600">mimetypes</font>, <font color="#FF6600">cow_mimetypes</font>, <font color="#FF6600">all</font>}]}}</tt></pre>
+</div></div>
+<p>You probably noticed the pattern by now. The configuration expects a module and a function name, so you can use any of your own functions instead:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/assets/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_dir</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/assets"</font>,
+    [{<font color="#FF6600">mimetypes</font>, <font color="#009900">Module</font>, <font color="#009900">Function</font>}]}}</tt></pre>
+</div></div>
+<p>The function that performs the mimetype detection receives a single argument that is the path to the file on disk. It is recommended to return the mimetype in tuple form, although a binary string is also allowed (but will require extra processing). If the function can&apos;t figure out the mimetype, then it should return <code>{&lt;&lt;&quot;application&quot;&gt;&gt;, &lt;&lt;&quot;octet-stream&quot;&gt;&gt;, []}</code>.</p>
+<p>When the static handler fails to find the extension, it will send the file as <code>application/octet-stream</code>. A browser receiving such file will attempt to download it directly to disk.</p>
+<p>Finally, the mimetype can be hard-coded for all files. This is especially useful in combination with the <code>file</code> and <code>priv_file</code> options as it avoids needless computation:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_file</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/index.html"</font>,
+    [{<font color="#FF6600">mimetypes</font>, {<font color="#990000">&lt;&lt;</font><font color="#FF0000">"text"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"html"</font><font color="#990000">&gt;&gt;</font>, []}}]}}</tt></pre>
+</div></div>
+<h2 id="_generate_an_etag">Generate an etag</h2>
+<p>By default, the static handler will generate an etag header value based on the size and modified time. This solution can not be applied to all systems though. It would perform rather poorly over a cluster of nodes, for example, as the file metadata will vary from server to server, giving a different etag on each server.</p>
+<p>You can however change the way the etag is calculated:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/assets/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_dir</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/assets"</font>,
+    [{<font color="#FF6600">etag</font>, <font color="#009900">Module</font>, <font color="#009900">Function</font>}]}}</tt></pre>
+</div></div>
+<p>This function will receive three arguments: the path to the file on disk, the size of the file and the last modification time. In a distributed setup, you would typically use the file path to retrieve an etag value that is identical across all your servers.</p>
+<p>You can also completely disable etag handling:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF0000">"/assets/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_dir</font>, <font color="#FF6600">my_app</font>, <font color="#FF0000">"static/assets"</font>,
+    [{<font color="#FF6600">etag</font>, <font color="#000080">false</font>}]}}</tt></pre>
+</div></div>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/loop_handlers/">
+					Loop handlers
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/req/">
+					The Req object
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/guide/streams.asciidoc b/docs/en/cowboy/2.13/guide/streams.asciidoc
new file mode 100644
index 00000000..e8ddae05
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/streams.asciidoc
@@ -0,0 +1,80 @@
+[[streams]]
+== Streams
+
+A stream is the set of messages that form an HTTP
+request/response pair.
+
+The term stream comes from HTTP/2. In Cowboy, it is
+also used when talking about HTTP/1.1 or HTTP/1.0.
+It should not be confused with streaming the request
+or response body.
+
+All versions of HTTP allow clients to initiate
+streams. HTTP/2 is the only one also allowing servers,
+through its server push feature. Both client and
+server-initiated streams go through the same process
+in Cowboy.
+
+=== Stream handlers
+
+link:man:cowboy_stream(3)[Stream handlers]
+must implement five different callbacks.
+Four of them are directly related; one is special.
+
+All callbacks receives the stream ID as first argument.
+
+Most of them can return a list of commands to be executed
+by Cowboy. When callbacks are chained, it is possible to
+intercept and modify these commands. This can be useful
+for modifying responses for example.
+
+The `init/3` callback is invoked when a new request
+comes in. It receives the Req object and the protocol options
+for this listener.
+
+The `data/4` callback is invoked when data from the request
+body is received. It receives both this data and a flag
+indicating whether more is to be expected.
+
+The `info/3` callback is invoked when an Erlang message is
+received for this stream. They will typically be messages
+sent by the request process.
+
+Finally the `terminate/3` callback is invoked with the
+terminate reason for the stream. The return value is ignored.
+Note that as with all terminate callbacks in Erlang, there
+is no strong guarantee that it will be called.
+
+The special callback `early_error/5` is called when an error
+occurs before the request headers were fully received and
+Cowboy is sending a response. It receives the partial Req
+object, the error reason, the protocol options and the response
+Cowboy will send. This response must be returned, possibly
+modified.
+
+=== Built-in handlers
+
+Cowboy comes with four handlers.
+
+link:man:cowboy_stream_h(3)[cowboy_stream_h] is the default
+stream handler. It is the core of much of the functionality
+of Cowboy. All chains of stream handlers should call it last.
+
+link:man:cowboy_compress_h(3)[cowboy_compress_h] will
+automatically compress responses when possible. It is not
+enabled by default. It is a good example for writing your
+own handlers that will modify responses.
+
+link:man:cowboy_decompress_h(3)[cowboy_decompress_h] will
+automatically decompress request bodies when possible.
+It is not enabled by default. It is a good example for
+writing your own handlers that will modify requests.
+
+link:man:cowboy_metrics_h(3)[cowboy_metrics_h] gathers
+metrics about a stream then passes them to a configurable
+function. It is not enabled by default.
+
+link:man:cowboy_tracer_h(3)[cowboy_tracer_h] can be used to
+conditionally trace streams based on the contents of the
+request or its origin. Trace events are passed to a
+configurable function. It is not enabled by default.
diff --git a/docs/en/cowboy/2.13/guide/streams/index.html b/docs/en/cowboy/2.13/guide/streams/index.html
new file mode 100644
index 00000000..2c28b3c1
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/streams/index.html
@@ -0,0 +1,203 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
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+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Streams</span></h1>
+
+<p>A stream is the set of messages that form an HTTP request/response pair.</p>
+<p>The term stream comes from HTTP/2. In Cowboy, it is also used when talking about HTTP/1.1 or HTTP/1.0. It should not be confused with streaming the request or response body.</p>
+<p>All versions of HTTP allow clients to initiate streams. HTTP/2 is the only one also allowing servers, through its server push feature. Both client and server-initiated streams go through the same process in Cowboy.</p>
+<h2 id="_stream_handlers">Stream handlers</h2>
+<p><a href="/docs/en/cowboy/2.13/manual/cowboy_stream">Stream handlers</a> must implement five different callbacks. Four of them are directly related; one is special.</p>
+<p>All callbacks receives the stream ID as first argument.</p>
+<p>Most of them can return a list of commands to be executed by Cowboy. When callbacks are chained, it is possible to intercept and modify these commands. This can be useful for modifying responses for example.</p>
+<p>The <code>init/3</code> callback is invoked when a new request comes in. It receives the Req object and the protocol options for this listener.</p>
+<p>The <code>data/4</code> callback is invoked when data from the request body is received. It receives both this data and a flag indicating whether more is to be expected.</p>
+<p>The <code>info/3</code> callback is invoked when an Erlang message is received for this stream. They will typically be messages sent by the request process.</p>
+<p>Finally the <code>terminate/3</code> callback is invoked with the terminate reason for the stream. The return value is ignored. Note that as with all terminate callbacks in Erlang, there is no strong guarantee that it will be called.</p>
+<p>The special callback <code>early_error/5</code> is called when an error occurs before the request headers were fully received and Cowboy is sending a response. It receives the partial Req object, the error reason, the protocol options and the response Cowboy will send. This response must be returned, possibly modified.</p>
+<h2 id="_built_in_handlers">Built-in handlers</h2>
+<p>Cowboy comes with four handlers.</p>
+<p><a href="/docs/en/cowboy/2.13/manual/cowboy_stream_h">cowboy_stream_h</a> is the default stream handler. It is the core of much of the functionality of Cowboy. All chains of stream handlers should call it last.</p>
+<p><a href="/docs/en/cowboy/2.13/manual/cowboy_compress_h">cowboy_compress_h</a> will automatically compress responses when possible. It is not enabled by default. It is a good example for writing your own handlers that will modify responses.</p>
+<p><a href="/docs/en/cowboy/2.13/manual/cowboy_decompress_h">cowboy_decompress_h</a> will automatically decompress request bodies when possible. It is not enabled by default. It is a good example for writing your own handlers that will modify requests.</p>
+<p><a href="/docs/en/cowboy/2.13/manual/cowboy_metrics_h">cowboy_metrics_h</a> gathers metrics about a stream then passes them to a configurable function. It is not enabled by default.</p>
+<p><a href="/docs/en/cowboy/2.13/manual/cowboy_tracer_h">cowboy_tracer_h</a> can be used to conditionally trace streams based on the contents of the request or its origin. Trace events are passed to a configurable function. It is not enabled by default.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_handlers/">
+					Websocket handlers
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/middlewares/">
+					Middlewares
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+
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diff --git a/docs/en/cowboy/2.13/guide/ws_handlers.asciidoc b/docs/en/cowboy/2.13/guide/ws_handlers.asciidoc
new file mode 100644
index 00000000..7005665e
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/ws_handlers.asciidoc
@@ -0,0 +1,292 @@
+[[ws_handlers]]
+== Websocket handlers
+
+Websocket handlers provide an interface for upgrading HTTP/1.1
+connections to Websocket and sending or receiving frames on
+the Websocket connection.
+
+As Websocket connections are established through the HTTP/1.1
+upgrade mechanism, Websocket handlers need to be able to first
+receive the HTTP request for the upgrade, before switching to
+Websocket and taking over the connection. They can then receive
+or send Websocket frames, handle incoming Erlang messages or
+close the connection.
+
+=== Upgrade
+
+The `init/2` callback is called when the request is received.
+To establish a Websocket connection, you must switch to the
+`cowboy_websocket` module:
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_websocket, Req, State}.
+----
+
+Cowboy will perform the Websocket handshake immediately. Note
+that the handshake will fail if the client did not request an
+upgrade to Websocket.
+
+The Req object becomes unavailable after this function returns.
+Any information required for proper execution of the Websocket
+handler must be saved in the state.
+
+=== Subprotocol
+
+The client may provide a list of Websocket subprotocols it
+supports in the sec-websocket-protocol header. The server *must*
+select one of them and send it back to the client or the
+handshake will fail.
+
+For example, a client could understand both STOMP and MQTT over
+Websocket, and provide the header:
+
+----
+sec-websocket-protocol: v12.stomp, mqtt
+----
+
+If the server only understands MQTT it can return:
+
+----
+sec-websocket-protocol: mqtt
+----
+
+This selection must be done in `init/2`. An example usage could
+be:
+
+[source,erlang]
+----
+init(Req0, State) ->
+    case cowboy_req:parse_header(<<"sec-websocket-protocol">>, Req0) of
+        undefined ->
+            {cowboy_websocket, Req0, State};
+        Subprotocols ->
+            case lists:member(<<"mqtt">>, 1, Subprotocols) of
+                true ->
+                    Req = cowboy_req:set_resp_header(<<"sec-websocket-protocol">>,
+                        <<"mqtt">>, Req0),
+                    {cowboy_websocket, Req, State};
+                false ->
+                    Req = cowboy_req:reply(400, Req0),
+                    {ok, Req, State}
+            end
+    end.
+----
+
+=== Post-upgrade initialization
+
+Cowboy has separate processes for handling the connection
+and requests. Because Websocket takes over the connection,
+the Websocket protocol handling occurs in a different
+process than the request handling.
+
+This is reflected in the different callbacks Websocket
+handlers have. The `init/2` callback is called from the
+temporary request process and the `websocket_` callbacks
+from the connection process.
+
+This means that some initialization cannot be done from
+`init/2`. Anything that would require the current pid,
+or be tied to the current pid, will not work as intended.
+The optional `websocket_init/1` can be used instead:
+
+[source,erlang]
+----
+websocket_init(State) ->
+    erlang:start_timer(1000, self(), <<"Hello!">>),
+    {ok, State}.
+----
+
+All Websocket callbacks share the same return values. This
+means that we can send frames to the client right after
+the upgrade:
+
+[source,erlang]
+----
+websocket_init(State) ->
+    {[{text, <<"Hello!">>}], State}.
+----
+
+=== Receiving frames
+
+Cowboy will call `websocket_handle/2` whenever a text, binary,
+ping or pong frame arrives from the client.
+
+The handler can handle or ignore the frames. It can also
+send frames back to the client or stop the connection.
+
+The following snippet echoes back any text frame received and
+ignores all others:
+
+[source,erlang]
+----
+websocket_handle(Frame = {text, _}, State) ->
+    {[Frame], State};
+websocket_handle(_Frame, State) ->
+    {ok, State}.
+----
+
+Note that ping and pong frames require no action from the
+handler as Cowboy will automatically reply to ping frames.
+They are provided for informative purposes only.
+
+=== Receiving Erlang messages
+
+Cowboy will call `websocket_info/2` whenever an Erlang message
+arrives.
+
+The handler can handle or ignore the messages. It can also
+send frames to the client or stop the connection.
+
+The following snippet forwards log messages to the client
+and ignores all others:
+
+[source,erlang]
+----
+websocket_info({log, Text}, State) ->
+    {[{text, Text}], State};
+websocket_info(_Info, State) ->
+    {ok, State}.
+----
+
+=== Sending frames
+
+// @todo This will be deprecated and eventually replaced with a
+// {Commands, State} interface that allows providing more
+// functionality easily.
+
+All `websocket_` callbacks share return values. They may
+send zero, one or many frames to the client.
+
+To send nothing, just return an ok tuple:
+
+[source,erlang]
+----
+websocket_info(_Info, State) ->
+    {ok, State}.
+----
+
+To send one frame, return the frame to be sent:
+
+[source,erlang]
+----
+websocket_info(_Info, State) ->
+    {[{text, <<"Hello!">>}], State}.
+----
+
+You can send frames of any type: text, binary, ping, pong
+or close frames.
+
+You can send many frames at the same time:
+
+[source,erlang]
+----
+websocket_info(_Info, State) ->
+    {[
+        {text, "Hello"},
+        {text, <<"world!">>},
+        {binary, <<0:8000>>}
+    ], State}.
+----
+
+They are sent in the given order.
+
+=== Keeping the connection alive
+
+Cowboy will automatically respond to ping frames sent by
+the client. They are still forwarded to the handler for
+informative purposes, but no further action is required.
+
+Cowboy does not send ping frames itself. The handler can
+do it if required. A better solution in most cases is to
+let the client handle pings. Doing it from the handler
+would imply having an additional timer per connection and
+this can be a considerable cost for servers that need to
+handle large numbers of connections.
+
+Cowboy can be configured to close idle connections
+automatically. It is highly recommended to configure
+a timeout here, to avoid having processes linger longer
+than needed.
+
+The `init/2` callback can set the timeout to be used
+for the connection. For example, this would make Cowboy
+close connections idle for more than 30 seconds:
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_websocket, Req, State, #{
+        idle_timeout => 30000}}.
+----
+
+This value cannot be changed once it is set. It defaults to
+`60000`.
+
+=== Limiting frame sizes
+
+Cowboy accepts frames of any size by default. You should
+limit the size depending on what your handler may handle.
+You can do this via the `init/2` callback:
+
+[source,erlang]
+----
+init(Req, State) ->
+    {cowboy_websocket, Req, State, #{
+        max_frame_size => 8000000}}.
+----
+
+The lack of limit is historical. A future version of
+Cowboy will have a more reasonable default.
+
+=== Saving memory
+
+The Websocket connection process can be set to hibernate
+after the callback returns.
+
+Simply add an `hibernate` field to the returned tuple:
+
+[source,erlang]
+----
+websocket_init(State) ->
+    {[], State, hibernate}.
+
+websocket_handle(_Frame, State) ->
+    {[], State, hibernate}.
+
+websocket_info(_Info, State) ->
+    {[{text, <<"Hello!">>}], State, hibernate}.
+----
+
+It is highly recommended to write your handlers with
+hibernate enabled, as this allows to greatly reduce the
+memory usage. Do note however that an increase in the
+CPU usage or latency can be observed instead, in particular
+for the more busy connections.
+
+=== Closing the connection
+
+The connection can be closed at any time, either by telling
+Cowboy to stop it or by sending a close frame.
+
+To tell Cowboy to close the connection, use a stop tuple:
+
+[source,erlang]
+----
+websocket_info(_Info, State) ->
+    {stop, State}.
+----
+
+Sending a `close` frame will immediately initiate the closing
+of the Websocket connection. Note that when sending a list of
+frames that include a close frame, any frame found after the
+close frame will not be sent.
+
+The following example sends a close frame with a reason message:
+
+[source,erlang]
+----
+websocket_info(_Info, State) ->
+    {[{close, 1000, <<"some-reason">>}], State}.
+----
diff --git a/docs/en/cowboy/2.13/guide/ws_handlers/index.html b/docs/en/cowboy/2.13/guide/ws_handlers/index.html
new file mode 100644
index 00000000..f8e6b96d
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/ws_handlers/index.html
@@ -0,0 +1,367 @@
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+
+<h1 class="lined-header"><span>Websocket handlers</span></h1>
+
+<p>Websocket handlers provide an interface for upgrading HTTP/1.1 connections to Websocket and sending or receiving frames on the Websocket connection.</p>
+<p>As Websocket connections are established through the HTTP/1.1 upgrade mechanism, Websocket handlers need to be able to first receive the HTTP request for the upgrade, before switching to Websocket and taking over the connection. They can then receive or send Websocket frames, handle incoming Erlang messages or close the connection.</p>
+<h2 id="_upgrade">Upgrade</h2>
+<p>The <code>init/2</code> callback is called when the request is received. To establish a Websocket connection, you must switch to the <code>cowboy_websocket</code> module:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Cowboy will perform the Websocket handshake immediately. Note that the handshake will fail if the client did not request an upgrade to Websocket.</p>
+<p>The Req object becomes unavailable after this function returns. Any information required for proper execution of the Websocket handler must be saved in the state.</p>
+<h2 id="_subprotocol">Subprotocol</h2>
+<p>The client may provide a list of Websocket subprotocols it supports in the sec-websocket-protocol header. The server <strong>must</strong> select one of them and send it back to the client or the handshake will fail.</p>
+<p>For example, a client could understand both STOMP and MQTT over Websocket, and provide the header:</p>
+<div class="listingblock"><div class="content"><pre>sec-websocket-protocol: v12.stomp, mqtt</pre></div></div>
+<p>If the server only understands MQTT it can return:</p>
+<div class="listingblock"><div class="content"><pre>sec-websocket-protocol: mqtt</pre></div></div>
+<p>This selection must be done in <code>init/2</code>. An example usage could be:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req0</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sec-websocket-protocol"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        <font color="#000080">undefined</font> <font color="#990000">-&gt;</font>
+            {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req0</font>, <font color="#009900">State</font>};
+        <font color="#009900">Subprotocols</font> <font color="#990000">-&gt;</font>
+            <b><font color="#0000FF">case</font></b> <b><font color="#000000">lists:member</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"mqtt"</font><font color="#990000">&gt;&gt;</font>, <font color="#993399">1</font>, <font color="#009900">Subprotocols</font>) <b><font color="#0000FF">of</font></b>
+                <font color="#000080">true</font> <font color="#990000">-&gt;</font>
+                    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sec-websocket-protocol"</font><font color="#990000">&gt;&gt;</font>,
+                        <font color="#990000">&lt;&lt;</font><font color="#FF0000">"mqtt"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>),
+                    {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>};
+                <font color="#000080">false</font> <font color="#990000">-&gt;</font>
+                    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">400</font>, <font color="#009900">Req0</font>),
+                    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+            <b><font color="#0000FF">end</font></b>
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_post_upgrade_initialization">Post-upgrade initialization</h2>
+<p>Cowboy has separate processes for handling the connection and requests. Because Websocket takes over the connection, the Websocket protocol handling occurs in a different process than the request handling.</p>
+<p>This is reflected in the different callbacks Websocket handlers have. The <code>init/2</code> callback is called from the temporary request process and the <code>websocket_</code> callbacks from the connection process.</p>
+<p>This means that some initialization cannot be done from <code>init/2</code>. Anything that would require the current pid, or be tied to the current pid, will not work as intended. The optional <code>websocket_init/1</code> can be used instead:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_init</font></b>(<font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#000000">erlang:start_timer</font></b>(<font color="#993399">1000</font>, <b><font color="#000080">self</font></b>(), <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello!"</font><font color="#990000">&gt;&gt;</font>),
+    {<font color="#FF6600">ok</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>All Websocket callbacks share the same return values. This means that we can send frames to the client right after the upgrade:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_init</font></b>(<font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[{<font color="#FF6600">text</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello!"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_receiving_frames">Receiving frames</h2>
+<p>Cowboy will call <code>websocket_handle/2</code> whenever a text, binary, ping or pong frame arrives from the client.</p>
+<p>The handler can handle or ignore the frames. It can also send frames back to the client or stop the connection.</p>
+<p>The following snippet echoes back any text frame received and ignores all others:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_handle</font></b>(<font color="#009900">Frame</font> <font color="#990000">=</font> {<font color="#FF6600">text</font>, <font color="#990000">_</font>}, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[<font color="#009900">Frame</font>], <font color="#009900">State</font>};
+<b><font color="#000000">websocket_handle</font></b>(<font color="#009900">_Frame</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">ok</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Note that ping and pong frames require no action from the handler as Cowboy will automatically reply to ping frames. They are provided for informative purposes only.</p>
+<h2 id="_receiving_erlang_messages">Receiving Erlang messages</h2>
+<p>Cowboy will call <code>websocket_info/2</code> whenever an Erlang message arrives.</p>
+<p>The handler can handle or ignore the messages. It can also send frames to the client or stop the connection.</p>
+<p>The following snippet forwards log messages to the client and ignores all others:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_info</font></b>({<b><font color="#000080">log</font></b>, <font color="#009900">Text</font>}, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[{<font color="#FF6600">text</font>, <font color="#009900">Text</font>}], <font color="#009900">State</font>};
+<b><font color="#000000">websocket_info</font></b>(<font color="#009900">_Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">ok</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_sending_frames">Sending frames</h2>
+<!-- @todo This will be deprecated and eventually replaced with a-->
+<!-- {Commands, State} interface that allows providing more-->
+<!-- functionality easily.-->
+<p>All <code>websocket_</code> callbacks share return values. They may send zero, one or many frames to the client.</p>
+<p>To send nothing, just return an ok tuple:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_info</font></b>(<font color="#009900">_Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">ok</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>To send one frame, return the frame to be sent:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_info</font></b>(<font color="#009900">_Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[{<font color="#FF6600">text</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello!"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>You can send frames of any type: text, binary, ping, pong or close frames.</p>
+<p>You can send many frames at the same time:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_info</font></b>(<font color="#009900">_Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[
+        {<font color="#FF6600">text</font>, <font color="#FF0000">"Hello"</font>},
+        {<font color="#FF6600">text</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"world!"</font><font color="#990000">&gt;&gt;</font>},
+        {<b><font color="#000080">binary</font></b>, <font color="#990000">&lt;&lt;</font><font color="#993399">0</font><font color="#990000">:</font><font color="#993399">8000</font><font color="#990000">&gt;&gt;</font>}
+    ], <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>They are sent in the given order.</p>
+<h2 id="_keeping_the_connection_alive">Keeping the connection alive</h2>
+<p>Cowboy will automatically respond to ping frames sent by the client. They are still forwarded to the handler for informative purposes, but no further action is required.</p>
+<p>Cowboy does not send ping frames itself. The handler can do it if required. A better solution in most cases is to let the client handle pings. Doing it from the handler would imply having an additional timer per connection and this can be a considerable cost for servers that need to handle large numbers of connections.</p>
+<p>Cowboy can be configured to close idle connections automatically. It is highly recommended to configure a timeout here, to avoid having processes linger longer than needed.</p>
+<p>The <code>init/2</code> callback can set the timeout to be used for the connection. For example, this would make Cowboy close connections idle for more than 30 seconds:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, #{
+        <font color="#0000FF">idle_timeout</font> <font color="#990000">=&gt;</font> <font color="#993399">30000</font>}}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>This value cannot be changed once it is set. It defaults to <code>60000</code>.</p>
+<h2 id="_limiting_frame_sizes">Limiting frame sizes</h2>
+<p>Cowboy accepts frames of any size by default. You should limit the size depending on what your handler may handle. You can do this via the <code>init/2</code> callback:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, #{
+        <font color="#0000FF">max_frame_size</font> <font color="#990000">=&gt;</font> <font color="#993399">8000000</font>}}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The lack of limit is historical. A future version of Cowboy will have a more reasonable default.</p>
+<h2 id="_saving_memory">Saving memory</h2>
+<p>The Websocket connection process can be set to hibernate after the callback returns.</p>
+<p>Simply add an <code>hibernate</code> field to the returned tuple:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_init</font></b>(<font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[], <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}<font color="#990000">.</font>
+
+<b><font color="#000000">websocket_handle</font></b>(<font color="#009900">_Frame</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[], <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}<font color="#990000">.</font>
+
+<b><font color="#000000">websocket_info</font></b>(<font color="#009900">_Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[{<font color="#FF6600">text</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello!"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>It is highly recommended to write your handlers with hibernate enabled, as this allows to greatly reduce the memory usage. Do note however that an increase in the CPU usage or latency can be observed instead, in particular for the more busy connections.</p>
+<h2 id="_closing_the_connection">Closing the connection</h2>
+<p>The connection can be closed at any time, either by telling Cowboy to stop it or by sending a close frame.</p>
+<p>To tell Cowboy to close the connection, use a stop tuple:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_info</font></b>(<font color="#009900">_Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">stop</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Sending a <code>close</code> frame will immediately initiate the closing of the Websocket connection. Note that when sending a list of frames that include a close frame, any frame found after the close frame will not be sent.</p>
+<p>The following example sends a close frame with a reason message:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">websocket_info</font></b>(<font color="#009900">_Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {[{<font color="#FF6600">close</font>, <font color="#993399">1000</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"some-reason"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_protocol/">
+					The Websocket protocol
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/streams/">
+					Streams
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
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+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
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+
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+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                <ul>
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+                </ul>
+              </nav>
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+               <p><img src="/img/footer_logo.png"></p>
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+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/guide/ws_protocol.asciidoc b/docs/en/cowboy/2.13/guide/ws_protocol.asciidoc
new file mode 100644
index 00000000..8fa0673d
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/ws_protocol.asciidoc
@@ -0,0 +1,69 @@
+[[ws_protocol]]
+== The Websocket protocol
+
+This chapter explains what Websocket is and why it is
+a vital component of soft realtime Web applications.
+
+=== Description
+
+Websocket is an extension to HTTP that emulates plain TCP
+connections between the client, typically a Web browser,
+and the server. It uses the HTTP Upgrade mechanism to
+establish the connection.
+
+Websocket connections are fully asynchronous, unlike
+HTTP/1.1 (synchronous) and HTTP/2 (asynchronous, but the
+server can only initiate streams in response to requests).
+With Websocket, the client and the server can both send
+frames at any time without any restriction. It is closer
+to TCP than any of the HTTP protocols.
+
+Websocket is an IETF standard. Cowboy supports the standard
+and all drafts that were previously implemented by browsers,
+excluding the initial flawed draft sometimes known as
+"version 0".
+
+=== Websocket vs HTTP/2
+
+For a few years Websocket was the only way to have a
+bidirectional asynchronous connection with the server.
+This changed when HTTP/2 was introduced. While HTTP/2
+requires the client to first perform a request before
+the server can push data, this is only a minor restriction
+as the client can do so just as it connects.
+
+Websocket was designed as a kind-of-TCP channel to a
+server. It only defines the framing and connection
+management and lets the developer implement a protocol
+on top of it. For example you could implement IRC over
+Websocket and use a Javascript IRC client to speak to
+the server.
+
+HTTP/2 on the other hand is just an improvement over
+the HTTP/1.1 connection and request/response mechanism.
+It has the same semantics as HTTP/1.1.
+
+If all you need is to access an HTTP API, then HTTP/2
+should be your first choice. On the other hand, if what
+you need is a different protocol, then you can use
+Websocket to implement it.
+
+=== Implementation
+
+Cowboy implements Websocket as a protocol upgrade. Once the
+upgrade is performed from the `init/2` callback, Cowboy
+switches to Websocket. Please consult the next chapter for
+more information on initiating and handling Websocket
+connections.
+
+The implementation of Websocket in Cowboy is validated using
+the Autobahn test suite, which is an extensive suite of tests
+covering all aspects of the protocol. Cowboy passes the
+suite with 100% success, including all optional tests.
+
+Cowboy's Websocket implementation also includes the
+permessage-deflate and x-webkit-deflate-frame compression
+extensions.
+
+Cowboy will automatically use compression when the
+`compress` option is returned from the `init/2` function.
diff --git a/docs/en/cowboy/2.13/guide/ws_protocol/index.html b/docs/en/cowboy/2.13/guide/ws_protocol/index.html
new file mode 100644
index 00000000..40d6f162
--- /dev/null
+++ b/docs/en/cowboy/2.13/guide/ws_protocol/index.html
@@ -0,0 +1,199 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: The Websocket protocol</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
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+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
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+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
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+					</li>
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+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>The Websocket protocol</span></h1>
+
+<p>This chapter explains what Websocket is and why it is a vital component of soft realtime Web applications.</p>
+<h2 id="_description">Description</h2>
+<p>Websocket is an extension to HTTP that emulates plain TCP connections between the client, typically a Web browser, and the server. It uses the HTTP Upgrade mechanism to establish the connection.</p>
+<p>Websocket connections are fully asynchronous, unlike HTTP/1.1 (synchronous) and HTTP/2 (asynchronous, but the server can only initiate streams in response to requests). With Websocket, the client and the server can both send frames at any time without any restriction. It is closer to TCP than any of the HTTP protocols.</p>
+<p>Websocket is an IETF standard. Cowboy supports the standard and all drafts that were previously implemented by browsers, excluding the initial flawed draft sometimes known as &quot;version 0&quot;.</p>
+<h2 id="_websocket_vs_http_2">Websocket vs HTTP/2</h2>
+<p>For a few years Websocket was the only way to have a bidirectional asynchronous connection with the server. This changed when HTTP/2 was introduced. While HTTP/2 requires the client to first perform a request before the server can push data, this is only a minor restriction as the client can do so just as it connects.</p>
+<p>Websocket was designed as a kind-of-TCP channel to a server. It only defines the framing and connection management and lets the developer implement a protocol on top of it. For example you could implement IRC over Websocket and use a Javascript IRC client to speak to the server.</p>
+<p>HTTP/2 on the other hand is just an improvement over the HTTP/1.1 connection and request/response mechanism. It has the same semantics as HTTP/1.1.</p>
+<p>If all you need is to access an HTTP API, then HTTP/2 should be your first choice. On the other hand, if what you need is a different protocol, then you can use Websocket to implement it.</p>
+<h2 id="_implementation">Implementation</h2>
+<p>Cowboy implements Websocket as a protocol upgrade. Once the upgrade is performed from the <code>init/2</code> callback, Cowboy switches to Websocket. Please consult the next chapter for more information on initiating and handling Websocket connections.</p>
+<p>The implementation of Websocket in Cowboy is validated using the Autobahn test suite, which is an extensive suite of tests covering all aspects of the protocol. Cowboy passes the suite with 100% success, including all optional tests.</p>
+<p>Cowboy&apos;s Websocket implementation also includes the permessage-deflate and x-webkit-deflate-frame compression extensions.</p>
+<p>Cowboy will automatically use compression when the <code>compress</code> option is returned from the <code>init/2</code> function.</p>
+
+
+
+
+	
+		
+		
+		
+		
+		
+
+		<nav style="margin:1em 0">
+			
+				<a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/resource_design/">
+					Designing a resource handler
+				</a>
+			
+
+			
+				<a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_handlers/">
+					Websocket handlers
+				</a>
+			
+		</nav>
+	
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	
+	User Guide
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
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+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
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+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy.get_env/index.html b/docs/en/cowboy/2.13/manual/cowboy.get_env/index.html
new file mode 100644
index 00000000..96b871e3
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy.get_env/index.html
@@ -0,0 +1,211 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy:get_env(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy:get_env(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy:get_env - Retrieve a listener&apos;s environment value</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">get_env</font></b>(<font color="#009900">Name</font> <font color="#990000">::</font> <b><font color="#000000">ranch:ref</font></b>(),
+        <font color="#009900">Key</font>  <font color="#990000">::</font> <b><font color="#000080">atom</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">any</font></b>()
+
+<b><font color="#000000">get_env</font></b>(<font color="#009900">Name</font>    <font color="#990000">::</font> <b><font color="#000000">ranch:ref</font></b>(),
+        <font color="#009900">Key</font>     <font color="#990000">::</font> <b><font color="#000080">atom</font></b>(),
+        <font color="#009900">Default</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Retrieve an environment value for a previously started listener.</p>
+<p>This function may crash when the key is missing from the environment and a default value is not provided.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>The name of the listener to access.</p>
+<p>The name of the listener is the first argument given to the <a href="../cowboy.start_clear">cowboy:start_clear(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a> or <a href="../ranch.start_listener">ranch:start_listener(3)</a> function.</p>
+</dd>
+<dt>Key</dt>
+<dd><p>The key in the environment map. Common keys include <code>dispatch</code> and <code>middlewares</code>.</p>
+</dd>
+<dt>Default</dt>
+<dd><p>The default value if the key is missing.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The environment value is returned on success.</p>
+<p>If a default was provided and the key is missing, then the default value is returned.</p>
+<p>An <code>exit:badarg</code> exception is thrown when the listener does not exist.</p>
+<p>An <code>exit:{badkey, Key}</code> exception is thrown when the key requested is missing and no default was provided.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Retrieve a listener&apos;s routes</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy:get_env</font></b>(<font color="#FF6600">example</font>, <font color="#FF6600">dispatch</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy">cowboy(3)</a>, <a href="../cowboy.start_clear">cowboy:start_clear(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a>, <a href="../cowboy.set_env">cowboy:set_env(3)</a>, <a href="../ranch.get_protocol_options">ranch:get_protocol_options(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.13/manual/cowboy.set_env/index.html
new file mode 100644
index 00000000..31bc6c79
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy.set_env/index.html
@@ -0,0 +1,214 @@
+<!DOCTYPE html>
+<html lang="en">
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+
+<h1 class="lined-header"><span>cowboy:set_env(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy:set_env - Update a listener&apos;s environment value</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">set_env</font></b>(<font color="#009900">Name</font>  <font color="#990000">::</font> <b><font color="#000000">ranch:ref</font></b>(),
+        <font color="#009900">Key</font>   <font color="#990000">::</font> <b><font color="#000080">atom</font></b>(),
+        <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>())
+    <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font></tt></pre>
+</div></div>
+<p>Set or update an environment value for a previously started listener.</p>
+<p>This is most useful for updating the routes dynamically, without having to restart the listener.</p>
+<p>The new value will only be available to new connections. Pre-existing connections will still use the old value.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>The name of the listener to update.</p>
+<p>The name of the listener is the first argument given to the <a href="../cowboy.start_clear">cowboy:start_clear(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a> or <a href="../ranch.start_listener">ranch:start_listener(3)</a> function.</p>
+</dd>
+<dt>Key</dt>
+<dd><p>The key in the environment map. Common keys include <code>dispatch</code> and <code>middlewares</code>.</p>
+</dd>
+<dt>Value</dt>
+<dd><p>The new value.</p>
+<p>The type of the value differs depending on the key.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is returned on success.</p>
+<p>An <code>exit:badarg</code> exception is thrown when the listener does not exist.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Update a listener&apos;s routes</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+    {<font color="#FF6600">'_'</font>, [
+        {<font color="#FF0000">"/"</font>, <font color="#FF6600">toppage_h</font>, []},
+        {<font color="#FF0000">"/ws"</font>, <font color="#FF6600">websocket_h</font>, []}
+    ]}
+]),
+
+<b><font color="#000000">cowboy:set_env</font></b>(<font color="#FF6600">example</font>, <font color="#FF6600">dispatch</font>, <font color="#009900">Dispatch</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy">cowboy(3)</a>, <a href="../cowboy.start_clear">cowboy:start_clear(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a>, <a href="../cowboy.get_env">cowboy:get_env(3)</a>, <a href="../ranch.set_protocol_options">ranch:set_protocol_options(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.13/manual/cowboy.start_clear/index.html
new file mode 100644
index 00000000..bf89b8fa
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy.start_clear/index.html
@@ -0,0 +1,232 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+    <title>Nine Nines: cowboy:start_clear(3)</title>
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+
+<h1 class="lined-header"><span>cowboy:start_clear(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy:start_clear - Listen for connections using plain TCP</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">start_clear</font></b>(<font color="#009900">Name</font>          <font color="#990000">::</font> <b><font color="#000000">ranch:ref</font></b>(),
+            <font color="#009900">TransportOpts</font> <font color="#990000">::</font> <b><font color="#000000">ranch_tcp:opts</font></b>(),
+            <font color="#009900">ProtocolOpts</font>  <font color="#990000">::</font> <b><font color="#000000">opts</font></b>())
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">ListenerPid</font> <font color="#990000">::</font> <b><font color="#000080">pid</font></b>()}
+     | {<font color="#FF6600">error</font>, <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>Start listening for connections over a clear TCP channel.</p>
+<p>Both HTTP/1.1 and HTTP/2 are supported on this listener. HTTP/2 has two methods of establishing a connection over a clear TCP channel. Both the upgrade and the prior knowledge methods are supported.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</p>
+<p>It can be any Erlang term. An atom is generally good enough, for example <code>api</code>, <code>my_app_clear</code> or <code>my_app_tls</code>.</p>
+</dd>
+<dt>TransportOpts</dt>
+<dd><p>The transport options are where the TCP options, including the listener&apos;s port number, are defined. Transport options are provided as a list of keys and values, for example <code>[{port, 8080}]</code>.</p>
+<p>The available options are documented in the <a href="../ranch_tcp">ranch_tcp(3)</a> manual.</p>
+</dd>
+<dt>ProtocolOpts</dt>
+<dd><p>The protocol options are in a map containing all the options for the different protocols that may be involved when connecting to the listener, including HTTP/1.1 and HTTP/2.</p>
+<p>The HTTP/1.1 options are documented in the <a href="../cowboy_http">cowboy_http(3)</a> manual; and the HTTP/2 options in <a href="../cowboy_http2">cowboy_http2(3)</a>. Stream handlers such as <a href="../cowboy_stream_h">cowboy_stream_h(3)</a> (which is enabled by default) may also define options.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>An ok tuple is returned on success. It contains the pid of the top-level supervisor for the listener.</p>
+<p>An error tuple is returned on error. The error reason may be any Erlang term.</p>
+<p>A common error is <code>eaddrinuse</code>. It indicates that the port configured for Cowboy is already in use.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: HTTP/2 support added.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>cowboy:start_http/4</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Start a listener</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+    {<font color="#FF6600">'_'</font>, [
+        {<font color="#FF0000">"/"</font>, <font color="#FF6600">toppage_h</font>, []}
+    ]}
+]),
+
+{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_clear</font></b>(<font color="#FF6600">example</font>, [{<font color="#FF6600">port</font>, <font color="#993399">8080</font>}], #{
+    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
+})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Start a listener on a random port</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Name</font> <font color="#990000">=</font> <font color="#FF6600">example</font>,
+
+{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_clear</font></b>(<font color="#009900">Name</font>, [], #{
+    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
+}),
+
+<font color="#009900">Port</font> <font color="#990000">=</font> <b><font color="#000000">ranch:get_port</font></b>(<font color="#009900">Name</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy">cowboy(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a>, <a href="../cowboy.stop_listener">cowboy:stop_listener(3)</a>, <a href="../ranch">ranch(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
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+    <script src="/js/custom.js"></script>
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+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.13/manual/cowboy.start_tls/index.html
new file mode 100644
index 00000000..6acc2039
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy.start_tls/index.html
@@ -0,0 +1,237 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy:start_tls(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
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+<body class="">
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+    <div id="topbar" class="container">
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+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy:start_tls(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy:start_tls - Listen for connections using TLS</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">start_tls</font></b>(<font color="#009900">Name</font>          <font color="#990000">::</font> <b><font color="#000000">ranch:ref</font></b>(),
+          <font color="#009900">TransportOpts</font> <font color="#990000">::</font> <b><font color="#000000">ranch_ssl:opts</font></b>(),
+          <font color="#009900">ProtocolOpts</font>  <font color="#990000">::</font> <b><font color="#000000">opts</font></b>())
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">ListenerPid</font> <font color="#990000">::</font> <b><font color="#000080">pid</font></b>()}
+     | {<font color="#FF6600">error</font>, <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>Start listening for connections over a secure TLS channel.</p>
+<p>Both HTTP/1.1 and HTTP/2 are supported on this listener. The ALPN TLS extension must be used to initiate an HTTP/2 connection.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</p>
+<p>It can be any Erlang term. An atom is generally good enough, for example <code>api</code>, <code>my_app_clear</code> or <code>my_app_tls</code>.</p>
+</dd>
+<dt>TransportOpts</dt>
+<dd><p>The transport options are where the TCP options, including the listener&apos;s port number, are defined. They also contain the TLS options, like the server&apos;s certificate. Transport options are provided as a list of keys and values, for example <code>[{port, 8443}, {certfile, &quot;path/to/cert.pem&quot;}]</code>.</p>
+<p>The available options are documented in the <a href="../ranch_ssl">ranch_ssl(3)</a> manual.</p>
+</dd>
+<dt>ProtocolOpts</dt>
+<dd><p>The protocol options are in a map containing all the options for the different protocols that may be involved when connecting to the listener, including HTTP/1.1 and HTTP/2.</p>
+<p>The HTTP/1.1 options are documented in the <a href="../cowboy_http">cowboy_http(3)</a> manual; and the HTTP/2 options in <a href="../cowboy_http2">cowboy_http2(3)</a>. Stream handlers such as <a href="../cowboy_stream_h">cowboy_stream_h(3)</a> (which is enabled by default) may also define options.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>An ok tuple is returned on success. It contains the pid of the top-level supervisor for the listener.</p>
+<p>An error tuple is returned on error. The error reason may be any Erlang term.</p>
+<p>A common error is <code>eaddrinuse</code>. It indicates that the port configured for Cowboy is already in use.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: HTTP/2 support added.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>cowboy:start_https/4</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Start a listener</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+    {<font color="#FF6600">'_'</font>, [
+        {<font color="#FF0000">"/"</font>, <font color="#FF6600">toppage_h</font>, []}
+    ]}
+]),
+
+{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_tls</font></b>(<font color="#FF6600">example</font>, [
+    {<font color="#FF6600">port</font>, <font color="#993399">8443</font>},
+    {<font color="#FF6600">certfile</font>, <font color="#FF0000">"path/to/cert.pem"</font>}
+], #{
+    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
+})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Start a listener on a random port</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Name</font> <font color="#990000">=</font> <font color="#FF6600">example</font>,
+
+{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_tls</font></b>(<font color="#009900">Name</font>, [
+    {<font color="#FF6600">certfile</font>, <font color="#FF0000">"path/to/cert.pem"</font>}
+], #{
+    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
+}),
+
+<font color="#009900">Port</font> <font color="#990000">=</font> <b><font color="#000000">ranch:get_port</font></b>(<font color="#009900">Name</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy">cowboy(3)</a>, <a href="../cowboy.start_clear">cowboy:start_clear(3)</a>, <a href="../cowboy.stop_listener">cowboy:stop_listener(3)</a>, <a href="../ranch">ranch(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
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+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
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+
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+      <footer>
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+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
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+    <script src="/js/custom.js"></script>
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+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.13/manual/cowboy.stop_listener/index.html
new file mode 100644
index 00000000..ac59b266
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy.stop_listener/index.html
@@ -0,0 +1,197 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy:stop_listener(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy:stop_listener(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy:stop_listener - Stop the given listener</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">stop_listener</font></b>(<font color="#009900">Name</font> <font color="#990000">::</font> <b><font color="#000000">ranch:ref</font></b>())
+    <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font> | {<font color="#FF6600">error</font>, <font color="#FF6600">not_found</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Stop a previously started listener.</p>
+<p>Alias of <a href="../ranch.stop_listener">ranch:stop_listener(3)</a>.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>The name of the listener to be stopped.</p>
+<p>The name of the listener is the first argument given to the <a href="../cowboy.start_clear">cowboy:start_clear(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a> or <a href="../ranch.start_listener">ranch:start_listener(3)</a> function.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is returned on success.</p>
+<p>The <code>{error, not_found}</code> tuple is returned when the listener does not exist.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Stop a listener</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#0000FF">ok</font> <font color="#990000">=</font> <b><font color="#000000">cowboy:stop_listener</font></b>(<font color="#FF6600">example</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy">cowboy(3)</a>, <a href="../cowboy.start_clear">cowboy:start_clear(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a>, <a href="../ranch">ranch(3)</a>, <a href="../ranch.start_listener">ranch:start_listener(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
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+
+      <footer>
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+          <div class="row">
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+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
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+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
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+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy/index.html b/docs/en/cowboy/2.13/manual/cowboy/index.html
new file mode 100644
index 00000000..d06c5037
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy/index.html
@@ -0,0 +1,233 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
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+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
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+                </ul>
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+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
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+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
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+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy - HTTP server</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy</code> provides convenience functions for manipulating Ranch listeners.</p>
+<h2 id="_exports">Exports</h2>
+<ul><li><a href="../cowboy.start_clear">cowboy:start_clear(3)</a> - Listen for connections using plain TCP
+</li>
+<li><a href="../cowboy.start_tls">cowboy:start_tls(3)</a> - Listen for connections using TLS
+</li>
+<li><a href="../cowboy.stop_listener">cowboy:stop_listener(3)</a> - Stop the given listener
+</li>
+<li><a href="../cowboy.get_env">cowboy:get_env(3)</a> - Retrieve a listener&apos;s environment value
+</li>
+<li><a href="../cowboy.set_env">cowboy:set_env(3)</a> - Update a listener&apos;s environment value
+</li>
+</ul>
+<h2 id="_types">Types</h2>
+<h3 id="_fields">fields()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">fields</font></b>() <font color="#990000">::</font> [<font color="#009900">Name</font>
+           | {<font color="#009900">Name</font>, <font color="#009900">Constraints</font>}
+           | {<font color="#009900">Name</font>, <font color="#009900">Constraints</font>, <font color="#009900">Default</font>}]
+
+<font color="#009900">Name</font>        <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()
+<font color="#009900">Constraints</font> <font color="#990000">::</font> <font color="#009900">Constraint</font> | [<font color="#009900">Constraint</font>]
+<font color="#009900">Constraint</font>  <font color="#990000">::</font> <b><font color="#000000">cowboy_constraints:constraint</font></b>()
+<font color="#009900">Default</font>     <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Fields description for match operations.</p>
+<p>This type is used in <a href="../cowboy_router">cowboy_router(3)</a> for matching bindings and in the match functions found in <a href="../cowboy_req">cowboy_req(3)</a>.</p>
+<h3 id="_http_headers">http_headers()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">http_headers</font></b>() <font color="#990000">::</font> #{<b><font color="#000080">binary</font></b>() <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>()}</tt></pre>
+</div></div>
+<p>HTTP headers.</p>
+<h3 id="_http_status">http_status()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">http_status</font></b>() <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>() | <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>HTTP response status.</p>
+<p>A binary status can be used to set a reason phrase. Note however that HTTP/2 only sends the status code and drops the reason phrase entirely.</p>
+<h3 id="_http_version">http_version()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">http_version</font></b>() <font color="#990000">::</font> <font color="#FF6600">'HTTP/2'</font> | <font color="#FF6600">'HTTP/1.1'</font> | <font color="#FF6600">'HTTP/1.0'</font></tt></pre>
+</div></div>
+<p>HTTP version.</p>
+<p>Note that semantically, HTTP/1.1 and HTTP/2 are equivalent.</p>
+<h3 id="_opts">opts()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> <b><font color="#000000">map</font></b>()</tt></pre>
+</div></div>
+<p>Options for the HTTP/1.1, HTTP/2 and Websocket protocols.</p>
+<p>The protocol options are in a map containing all the options for the different protocols that may be involved when connecting to the listener, including HTTP/1.1 and HTTP/2.</p>
+<p>The HTTP/1.1 options are documented in the <a href="../cowboy_http">cowboy_http(3)</a> manual and the HTTP/2 options in <a href="../cowboy_http2">cowboy_http2(3)</a>.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../ranch">ranch(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
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+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
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+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_app/index.html b/docs/en/cowboy/2.13/manual/cowboy_app/index.html
new file mode 100644
index 00000000..9345af21
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_app/index.html
@@ -0,0 +1,244 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy(7)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
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+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
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+            </div>
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+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy(7)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy - Small, fast, modern HTTP server for Erlang/OTP</p>
+<h2 id="_description">Description</h2>
+<p>Cowboy is an HTTP server for Erlang/OTP with support for the HTTP/1.1, HTTP/2 and Websocket protocols.</p>
+<p>Cowboy aims to provide a complete HTTP stack. This includes the implementation of the HTTP RFCs but also any directly related standards, like Websocket or Server-Sent Events.</p>
+<h2 id="_modules">Modules</h2>
+<p>Functions:</p>
+<ul><li><a href="../cowboy">cowboy(3)</a> - Listener management
+</li>
+<li><a href="../cowboy_req">cowboy_req(3)</a> - Request and response
+</li>
+<li><a href="../cowboy_router">cowboy_router(3)</a> - Router
+</li>
+<li><a href="../cowboy_constraints">cowboy_constraints(3)</a> - Constraints
+</li>
+</ul>
+<p>Protocols:</p>
+<ul><li><a href="../cowboy_http">cowboy_http(3)</a> - HTTP/1.1
+</li>
+<li><a href="../cowboy_http2">cowboy_http2(3)</a> - HTTP/2
+</li>
+<li><a href="../cowboy_websocket">cowboy_websocket(3)</a> - Websocket
+</li>
+</ul>
+<p>Handlers:</p>
+<ul><li><a href="../cowboy_static">cowboy_static(3)</a> - Static file handler
+</li>
+</ul>
+<p>Stream handlers:</p>
+<ul><li><a href="../cowboy_stream_h">cowboy_stream_h(3)</a> - Default stream handler
+</li>
+<li><a href="../cowboy_compress_h">cowboy_compress_h(3)</a> - Compress stream handler
+</li>
+<li><a href="../cowboy_decompress_h">cowboy_decompress_h(3)</a> - Decompress stream handler
+</li>
+<li><a href="../cowboy_metrics_h">cowboy_metrics_h(3)</a> - Metrics stream handler
+</li>
+<li><a href="../cowboy_tracer_h">cowboy_tracer_h(3)</a> - Tracer stream handler
+</li>
+</ul>
+<p>Behaviors:</p>
+<ul><li><a href="../cowboy_handler">cowboy_handler(3)</a> - Plain HTTP handlers
+</li>
+<li><a href="../cowboy_loop">cowboy_loop(3)</a> - Loop handlers
+</li>
+<li><a href="../cowboy_middleware">cowboy_middleware(3)</a> - Middlewares
+</li>
+<li><a href="../cowboy_rest">cowboy_rest(3)</a> - REST handlers
+</li>
+<li><a href="../cowboy_stream">cowboy_stream(3)</a> - Stream handlers
+</li>
+<li><a href="../cowboy_websocket">cowboy_websocket(3)</a> - Websocket handlers
+</li>
+</ul>
+<p>Middlewares:</p>
+<ul><li><a href="../cowboy_router">cowboy_router(3)</a> - Router middleware
+</li>
+<li><a href="../cowboy_handler">cowboy_handler(3)</a> - Handler middleware
+</li>
+</ul>
+<!-- @todo http_status_codes is not linked to; what to do with it?-->
+<h2 id="_dependencies">Dependencies</h2>
+<ul><li><a href="../ranch">ranch(7)</a> - Socket acceptor pool for TCP protocols
+</li>
+<li><a href="../cowlib">cowlib(7)</a> - Support library for manipulating Web protocols
+</li>
+<li>ssl - Secure communication over sockets
+</li>
+<li>crypto - Crypto functions
+</li>
+</ul>
+<p>All these applications must be started before the <code>cowboy</code> application. To start Cowboy and all dependencies at once:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">application:ensure_all_started</font></b>(<font color="#FF6600">cowboy</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_environment">Environment</h2>
+<p>The <code>cowboy</code> application does not define any application environment configuration parameters.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="../ranch">ranch(7)</a>, <a href="../cowlib">cowlib(7)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_compress_h/index.html b/docs/en/cowboy/2.13/manual/cowboy_compress_h/index.html
new file mode 100644
index 00000000..f982145b
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_compress_h/index.html
@@ -0,0 +1,202 @@
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+
+<h1 class="lined-header"><span>cowboy_compress_h(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_compress_h - Compress stream handler</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_compress_h</code> compresses response bodies automatically when the client supports it. It will not try to compress responses that already have a content encoding or that have an etag header defined.</p>
+<p>Normal responses will only be compressed when their size is lower than the configured threshold. Streamed responses are always compressed, including when the sendfile command is used. Because the file must be read in memory to be compressed, this module is <strong>not</strong> suitable for automatically compressing large files.</p>
+<h2 id="_options">Options</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">compress_buffering</font> <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">compress_threshold</font> <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>()
+}</tt></pre>
+</div></div>
+<p>Configuration for the compress stream handler.</p>
+<p>The default value is given next to the option name:</p>
+<dl><dt>compress_buffering (false)</dt>
+<dd><p>Whether the output will be buffered. By default no buffering is done to provide maximum compatibility at the cost of a lower compression rate.</p>
+<p>This option can be updated at any time using the <code>set_options</code> stream handler command.</p>
+</dd>
+<dt>compress_threshold (300)</dt>
+<dd><p>How large the response body must be to be compressed when the response isn&apos;t streamed.</p>
+<p>This option can be updated at any time using the <code>set_options</code> stream handler command.</p>
+</dd>
+</dl>
+<h2 id="_events">Events</h2>
+<p>The compress stream handler does not produce any event.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: Compression is now disabled when the etag header is in the response headers.
+</li>
+<li><strong>2.11</strong>: The vary: accept-encoding header is now always set when this handler is enabled.
+</li>
+<li><strong>2.6</strong>: The options <code>compress_buffering</code> and <code>compress_threshold</code> were added.
+</li>
+<li><strong>2.0</strong>: Module introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_decompress_h">cowboy_decompress_h(3)</a>, <a href="../cowboy_metrics_h">cowboy_metrics_h(3)</a>, <a href="../cowboy_stream_h">cowboy_stream_h(3)</a>, <a href="../cowboy_tracer_h">cowboy_tracer_h(3)</a></p>
+
+
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+
+
+
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+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.13/manual/cowboy_constraints.int/index.html
new file mode 100644
index 00000000..c7290957
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_constraints.int/index.html
@@ -0,0 +1,207 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+<h1 class="lined-header"><span>cowboy_constraints:int(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_constraints:int - Integer constraint</p>
+<h2 id="_description">Description</h2>
+<p>Constraint functions implement a number of different operations.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">int</font></b>(<font color="#FF6600">forward</font>, <font color="#009900">Bin</font>) <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Int</font>} | {<font color="#FF6600">error</font>, <font color="#FF6600">not_an_integer</font>}
+
+<font color="#009900">Bin</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()
+<font color="#009900">Int</font> <font color="#990000">::</font> <b><font color="#000080">integer</font></b>()</tt></pre>
+</div></div>
+<p>Validate and convert the text representation of an integer.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">int</font></b>(<font color="#FF6600">reverse</font>, <font color="#009900">Int</font>) <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Bin</font>} | {<font color="#FF6600">error</font>, <font color="#FF6600">not_an_integer</font>}</tt></pre>
+</div></div>
+<p>Convert an integer back to its text representation.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">int</font></b>(<font color="#FF6600">format_error</font>, <font color="#009900">Error</font>) <font color="#990000">-&gt;</font> <font color="#009900">HumanReadable</font>
+
+<font color="#009900">Error</font>         <font color="#990000">::</font> {<font color="#FF6600">not_an_integer</font>, <font color="#009900">Bin</font> | <font color="#009900">Int</font>}
+<font color="#009900">HumanReadable</font> <font color="#990000">::</font> <b><font color="#000000">iolist</font></b>()</tt></pre>
+</div></div>
+<p>Generate a human-readable error message.</p>
+<h2 id="_arguments">Arguments</h2>
+<p>Arguments vary depending on the operation. Constraint functions always take the operation type as first argument, and the value as second argument.</p>
+<h2 id="_return_value">Return value</h2>
+<p>The return value varies depending on the operation.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Interface modified to allow for a variety of operations.
+</li>
+<li><strong>1.0</strong>: Constraint introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<p>This function is not meant to be called directly.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_constraints">cowboy_constraints(3)</a>, <a href="../cowboy_constraints.nonempty">cowboy_constraints:nonempty(3)</a>, <a href="../cowboy_router">cowboy_router(3)</a>, <a href="../cowboy_req.match_cookies">cowboy_req:match_cookies(3)</a>, <a href="../cowboy_req.match_qs">cowboy_req:match_qs(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
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+<h4 id="docs-nav">Navigation</h4>
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+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/index.html
new file mode 100644
index 00000000..a9d4dd6d
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/index.html
@@ -0,0 +1,206 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+<h1 class="lined-header"><span>cowboy_constraints:nonempty(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_constraints:nonempty - Non-empty constraint</p>
+<h2 id="_description">Description</h2>
+<p>Constraint functions implement a number of different operations.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">nonempty</font></b>(<font color="#FF6600">forward</font> | <font color="#FF6600">reverse</font>, <font color="#990000">&lt;&lt;&gt;&gt;</font>) <font color="#990000">-&gt;</font> {<font color="#FF6600">error</font>, <font color="#FF6600">empty</font>}</tt></pre>
+</div></div>
+<p>Reject empty values.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">nonempty</font></b>(<font color="#FF6600">forward</font> | <font color="#FF6600">reverse</font>, <font color="#009900">Bin</font>) <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Bin</font>}
+
+<font color="#009900">Bin</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>Accept any other binary values.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">nonempty</font></b>(<font color="#FF6600">format_error</font>, <font color="#009900">Error</font>) <font color="#990000">-&gt;</font> <font color="#009900">HumanReadable</font>
+
+<font color="#009900">Error</font>         <font color="#990000">::</font> {<font color="#FF6600">empty</font>, <font color="#009900">Bin</font>}
+<font color="#009900">HumanReadable</font> <font color="#990000">::</font> <b><font color="#000000">iolist</font></b>()</tt></pre>
+</div></div>
+<p>Generate a human-readable error message.</p>
+<h2 id="_arguments">Arguments</h2>
+<p>Arguments vary depending on the operation. Constraint functions always take the operation type as first argument, and the value as second argument.</p>
+<h2 id="_return_value">Return value</h2>
+<p>The return value varies depending on the operation.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Interface modified to allow for a variety of operations.
+</li>
+<li><strong>1.0</strong>: Constraint introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<p>This function is not meant to be called directly.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_constraints">cowboy_constraints(3)</a>, <a href="../cowboy_constraints.int">cowboy_constraints:int(3)</a>, <a href="../cowboy_router">cowboy_router(3)</a>, <a href="../cowboy_req.match_cookies">cowboy_req:match_cookies(3)</a>, <a href="../cowboy_req.match_qs">cowboy_req:match_qs(3)</a></p>
+
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+<h3>
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+	
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+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.13/manual/cowboy_constraints/index.html
new file mode 100644
index 00000000..37354ddd
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_constraints/index.html
@@ -0,0 +1,198 @@
+<!DOCTYPE html>
+<html lang="en">
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+<h1 class="lined-header"><span>cowboy_constraints(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_constraints - Constraints</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_constraints</code> defines the built-in constraints in Cowboy and provides an interface for manipulating these constraints.</p>
+<p>Constraints are functions that define what type of input is allowed. They are used throughout Cowboy, from the router to query strings to cookies.</p>
+<h2 id="_exports">Exports</h2>
+<p>Built-in constraints:</p>
+<ul><li><a href="../cowboy_constraints.int">cowboy_constraints:int(3)</a> - Integer constraint
+</li>
+<li><a href="../cowboy_constraints.nonempty">cowboy_constraints:nonempty(3)</a> - Non-empty constraint
+</li>
+</ul>
+<h2 id="_types">Types</h2>
+<h3 id="_constraint">constraint()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">constraint</font></b>() <font color="#990000">::</font> <font color="#FF6600">int</font> | <font color="#FF6600">nonempty</font> | <b><font color="#0000FF">fun</font></b>()</tt></pre>
+</div></div>
+<p>A constraint function.</p>
+<p>The atom constraints are built-in, see the corresponding function in the exports list above.</p>
+<h3 id="_reason">reason()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">reason</font></b>() <font color="#990000">::</font> {<b><font color="#000000">constraint</font></b>(), <font color="#009900">Reason</font>, <font color="#009900">Value</font>}
+
+<font color="#009900">Reason</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Value</font>  <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Reason for the constraint failure.</p>
+<p>It includes the constraint function in question, a machine-readable error reason and the value that made the constraint fail.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy">cowboy(3)</a>, <a href="../cowboy_router">cowboy_router(3)</a>, <a href="../cowboy_req.match_cookies">cowboy_req:match_cookies(3)</a>, <a href="../cowboy_req.match_qs">cowboy_req:match_qs(3)</a></p>
+
+
+
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+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
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+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+	
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+	
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+	
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+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_decompress_h/index.html b/docs/en/cowboy/2.13/manual/cowboy_decompress_h/index.html
new file mode 100644
index 00000000..442a17bc
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_decompress_h/index.html
@@ -0,0 +1,197 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
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+<h1 class="lined-header"><span>cowboy_decompress_h(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_decompress_h - Decompress stream handler</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_decompress_h</code> decompresses request bodies automatically when the server supports it.</p>
+<p>The only compression algorithm currently supported is the gzip algorithm. Another limitation is that decompression is only attempted when gzip is the only content-encoding in the request.</p>
+<p>This stream handler always adds a field to the Req object with the name <code>content_decoded</code> which is treated as a list of decoded content-encoding values. Currently this list may only contain the <code>&lt;&lt;&quot;gzip&quot;&gt;&gt;</code> binary if content was decoded; or be empty otherwise.</p>
+<h2 id="_options">Options</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+	<font color="#0000FF">decompress_enabled</font> <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+	<font color="#0000FF">decompress_ratio_limit</font> <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>()
+}</tt></pre>
+</div></div>
+<p>Configuration for the decompress stream handler.</p>
+<p>The default value is given next to the option name:</p>
+<dl><dt>decompress_ratio_limit (20)</dt>
+<dd><p>The max ratio of the compressed and decompressed body before it is rejected with a <code>413 Payload Too Large</code> error response.</p>
+<p>This option can be updated at any time using the <code>set_options</code> stream handler command.</p>
+</dd>
+<dt>decompress_enabled (true)</dt>
+<dd><p>Whether the handler is enabled by default.</p>
+<p>This option can be updated using the <code>set_options</code> stream handler command. This allows disabling decompression for the current stream. Attempts to enable or disable decompression after starting to read the body will be ignored.</p>
+</dd>
+</dl>
+<h2 id="_events">Events</h2>
+<p>The decompress stream handler does not produce any event.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: Module introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_compress_h">cowboy_compress_h(3)</a>, <a href="../cowboy_metrics_h">cowboy_metrics_h(3)</a>, <a href="../cowboy_stream_h">cowboy_stream_h(3)</a>, <a href="../cowboy_tracer_h">cowboy_tracer_h(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
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+<h4 id="docs-nav">Navigation</h4>
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+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/index.html
new file mode 100644
index 00000000..a9d08adc
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/index.html
@@ -0,0 +1,209 @@
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+
+<h1 class="lined-header"><span>cowboy_handler:terminate(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_handler:terminate - Terminate the handler</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">terminate</font></b>(<font color="#009900">Reason</font>, <font color="#009900">PartialReq</font>, <font color="#009900">State</font>, <font color="#009900">Handler</font>) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>
+
+<font color="#009900">Reason</font>     <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">PartialReq</font> <font color="#990000">::</font> <b><font color="#000000">map</font></b>()
+<font color="#009900">State</font>      <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Handler</font>    <font color="#990000">::</font> <b><font color="#000000">module</font></b>()</tt></pre>
+</div></div>
+<p>Call the optional terminate callback if it is defined.</p>
+<p>Make sure to use this function at the end of the execution of modules that implement custom handler behaviors.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Reason</dt>
+<dd><p>Reason for termination.</p>
+</dd>
+<dt>PartialReq</dt>
+<dd><p>The Req object.</p>
+<p>It is possible to remove fields from the Req object to save memory when the handler has no concept of requests/responses. The only requirement is that a map is provided.</p>
+</dd>
+<dt>State</dt>
+<dd><p>Handler state.</p>
+</dd>
+<dt>Handler</dt>
+<dd><p>Handler module.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Terminate a handler normally</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_handler:terminate</font></b>(<b><font color="#000080">normal</font></b>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#009900">Handler</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_handler">cowboy_handler(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_handler/index.html b/docs/en/cowboy/2.13/manual/cowboy_handler/index.html
new file mode 100644
index 00000000..b388f1e4
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_handler/index.html
@@ -0,0 +1,201 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+
+<h1 class="lined-header"><span>cowboy_handler(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_handler - Plain HTTP handlers</p>
+<h2 id="_description">Description</h2>
+<p>The <code>cowboy_handler</code> middleware executes the handler selected by the router or any other preceding middleware.</p>
+<p>This middleware takes the handler module and initial state from the <code>handler</code> and <code>handler_opts</code> environment values, respectively. On completion, it adds a <code>result</code> value to the middleware environment, containing the return value of the <code>terminate/3</code> callback (if defined) and <code>ok</code> otherwise.</p>
+<p>This module also defines a callback interface for handling HTTP requests.</p>
+<h2 id="_callbacks">Callbacks</h2>
+<p>Plain HTTP handlers implement the following interface:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<b><font color="#000000">terminate</font></b>(<font color="#009900">Reason</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>  <i><font color="#9A1900">%% optional</font></i>
+
+<font color="#009900">Req</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">State</font>  <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Reason</font> <font color="#990000">::</font> <b><font color="#000080">normal</font></b>
+        | {<font color="#FF6600">crash</font>, <font color="#FF6600">error</font> | <b><font color="#000080">exit</font></b> | <b><font color="#000080">throw</font></b>, <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>These two callbacks are common to all handlers.</p>
+<p>Plain HTTP handlers do all their work in the <code>init/2</code> callback. Returning <code>ok</code> terminates the handler. If no response is sent, Cowboy will send a <code>204 No Content</code>.</p>
+<p>The optional <code>terminate/3</code> callback will ultimately be called with the reason for the termination of the handler. Cowboy will terminate the process right after this. There is no need to perform any cleanup in this callback.</p>
+<p>The following terminate reasons are defined for plain HTTP handlers:</p>
+<dl><dt>normal</dt>
+<dd><p>The connection was closed normally.</p>
+</dd>
+<dt>{crash, Class, Reason}</dt>
+<dd><p>A crash occurred in the handler. <code>Class</code> and <code>Reason</code> can be used to obtain more information about the crash.</p>
+</dd>
+</dl>
+<h2 id="_exports">Exports</h2>
+<p>The following function should be called by modules implementing custom handlers to execute the optional terminate callback:</p>
+<ul><li><a href="../cowboy_handler.terminate">cowboy_handler:terminate(3)</a> - Terminate the handler
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_http/index.html b/docs/en/cowboy/2.13/manual/cowboy_http/index.html
new file mode 100644
index 00000000..6712b64e
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_http/index.html
@@ -0,0 +1,330 @@
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+<h1 class="lined-header"><span>cowboy_http(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_http - HTTP/1.1</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_http</code> implements HTTP/1.1 and HTTP/1.0 as a Ranch protocol.</p>
+<h2 id="_options">Options</h2>
+<!-- @todo Might be worth moving cowboy_clear/tls options-->
+<!-- to their respective manual, when they are added.-->
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">active_n</font>                   <font color="#990000">=&gt;</font> <b><font color="#000000">pos_integer</font></b>(),
+    <font color="#0000FF">alpn_default_protocol</font>      <font color="#990000">=&gt;</font> <font color="#FF6600">http</font> | <font color="#FF6600">http2</font>,
+    <font color="#0000FF">chunked</font>                    <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">connection_type</font>            <font color="#990000">=&gt;</font> <font color="#FF6600">worker</font> | <font color="#FF6600">supervisor</font>,
+    <font color="#0000FF">dynamic_buffer</font>             <font color="#990000">=&gt;</font> <font color="#000080">false</font> | {<b><font color="#000000">pos_integer</font></b>(), <b><font color="#000000">pos_integer</font></b>()},
+    <font color="#0000FF">hibernate</font>                  <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">http10_keepalive</font>           <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">idle_timeout</font>               <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">inactivity_timeout</font>         <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">initial_stream_flow_size</font>   <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">linger_timeout</font>             <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">logger</font>                     <font color="#990000">=&gt;</font> <b><font color="#000000">module</font></b>(),
+    <font color="#0000FF">max_empty_lines</font>            <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_header_name_length</font>     <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_header_value_length</font>    <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_headers</font>                <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_keepalive</font>              <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_method_length</font>          <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_request_line_length</font>    <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_skip_body_length</font>       <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">protocols</font>                  <font color="#990000">=&gt;</font> [<font color="#FF6600">http</font> | <font color="#FF6600">http2</font>],
+    <font color="#0000FF">proxy_header</font>               <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">request_timeout</font>            <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">reset_idle_timeout_on_send</font> <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">sendfile</font>                   <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">stream_handlers</font>            <font color="#990000">=&gt;</font> [<b><font color="#000000">module</font></b>()]
+}</tt></pre>
+</div></div>
+<p>Configuration for the HTTP/1.1 protocol.</p>
+<p>This configuration is passed to Cowboy when starting listeners using <code>cowboy:start_clear/3</code> or <code>cowboy:start_tls/3</code> functions.</p>
+<p>It can be updated without restarting listeners using the Ranch functions <code>ranch:get_protocol_options/1</code> and <code>ranch:set_protocol_options/2</code>.</p>
+<p>The default value is given next to the option name:</p>
+<dl><dt>active_n (1)</dt>
+<dd><p>The number of packets Cowboy will request from the socket at once. This can be used to tweak the performance of the server. Higher values reduce the number of times Cowboy need to request more packets from the port driver at the expense of potentially higher memory being used.</p>
+</dd>
+<dt>alpn_default_protocol (http)</dt>
+<dd><p>Default protocol to use when the client connects over TLS without ALPN. Can be set to <code>http2</code> to disable HTTP/1.1 entirely.</p>
+</dd>
+<dt>chunked (true)</dt>
+<dd><p>Whether chunked transfer-encoding is enabled for HTTP/1.1 connections. Note that a response streamed to the client without the chunked transfer-encoding and without a content-length header will result in the connection being closed at the end of the response body.</p>
+<p>This option can be updated at any time using the <code>set_options</code> stream handler command.</p>
+</dd>
+<dt>connection_type (supervisor)</dt>
+<dd><p>Whether the connection process also acts as a supervisor.</p>
+</dd>
+<dt>dynamic_buffer ({1024, 131072})</dt>
+<dd><p>Cowboy will dynamically change the socket&apos;s <code>buffer</code> size depending on the size of the data it receives from the socket. This lets Cowboy use the optimal buffer size for the current workload.</p>
+<p>The dynamic buffer size functionality can be disabled by setting this option to <code>false</code>. Cowboy will also disable it by default when the <code>buffer</code> transport option is configured.</p>
+</dd>
+<dt>hibernate (false)</dt>
+<dd><p>Whether the connection process will hibernate automatically.</p>
+</dd>
+<dt>http10_keepalive (true)</dt>
+<dd><p>Whether keep-alive is enabled for HTTP/1.0 connections.</p>
+</dd>
+<dt>idle_timeout (60000)</dt>
+<dd><p>Time in ms with no data received before Cowboy closes the connection.</p>
+<p>This option can be updated at any time using the <code>set_options</code> stream handler command.</p>
+</dd>
+<dt>inactivity_timeout (300000)</dt>
+<dd><p><strong></strong>DEPRECATED** Time in ms with nothing received at all before Cowboy closes the connection.</p>
+</dd>
+<dt>initial_stream_flow_size (65535)</dt>
+<dd><p>Amount of data in bytes Cowboy will read from the socket right after a request was fully received. This is a soft limit.</p>
+</dd>
+<dt>linger_timeout (1000)</dt>
+<dd><p>Time in ms that Cowboy will wait when closing the connection. This is necessary to avoid the TCP reset problem as described in the <a href="https://tools.ietf.org/html/rfc7230#section-6.6">section 6.6 of RFC7230</a>.</p>
+</dd>
+<dt>logger (error_logger)</dt>
+<dd><p>The module that will be used to write log messages.</p>
+</dd>
+<dt>max_empty_lines (5)</dt>
+<dd><p>Maximum number of empty lines before a request.</p>
+</dd>
+<dt>max_header_name_length (64)</dt>
+<dd><p>Maximum length of header names.</p>
+</dd>
+<dt>max_header_value_length (4096)</dt>
+<dd><p>Maximum length of header values.</p>
+</dd>
+<dt>max_headers (100)</dt>
+<dd><p>Maximum number of headers allowed per request.</p>
+</dd>
+<dt>max_keepalive (1000)</dt>
+<dd><p>Maximum number of requests allowed per connection.</p>
+</dd>
+<dt>max_method_length (32)</dt>
+<dd><p>Maximum length of the method.</p>
+</dd>
+<dt>max_request_line_length (8000)</dt>
+<dd><p>Maximum length of the request line.</p>
+</dd>
+<dt>max_skip_body_length (1000000)</dt>
+<dd><p>Maximum length Cowboy is willing to skip when the user code did not read the body fully. When the remaining length is too large or unknown Cowboy will close the connection.</p>
+</dd>
+<dt>protocols ([http2, http])</dt>
+<dd><p>Protocols that may be used when the client connects over cleartext TCP. The default is to allow both HTTP/1.1 and HTTP/2. HTTP/1.1 and HTTP/2 can be disabled entirely by omitting them from the list.</p>
+</dd>
+<dt>proxy_header (false)</dt>
+<dd><p>Whether incoming connections have a PROXY protocol header. The proxy information will be passed forward via the <code>proxy_header</code> key of the Req object.</p>
+</dd>
+<dt>request_timeout (5000)</dt>
+<dd><p>Time in ms with no requests before Cowboy closes the connection.</p>
+</dd>
+<dt>reset_idle_timeout_on_send (false)</dt>
+<dd><p>Whether the <code>idle_timeout</code> gets reset when sending data to the socket.</p>
+</dd>
+<dt>sendfile (true)</dt>
+<dd><p>Whether the sendfile syscall may be used. It can be useful to disable it on systems where the syscall has a buggy implementation, for example under VirtualBox when using shared folders.</p>
+</dd>
+<dt>stream_handlers ([cowboy_stream_h])</dt>
+<dd><p>Ordered list of stream handlers that will handle all stream events.</p>
+</dd>
+</dl>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.13</strong>: The <code>inactivity_timeout</code> option was deprecated.
+</li>
+<li><strong>2.13</strong>: The <code>active_n</code> default value was changed to <code>1</code>.
+</li>
+<li><strong>2.13</strong>: The <code>dynamic_buffer</code> and <code>hibernate</code> options were added.
+</li>
+<li><strong>2.11</strong>: The <code>reset_idle_timeout_on_send</code> option was added.
+</li>
+<li><strong>2.8</strong>: The <code>active_n</code> option was added.
+</li>
+<li><strong>2.7</strong>: The <code>initial_stream_flow_size</code> and <code>logger</code> options were added.
+</li>
+<li><strong>2.6</strong>: The <code>chunked</code>, <code>http10_keepalive</code>, <code>proxy_header</code> and <code>sendfile</code> options were added.
+</li>
+<li><strong>2.5</strong>: The <code>linger_timeout</code> option was added.
+</li>
+<li><strong>2.2</strong>: The <code>max_skip_body_length</code> option was added.
+</li>
+<li><strong>2.0</strong>: The <code>timeout</code> option was renamed <code>request_timeout</code>.
+</li>
+<li><strong>2.0</strong>: The <code>idle_timeout</code>, <code>inactivity_timeout</code> and <code>shutdown_timeout</code> options were added.
+</li>
+<li><strong>2.0</strong>: The <code>max_method_length</code> option was added.
+</li>
+<li><strong>2.0</strong>: The <code>max_request_line_length</code> default was increased from 4096 to 8000.
+</li>
+<li><strong>2.0</strong>: The <code>connection_type</code> option was added.
+</li>
+<li><strong>2.0</strong>: The <code>env</code> option is now a map instead of a proplist.
+</li>
+<li><strong>2.0</strong>: The <code>stream_handlers</code> option was added.
+</li>
+<li><strong>2.0</strong>: The <code>compress</code> option was removed in favor of the <code>cowboy_compress_h</code> stream handler.
+</li>
+<li><strong>2.0</strong>: Options are now a map instead of a proplist.
+</li>
+<li><strong>2.0</strong>: Protocol introduced. Replaces <code>cowboy_protocol</code>.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_http2">cowboy_http2(3)</a>, <a href="../cowboy_websocket">cowboy_websocket(3)</a></p>
+
+
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+<h3>
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+	2.13
+	Function Reference
+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_http2/index.html b/docs/en/cowboy/2.13/manual/cowboy_http2/index.html
new file mode 100644
index 00000000..4ee6893f
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_http2/index.html
@@ -0,0 +1,378 @@
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+<html lang="en">
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+
+<h1 class="lined-header"><span>cowboy_http2(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_http2 - HTTP/2</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_http2</code> implements HTTP/2 as a Ranch protocol.</p>
+<h2 id="_options">Options</h2>
+<!-- @todo Might be worth moving cowboy_clear/tls/stream_h options-->
+<!-- to their respective manual, when they are added.-->
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">active_n</font>                       <font color="#990000">=&gt;</font> <b><font color="#000000">pos_integer</font></b>(),
+    <font color="#0000FF">alpn_default_protocol</font>          <font color="#990000">=&gt;</font> <font color="#FF6600">http</font> | <font color="#FF6600">http2</font>,
+    <font color="#0000FF">connection_type</font>                <font color="#990000">=&gt;</font> <font color="#FF6600">worker</font> | <font color="#FF6600">supervisor</font>,
+    <font color="#0000FF">connection_window_margin_size</font>  <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">connection_window_update_threshold</font> <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">dynamic_buffer</font>                 <font color="#990000">=&gt;</font> <font color="#000080">false</font> | {<b><font color="#000000">pos_integer</font></b>(), <b><font color="#000000">pos_integer</font></b>()},
+    <font color="#0000FF">enable_connect_protocol</font>        <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">goaway_initial_timeout</font>         <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">goaway_complete_timeout</font>        <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">hibernate</font>                      <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">idle_timeout</font>                   <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">inactivity_timeout</font>             <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">initial_connection_window_size</font> <font color="#990000">=&gt;</font> <font color="#993399">65535</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">initial_stream_window_size</font>     <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">linger_timeout</font>                 <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">logger</font>                         <font color="#990000">=&gt;</font> <b><font color="#000000">module</font></b>(),
+    <font color="#0000FF">max_concurrent_streams</font>         <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>() | <font color="#FF6600">infinity</font>,
+    <font color="#0000FF">max_connection_buffer_size</font>     <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_connection_window_size</font>     <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">max_decode_table_size</font>          <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_encode_table_size</font>          <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_fragmented_header_block_size</font> <font color="#990000">=&gt;</font> <font color="#993399">16384</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">max_frame_size_received</font>        <font color="#990000">=&gt;</font> <font color="#993399">16384</font><font color="#990000">..</font><font color="#993399">16777215</font>,
+    <font color="#0000FF">max_frame_size_sent</font>            <font color="#990000">=&gt;</font> <font color="#993399">16384</font><font color="#990000">..</font><font color="#993399">16777215</font> | <font color="#FF6600">infinity</font>,
+    <font color="#0000FF">max_received_frame_rate</font>        <font color="#990000">=&gt;</font> {<b><font color="#000000">pos_integer</font></b>(), <b><font color="#000000">timeout</font></b>()},
+    <font color="#0000FF">max_reset_stream_rate</font>          <font color="#990000">=&gt;</font> {<b><font color="#000000">pos_integer</font></b>(), <b><font color="#000000">timeout</font></b>()},
+    <font color="#0000FF">max_cancel_stream_rate</font>         <font color="#990000">=&gt;</font> {<b><font color="#000000">pos_integer</font></b>(), <b><font color="#000000">timeout</font></b>()},
+    <font color="#0000FF">max_stream_buffer_size</font>         <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">max_stream_window_size</font>         <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">preface_timeout</font>                <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">protocols</font>                      <font color="#990000">=&gt;</font> [<font color="#FF6600">http</font> | <font color="#FF6600">http2</font>],
+    <font color="#0000FF">proxy_header</font>                   <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">reset_idle_timeout_on_send</font>     <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">sendfile</font>                       <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">settings_timeout</font>               <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">stream_handlers</font>                <font color="#990000">=&gt;</font> [<b><font color="#000000">module</font></b>()],
+    <font color="#0000FF">stream_window_data_threshold</font>   <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">stream_window_margin_size</font>      <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>,
+    <font color="#0000FF">stream_window_update_threshold</font> <font color="#990000">=&gt;</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">16#7fffffff</font>
+}</tt></pre>
+</div></div>
+<p>Configuration for the HTTP/2 protocol.</p>
+<p>This configuration is passed to Cowboy when starting listeners using <code>cowboy:start_clear/3</code> or <code>cowboy:start_tls/3</code> functions.</p>
+<p>It can be updated without restarting listeners using the Ranch functions <code>ranch:get_protocol_options/1</code> and <code>ranch:set_protocol_options/2</code>.</p>
+<p>The default value is given next to the option name:</p>
+<dl><dt>active_n (1)</dt>
+<dd><p>The number of packets Cowboy will request from the socket at once. This can be used to tweak the performance of the server. Higher values reduce the number of times Cowboy need to request more packets from the port driver at the expense of potentially higher memory being used.</p>
+</dd>
+<dt>alpn_default_protocol (http)</dt>
+<dd><p>Default protocol to use when the client connects over TLS without ALPN. Can be set to <code>http2</code> to disable HTTP/1.1 entirely.</p>
+</dd>
+<dt>connection_type (supervisor)</dt>
+<dd><p>Whether the connection process also acts as a supervisor.</p>
+</dd>
+<dt>connection_window_margin_size (65535)</dt>
+<dd><p>Extra amount in bytes to be added to the window size when updating the connection window. This is used to ensure that there is always some space available in the window.</p>
+</dd>
+<dt>connection_window_update_threshold (163840)</dt>
+<dd><p>The connection window will only get updated when its size becomes lower than this threshold, in bytes. This is to avoid sending too many <code>WINDOW_UPDATE</code> frames.</p>
+</dd>
+<dt>dynamic_buffer ({1024, 131072})</dt>
+<dd><p>Cowboy will dynamically change the socket&apos;s <code>buffer</code> size depending on the size of the data it receives from the socket. This lets Cowboy use the optimal buffer size for the current workload.</p>
+<p>The dynamic buffer size functionality can be disabled by setting this option to <code>false</code>. Cowboy will also disable it by default when the <code>buffer</code> transport option is configured.</p>
+</dd>
+<dt>enable_connect_protocol (false)</dt>
+<dd><p>Whether to enable the extended CONNECT method to allow protocols like Websocket to be used over an HTTP/2 stream.</p>
+<p>For backward compatibility reasons, this option is disabled by default. It must be enabled to use Websocket over HTTP/2. It will be enabled by default in a future release.</p>
+</dd>
+<dt>goaway_initial_timeout (1000)</dt>
+<dd><p>Time in ms to wait for any in-flight stream creations before stopping to accept new streams on an existing connection during a graceful shutdown.</p>
+</dd>
+<dt>goaway_complete_timeout (3000)</dt>
+<dd><p>Time in ms to wait for ongoing streams to complete before closing the connection during a graceful shutdown.</p>
+</dd>
+<dt>hibernate (false)</dt>
+<dd><p>Whether the connection process will hibernate automatically.</p>
+</dd>
+<dt>idle_timeout (60000)</dt>
+<dd><p>Time in ms with no data received before Cowboy closes the connection.</p>
+</dd>
+<dt>inactivity_timeout (300000)</dt>
+<dd><p><strong></strong>DEPRECATED** Time in ms with nothing received at all before Cowboy closes the connection.</p>
+</dd>
+<dt>initial_connection_window_size (65535)</dt>
+<dd><p>Initial window size in bytes for the connection. This is the total amount of data (from request bodies for example) that may be buffered by the connection across all streams before the user code explicitly requests it.</p>
+<p>Note that this value cannot be lower than the default.</p>
+</dd>
+<dt>initial_stream_window_size (65535)</dt>
+<dd><p>Initial window size in bytes for new streams. This is the total amount of data (from request bodies for example) that may be buffered by a single stream before the user code explicitly requests it.</p>
+</dd>
+<dt>linger_timeout (1000)</dt>
+<dd><p>Time in ms that Cowboy will wait when closing the connection. This is necessary to avoid the TCP reset problem as described in the <a href="https://tools.ietf.org/html/rfc7230#section-6.6">section 6.6 of RFC7230</a>. In HTTP/2&apos;s case the GOAWAY message might also be lost when closing the connection immediately.</p>
+</dd>
+<dt>logger (error_logger)</dt>
+<dd><p>The module that will be used to write log messages.</p>
+</dd>
+<dt>max_concurrent_streams (infinity)</dt>
+<dd><p>Maximum number of concurrent streams allowed on the connection.</p>
+</dd>
+<dt>max_connection_buffer_size (16000000)</dt>
+<dd><p>Maximum size of all stream buffers for this connection, in bytes. This is a soft limit used to apply backpressure to handlers that send data faster than the HTTP/2 connection allows.</p>
+</dd>
+<dt>max_connection_window_size (16#7fffffff)</dt>
+<dd><p>Maximum connection window size in bytes. This is used as an upper bound when calculating the window size, either when reading the request body or receiving said body.</p>
+</dd>
+<dt>max_decode_table_size (4096)</dt>
+<dd><p>Maximum header table size in bytes used by the decoder. This is the value advertised to the client. The client can then choose a header table size equal or lower to the advertised value.</p>
+</dd>
+<dt>max_encode_table_size (4096)</dt>
+<dd><p>Maximum header table size in bytes used by the encoder. The server will compare this value to what the client advertises and choose the smallest one as the encoder&apos;s header table size.</p>
+</dd>
+<dt>max_fragmented_header_block_size (32768)</dt>
+<dd><p>Maximum header block size when headers are split over multiple HEADERS and CONTINUATION frames. Clients that attempt to send header blocks larger than this value will receive an ENHANCE_YOUR_CALM connection error. Note that this value is not advertised and should be large enough for legitimate requests.</p>
+</dd>
+<dt>max_frame_size_received (16384)</dt>
+<dd><p>Maximum size in bytes of the frames received by the server. This value is advertised to the remote endpoint which can then decide to use any value lower or equal for its frame sizes.</p>
+<p>It is highly recommended to increase this value for performance reasons. In a future Cowboy version the default will be increased to 1MB (1048576). Too low values may result in very large file uploads failing because Cowboy will detect the large number of frames as flood and close the connection.</p>
+</dd>
+<dt>max_frame_size_sent (infinity)</dt>
+<dd><p>Maximum size in bytes of the frames sent by the server. This option allows setting an upper limit to the frame sizes instead of blindly following the client&apos;s advertised maximum.</p>
+<p>Note that actual frame sizes may be lower than the limit when there is not enough space left in the flow control window.</p>
+</dd>
+<dt>max_received_frame_rate ({10000, 10000})</dt>
+<dd><p>Maximum frame rate allowed per connection. The rate is expressed as a tuple <code>{NumFrames, TimeMs}</code> indicating how many frames are allowed over the given time period. This is similar to a supervisor restart intensity/period.</p>
+</dd>
+<dt>max_reset_stream_rate ({10, 10000})</dt>
+<dd><p>Maximum reset stream rate per connection. This can be used to protect against misbehaving or malicious peers that do not follow the protocol, leading to the server resetting streams, by limiting the number of streams that can be reset over a certain time period. The rate is expressed as a tuple <code>{NumResets, TimeMs}</code>. This is similar to a supervisor restart intensity/period.</p>
+</dd>
+<dt>max_cancel_stream_rate ({500, 10000})</dt>
+<dd><p>Maximum cancel stream rate per connection. This can be used to protect against misbehaving or malicious peers, by limiting the number of streams that the peer can reset over a certain time period. The rate is expressed as a tuple <code>{NumCancels, TimeMs}</code>. This is similar to a supervisor restart intensity/period.</p>
+</dd>
+<dt>max_stream_buffer_size (8000000)</dt>
+<dd><p>Maximum stream buffer size in bytes. This is a soft limit used to apply backpressure to handlers that send data faster than the HTTP/2 connection allows.</p>
+</dd>
+<dt>max_stream_window_size (16#7fffffff)</dt>
+<dd><p>Maximum stream window size in bytes. This is used as an upper bound when calculating the window size, either when reading the request body or receiving said body.</p>
+</dd>
+<dt>preface_timeout (5000)</dt>
+<dd><p>Time in ms Cowboy is willing to wait for the connection preface.</p>
+</dd>
+<dt>protocols ([http2, http])</dt>
+<dd><p>Protocols that may be used when the client connects over cleartext TCP. The default is to allow both HTTP/1.1 and HTTP/2. HTTP/1.1 and HTTP/2 can be disabled entirely by omitting them from the list.</p>
+</dd>
+<dt>proxy_header (false)</dt>
+<dd><p>Whether incoming connections have a PROXY protocol header. The proxy information will be passed forward via the <code>proxy_header</code> key of the Req object.</p>
+</dd>
+<dt>reset_idle_timeout_on_send (false)</dt>
+<dd><p>Whether the <code>idle_timeout</code> gets reset when sending data to the socket.</p>
+</dd>
+<dt>sendfile (true)</dt>
+<dd><p>Whether the sendfile syscall may be used. It can be useful to disable it on systems where the syscall has a buggy implementation, for example under VirtualBox when using shared folders.</p>
+</dd>
+<dt>settings_timeout (5000)</dt>
+<dd><p>Time in ms Cowboy is willing to wait for a SETTINGS ack.</p>
+</dd>
+<dt>stream_handlers ([cowboy_stream_h])</dt>
+<dd><p>Ordered list of stream handlers that will handle all stream events.</p>
+</dd>
+<dt>stream_window_data_threshold (16384)</dt>
+<dd><p>Window threshold in bytes below which Cowboy will not attempt to send data, with one exception. When Cowboy has data to send and the window is high enough, Cowboy will always send the data, regardless of this option.</p>
+</dd>
+<dt>stream_window_margin_size (65535)</dt>
+<dd><p>Extra amount in bytes to be added to the window size when updating a stream&apos;s window. This is used to ensure that there is always some space available in the window.</p>
+</dd>
+<dt>stream_window_update_threshold (163840)</dt>
+<dd><p>A stream&apos;s window will only get updated when its size becomes lower than this threshold, in bytes. This is to avoid sending too many <code>WINDOW_UPDATE</code> frames.</p>
+</dd>
+</dl>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.13</strong>: The <code>inactivity_timeout</code> option was deprecated.
+</li>
+<li><strong>2.13</strong>: The <code>active_n</code> default value was changed to <code>1</code>.
+</li>
+<li><strong>2.13</strong>: The <code>dynamic_buffer</code> and <code>hibernate</code> options were added.
+</li>
+<li><strong>2.11</strong>: Websocket over HTTP/2 is now considered stable.
+</li>
+<li><strong>2.11</strong>: The <code>reset_idle_timeout_on_send</code> option was added.
+</li>
+<li><strong>2.11</strong>: Add the option <code>max_cancel_stream_rate</code> to protect against another flood scenario.
+</li>
+<li><strong>2.9</strong>: The <code>goaway_initial_timeout</code> and <code>goaway_complete_timeout</code> options were added.
+</li>
+<li><strong>2.8</strong>: The <code>active_n</code> option was added.
+</li>
+<li><strong>2.8</strong>: The <code>linger_timeout</code> option was added.
+</li>
+<li><strong>2.8</strong>: The <code>max_received_frame_rate</code> default value has been multiplied by 10 as the default was too low.
+</li>
+<li><strong>2.7</strong>: Add the options <code>connection_window_margin_size</code>, <code>connection_window_update_threshold</code>, <code>max_connection_window_size</code>, <code>max_stream_window_size</code>, <code>stream_window_margin_size</code> and <code>stream_window_update_threshold</code> to configure behavior on sending WINDOW_UPDATE frames; <code>max_connection_buffer_size</code> and <code>max_stream_buffer_size</code> to apply backpressure when sending data too fast; <code>max_received_frame_rate</code> and <code>max_reset_stream_rate</code> to protect against various flood scenarios; and <code>stream_window_data_threshold</code> to control how small the DATA frames that Cowboy sends can get.
+</li>
+<li><strong>2.7</strong>: The <code>logger</code> option was added.
+</li>
+<li><strong>2.6</strong>: The <code>proxy_header</code> and <code>sendfile</code> options were added.
+</li>
+<li><strong>2.4</strong>: Add the options <code>initial_connection_window_size</code>, <code>initial_stream_window_size</code>, <code>max_concurrent_streams</code>, <code>max_decode_table_size</code>, <code>max_encode_table_size</code>, <code>max_frame_size_received</code>, <code>max_frame_size_sent</code> and <code>settings_timeout</code> to configure HTTP/2 SETTINGS and related behavior.
+</li>
+<li><strong>2.4</strong>: Add the option <code>enable_connect_protocol</code>.
+</li>
+<li><strong>2.0</strong>: Protocol introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_http">cowboy_http(3)</a>, <a href="../cowboy_websocket">cowboy_websocket(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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+<div id="contents" class="two_col">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_loop(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_loop - Loop handlers</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_loop</code> defines a callback interface for long running HTTP connections.</p>
+<p>You should switch to this behavior for long polling, server-sent events and similar long-running requests.</p>
+<p>There are generally two usage patterns:</p>
+<ul><li>Loop until receiving a specific message, then send a response and stop execution (for example long polling);
+</li>
+<li>Or initiate a response in <code>init/2</code> and stream the body in <code>info/3</code> as necessary (for example server-sent events).
+</li>
+</ul>
+<h2 id="_callbacks">Callbacks</h2>
+<p>Loop handlers implement the following interface:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">cowboy_loop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+     | {<font color="#FF6600">cowboy_loop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#FF6600">hibernate</font> | <b><font color="#000000">timeout</font></b>()}
+
+<b><font color="#000000">info</font></b>(<font color="#009900">Info</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+     | {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#FF6600">hibernate</font> | <b><font color="#000000">timeout</font></b>()}
+     | {<font color="#FF6600">stop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<b><font color="#000000">terminate</font></b>(<font color="#009900">Reason</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>  <i><font color="#9A1900">%% optional</font></i>
+
+<font color="#009900">Req</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">State</font>  <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Info</font>   <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Reason</font> <font color="#990000">::</font> <font color="#FF6600">stop</font>
+        | {<font color="#FF6600">crash</font>, <font color="#FF6600">error</font> | <b><font color="#000080">exit</font></b> | <b><font color="#000080">throw</font></b>, <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>The <code>init/2</code> callback is common to all handlers. To switch to the loop behavior, it must return <code>cowboy_loop</code> as the first element of the tuple.</p>
+<p>The <code>info/3</code> callback will be called for every Erlang message received. It may choose to continue the receive loop or stop it.</p>
+<p>The optional <code>terminate/3</code> callback will ultimately be called with the reason for the termination of the handler. Cowboy will terminate the process right after this. There is no need to perform any cleanup in this callback.</p>
+<p>The following terminate reasons are defined for loop handlers:</p>
+<dl><dt>stop</dt>
+<dd><p>The handler requested to close the connection by returning a <code>stop</code> tuple.</p>
+</dd>
+<dt>{crash, Class, Reason}</dt>
+<dd><p>A crash occurred in the handler. <code>Class</code> and <code>Reason</code> can be used to obtain more information about the crash.</p>
+</dd>
+</dl>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: A timeout may be returned instead of <code>hibernate</code>. It functions the same way as the <code>gen_server</code> timeout.
+</li>
+<li><strong>2.0</strong>: Loop handlers no longer need to handle socket events.
+</li>
+<li><strong>1.0</strong>: Behavior introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_handler">cowboy_handler(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_metrics_h/index.html b/docs/en/cowboy/2.13/manual/cowboy_metrics_h/index.html
new file mode 100644
index 00000000..e546dd31
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_metrics_h/index.html
@@ -0,0 +1,292 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+<div id="contents" class="two_col">
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+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_metrics_h(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_metrics_h - Metrics stream handler</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_metrics_h</code> gathers metrics and other information about a stream. It then calls the configured callback with this data.</p>
+<h2 id="_types">Types</h2>
+<h3 id="_metrics">metrics()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">metrics</font></b>() <font color="#990000">::</font> #{
+    <i><font color="#9A1900">%% The identifier for this listener.</font></i>
+    <font color="#FF6600">ref</font> <font color="#990000">:=</font> <b><font color="#000000">ranch:ref</font></b>(),
+
+    <i><font color="#9A1900">%% The pid for this connection.</font></i>
+    <font color="#FF6600">pid</font> <font color="#990000">:=</font> <b><font color="#000080">pid</font></b>(),
+
+    <i><font color="#9A1900">%% The streamid also indicates the total number of requests on</font></i>
+    <i><font color="#9A1900">%% this connection (StreamID div 2 + 1).</font></i>
+    <font color="#FF6600">streamid</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy_stream:streamid</font></b>(),
+
+    <i><font color="#9A1900">%% The terminate reason is always useful.</font></i>
+    <font color="#FF6600">reason</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy_stream:reason</font></b>(),
+
+    <i><font color="#9A1900">%% A filtered Req object or a partial Req object</font></i>
+    <i><font color="#9A1900">%% depending on how far the request got to.</font></i>
+    <font color="#0000FF">req</font> <font color="#990000">=&gt;</font> <b><font color="#000000">cowboy_req:req</font></b>(),
+    <font color="#0000FF">partial_req</font> <font color="#990000">=&gt;</font> <b><font color="#000000">cowboy_stream:partial_req</font></b>(),
+
+    <i><font color="#9A1900">%% Response status.</font></i>
+    <font color="#FF6600">resp_status</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy:http_status</font></b>(),
+
+    <i><font color="#9A1900">%% Filtered response headers.</font></i>
+    <font color="#FF6600">resp_headers</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy:http_headers</font></b>(),
+
+    <i><font color="#9A1900">%% Start/end of the processing of the request.</font></i>
+    <i><font color="#9A1900">%%</font></i>
+    <i><font color="#9A1900">%% This represents the time from this stream handler's init</font></i>
+    <i><font color="#9A1900">%% to terminate.</font></i>
+    <font color="#0000FF">req_start</font> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+    <font color="#0000FF">req_end</font> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+
+    <i><font color="#9A1900">%% Start/end of the receiving of the request body.</font></i>
+    <i><font color="#9A1900">%% Begins when the first packet has been received.</font></i>
+    <font color="#0000FF">req_body_start</font> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+    <font color="#0000FF">req_body_end</font> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+
+    <i><font color="#9A1900">%% Start/end of the sending of the response.</font></i>
+    <i><font color="#9A1900">%% Begins when we send the headers and ends on the final</font></i>
+    <i><font color="#9A1900">%% packet of the response body. If everything is sent at</font></i>
+    <i><font color="#9A1900">%% once these values are identical.</font></i>
+    <font color="#0000FF">resp_start</font> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+    <font color="#0000FF">resp_end</font> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+
+    <i><font color="#9A1900">%% For early errors all we get is the time we received it.</font></i>
+    <font color="#0000FF">early_error_time</font> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+
+    <i><font color="#9A1900">%% Start/end of spawned processes. This is where most of</font></i>
+    <i><font color="#9A1900">%% the user code lies, excluding stream handlers. On a</font></i>
+    <i><font color="#9A1900">%% default Cowboy configuration there should be only one</font></i>
+    <i><font color="#9A1900">%% process: the request process.</font></i>
+    <font color="#0000FF">procs</font> <font color="#990000">=&gt;</font> <font color="#009900">ProcMetrics</font>,
+
+    <i><font color="#9A1900">%% Informational responses sent before the final response.</font></i>
+    <font color="#0000FF">informational</font> <font color="#990000">=&gt;</font> [<font color="#009900">InformationalMetrics</font>],
+
+    <i><font color="#9A1900">%% Length of the request and response bodies. This does</font></i>
+    <i><font color="#9A1900">%% not include the framing.</font></i>
+    <font color="#0000FF">req_body_length</font> <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+    <font color="#0000FF">resp_body_length</font> <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>(),
+
+    <i><font color="#9A1900">%% Additional metadata set by the user.</font></i>
+    <font color="#0000FF">user_data</font> <font color="#990000">=&gt;</font> <b><font color="#000000">map</font></b>()
+}
+
+<font color="#009900">InformationalMetrics</font> <font color="#990000">::</font> #{
+    <i><font color="#9A1900">%% Informational response status.</font></i>
+    <font color="#FF6600">status</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy:http_status</font></b>(),
+
+    <i><font color="#9A1900">%% Headers sent with the informational response.</font></i>
+    <font color="#FF6600">headers</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy:http_headers</font></b>(),
+
+    <i><font color="#9A1900">%% Time when the informational response was sent.</font></i>
+    <font color="#FF6600">time</font> <font color="#990000">:=</font> <b><font color="#000080">integer</font></b>()
+}
+
+<font color="#009900">ProcMetrics</font> <font color="#990000">::</font> #{<b><font color="#000080">pid</font></b>() <font color="#990000">=&gt;</font> #{
+    <i><font color="#9A1900">%% Time at which the process spawned.</font></i>
+    <font color="#FF6600">spawn</font> <font color="#990000">:=</font> <b><font color="#000080">integer</font></b>(),
+
+    <i><font color="#9A1900">%% Time at which the process exited.</font></i>
+    <b><font color="#000080">exit</font></b> <font color="#990000">=&gt;</font> <b><font color="#000080">integer</font></b>(),
+
+    <i><font color="#9A1900">%% Reason for the process exit.</font></i>
+    <font color="#0000FF">reason</font> <font color="#990000">=&gt;</font> <b><font color="#000000">any</font></b>()
+}}</tt></pre>
+</div></div>
+<p>Metrics given to the callback function.</p>
+<p>Depending on the life of the stream the metrics may include more or less information.</p>
+<p>The <code>set_options</code> command can be used to add additional metadata in the <code>user_data</code> metric. This can be used for example to add the handler module which was selected by the router. The option to be set is <code>metrics_user_data</code>. It takes a map which will be merged in the existing <code>user_data</code> map.</p>
+<h2 id="_options">Options</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">metrics_callback</font> <font color="#990000">=&gt;</font> <b><font color="#0000FF">fun</font></b>((<b><font color="#000000">metrics</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">any</font></b>()),
+    <font color="#0000FF">metrics_req_filter</font> <font color="#990000">=&gt;</font> <b><font color="#0000FF">fun</font></b>((<b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">map</font></b>()),
+    <font color="#0000FF">metrics_resp_headers_filter</font> <font color="#990000">=&gt;</font> <b><font color="#0000FF">fun</font></b>((<b><font color="#000000">cowboy:http_headers</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">cowboy:http_headers</font></b>())
+}</tt></pre>
+</div></div>
+<p>Configuration for the metrics stream handler.</p>
+<dl><dt>metrics_callback - mandatory</dt>
+<dd><p>The function that will be called upon completion of the stream. It only takes a single argument, the <code>metrics()</code>.</p>
+</dd>
+<dt>metrics_req_filter</dt>
+<dd><p>A function applied to the Req to compact it and only keep required information. By default no filtering is done.</p>
+</dd>
+<dt>metrics_resp_headers_filter</dt>
+<dd><p>A function applied to the response headers to filter them and only keep required information. By default no filtering is done.</p>
+</dd>
+</dl>
+<h2 id="_events">Events</h2>
+<p>The metrics stream handler does not produce any event.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.7</strong>: Module introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_compress_h">cowboy_compress_h(3)</a>, <a href="../cowboy_decompress_h">cowboy_decompress_h(3)</a>, <a href="../cowboy_stream_h">cowboy_stream_h(3)</a>, <a href="../cowboy_tracer_h">cowboy_tracer_h(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.13/manual/cowboy_middleware/index.html
new file mode 100644
index 00000000..391dc32b
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_middleware/index.html
@@ -0,0 +1,212 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="contents" class="two_col">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_middleware(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_middleware - Middlewares</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_middleware</code> defines a callback interface for Cowboy middlewares.</p>
+<p>Middlewares process the request sequentially in the order they are configured.</p>
+<h2 id="_callbacks">Callbacks</h2>
+<p>Middlewares implement the following interface:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">execute</font></b>(<font color="#009900">Req</font>, <font color="#009900">Env</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">Env</font>}
+     | {<font color="#FF6600">suspend</font>, <b><font color="#000000">module</font></b>(), <b><font color="#000080">atom</font></b>(), [<b><font color="#000000">any</font></b>()]}
+     | {<font color="#FF6600">stop</font>, <font color="#009900">Req</font>}
+
+<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">Env</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_middleware:env</font></b>()</tt></pre>
+</div></div>
+<p>The <code>execute/2</code> is the only callback that needs to be implemented. It must execute the middleware and return with instructions for Cowboy.</p>
+<dl><dt>ok</dt>
+<dd><p>Cowboy should continue processing the request using the returned Req object and environment.</p>
+</dd>
+<dt>suspend</dt>
+<dd><p>Cowboy will hibernate the process. When resuming, Cowboy will apply the returned module, function and arguments.</p>
+</dd>
+<dt>stop</dt>
+<dd><p>Cowboy will stop middleware execution. No other middleware will be executed. This effectively ends the processing of the request.</p>
+</dd>
+</dl>
+<!-- @todo No need to return the Req when stopping. Fix in 3.0.-->
+<h2 id="_types">Types</h2>
+<h3 id="_env">env()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">env</font></b>() <font color="#990000">::</font> #{<b><font color="#000080">atom</font></b>() <font color="#990000">=&gt;</font> <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>Middleware environment.</p>
+<p>A new environment is created for every request. The initial environment contained the user configured environment values (like <code>dispatch</code> for example) plus the <code>listener</code> value which contains the name of the listener for this connection.</p>
+<p>Middlewares may modify the environment as necessary.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: The <code>env</code> type is now a map instead of a proplist.
+</li>
+<li><strong>1.0</strong>: Behavior introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.binding/index.html
new file mode 100644
index 00000000..163924eb
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.binding/index.html
@@ -0,0 +1,215 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:binding(3)</title>
+
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+
+<h1 class="lined-header"><span>cowboy_req:binding(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:binding - Access a value bound from the route</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">binding</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>)          <font color="#990000">-&gt;</font> <b><font color="#000000">binding</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>, <font color="#000080">undefined</font>)
+<b><font color="#000000">binding</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>, <font color="#009900">Default</font>) <font color="#990000">-&gt;</font> <b><font color="#000000">any</font></b>() | <font color="#009900">Default</font>
+
+<font color="#009900">Name</font>    <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()
+<font color="#009900">Req</font>     <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Return the value for the given binding.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Desired binding name as an atom.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Default</dt>
+<dd><p>Default value returned when the binding is missing.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>By default the value is a case sensitive binary string, however constraints may change the type of this value (for example automatically converting numbers to integer).</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the value is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the username from the path</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% Route is "/users/:user"</font></i>
+<font color="#009900">Username</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:binding</font></b>(<font color="#FF6600">user</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Get the branch name, with a default</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% Route is "/log[/:branch]"</font></i>
+<font color="#009900">Branch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:binding</font></b>(<font color="#FF6600">branch</font>, <font color="#009900">Req</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"master"</font><font color="#990000">&gt;&gt;</font>)</tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a>, <a href="../cowboy_req.host_info">cowboy_req:host_info(3)</a>, <a href="../cowboy_req.path_info">cowboy_req:path_info(3)</a>, <a href="../cowboy_router">cowboy_router(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<input type="hidden" name="business" value="essen@ninenines.eu">
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+<input type="hidden" name="currency_code" value="EUR">
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+    <script src="/js/custom.js"></script>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.bindings/index.html
new file mode 100644
index 00000000..76512b04
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.bindings/index.html
@@ -0,0 +1,195 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+
+<h1 class="lined-header"><span>cowboy_req:bindings(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:bindings - Access all values bound from the route</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">bindings</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">cowboy_router:bindings</font></b>()</tt></pre>
+</div></div>
+<p>Return a map containing all bindings.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>By default values are case sensitive binary strings, however constraints may change the type of this value (for example automatically converting numbers to integer).</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the values are returned, they are no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get all bindings</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Bindings</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:bindings</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.binding">cowboy_req:binding(3)</a>, <a href="../cowboy_req.host_info">cowboy_req:host_info(3)</a>, <a href="../cowboy_req.path_info">cowboy_req:path_info(3)</a>, <a href="../cowboy_router">cowboy_router(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.body_length/index.html
new file mode 100644
index 00000000..3f5ccb3b
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.body_length/index.html
@@ -0,0 +1,196 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:body_length(3)</title>
+
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+<div id="contents" class="two_col">
+<div class="container">
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+
+<h1 class="lined-header"><span>cowboy_req:body_length(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:body_length - Body length</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">body_length</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#000080">undefined</font> | <b><font color="#000000">non_neg_integer</font></b>()</tt></pre>
+</div></div>
+<p>Return the length of the request body.</p>
+<p>The length is not always known before reading the body. In those cases Cowboy will return <code>undefined</code>. The body length is available after the body has been fully read.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The length of the request body, or <code>undefined</code> if it is not known.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the length is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the body length</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Length</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:body_length</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a>, <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a>, <a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a>, <a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a>, <a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<input type="hidden" name="business" value="essen@ninenines.eu">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.cast/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.cast/index.html
new file mode 100644
index 00000000..18b94a08
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.cast/index.html
@@ -0,0 +1,224 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:cast(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
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+            
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+                </ul>
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+
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+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:cast(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:cast - Cast a stream handler event</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cast</font></b>(<font color="#009900">Event</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>(), <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font></tt></pre>
+</div></div>
+<p>Cast a stream handler event.</p>
+<p>The event will be passed to stream handlers through the <code>info/3</code> callback.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Event</dt>
+<dd><p>The event to be sent to stream handlers.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.7</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Read the body using auto mode</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_body_auto_async</font></b>(<font color="#009900">Req</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#000000">read_body_auto_async</font></b>(<font color="#009900">Req</font>, <b><font color="#000080">make_ref</font></b>(), <font color="#990000">&lt;&lt;&gt;&gt;</font>)<font color="#990000">.</font>
+
+<b><font color="#000000">read_body_auto_async</font></b>(<font color="#009900">Req</font>, <font color="#009900">Ref</font>, <font color="#009900">Acc</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#000000">cowboy_req:cast</font></b>({<font color="#FF6600">read_body</font>, <b><font color="#000080">self</font></b>(), <font color="#009900">Ref</font>, <font color="#FF6600">auto</font>, <font color="#FF6600">infinity</font>}, <font color="#009900">Req</font>),
+    <b><font color="#0000FF">receive</font></b>
+        {<font color="#FF6600">request_body</font>, <font color="#009900">Ref</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Data</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">read_body_auto_async</font></b>(<font color="#009900">Req</font>, <font color="#009900">Ref</font>, <font color="#990000">&lt;&lt;</font><font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b><font color="#990000">&gt;&gt;</font>);
+        {<font color="#FF6600">request_body</font>, <font color="#009900">Ref</font>, <font color="#FF6600">fin</font>, <font color="#009900">_BodyLen</font>, <font color="#009900">Data</font>} <font color="#990000">-&gt;</font>
+            {<font color="#FF6600">ok</font>, <font color="#990000">&lt;&lt;</font><font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>}
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Increase the HTTP/1.1 idle timeout</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:cast</font></b>({<font color="#FF6600">set_options</font>, #{
+    <font color="#0000FF">idle_timeout</font> <font color="#990000">=&gt;</font> <font color="#993399">3600000</font>
+}}, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Add user data to metrics</div>
+<div class="content"><pre>cowboy_req:cast({set_options, #{
+    metrics_user_data =&gt; #{handler =&gt; ?MODULE}
+}}, Req).</pre></div></div>
+<div class="listingblock"><div class="title">Enable compression buffering</div>
+<div class="content"><pre>cowboy_req:cast({set_options, #{
+    compress_buffering =&gt; true
+}}, Req).</pre></div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_stream">cowboy_stream(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.cert/index.html
new file mode 100644
index 00000000..db0fba4c
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.cert/index.html
@@ -0,0 +1,215 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:cert(3)</title>
+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:cert(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:cert - Client TLS certificate</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cert</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000080">binary</font></b>() | <font color="#000080">undefined</font></tt></pre>
+</div></div>
+<p>Return the peer&apos;s TLS certificate.</p>
+<p>Using the default configuration this function will always return <code>undefined</code>. You need to explicitly configure Cowboy to request the client certificate. To do this you need to set the <code>verify</code> transport option to <code>verify_peer</code>:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_tls</font></b>(<font color="#FF6600">example</font>, [
+    {<font color="#FF6600">port</font>, <font color="#993399">8443</font>},
+    {<font color="#FF6600">certfile</font>, <font color="#FF0000">"path/to/cert.pem"</font>},
+    {<font color="#FF6600">verify</font>, <font color="#FF6600">verify_peer</font>}
+], #{
+    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
+})<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>You may also want to customize the <code>verify_fun</code> function. Please consult the <code>ssl</code> application&apos;s manual for more details.</p>
+<p>TCP connections do not allow a certificate and this function will therefore always return <code>undefined</code>.</p>
+<p>The certificate can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">cert</font> <font color="#990000">:=</font> <font color="#009900">Cert</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The client TLS certificate.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.1</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the client TLS certificate.</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Cert</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:cert</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.peer">cowboy_req:peer(3)</a>, <a href="../cowboy_req.sock">cowboy_req:sock(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
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+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
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+                </ul>
+              </nav>
+            </div>
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+               <p><img src="/img/footer_logo.png"></p>
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+          </div>
+        </div>
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+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/index.html
new file mode 100644
index 00000000..0dd46067
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/index.html
@@ -0,0 +1,200 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:delete_resp_header(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
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+                </ul>
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+                <li>
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+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:delete_resp_header(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:delete_resp_header - Delete a response header</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">delete_resp_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Name</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()  <i><font color="#9A1900">%% lowercase; case insensitive</font></i></tt></pre>
+</div></div>
+<p>Delete the given response header.</p>
+<p>The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Header name as a lowercase binary string.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A new Req object is returned.</p>
+<p>The returned Req object must be used from that point onward, otherwise the header will still be sent in the response.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Remove the content-type header from the response</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:delete_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>),</tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>, <a href="../cowboy_req.has_resp_header">cowboy_req:has_resp_header(3)</a>, <a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a>, <a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/index.html
new file mode 100644
index 00000000..c569ae43
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/index.html
@@ -0,0 +1,203 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:filter_cookies(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
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+<body class="">
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+    <div id="topbar" class="container">
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+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:filter_cookies(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:filter_cookies - Filter cookie headers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">filter_cookies</font></b>(<font color="#009900">Names</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Names</font> <font color="#990000">::</font> [<b><font color="#000080">atom</font></b>() | <b><font color="#000080">binary</font></b>()]</tt></pre>
+</div></div>
+<p>Filter cookie headers.</p>
+<p>This function is meant to be used before attempting to parse or match cookies in order to remove cookies that are not relevant and are potentially malformed. Because Cowboy by default crashes on malformed cookies, this function allows processing requests that would otherwise result in a 400 error.</p>
+<p>Malformed cookies are unfortunately fairly common due to the string-based interface provided by browsers and this function provides a middle ground between Cowboy&apos;s strict behavior and chaotic real world use cases.</p>
+<p>Note that there may still be crashes even after filtering cookies because this function does not correct malformed values. Cookies that have malformed values should probably be unset in an error response or in a redirect.</p>
+<p>This function can be called even if there are no cookies in the request.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Names</dt>
+<dd><p>The cookies that should be kept.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The Req object is returned with its cookie header value filtered.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.7</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Filter then parse cookies</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:filter_cookies</font></b>([<font color="#FF6600">session_id</font>, <font color="#FF6600">token</font>], <font color="#009900">Req0</font>),
+<font color="#009900">Cookies</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_cookies</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.parse_cookies">cowboy_req:parse_cookies(3)</a>, <a href="../cowboy_req.match_cookies">cowboy_req:match_cookies(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
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+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
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+          </div>
+        </div>
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+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.has_body/index.html
new file mode 100644
index 00000000..1e41c890
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.has_body/index.html
@@ -0,0 +1,193 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:has_body(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+                </ul>
+              </nav> 
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+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:has_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:has_body - Is there a request body?</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">has_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">boolean</font></b>()</tt></pre>
+</div></div>
+<p>Return whether the request has a body.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A boolean indicating whether the request has a body.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Ensure the request has a body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#000080">true</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:has_body</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a>, <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a>, <a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a>, <a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a>, <a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
+                <ul>
+                  <li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
+                </ul>
+              </nav>
+            </div>
+            <div class="span6 credits">
+               <p><img src="/img/footer_logo.png"></p>
+               <p>Copyright &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/index.html
new file mode 100644
index 00000000..e86bdd0d
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/index.html
@@ -0,0 +1,198 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:has_resp_body(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+<h1 class="lined-header"><span>cowboy_req:has_resp_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:has_resp_body - Is there a response body?</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">has_resp_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">boolean</font></b>()</tt></pre>
+</div></div>
+<p>Return whether a response body has been set.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A boolean indicating whether a response body has been set.</p>
+<p>This function will return <code>false</code> when an empty response body has been set.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Check whether a body has been set</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#000080">false</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:has_resp_body</font></b>(<font color="#009900">Req0</font>),
+<font color="#009900">Req1</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello!"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>),
+<font color="#000080">true</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:has_resp_body</font></b>(<font color="#009900">Req1</font>),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_body</font></b>(<font color="#990000">&lt;&lt;&gt;&gt;</font>, <font color="#009900">Req1</font>),
+<font color="#000080">false</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:has_resp_body</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_body">cowboy_req:set_resp_body(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
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+</ul>
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+<h4 id="docs-nav">Navigation</h4>
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+	
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+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
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+	
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+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/index.html
new file mode 100644
index 00000000..5dc3f891
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/index.html
@@ -0,0 +1,201 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+    <title>Nine Nines: cowboy_req:has_resp_header(3)</title>
+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:has_resp_header(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:has_resp_header - Is the given response header set?</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">has_resp_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">boolean</font></b>()
+
+<font color="#009900">Name</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()  <i><font color="#9A1900">%% lowercase; case insensitive</font></i></tt></pre>
+</div></div>
+<p>Return whether the given response header has been set.</p>
+<p>The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Header name as a lowercase binary string.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A boolean indicating whether the given response header has been set.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Check whether the content-type header has been set</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#000080">false</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:has_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>),
+<font color="#000080">true</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:has_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>, <a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a>, <a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a>, <a href="../cowboy_req.delete_resp_header">cowboy_req:delete_resp_header(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.header/index.html
new file mode 100644
index 00000000..6902ad40
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.header/index.html
@@ -0,0 +1,222 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:header(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:header(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:header - HTTP header</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>)          <font color="#990000">-&gt;</font> <b><font color="#000000">header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>, <font color="#000080">undefined</font>)
+<b><font color="#000000">header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>, <font color="#009900">Default</font>) <font color="#990000">-&gt;</font> <b><font color="#000080">binary</font></b>() | <font color="#009900">Default</font>
+
+<font color="#009900">Name</font>    <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()          <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+<font color="#009900">Req</font>     <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Return the value for the given HTTP header.</p>
+<p>The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<p>Headers can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">headers</font> <font color="#990000">:=</font> #{<font color="#009900">Name</font> <font color="#990000">:=</font> <font color="#009900">Value</font>}} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<p>Note that this snippet will crash if the header is missing.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Desired HTTP header name as a lowercase binary string.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Default</dt>
+<dd><p>Default value returned when the header is missing.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The header value is returned as a binary string. When the header is missing, the default argument is returned.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the header value is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the accept header</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Accept</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Get the content-length header with a default value</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Length</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-length"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"0"</font><font color="#990000">&gt;&gt;</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.headers">cowboy_req:headers(3)</a>, <a href="../cowboy_req.parse_header">cowboy_req:parse_header(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.headers/index.html
new file mode 100644
index 00000000..b94d6757
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.headers/index.html
@@ -0,0 +1,202 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:headers(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
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+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
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+
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+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:headers(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:headers - HTTP headers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">headers</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">cowboy:http_headers</font></b>()</tt></pre>
+</div></div>
+<p>Return all request headers.</p>
+<p>Request headers can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">headers</font> <font color="#990000">:=</font> <font color="#009900">Headers</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>Headers are returned as a map with keys being lowercase binary strings, and values as binary strings.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the headers are returned, they are no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get all headers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Headers</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:headers</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.header">cowboy_req:header(3)</a>, <a href="../cowboy_req.parse_header">cowboy_req:parse_header(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
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+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
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+
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+                </ul>
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+               <p><img src="/img/footer_logo.png"></p>
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+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.host/index.html
new file mode 100644
index 00000000..c2abc846
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.host/index.html
@@ -0,0 +1,202 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:host(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
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+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
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+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:host(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:host - URI host name</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">host</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Host</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>Return the host name of the effective request URI.</p>
+<p>The host name can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">host</font> <font color="#990000">:=</font> <font color="#009900">Host</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The host name is returned as a lowercase binary string. It is case insensitive.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the host name is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the effective request URI&apos;s host name</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Host</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:host</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.binding">cowboy_req:binding(3)</a>, <a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a>, <a href="../cowboy_req.host_info">cowboy_req:host_info(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.host_info/index.html
new file mode 100644
index 00000000..d974142b
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.host_info/index.html
@@ -0,0 +1,196 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:host_info(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:host_info - Access the route&apos;s heading host segments</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">host_info</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">cowboy_router:tokens</font></b>()</tt></pre>
+</div></div>
+<p>Return the tokens for the heading host segments.</p>
+<p>This is the part of the host name that was matched using the <code>...</code> notation.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The tokens are returned as a list of case insensitive binary strings.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the tokens are returned, they are no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the host_info tokens</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">HostInfo</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:host_info</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.binding">cowboy_req:binding(3)</a>, <a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a>, <a href="../cowboy_req.path_info">cowboy_req:path_info(3)</a>, <a href="../cowboy_router">cowboy_router(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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+    <script src="/js/custom.js"></script>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.inform/index.html
new file mode 100644
index 00000000..389b16a0
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.inform/index.html
@@ -0,0 +1,220 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:inform(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:inform(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:inform - Send an informational response</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">inform</font></b>(<font color="#009900">Status</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">inform</font></b>(<font color="#009900">StatusCode</font>, #{}, <font color="#009900">Req</font>)
+
+<b><font color="#000000">inform</font></b>(<font color="#009900">Status</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>
+
+<font color="#009900">Status</font>  <font color="#990000">::</font> <b><font color="#000000">cowboy:http_status</font></b>()
+<font color="#009900">Headers</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_headers</font></b>()</tt></pre>
+</div></div>
+<p>Send an informational response.</p>
+<p>Informational responses use a status code between 100 and 199. They cannot include a body. This function will not use any of the previously set headers. All headers to be sent must be given directly.</p>
+<p>Any number of informational responses can be sent as long as they are sent before the proper response. Attempting to use this function after sending a normal response will result in an error.</p>
+<p>The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Status</dt>
+<dd><p>The status code for the response.</p>
+</dd>
+<dt>Headers</dt>
+<dd><p>The response headers.</p>
+<p>Header names must be given as lowercase binary strings.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.1</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Send an informational response</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:inform</font></b>(<font color="#993399">102</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Send an informational response with headers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:inform</font></b>(<font color="#993399">103</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"link"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"&lt;/style.css&gt;; rel=preload; as=style, "</font>
+        <font color="#FF0000">"&lt;/script.js&gt;; rel=preload; as=script"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a>, <a href="../cowboy_req.push">cowboy_req:push(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
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+<input type="hidden" name="item_number" value="99s">
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+              </nav>
+            </div>
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+               <p><img src="/img/footer_logo.png"></p>
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+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/index.html
new file mode 100644
index 00000000..d1496fc2
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/index.html
@@ -0,0 +1,223 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:match_cookies(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+                </ul>
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:match_cookies(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:match_cookies - Match cookies against constraints</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">match_cookies</font></b>(<font color="#009900">Fields</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:fields</font></b>(), <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> #{<b><font color="#000080">atom</font></b>() <font color="#990000">=&gt;</font> <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>Parse the cookies and match specific values against constraints.</p>
+<p>Cowboy will only return the cookie values specified in the fields list, and ignore all others. Fields can be either the name of the cookie requested; the name along with a list of constraints; or the name, a list of constraints and a default value in case the cookie is missing.</p>
+<p>This function will crash if the cookie is missing and no default value is provided. This function will also crash if a constraint fails.</p>
+<p>The name of the cookie must be provided as an atom. The key of the returned map will be that atom. The value may be converted through the use of constraints, making this function able to extract, validate and convert values all in one step.</p>
+<p>This function will crash on invalid cookie data. How to handle this is explained in details in the manual page for <a href="../cowboy_req.parse_cookies">cowboy_req:parse_cookies(3)</a>.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Fields</dt>
+<dd><p>Cookies to retrieve.</p>
+<p>See <a href="../cowboy">cowboy(3)</a> for a complete description.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>Desired values are returned as a map. The key is the atom that was given in the list of fields, and the value is the optionally converted value after applying constraints.</p>
+<p>The map contains the same keys that were given in the fields.</p>
+<p>An exception is triggered when the match fails.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Match fields</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% ID and Lang are binaries.</font></i>
+#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_cookies</font></b>([<font color="#FF6600">id</font>, <font color="#FF6600">lang</font>], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Match fields and apply constraints</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% ID is an integer and Lang a non-empty binary.</font></i>
+#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_cookies</font></b>([{<font color="#FF6600">id</font>, <font color="#FF6600">int</font>}, {<font color="#FF6600">lang</font>, <font color="#FF6600">nonempty</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Match fields with default values</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_cookies</font></b>([{<font color="#FF6600">lang</font>, [], <font color="#990000">&lt;&lt;</font><font color="#FF0000">"en-US"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.filter_cookies">cowboy_req:filter_cookies(3)</a>, <a href="../cowboy_req.parse_cookies">cowboy_req:parse_cookies(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/index.html
new file mode 100644
index 00000000..9b11d4b9
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/index.html
@@ -0,0 +1,222 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+<div class="container">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:match_qs(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:match_qs - Match the query string against constraints</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">match_qs</font></b>(<font color="#009900">Fields</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:fields</font></b>(), <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> #{<b><font color="#000080">atom</font></b>() <font color="#990000">=&gt;</font> <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>Parse the query string and match specific values against constraints.</p>
+<p>Cowboy will only return the query string values specified in the fields list, and ignore all others. Fields can be either the key requested; the key along with a list of constraints; or the key, a list of constraints and a default value in case the key is missing.</p>
+<p>This function will crash if the key is missing and no default value is provided. This function will also crash if a constraint fails.</p>
+<p>The key must be provided as an atom. The key of the returned map will be that atom. The value may be converted through the use of constraints, making this function able to extract, validate and convert values all in one step.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Fields</dt>
+<dd><p>Fields to retrieve from the query string.</p>
+<p>See <a href="../cowboy">cowboy(3)</a> for a complete description.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>Desired values are returned as a map. The key is the atom that was given in the list of fields, and the value is the optionally converted value after applying constraints.</p>
+<p>The map contains the same keys that were given in the fields.</p>
+<p>An exception is triggered when the match fails.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Match fields</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% ID and Lang are binaries.</font></i>
+#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_qs</font></b>([<font color="#FF6600">id</font>, <font color="#FF6600">lang</font>], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Match fields and apply constraints</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% ID is an integer and Lang a non-empty binary.</font></i>
+#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_qs</font></b>([{<font color="#FF6600">id</font>, <font color="#FF6600">int</font>}, {<font color="#FF6600">lang</font>, <font color="#FF6600">nonempty</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Match fields with default values</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:match_qs</font></b>([{<font color="#FF6600">lang</font>, [], <font color="#990000">&lt;&lt;</font><font color="#FF0000">"en-US"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.qs">cowboy_req:qs(3)</a>, <a href="../cowboy_req.parse_qs">cowboy_req:parse_qs(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
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+<ul>
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+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.method/index.html
new file mode 100644
index 00000000..b3656546
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.method/index.html
@@ -0,0 +1,213 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:method(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:method - HTTP method</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">method</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Method</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>Return the request&apos;s HTTP method.</p>
+<p>The method can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">method</font> <font color="#990000">:=</font> <font color="#009900">Method</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The request&apos;s HTTP method is returned as a binary string. While methods are case sensitive, standard methods are always uppercase.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the method is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Ensure the request&apos;s method is GET</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#990000">&lt;&lt;</font><font color="#FF0000">"GET"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:method</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Allow methods from list</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">lists:member</font></b>(<b><font color="#000000">cowboy_req:method</font></b>(<font color="#009900">Req</font>), [<font color="#990000">&lt;&lt;</font><font color="#FF0000">"GET"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"POST"</font><font color="#990000">&gt;&gt;</font>]) <b><font color="#0000FF">of</font></b>
+        <font color="#000080">true</font> <font color="#990000">-&gt;</font> <b><font color="#000000">handle</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>);
+        <font color="#000080">false</font> <font color="#990000">-&gt;</font> <b><font color="#000000">method_not_allowed</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>)
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/index.html
new file mode 100644
index 00000000..578015a5
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/index.html
@@ -0,0 +1,221 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:parse_cookies(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
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+                </ul>
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+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:parse_cookies(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:parse_cookies - Parse cookie headers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_cookies</font></b>(<font color="#009900">Req</font>) <font color="#990000">-&gt;</font> [{<font color="#009900">Name</font>, <font color="#009900">Value</font>}]
+
+<font color="#009900">Name</font>  <font color="#990000">::</font> <b><font color="#000080">binary</font></b>() <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>() <i><font color="#9A1900">%% case sensitive</font></i></tt></pre>
+</div></div>
+<p>Parse cookie headers.</p>
+<p>Alias for <a href="../cowboy_req.parse_header">cowboy_req:parse_header(&lt;&lt;&quot;cookie&quot;&gt;&gt;, Req)</a>.</p>
+<p>When the cookie header is missing or empty, <code>[]</code> is returned.</p>
+<p>This function will crash on invalid cookie data. Because invalid cookies are fairly common when dealing with browsers (because of the string interface that the Javascript API provides), it is recommended to filter the cookie header value before attempting to parse it. This can be accomplished by calling the function <a href="../cowboy_req.filter_cookies">cowboy_req:filter_cookies(3)</a> first. This does not guarantee that parsing succeeds. If it still fails it is recommended to send an error response or redirect with instructions to delete the relevant cookies:</p>
+<div class="listingblock"><div class="title">Recover from cookie parsing errors</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req1</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:filter_cookies</font></b>([<font color="#FF6600">session_id</font>, <font color="#FF6600">token</font>], <font color="#009900">Req0</font>),
+<b><font color="#0000FF">try</font></b> <b><font color="#000000">cowboy_req:parse_cookies</font></b>(<font color="#009900">Req1</font>) <b><font color="#0000FF">of</font></b>
+    <font color="#009900">Cookies</font> <font color="#990000">-&gt;</font>
+        <b><font color="#000000">do_something</font></b>(<font color="#009900">Req1</font>, <font color="#009900">Cookies</font>)
+<b><font color="#0000FF">catch</font></b> <font color="#990000">_:_</font> <font color="#990000">-&gt;</font>
+    <i><font color="#9A1900">%% We can't parse the cookies we need, unset them</font></i>
+    <i><font color="#9A1900">%% otherwise the browser will continue sending them.</font></i>
+    <font color="#009900">Req2</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"session_id"</font><font color="#990000">&gt;&gt;</font>,
+        <font color="#990000">&lt;&lt;&gt;&gt;</font>, <font color="#009900">Req1</font>, #{<font color="#0000FF">max_age</font> <font color="#990000">=&gt;</font> <font color="#993399">0</font>}),
+    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"token"</font><font color="#990000">&gt;&gt;</font>,
+        <font color="#990000">&lt;&lt;&gt;&gt;</font>, <font color="#009900">Req2</font>, #{<font color="#0000FF">max_age</font> <font color="#990000">=&gt;</font> <font color="#993399">0</font>}),
+    <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">500</font>, <font color="#009900">Req</font>)
+<b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The cookies are returned as a list of key/values. Keys and values are case sensitive binary strings.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the parsed header value is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>cookie/2,3</code> and <code>cookies/1</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Look for a specific cookie</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Cookies</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_cookies</font></b>(<font color="#009900">Req</font>),
+{<font color="#990000">_</font>, <font color="#009900">Token</font>} <font color="#990000">=</font> <b><font color="#000000">lists:keyfind</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"token"</font><font color="#990000">&gt;&gt;</font>, <font color="#993399">1</font>, <font color="#009900">Cookies</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.parse_header">cowboy_req:parse_header(3)</a>, <a href="../cowboy_req.filter_cookies">cowboy_req:filter_cookies(3)</a>, <a href="../cowboy_req.match_cookies">cowboy_req:match_cookies(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/index.html
new file mode 100644
index 00000000..9098f678
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/index.html
@@ -0,0 +1,429 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:parse_header(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
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+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:parse_header(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:parse_header - Parse the given HTTP header</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>)          <font color="#990000">-&gt;</font> <font color="#009900">ParsedValue</font> | <font color="#009900">Default</font>
+<b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>, <font color="#009900">Default</font>) <font color="#990000">-&gt;</font> <font color="#009900">ParsedValue</font> | <font color="#009900">Default</font>
+
+<font color="#009900">Name</font>        <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()
+<font color="#009900">Req</font>         <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">ParsedValue</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Default</font>     <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Parse the given HTTP header.</p>
+<p>The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<p>The type of the parsed value varies depending on the header. Similarly, the default value when calling <code>cowboy_req:parse_header/2</code> differs depending on the header.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Desired HTTP header name as a lowercase binary string.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Default</dt>
+<dd><p>Default value returned when the header is missing.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The parsed header value varies depending on the header. When the header is missing, the default argument is returned.</p>
+<h2 id="_headers">Headers</h2>
+<p>The following snippets detail the types returned by the different headers. Unless mentioned otherwise, the default value when the header is missing will be <code>undefined</code>:</p>
+<div class="listingblock"><div class="title">accept</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> [{{<font color="#009900">Type</font>, <font color="#009900">SubType</font>, <font color="#009900">Params</font>}, <font color="#009900">Quality</font>, <font color="#009900">AcceptExt</font>}]
+
+<font color="#009900">Type</font>      <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">SubType</font>   <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">Params</font>    <font color="#990000">::</font> [{<font color="#009900">Key</font>, <font color="#009900">Value</font>}]
+<font color="#009900">Quality</font>   <font color="#990000">::</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">1000</font>
+<font color="#009900">AcceptExt</font> <font color="#990000">::</font> [<font color="#009900">Key</font> | {<font color="#009900">Key</font>, <font color="#009900">Value</font>}]
+<font color="#009900">Key</font>       <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">Value</font>     <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case sensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">accept-charset, accept-encoding and accept-language</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> [{<font color="#009900">Value</font>, <font color="#009900">Quality</font>}]
+
+<font color="#009900">Name</font>    <font color="#990000">::</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept-charset"</font><font color="#990000">&gt;&gt;</font>
+         | <font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept-encoding"</font><font color="#990000">&gt;&gt;</font>
+         | <font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept-language"</font><font color="#990000">&gt;&gt;</font>
+<font color="#009900">Value</font>   <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                 <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">Quality</font> <font color="#990000">::</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">1000</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">access-control-request-headers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"access-control-request-headers"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> [<font color="#009900">Header</font>]
+
+<font color="#009900">Header</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()   <i><font color="#9A1900">%% case insensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">access-control-request-method</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"access-control-request-method"</font><font color="#990000">&gt;&gt;</font>)
+    <font color="#990000">-&gt;</font> <font color="#009900">Method</font>
+
+<font color="#009900">Method</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()   <i><font color="#9A1900">%% case sensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">authorization and proxy-authorization</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"authorization"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">basic</font>, <font color="#009900">Username</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Password</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()}
+     | {<font color="#FF6600">bearer</font>, <font color="#009900">Token</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()}
+     | {<font color="#FF6600">digest</font>, [{<font color="#009900">Key</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()}]}</tt></pre>
+</div></div>
+<!-- @todo Currently also parses connection. Do we want this? Should it be documented? Use case?-->
+<div class="listingblock"><div class="title">content-encoding and content-language</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> [<font color="#009900">Value</font>]
+
+<font color="#009900">Name</font>  <font color="#990000">::</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-encoding"</font><font color="#990000">&gt;&gt;</font>
+       | <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-language"</font><font color="#990000">&gt;&gt;</font>
+<font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                 <i><font color="#9A1900">%% case insensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">content-length</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-length"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> <b><font color="#000000">non_neg_integer</font></b>()</tt></pre>
+</div></div>
+<p>When the content-length header is missing, <code>0</code> is returned.</p>
+<div class="listingblock"><div class="title">content-type</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> {<font color="#009900">Type</font>, <font color="#009900">SubType</font>, <font color="#009900">Params</font>}
+
+<font color="#009900">Type</font>      <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">SubType</font>   <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">Params</font>    <font color="#990000">::</font> [{<font color="#009900">Key</font>, <font color="#009900">Value</font>}]
+<font color="#009900">Key</font>       <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">Value</font>     <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case sensitive;</font></i></tt></pre>
+</div></div>
+<p>Note that the value for the charset parameter is case insensitive and returned as a lowercase binary string.</p>
+<div class="listingblock"><div class="title">cookie</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"cookie"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> [{<font color="#009900">Name</font>, <font color="#009900">Value</font>}]
+
+<font color="#009900">Name</font>  <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                   <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                   <i><font color="#9A1900">%% case sensitive</font></i></tt></pre>
+</div></div>
+<p>When the cookie header is missing, <code>[]</code> is returned.</p>
+<p>While an empty cookie header is not valid, some clients do send it. Cowboy will in this case also return <code>[]</code>.</p>
+<div class="listingblock"><div class="title">expect</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"expect"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> <font color="#FF6600">continue</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">if-match and if-none-match</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> <font color="#FF6600">'*'</font> | [{<font color="#FF6600">weak</font> | <font color="#FF6600">strong</font>, <font color="#009900">OpaqueTag</font>}]
+
+<font color="#009900">Name</font>      <font color="#990000">::</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"if-match"</font><font color="#990000">&gt;&gt;</font>
+           | <font color="#990000">&lt;&lt;</font><font color="#FF0000">"if-none-match"</font><font color="#990000">&gt;&gt;</font>
+<font color="#009900">OpaqueTag</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case sensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">if-modified-since and if-unmodified-since</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> <b><font color="#000000">calendar:datetime</font></b>()</tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">max-forwards</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"max-forwards"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> <b><font color="#000000">non_neg_integer</font></b>()</tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">origin</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"origin"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> [{<font color="#009900">Scheme</font>, <font color="#009900">Host</font>, <font color="#009900">Port</font>} | <font color="#009900">GUID</font>]
+
+<font color="#009900">Scheme</font> <font color="#990000">::</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"http"</font><font color="#990000">&gt;&gt;</font> | <font color="#990000">&lt;&lt;</font><font color="#FF0000">"https"</font><font color="#990000">&gt;&gt;</font>
+<font color="#009900">Host</font>   <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                   <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">Port</font>   <font color="#990000">::</font> <font color="#993399">0</font><font color="#990000">..</font><font color="#993399">65535</font>
+<font color="#009900">GUID</font>   <font color="#990000">::</font> <b><font color="#000080">reference</font></b>()</tt></pre>
+</div></div>
+<p>Cowboy generates a reference in place of a GUID when the URI uses an unsupported uri-scheme or is not an absolute URI.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"range"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> {<font color="#009900">From</font>, <font color="#009900">To</font>} | <font color="#009900">Final</font>
+
+<font color="#009900">From</font>  <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">To</font>    <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>() | <font color="#FF6600">infinity</font>
+<font color="#009900">Final</font> <font color="#990000">::</font> <b><font color="#000000">neg_integer</font></b>()</tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">sec-websocket-extensions</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sec-websocket-extensions"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> [{<font color="#009900">Extension</font>, <font color="#009900">Params</font>}]
+
+<font color="#009900">Extension</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Params</font>    <font color="#990000">::</font> [<font color="#009900">Key</font> | {<font color="#009900">Key</font>, <font color="#009900">Value</font>}]
+<font color="#009900">Key</font>       <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Value</font>     <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()               <i><font color="#9A1900">%% case sensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">sec-websocket-protocol and upgrade</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> [<font color="#009900">Token</font>]
+
+<font color="#009900">Name</font>  <font color="#990000">::</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"sec-websocket-protocol"</font><font color="#990000">&gt;&gt;</font>
+       | <font color="#990000">&lt;&lt;</font><font color="#FF0000">"upgrade"</font><font color="#990000">&gt;&gt;</font>
+<font color="#009900">Token</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                   <i><font color="#9A1900">%% case insensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">trailer</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> [<font color="#009900">Header</font>]
+
+<font color="#009900">Header</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()   <i><font color="#9A1900">%% case insensitive</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">x-forwarded-for</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"x-forwarded-for"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>) <font color="#990000">-&gt;</font> [<font color="#009900">Token</font>]
+
+<font color="#009900">Token</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                   <i><font color="#9A1900">%% case sensitive</font></i></tt></pre>
+</div></div>
+<p>This function will crash when attempting to parse a header Cowboy does not currently understand.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.8</strong>: The function now parses <code>access-control-request-headers</code>, <code>access-control-request-method</code>, <code>content-encoding</code>, <code>content-language</code>, <code>max-forwards</code>, <code>origin</code>, <code>proxy-authorization</code> and <code>trailer</code>.
+</li>
+<li><strong>2.0</strong>: Only the parsed header value is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Parse the accept header with a custom default value</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% Accept everything when header is missing.</font></i>
+<font color="#009900">Accept</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>,
+    [{{ <font color="#990000">&lt;&lt;</font><font color="#FF0000">"*"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"*"</font><font color="#990000">&gt;&gt;</font>, []}, <font color="#993399">1000</font>, []}])<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Parse the content-length header</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% Default content-length is 0.</font></i>
+<font color="#009900">Length</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-length"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.header">cowboy_req:header(3)</a>, <a href="../cowboy_req.headers">cowboy_req:headers(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
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+</ul>
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+<h4 id="docs-nav">Navigation</h4>
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+<ul>
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+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/index.html
new file mode 100644
index 00000000..cd81bbc0
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/index.html
@@ -0,0 +1,210 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+<div id="contents" class="two_col">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:parse_qs(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:parse_qs - Parse the query string</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">parse_qs</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> [{<font color="#009900">Key</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>() | <font color="#000080">true</font>}]</tt></pre>
+</div></div>
+<p>Parse the query string as a list of key/value pairs.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The parsed query string is returned as a list of key/value pairs. The key is a binary string. The value is either a binary string, or the atom <code>true</code>. Both key and value are case sensitive.</p>
+<p>The atom <code>true</code> is returned when a key is present in the query string without a value. For example, in the following URIs the key <code>&lt;&lt;&quot;edit&quot;&gt;&gt;</code> will always have the value <code>true</code>:</p>
+<ul><li><code>/posts/42?edit</code>
+</li>
+<li><code>/posts/42?edit&amp;exclusive=1</code>
+</li>
+<li><code>/posts/42?exclusive=1&amp;edit</code>
+</li>
+<li><code>/posts/42?exclusive=1&amp;edit&amp;from=web</code>
+</li>
+</ul>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: The parsed value is not longer cached in the Req object.
+</li>
+<li><strong>2.0</strong>: Only the parsed query string is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>qs_val/1</code> and <code>qs_vals/1</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Parse the query string and convert the keys to atoms</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">ParsedQs</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:parse_qs</font></b>(<font color="#009900">Req</font>),
+<font color="#009900">AtomsQs</font> <font color="#990000">=</font> [{<b><font color="#000000">binary_to_existing_atom</font></b>(<font color="#009900">K</font>, <font color="#FF6600">latin1</font>), <font color="#009900">V</font>}
+    || {<font color="#009900">K</font>, <font color="#009900">V</font>} <font color="#990000">&lt;-</font> <font color="#009900">ParsedQs</font>]<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.qs">cowboy_req:qs(3)</a>, <a href="../cowboy_req.match_qs">cowboy_req:match_qs(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.path/index.html
new file mode 100644
index 00000000..940fa259
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.path/index.html
@@ -0,0 +1,202 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:path(3)</title>
+
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+<div id="contents" class="two_col">
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+
+<h1 class="lined-header"><span>cowboy_req:path(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:path - URI path</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">path</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Path</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>Return the path of the effective request URI.</p>
+<p>The path can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">path</font> <font color="#990000">:=</font> <font color="#009900">Path</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The path is returned as a binary string. It is case sensitive.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the path is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the effective request URI&apos;s path</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Path</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:path</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.binding">cowboy_req:binding(3)</a>, <a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a>, <a href="../cowboy_req.path_info">cowboy_req:path_info(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.path_info/index.html
new file mode 100644
index 00000000..955acf2f
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.path_info/index.html
@@ -0,0 +1,196 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
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+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+<div class="container">
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+
+<h1 class="lined-header"><span>cowboy_req:path_info(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:path_info - Access the route&apos;s trailing path segments</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">path_info</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">cowboy_router:tokens</font></b>()</tt></pre>
+</div></div>
+<p>Return the tokens for the trailing path segments.</p>
+<p>This is the part of the host name that was matched using the <code>...</code> notation.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The tokens are returned as a list of case sensitive binary strings.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the tokens are returned, they are no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the path_info tokens</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">PathInfo</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:path_info</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.binding">cowboy_req:binding(3)</a>, <a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a>, <a href="../cowboy_req.host_info">cowboy_req:host_info(3)</a>, <a href="../cowboy_router">cowboy_router(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.peer/index.html
new file mode 100644
index 00000000..e4701f5e
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.peer/index.html
@@ -0,0 +1,206 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:peer(3)</title>
+
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+<div id="contents" class="two_col">
+<div class="container">
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+
+<h1 class="lined-header"><span>cowboy_req:peer(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:peer - Peer address and port</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">peer</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Info</font>
+
+<font color="#009900">Info</font> <font color="#990000">::</font> {<b><font color="#000000">inet:ip_address</font></b>(), <b><font color="#000000">inet:port_number</font></b>()}</tt></pre>
+</div></div>
+<p>Return the peer&apos;s IP address and port number.</p>
+<p>The peer information can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">peer</font> <font color="#990000">:=</font> {<font color="#009900">IP</font>, <font color="#009900">Port</font>}} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The peer&apos;s IP address and port number.</p>
+<p>The peer is not necessarily the client&apos;s IP address and port. It is the IP address of the endpoint connecting directly to the server, which may be a gateway or a proxy.</p>
+<p>The forwarded header can be used to get better information about the different endpoints from the client to the server. Note however that it is only informative; there is no reliable way of determining the source of an HTTP request.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the peer is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the peer IP address and port number.</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#009900">IP</font>, <font color="#009900">Port</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:peer</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.sock">cowboy_req:sock(3)</a>, <a href="../cowboy_req.cert">cowboy_req:cert(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<input type="hidden" name="business" value="essen@ninenines.eu">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.port/index.html
new file mode 100644
index 00000000..5d0b74e6
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.port/index.html
@@ -0,0 +1,203 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:port(3)</title>
+
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+
+	</head>
+
+
+<body class="">
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+            
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+</header>
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:port(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:port - URI port number</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">port</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Port</font> <font color="#990000">::</font> <b><font color="#000000">inet:port_number</font></b>()</tt></pre>
+</div></div>
+<p>Return the port number of the effective request URI.</p>
+<p>Note that the port number returned by this function is obtained by parsing the host header. It may be different from the port the peer used to connect to Cowboy.</p>
+<p>The port number can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">port</font> <font color="#990000">:=</font> <font color="#009900">Port</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The port number is returned as an integer.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the port number is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the effective request URI&apos;s port number</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Port</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:port</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.push/index.html
new file mode 100644
index 00000000..76c4d6ad
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.push/index.html
@@ -0,0 +1,229 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:push(3)</title>
+
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+
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+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:push(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:push - Push a resource to the client</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">push</font></b>(<font color="#009900">Path</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">push</font></b>(<font color="#009900">Path</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font>, #{})
+
+<b><font color="#000000">push</font></b>(<font color="#009900">Path</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#009900">Opts</font>)
+    <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>
+
+<font color="#009900">Path</font>    <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()                <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Headers</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_headers</font></b>()
+<font color="#009900">Opts</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:push_opts</font></b>()</tt></pre>
+</div></div>
+<p>Push a resource to the client.</p>
+<p>Cowboy handles push requests the same way as if they came from the client, including the creation of a request handling process, routing and middlewares and so on.</p>
+<p>This function does nothing when the HTTP/1.1 protocol is used. You may call it safely without first checking whether the connection uses HTTP/2.</p>
+<p>The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<p>Note that the headers must be the headers the client is expected to send if it were to perform the request. They are therefore request headers, and not response headers.</p>
+<p>By default, Cowboy will use the GET method, an empty query string, and take the scheme, host and port directly from the current request&apos;s URI. You can override them by passing options.</p>
+<p>Note that clients may cancel the push or ignore it entirely. For example browsers may ignore the resource when the connection is not considered secure.</p>
+<p>It is not possible to push resources after sending a response. Any attempt will result in an error.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Path</dt>
+<dd><p>The status code for the response.</p>
+</dd>
+<dt>Headers</dt>
+<dd><p>The response headers.</p>
+<p>Header names must be given as lowercase binary strings.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>Customize the HTTP method or the URI scheme, host, port or query string.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Push a resource</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:push</font></b>(<font color="#FF0000">"/static/style.css"</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/css"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req</font>),</tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Push a resource with a custom host</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:push</font></b>(<font color="#FF0000">"/static/style.css"</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/css"</font><font color="#990000">&gt;&gt;</font>
+}, #{<font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"cdn.example.org"</font><font color="#990000">&gt;&gt;</font>}, <font color="#009900">Req</font>),</tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.inform">cowboy_req:inform(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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+    <script src="/js/custom.js"></script>
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+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.qs/index.html
new file mode 100644
index 00000000..8f4f6fa6
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.qs/index.html
@@ -0,0 +1,202 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:qs(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
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+            
+            <div id="side-header">
+              <nav>
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+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:qs(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:qs - URI query string</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">qs</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Qs</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>Return the query string of the effective request URI.</p>
+<p>The query string can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">qs</font> <font color="#990000">:=</font> <font color="#009900">Qs</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The query string is returned as a binary string. It is case sensitive.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the query string is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the effective request URI&apos;s query string</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Qs</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:qs</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.parse_qs">cowboy_req:parse_qs(3)</a>, <a href="../cowboy_req.match_qs">cowboy_req:match_qs(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
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+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/index.html
new file mode 100644
index 00000000..18f60a48
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -0,0 +1,253 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+    <title>Nine Nines: cowboy_req:read_and_match_urlencoded_body(3)</title>
+
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+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:read_and_match_urlencoded_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:read_and_match_urlencoded_body - Read, parse and match a urlencoded request body against constraints</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_and_match_urlencoded_body</font></b>(<font color="#009900">Fields</font>, <font color="#009900">Req</font>)
+    <font color="#990000">-&gt;</font> <b><font color="#000000">read_and_match_urlencoded_body</font></b>(<font color="#009900">Fields</font>, <font color="#009900">Req</font>, #{})
+
+<b><font color="#000000">read_and_match_urlencoded_body</font></b>(<font color="#009900">Fields</font>, <font color="#009900">Req</font>, <font color="#009900">Opts</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font>}
+
+<font color="#009900">Fields</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:fields</font></b>()
+<font color="#009900">Req</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">Opts</font>   <font color="#990000">::</font> <b><font color="#000000">cowboy_req:read_body_opts</font></b>()
+<font color="#009900">Body</font>   <font color="#990000">::</font> #{<b><font color="#000080">atom</font></b>() <font color="#990000">=&gt;</font> <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>Read, parse and match a urlencoded request body against constraints.</p>
+<p>This function reads the request body and parses it as <code>application/x-www-form-urlencoded</code>. It then applies the given field constraints to the urlencoded data and returns the result as a map.</p>
+<p>The urlencoded media type is used by Web browsers when submitting HTML forms using the POST method.</p>
+<p>Cowboy will only return the values specified in the fields list, and ignore all others. Fields can be either the key requested; the key along with a list of constraints; or the key, a list of constraints and a default value in case the key is missing.</p>
+<p>This function will crash if the key is missing and no default value is provided. This function will also crash if a constraint fails.</p>
+<p>The key must be provided as an atom. The key of the returned map will be that atom. The value may be converted through the use of constraints, making this function able to extract, validate and convert values all in one step.</p>
+<p>Cowboy needs to read the full body before parsing. By default it will read bodies of size up to 64KB. It is possible to provide options to read larger bodies if required.</p>
+<p>Cowboy will automatically handle protocol details including the expect header, chunked transfer-encoding and others.</p>
+<p>Once the body has been read, Cowboy sets the content-length header if it was not previously provided.</p>
+<p>This function can only be called once. Calling it again will result in undefined behavior.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Fields</dt>
+<dd><p>Fields to retrieve from the urlencoded body.</p>
+<p>See <a href="../cowboy">cowboy(3)</a> for a complete description.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>A map of body reading options. Please refer to <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> for details about each option.</p>
+<p>This function defaults the <code>length</code> to 64KB and the <code>period</code> to 5 seconds.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>An <code>ok</code> tuple is returned.</p>
+<p>Desired values are returned as a map. The key is the atom that was given in the list of fields, and the value is the optionally converted value after applying constraints.</p>
+<p>The map contains the same keys that were given in the fields.</p>
+<p>An exception is triggered when the match fails.</p>
+<p>The Req object returned in the tuple must be used from that point onward. It contains a more up to date representation of the request. For example it may have an added content-length header once the body has been read.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.5</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Match fields</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% ID and Lang are binaries.</font></i>
+#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_and_match_urlencoded_body</font></b>(
+        [<font color="#FF6600">id</font>, <font color="#FF6600">lang</font>], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Match fields and apply constraints</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% ID is an integer and Lang a non-empty binary.</font></i>
+#{<font color="#FF6600">id</font> <font color="#990000">:=</font> <font color="#009900">ID</font>, <font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_and_match_urlencoded_body</font></b>(
+        [{<font color="#FF6600">id</font>, <font color="#FF6600">int</font>}, {<font color="#FF6600">lang</font>, <font color="#FF6600">nonempty</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Match fields with default values</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">lang</font> <font color="#990000">:=</font> <font color="#009900">Lang</font>}
+    <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_and_match_urlencoded_body</font></b>(
+        [{<font color="#FF6600">lang</font>, [], <font color="#990000">&lt;&lt;</font><font color="#FF0000">"en-US"</font><font color="#990000">&gt;&gt;</font>}], <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Allow large urlencoded bodies</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_and_match_urlencoded_body</font></b>(
+    <font color="#009900">Fields</font>, <font color="#009900">Req0</font>, #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">1000000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a>, <a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a>, <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a>, <a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a>, <a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a>, <a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.read_body/index.html
new file mode 100644
index 00000000..161a6aab
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.read_body/index.html
@@ -0,0 +1,230 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:read_body(3)</title>
+
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+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+
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+<div id="contents" class="two_col">
+<div class="container">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:read_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:read_body - Read the request body</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">read_body</font></b>(<font color="#009900">Req</font>, #{})
+
+<b><font color="#000000">read_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#009900">Opts</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>,   <font color="#009900">Data</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Req</font>}
+     | {<font color="#FF6600">more</font>, <font color="#009900">Data</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Req</font>}
+
+<font color="#009900">Opts</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:read_body_opts</font></b>()</tt></pre>
+</div></div>
+<p>Read the request body.</p>
+<p>This function reads a chunk of the request body. A <code>more</code> tuple is returned when more data remains to be read. Call the function repeatedly until an <code>ok</code> tuple is returned to read the entire body.</p>
+<p>An <code>ok</code> tuple with empty data is returned when the request has no body, or when calling this function again after the body has already been read. It is therefore safe to call this function directly. Note that the body can only be read once.</p>
+<p>This function reads the request body from the connection process. The connection process is responsible for reading from the socket. The exact behavior varies depending on the protocol.</p>
+<p>The options therefore are only related to the communication between the request process and the connection process.</p>
+<p>Cowboy will automatically handle protocol details including the expect header, chunked transfer-encoding and others.</p>
+<p>Once the body has been read fully, Cowboy sets the content-length header if it was not previously provided.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>A map of body reading options.</p>
+<p>The <code>length</code> option can be used to request smaller or bigger chunks of data to be sent. It is a best effort approach, Cowboy may send more data than configured on occasions. It defaults to 8MB.</p>
+<p>The <code>period</code> indicates how long the connection process will wait before it provides us with the data it received. It defaults to 15 seconds.</p>
+<p>The connection process sends data to the request process when either the <code>length</code> of data or the <code>period</code> of time is reached.</p>
+<p>The <code>timeout</code> option is a safeguard in case the connection process becomes unresponsive. The function will crash if no message was received in that interval. The timeout should be larger than the period. It defaults to the period + 1 second.</p>
+<p>Auto mode can be enabled by setting the <code>length</code> to <code>auto</code> and the <code>period</code> to <code>infinity</code>. When auto mode is used, Cowboy will send data to the handler as soon as it receives it, regardless of its size. It will wait indefinitely until data is available. Auto mode&apos;s main purpose is asynchronous body reading using <a href="../cowboy_req.cast">cowboy_req:cast(3)</a>.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A <code>more</code> tuple is returned when there are more data to be read.</p>
+<p>An <code>ok</code> tuple is returned when there are no more data to be read, either because this is the last chunk of data, the body has already been read, or there was no body to begin with.</p>
+<p>The data is always returned as a binary.</p>
+<p>The Req object returned in the tuple must be used from that point onward. It contains a more up to date representation of the request. For example it may have an added content-length header once the body has been read.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: The <code>length</code> option now accepts <code>auto</code> and the period now accepts <code>infinity</code>. This adds support for reading the body in auto mode.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>body/1,2</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Read the entire body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_body</font></b>(<font color="#009900">Req0</font>, <font color="#009900">Acc</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_body</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#990000">&lt;&lt;</font> <font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b> <font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>};
+        {<font color="#FF6600">more</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font> <b><font color="#000000">read_body</font></b>(<font color="#009900">Req</font>, <font color="#990000">&lt;&lt;</font> <font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b> <font color="#990000">&gt;&gt;</font>)
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Read the body in small chunks</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">cowboy_req:read_body</font></b>(<font color="#009900">Req</font>, #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">64000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a>, <a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a>, <a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a>, <a href="../cowboy_req.read_and_match_urlencoded_body">cowboy_req:read_and_match_urlencoded_body(3)</a>, <a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a>, <a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.read_part/index.html
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+<h1 class="lined-header"><span>cowboy_req:read_part(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:read_part - Read the next multipart headers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_part</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">read_part</font></b>(<font color="#009900">Req</font>, #{})
+
+<b><font color="#000000">read_part</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#009900">Opts</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font>} | {<font color="#FF6600">done</font>, <font color="#009900">Req</font>}
+
+<font color="#009900">Opts</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:read_body_opts</font></b>()
+<font color="#009900">Headers</font> <font color="#990000">::</font> #{<b><font color="#000080">binary</font></b>() <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>()}</tt></pre>
+</div></div>
+<p>Read the next part of a multipart body.</p>
+<p>This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function parses and returns headers. Examples of multipart media types are <code>multipart/form-data</code> and <code>multipart/byteranges</code>.</p>
+<p>Cowboy will skip any data remaining until the beginning of the next part. This includes the preamble to the multipart message but also the body of a previous part if it hasn&apos;t been read. Both are skipped automatically when calling this function.</p>
+<p>Cowboy will read the body before parsing in chunks of size up to 64KB, with a period of 5 seconds. This is tailored for reading part headers and might not be the most efficient for skipping the previous part&apos;s body.</p>
+<p>The headers returned are MIME headers, <strong>NOT</strong> HTTP headers. They can be parsed using the functions from the <code>cow_multipart</code> module. In addition, the <code>cow_multipart:form_data/1</code> function can be used to quickly extract information from <code>multipart/form-data</code> representations.</p>
+<!-- @todo Proper link to cow_multipart:form_data.-->
+<p>Once a part has been read, it can not be read again.</p>
+<p>Once the body has been read, Cowboy sets the content-length header if it was not previously provided.</p>
+<!-- @todo Limit the maximum size of multipart headers.-->
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>A map of body reading options. Please refer to <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> for details about each option.</p>
+<p>This function defaults the <code>length</code> to 64KB and the <code>period</code> to 5 seconds.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>An <code>ok</code> tuple is returned containing the next part&apos;s headers as a map.</p>
+<p>A <code>done</code> tuple is returned if there are no more parts to read.</p>
+<p>The Req object returned in the tuple must be used from that point onward. It contains a more up to date representation of the request. For example it may have an added content-length header once the body has been read.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced. Replaces <code>part/1,2</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Read all parts</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">acc_multipart</font></b>(<font color="#009900">Req0</font>, <font color="#009900">Acc</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">Headers</font>, <font color="#009900">Req1</font>} <font color="#990000">-&gt;</font>
+            {<font color="#FF6600">ok</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">stream_body</font></b>(<font color="#009900">Req1</font>, <font color="#990000">&lt;&lt;&gt;&gt;</font>),
+            <b><font color="#000000">acc_multipart</font></b>(<font color="#009900">Req</font>, [{<font color="#009900">Headers</font>, <font color="#009900">Body</font>}|<font color="#009900">Acc</font>]);
+        {<font color="#FF6600">done</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            {<b><font color="#000000">lists:reverse</font></b>(<font color="#009900">Acc</font>), <font color="#009900">Req</font>}
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font>
+
+<b><font color="#000000">stream_body</font></b>(<font color="#009900">Req0</font>, <font color="#009900">Acc</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part_body</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">more</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">stream_body</font></b>(<font color="#009900">Req</font>, <font color="#990000">&lt;&lt;</font> <font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b> <font color="#990000">&gt;&gt;</font>);
+        {<font color="#FF6600">ok</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            {<font color="#FF6600">ok</font>, <font color="#990000">&lt;&lt;</font> <font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b> <font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>}
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Read all part headers, skipping bodies</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">skip_body_multipart</font></b>(<font color="#009900">Req0</font>, <font color="#009900">Acc</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">ok</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">skip_body_multipart</font></b>(<font color="#009900">Req</font>, [<font color="#009900">Headers</font>|<font color="#009900">Acc</font>]);
+        {<font color="#FF6600">done</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            {<b><font color="#000000">lists:reverse</font></b>(<font color="#009900">Acc</font>), <font color="#009900">Req</font>}
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Read a part header in larger chunks</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_part</font></b>(<font color="#009900">Req0</font>, #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">1000000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a>, <a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a>, <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a>, <a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a>, <a href="../cowboy_req.read_and_match_urlencoded_body">cowboy_req:read_and_match_urlencoded_body(3)</a>, <a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+	
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+	
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+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/index.html
new file mode 100644
index 00000000..dd74e38e
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/index.html
@@ -0,0 +1,225 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+
+<h1 class="lined-header"><span>cowboy_req:read_part_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:read_part_body - Read the current part&apos;s body</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_part_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">read_part_body</font></b>(<font color="#009900">Req</font>, #{})
+
+<b><font color="#000000">read_part_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#009900">Opts</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>,   <font color="#009900">Data</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Req</font>}
+     | {<font color="#FF6600">more</font>, <font color="#009900">Data</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Req</font>}
+
+<font color="#009900">Opts</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:read_body_opts</font></b>()</tt></pre>
+</div></div>
+<p>Read the body of the current part of the multipart message.</p>
+<p>This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function returns the body of the current part. Examples of multipart media types are <code>multipart/form-data</code> and <code>multipart/byteranges</code>.</p>
+<p>This function reads a chunk of the part&apos;s body. A <code>more</code> tuple is returned when more data remains to be read. Call the function repeatedly until an <code>ok</code> tuple is returned to read the entire body.</p>
+<p>Once a part has been read, it can not be read again.</p>
+<p>Once the body has been read, Cowboy sets the content-length header if it was not previously provided.</p>
+<!-- @todo Limit the maximum size of multipart headers.-->
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>A map of body reading options. Please refer to <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> for details about each option.</p>
+<p>This function uses the same default options as the <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> function.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A <code>more</code> tuple is returned when there are more data to be read.</p>
+<p>An <code>ok</code> tuple is returned when there are no more data to be read.</p>
+<p>The data is always returned as a binary.</p>
+<p>The Req object returned in the tuple must be used from that point onward. It contains a more up to date representation of the request. For example it may have an added content-length header once the body has been read.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced. Replaces <code>part_body/1,2</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Read a full part&apos;s body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">stream_body</font></b>(<font color="#009900">Req0</font>, <font color="#009900">Acc</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">cowboy_req:read_part_body</font></b>(<font color="#009900">Req0</font>) <b><font color="#0000FF">of</font></b>
+        {<font color="#FF6600">more</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            <b><font color="#000000">stream_body</font></b>(<font color="#009900">Req</font>, <font color="#990000">&lt;&lt;</font> <font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b> <font color="#990000">&gt;&gt;</font>);
+        {<font color="#FF6600">ok</font>, <font color="#009900">Data</font>, <font color="#009900">Req</font>} <font color="#990000">-&gt;</font>
+            {<font color="#FF6600">ok</font>, <font color="#990000">&lt;&lt;</font> <font color="#009900">Acc</font><font color="#990000">/</font><b><font color="#000080">binary</font></b>, <font color="#009900">Data</font><font color="#990000">/</font><b><font color="#000080">binary</font></b> <font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>}
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Ensure a part&apos;s body is smaller than 64KB</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_part_body</font></b>(<font color="#009900">Req0</font>, #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">64000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a>, <a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a>, <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a>, <a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a>, <a href="../cowboy_req.read_and_match_urlencoded_body">cowboy_req:read_and_match_urlencoded_body(3)</a>, <a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
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+	
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+	
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+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/index.html
new file mode 100644
index 00000000..02b747c8
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/index.html
@@ -0,0 +1,219 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+
+<h1 class="lined-header"><span>cowboy_req:read_urlencoded_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:read_urlencoded_body - Read and parse a urlencoded request body</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_urlencoded_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">read_urlencoded_body</font></b>(<font color="#009900">Req</font>, #{})
+
+<b><font color="#000000">read_urlencoded_body</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#009900">Opts</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font>}
+
+<font color="#009900">Opts</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:read_body_opts</font></b>()
+<font color="#009900">Body</font> <font color="#990000">::</font> [{<font color="#009900">Key</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>() | <font color="#000080">true</font>}]</tt></pre>
+</div></div>
+<p>Read and parse a urlencoded request body.</p>
+<p>This function reads the request body and parses it as <code>application/x-www-form-urlencoded</code>. It returns a list of key/values.</p>
+<p>The urlencoded media type is used by Web browsers when submitting HTML forms using the POST method.</p>
+<p>Cowboy needs to read the full body before parsing. By default it will read bodies of size up to 64KB. It is possible to provide options to read larger bodies if required.</p>
+<p>Cowboy will automatically handle protocol details including the expect header, chunked transfer-encoding and others.</p>
+<p>Once the body has been read, Cowboy sets the content-length header if it was not previously provided.</p>
+<p>This function can only be called once. Calling it again will result in undefined behavior.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>A map of body reading options. Please refer to <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> for details about each option.</p>
+<p>This function defaults the <code>length</code> to 64KB and the <code>period</code> to 5 seconds.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>An <code>ok</code> tuple is returned containing a list of key/values found in the body.</p>
+<p>The Req object returned in the tuple must be used from that point onward. It contains a more up to date representation of the request. For example it may have an added content-length header once the body has been read.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced. Replaces <code>body_qs/1,2</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Read a urlencoded body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_urlencoded_body</font></b>(<font color="#009900">Req0</font>),
+{<font color="#990000">_</font>, <font color="#009900">Lang</font>} <font color="#990000">=</font> <b><font color="#000000">lists:keyfind</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"lang"</font><font color="#990000">&gt;&gt;</font>, <font color="#993399">1</font>, <font color="#009900">Body</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Allow large urlencoded bodies</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:read_urlencoded_body</font></b>(<font color="#009900">Req0</font>, #{<b><font color="#000080">length</font></b> <font color="#990000">=&gt;</font> <font color="#993399">1000000</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a>, <a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a>, <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a>, <a href="../cowboy_req.read_and_match_urlencoded_body">cowboy_req:read_and_match_urlencoded_body(3)</a>, <a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a>, <a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.reply/index.html
new file mode 100644
index 00000000..c266192b
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.reply/index.html
@@ -0,0 +1,241 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:reply(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
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+            
+            <div id="side-header">
+              <nav>
+                <ul>
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+                </li>
+                    <li>
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+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:reply(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:reply - Send the response</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">reply</font></b>(<font color="#009900">Status</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">reply</font></b>(<font color="#009900">StatusCode</font>, #{}, <font color="#009900">Req</font>)
+
+<b><font color="#000000">reply</font></b>(<font color="#009900">Status</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<b><font color="#000000">reply</font></b>(<font color="#009900">Status</font>, <font color="#009900">Headers</font>, <font color="#009900">Body</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Status</font>  <font color="#990000">::</font> <b><font color="#000000">cowboy:http_status</font></b>()
+<font color="#009900">Headers</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_headers</font></b>()
+<font color="#009900">Body</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:resp_body</font></b>()</tt></pre>
+</div></div>
+<p>Send the response.</p>
+<p>The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<p>Cowboy does not allow duplicate header names. Headers set by this function may overwrite those set by <code>set_resp_header/3</code> and <code>set_resp_headers/2</code>.</p>
+<p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> instead of this function to set cookies.</p>
+<p>The <code>reply/2,3</code> functions will send the body set previously, if any. The <code>reply/4</code> function always sends the given body, overriding any previously set.</p>
+<p>You do not need to set the content-length header when sending a response body. Cowboy takes care of it automatically. You should however provide a content-type header.</p>
+<p>No further data can be transmitted after this function returns. This includes the push mechanism. Attempting to send two replies, or to push resources after a reply has been sent, will result in an error.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Status</dt>
+<dd><p>The status code for the response.</p>
+</dd>
+<dt>Headers</dt>
+<dd><p>The response headers.</p>
+<p>Header names must be given as lowercase binary strings.</p>
+</dd>
+<dt>Body</dt>
+<dd><p>The body can be either a binary value, an iolist or a <code>sendfile</code> tuple telling Cowboy to send the contents of a file.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A new Req object is returned.</p>
+<p>The returned Req object should be used from that point onward as it contains updated information about the state of the request.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the Req is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Reply</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">404</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Reply with custom headers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">401</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"www-authenticate"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Basic realm=\"erlang.org\""</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Reply with custom headers and a body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#FF0000">"Hello world!"</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>, <a href="../cowboy_req.set_resp_body">cowboy_req:set_resp_body(3)</a>, <a href="../cowboy_req.inform">cowboy_req:inform(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a>, <a href="../cowboy_req.push">cowboy_req:push(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
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+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                <ul>
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+                </ul>
+              </nav>
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+               <p><img src="/img/footer_logo.png"></p>
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+          </div>
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+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/index.html
new file mode 100644
index 00000000..ccbf0692
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/index.html
@@ -0,0 +1,213 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:resp_header(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
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+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
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+          </div>
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+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:resp_header(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:resp_header - Response header</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">resp_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>)          <font color="#990000">-&gt;</font> <b><font color="#000000">resp_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>, <font color="#000080">undefined</font>)
+<b><font color="#000000">resp_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Req</font>, <font color="#009900">Default</font>) <font color="#990000">-&gt;</font> <b><font color="#000080">binary</font></b>() | <font color="#009900">Default</font>
+
+<font color="#009900">Name</font>    <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()          <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+<font color="#009900">Req</font>     <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Return the value for the given response header.</p>
+<p>The response header must have been set previously using <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a> or <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>.</p>
+<p>The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Desired response header name as a lowercase binary string.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Default</dt>
+<dd><p>Default value returned when the header is missing.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The header value is returned as a binary string. When the header is missing, the default argument is returned.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the content-type response header</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Type</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Get the content-type response header with a default value</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Type</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html"</font><font color="#990000">&gt;&gt;</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
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+	
+</ul>
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+<h4 id="docs-nav">Navigation</h4>
+
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+<ul>
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+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/index.html
new file mode 100644
index 00000000..555a4fe4
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/index.html
@@ -0,0 +1,193 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+    <title>Nine Nines: cowboy_req:resp_headers(3)</title>
+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:resp_headers(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:resp_headers - Response headers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">resp_headers</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">cowboy:http_headers</font></b>()</tt></pre>
+</div></div>
+<p>Return all response headers.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>Headers are returned as a map with keys being lowercase binary strings, and values as binary strings.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get all response headers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Headers</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:resp_headers</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.scheme/index.html
new file mode 100644
index 00000000..f1e75fa9
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.scheme/index.html
@@ -0,0 +1,207 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:scheme(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
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+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
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+            
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:scheme(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:scheme - URI scheme</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">scheme</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Scheme</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>Return the scheme of the effective request URI.</p>
+<p>The scheme can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">scheme</font> <font color="#990000">:=</font> <font color="#009900">Scheme</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The scheme is returned as a binary. It is case insensitive.</p>
+<p>Cowboy will only set the scheme to <code>&lt;&lt;&quot;http&quot;&gt;&gt;</code> or <code>&lt;&lt;&quot;https&quot;&gt;&gt;</code>.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Redirect HTTP to HTTPS</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req0</font><font color="#990000">=</font>#{<font color="#FF6600">scheme</font> <font color="#990000">:=</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"http"</font><font color="#990000">&gt;&gt;</font>}, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:reply</font></b>(<font color="#993399">302</font>, #{
+        <font color="#990000">&lt;&lt;</font><font color="#FF0000">"location"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">scheme</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"https"</font><font color="#990000">&gt;&gt;</font>})
+    }, <font color="#009900">Req0</font>),
+    {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>};
+<b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">cowboy_rest</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/index.html
new file mode 100644
index 00000000..7eb2d3ae
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/index.html
@@ -0,0 +1,234 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:set_resp_body(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
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+
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+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:set_resp_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:set_resp_body - Set the response body</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">set_resp_body</font></b>(<font color="#009900">Body</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+	<font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Body</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:resp_body</font></b>()</tt></pre>
+</div></div>
+<p>Set the response body.</p>
+<p>The response body will be sent when a reply is initiated. Note that the functions <code>stream_reply/2,3</code> and <code>reply/4</code> will override the body set by this function.</p>
+<p>This function can also be used to remove a response body that was set previously. To do so, simply call this function with an empty body.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Body</dt>
+<dd><p>The body can be either a binary value, an iolist or a <code>sendfile</code> tuple telling Cowboy to send the contents of a file.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A new Req object is returned.</p>
+<p>The returned Req object must be used from that point onward, otherwise the body will not be sent in the response.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: The function now accepts a <code>sendfile</code> tuple.
+</li>
+<li><strong>2.0</strong>: The <code>set_resp_body_fun/2,3</code> functions were removed.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Set the response body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello world!"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Set the response body as an iolist</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_body</font></b>([
+    <font color="#FF0000">"&lt;html&gt;&lt;head&gt;&lt;title&gt;"</font>,
+    <b><font color="#000000">page_title</font></b>(),
+    <font color="#FF0000">"&lt;/title&gt;&lt;/head&gt;&lt;body&gt;"</font>,
+    <b><font color="#000000">page_body</font></b>(),
+    <font color="#FF0000">"&lt;/body&gt;&lt;/html&gt;"</font>
+], <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Tell Cowboy to send data from a file</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#008080">#file_info</font>{<b><font color="#000080">size</font></b><font color="#990000">=</font><font color="#009900">Size</font>}} <font color="#990000">=</font> <b><font color="#000000">file:read_file_info</font></b>(<font color="#009900">Filename</font>),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_body</font></b>({<font color="#FF6600">sendfile</font>, <font color="#993399">0</font>, <font color="#009900">Size</font>, <font color="#009900">Filename</font>}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Clear any previously set response body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_body</font></b>(<font color="#990000">&lt;&lt;&gt;&gt;</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/index.html
new file mode 100644
index 00000000..9a8656cb
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/index.html
@@ -0,0 +1,259 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:set_resp_cookie(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
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+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:set_resp_cookie(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:set_resp_cookie - Set a cookie</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">set_resp_cookie</font></b>(<font color="#009900">Name</font>, <font color="#009900">Value</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">set_resp_cookie</font></b>(<font color="#009900">Name</font>, <font color="#009900">Value</font>, <font color="#009900">Req</font>, #{})
+
+<b><font color="#000000">set_resp_cookie</font></b>(<font color="#009900">Name</font>, <font color="#009900">Value</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#009900">Opts</font>)
+    <font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Name</font>  <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()                  <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()                  <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Opts</font>  <font color="#990000">::</font> <b><font color="#000000">cow_cookie:cookie_opts</font></b>()</tt></pre>
+</div></div>
+<p>Set a cookie to be sent with the response.</p>
+<p>Note that cookie names are case sensitive.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Cookie name.</p>
+</dd>
+<dt>Value</dt>
+<dd><p>Cookie value.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>Cookie options.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A new Req object is returned.</p>
+<p>The returned Req object must be used from that point onward, otherwise the cookie will not be sent in the response.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: <code>set_resp_cookie/3</code> introduced as an alias to <code>set_resp_cookie/4</code> with no options.
+</li>
+<li><strong>2.0</strong>: The first argument type is now <code>binary()</code> instead of <code>iodata()</code>.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Set a session cookie</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">base64:encode</font></b>(<b><font color="#000000">crypto:strong_rand_bytes</font></b>(<font color="#993399">32</font>)),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Set a cookie with an expiration time</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"lang"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"fr-FR"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#009900">Req0</font>, #{<font color="#0000FF">max_age</font> <font color="#990000">=&gt;</font> <font color="#993399">3600</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Delete a cookie</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;&gt;&gt;</font>,
+    <font color="#009900">Req0</font>, #{<font color="#0000FF">max_age</font> <font color="#990000">=&gt;</font> <font color="#993399">0</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Set a cookie for a specific domain and path</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"inaccount"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"1"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#009900">Req0</font>, #{<font color="#0000FF">domain</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"my.example.org"</font>, <font color="#0000FF">path</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"/account"</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Restrict a cookie to HTTPS</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">base64:encode</font></b>(<b><font color="#000000">crypto:strong_rand_bytes</font></b>(<font color="#993399">32</font>)),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>,
+    <font color="#009900">Req0</font>, #{<font color="#0000FF">secure</font> <font color="#990000">=&gt;</font> <font color="#000080">true</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Restrict a cookie to HTTP</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">SessionID</font> <font color="#990000">=</font> <b><font color="#000000">base64:encode</font></b>(<b><font color="#000000">crypto:strong_rand_bytes</font></b>(<font color="#993399">32</font>)),
+<font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_cookie</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"sessionid"</font><font color="#990000">&gt;&gt;</font>, <font color="#009900">SessionID</font>,
+    <font color="#009900">Req0</font>, #{<font color="#0000FF">http_only</font> <font color="#990000">=&gt;</font> <font color="#000080">true</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
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+<input type="hidden" name="currency_code" value="EUR">
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+<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/index.html
new file mode 100644
index 00000000..3e5ac9f4
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/index.html
@@ -0,0 +1,215 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:set_resp_header(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
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+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
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+
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+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
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+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:set_resp_header(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:set_resp_header - Set a response header</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">set_resp_header</font></b>(<font color="#009900">Name</font>, <font color="#009900">Value</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+	<font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Name</font>  <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+<font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()  <i><font color="#9A1900">%% case depends on header</font></i></tt></pre>
+</div></div>
+<p>Set a header to be sent with the response.</p>
+<p>The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<p>Cowboy does not allow duplicate header names. Headers set by this function may be overwritten by those set from the reply functions.</p>
+<p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> instead of this function to set cookies.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Name</dt>
+<dd><p>Header name as a lowercase binary string.</p>
+</dd>
+<dt>Value</dt>
+<dd><p>Header value.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A new Req object is returned.</p>
+<p>The returned Req object must be used from that point onward, otherwise the header will not be sent in the response.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Set a header in the response</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"allow"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF0000">"GET"</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Construct a header using iolists</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_header</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"allow"</font><font color="#990000">&gt;&gt;</font>,
+    [<b><font color="#000000">allowed_methods</font></b>(), <font color="#FF0000">", OPTIONS"</font>], <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>, <a href="../cowboy_req.has_resp_header">cowboy_req:has_resp_header(3)</a>, <a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a>, <a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a>, <a href="../cowboy_req.delete_resp_header">cowboy_req:delete_resp_header(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
+<input type="hidden" name="cmd" value="_donations">
+<input type="hidden" name="business" value="essen@ninenines.eu">
+<input type="hidden" name="lc" value="FR">
+<input type="hidden" name="item_name" value="Loic Hoguin">
+<input type="hidden" name="item_number" value="99s">
+<input type="hidden" name="currency_code" value="EUR">
+<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
+              <nav>
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+                </ul>
+              </nav>
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+               <p><img src="/img/footer_logo.png"></p>
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+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/index.html
new file mode 100644
index 00000000..e3d0e153
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/index.html
@@ -0,0 +1,210 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:set_resp_headers(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
+    <link href="/css/99s.css?r=7" rel="stylesheet">
+
+    <link rel="shortcut icon" href="/img/ico/favicon.ico">
+    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
+    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
+    <link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
+
+	</head>
+
+
+<body class="">
+  <header id="page-head">
+    <div id="topbar" class="container">
+        <div class="row">
+          <div class="span2">
+            <h1 id="logo"><a href="/" title="99s">99s</a></h1>
+          </div>
+          <div class="span10">
+            
+            <div id="side-header">
+              <nav>
+                <ul>
+                  <li><a title="Hear my thoughts" href="/articles">Articles</a></li>
+  				  <li><a title="Watch my talks" href="/talks">Talks</a></li>
+  				  <li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
+  				  <li><a title="Request my services" href="/services">Consulting & Training</a></li>
+                </ul>
+              </nav> 
+              <ul id="social">
+                <li>
+                  <a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
+                </li>
+                    <li>
+						<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
+					</li>
+              </ul>
+            </div>
+          </div>
+        </div>
+    </div>
+
+
+</header>
+
+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:set_resp_headers(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:set_resp_headers - Set several response headers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">set_resp_headers</font></b>(<font color="#009900">Headers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Headers</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_headers</font></b>() | [{<b><font color="#000080">binary</font></b>(), <b><font color="#000000">iodata</font></b>()}]</tt></pre>
+</div></div>
+<p>Set several headers to be sent with the response.</p>
+<p>The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<p>Cowboy does not allow duplicate header names. Headers set by this function may be overwritten by those set from the reply functions. Likewise, headers set by this function may overwrite headers that were set previously.</p>
+<p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> instead of this function to set cookies.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Headers</dt>
+<dd><p>Headers as a map with names being lowercase binary strings, and values as iodata; or as a list with the same requirements for names and values.</p>
+<p>When a list is given it is converted to its equivalent map, with duplicate headers concatenated with a comma inserted in-between. Support for lists is meant to simplify using data from clients or other applications.</p>
+<p>The set-cookie header must not be set using this function.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A new Req object is returned.</p>
+<p>The returned Req object must be used from that point onward, otherwise the headers will not be sent in the response.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.13</strong>: The function now accepts a list of headers.
+</li>
+<li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Set several response headers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:set_resp_headers</font></b>(#{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font>     <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-encoding"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"gzip"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.has_resp_header">cowboy_req:has_resp_header(3)</a>, <a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a>, <a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a>, <a href="../cowboy_req.delete_resp_header">cowboy_req:delete_resp_header(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.sock/index.html
new file mode 100644
index 00000000..c3c067e9
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.sock/index.html
@@ -0,0 +1,202 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="contents" class="two_col">
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+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:sock(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:sock - Socket address and port</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">sock</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Info</font>
+
+<font color="#009900">Info</font> <font color="#990000">::</font> {<b><font color="#000000">inet:ip_address</font></b>(), <b><font color="#000000">inet:port_number</font></b>()}</tt></pre>
+</div></div>
+<p>Return the socket&apos;s IP address and port number.</p>
+<p>The socket information can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">sock</font> <font color="#990000">:=</font> {<font color="#009900">IP</font>, <font color="#009900">Port</font>}} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The socket&apos;s local IP address and port number.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.1</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the socket&apos;s IP address and port number.</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#009900">IP</font>, <font color="#009900">Port</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_req:sock</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.peer">cowboy_req:peer(3)</a>, <a href="../cowboy_req.cert">cowboy_req:cert(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/index.html
new file mode 100644
index 00000000..152fb063
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/index.html
@@ -0,0 +1,213 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+    <title>Nine Nines: cowboy_req:stream_body(3)</title>
+
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+
+<h1 class="lined-header"><span>cowboy_req:stream_body(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:stream_body - Stream the response body</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">stream_body</font></b>(<font color="#009900">Data</font>, <font color="#009900">IsFin</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>
+
+<font color="#009900">Data</font>  <font color="#990000">::</font> <b><font color="#000000">cowboy_req:resp_body</font></b>()
+<font color="#009900">IsFin</font> <font color="#990000">::</font> <font color="#FF6600">fin</font> | <font color="#FF6600">nofin</font></tt></pre>
+</div></div>
+<p>Stream the response body.</p>
+<p>This function may be called as many times as needed after initiating a response using the <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a> function.</p>
+<p>The second argument indicates if this call is the final call. Use the <code>nofin</code> value until you know no more data will be sent. The final call should use <code>fin</code> (possibly with an empty data value) or be a call to the <a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a> function.</p>
+<p>Note that not using <code>fin</code> for the final call is not an error; Cowboy will take care of it when the request handler terminates if needed. Depending on the resource it may however be more efficient to do it as early as possible.</p>
+<p>You do not need to handle HEAD requests specifically as Cowboy will ensure no data is sent when you call this function.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Data</dt>
+<dd><p>The data to be sent.</p>
+</dd>
+<dt>IsFin</dt>
+<dd><p>A flag indicating whether this is the final piece of data to be sent.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.6</strong>: The <code>Data</code> argument can now be a sendfile tuple.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>chunk/2</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Stream the response body</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello\n"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">timer:sleep</font></b>(<font color="#993399">1000</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"World!\n"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">fin</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a>, <a href="../cowboy_req.stream_events">cowboy_req:stream_events(3)</a>, <a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/index.html
new file mode 100644
index 00000000..7694378a
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/index.html
@@ -0,0 +1,227 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
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+<div id="contents" class="two_col">
+<div class="container">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:stream_events(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:stream_events - Stream events</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">stream_events</font></b>(<font color="#009900">Events</font>, <font color="#009900">IsFin</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>
+
+<font color="#009900">Events</font> <font color="#990000">::</font> <font color="#009900">Event</font> | [<font color="#009900">Event</font>]
+<font color="#009900">IsFin</font>  <font color="#990000">::</font> <font color="#FF6600">fin</font> | <font color="#FF6600">nofin</font>
+
+<font color="#009900">Event</font>  <font color="#990000">::</font> #{
+    <font color="#0000FF">comment</font> <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>(),
+    <font color="#0000FF">data</font>    <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>(),
+    <font color="#0000FF">event</font>   <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>() | <b><font color="#000080">atom</font></b>(),
+    <font color="#0000FF">id</font>      <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>(),
+    <font color="#0000FF">retry</font>   <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>()
+}</tt></pre>
+</div></div>
+<p>Stream events.</p>
+<p>This function should only be used for <code>text/event-stream</code> responses when using server-sent events. Cowboy will automatically encode the given events to their text representation.</p>
+<p>This function may be called as many times as needed after initiating a response using the <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a> function.</p>
+<p>The second argument indicates if this call is the final call. Use the <code>nofin</code> value until you know no more data will be sent. The final call should use <code>fin</code> (possibly with an empty data value) or be a call to the <a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a> function.</p>
+<p>Note that not using <code>fin</code> for the final call is not an error; Cowboy will take care of it when the request handler terminates if needed. Depending on the resource it may however be more efficient to do it as early as possible.</p>
+<p>You do not need to handle HEAD requests specifically as Cowboy will ensure no data is sent when you call this function.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Events</dt>
+<dd><p>Events to be sent. All fields are optional.</p>
+</dd>
+<dt>IsFin</dt>
+<dd><p>A flag indicating whether this is the final piece of data to be sent.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.5</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Stream events</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/event-stream"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>),
+<b><font color="#000000">cowboy_req:stream_events</font></b>(#{
+    <font color="#0000FF">id</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"comment-123"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#0000FF">event</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"add_comment"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#0000FF">data</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello,\n\nI noticed something wrong in ..."</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">timer:sleep</font></b>(<font color="#993399">1000</font>),
+<b><font color="#000000">cowboy_req:stream_events</font></b>(#{
+    <font color="#0000FF">event</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"debug"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#0000FF">data</font> <font color="#990000">=&gt;</font> <b><font color="#000000">io_lib:format</font></b>(<font color="#FF0000">"An error occurred: ~p~n"</font>, [<font color="#009900">Error</font>])
+}, <font color="#FF6600">fin</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a>, <a href="../cowboy_req.stream_body">cowboy_req:stream_body(3)</a>, <a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/index.html
new file mode 100644
index 00000000..ae945f63
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/index.html
@@ -0,0 +1,230 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:stream_reply(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:stream_reply(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:stream_reply - Send the response headers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">stream_reply</font></b>(<font color="#009900">Status</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <b><font color="#000000">stream_reply</font></b>(<font color="#009900">StatusCode</font>, #{}, <font color="#009900">Req</font>)
+
+<b><font color="#000000">stream_reply</font></b>(<font color="#009900">Status</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
+    <font color="#990000">-&gt;</font> <font color="#009900">Req</font>
+
+<font color="#009900">Status</font>  <font color="#990000">::</font> <b><font color="#000000">cowboy:http_status</font></b>()
+<font color="#009900">Headers</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_headers</font></b>()</tt></pre>
+</div></div>
+<p>Send the response headers.</p>
+<p>The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
+<p>Cowboy does not allow duplicate header names. Headers set by this function may overwrite those set by <code>set_resp_header/3</code>.</p>
+<p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> instead of this function to set cookies.</p>
+<p>If a response body was set before calling this function, it will not be sent.</p>
+<p>Use <a href="../cowboy_req.stream_body">cowboy_req:stream_body(3)</a> to stream the response body and optionally <a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a> to send response trailer field values.</p>
+<p>You may want to set the content-length header when using this function, if it is known in advance. This will allow clients using HTTP/2 and HTTP/1.0 to process the response more efficiently.</p>
+<p>The streaming method varies depending on the protocol being used. HTTP/2 will use the usual DATA frames. HTTP/1.1 will use chunked transfer-encoding, if the content-length response header is set the body will be sent without chunked chunked transfer-encoding. HTTP/1.0 will send the body unmodified and close the connection at the end if no content-length was set.</p>
+<p>It is not possible to push resources after this function returns. Any attempt will result in an error.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Status</dt>
+<dd><p>The status code for the response.</p>
+</dd>
+<dt>Headers</dt>
+<dd><p>The response headers.</p>
+<p>Header names must be given as lowercase binary strings.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A new Req object is returned.</p>
+<p>The returned Req object must be used from that point onward in order to be able to stream the response body.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the Req is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>chunked_reply/1,2</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Initiate the response</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Stream the response with custom headers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello\n"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">timer:sleep</font></b>(<font color="#993399">1000</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"World!\n"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">fin</font>, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a>, <a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>, <a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a>, <a href="../cowboy_req.inform">cowboy_req:inform(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_body">cowboy_req:stream_body(3)</a>, <a href="../cowboy_req.stream_events">cowboy_req:stream_events(3)</a>, <a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a>, <a href="../cowboy_req.push">cowboy_req:push(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/index.html
new file mode 100644
index 00000000..a2284b64
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/index.html
@@ -0,0 +1,210 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:stream_trailers(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:stream_trailers - Send the response trailers</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">stream_trailers</font></b>(<font color="#009900">Trailers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>
+
+<font color="#009900">Trailers</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_headers</font></b>()</tt></pre>
+</div></div>
+<p>Send the response trailers and terminate the stream.</p>
+<p>This function can only be called once, after initiating a response using <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a> and sending zero or more body chunks using <a href="../cowboy_req.stream_body">cowboy_req:stream_body(3)</a> with the <code>nofin</code> argument set. The function <code>stream_trailers/2</code> implies <code>fin</code> and automatically terminate the response.</p>
+<p>You must list all field names sent in trailers in the trailer header, otherwise they might be dropped by intermediaries or clients.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Trailers</dt>
+<dd><p>Trailer field values to be sent.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.2</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Stream a response body with trailers</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:stream_reply</font></b>(<font color="#993399">200</font>, #{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-type"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/plain"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"trailer"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"expires, content-md5"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req0</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello\n"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>),
+<b><font color="#000000">timer:sleep</font></b>(<font color="#993399">1000</font>),
+<b><font color="#000000">cowboy_req:stream_body</font></b>(<font color="#990000">&lt;&lt;</font><font color="#FF0000">"World!\n"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">nofin</font>, <font color="#009900">Req</font>)<font color="#990000">.</font>
+<b><font color="#000000">cowboy_req:stream_trailers</font></b>(#{
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"expires"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Sun, 10 Dec 2017 19:13:47 GMT"</font><font color="#990000">&gt;&gt;</font>,
+    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"content-md5"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"fbf68a8e34b2ded53bba54e68794b4fe"</font><font color="#990000">&gt;&gt;</font>
+}, <font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a>, <a href="../cowboy_req.stream_body">cowboy_req:stream_body(3)</a>, <a href="../cowboy_req.stream_events">cowboy_req:stream_events(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.uri/index.html
new file mode 100644
index 00000000..ee6a59b7
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.uri/index.html
@@ -0,0 +1,261 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req:uri(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
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+
+<h1 class="lined-header"><span>cowboy_req:uri(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:uri - Reconstructed URI</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">uri</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())       <font color="#990000">-&gt;</font> <b><font color="#000000">uri</font></b>(<font color="#009900">Req</font>, #{})
+<b><font color="#000000">uri</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#009900">Opts</font>) <font color="#990000">-&gt;</font> <font color="#009900">URI</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()
+
+<font color="#009900">Opts</font> <font color="#990000">::</font> #{
+    <font color="#0000FF">scheme</font>   <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>()           | <font color="#000080">undefined</font>,
+    <font color="#0000FF">host</font>     <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>()           | <font color="#000080">undefined</font>,
+    <font color="#0000FF">port</font>     <font color="#990000">=&gt;</font> <b><font color="#000000">inet:port_number</font></b>() | <font color="#000080">undefined</font>,
+    <font color="#0000FF">path</font>     <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>()           | <font color="#000080">undefined</font>,
+    <font color="#0000FF">qs</font>       <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>()           | <font color="#000080">undefined</font>,
+    <font color="#0000FF">fragment</font> <font color="#990000">=&gt;</font> <b><font color="#000000">iodata</font></b>()           | <font color="#000080">undefined</font>
+}</tt></pre>
+</div></div>
+<p>Reconstruct the effective request URI, optionally modifying components.</p>
+<p>By default Cowboy will build a URI using the components found in the request. Options allow disabling or replacing individual components.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>Map for overriding individual components.</p>
+<p>To replace a component, provide its new value as a binary string or an iolist. To disable a component, set its value to <code>undefined</code>.</p>
+<p>As this function always returns a valid URI, there are some things to note:</p>
+<ul><li>Disabling the host also disables the scheme and port.
+</li>
+<li>There is no fragment component by default as these are not sent with the request.
+</li>
+<li>The port number may not appear in the resulting URI if it is the default port for the given scheme (http: 80; https: 443).
+</li>
+</ul>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The reconstructed URI is returned as an iolist or a binary string.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Individual components can be replaced or disabled.
+</li>
+<li><strong>2.0</strong>: Only the URI is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>2.0</strong>: Function introduced. Replaces <code>host_url/1</code> and <code>url/1</code>.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<p>With an effective request URI <a href="http://example.org/path/to/res?edit=1">http://example.org/path/to/res?edit=1</a> we can have:</p>
+<div class="listingblock"><div class="title">Protocol relative form</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% //example.org/path/to/res?edit=1</font></i>
+<b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">scheme</font> <font color="#990000">=&gt;</font> <font color="#000080">undefined</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Serialized origin for use in the origin header</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% </font></i><u><font color="#0000FF">http://example.org</font></u>
+<b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">path</font> <font color="#990000">=&gt;</font> <font color="#000080">undefined</font>, <font color="#0000FF">qs</font> <font color="#990000">=&gt;</font> <font color="#000080">undefined</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">HTTP/1.1 origin form (path and query string only)</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% /path/to/res?edit=1</font></i>
+<b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#000080">undefined</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Add a fragment to the URI</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% </font></i><u><font color="#0000FF">http://example.org/path/to/res</font></u><i><font color="#9A1900">?edit=1#errors</font></i>
+<b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">fragment</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"errors"</font><font color="#990000">&gt;&gt;</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Ensure the scheme is HTTPS</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><i><font color="#9A1900">%% </font></i><u><font color="#0000FF">https://example.org/path/to/res</font></u><i><font color="#9A1900">?edit=1</font></i>
+<b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>, #{<font color="#0000FF">scheme</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"https"</font><font color="#990000">&gt;&gt;</font>})<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Convert the URI to a binary string</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">iolist_to_binary</font></b>(<b><font color="#000000">cowboy_req:uri</font></b>(<font color="#009900">Req</font>))<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.scheme">cowboy_req:scheme(3)</a>, <a href="../cowboy_req.host">cowboy_req:host(3)</a>, <a href="../cowboy_req.port">cowboy_req:port(3)</a>, <a href="../cowboy_req.path">cowboy_req:path(3)</a>, <a href="../cowboy_req.qs">cowboy_req:qs(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.13/manual/cowboy_req.version/index.html
new file mode 100644
index 00000000..31a0e6d9
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req.version/index.html
@@ -0,0 +1,202 @@
+<!DOCTYPE html>
+<html lang="en">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req:version(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req:version - HTTP version</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">version</font></b>(<font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Version</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_version</font></b>()</tt></pre>
+</div></div>
+<p>Return the HTTP version used for the request.</p>
+<p>The version can also be obtained using pattern matching:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>#{<font color="#FF6600">version</font> <font color="#990000">:=</font> <font color="#009900">Version</font>} <font color="#990000">=</font> <font color="#009900">Req</font><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The HTTP version used for the request is returned as an atom. It is provided for informative purposes only.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Only the version is returned, it is no longer wrapped in a tuple.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Get the HTTP version</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Version</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:version</font></b>(<font color="#009900">Req</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_req">cowboy_req(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_req/index.html b/docs/en/cowboy/2.13/manual/cowboy_req/index.html
new file mode 100644
index 00000000..7f4d17b4
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_req/index.html
@@ -0,0 +1,384 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_req(3)</title>
+
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_req(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_req - HTTP request and response</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_req</code> provides functions to access, manipulate and respond to requests.</p>
+<p>There are four types of functions in this module. They can be differentiated by their name and their return type:</p>
+<table rules="all" width="100%" frame="border"
+			cellspacing="0" cellpadding="4">
+<thead><tr><th>Type</th>
+<th>Name pattern</th>
+<th>Return type</th>
+</tr></thead><tbody><tr><td>access</td>
+<td>no verb, parse_*, match_*</td>
+<td><code>Value</code></td>
+</tr>
+<tr><td>question</td>
+<td>has_*</td>
+<td><code>boolean()</code></td>
+</tr>
+<tr><td>modification</td>
+<td>set_*</td>
+<td><code>Req</code></td>
+</tr>
+<tr><td>action</td>
+<td>any other verb</td>
+<td><code>ok | {Result, Value, Req}</code></td>
+</tr>
+</tbody></table>
+<p>Any <code>Req</code> returned must be used in place of the one passed as argument. Functions that perform an action in particular write state in the Req object to make sure you are using the function correctly. For example, it&apos;s only possible to send one response, and to read the body once.</p>
+<h2 id="_exports">Exports</h2>
+<p>Connection:</p>
+<ul><li><a href="../cowboy_req.peer">cowboy_req:peer(3)</a> - Peer address and port
+</li>
+<li><a href="../cowboy_req.sock">cowboy_req:sock(3)</a> - Socket address and port
+</li>
+<li><a href="../cowboy_req.cert">cowboy_req:cert(3)</a> - Client TLS certificate
+</li>
+</ul>
+<p>Raw request:</p>
+<ul><li><a href="../cowboy_req.method">cowboy_req:method(3)</a> - HTTP method
+</li>
+<li><a href="../cowboy_req.version">cowboy_req:version(3)</a> - HTTP version
+</li>
+<li><a href="../cowboy_req.scheme">cowboy_req:scheme(3)</a> - URI scheme
+</li>
+<li><a href="../cowboy_req.host">cowboy_req:host(3)</a> - URI host name
+</li>
+<li><a href="../cowboy_req.port">cowboy_req:port(3)</a> - URI port number
+</li>
+<li><a href="../cowboy_req.path">cowboy_req:path(3)</a> - URI path
+</li>
+<li><a href="../cowboy_req.qs">cowboy_req:qs(3)</a> - URI query string
+</li>
+<li><a href="../cowboy_req.uri">cowboy_req:uri(3)</a> - Reconstructed URI
+</li>
+<li><a href="../cowboy_req.header">cowboy_req:header(3)</a> - HTTP header
+</li>
+<li><a href="../cowboy_req.headers">cowboy_req:headers(3)</a> - HTTP headers
+</li>
+</ul>
+<p>Processed request:</p>
+<ul><li><a href="../cowboy_req.parse_qs">cowboy_req:parse_qs(3)</a> - Parse the query string
+</li>
+<li><a href="../cowboy_req.match_qs">cowboy_req:match_qs(3)</a> - Match the query string against constraints
+</li>
+<li><a href="../cowboy_req.parse_header">cowboy_req:parse_header(3)</a> - Parse the given HTTP header
+</li>
+<li><a href="../cowboy_req.filter_cookies">cowboy_req:filter_cookies(3)</a> - Filter cookie headers
+</li>
+<li><a href="../cowboy_req.parse_cookies">cowboy_req:parse_cookies(3)</a> - Parse cookie headers
+</li>
+<li><a href="../cowboy_req.match_cookies">cowboy_req:match_cookies(3)</a> - Match cookies against constraints
+</li>
+<li><a href="../cowboy_req.binding">cowboy_req:binding(3)</a> - Access a value bound from the route
+</li>
+<li><a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a> - Access all values bound from the route
+</li>
+<li><a href="../cowboy_req.host_info">cowboy_req:host_info(3)</a> - Access the route&apos;s heading host segments
+</li>
+<li><a href="../cowboy_req.path_info">cowboy_req:path_info(3)</a> - Access the route&apos;s trailing path segments
+</li>
+</ul>
+<p>Request body:</p>
+<ul><li><a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a> - Is there a request body?
+</li>
+<li><a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a> - Body length
+</li>
+<li><a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> - Read the request body
+</li>
+<li><a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a> - Read and parse a urlencoded request body
+</li>
+<li><a href="../cowboy_req.read_and_match_urlencoded_body">cowboy_req:read_and_match_urlencoded_body(3)</a> - Read, parse and match a urlencoded request body against constraints
+</li>
+<li><a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a> - Read the next multipart headers
+</li>
+<li><a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a> - Read the current part&apos;s body
+</li>
+</ul>
+<p>Response:</p>
+<ul><li><a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> - Set a cookie
+</li>
+<li><a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a> - Set a response header
+</li>
+<li><a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a> - Set several response headers
+</li>
+<li><a href="../cowboy_req.has_resp_header">cowboy_req:has_resp_header(3)</a> - Is the given response header set?
+</li>
+<li><a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a> - Response header
+</li>
+<li><a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a> - Response headers
+</li>
+<li><a href="../cowboy_req.delete_resp_header">cowboy_req:delete_resp_header(3)</a> - Delete a response header
+</li>
+<li><a href="../cowboy_req.set_resp_body">cowboy_req:set_resp_body(3)</a> - Set the response body
+</li>
+<li><a href="../cowboy_req.has_resp_body">cowboy_req:has_resp_body(3)</a> - Is there a response body?
+</li>
+<li><a href="../cowboy_req.inform">cowboy_req:inform(3)</a> - Send an informational response
+</li>
+<li><a href="../cowboy_req.reply">cowboy_req:reply(3)</a> - Send the response
+</li>
+<li><a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a> - Send the response headers
+</li>
+<li><a href="../cowboy_req.stream_body">cowboy_req:stream_body(3)</a> - Stream the response body
+</li>
+<li><a href="../cowboy_req.stream_events">cowboy_req:stream_events(3)</a> - Stream events
+</li>
+<li><a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a> - Send the response trailers
+</li>
+<li><a href="../cowboy_req.push">cowboy_req:push(3)</a> - Push a resource to the client
+</li>
+</ul>
+<p>Stream handlers:</p>
+<ul><li><a href="../cowboy_req.cast">cowboy_req:cast(3)</a> - Cast a stream handler event
+</li>
+</ul>
+<h2 id="_types">Types</h2>
+<h3 id="_push_opts">push_opts()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">push_opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">method</font> <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),            <i><font color="#9A1900">%% case sensitive</font></i>
+    <font color="#0000FF">scheme</font> <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),            <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+    <font color="#0000FF">host</font>   <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),            <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+    <font color="#0000FF">port</font>   <font color="#990000">=&gt;</font> <b><font color="#000000">inet:port_number</font></b>(),
+    <font color="#0000FF">qs</font>     <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>()             <i><font color="#9A1900">%% case sensitive</font></i>
+}</tt></pre>
+</div></div>
+<p>Push options.</p>
+<p>By default, Cowboy will use the GET method, an empty query string, and take the scheme, host and port directly from the current request&apos;s URI.</p>
+<h3 id="_read_body_opts">read_body_opts()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">read_body_opts</font></b>() <font color="#990000">::</font> #{
+    <b><font color="#000080">length</font></b>  <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>() | <font color="#FF6600">auto</font>,
+    <font color="#0000FF">period</font>  <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>() | <font color="#FF6600">infinity</font>,
+    <font color="#0000FF">timeout</font> <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>()
+}</tt></pre>
+</div></div>
+<p>Body reading options.</p>
+<p>The defaults are function-specific.</p>
+<p>Auto mode can be enabled by setting <code>length</code> to <code>auto</code> and <code>period</code> to <code>infinity</code>. The period cannot be set to <code>infinity</code> when auto mode isn&apos;t used.</p>
+<h3 id="_req">req()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">req</font></b>() <font color="#990000">::</font> #{
+    <font color="#FF6600">method</font>  <font color="#990000">:=</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% case sensitive</font></i>
+    <font color="#FF6600">version</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy:http_version</font></b>() | <b><font color="#000080">atom</font></b>(),
+    <font color="#FF6600">scheme</font>  <font color="#990000">:=</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+    <font color="#FF6600">host</font>    <font color="#990000">:=</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+    <font color="#FF6600">port</font>    <font color="#990000">:=</font> <b><font color="#000000">inet:port_number</font></b>(),
+    <font color="#FF6600">path</font>    <font color="#990000">:=</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% case sensitive</font></i>
+    <font color="#FF6600">qs</font>      <font color="#990000">:=</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% case sensitive</font></i>
+    <font color="#FF6600">headers</font> <font color="#990000">:=</font> <b><font color="#000000">cowboy:http_headers</font></b>(),
+    <font color="#FF6600">peer</font>    <font color="#990000">:=</font> {<b><font color="#000000">inet:ip_address</font></b>(), <b><font color="#000000">inet:port_number</font></b>()},
+    <font color="#FF6600">sock</font>    <font color="#990000">:=</font> {<b><font color="#000000">inet:ip_address</font></b>(), <b><font color="#000000">inet:port_number</font></b>()},
+    <font color="#FF6600">cert</font>    <font color="#990000">:=</font> <b><font color="#000080">binary</font></b>() | <font color="#000080">undefined</font>
+}</tt></pre>
+</div></div>
+<p>The Req object.</p>
+<p>Contains information about the request and response. While some fields are publicly documented, others aren&apos;t and shouldn&apos;t be used.</p>
+<p>You may add custom fields if required. Make sure to namespace them by prepending an underscore and the name of your application:</p>
+<div class="listingblock"><div class="title">Setting a custom field</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Req</font>#{<font color="#FF6600">'_myapp_auth_method'</font> <font color="#990000">=&gt;</font> <font color="#FF6600">pubkey</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h3 id="_resp_body">resp_body()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">resp_body</font></b>() <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()
+    | {<font color="#FF6600">sendfile</font>, <font color="#009900">Offset</font>, <font color="#009900">Length</font>, <font color="#009900">Filename</font>}
+
+<font color="#009900">Offset</font>   <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">Length</font>   <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">Filename</font> <font color="#990000">::</font> <b><font color="#000000">file:name_all</font></b>()</tt></pre>
+</div></div>
+<p>Response body.</p>
+<p>It can take two forms: the actual data to be sent or a tuple indicating which file to send.</p>
+<p>When sending data directly, the type is either a binary or an iolist. Iolists are an efficient way to build output. Instead of concatenating strings or binaries, you can simply build a list containing the fragments you want to send in the order they should be sent:</p>
+<div class="listingblock"><div class="title">Example iolists usage</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#993399">1</font><font color="#990000">&gt;</font> <font color="#009900">RespBody</font> <font color="#990000">=</font> [<font color="#FF0000">"Hello "</font>, [<font color="#990000">&lt;&lt;</font><font color="#FF0000">"world"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF0000">$!</font>]]<font color="#990000">.</font>
+[<font color="#FF0000">"Hello "</font>,[<font color="#990000">&lt;&lt;</font><font color="#FF0000">"world"</font><font color="#990000">&gt;&gt;</font>,<font color="#993399">33</font>]]
+<font color="#993399">2</font><font color="#990000">&gt;</font> <b><font color="#000000">io:format</font></b>(<font color="#FF0000">"~s~n"</font>, [<font color="#009900">RespBody</font>])<font color="#990000">.</font>
+<font color="#009900">Hello</font> <font color="#FF6600">world</font><font color="#990000">!</font></tt></pre>
+</div></div>
+<p>Note that the length must be greater than zero for any data to be sent. Cowboy will send an empty body when the length is zero.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_rest/index.html b/docs/en/cowboy/2.13/manual/cowboy_rest/index.html
new file mode 100644
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+++ b/docs/en/cowboy/2.13/manual/cowboy_rest/index.html
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+
+<h1 class="lined-header"><span>cowboy_rest(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_rest - REST handlers</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_rest</code> implements the HTTP state machine.</p>
+<p>Implementing REST handlers is not enough to provide a REST interface; this interface must also follow the REST constraints including HATEOAS (hypermedia as the engine of application state).</p>
+<h2 id="_callbacks">Callbacks</h2>
+<p>REST handlers implement the following interface:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">cowboy_rest</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Callback</font>(<font color="#009900">Req</font>, <font color="#009900">State</font>)
+    <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+     | {<font color="#FF6600">stop</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+     | {{<font color="#FF6600">switch_handler</font>, <font color="#009900">Module</font>}, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+     | {{<font color="#FF6600">switch_handler</font>, <font color="#009900">Module</font>, <font color="#009900">Opts</font>}, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<b><font color="#000000">terminate</font></b>(<font color="#009900">Reason</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>  <i><font color="#9A1900">%% optional</font></i>
+
+<font color="#009900">Req</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">State</font>  <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Module</font> <font color="#990000">::</font> <b><font color="#000000">module</font></b>()
+<font color="#009900">Opts</font>   <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Reason</font> <font color="#990000">::</font> <b><font color="#000080">normal</font></b>
+        | {<font color="#FF6600">crash</font>, <font color="#FF6600">error</font> | <b><font color="#000080">exit</font></b> | <b><font color="#000080">throw</font></b>, <b><font color="#000000">any</font></b>()}
+
+<font color="#009900">Callback</font> <font color="#990000">-</font> <font color="#FF6600">see</font> <font color="#FF6600">below</font>
+<font color="#009900">Result</font>   <font color="#990000">-</font> <font color="#FF6600">see</font> <font color="#FF6600">below</font>
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">see</font> <font color="#FF6600">below</font></tt></pre>
+</div></div>
+<p>The <code>init/2</code> callback is common to all handlers. To switch to the REST handler behavior, it must return <code>cowboy_rest</code> as the first element of the tuple.</p>
+<p>The <code>Callback/2</code> above represents all the REST-specific callbacks. They are described in the following section of this manual. REST-specific callbacks differ by their name, semantics, result and default values. The default value is the one used when the callback has not been implemented. They otherwise all follow the same interface.</p>
+<p>The <code>stop</code> tuple can be returned to stop REST processing. If no response was sent before then, Cowboy will send a <em>204 No Content</em>. The <code>stop</code> tuple can be returned from any callback, excluding <code>expires</code>, <code>generate_etag</code>, <code>last_modified</code> and <code>variances</code>.</p>
+<p>A <code>switch_handler</code> tuple can be returned from these same callbacks to stop REST processing and switch to a different handler type. This is very useful to, for example, to stream the response body.</p>
+<p>The optional <code>terminate/3</code> callback will ultimately be called with the reason for the termination of the handler. Cowboy will terminate the process right after this. There is no need to perform any cleanup in this callback.</p>
+<p>The following terminate reasons are defined for loop handlers:</p>
+<dl><dt>normal</dt>
+<dd><p>The handler terminated normally.</p>
+</dd>
+<dt>{crash, Class, Reason}</dt>
+<dd><p>A crash occurred in the handler. <code>Class</code> and <code>Reason</code> can be used to obtain more information about the crash.</p>
+</dd>
+</dl>
+<h2 id="_rest_callbacks">REST callbacks</h2>
+<h3 id="_acceptcallback">AcceptCallback</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">AcceptCallback</font>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <font color="#000080">true</font>
+         | {<font color="#FF6600">created</font>, <font color="#009900">URI</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()}
+         | {<font color="#FF6600">see_other</font>, <font color="#009900">URI</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()}
+         | <font color="#000080">false</font>
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">crash</font></tt></pre>
+</div></div>
+<p>Process the request body.</p>
+<p>This function should create or update the resource using the request body.</p>
+<p>For PUT requests, the body is a representation of the resource that is being created or replaced.</p>
+<p>For POST requests, the body is typically application-specific instructions on how to process the request, but it may also be a representation of the resource. When creating a new resource with POST at a different location, return <code>{created, URI}</code> or <code>{see_other, URI}</code> with <code>URI</code> the new location.</p>
+<p>The <code>see_other</code> tuple will redirect the client to the new location automatically.</p>
+<p>For PATCH requests, the body is a series of instructions on how to update the resource. Patch files or JSON Patch are examples of such media types.</p>
+<p>A response body may be sent. The appropriate media type, charset and language for the response can be retrieved from the Req object using the <code>media_type</code>, <code>charset</code> and <code>language</code> keys, respectively. The body can be set using <a href="../cowboy_req.set_resp_body">cowboy_req:set_resp_body(3)</a>.</p>
+<h3 id="_allowed_methods">allowed_methods</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">allowed_methods</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> [<b><font color="#000080">binary</font></b>()]  <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Default</font> <font color="#990000">::</font> [<font color="#990000">&lt;&lt;</font><font color="#FF0000">"GET"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"HEAD"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"OPTIONS"</font><font color="#990000">&gt;&gt;</font>]</tt></pre>
+</div></div>
+<p>Return the list of allowed methods.</p>
+<h3 id="_allow_missing_post">allow_missing_post</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">allow_missing_post</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Return whether POST is allowed when the resource doesn&apos;t exist.</p>
+<p>Returning <code>true</code> here means that a new resource will be created. The URI for the newly created resource should be returned from the <code>AcceptCallback</code> function.</p>
+<h3 id="_charsets_provided">charsets_provided</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">charsets_provided</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> [<b><font color="#000080">binary</font></b>()]  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">skip</font> <font color="#FF6600">this</font> <font color="#FF6600">step</font></tt></pre>
+</div></div>
+<p>Return the list of charsets the resource provides in order of preference.</p>
+<p>During content negotiation Cowboy will pick the most appropriate charset for the client. The client advertises charsets it prefers with the accept-charset header. When that header is missing, Cowboy picks the first charset from the resource.</p>
+<!-- @todo We should explain precisely how charsets are picked.-->
+<p>Cowboy will add the negotiated <code>charset</code> to the Req object after this step completes:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">req</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">charset</font> <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>()  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+}</tt></pre>
+</div></div>
+<p>Note that Cowboy will only append the charset to the content-type header of the response if the media type is text.</p>
+<h3 id="_content_types_accepted">content_types_accepted</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">content_types_accepted</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>     <font color="#990000">::</font> [{<font color="#FF6600">'*'</font> | <b><font color="#000080">binary</font></b>() | <font color="#009900">ParsedMime</font>, <font color="#009900">AcceptCallback</font> <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()}]
+<font color="#009900">ParsedMime</font> <font color="#990000">::</font> {<font color="#009900">Type</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">SubType</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#FF6600">'*'</font> | <font color="#009900">Params</font>}
+<font color="#009900">Params</font>     <font color="#990000">::</font> [{<font color="#009900">Key</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()}]
+
+<font color="#009900">Default</font>     <font color="#990000">-</font> <font color="#FF6600">crash</font></tt></pre>
+</div></div>
+<!-- @todo Case sensitivity of parsed mime content?-->
+<p>Return the list of media types the resource accepts in order of preference.</p>
+<p>A media type is made of different parts. The media type <code>text/html;charset=utf-8</code> is of type <code>text</code>, subtype <code>html</code> and has a single parameter <code>charset</code> with value <code>utf-8</code>.</p>
+<p>The special value <code>&apos;*&apos;</code> can be used to accept any media type.</p>
+<!-- @todo Cowboy needs to ignore the boundary parameter for-->
+<!-- multipart, as we never want to match against it. Or allow-->
+<!-- ignoring specific parameters at the very least.-->
+<p>Cowboy will match the content-type request header against the media types the server accepts and select the appropriate callback. When that header is missing, or when the server does not accept this media type, the request fails and an error response is returned. Cowboy will execute the callback immediately otherwise.</p>
+<!-- @todo We should explain precisely how media types are picked.-->
+<p>An empty parameters list <code>[]</code> means that no parameters will be accepted. When any parameter is acceptable, the tuple form should be used with parameters as the atom <code>&apos;*&apos;</code>.</p>
+<p>Cowboy treats all parameters as case sensitive, except for the <code>charset</code> parameter, which is known to be case insensitive. You should therefore always provide the charset as a lowercase binary string.</p>
+<!-- @todo Maybe this should be in the user guide instead.-->
+<!-- This function will be called for POST, PUT and PATCH requests.-->
+<!-- It is entirely possible to define different callbacks for different-->
+<!-- methods if the handling of the request differs. Simply verify-->
+<!-- what the method is with `cowboy_req:method/1` and return a-->
+<!-- different list for each methods.-->
+<h3 id="_content_types_provided">content_types_provided</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">content_types_provided</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>     <font color="#990000">::</font> [{<b><font color="#000080">binary</font></b>() | <font color="#009900">ParsedMime</font>, <font color="#009900">ProvideCallback</font> <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()}]
+<font color="#009900">ParsedMime</font> <font color="#990000">::</font> {<font color="#009900">Type</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">SubType</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#FF6600">'*'</font> | <font color="#009900">Params</font>}
+<font color="#009900">Params</font>     <font color="#990000">::</font> [{<font color="#009900">Key</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()}]
+
+<font color="#009900">Default</font>     <font color="#990000">-</font> [{{ <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"html"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">'*'</font>}, <font color="#FF6600">to_html</font>}]</tt></pre>
+</div></div>
+<!-- @todo Case sensitivity of parsed mime content?-->
+<!-- @todo Space required for the time being: https://github.com/spf13/hugo/issues/2398-->
+<p>Return the list of media types the resource provides in order of preference.</p>
+<p>A media type is made of different parts. The media type <code>text/html;charset=utf-8</code> is of type <code>text</code>, subtype <code>html</code> and has a single parameter <code>charset</code> with value <code>utf-8</code>.</p>
+<!-- @todo Cowboy needs to ignore the boundary parameter for-->
+<!-- multipart, as we never want to match against it. Or allow-->
+<!-- ignoring specific parameters at the very least.-->
+<p>During content negotiation Cowboy will pick the most appropriate media type for the client. The client advertises media types it prefers with the accept header. When that header is missing, the content negotiation fails and an error response is returned.</p>
+<p>The callback given for the selected media type will be called at the end of the execution of GET and HEAD requests when a representation must be sent to the client.</p>
+<!-- @todo We should explain precisely how media types are picked.-->
+<p>An empty parameters list <code>[]</code> means that no parameters will be accepted. When any parameter is acceptable, the tuple form should be used with parameters as the atom <code>&apos;*&apos;</code>.</p>
+<p>Cowboy treats all parameters as case sensitive, except for the <code>charset</code> parameter, which is known to be case insensitive. You should therefore always provide the charset as a lowercase binary string.</p>
+<p>When a charset is given in the media type parameters in the accept header, Cowboy will do some additional checks to confirm that it can use this charset. When the wildcard is used then Cowboy will immediately call <code>charsets_provided</code> to confirm the charset is acceptable. If the callback is undefined Cowboy assumes any charset is acceptable. When the wildcard is not used and the charset given in the accept header matches one of the configured media types Cowboy will use that charset and skip the <code>charsets_provided</code> step entirely.</p>
+<p>Cowboy will add the negotiated <code>media_type</code> to the Req object after this step completes:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">req</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">media_type</font> <font color="#990000">=&gt;</font> <font color="#009900">ParsedMime</font>
+}</tt></pre>
+</div></div>
+<!-- @todo Case sensitivity of parsed mime content?-->
+<p>Cowboy may also add the negotiated <code>charset</code> to the Req object after this step completes:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">req</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">charset</font> <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>()  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+}</tt></pre>
+</div></div>
+<h3 id="_delete_completed">delete_completed</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">delete_completed</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Return whether the resource has been fully deleted from the system, including from any internal cache.</p>
+<p>Returning <code>false</code> will result in a <em>202 Accepted</em> response being sent instead of a <em>200 OK</em> or <em>204 No Content</em>.</p>
+<h3 id="_delete_resource">delete_resource</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">delete_resource</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Delete the resource.</p>
+<p>Cowboy will send an error response when this function returns <code>false</code>.</p>
+<h3 id="_expires">expires</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">expires</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">calendar:datetime</font></b>() | <b><font color="#000080">binary</font></b>() | <font color="#000080">undefined</font>
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">undefined</font></tt></pre>
+</div></div>
+<p>Return the resource&apos;s expiration date.</p>
+<h3 id="_forbidden">forbidden</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">forbidden</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether access to the resource is forbidden.</p>
+<p>A <em>403 Forbidden</em> response will be sent if this function returns <code>true</code>. This status code means that access is forbidden regardless of authentication, and that the request shouldn&apos;t be repeated.</p>
+<h3 id="_generate_etag">generate_etag</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">generate_etag</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000080">binary</font></b>() | {<font color="#FF6600">weak</font> | <font color="#FF6600">strong</font>, <b><font color="#000080">binary</font></b>()} | <font color="#000080">undefined</font>
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">no</font> <font color="#FF6600">etag</font> <font color="#FF6600">value</font></tt></pre>
+</div></div>
+<p>Return the entity tag of the resource.</p>
+<p>When a binary is returned, the value is automatically parsed to a tuple. The binary must be in the same format as the etag header, including quotes.</p>
+<p>It is possible to conditionally generate an etag. When no etag can be generated, <code>undefined</code> should be returned.</p>
+<h3 id="_is_authorized">is_authorized</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">is_authorized</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <font color="#000080">true</font> | {<font color="#000080">false</font>, <font color="#009900">AuthHeader</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()}
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Return whether the user is authorized to perform the action.</p>
+<p>This function should be used to perform any necessary authentication of the user before attempting to perform any action on the resource.</p>
+<p>When authentication fails, the <code>AuthHeader</code> value will be sent in the www-authenticate header for the <em>401 Unauthorized</em> response.</p>
+<h3 id="_is_conflict">is_conflict</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">is_conflict</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the PUT request results in a conflict.</p>
+<p>A <em>409 Conflict</em> response is sent when <code>true</code>.</p>
+<h3 id="_known_methods">known_methods</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">known_methods</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> [<b><font color="#000080">binary</font></b>()]  <i><font color="#9A1900">%% case sensitive</font></i>
+<font color="#009900">Default</font> <font color="#990000">::</font> [<font color="#990000">&lt;&lt;</font><font color="#FF0000">"GET"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"HEAD"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"POST"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"PUT"</font><font color="#990000">&gt;&gt;</font>,
+            <font color="#990000">&lt;&lt;</font><font color="#FF0000">"PATCH"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"DELETE"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"OPTIONS"</font><font color="#990000">&gt;&gt;</font>]</tt></pre>
+</div></div>
+<p>Return the list of known methods.</p>
+<p>The full list of methods known by the server should be returned, regardless of their use in the resource.</p>
+<p>The default value lists the methods Cowboy knows and implement in <code>cowboy_rest</code>.</p>
+<h3 id="_languages_provided">languages_provided</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">languages_provided</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> [<b><font color="#000080">binary</font></b>()]  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">skip</font> <font color="#FF6600">this</font> <font color="#FF6600">step</font></tt></pre>
+</div></div>
+<p>Return the list of languages the resource provides in order of preference.</p>
+<p>During content negotiation Cowboy will pick the most appropriate language for the client. The client advertises languages it prefers with the accept-language header. When that header is missing, Cowboy picks the first language from the resource.</p>
+<!-- @todo We should explain precisely how languages are picked.-->
+<p>Cowboy will add the negotiated <code>language</code> to the Req object after this step completes:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">req</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">language</font> <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>()  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+}</tt></pre>
+</div></div>
+<h3 id="_last_modified">last_modified</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">last_modified</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">calendar:datetime</font></b>()
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">no</font> <font color="#FF6600">last</font> <font color="#FF6600">modified</font> <font color="#FF6600">value</font></tt></pre>
+</div></div>
+<p>Return the resource&apos;s last modification date.</p>
+<p>This date will be used to test against the if-modified-since and if-unmodified-since headers, and sent as the last-modified header in the response to GET and HEAD requests.</p>
+<h3 id="_malformed_request">malformed_request</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">malformed_request</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the request is malformed.</p>
+<p>A request is malformed when a component required by the resource is invalid. This may include the query string or individual headers. They should be parsed and validated in this function. The body should not be read at this point.</p>
+<h3 id="_moved_permanently">moved_permanently</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">moved_permanently</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> {<font color="#000080">true</font>, <font color="#009900">URI</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()} | <font color="#000080">false</font>
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the resource was permanently moved, and what its new location is.</p>
+<h3 id="_moved_temporarily">moved_temporarily</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">moved_temporarily</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> {<font color="#000080">true</font>, <font color="#009900">URI</font> <font color="#990000">::</font> <b><font color="#000000">iodata</font></b>()} | <font color="#000080">false</font>
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the resource was temporarily moved, and what its new location is.</p>
+<h3 id="_multiple_choices">multiple_choices</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">multiple_choices</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the client should engage in reactive negotiation.</p>
+<p>Return <code>true</code> when the server has multiple representations of a resource, each with their specific identifier, but is unable to determine which is best for the client. For example an image might have different sizes and the server is unable to determine the capabilities of the client.</p>
+<p>When returning <code>true</code> the server should send a body with links to the different representations. If the server has a preferred representation it can send its link inside a location header.</p>
+<p>Note that when replying manually in this callback you should either call <code>cowboy_req:reply/4</code> or remove the response body that Cowboy sets to avoid surprises.</p>
+<h3 id="_options">options</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">options</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}</tt></pre>
+</div></div>
+<p>Respond to an OPTIONS request.</p>
+<p>The response should inform the client the communication options available for this resource. By default Cowboy will send a <em>200 OK</em> response with the allow header set.</p>
+<h3 id="_previously_existed">previously_existed</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">previously_existed</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the resource existed previously.</p>
+<h3 id="_providecallback">ProvideCallback</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">ProvideCallback</font>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">cowboy_req:resp_body</font></b>()
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">crash</font></tt></pre>
+</div></div>
+<p>Return the response body.</p>
+<p>The response body can be provided either as the actual data to be sent or a tuple indicating which file to send.</p>
+<p>This function is called for both GET and HEAD requests. For the latter the body is not sent: it is only used to calculate the content length.</p>
+<!-- @todo Perhaps we can optimize HEAD requests and just-->
+<!-- allow calculating the length instead of returning the-->
+<!-- whole thing.-->
+<p>It is possible to stream the response body either by manually sending the response and returning a <code>stop</code> value; or by switching to a different handler (for example a loop handler) and manually sending the response. All headers already set by Cowboy will also be included in the response.</p>
+<h2 id="_rangecallback">RangeCallback</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">RangeCallback</font>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> [{<font color="#009900">Range</font>, <font color="#009900">Body</font>}]
+<font color="#009900">Range</font>   <font color="#990000">::</font> {<font color="#009900">From</font>, <font color="#009900">To</font>, <font color="#009900">Total</font>} | <b><font color="#000080">binary</font></b>()
+<font color="#009900">From</font>    <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">To</font>      <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">Total</font>   <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>() | <font color="#FF6600">'*'</font>
+<font color="#009900">Body</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_req:resp_body</font></b>()
+<font color="#009900">Default</font>  <font color="#990000">-</font> <font color="#FF6600">crash</font></tt></pre>
+</div></div>
+<p>Return a list of ranges for the response body.</p>
+<p>The range selected can be found in the key <code>range</code> in the Req object, as indicated in <code>range_satisfiable</code>.</p>
+<p>Instead of returning the full response body as would be done in the <code>ProvideCallback</code>, a list of ranges must be returned. There can be one or more range. When one range is returned, a normal ranged response is sent. When multiple ranges are returned, Cowboy will automatically send a multipart/byteranges response.</p>
+<p>When the total is not known the atom <code>&apos;*&apos;</code> can be returned.</p>
+<h2 id="_ranges_provided">ranges_provided</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">ranges_provided</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font> <font color="#990000">::</font> [<font color="#009900">Range</font> | <font color="#009900">Auto</font>]
+<font color="#009900">Range</font>  <font color="#990000">::</font> {
+    <b><font color="#000080">binary</font></b>(),  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+    <font color="#009900">RangeCallback</font> <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()
+}
+<font color="#009900">Auto</font>   <font color="#990000">::</font> {<font color="#990000">&lt;&lt;</font><font color="#FF0000">"bytes"</font><font color="#990000">&gt;&gt;</font>, <font color="#FF6600">auto</font>}
+<font color="#009900">Default</font> <font color="#990000">-</font> <font color="#FF6600">skip</font> <font color="#FF6600">this</font> <font color="#FF6600">step</font></tt></pre>
+</div></div>
+<p>Return the list of range units the resource provides.</p>
+<p>During content negotiation Cowboy will build an accept-ranges response header with the list of ranges provided. Cowboy does not choose a range at this time; ranges are choosen when it comes time to call the <code>ProvideCallback</code>.</p>
+<p>By default ranged requests will be handled the same as normal requests: the <code>ProvideCallback</code> will be called and the full response body will be sent.</p>
+<p>It is possible to let Cowboy handle ranged responses automatically when the range unit is bytes and the atom returned is <code>auto</code> (instead of a callback name). In that case Cowboy will call the <code>ProvideCallback</code> and split the response automatically, including by producing a multipart/byteranges response if necessary.</p>
+<h2 id="_range_satisfiable">range_satisfiable</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">range_satisfiable</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>() | {<font color="#000080">false</font>, <b><font color="#000000">non_neg_integer</font></b>() | <b><font color="#000000">iodata</font></b>()}
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Whether the range request is satisfiable.</p>
+<p>When the time comes to send the response body, and when ranges have been provided via the <code>ranges_provided</code> callback, Cowboy will process the if-range and the range request headers and ensure it is satisfiable.</p>
+<p>This callback allows making resource-specific checks before sending the ranged response. The default is to accept sending a ranged response.</p>
+<p>Cowboy adds the requested <code>range</code> to the Req object just before calling this callback:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">req</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">range</font> <font color="#990000">=&gt;</font> {
+        <b><font color="#000080">binary</font></b>(),  <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+        <font color="#009900">Range</font>
+    }
+}
+
+<font color="#009900">Range</font>     <font color="#990000">::</font> <font color="#009900">ByteRange</font> | <b><font color="#000080">binary</font></b>()
+
+<font color="#009900">ByteRange</font> <font color="#990000">::</font> [{<font color="#009900">FirstByte</font>, <font color="#009900">LastByte</font> | <font color="#FF6600">infinity</font>} | <font color="#009900">SuffixLen</font>]
+<font color="#009900">FirstByte</font> <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">LastByte</font>  <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">SuffixLen</font> <font color="#990000">::</font> <b><font color="#000000">neg_integer</font></b>()</tt></pre>
+</div></div>
+<p>Only byte ranges are parsed. Other ranges are provided as binary. Byte ranges may either be requested from first to last bytes (inclusive); from first bytes to the end (<code>infinity</code> is used to represent the last byte); or the last bytes of the representation via a negative integer (so -500 means the last 500 bytes).</p>
+<p>Returning <code>false</code> will result in a 416 Range Not Satisfiable response being sent. The content-range header will be set automatically in the response if a tuple is returned. The integer value represents the total size (in the choosen unit) of the resource. An iodata value may also be returned and will be used as-is to build the content range header, prepended with the unit choosen.</p>
+<h3 id="_rate_limited">rate_limited</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">rate_limited</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>     <font color="#990000">::</font> <font color="#000080">false</font> | {<font color="#000080">true</font>, <font color="#009900">RetryAfter</font>}
+<font color="#009900">RetryAfter</font> <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>() | <b><font color="#000000">calendar:datetime</font></b>()
+<font color="#009900">Default</font>    <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the user is rate limited.</p>
+<p>This function can be used to temporarily restrict access to a resource when the user has issued too many requests.</p>
+<p>When the resource is rate limited the <code>RetryAfter</code> value will be sent in the retry-after header for the <em>429 Too Many Requests</em> response. It indicates when the resource will become available again and can be specified as a number of seconds in the future or a specific date/time.</p>
+<h3 id="_resource_exists">resource_exists</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">resource_exists</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Return whether the resource exists.</p>
+<h3 id="_service_available">service_available</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">service_available</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Return whether the service is available.</p>
+<p>A <em>503 Service Unavailable</em> response will be sent when this function returns <code>false</code>.</p>
+<h3 id="_uri_too_long">uri_too_long</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">uri_too_long</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">false</font></tt></pre>
+</div></div>
+<p>Return whether the requested URI is too long.</p>
+<p>This function can be used to further restrict the length of the URI for this specific resource.</p>
+<h3 id="_valid_content_headers">valid_content_headers</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">valid_content_headers</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Return whether the content headers are valid.</p>
+<p>This callback can be used to reject requests that have invalid content header values, for example an unsupported content-encoding.</p>
+<h3 id="_valid_entity_length">valid_entity_length</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">valid_entity_length</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> <b><font color="#000000">boolean</font></b>()
+<font color="#009900">Default</font> <font color="#990000">::</font> <font color="#000080">true</font></tt></pre>
+</div></div>
+<p>Return whether the request body length is within acceptable boundaries.</p>
+<p>A <em>413 Request Entity Too Large</em> response will be sent if this function returns <code>false</code>.</p>
+<h3 id="_variances">variances</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">variances</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Result</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+
+<font color="#009900">Result</font>  <font color="#990000">::</font> [<b><font color="#000080">binary</font></b>()]  <i><font color="#9A1900">%% case insensitive</font></i>
+<font color="#009900">Default</font> <font color="#990000">::</font> []</tt></pre>
+</div></div>
+<p>Return the list of request headers that affect the representation of the resource.</p>
+<p>Cowboy automatically adds the accept, accept-charset and accept-language headers when necessary. It&apos;s also useful to note that some standard headers also do not need to be listed here, like the authorization header.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: The <code>ranges_provided</code>, <code>range_satisfiable</code> and the <code>RangeCallback</code> callbacks have been added.
+</li>
+<li><strong>2.11</strong>: The <code>generate_etag</code> callback can now return <code>undefined</code> to conditionally avoid generating an etag.
+</li>
+<li><strong>2.9</strong>: An <code>AcceptCallback</code> can now return <code>{created, URI}</code> or <code>{see_other, URI}</code>. The return value <code>{true, URI}</code> is deprecated.
+</li>
+<li><strong>2.7</strong>: The media type wildcard in <code>content_types_accepted</code> is now documented.
+</li>
+<li><strong>2.6</strong>: The callback <code>rate_limited</code> was added.
+</li>
+<li><strong>2.1</strong>: The <code>switch_handler</code> return value was added.
+</li>
+<li><strong>1.0</strong>: Behavior introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_handler">cowboy_handler(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.13/manual/cowboy_router.compile/index.html
new file mode 100644
index 00000000..a03c1a73
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_router.compile/index.html
@@ -0,0 +1,203 @@
+<!DOCTYPE html>
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_router:compile(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_router:compile - Compile routes to the resources</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">compile</font></b>(<b><font color="#000000">cowboy_router:routes</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">cowboy_router:dispatch_rules</font></b>()</tt></pre>
+</div></div>
+<p>Compile routes to the resources.</p>
+<p>Takes a human readable list of routes and transforms it into a form more efficient to process.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>Routes</dt>
+<dd><p>Human readable list of routes.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>An opaque dispatch rules value is returned. This value must be given to Cowboy as a middleware environment value.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Compile routes and start a listener</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
+    {<font color="#FF6600">'_'</font>, [
+        {<font color="#FF0000">"/"</font>, <font color="#FF6600">toppage_h</font>, []},
+        {<font color="#FF0000">"/[...]"</font>, <font color="#FF6600">cowboy_static</font>, {<font color="#FF6600">priv_dir</font>, <font color="#FF6600">my_example_app</font>, <font color="#FF0000">""</font>}}
+    ]}
+]),
+
+{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_clear</font></b>(<font color="#FF6600">example</font>, [{<font color="#FF6600">port</font>, <font color="#993399">8080</font>}], #{
+    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
+})<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_router">cowboy_router(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+
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+                </ul>
+              </nav>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_router/index.html b/docs/en/cowboy/2.13/manual/cowboy_router/index.html
new file mode 100644
index 00000000..829a19b6
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_router/index.html
@@ -0,0 +1,220 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <title>Nine Nines: cowboy_router(3)</title>
+
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
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+<div id="contents" class="two_col">
+<div class="container">
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+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>cowboy_router(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_router - Router middleware</p>
+<h2 id="_description">Description</h2>
+<p>The <code>cowboy_router</code> middleware maps the requested host and path to the handler to be used for processing the request.</p>
+<p>The router takes the <code>dispatch</code> rules as input from the middleware environment. Dispatch rules are generated by calling the <a href="../cowboy_router.compile">cowboy_router:compile(3)</a> function. The environment can contain the rules directly or a tuple <code>{persistent_term, Key}</code>, in which case Cowboy will call <code>persistent_term:get(Key)</code> to retrieve the dispatch rules.</p>
+<p>When a route matches, the router sets the <code>handler</code> and <code>handler_opts</code> middleware environment values containing the handler module and initial state, respectively.</p>
+<p>The router will stop execution when no route matches. It will send a 400 response if no host was found, and a 404 response otherwise.</p>
+<h2 id="_exports">Exports</h2>
+<ul><li><a href="../cowboy_router.compile">cowboy_router:compile(3)</a> - Compile routes to the resources
+</li>
+</ul>
+<h2 id="_types">Types</h2>
+<h3 id="_bindings">bindings()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">bindings</font></b>() <font color="#990000">::</font> #{<b><font color="#000080">atom</font></b>() <font color="#990000">=&gt;</font> <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>Bindings found during routing.</p>
+<h3 id="_dispatch_rules">dispatch_rules()</h3>
+<p>Opaque type containing the compiled routes.</p>
+<h3 id="_routes">routes()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">routes</font></b>() <font color="#990000">=</font> [
+    {<font color="#009900">Host</font>, <font color="#009900">PathList</font>} |
+    {<font color="#009900">Host</font>, <font color="#009900">Fields</font>, <font color="#009900">PathList</font>}
+]
+
+<font color="#009900">PathList</font> <font color="#990000">::</font> [
+    {<font color="#009900">Path</font>, <font color="#009900">Handler</font>, <font color="#009900">InitialState</font>} |
+    {<font color="#009900">Path</font>, <font color="#009900">Fields</font>, <font color="#009900">Handler</font>, <font color="#009900">InitialState</font>}
+]
+
+<font color="#009900">Host</font>         <font color="#990000">::</font> <font color="#FF6600">'_'</font> | <b><font color="#000000">iodata</font></b>()
+<font color="#009900">Path</font>         <font color="#990000">::</font> <font color="#FF6600">'_'</font> | <b><font color="#000000">iodata</font></b>()
+<font color="#009900">Fields</font>       <font color="#990000">::</font> <b><font color="#000000">cowboy:fields</font></b>()
+<font color="#009900">Handler</font>      <font color="#990000">::</font> <b><font color="#000000">module</font></b>()
+<font color="#009900">InitialState</font> <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>Human readable list of routes to handlers.</p>
+<p>Cowboy uses this list to map hosts and paths, optionally augmented with constraints applied to the bindings, to handler modules.</p>
+<p>The syntax for routes is currently defined in the user guide.</p>
+<!-- @todo The syntax should probably be in this module,-->
+<!-- and the user guide show more practical examples.-->
+<h3 id="_tokens">tokens()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">tokens</font></b>() <font color="#990000">::</font> [<b><font color="#000080">binary</font></b>()]</tt></pre>
+</div></div>
+<p>List of <code>host_info</code> and <code>path_info</code> tokens that were found using the <code>...</code> syntax.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_req.binding">cowboy_req:binding(3)</a>, <a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a>, <a href="../cowboy_req.host_info">cowboy_req:host_info(3)</a>, <a href="../cowboy_req.path_info">cowboy_req:path_info(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_static/index.html b/docs/en/cowboy/2.13/manual/cowboy_static/index.html
new file mode 100644
index 00000000..b872faa6
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_static/index.html
@@ -0,0 +1,280 @@
+<!DOCTYPE html>
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+
+<h1 class="lined-header"><span>cowboy_static(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_static - Static file handler</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_static</code> implements file serving capabilities using the REST semantics provided by <code>cowboy_rest</code>.</p>
+<p>The static file handler is a pre-written handler coming with Cowboy. To serve files, use it in your routes.</p>
+<h2 id="_options">Options</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> {<font color="#FF6600">priv_file</font>, <font color="#009900">App</font>, <font color="#009900">Path</font>}
+        | {<font color="#FF6600">priv_file</font>, <font color="#009900">App</font>, <font color="#009900">Path</font>, <font color="#009900">Extra</font>}
+        | {<font color="#FF6600">file</font>, <font color="#009900">Path</font>}
+        | {<font color="#FF6600">file</font>, <font color="#009900">Path</font>, <font color="#009900">Extra</font>}
+        | {<font color="#FF6600">priv_dir</font>, <font color="#009900">App</font>, <font color="#009900">Path</font>}
+        | {<font color="#FF6600">priv_dir</font>, <font color="#009900">App</font>, <font color="#009900">Path</font>, <font color="#009900">Extra</font>}
+        | {<font color="#FF6600">dir</font>, <font color="#009900">Path</font>}
+        | {<font color="#FF6600">dir</font>, <font color="#009900">Path</font>, <font color="#009900">Extra</font>}
+
+<font color="#009900">App</font>        <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()
+<font color="#009900">Path</font>       <font color="#990000">::</font> <b><font color="#000080">binary</font></b>() | <b><font color="#000000">string</font></b>()
+<font color="#009900">Extra</font>      <font color="#990000">::</font> [<font color="#009900">Charset</font> | <font color="#009900">Etag</font> | <font color="#009900">Mimetypes</font>]
+
+<font color="#009900">Charset</font>    <font color="#990000">::</font> {<font color="#FF6600">charset</font>, <b><font color="#000000">module</font></b>(), <b><font color="#000080">function</font></b>()}
+            | {<font color="#FF6600">charset</font>, <b><font color="#000080">binary</font></b>()}
+
+<font color="#009900">Etag</font>       <font color="#990000">::</font> {<font color="#FF6600">etag</font>, <b><font color="#000000">module</font></b>(), <b><font color="#000080">function</font></b>()}
+            | {<font color="#FF6600">etag</font>, <font color="#000080">false</font>}
+
+<font color="#009900">Mimetypes</font>  <font color="#990000">::</font> {<font color="#FF6600">mimetypes</font>, <b><font color="#000000">module</font></b>(), <b><font color="#000080">function</font></b>()}
+            | {<font color="#FF6600">mimetypes</font>, <b><font color="#000080">binary</font></b>() | <font color="#009900">ParsedMime</font>}
+
+<font color="#009900">ParsedMime</font> <font color="#990000">::</font> {<font color="#009900">Type</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">SubType</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Params</font>}
+<font color="#009900">Params</font>     <font color="#990000">::</font> [{<font color="#009900">Key</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()}]</tt></pre>
+</div></div>
+<p>Static handler configuration.</p>
+<dl><dt>priv_file</dt>
+<dd><p>Send a file.</p>
+<p>The path is relative to the given application&apos;s private directory.</p>
+</dd>
+<dt>file</dt>
+<dd><p>Send a file.</p>
+<p>The path is either absolute or relative to the Erlang node&apos;s current directory.</p>
+</dd>
+<dt>priv_dir</dt>
+<dd><p>Recursively serve files from a directory.</p>
+<p>The path is relative to the given application&apos;s private directory.</p>
+</dd>
+<dt>dir</dt>
+<dd><p>Recursively serve files from a directory.</p>
+<p>The path is either absolute or relative to the Erlang node&apos;s current directory.</p>
+</dd>
+</dl>
+<p>The extra options allow you to define how the etag should be calculated and how the MIME type of files should be detected.</p>
+<p>By default the static handler will not send a charset with the response. You can provide a specific charset that will be used for all files using the text media type, or provide a module and function that will be called when needed:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">detect_charset</font></b>(<font color="#009900">Path</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()) <font color="#990000">-&gt;</font> <font color="#009900">Charset</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>A charset must always be returned even if it doesn&apos;t make sense considering the media type of the file. A good default is <code>&lt;&lt;&quot;utf-8&quot;&gt;&gt;</code>.</p>
+<p>By default the static handler will generate an etag based on the size and modification time of the file. You may disable the etag entirely with <code>{etag, false}</code> or provide a module and function that will be called when needed:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">generate_etag</font></b>(<font color="#009900">Path</font>, <font color="#009900">Size</font>, <font color="#009900">Mtime</font>) <font color="#990000">-&gt;</font> {<font color="#FF6600">strong</font> | <font color="#FF6600">weak</font>, <b><font color="#000080">binary</font></b>()}
+
+<font color="#009900">Path</font>  <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()
+<font color="#009900">Size</font>  <font color="#990000">::</font> <b><font color="#000000">non_neg_integer</font></b>()
+<font color="#009900">Mtime</font> <font color="#990000">::</font> <b><font color="#000000">file:date_time</font></b>()</tt></pre>
+</div></div>
+<p>By default the static handler will detect Web-related MIME types by looking at the file extension. You can provide a specific MIME type that will always be used, or a module and function that will be called when needed:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">detect_mimetype</font></b>(<font color="#009900">Path</font>) <font color="#990000">-&gt;</font> <font color="#009900">ParsedMime</font>
+
+<font color="#009900">Path</font>       <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()
+<font color="#009900">ParsedMime</font> <font color="#990000">::</font> {<font color="#009900">Type</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">SubType</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Params</font>}
+<font color="#009900">Params</font>     <font color="#990000">::</font> [{<font color="#009900">Key</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>(), <font color="#009900">Value</font> <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()}]</tt></pre>
+</div></div>
+<!-- @todo Case sensitivity of parsed mime content?-->
+<p>Cowboy comes with two such functions; the default function <code>cow_mimetypes:web/1</code>, and a second function generated from the Apache <em>mime.types</em> file, <code>cow_mimetypes:all/1</code>.</p>
+<p>The MIME type function should return <code>{&lt;&lt;&quot;application&quot;&gt;&gt;, &lt;&lt;&quot;octet-stream&quot;&gt;&gt;, []}</code> when it fails to detect a file&apos;s MIME type.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: Support for range requests was added in 2.6 and is now considered stable.
+</li>
+<li><strong>2.6</strong>: The <code>charset</code> extra option was added.
+</li>
+<li><strong>1.0</strong>: Handler introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Custom etag function</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">generate_etag</font></b>(<font color="#009900">Path</font>, <font color="#009900">Size</font>, <font color="#009900">Mtime</font>) <font color="#990000">-&gt;</font>
+    {<font color="#FF6600">strong</font>, <b><font color="#000000">integer_to_binary</font></b>(
+        <b><font color="#000000">erlang:phash2</font></b>({<font color="#009900">Path</font>, <font color="#009900">Size</font>, <font color="#009900">Mtime</font>}, <font color="#993399">16#ffffffff</font>))}<font color="#990000">.</font></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Custom MIME type function</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">always_octet_stream</font></b>(<font color="#009900">_Path</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#0000FF">case</font></b> <b><font color="#000000">filename:extension</font></b>(<font color="#009900">Path</font>) <b><font color="#0000FF">of</font></b>
+        <font color="#990000">&lt;&lt;</font><font color="#FF0000">".erl"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">-&gt;</font> {<font color="#990000">&lt;&lt;</font><font color="#FF0000">"text"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"plain"</font><font color="#990000">&gt;&gt;</font>, []};
+        <font color="#990000">_</font> <font color="#990000">-&gt;</font> {<font color="#990000">&lt;&lt;</font><font color="#FF0000">"application"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"octet-stream"</font><font color="#990000">&gt;&gt;</font>, []}
+    <b><font color="#0000FF">end</font></b><font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_router">cowboy_router(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_stream.data/index.html b/docs/en/cowboy/2.13/manual/cowboy_stream.data/index.html
new file mode 100644
index 00000000..be72bb53
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_stream.data/index.html
@@ -0,0 +1,217 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+
+<h1 class="lined-header"><span>cowboy_stream:data(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_stream:data - Handle data for a stream</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">data</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">IsFin</font>, <font color="#009900">Data</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Commands</font>, <font color="#009900">State</font>}
+
+<font color="#009900">StreamID</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:stream_id</font></b>()
+<font color="#009900">IsFin</font>    <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:fin</font></b>()
+<font color="#009900">Data</font>     <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()
+<font color="#009900">Commands</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:commands</font></b>()
+<font color="#009900">State</font>    <font color="#990000">-</font> <font color="#FF6600">opaque</font></tt></pre>
+</div></div>
+<p>Handle data for a stream.</p>
+<p>This function should be called by all stream handlers. It will propagate data to the next configured stream handler. Handlers do not have to propagate data that has been fully handled.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>StreamID</dt>
+<dd><p>The stream ID.</p>
+</dd>
+<dt>IsFin</dt>
+<dd><p>Whether this is the end of the request body.</p>
+</dd>
+<dt>Data</dt>
+<dd><p>The data received.</p>
+</dd>
+<dt>Commands</dt>
+<dd><p>The commands to be executed.</p>
+</dd>
+<dt>State</dt>
+<dd><p>The state for the next stream handler.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A list of commands and an opaque state is returned.</p>
+<p>The list of commands returned should be included in the commands returned from the current stream handler. It can be modified if necessary.</p>
+<p>The state should be stored in the current stream handler&apos;s state and passed to <code>cowboy_stream</code> when necessary. The state should be treated as opaque.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Propagate data to the next stream handler</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">data</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">IsFin</font>, <font color="#009900">Data</font>, <font color="#009900">State</font><font color="#990000">=</font><font color="#008080">#state</font>{<font color="#0000FF">next</font><font color="#990000">=</font><font color="#009900">Next0</font>}) <font color="#990000">-&gt;</font>
+    <font color="#009900">MyCommands</font> <font color="#990000">=</font> <b><font color="#000000">my_commands</font></b>(),
+    {<font color="#009900">Commands</font>, <font color="#009900">Next</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_stream:data</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">IsFin</font>, <font color="#009900">Data</font>, <font color="#009900">Next0</font>),
+    {<font color="#009900">MyCommands</font> <font color="#990000">++</font> <font color="#009900">Commands</font>, <font color="#008080">#state</font>{<font color="#0000FF">next</font><font color="#990000">=</font><font color="#009900">Next</font>}}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_stream.init">cowboy_stream:init(3)</a>, <a href="../cowboy_stream.info">cowboy_stream:info(3)</a>, <a href="../cowboy_stream.terminate">cowboy_stream:terminate(3)</a>, <a href="../cowboy_stream.early_error">cowboy_stream:early_error(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
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+	
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+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/index.html b/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/index.html
new file mode 100644
index 00000000..86342d66
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/index.html
@@ -0,0 +1,214 @@
+<!DOCTYPE html>
+<html lang="en">
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+
+<h1 class="lined-header"><span>cowboy_stream:early_error(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_stream:early_error - Handle an early error for a stream</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">early_error</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">PartialReq</font>, <font color="#009900">Resp</font>, <font color="#009900">Opts</font>) <font color="#990000">-&gt;</font> <font color="#009900">Resp</font>
+
+<font color="#009900">StreamID</font>   <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:stream_id</font></b>()
+<font color="#009900">Reason</font>     <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:reason</font></b>()
+<font color="#009900">PartialReq</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:partial_req</font></b>()
+<font color="#009900">Resp</font>       <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:resp_command</font></b>()
+<font color="#009900">Opts</font>       <font color="#990000">::</font> <b><font color="#000000">cowboy:opts</font></b>()</tt></pre>
+</div></div>
+<p>Handle an early error for a stream.</p>
+<p>This function should be called by all stream handlers. It will propagate the early error to the next configured stream handler.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>StreamID</dt>
+<dd><p>The stream ID.</p>
+</dd>
+<dt>Reason</dt>
+<dd><p>Reason for termination.</p>
+</dd>
+<dt>PartialReq</dt>
+<dd><p>The request data that has been received so far.</p>
+</dd>
+<dt>Resp</dt>
+<dd><p>The response that will be sent as a result of the early error.</p>
+<p>It may be modified by the stream handler before or after being propagated to the next handler.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>The protocol options.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The response to be sent as a result of the early error.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Propagate the early error to the next stream handler</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">early_error</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">PartialReq</font>, <font color="#009900">Resp</font>, <font color="#009900">Opts</font>) <font color="#990000">-&gt;</font>
+    <b><font color="#000000">cowboy_stream:early_error</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">PartialReq</font>, <font color="#009900">Resp</font>, <font color="#009900">Opts</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_stream.init">cowboy_stream:init(3)</a>, <a href="../cowboy_stream.data">cowboy_stream:data(3)</a>, <a href="../cowboy_stream.info">cowboy_stream:info(3)</a>, <a href="../cowboy_stream.terminate">cowboy_stream:terminate(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_stream.info/index.html b/docs/en/cowboy/2.13/manual/cowboy_stream.info/index.html
new file mode 100644
index 00000000..52e2afa5
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_stream.info/index.html
@@ -0,0 +1,213 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
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+    <title>Nine Nines: cowboy_stream:info(3)</title>
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+
+<h1 class="lined-header"><span>cowboy_stream:info(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_stream:info - Handle a message for a stream</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">info</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Commands</font>, <font color="#009900">State</font>}
+
+<font color="#009900">StreamID</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:stream_id</font></b>()
+<font color="#009900">Info</font>     <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Commands</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:commands</font></b>()
+<font color="#009900">State</font>    <font color="#990000">-</font> <font color="#FF6600">opaque</font></tt></pre>
+</div></div>
+<p>Handle a message for a stream.</p>
+<p>This function should be called by all stream handlers. It will propagate the event to the next configured stream handler. Handlers do not have to propagate events that have been fully handled.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>StreamID</dt>
+<dd><p>The stream ID.</p>
+</dd>
+<dt>Info</dt>
+<dd><p>The event received.</p>
+</dd>
+<dt>Commands</dt>
+<dd><p>The commands to be executed.</p>
+</dd>
+<dt>State</dt>
+<dd><p>The state for the next stream handler.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A list of commands and an opaque state is returned.</p>
+<p>The list of commands returned should be included in the commands returned from the current stream handler. It can be modified if necessary.</p>
+<p>The state should be stored in the current stream handler&apos;s state and passed to <code>cowboy_stream</code> when necessary. The state should be treated as opaque.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Propagate an event to the next stream handler</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">info</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Info</font>, <font color="#009900">State</font><font color="#990000">=</font><font color="#008080">#state</font>{<font color="#0000FF">next</font><font color="#990000">=</font><font color="#009900">Next0</font>}) <font color="#990000">-&gt;</font>
+    <font color="#009900">MyCommands</font> <font color="#990000">=</font> <b><font color="#000000">my_commands</font></b>(),
+    {<font color="#009900">Commands</font>, <font color="#009900">Next</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_stream:info</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Info</font>, <font color="#009900">Next0</font>),
+    {<font color="#009900">MyCommands</font> <font color="#990000">++</font> <font color="#009900">Commands</font>, <font color="#008080">#state</font>{<font color="#0000FF">next</font><font color="#990000">=</font><font color="#009900">Next</font>}}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_stream.init">cowboy_stream:init(3)</a>, <a href="../cowboy_stream.data">cowboy_stream:data(3)</a>, <a href="../cowboy_stream.terminate">cowboy_stream:terminate(3)</a>, <a href="../cowboy_stream.early_error">cowboy_stream:early_error(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
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+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
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+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_stream.init/index.html b/docs/en/cowboy/2.13/manual/cowboy_stream.init/index.html
new file mode 100644
index 00000000..9b04ab6a
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_stream.init/index.html
@@ -0,0 +1,217 @@
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+
+<h1 class="lined-header"><span>cowboy_stream:init(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_stream:init - Initialize a stream</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Req</font>, <font color="#009900">Opts</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Commands</font>, <font color="#009900">State</font>}
+
+<font color="#009900">StreamID</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:stream_id</font></b>()
+<font color="#009900">Req</font>      <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">Opts</font>     <font color="#990000">::</font> <b><font color="#000000">cowboy:opts</font></b>()
+<font color="#009900">Commands</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:commands</font></b>()
+<font color="#009900">State</font>    <font color="#990000">-</font> <font color="#FF6600">opaque</font></tt></pre>
+</div></div>
+<p>Initialize a stream.</p>
+<p>This function must be called by all stream handlers. It will initialize the next configured stream handler.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>StreamID</dt>
+<dd><p>The stream ID.</p>
+</dd>
+<dt>Req</dt>
+<dd><p>The Req object.</p>
+</dd>
+<dt>Opts</dt>
+<dd><p>The protocol options.</p>
+</dd>
+<dt>Commands</dt>
+<dd><p>The commands to be executed.</p>
+</dd>
+<dt>State</dt>
+<dd><p>The state for the next stream handler.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A list of commands and an opaque state is returned.</p>
+<p>The list of commands returned should be included in the commands returned from the current stream handler. It can be modified if necessary.</p>
+<p>The state should be stored in the current stream handler&apos;s state and passed to <code>cowboy_stream</code> when necessary. The state should be treated as opaque.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Initialize the next stream handler</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Req</font>, <font color="#009900">Opts</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">MyCommands</font> <font color="#990000">=</font> <b><font color="#000000">my_commands</font></b>(),
+    {<font color="#009900">Commands</font>, <font color="#009900">Next</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy_stream:init</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Req</font>, <font color="#009900">Opts</font>),
+    {<font color="#009900">MyCommands</font> <font color="#990000">++</font> <font color="#009900">Commands</font>, <font color="#008080">#state</font>{<font color="#0000FF">next</font><font color="#990000">=</font><font color="#009900">Next</font>}}<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_stream.data">cowboy_stream:data(3)</a>, <a href="../cowboy_stream.info">cowboy_stream:info(3)</a>, <a href="../cowboy_stream.terminate">cowboy_stream:terminate(3)</a>, <a href="../cowboy_stream.early_error">cowboy_stream:early_error(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
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+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/index.html b/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/index.html
new file mode 100644
index 00000000..cd01f8a9
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/index.html
@@ -0,0 +1,206 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
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+
+<h1 class="lined-header"><span>cowboy_stream:terminate(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_stream:terminate - Terminate a stream</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">terminate</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>
+
+<font color="#009900">StreamID</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:stream_id</font></b>()
+<font color="#009900">Reason</font>   <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:reason</font></b>()
+<font color="#009900">State</font>    <font color="#990000">-</font> <font color="#FF6600">opaque</font></tt></pre>
+</div></div>
+<p>Terminate a stream.</p>
+<p>This function must be called by all stream handlers. It will terminate the next configured stream handler.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>StreamID</dt>
+<dd><p>The stream ID.</p>
+</dd>
+<dt>Reason</dt>
+<dd><p>Reason for termination.</p>
+</dd>
+<dt>State</dt>
+<dd><p>The state for the next stream handler.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Terminate the next stream handler</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">terminate</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">State</font><font color="#990000">=</font><font color="#008080">#state</font>{<font color="#0000FF">next</font><font color="#990000">=</font><font color="#009900">Next0</font>}) <font color="#990000">-&gt;</font>
+    <b><font color="#000000">my_termination</font></b>(<font color="#009900">State</font>),
+    <b><font color="#000000">cowboy_stream:terminate</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">Next0</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_stream.init">cowboy_stream:init(3)</a>, <a href="../cowboy_stream.data">cowboy_stream:data(3)</a>, <a href="../cowboy_stream.info">cowboy_stream:info(3)</a>, <a href="../cowboy_stream.early_error">cowboy_stream:early_error(3)</a></p>
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+	Cowboy
+	2.13
+	Function Reference
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+<h1 class="lined-header"><span>cowboy_stream(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_stream - Stream handlers</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_stream</code> defines a callback interface and a protocol for handling HTTP streams.</p>
+<p>An HTTP request and its associated response is called a stream. A connection may have many streams. In HTTP/1.1 they are executed sequentially, while in HTTP/2 they are executed concurrently.</p>
+<p>Cowboy calls the stream handler for nearly all events related to a stream. Exceptions vary depending on the protocol.</p>
+<p>Extra care must be taken when implementing stream handlers to ensure compatibility. While some modification of the events and commands is allowed, it is generally not a good idea to completely discard them.</p>
+<h2 id="_callbacks">Callbacks</h2>
+<p>Stream handlers must implement the following interface:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Req</font>, <font color="#009900">Opts</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Commands</font>, <font color="#009900">State</font>}
+<b><font color="#000000">data</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">IsFin</font>, <font color="#009900">Data</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Commands</font>, <font color="#009900">State</font>}
+<b><font color="#000000">info</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Info</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> {<font color="#009900">Commands</font>, <font color="#009900">State</font>}
+<b><font color="#000000">terminate</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <b><font color="#000000">any</font></b>()
+<b><font color="#000000">early_error</font></b>(<font color="#009900">StreamID</font>, <font color="#009900">Reason</font>, <font color="#009900">PartialReq</font>, <font color="#009900">Resp</font>, <font color="#009900">Opts</font>) <font color="#990000">-&gt;</font> <font color="#009900">Resp</font>
+
+<font color="#009900">StreamID</font>   <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:streamid</font></b>()
+<font color="#009900">Req</font>        <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">Opts</font>       <font color="#990000">::</font> <b><font color="#000000">cowboy:opts</font></b>()
+<font color="#009900">Commands</font>   <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:commands</font></b>()
+<font color="#009900">State</font>      <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">IsFin</font>      <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:fin</font></b>()
+<font color="#009900">Data</font>       <font color="#990000">::</font> <b><font color="#000080">binary</font></b>()
+<font color="#009900">Info</font>       <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Reason</font>     <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:reason</font></b>()
+<font color="#009900">PartialReq</font>  <font color="#990000">-</font> <b><font color="#000000">cowboy_req:req</font></b>(), <font color="#FF6600">except</font> <font color="#FF6600">all</font> <font color="#FF6600">fields</font> <font color="#FF6600">are</font> <font color="#FF6600">optional</font>
+<font color="#009900">Resp</font>       <font color="#990000">::</font> <b><font color="#000000">cowboy_stream:resp_command</font></b>()</tt></pre>
+</div></div>
+<p>HTTP/1.1 will initialize a stream only when the request-line and all headers have been received. When errors occur before that point Cowboy will call the callback <code>early_error/5</code> with a partial request, the error reason and the response Cowboy intends to send. All other events go through the stream handler using the normal callbacks.</p>
+<p>HTTP/2 will initialize the stream when the <code>HEADERS</code> block has been fully received and decoded. Any protocol error occurring before that will not result in a response being sent and will therefore not go through the stream handler. In addition Cowboy may terminate streams without sending an HTTP response back.</p>
+<p>The stream is initialized by calling <code>init/3</code>. All streams that are initialized will eventually be terminated by calling <code>terminate/3</code>.</p>
+<p>When Cowboy receives data for the stream it will call <code>data/4</code>. The data given is the request body after any transfer decoding has been applied.</p>
+<p>When Cowboy receives a message addressed to a stream, or when Cowboy needs to inform the stream handler that an internal event has occurred, it will call <code>info/3</code>.</p>
+<h2 id="commands">Commands</h2>
+<p>Stream handlers can return a list of commands to be executed from the <code>init/3</code>, <code>data/4</code> and <code>info/3</code> callbacks. In addition, the <code>early_error/5</code> callback must return a response command.</p>
+<!-- @todo The logger option and the {log, Level, Format, Args}-->
+<!-- options need to be documented and tested.-->
+<p>The order in which the commands are given matters. For example, when sending a response and at the same time creating a new child process, the first command should be the <code>spawn</code> and the second the <code>response</code>. The reason for that is that the sending of the response may result in a socket error which leads to the termination of the connection before the rest of the commands are executed.</p>
+<p>The following commands are defined:</p>
+<h3 id="inform_command">inform</h3>
+<p>Send an informational response to the client.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">inform</font>, <b><font color="#000000">cowboy:http_status</font></b>(), <b><font color="#000000">cowboy:http_headers</font></b>()}</tt></pre>
+</div></div>
+<p>Any number of informational responses may be sent, but only until the final response is sent.</p>
+<h3 id="response_command">response</h3>
+<p>Send a response to the client.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">response</font>, <b><font color="#000000">cowboy:http_status</font></b>(), <b><font color="#000000">cowboy:http_headers</font></b>(),
+    <b><font color="#000000">cowboy_req:resp_body</font></b>()}</tt></pre>
+</div></div>
+<p>No more data can be sent after this command.</p>
+<p>Note that in Cowboy it is the <code>cowboy_req</code> module that sets the date and server headers. When using the command directly those headers will not be added.</p>
+<h3 id="headers_command">headers</h3>
+<p>Initiate a response to the client.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">headers</font>, <b><font color="#000000">cowboy:http_status</font></b>(), <b><font color="#000000">cowboy:http_headers</font></b>()}</tt></pre>
+</div></div>
+<p>This initiates a response to the client. The stream will end when a data command with the <code>fin</code> flag or a trailer command is returned.</p>
+<p>Note that in Cowboy it is the <code>cowboy_req</code> module that sets the date and server headers. When using the command directly those headers will not be added.</p>
+<h3 id="data_command">data</h3>
+<p>Send data to the client.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">data</font>, <b><font color="#000000">fin</font></b>(), <b><font color="#000000">cowboy_req:resp_body</font></b>()}</tt></pre>
+</div></div>
+<h3 id="trailers_command">trailers</h3>
+<p>Send response trailers to the client.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">trailers</font>, <b><font color="#000000">cowboy:http_headers</font></b>()}</tt></pre>
+</div></div>
+<h3 id="push_command">push</h3>
+<p>Push a resource to the client.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">push</font>, <font color="#009900">Method</font>, <font color="#009900">Scheme</font>, <font color="#009900">Host</font>, <b><font color="#000000">inet:port_number</font></b>(),
+    <font color="#009900">Path</font>, <font color="#009900">Qs</font>, <b><font color="#000000">cowboy:http_headers</font></b>()}
+
+<font color="#009900">Method</font> <font color="#990000">=</font> <font color="#009900">Scheme</font> <font color="#990000">=</font> <font color="#009900">Host</font> <font color="#990000">=</font> <font color="#009900">Path</font> <font color="#990000">=</font> <font color="#009900">Qs</font> <font color="#990000">=</font> <b><font color="#000080">binary</font></b>()</tt></pre>
+</div></div>
+<p>The command will be ignored if the protocol does not provide any server push mechanism.</p>
+<h3 id="_flow">flow</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">flow</font>, <b><font color="#000000">pos_integer</font></b>()}</tt></pre>
+</div></div>
+<p>Request more data to be read from the request body. The exact behavior depends on the protocol.</p>
+<h3 id="_spawn">spawn</h3>
+<p>Inform Cowboy that a process was spawned and should be supervised.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<b><font color="#000080">spawn</font></b>, <b><font color="#000080">pid</font></b>(), <b><font color="#000000">timeout</font></b>()}</tt></pre>
+</div></div>
+<h3 id="_error_response">error_response</h3>
+<p>Send an error response if no response was sent previously.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">error_response</font>, <b><font color="#000000">cowboy:http_status</font></b>(), <b><font color="#000000">cowboy:http_headers</font></b>(), <b><font color="#000000">iodata</font></b>()}</tt></pre>
+</div></div>
+<h3 id="switch_protocol_command">switch_protocol</h3>
+<p>Switch to a different protocol.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">switch_protocol</font>, <b><font color="#000000">cowboy:http_headers</font></b>(), <b><font color="#000000">module</font></b>(), <b><font color="#000000">state</font></b>()}</tt></pre>
+</div></div>
+<p>Contains the headers that will be sent in the 101 response, along with the module implementing the protocol we are switching to and its initial state.</p>
+<p>Note that the 101 informational response will not be sent after a final response.</p>
+<h3 id="_stop">stop</h3>
+<p>Stop the stream.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#FF6600">stop</font></tt></pre>
+</div></div>
+<p>While no more data can be sent after the <code>fin</code> flag was set, the stream is still tracked by Cowboy until it is stopped by the handler.</p>
+<p>The behavior when stopping a stream for which no response has been sent will vary depending on the protocol. The stream will end successfully as far as the client is concerned.</p>
+<p>To indicate that an error occurred, either use <code>error_response</code> before stopping, or use <code>internal_error</code>.</p>
+<p>No other command can be executed after the <code>stop</code> command.</p>
+<h3 id="_internal_error">internal_error</h3>
+<p>Stop the stream with an error.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">internal_error</font>, <font color="#009900">Reason</font>, <font color="#009900">HumanReadable</font>}
+
+<font color="#009900">Reason</font>        <font color="#990000">=</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">HumanReadable</font> <font color="#990000">=</font> <b><font color="#000080">atom</font></b>()</tt></pre>
+</div></div>
+<p>This command should be used when the stream cannot continue because of an internal error. An <code>error_response</code> command may be sent before that to advertise to the client why the stream is dropped.</p>
+<h3 id="_log">log</h3>
+<p>Log a message.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<b><font color="#000080">log</font></b>, <b><font color="#000000">logger:level</font></b>(), <b><font color="#000000">io:format</font></b>(), <b><font color="#000080">list</font></b>()}</tt></pre>
+</div></div>
+<p>This command can be used to log a message using the configured <code>logger</code> module.</p>
+<h3 id="_set_options">set_options</h3>
+<p>Set protocol options.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">set_options</font>, <b><font color="#000000">map</font></b>()}</tt></pre>
+</div></div>
+<p>This can also be used to override stream handler options. For example this is supported by <a href="../cowboy_compress_h">cowboy_compress_h(3)</a>.</p>
+<p>Not all options can be overridden. Please consult the relevant option&apos;s documentation for details.</p>
+<h2 id="_predefined_events">Predefined events</h2>
+<p>Cowboy will forward all messages sent to the stream to the <code>info/3</code> callback. To send a message to a stream, the function <a href="../cowboy_req.cast">cowboy_req:cast(3)</a> can be used.</p>
+<p>Cowboy will also forward the exit signals for the processes that the stream spawned.</p>
+<p>When Cowboy needs to send a response it will trigger an event that looks exactly like the corresponding command. This event must be returned to be processed by Cowboy (which is done automatically when using <a href="../cowboy_stream_h">cowboy_stream_h(3)</a>).</p>
+<p>Cowboy may trigger the following events on its own, regardless of the stream handlers configured: <a href="#inform_command">inform</a> (to send a 101 informational response when upgrading to HTTP/2 or Websocket), <a href="#response_command">response</a>, <a href="#headers_command">headers</a>, <a href="#data_command">data</a> and <a href="#switch_protocol_command">switch_protocol</a>.</p>
+<h2 id="_exports">Exports</h2>
+<p>The following function should be called by modules implementing stream handlers to execute the next stream handler in the list:</p>
+<ul><li><a href="../cowboy_stream.init">cowboy_stream:init(3)</a> - Initialize a stream
+</li>
+<li><a href="../cowboy_stream.data">cowboy_stream:data(3)</a> - Handle data for a stream
+</li>
+<li><a href="../cowboy_stream.info">cowboy_stream:info(3)</a> - Handle a message for a stream
+</li>
+<li><a href="../cowboy_stream.terminate">cowboy_stream:terminate(3)</a> - Terminate a stream
+</li>
+<li><a href="../cowboy_stream.early_error">cowboy_stream:early_error(3)</a> - Handle an early error for a stream
+</li>
+</ul>
+<h2 id="_types">Types</h2>
+<h3 id="_commands">commands()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">commands</font></b>() <font color="#990000">::</font> [<font color="#009900">Command</font>]</tt></pre>
+</div></div>
+<p>See the <a href="#commands">list of commands</a> for details.</p>
+<h3 id="_fin">fin()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">fin</font></b>() <font color="#990000">::</font> <font color="#FF6600">fin</font> | <font color="#FF6600">nofin</font></tt></pre>
+</div></div>
+<p>Used in commands and events to indicate that this is the end of a direction of a stream.</p>
+<h3 id="_partial_req">partial_req()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">req</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">method</font>  <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% case sensitive</font></i>
+    <font color="#0000FF">version</font> <font color="#990000">=&gt;</font> <b><font color="#000000">cowboy:http_version</font></b>() | <b><font color="#000080">atom</font></b>(),
+    <font color="#0000FF">scheme</font>  <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+    <font color="#0000FF">host</font>    <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% lowercase; case insensitive</font></i>
+    <font color="#0000FF">port</font>    <font color="#990000">=&gt;</font> <b><font color="#000000">inet:port_number</font></b>(),
+    <font color="#0000FF">path</font>    <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% case sensitive</font></i>
+    <font color="#0000FF">qs</font>      <font color="#990000">=&gt;</font> <b><font color="#000080">binary</font></b>(),               <i><font color="#9A1900">%% case sensitive</font></i>
+    <font color="#0000FF">headers</font> <font color="#990000">=&gt;</font> <b><font color="#000000">cowboy:http_headers</font></b>(),
+    <font color="#0000FF">peer</font>    <font color="#990000">=&gt;</font> {<b><font color="#000000">inet:ip_address</font></b>(), <b><font color="#000000">inet:port_number</font></b>()}
+}</tt></pre>
+</div></div>
+<p>Partial request information received when an early error is detected.</p>
+<h3 id="_reason">reason()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">reason</font></b>() <font color="#990000">::</font> <b><font color="#000080">normal</font></b> | <font color="#FF6600">switch_protocol</font>
+    | {<font color="#FF6600">internal_error</font>, <font color="#FF6600">timeout</font> | {<font color="#FF6600">error</font> | <b><font color="#000080">exit</font></b> | <b><font color="#000080">throw</font></b>, <b><font color="#000000">any</font></b>()}, <font color="#009900">HumanReadable</font>}
+    | {<font color="#FF6600">socket_error</font>, <font color="#FF6600">closed</font> | <b><font color="#000080">atom</font></b>(), <font color="#009900">HumanReadable</font>}
+    | {<font color="#FF6600">stream_error</font>, <font color="#009900">Error</font>, <font color="#009900">HumanReadable</font>}
+    | {<font color="#FF6600">connection_error</font>, <font color="#009900">Error</font>, <font color="#009900">HumanReadable</font>}
+    | {<font color="#FF6600">stop</font>, <b><font color="#000000">cow_http2:frame</font></b>() | {<b><font color="#000080">exit</font></b>, <b><font color="#000000">any</font></b>()}, <font color="#009900">HumanReadable</font>}
+
+<font color="#009900">Error</font>         <font color="#990000">=</font> <b><font color="#000080">atom</font></b>()
+<font color="#009900">HumanReadable</font> <font color="#990000">=</font> <b><font color="#000080">atom</font></b>()</tt></pre>
+</div></div>
+<p>Reason for the stream termination.</p>
+<h3 id="_resp_command">resp_command()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">resp_command</font></b>() <font color="#990000">::</font> {<font color="#FF6600">response</font>, <b><font color="#000000">cowboy:http_status</font></b>(),
+    <b><font color="#000000">cowboy:http_headers</font></b>(), <b><font color="#000000">cowboy_req:resp_body</font></b>()}</tt></pre>
+</div></div>
+<p>See the <a href="#response_command">response command</a> for details.</p>
+<h3 id="_streamid">streamid()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">streamid</font></b>() <font color="#990000">::</font> <b><font color="#000000">any</font></b>()</tt></pre>
+</div></div>
+<p>The identifier for this stream.</p>
+<p>The identifier is unique over the connection process. It is possible to form a unique identifier node-wide and cluster-wide by wrapping it in a <code>{self(), StreamID}</code> tuple.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.7</strong>: The <code>log</code> and <code>set_options</code> commands were introduced.
+</li>
+<li><strong>2.6</strong>: The <code>data</code> command can now contain a sendfile tuple.
+</li>
+<li><strong>2.6</strong>: The <code>{stop, {exit, any()}, HumanReadable}</code> terminate reason was added.
+</li>
+<li><strong>2.2</strong>: The <code>trailers</code> command was introduced.
+</li>
+<li><strong>2.0</strong>: Module introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_http">cowboy_http(3)</a>, <a href="../cowboy_http2">cowboy_http2(3)</a>, <a href="../cowboy_req.cast">cowboy_req:cast(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_stream_h/index.html b/docs/en/cowboy/2.13/manual/cowboy_stream_h/index.html
new file mode 100644
index 00000000..3d15a226
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_stream_h/index.html
@@ -0,0 +1,213 @@
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+
+<h1 class="lined-header"><span>cowboy_stream_h(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_stream_h - Default stream handler</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_stream_h</code> is Cowboy&apos;s default stream handler and defines much of its behavior. It is responsible for managing the request process, sending it the request body and translating its messages into commands that Cowboy understands.</p>
+<h2 id="_options">Options</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">env</font>              <font color="#990000">=&gt;</font> <b><font color="#000000">cowboy_middleware:env</font></b>(),
+    <font color="#0000FF">middlewares</font>      <font color="#990000">=&gt;</font> [<b><font color="#000000">module</font></b>()],
+    <font color="#000080">shutdown</font><font color="#009900">_timeout</font> <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>()
+}</tt></pre>
+</div></div>
+<p>Configuration for the default stream handler.</p>
+<p>The default value is given next to the option name:</p>
+<dl><dt>env (#{})</dt>
+<dd><p>Middleware environment.</p>
+</dd>
+<dt>middlewares ([cowboy_router, cowboy_handler])</dt>
+<dd><p>Middlewares to run for every request.</p>
+</dd>
+<dt>shutdown_timeout (5000)</dt>
+<dd><p>Time in ms Cowboy will wait for child processes to shut down before killing them.</p>
+</dd>
+</dl>
+<h2 id="_events">Events</h2>
+<p>The default stream handler spawns the request process and receives its exit signal when it terminates. It will stop the stream once its receives it.</p>
+<p>Because this stream handler converts events from the request process into commands, other stream handlers may not work properly if they are executed after the default stream handler. Always be mindful of in which order stream handlers will get executed.</p>
+<h3 id="_request_body">Request body</h3>
+<p>The default stream handler implements the <code>read_body</code> mechanism. In addition to reading the body, the handler will automatically handle the <code>expect: 100-continue</code> header and send a 100 Continue response.</p>
+<p>Normally one would use <a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> to read the request body. The default stream handler will buffer data until the amount gets larger than the requested length before sending it. Alternatively, it will send whatever data it has when the period timeout triggers. Depending on the protocol, the flow control window is updated to allow receiving data for the requested length.</p>
+<p>The default stream handler also comes with an automatic mode for reading the request body. This can be used by sending the event message <code>{read_body, Pid, Ref, auto, infinity}</code> using <a href="../cowboy_req.cast">cowboy_req:cast(3)</a>. The default stream handler will then send data as soon as some becomes available using one of these two messages depending on whether body reading was completed:</p>
+<ul><li><code>{request_body, Ref, nofin, Data}</code>
+</li>
+<li><code>{request_body, Ref, fin, BodyLen, Data}</code>
+</li>
+</ul>
+<p>Depending on the protocol, Cowboy will update the flow control window using the size of the data that was read.</p>
+<p>Auto mode automatically gets disabled after data has been sent to the handler. Therefore in order to continue reading data a <code>read_body</code> event message must be sent after each <code>request_body</code> message.</p>
+<h3 id="_response">Response</h3>
+<p>In addition it returns a command for any event message looking like one of the following commands: <code>inform</code>, <code>response</code>, <code>headers</code>, <code>data</code>, <code>trailers</code>, <code>push</code>, <code>switch_protocol</code>. This is what allows the request process to send a response.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.11</strong>: Introduce body reading using auto mode.
+</li>
+<li><strong>2.0</strong>: Module introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_compress_h">cowboy_compress_h(3)</a>, <a href="../cowboy_decompress_h">cowboy_decompress_h(3)</a>, <a href="../cowboy_metrics_h">cowboy_metrics_h(3)</a>, <a href="../cowboy_tracer_h">cowboy_tracer_h(3)</a>, <a href="../cowboy_req.cast">cowboy_req:cast(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_tracer_h/index.html b/docs/en/cowboy/2.13/manual/cowboy_tracer_h/index.html
new file mode 100644
index 00000000..304fc91d
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_tracer_h/index.html
@@ -0,0 +1,215 @@
+<!DOCTYPE html>
+<html lang="en">
+
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+<h1 class="lined-header"><span>cowboy_tracer_h(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_tracer_h - Tracer stream handler</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_tracer_h</code> can be used to conditionally trace streams based on information found in the request. Trace messages are given to the configured callback.</p>
+<h2 id="_options">Options</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">tracer_callback</font>    <font color="#990000">=&gt;</font> <font color="#009900">Callback</font>,
+    <font color="#0000FF">tracer_flags</font>       <font color="#990000">=&gt;</font> [<b><font color="#000080">atom</font></b>()],
+    <font color="#0000FF">tracer_match_specs</font> <font color="#990000">=&gt;</font> [<font color="#009900">MatchSpec</font>]
+}
+
+<font color="#009900">Callback</font> <font color="#990000">::</font> <b><font color="#0000FF">fun</font></b>((<font color="#FF6600">init</font> | <font color="#FF6600">terminate</font> | <b><font color="#000000">tuple</font></b>(), <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <font color="#009900">State</font>)
+
+<font color="#009900">MatchSpec</font> <font color="#990000">::</font> <font color="#009900">MatchPredicate</font>
+           | {<font color="#FF6600">method</font>, <b><font color="#000080">binary</font></b>()}
+           | {<font color="#FF6600">host</font>, <b><font color="#000080">binary</font></b>()}
+           | {<font color="#FF6600">path</font>, <b><font color="#000080">binary</font></b>()}
+           | {<font color="#FF6600">path_start</font>, <b><font color="#000080">binary</font></b>()}
+           | {<font color="#FF6600">header</font>, <b><font color="#000080">binary</font></b>()}
+           | {<font color="#FF6600">header</font>, <b><font color="#000080">binary</font></b>(), <b><font color="#000080">binary</font></b>()}
+           | {<font color="#FF6600">peer_ip</font>, <b><font color="#000000">inet:ip_address</font></b>()}
+
+<font color="#009900">MatchPredicate</font> <font color="#990000">::</font> <b><font color="#0000FF">fun</font></b>((<b><font color="#000000">cowboy_stream:streamid</font></b>(),
+                       <b><font color="#000000">cowboy_req:req</font></b>(),
+                       <b><font color="#000000">cowboy:opts</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">boolean</font></b>())
+}</tt></pre>
+</div></div>
+<p>Configuration for the tracer stream handler.</p>
+<p>This module will not set trace patterns. Those must be set by the user directly, either from the callback&apos;s <code>init</code> or, preferably, in advance.</p>
+<dl><dt>tracer_callback</dt>
+<dd><p>The function that will be called for each trace events. It will also be called before any trace event with an argument <code>init</code>, and when the stream is terminated with an argument <code>terminate</code>.</p>
+<p>This option is required for tracing to be enabled. The tracer stream handler does nothing otherwise.</p>
+</dd>
+<dt>tracer_flags</dt>
+<dd><p>Trace flags to enable. See the documentation of <code>erlang:trace/3</code> for details. Note that all trace flags are allowed except for the <code>tracer</code> flag.</p>
+</dd>
+<dt>tracer_match_specs</dt>
+<dd><p>A list of match conditions that must all be fulfilled for the stream to be traced. Cowboy will compare these with the information found in the request and only enable tracing if all matches succeed.</p>
+<p>This option is required for tracing to be enabled. The tracer stream handler does nothing otherwise.</p>
+</dd>
+</dl>
+<h2 id="_events">Events</h2>
+<p>The tracer stream handler does not produce any event.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.7</strong>: Module introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_stream">cowboy_stream(3)</a>, <a href="../cowboy_compress_h">cowboy_compress_h(3)</a>, <a href="../cowboy_decompress_h">cowboy_decompress_h(3)</a>, <a href="../cowboy_metrics_h">cowboy_metrics_h(3)</a>, <a href="../cowboy_stream_h">cowboy_stream_h(3)</a></p>
+
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+	2.13
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diff --git a/docs/en/cowboy/2.13/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.13/manual/cowboy_websocket/index.html
new file mode 100644
index 00000000..460673b3
--- /dev/null
+++ b/docs/en/cowboy/2.13/manual/cowboy_websocket/index.html
@@ -0,0 +1,380 @@
+<!DOCTYPE html>
+<html lang="en">
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+
+<h1 class="lined-header"><span>cowboy_websocket(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy_websocket - Websocket</p>
+<h2 id="_description">Description</h2>
+<p>The module <code>cowboy_websocket</code> implements Websocket as a Ranch protocol. It also defines a callback interface for handling Websocket connections.</p>
+<h2 id="_callbacks">Callbacks</h2>
+<p>Websocket handlers must implement the following callback interface:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>)
+    <font color="#990000">-&gt;</font> {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>}
+     | {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#009900">Opts</font>}
+
+<b><font color="#000000">websocket_init</font></b>(<font color="#009900">State</font>)            <font color="#990000">-&gt;</font> <font color="#009900">CallResult</font>  <i><font color="#9A1900">%% optional</font></i>
+<b><font color="#000000">websocket_handle</font></b>(<font color="#009900">InFrame</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <font color="#009900">CallResult</font>
+<b><font color="#000000">websocket_info</font></b>(<font color="#009900">Info</font>, <font color="#009900">State</font>)      <font color="#990000">-&gt;</font> <font color="#009900">CallResult</font>
+
+<b><font color="#000000">terminate</font></b>(<font color="#009900">Reason</font>, <font color="#009900">PartialReq</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>      <i><font color="#9A1900">%% optional</font></i>
+
+<font color="#009900">Req</font>        <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>()
+<font color="#009900">PartialReq</font> <font color="#990000">::</font> <b><font color="#000000">map</font></b>()
+<font color="#009900">State</font>      <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+<font color="#009900">Opts</font>       <font color="#990000">::</font> <b><font color="#000000">cowboy_websocket:opts</font></b>()
+<font color="#009900">InFrame</font>    <font color="#990000">::</font> <font color="#FF6600">ping</font> | <font color="#FF6600">pong</font> | {<font color="#FF6600">text</font> | <b><font color="#000080">binary</font></b> | <font color="#FF6600">ping</font> | <font color="#FF6600">pong</font>, <b><font color="#000080">binary</font></b>()}
+<font color="#009900">Info</font>       <font color="#990000">::</font> <b><font color="#000000">any</font></b>()
+
+<font color="#009900">CallResult</font> <font color="#990000">::</font> {<b><font color="#000000">commands</font></b>(), <font color="#009900">State</font>}
+            | {<b><font color="#000000">commands</font></b>(), <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}
+            | <font color="#009900">Deprecated</font>
+
+<font color="#009900">Deprecated</font> <font color="#990000">::</font> {<font color="#FF6600">ok</font>, <font color="#009900">State</font>}
+            | {<font color="#FF6600">ok</font>, <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}
+            | {<font color="#FF6600">reply</font>, <font color="#009900">OutFrame</font> | [<font color="#009900">OutFrame</font>], <font color="#009900">State</font>}
+            | {<font color="#FF6600">reply</font>, <font color="#009900">OutFrame</font> | [<font color="#009900">OutFrame</font>], <font color="#009900">State</font>, <font color="#FF6600">hibernate</font>}
+            | {<font color="#FF6600">stop</font>, <font color="#009900">State</font>}
+<font color="#009900">OutFrame</font>   <font color="#990000">::</font> <b><font color="#000000">cow_ws:frame</font></b>()                    <i><font color="#9A1900">%% see types below</font></i>
+
+<font color="#009900">Reason</font>     <font color="#990000">::</font> <b><font color="#000080">normal</font></b> | <font color="#FF6600">stop</font> | <font color="#FF6600">timeout</font>
+            | <font color="#FF6600">remote</font> | {<font color="#FF6600">remote</font>, <b><font color="#000000">cow_ws:close_code</font></b>(), <b><font color="#000080">binary</font></b>()}
+            | {<font color="#FF6600">error</font>, <font color="#FF6600">badencoding</font> | <font color="#FF6600">badframe</font> | <font color="#FF6600">closed</font> | <b><font color="#000080">atom</font></b>()}
+            | {<font color="#FF6600">crash</font>, <font color="#FF6600">error</font> | <b><font color="#000080">exit</font></b> | <b><font color="#000080">throw</font></b>, <b><font color="#000000">any</font></b>()}</tt></pre>
+</div></div>
+<p>The <code>init/2</code> callback is common to all handlers. To upgrade the connection to Websocket, it must return <code>cowboy_websocket</code> as the first element of the tuple.</p>
+<p>Any operation requiring the HTTP request must be done in the <code>init/2</code> function, as the Req object will not be available after it returns. Websocket sub-protocol selection should therefore be done in this function.</p>
+<p>The optional <code>websocket_init/1</code> callback will be called once the connection has been upgraded to Websocket. It can be used to perform any required initialization of the handler.</p>
+<p>Note that the <code>init/2</code> function does not run in the same process as the Websocket callbacks. Any Websocket-specific initialization must be done in <code>websocket_init/1</code>.</p>
+<p>The <code>websocket_handle/2</code> callback will be called for every frame received. The <code>websocket_info/2</code> callback will be called for every Erlang message received.</p>
+<p>All three Websocket callbacks may send one or more frames back to the client, including close frames to terminate the connection; enable/disable active mode; enable/disable compression for subsequent frames; or change Websocket options.</p>
+<p>The optional <code>terminate/3</code> callback will ultimately be called with the reason for the termination of the connection. This callback is common to all handlers. Note that Websocket will not provide the full Req object by default, to save memory.</p>
+<p>Cowboy will terminate the process right after closing the Websocket connection. This means that there is no need to perform any cleanup in the <code>terminate/3</code> callback.</p>
+<p>The following terminate reasons are defined for Websocket connections:</p>
+<dl><dt>normal</dt>
+<dd><p>The connection was closed normally before establishing a Websocket connection. This typically happens if an <code>ok</code> tuple is returned from the <code>init/2</code> callback.</p>
+</dd>
+<dt>remote</dt>
+<dd><p>The remote endpoint closed the connection without giving any further details.</p>
+</dd>
+<dt>{remote, Code, Payload}</dt>
+<dd><p>The remote endpoint closed the connection with the given <code>Code</code> and <code>Payload</code> as the reason.</p>
+</dd>
+<dt>stop</dt>
+<dd><p>The handler requested to close the connection, either by returning a <code>stop</code> tuple or by sending a <code>close</code> frame.</p>
+</dd>
+<dt>timeout</dt>
+<dd><p>The connection has been closed due to inactivity. The timeout value can be configured from <code>init/2</code>.</p>
+</dd>
+<dt>{crash, Class, Reason}</dt>
+<dd><p>A crash occurred in the handler. <code>Class</code> and <code>Reason</code> can be used to obtain more information about the crash.</p>
+</dd>
+<dt>{error, badencoding}</dt>
+<dd><p>A text frame was sent by the client with invalid encoding. All text frames must be valid UTF-8.</p>
+</dd>
+<dt>{error, badframe}</dt>
+<dd><p>A protocol error has been detected.</p>
+</dd>
+<dt>{error, closed}</dt>
+<dd><p>The socket has been closed brutally without a close frame being received first.</p>
+</dd>
+<dt>{error, Reason}</dt>
+<dd><p>A socket error occurred.</p>
+</dd>
+</dl>
+<h2 id="_types">Types</h2>
+<h3 id="_commands">commands()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">commands</font></b>() <font color="#990000">::</font> [<font color="#009900">Command</font>]
+
+<font color="#009900">Command</font> <font color="#990000">::</font> {<font color="#FF6600">active</font>, <b><font color="#000000">boolean</font></b>()}
+         | {<font color="#FF6600">deflate</font>, <b><font color="#000000">boolean</font></b>()}
+         | {<font color="#FF6600">set_options</font>, #{
+             <font color="#0000FF">idle_timeout</font> <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+             <font color="#0000FF">max_frame_size</font> <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>() | <font color="#FF6600">infinity</font>}}
+         | {<font color="#000080">shutdown</font><font color="#009900">_reason</font>, <b><font color="#000000">any</font></b>()}
+         | <font color="#009900">Frame</font> <font color="#990000">::</font> <b><font color="#000000">cow_ws:frame</font></b>()</tt></pre>
+</div></div>
+<p>Commands that may be returned from Websocket callbacks.</p>
+<p>The following commands are defined:</p>
+<dl><dt>active</dt>
+<dd><p>Whether to disable or enable reading from the socket. This can be used to apply flow control to a Websocket connection.</p>
+</dd>
+<dt>deflate</dt>
+<dd><p>Whether the subsequent frames should be compressed. Has no effect on connections that did not negotiate compression.</p>
+</dd>
+<dt>set_options</dt>
+<dd><p>Set Websocket options. Currently only the options <code>idle_timeout</code> and <code>max_frame_size</code> may be updated from a Websocket handler.</p>
+</dd>
+<dt>shutdown_reason</dt>
+<dd><p>Change the shutdown reason. The Websocket process will exit with reason <code>normal</code> by default. This command can be used to exit with reason <code>{shutdown, ShutdownReason}</code> under normal conditions. This command has no effect when the Websocket process exits abnormally, for example following a crash in a handler callback.</p>
+</dd>
+<dt>Frame</dt>
+<dd><p>Send the corresponding Websocket frame.</p>
+</dd>
+</dl>
+<h3 id="_cow_ws_frame">cow_ws:frame()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">frame</font></b>() <font color="#990000">::</font> {<font color="#FF6600">text</font>, <b><font color="#000000">iodata</font></b>()}
+    | {<b><font color="#000080">binary</font></b>, <b><font color="#000000">iodata</font></b>()}
+    | <font color="#FF6600">ping</font> | {<font color="#FF6600">ping</font>, <b><font color="#000000">iodata</font></b>()}
+    | <font color="#FF6600">pong</font> | {<font color="#FF6600">pong</font>, <b><font color="#000000">iodata</font></b>()}
+    | <font color="#FF6600">close</font> | {<font color="#FF6600">close</font>, <b><font color="#000000">iodata</font></b>()} | {<font color="#FF6600">close</font>, <b><font color="#000000">close_code</font></b>(), <b><font color="#000000">iodata</font></b>()}
+
+<b><font color="#000000">close_code</font></b>() <font color="#990000">::</font> <font color="#993399">1000</font><font color="#990000">..</font><font color="#993399">1003</font> | <font color="#993399">1006</font><font color="#990000">..</font><font color="#993399">1011</font> | <font color="#993399">3000</font><font color="#990000">..</font><font color="#993399">4999</font></tt></pre>
+</div></div>
+<p>Websocket frames that can be sent as a response.</p>
+<p>Note that there is no need to send pong frames back as Cowboy does it automatically for you.</p>
+<h3 id="_opts">opts()</h3>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">opts</font></b>() <font color="#990000">::</font> #{
+    <font color="#0000FF">active_n</font>       <font color="#990000">=&gt;</font> <b><font color="#000000">pos_integer</font></b>(),
+    <font color="#0000FF">compress</font>       <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>(),
+    <font color="#0000FF">deflate_opts</font>   <font color="#990000">=&gt;</font> <b><font color="#000000">cow_ws:deflate_opts</font></b>()
+    <font color="#0000FF">dynamic_buffer</font> <font color="#990000">=&gt;</font> <font color="#000080">false</font> | {<b><font color="#000000">pos_integer</font></b>(), <b><font color="#000000">pos_integer</font></b>()},
+    <font color="#0000FF">idle_timeout</font>   <font color="#990000">=&gt;</font> <b><font color="#000000">timeout</font></b>(),
+    <font color="#0000FF">max_frame_size</font> <font color="#990000">=&gt;</font> <b><font color="#000000">non_neg_integer</font></b>() | <font color="#FF6600">infinity</font>,
+    <font color="#0000FF">req_filter</font>     <font color="#990000">=&gt;</font> <b><font color="#0000FF">fun</font></b>((<b><font color="#000000">cowboy_req:req</font></b>()) <font color="#990000">-&gt;</font> <b><font color="#000000">map</font></b>()),
+    <font color="#0000FF">validate_utf8</font>  <font color="#990000">=&gt;</font> <b><font color="#000000">boolean</font></b>()
+}</tt></pre>
+</div></div>
+<p>Websocket handler options.</p>
+<p>This configuration is passed to Cowboy from the <code>init/2</code> function:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">init</font></b>(<font color="#009900">Req</font>, <font color="#009900">State</font>) <font color="#990000">-&gt;</font>
+    <font color="#009900">Opts</font> <font color="#990000">=</font> #{<font color="#0000FF">compress</font> <font color="#990000">=&gt;</font> <font color="#000080">true</font>},
+    {<font color="#FF6600">cowboy_websocket</font>, <font color="#009900">Req</font>, <font color="#009900">State</font>, <font color="#009900">Opts</font>}<font color="#990000">.</font></tt></pre>
+</div></div>
+<p>The default value is given next to the option name:</p>
+<dl><dt>active_n (1)</dt>
+<dd><p>The number of packets Cowboy will request from the socket at once. This can be used to tweak the performance of the server. Higher values reduce the number of times Cowboy need to request more packets from the port driver at the expense of potentially higher memory being used.</p>
+<p>This option does not apply to Websocket over HTTP/2.</p>
+</dd>
+<dt>compress (false)</dt>
+<dd><p>Whether to enable the Websocket frame compression extension. Frames will only be compressed for the clients that support this extension.</p>
+</dd>
+<dt>deflate_opts (#{})</dt>
+<dd><p>Configuration for the permessage-deflate Websocket extension. Allows configuring both the negotiated options and the zlib compression options. The defaults optimize the compression at the expense of some memory and CPU.</p>
+</dd>
+<dt>dynamic_buffer ({1024, 131072})</dt>
+<dd><p>Cowboy will dynamically change the socket&apos;s <code>buffer</code> size depending on the size of the data it receives from the socket. This lets Cowboy use the optimal buffer size for the current workload.</p>
+<p>The dynamic buffer size functionality can be disabled by setting this option to <code>false</code>. Cowboy will also disable it by default when the <code>buffer</code> transport option is configured.</p>
+</dd>
+<dt>idle_timeout (60000)</dt>
+<dd><p>Time in milliseconds that Cowboy will keep the connection open without receiving anything from the client.</p>
+<p>This option can be updated at any time using the <code>set_options</code> command.</p>
+</dd>
+<dt>max_frame_size (infinity)</dt>
+<dd><p>Maximum frame size in bytes allowed by this Websocket handler. Cowboy will close the connection when a client attempts to send a frame that goes over this limit. For fragmented frames this applies to the size of the reconstituted frame.</p>
+</dd>
+<dt>req_filter</dt>
+<dd><p>A function applied to the Req to compact it and only keep required information. The Req is only given back in the <code>terminate/3</code> callback. By default it keeps the method, version, URI components and peer information.</p>
+</dd>
+<dt>validate_utf8 (true)</dt>
+<dd><p>Whether Cowboy should verify that the payload of <code>text</code> and <code>close</code> frames is valid UTF-8. This is required by the protocol specification but in some cases it may be more interesting to disable it in order to save resources.</p>
+<p>Note that <code>binary</code> frames do not have this UTF-8 requirement and are what should be used under normal circumstances if necessary.</p>
+</dd>
+</dl>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.13</strong>: The <code>active_n</code> default value was changed to <code>1</code>.
+</li>
+<li><strong>2.13</strong>: The <code>dynamic_buffer</code> option was added.
+</li>
+<li><strong>2.13</strong>: The <code>max_frame_size</code> option can now be set dynamically.
+</li>
+<li><strong>2.11</strong>: Websocket over HTTP/2 is now considered stable.
+</li>
+<li><strong>2.11</strong>: HTTP/1.1 Websocket no longer traps exits by default.
+</li>
+<li><strong>2.8</strong>: The <code>active_n</code> option was added.
+</li>
+<li><strong>2.7</strong>: The commands based interface has been documented. The old interface is now deprecated.
+</li>
+<li><strong>2.7</strong>: The command <code>shutdown_reason</code> was introduced.
+</li>
+<li><strong>2.7</strong>: The option <code>validate_utf8</code> has been added.
+</li>
+<li><strong>2.6</strong>: Deflate options can now be configured via <code>deflate_opts</code>.
+</li>
+<li><strong>2.0</strong>: The Req object is no longer passed to Websocket callbacks.
+</li>
+<li><strong>2.0</strong>: The callback <code>websocket_terminate/3</code> was removed in favor of <code>terminate/3</code>.
+</li>
+<li><strong>1.0</strong>: Protocol introduced.
+</li>
+</ul>
+<h2 id="_see_also">See also</h2>
+<p><a href="..">cowboy(7)</a>, <a href="../cowboy_handler">cowboy_handler(3)</a>, <a href="../cowboy_http">cowboy_http(3)</a>, <a href="../cowboy_http2">cowboy_http2(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
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+	
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+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
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diff --git a/docs/en/cowboy/2.13/manual/http_status_codes/index.html b/docs/en/cowboy/2.13/manual/http_status_codes/index.html
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+
+<h1 class="lined-header"><span>HTTP status codes(7)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>HTTP status codes - status codes used by Cowboy</p>
+<h2 id="_description">Description</h2>
+<p>This chapter aims to list all HTTP status codes that Cowboy may return, with details on the reasons why. The list given here only includes the replies that Cowboy sends, not user replies.</p>
+<h2 id="_100_continue">100 Continue</h2>
+<p>When the client sends an <code>expect: 100-continue</code> header, Cowboy automatically sends a this status code before trying to read the request body. This behavior can be disabled using the appropriate body option.</p>
+<h2 id="_101_switching_protocols">101 Switching Protocols</h2>
+<p>This is the status code sent when switching to the Websocket protocol.</p>
+<h2 id="_200_ok">200 OK</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_201_created">201 Created</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_202_accepted">202 Accepted</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_204_no_content">204 No Content</h2>
+<p>This status code is sent when the processing of a request ends without any reply having been sent. It may also be sent by <code>cowboy_rest</code> under normal conditions.</p>
+<h2 id="_300_multiple_choices">300 Multiple Choices</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_301_moved_permanently">301 Moved Permanently</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_303_see_other">303 See Other</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_304_not_modified">304 Not Modified</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_307_temporary_redirect">307 Temporary Redirect</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_400_bad_request">400 Bad Request</h2>
+<p>Cowboy will send this status code for any of the following reasons:</p>
+<ul><li>Too many empty lines were sent before the request.
+</li>
+<li>The request-line could not be parsed.
+</li>
+<li>Too many headers were sent.
+</li>
+<li>A header name was too long.
+</li>
+<li>A header value was too long.
+</li>
+<li>The host header was missing from an HTTP/1.1 request.
+</li>
+<li>The host header could not be parsed.
+</li>
+<li>The requested host was not found.
+</li>
+<li>The requested path could not be parsed.
+</li>
+<li>The accept header could not be parsed when using REST.
+</li>
+<li>REST under normal conditions.
+</li>
+<li>A Websocket upgrade failed.
+</li>
+</ul>
+<h2 id="_401_unauthorized">401 Unauthorized</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_403_forbidden">403 Forbidden</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_404_not_found">404 Not Found</h2>
+<p>This status code is sent when the router successfully resolved the host but didn&apos;t find a matching path for the request. It may also be sent by <code>cowboy_rest</code> under normal conditions.</p>
+<h2 id="_405_method_not_allowed">405 Method Not Allowed</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_406_not_acceptable">406 Not Acceptable</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_408_request_timeout">408 Request Timeout</h2>
+<p>Cowboy will send this status code to the client if the client started to send a request, indicated by the request-line being received fully, but failed to send all headers in a reasonable time.</p>
+<h2 id="_409_conflict">409 Conflict</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_410_gone">410 Gone</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_412_precondition_failed">412 Precondition Failed</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_413_request_entity_too_large">413 Request Entity Too Large</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_414_request_uri_too_long">414 Request-URI Too Long</h2>
+<p>Cowboy will send this status code to the client if the request-line is too long. It may also be sent by <code>cowboy_rest</code> under normal conditions.</p>
+<h2 id="_415_unsupported_media_type">415 Unsupported Media Type</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_500_internal_server_error">500 Internal Server Error</h2>
+<p>This status code is sent when a crash occurs in HTTP, loop or REST handlers, or when an invalid return value is returned. It may also be sent by <code>cowboy_rest</code> under normal conditions.</p>
+<h2 id="_501_not_implemented">501 Not Implemented</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_503_service_unavailable">503 Service Unavailable</h2>
+<p>This status code is sent by <code>cowboy_rest</code>.</p>
+<h2 id="_505_http_version_not_supported">505 HTTP Version Not Supported</h2>
+<p>Cowboy only supports the versions 1.0 and 1.1 of HTTP. In all other cases this status code is sent back to the client and the connection is closed.</p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
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@@ -0,0 +1,244 @@
+<!DOCTYPE html>
+<html lang="en">
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+    <title>Nine Nines: Cowboy Function Reference</title>
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+<div id="contents" class="two_col">
+<div class="container">
+<div class="row">
+<div id="docs" class="span9 maincol">
+
+<h1 class="lined-header"><span>Cowboy Function Reference</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>cowboy - Small, fast, modern HTTP server for Erlang/OTP</p>
+<h2 id="_description">Description</h2>
+<p>Cowboy is an HTTP server for Erlang/OTP with support for the HTTP/1.1, HTTP/2 and Websocket protocols.</p>
+<p>Cowboy aims to provide a complete HTTP stack. This includes the implementation of the HTTP RFCs but also any directly related standards, like Websocket or Server-Sent Events.</p>
+<h2 id="_modules">Modules</h2>
+<p>Functions:</p>
+<ul><li><a href="cowboy">cowboy(3)</a> - Listener management
+</li>
+<li><a href="cowboy_req">cowboy_req(3)</a> - Request and response
+</li>
+<li><a href="cowboy_router">cowboy_router(3)</a> - Router
+</li>
+<li><a href="cowboy_constraints">cowboy_constraints(3)</a> - Constraints
+</li>
+</ul>
+<p>Protocols:</p>
+<ul><li><a href="cowboy_http">cowboy_http(3)</a> - HTTP/1.1
+</li>
+<li><a href="cowboy_http2">cowboy_http2(3)</a> - HTTP/2
+</li>
+<li><a href="cowboy_websocket">cowboy_websocket(3)</a> - Websocket
+</li>
+</ul>
+<p>Handlers:</p>
+<ul><li><a href="cowboy_static">cowboy_static(3)</a> - Static file handler
+</li>
+</ul>
+<p>Stream handlers:</p>
+<ul><li><a href="cowboy_stream_h">cowboy_stream_h(3)</a> - Default stream handler
+</li>
+<li><a href="cowboy_compress_h">cowboy_compress_h(3)</a> - Compress stream handler
+</li>
+<li><a href="cowboy_decompress_h">cowboy_decompress_h(3)</a> - Decompress stream handler
+</li>
+<li><a href="cowboy_metrics_h">cowboy_metrics_h(3)</a> - Metrics stream handler
+</li>
+<li><a href="cowboy_tracer_h">cowboy_tracer_h(3)</a> - Tracer stream handler
+</li>
+</ul>
+<p>Behaviors:</p>
+<ul><li><a href="cowboy_handler">cowboy_handler(3)</a> - Plain HTTP handlers
+</li>
+<li><a href="cowboy_loop">cowboy_loop(3)</a> - Loop handlers
+</li>
+<li><a href="cowboy_middleware">cowboy_middleware(3)</a> - Middlewares
+</li>
+<li><a href="cowboy_rest">cowboy_rest(3)</a> - REST handlers
+</li>
+<li><a href="cowboy_stream">cowboy_stream(3)</a> - Stream handlers
+</li>
+<li><a href="cowboy_websocket">cowboy_websocket(3)</a> - Websocket handlers
+</li>
+</ul>
+<p>Middlewares:</p>
+<ul><li><a href="cowboy_router">cowboy_router(3)</a> - Router middleware
+</li>
+<li><a href="cowboy_handler">cowboy_handler(3)</a> - Handler middleware
+</li>
+</ul>
+<!-- @todo http_status_codes is not linked to; what to do with it?-->
+<h2 id="_dependencies">Dependencies</h2>
+<ul><li><a href="ranch_app">ranch(7)</a> - Socket acceptor pool for TCP protocols
+</li>
+<li><a href="cowlib_app">cowlib(7)</a> - Support library for manipulating Web protocols
+</li>
+<li>ssl - Secure communication over sockets
+</li>
+<li>crypto - Crypto functions
+</li>
+</ul>
+<p>All these applications must be started before the <code>cowboy</code> application. To start Cowboy and all dependencies at once:</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">application:ensure_all_started</font></b>(<font color="#FF6600">cowboy</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_environment">Environment</h2>
+<p>The <code>cowboy</code> application does not define any application environment configuration parameters.</p>
+<h2 id="_see_also">See also</h2>
+<p><a href="ranch_app">ranch(7)</a>, <a href="cowlib_app">cowlib(7)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+	Cowboy
+	2.13
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.13/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
+	
+</ul>
+
+<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
+<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
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+<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
+</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
+
+
+
+</div>
+</div>
+</div>
+</div>
+
+      <footer>
+        <div class="container">
+          <div class="row">
+            <div class="span6">
+              <p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
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+                </ul>
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+
+
diff --git a/docs/en/cowboy/2.6/guide/constraints/index.html b/docs/en/cowboy/2.6/guide/constraints/index.html
index a6b50531..4b05d286 100644
--- a/docs/en/cowboy/2.6/guide/constraints/index.html
+++ b/docs/en/cowboy/2.6/guide/constraints/index.html
@@ -197,6 +197,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.6/guide/cookies/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.6/guide/erlang_web/index.html
@@ -163,6 +163,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.6/guide/flow_diagram/index.html
@@ -141,6 +141,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/getting_started/index.html b/docs/en/cowboy/2.6/guide/getting_started/index.html
index ed3bca94..13d8c55a 100644
--- a/docs/en/cowboy/2.6/guide/getting_started/index.html
+++ b/docs/en/cowboy/2.6/guide/getting_started/index.html
@@ -215,6 +215,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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index 8f6edc59..defc583f 100644
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+++ b/docs/en/cowboy/2.6/guide/handlers/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.6/guide/index.html b/docs/en/cowboy/2.6/guide/index.html
index 543f3ce9..a4c17dfd 100644
--- a/docs/en/cowboy/2.6/guide/index.html
+++ b/docs/en/cowboy/2.6/guide/index.html
@@ -182,6 +182,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/introduction/index.html b/docs/en/cowboy/2.6/guide/introduction/index.html
index ee12befc..1d3edae6 100644
--- a/docs/en/cowboy/2.6/guide/introduction/index.html
+++ b/docs/en/cowboy/2.6/guide/introduction/index.html
@@ -151,6 +151,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/listeners/index.html b/docs/en/cowboy/2.6/guide/listeners/index.html
index 395bc4ee..69a83311 100644
--- a/docs/en/cowboy/2.6/guide/listeners/index.html
+++ b/docs/en/cowboy/2.6/guide/listeners/index.html
@@ -172,6 +172,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.6/guide/loop_handlers/index.html b/docs/en/cowboy/2.6/guide/loop_handlers/index.html
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+++ b/docs/en/cowboy/2.6/guide/loop_handlers/index.html
@@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.6/guide/middlewares/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/migrating_from_1.0/index.html b/docs/en/cowboy/2.6/guide/migrating_from_1.0/index.html
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+++ b/docs/en/cowboy/2.6/guide/migrating_from_1.0/index.html
@@ -231,6 +231,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/migrating_from_2.0/index.html b/docs/en/cowboy/2.6/guide/migrating_from_2.0/index.html
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+++ b/docs/en/cowboy/2.6/guide/migrating_from_2.0/index.html
@@ -166,6 +166,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/migrating_from_2.1/index.html b/docs/en/cowboy/2.6/guide/migrating_from_2.1/index.html
index bb6df49c..c2cb6646 100644
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+++ b/docs/en/cowboy/2.6/guide/migrating_from_2.1/index.html
@@ -177,6 +177,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.6/guide/migrating_from_2.2/index.html b/docs/en/cowboy/2.6/guide/migrating_from_2.2/index.html
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+++ b/docs/en/cowboy/2.6/guide/migrating_from_2.2/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.6/guide/migrating_from_2.3/index.html b/docs/en/cowboy/2.6/guide/migrating_from_2.3/index.html
index d9dc734f..30947ae0 100644
--- a/docs/en/cowboy/2.6/guide/migrating_from_2.3/index.html
+++ b/docs/en/cowboy/2.6/guide/migrating_from_2.3/index.html
@@ -151,6 +151,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/migrating_from_2.4/index.html b/docs/en/cowboy/2.6/guide/migrating_from_2.4/index.html
index 31ef3b08..dadd1474 100644
--- a/docs/en/cowboy/2.6/guide/migrating_from_2.4/index.html
+++ b/docs/en/cowboy/2.6/guide/migrating_from_2.4/index.html
@@ -179,6 +179,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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index 00c57071..30424919 100644
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+++ b/docs/en/cowboy/2.6/guide/migrating_from_2.5/index.html
@@ -194,6 +194,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.6/guide/migrating_from_2.6/index.html b/docs/en/cowboy/2.6/guide/migrating_from_2.6/index.html
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+++ b/docs/en/cowboy/2.6/guide/migrating_from_2.6/index.html
@@ -131,6 +131,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.6/guide/modern_web/index.html b/docs/en/cowboy/2.6/guide/modern_web/index.html
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+++ b/docs/en/cowboy/2.6/guide/modern_web/index.html
@@ -145,6 +145,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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index 1c8d54dd..f843268a 100644
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+++ b/docs/en/cowboy/2.6/guide/multipart/index.html
@@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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--- a/docs/en/cowboy/2.6/guide/req/index.html
+++ b/docs/en/cowboy/2.6/guide/req/index.html
@@ -393,6 +393,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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--- a/docs/en/cowboy/2.6/guide/req_body/index.html
+++ b/docs/en/cowboy/2.6/guide/req_body/index.html
@@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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index 66cf92e9..3eafdd80 100644
--- a/docs/en/cowboy/2.6/guide/resource_design/index.html
+++ b/docs/en/cowboy/2.6/guide/resource_design/index.html
@@ -178,6 +178,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.6/guide/resp/index.html b/docs/en/cowboy/2.6/guide/resp/index.html
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--- a/docs/en/cowboy/2.6/guide/resp/index.html
+++ b/docs/en/cowboy/2.6/guide/resp/index.html
@@ -360,6 +360,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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diff --git a/docs/en/cowboy/2.6/guide/rest_flowcharts/index.html b/docs/en/cowboy/2.6/guide/rest_flowcharts/index.html
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+++ b/docs/en/cowboy/2.6/guide/rest_flowcharts/index.html
@@ -175,6 +175,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/rest_handlers/index.html b/docs/en/cowboy/2.6/guide/rest_handlers/index.html
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+++ b/docs/en/cowboy/2.6/guide/rest_handlers/index.html
@@ -276,6 +276,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/rest_principles/index.html b/docs/en/cowboy/2.6/guide/rest_principles/index.html
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--- a/docs/en/cowboy/2.6/guide/rest_principles/index.html
+++ b/docs/en/cowboy/2.6/guide/rest_principles/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/routing/index.html b/docs/en/cowboy/2.6/guide/routing/index.html
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+++ b/docs/en/cowboy/2.6/guide/routing/index.html
@@ -299,6 +299,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/specs/index.html b/docs/en/cowboy/2.6/guide/specs/index.html
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--- a/docs/en/cowboy/2.6/guide/specs/index.html
+++ b/docs/en/cowboy/2.6/guide/specs/index.html
@@ -466,6 +466,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/static_files/index.html b/docs/en/cowboy/2.6/guide/static_files/index.html
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+++ b/docs/en/cowboy/2.6/guide/static_files/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/streams/index.html b/docs/en/cowboy/2.6/guide/streams/index.html
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--- a/docs/en/cowboy/2.6/guide/streams/index.html
+++ b/docs/en/cowboy/2.6/guide/streams/index.html
@@ -134,6 +134,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/ws_handlers/index.html b/docs/en/cowboy/2.6/guide/ws_handlers/index.html
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+++ b/docs/en/cowboy/2.6/guide/ws_handlers/index.html
@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/guide/ws_protocol/index.html b/docs/en/cowboy/2.6/guide/ws_protocol/index.html
index 375a169f..e5c68464 100644
--- a/docs/en/cowboy/2.6/guide/ws_protocol/index.html
+++ b/docs/en/cowboy/2.6/guide/ws_protocol/index.html
@@ -133,6 +133,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.6/manual/cowboy.set_env/index.html
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+++ b/docs/en/cowboy/2.6/manual/cowboy.set_env/index.html
@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.6/manual/cowboy.start_clear/index.html
index fa158708..26369ee7 100644
--- a/docs/en/cowboy/2.6/manual/cowboy.start_clear/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy.start_clear/index.html
@@ -166,6 +166,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.6/manual/cowboy.start_tls/index.html
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+++ b/docs/en/cowboy/2.6/manual/cowboy.start_tls/index.html
@@ -171,6 +171,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 155f82f9..5500bb02 100644
--- a/docs/en/cowboy/2.6/manual/cowboy.stop_listener/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy.stop_listener/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.6/manual/cowboy/index.html
@@ -165,6 +165,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index d0f4bf7f..2aa1ff1a 100644
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+++ b/docs/en/cowboy/2.6/manual/cowboy_app/index.html
@@ -172,6 +172,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index cbe334eb..b3730f50 100644
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+++ b/docs/en/cowboy/2.6/manual/cowboy_compress_h/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.6/manual/cowboy_constraints.int/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.6/manual/cowboy_constraints.nonempty/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index ff833861..87101652 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_constraints/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_constraints/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.6/manual/cowboy_handler.terminate/index.html
@@ -143,6 +143,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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--- a/docs/en/cowboy/2.6/manual/cowboy_handler/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_handler/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_http/index.html b/docs/en/cowboy/2.6/manual/cowboy_http/index.html
index a7140440..624e201b 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_http/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_http/index.html
@@ -217,6 +217,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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--- a/docs/en/cowboy/2.6/manual/cowboy_http2/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_http2/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.6/manual/cowboy_loop/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.6/manual/cowboy_middleware/index.html
index 52b371b3..5d04a79c 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_middleware/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_middleware/index.html
@@ -145,6 +145,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.binding/index.html
index 5600fd92..d2084483 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.binding/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.binding/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.bindings/index.html
index 7ed2a263..f15abc48 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.bindings/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.bindings/index.html
@@ -129,6 +129,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.body_length/index.html
index 92460c6f..bb529122 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.body_length/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.body_length/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.cert/index.html
index 4ae136b5..7435d813 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.cert/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.cert/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.delete_resp_header/index.html
index deaff4f0..0021ad72 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.delete_resp_header/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.delete_resp_header/index.html
@@ -134,6 +134,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.has_body/index.html
index 960d6442..3043e519 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.has_body/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.has_body/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_body/index.html
index 3963620d..443b0f12 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_body/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_body/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_header/index.html
index dcc481ad..40c05cd1 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_header/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_header/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.header/index.html
index 972aaf81..d6c4814b 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.header/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.header/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.headers/index.html
index dd37d730..fcab4d98 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.headers/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.headers/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.host/index.html
index cbf6b05f..b6a8a8f0 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.host/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.host/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.host_info/index.html
index 9804417a..f8661340 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.host_info/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.host_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.inform/index.html
index 7a084457..4c08eccf 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.inform/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.inform/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.match_cookies/index.html
index ad954f82..d1cb4b91 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.match_cookies/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.match_cookies/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.match_qs/index.html
index 43df19dc..f479ee8e 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.match_qs/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.match_qs/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.method/index.html
index d5827415..7ad95145 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.method/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.method/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.parse_cookies/index.html
index 5d0f23ab..fe538629 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.parse_cookies/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.parse_cookies/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.parse_header/index.html
index 2b9d3e72..5c84c825 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.parse_header/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.parse_header/index.html
@@ -307,6 +307,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.parse_qs/index.html
index 01945d56..8d426c71 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.parse_qs/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.parse_qs/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.path/index.html
index d147991f..57b50887 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.path/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.path/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.path_info/index.html
index d3517e3b..832dd011 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.path_info/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.path_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.peer/index.html
index bb98d319..e2862c41 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.peer/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.peer/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.port/index.html
index b6eaba06..071b0d61 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.port/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.port/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.push/index.html
index 76e404c8..fd6e0c87 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.push/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.push/index.html
@@ -163,6 +163,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.qs/index.html
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--- a/docs/en/cowboy/2.6/manual/cowboy_req.qs/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.qs/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.read_and_match_urlencoded_body/index.html
index b82b8df9..379996ce 100644
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+++ b/docs/en/cowboy/2.6/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -187,6 +187,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.read_body/index.html
index 54b021c0..de2b410c 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.read_body/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.read_body/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.read_part/index.html
index b4e755ed..452504e9 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.read_part/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.read_part/index.html
@@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.read_part_body/index.html
index 5678f6d6..3ce77546 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.read_part_body/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.read_part_body/index.html
@@ -159,6 +159,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.read_urlencoded_body/index.html
index 52ee2878..b5e22abf 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.read_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.read_urlencoded_body/index.html
@@ -153,6 +153,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.reply/index.html
index 66bc62db..e6afc95b 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.reply/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.reply/index.html
@@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.resp_header/index.html
index f62e0be6..14acccd0 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.resp_header/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.resp_header/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.resp_headers/index.html
index b53b5edb..b8c27637 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.resp_headers/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.resp_headers/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.scheme/index.html
index 275b9e17..65ec2cb8 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.scheme/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.scheme/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_body/index.html
index 46df356a..f6df99a6 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_body/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_body/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_cookie/index.html
index 669251d4..744d4e95 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_cookie/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_cookie/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_header/index.html
index 0d7e93e7..aae9d63e 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_header/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_header/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_headers/index.html
index 2e3762b7..5916c5ad 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_headers/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_headers/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.sock/index.html
index 101be4e0..cfdf9969 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.sock/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.sock/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.stream_body/index.html
index 1189deda..27203012 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.stream_body/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.stream_body/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.stream_events/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.stream_events/index.html
index 1d40e20b..93320bf2 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.stream_events/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.stream_events/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.stream_reply/index.html
index 151b0fe6..377a4149 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.stream_reply/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.stream_reply/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.stream_trailers/index.html
index 2d1be3a6..57bb2c44 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.stream_trailers/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.stream_trailers/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.uri/index.html
index f6a0090e..417b9c71 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.uri/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.uri/index.html
@@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.6/manual/cowboy_req.version/index.html
index d7d7cccb..5d6c0b3b 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req.version/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req.version/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_req/index.html b/docs/en/cowboy/2.6/manual/cowboy_req/index.html
index 12704846..4a14d6d2 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_req/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_req/index.html
@@ -311,6 +311,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_rest/index.html b/docs/en/cowboy/2.6/manual/cowboy_rest/index.html
index 79022c86..11125032 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_rest/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_rest/index.html
@@ -592,6 +592,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.6/manual/cowboy_router.compile/index.html
index a777ee48..68a374a3 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_router.compile/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_router.compile/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_router/index.html b/docs/en/cowboy/2.6/manual/cowboy_router/index.html
index 157d4047..5556d01f 100644
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+++ b/docs/en/cowboy/2.6/manual/cowboy_router/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_static/index.html b/docs/en/cowboy/2.6/manual/cowboy_static/index.html
index e84cdd33..f0ac23fa 100644
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+++ b/docs/en/cowboy/2.6/manual/cowboy_static/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_stream/index.html b/docs/en/cowboy/2.6/manual/cowboy_stream/index.html
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+++ b/docs/en/cowboy/2.6/manual/cowboy_stream/index.html
@@ -349,6 +349,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.6/manual/cowboy_stream_h/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.6/manual/cowboy_websocket/index.html
index 1367a31c..be89c346 100644
--- a/docs/en/cowboy/2.6/manual/cowboy_websocket/index.html
+++ b/docs/en/cowboy/2.6/manual/cowboy_websocket/index.html
@@ -243,6 +243,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/http_status_codes/index.html b/docs/en/cowboy/2.6/manual/http_status_codes/index.html
index 282e7ed8..a68bd406 100644
--- a/docs/en/cowboy/2.6/manual/http_status_codes/index.html
+++ b/docs/en/cowboy/2.6/manual/http_status_codes/index.html
@@ -181,6 +181,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.6/manual/index.html b/docs/en/cowboy/2.6/manual/index.html
index a4479de5..6e3e2de0 100644
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+++ b/docs/en/cowboy/2.6/manual/index.html
@@ -172,6 +172,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index a3500967..a119e442 100644
--- a/docs/en/cowboy/2.7/guide/constraints/index.html
+++ b/docs/en/cowboy/2.7/guide/constraints/index.html
@@ -197,6 +197,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.7/guide/cookies/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.7/guide/erlang_web/index.html
@@ -163,6 +163,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -141,6 +141,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/getting_started/index.html
@@ -215,6 +215,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -182,6 +182,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -151,6 +151,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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+++ b/docs/en/cowboy/2.7/guide/loop_handlers/index.html
@@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -149,6 +149,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/migrating_from_1.0/index.html
@@ -231,6 +231,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/migrating_from_2.0/index.html
@@ -166,6 +166,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/migrating_from_2.1/index.html
@@ -177,6 +177,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/migrating_from_2.2/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/migrating_from_2.3/index.html
@@ -151,6 +151,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/migrating_from_2.4/index.html
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@@ -194,6 +194,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/migrating_from_2.6/index.html
@@ -215,6 +215,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/modern_web/index.html
@@ -145,6 +145,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -178,6 +178,8 @@
 	
 	
 	
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+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -175,6 +175,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.7/guide/rest_handlers/index.html
@@ -276,6 +276,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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@@ -149,6 +149,8 @@
 	
 	
 	
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@@ -316,6 +316,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -480,6 +480,8 @@
 	
 	
 	
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@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
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@@ -133,6 +133,8 @@
 	
 	
 	
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@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.7/manual/cowboy.start_clear/index.html
index 0cd0a52d..301a52d6 100644
--- a/docs/en/cowboy/2.7/manual/cowboy.start_clear/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy.start_clear/index.html
@@ -166,6 +166,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.7/manual/cowboy.start_tls/index.html
index 8319c84c..6fefdb35 100644
--- a/docs/en/cowboy/2.7/manual/cowboy.start_tls/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy.start_tls/index.html
@@ -171,6 +171,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.7/manual/cowboy.stop_listener/index.html
index 358a56af..b5c173f7 100644
--- a/docs/en/cowboy/2.7/manual/cowboy.stop_listener/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy.stop_listener/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy/index.html b/docs/en/cowboy/2.7/manual/cowboy/index.html
index 81d0e39b..b51fcd98 100644
--- a/docs/en/cowboy/2.7/manual/cowboy/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy/index.html
@@ -165,6 +165,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_app/index.html b/docs/en/cowboy/2.7/manual/cowboy_app/index.html
index 04f75bb0..082e0c0b 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_app/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_app/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_compress_h/index.html b/docs/en/cowboy/2.7/manual/cowboy_compress_h/index.html
index 92f8e7cb..d2eb972d 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_compress_h/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_compress_h/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.7/manual/cowboy_constraints.int/index.html
index a7c6bfba..b79b71fb 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_constraints.int/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_constraints.int/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.7/manual/cowboy_constraints.nonempty/index.html
index 1680d7b9..d4526a1f 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_constraints.nonempty/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_constraints.nonempty/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.7/manual/cowboy_constraints/index.html
index 458ecf3f..93042917 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_constraints/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_constraints/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.7/manual/cowboy_handler.terminate/index.html
index 0e911fe0..38473b21 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_handler.terminate/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_handler.terminate/index.html
@@ -143,6 +143,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_handler/index.html b/docs/en/cowboy/2.7/manual/cowboy_handler/index.html
index 631a605a..a7b60ac4 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_handler/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_handler/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_http/index.html b/docs/en/cowboy/2.7/manual/cowboy_http/index.html
index b104149d..04015de5 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_http/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_http/index.html
@@ -229,6 +229,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_http2/index.html b/docs/en/cowboy/2.7/manual/cowboy_http2/index.html
index 6b2bdb01..ecbeb377 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_http2/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_http2/index.html
@@ -245,6 +245,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_loop/index.html b/docs/en/cowboy/2.7/manual/cowboy_loop/index.html
index cb130446..f639f718 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_loop/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_loop/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_metrics_h/index.html b/docs/en/cowboy/2.7/manual/cowboy_metrics_h/index.html
index 90ce0616..01a22968 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_metrics_h/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_metrics_h/index.html
@@ -226,6 +226,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.7/manual/cowboy_middleware/index.html
index 41e0438d..a701be99 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_middleware/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_middleware/index.html
@@ -146,6 +146,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.binding/index.html
index 84f01a64..f926435a 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.binding/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.binding/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.bindings/index.html
index c6a15f14..66063448 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.bindings/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.bindings/index.html
@@ -129,6 +129,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.body_length/index.html
index 155f3c7d..aa140db1 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.body_length/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.body_length/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.cast/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.cast/index.html
index 67b1714f..b1f26e1f 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.cast/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.cast/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.cert/index.html
index 724998d4..f59af0da 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.cert/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.cert/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.delete_resp_header/index.html
index 71a37073..8bd68b91 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.delete_resp_header/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.delete_resp_header/index.html
@@ -134,6 +134,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.filter_cookies/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.filter_cookies/index.html
index 87d53fdf..bb588986 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.filter_cookies/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.filter_cookies/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.has_body/index.html
index 7b349366..b8f0e18c 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.has_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.has_body/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_body/index.html
index 78dc48d1..22a64660 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_body/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_header/index.html
index 81e8bee1..a8923578 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_header/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.has_resp_header/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.header/index.html
index ac6294fc..dc3eef84 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.header/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.header/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.headers/index.html
index a398fa80..750b6e68 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.headers/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.headers/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.host/index.html
index f34e1659..eaaae677 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.host/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.host/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.host_info/index.html
index 2c2dcb91..56257e96 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.host_info/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.host_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.inform/index.html
index db4defc7..3df6ff35 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.inform/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.inform/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.match_cookies/index.html
index 404a9e63..a36c84a2 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.match_cookies/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.match_cookies/index.html
@@ -157,6 +157,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.match_qs/index.html
index 056abc55..ec521589 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.match_qs/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.match_qs/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.method/index.html
index 403d93fe..ca99f4f1 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.method/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.method/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.parse_cookies/index.html
index a2675ed7..bd2e692b 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.parse_cookies/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.parse_cookies/index.html
@@ -155,6 +155,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.parse_header/index.html
index 37f61ed2..0079f9aa 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.parse_header/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.parse_header/index.html
@@ -307,6 +307,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.parse_qs/index.html
index 5a60a5f7..b18bf3a5 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.parse_qs/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.parse_qs/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.path/index.html
index 5dda8d8f..19a79acc 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.path/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.path/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.path_info/index.html
index 0baba386..76f7cdc0 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.path_info/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.path_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.peer/index.html
index d3a6dc01..4d4c3aff 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.peer/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.peer/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.port/index.html
index 12de689e..b912c345 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.port/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.port/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.push/index.html
index dd390533..373e99ed 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.push/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.push/index.html
@@ -163,6 +163,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.qs/index.html
index 276c87f1..1da6dfd3 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.qs/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.qs/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.read_and_match_urlencoded_body/index.html
index a53936fb..2955a154 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.read_and_match_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -187,6 +187,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.read_body/index.html
index 2260b297..5ed952cb 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.read_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.read_body/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.read_part/index.html
index b1a044b6..8d4b2042 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.read_part/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.read_part/index.html
@@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.read_part_body/index.html
index efc2f9b3..9b7a2493 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.read_part_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.read_part_body/index.html
@@ -159,6 +159,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.read_urlencoded_body/index.html
index c72cab17..8f3a268c 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.read_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.read_urlencoded_body/index.html
@@ -153,6 +153,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.reply/index.html
index d0a651a7..fb63f757 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.reply/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.reply/index.html
@@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.resp_header/index.html
index 5925cfc0..3da1be01 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.resp_header/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.resp_header/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.resp_headers/index.html
index e10ebb96..eed687e9 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.resp_headers/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.resp_headers/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.scheme/index.html
index c8492fd3..2fcfa637 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.scheme/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.scheme/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_body/index.html
index 9613ed4d..15d8f926 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_body/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_cookie/index.html
index de63b1e7..6ca2a16a 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_cookie/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_cookie/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_header/index.html
index 4653ffae..f2c5734d 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_header/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_header/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_headers/index.html
index 3d6cc6ba..3c186eee 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_headers/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.set_resp_headers/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.sock/index.html
index 2a123170..be158dd0 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.sock/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.sock/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.stream_body/index.html
index ffa3e9ae..4fc055b6 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.stream_body/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.stream_body/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.stream_events/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.stream_events/index.html
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--- a/docs/en/cowboy/2.7/manual/cowboy_req.stream_events/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.stream_events/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 61554766..cc971ee0 100644
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+++ b/docs/en/cowboy/2.7/manual/cowboy_req.stream_reply/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.7/manual/cowboy_req.stream_trailers/index.html
index b50d5e0b..cb733be0 100644
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+++ b/docs/en/cowboy/2.7/manual/cowboy_req.stream_trailers/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index ef812c6e..05054523 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req.uri/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.uri/index.html
@@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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--- a/docs/en/cowboy/2.7/manual/cowboy_req.version/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req.version/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_req/index.html b/docs/en/cowboy/2.7/manual/cowboy_req/index.html
index 9c4255a4..e1c0ac42 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_req/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_req/index.html
@@ -317,6 +317,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_rest/index.html b/docs/en/cowboy/2.7/manual/cowboy_rest/index.html
index a03ace19..e56e2666 100644
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+++ b/docs/en/cowboy/2.7/manual/cowboy_rest/index.html
@@ -595,6 +595,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.7/manual/cowboy_router.compile/index.html
index 97b66b96..7704613c 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_router.compile/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_router.compile/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_router/index.html b/docs/en/cowboy/2.7/manual/cowboy_router/index.html
index ac4113c9..05edfc8c 100644
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+++ b/docs/en/cowboy/2.7/manual/cowboy_router/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_static/index.html b/docs/en/cowboy/2.7/manual/cowboy_static/index.html
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+++ b/docs/en/cowboy/2.7/manual/cowboy_static/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_stream/index.html b/docs/en/cowboy/2.7/manual/cowboy_stream/index.html
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+++ b/docs/en/cowboy/2.7/manual/cowboy_stream/index.html
@@ -372,6 +372,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_stream_h/index.html b/docs/en/cowboy/2.7/manual/cowboy_stream_h/index.html
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--- a/docs/en/cowboy/2.7/manual/cowboy_stream_h/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_stream_h/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_tracer_h/index.html b/docs/en/cowboy/2.7/manual/cowboy_tracer_h/index.html
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+++ b/docs/en/cowboy/2.7/manual/cowboy_tracer_h/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.7/manual/cowboy_websocket/index.html
index 19a67dc7..0e216837 100644
--- a/docs/en/cowboy/2.7/manual/cowboy_websocket/index.html
+++ b/docs/en/cowboy/2.7/manual/cowboy_websocket/index.html
@@ -290,6 +290,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/http_status_codes/index.html b/docs/en/cowboy/2.7/manual/http_status_codes/index.html
index 0ef3960e..345b1b1b 100644
--- a/docs/en/cowboy/2.7/manual/http_status_codes/index.html
+++ b/docs/en/cowboy/2.7/manual/http_status_codes/index.html
@@ -181,6 +181,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.7/manual/index.html b/docs/en/cowboy/2.7/manual/index.html
index f400d779..b82cfd20 100644
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+++ b/docs/en/cowboy/2.7/manual/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index a8ffb949..ce851b92 100644
--- a/docs/en/cowboy/2.8/guide/constraints/index.html
+++ b/docs/en/cowboy/2.8/guide/constraints/index.html
@@ -197,6 +197,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index 85543baf..1baae5ef 100644
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+++ b/docs/en/cowboy/2.8/guide/cookies/index.html
@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index c0ab37cb..2aa45699 100644
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+++ b/docs/en/cowboy/2.8/guide/erlang_web/index.html
@@ -163,6 +163,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/flow_diagram/index.html
@@ -141,6 +141,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/getting_started/index.html
@@ -215,6 +215,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/handlers/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index f8422208..f8975fa2 100644
--- a/docs/en/cowboy/2.8/guide/index.html
+++ b/docs/en/cowboy/2.8/guide/index.html
@@ -186,6 +186,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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--- a/docs/en/cowboy/2.8/guide/introduction/index.html
+++ b/docs/en/cowboy/2.8/guide/introduction/index.html
@@ -151,6 +151,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/listeners/index.html
@@ -181,6 +181,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/loop_handlers/index.html
@@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/middlewares/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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index c89879e0..acc2b162 100644
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_1.0/index.html
@@ -231,6 +231,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.0/index.html
@@ -166,6 +166,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.1/index.html
@@ -177,6 +177,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.2/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.3/index.html
@@ -151,6 +151,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.4/index.html
@@ -179,6 +179,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.5/index.html
@@ -194,6 +194,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.6/index.html
@@ -215,6 +215,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/migrating_from_2.7/index.html
@@ -171,6 +171,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/modern_web/index.html
@@ -145,6 +145,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/multipart/index.html
@@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/performance/index.html
@@ -123,6 +123,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/req/index.html
@@ -393,6 +393,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/req_body/index.html
@@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/resource_design/index.html
@@ -178,6 +178,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/resp/index.html
@@ -360,6 +360,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/rest_flowcharts/index.html
@@ -175,6 +175,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.8/guide/rest_handlers/index.html b/docs/en/cowboy/2.8/guide/rest_handlers/index.html
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+++ b/docs/en/cowboy/2.8/guide/rest_handlers/index.html
@@ -276,6 +276,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/rest_principles/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/routing/index.html
@@ -326,6 +326,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/specs/index.html
@@ -492,6 +492,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/static_files/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/streams/index.html
@@ -136,6 +136,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/guide/ws_handlers/index.html
@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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@@ -133,6 +133,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
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@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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@@ -166,6 +166,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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@@ -171,6 +171,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/manual/cowboy/index.html
@@ -165,6 +165,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.8/manual/cowboy_app/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_constraints.int/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_constraints.nonempty/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_constraints/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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@@ -143,6 +143,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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+	
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 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_handler/index.html b/docs/en/cowboy/2.8/manual/cowboy_handler/index.html
index 014e7611..a99fcacb 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_handler/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_handler/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_http/index.html b/docs/en/cowboy/2.8/manual/cowboy_http/index.html
index 5e11a8bf..3e8268a6 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_http/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_http/index.html
@@ -235,6 +235,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_http2/index.html b/docs/en/cowboy/2.8/manual/cowboy_http2/index.html
index 8a2664c3..bd68e516 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_http2/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_http2/index.html
@@ -259,6 +259,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_loop/index.html b/docs/en/cowboy/2.8/manual/cowboy_loop/index.html
index b853403a..e121e459 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_loop/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_loop/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_metrics_h/index.html b/docs/en/cowboy/2.8/manual/cowboy_metrics_h/index.html
index 17a31b57..25713c8f 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_metrics_h/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_metrics_h/index.html
@@ -226,6 +226,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.8/manual/cowboy_middleware/index.html
index 981babdf..f5f9736f 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_middleware/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_middleware/index.html
@@ -146,6 +146,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.binding/index.html
index 6c345b79..ac4926fc 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.binding/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.binding/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.bindings/index.html
index 5db24c1d..d49fc93a 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.bindings/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.bindings/index.html
@@ -129,6 +129,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.body_length/index.html
index 898c643c..1dea6a32 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.body_length/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.body_length/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.cast/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.cast/index.html
index 45157e83..9550518d 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.cast/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.cast/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.cert/index.html
index 8299e95d..2f62ccf4 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.cert/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.cert/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.delete_resp_header/index.html
index deef9171..9fbcf70e 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.delete_resp_header/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.delete_resp_header/index.html
@@ -134,6 +134,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.filter_cookies/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.filter_cookies/index.html
index 3f2b1075..d4e56f94 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.filter_cookies/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.filter_cookies/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.has_body/index.html
index c787eb70..962f374d 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.has_body/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.has_body/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_body/index.html
index de980837..28630dc3 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_body/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_body/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_header/index.html
index 4f41fc51..dd6bb8b7 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_header/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.has_resp_header/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.header/index.html
index dbb065e4..9dc9c3f1 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.header/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.header/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.headers/index.html
index d22d11cd..22897db0 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.headers/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.headers/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.host/index.html
index 3db52617..ff877083 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.host/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.host/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.host_info/index.html
index 31124429..952c8c87 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.host_info/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.host_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.inform/index.html
index b4320be6..96c712d0 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.inform/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.inform/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.match_cookies/index.html
index e9e0a436..301f9204 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.match_cookies/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.match_cookies/index.html
@@ -157,6 +157,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.match_qs/index.html
index 4bd5f8bc..5ff39fda 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.match_qs/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.match_qs/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.method/index.html
index 3a96befe..9df3084c 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.method/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.method/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.parse_cookies/index.html
index e79ed273..c67b2e61 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.parse_cookies/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.parse_cookies/index.html
@@ -155,6 +155,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.parse_header/index.html
index 44d36cf5..12da133a 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.parse_header/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.parse_header/index.html
@@ -363,6 +363,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.parse_qs/index.html
index e0fb000a..899af70d 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.parse_qs/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.parse_qs/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.path/index.html
index 05f27aea..b30dd691 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.path/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.path/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.path_info/index.html
index 9110b0fd..f4ca953b 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.path_info/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.path_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 2a2f90da..a209310b 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.peer/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.peer/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.port/index.html
index 838df53a..93764a53 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.port/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.port/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.push/index.html
index 300d5c93..c7c7e3d3 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.push/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.push/index.html
@@ -163,6 +163,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.qs/index.html
index 714403d4..42d364b9 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.qs/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.qs/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.read_and_match_urlencoded_body/index.html
index ad21a370..8f65a744 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.read_and_match_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -187,6 +187,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.read_body/index.html
index 02b459a7..474fff92 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.read_body/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.read_body/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.read_part/index.html
index 3d4d041f..8aa7069d 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.read_part/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.read_part/index.html
@@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.read_part_body/index.html
index 53027bbd..e804c268 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.read_part_body/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.read_part_body/index.html
@@ -159,6 +159,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.read_urlencoded_body/index.html
index fa1b85ea..ea9378e7 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.read_urlencoded_body/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.read_urlencoded_body/index.html
@@ -153,6 +153,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.reply/index.html
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--- a/docs/en/cowboy/2.8/manual/cowboy_req.reply/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.reply/index.html
@@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.resp_header/index.html
index 48b75923..974535a4 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.resp_header/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.resp_header/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.resp_headers/index.html
index 2b6fbe62..2a338d54 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.resp_headers/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.resp_headers/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.scheme/index.html
index 7193c9bb..b826feed 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.scheme/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.scheme/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_body/index.html
index 5bd37602..cc17155c 100644
--- a/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_body/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_body/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_cookie/index.html
index 82fa1b16..f758725c 100644
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_cookie/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_header/index.html
index c4d68e65..2a9c25be 100644
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_header/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_headers/index.html
index b242368b..6c755023 100644
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.set_resp_headers/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.sock/index.html
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--- a/docs/en/cowboy/2.8/manual/cowboy_req.sock/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.sock/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.stream_body/index.html
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.stream_body/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index 99cc8f9a..304442c9 100644
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.stream_events/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.stream_reply/index.html
index 585b6f51..094f9d2e 100644
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.stream_reply/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.stream_trailers/index.html
index a6807774..de2404b9 100644
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.stream_trailers/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.8/manual/cowboy_req.uri/index.html
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req.uri/index.html
@@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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--- a/docs/en/cowboy/2.8/manual/cowboy_req.version/index.html
+++ b/docs/en/cowboy/2.8/manual/cowboy_req.version/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.8/manual/cowboy_req/index.html b/docs/en/cowboy/2.8/manual/cowboy_req/index.html
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+++ b/docs/en/cowboy/2.8/manual/cowboy_req/index.html
@@ -317,6 +317,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_rest/index.html
@@ -595,6 +595,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_router.compile/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_router/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_static/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.8/manual/cowboy_stream/index.html
@@ -372,6 +372,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/manual/cowboy_websocket/index.html
@@ -297,6 +297,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/manual/http_status_codes/index.html
@@ -181,6 +181,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.8/manual/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/constraints/index.html
@@ -197,6 +197,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -214,6 +214,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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+	
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@@ -163,6 +163,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.9/guide/flow_diagram/index.html
@@ -141,6 +141,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.9/guide/getting_started/index.html
@@ -215,6 +215,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/handlers/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -188,6 +188,8 @@
 	
 	
 	
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+	
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@@ -151,6 +151,8 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</pre></div></div>
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/listeners/index.html
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+	
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+++ b/docs/en/cowboy/2.9/guide/loop_handlers/index.html
@@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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@@ -149,6 +149,8 @@
 	
 	
 	
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@@ -231,6 +231,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.9/guide/migrating_from_2.0/index.html
@@ -166,6 +166,8 @@
 	
 	
 	
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@@ -177,6 +177,8 @@
 	
 	
 	
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@@ -149,6 +149,8 @@
 	
 	
 	
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+++ b/docs/en/cowboy/2.9/guide/migrating_from_2.3/index.html
@@ -151,6 +151,8 @@
 	
 	
 	
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@@ -179,6 +179,8 @@
 	
 	
 	
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+	
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@@ -194,6 +194,8 @@
 	
 	
 	
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+	
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+++ b/docs/en/cowboy/2.9/guide/migrating_from_2.6/index.html
@@ -215,6 +215,8 @@
 	
 	
 	
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+	
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+++ b/docs/en/cowboy/2.9/guide/migrating_from_2.7/index.html
@@ -171,6 +171,8 @@
 	
 	
 	
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+	
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+++ b/docs/en/cowboy/2.9/guide/migrating_from_2.8/index.html
@@ -142,6 +142,8 @@
 	
 	
 	
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+	
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+++ b/docs/en/cowboy/2.9/guide/modern_web/index.html
@@ -145,6 +145,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
 	
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@@ -123,6 +123,8 @@
 	
 	
 	
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@@ -393,6 +393,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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@@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
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+	
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+++ b/docs/en/cowboy/2.9/guide/resource_design/index.html
@@ -178,6 +178,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/resp/index.html
@@ -360,6 +360,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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index 7d472fd2..d7afee90 100644
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+++ b/docs/en/cowboy/2.9/guide/rest_flowcharts/index.html
@@ -175,6 +175,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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index 943479f8..7bfb7266 100644
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+++ b/docs/en/cowboy/2.9/guide/rest_handlers/index.html
@@ -276,6 +276,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/rest_principles/index.html
@@ -149,6 +149,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/routing/index.html
@@ -326,6 +326,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/specs/index.html
@@ -496,6 +496,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/static_files/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/streams/index.html
@@ -136,6 +136,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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--- a/docs/en/cowboy/2.9/guide/ws_handlers/index.html
+++ b/docs/en/cowboy/2.9/guide/ws_handlers/index.html
@@ -301,6 +301,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/guide/ws_protocol/index.html
@@ -133,6 +133,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.9/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.9/manual/cowboy.set_env/index.html
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--- a/docs/en/cowboy/2.9/manual/cowboy.set_env/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy.set_env/index.html
@@ -148,6 +148,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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--- a/docs/en/cowboy/2.9/manual/cowboy.start_clear/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy.start_clear/index.html
@@ -166,6 +166,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.9/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.9/manual/cowboy.start_tls/index.html
index 7ed72bd2..3446780f 100644
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@@ -171,6 +171,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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diff --git a/docs/en/cowboy/2.9/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.9/manual/cowboy.stop_listener/index.html
index e33ce385..55bdebbe 100644
--- a/docs/en/cowboy/2.9/manual/cowboy.stop_listener/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy.stop_listener/index.html
@@ -131,6 +131,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/manual/cowboy/index.html
@@ -165,6 +165,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/manual/cowboy_app/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.9/manual/cowboy_constraints.int/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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+++ b/docs/en/cowboy/2.9/manual/cowboy_constraints.nonempty/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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index e168e743..1ad02ad7 100644
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+++ b/docs/en/cowboy/2.9/manual/cowboy_constraints/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.9/manual/cowboy_handler.terminate/index.html
@@ -143,6 +143,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.9/manual/cowboy_handler/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.9/manual/cowboy_http/index.html
@@ -235,6 +235,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.9/manual/cowboy_http2/index.html
@@ -269,6 +269,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.9/manual/cowboy_loop/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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+++ b/docs/en/cowboy/2.9/manual/cowboy_metrics_h/index.html
@@ -226,6 +226,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
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+++ b/docs/en/cowboy/2.9/manual/cowboy_middleware/index.html
@@ -146,6 +146,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
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--- a/docs/en/cowboy/2.9/manual/cowboy_req.binding/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.binding/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
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@@ -129,6 +129,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
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index af17aa01..262f7dae 100644
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+++ b/docs/en/cowboy/2.9/manual/cowboy_req.cast/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.cert/index.html
index 53bb0efe..06cca1b3 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.cert/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.cert/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.delete_resp_header/index.html
index b407a261..46e27dbf 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.delete_resp_header/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.delete_resp_header/index.html
@@ -134,6 +134,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.filter_cookies/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.filter_cookies/index.html
index 1f7a828f..8271c979 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.filter_cookies/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.filter_cookies/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.has_body/index.html
index 40d61617..d9b2f8fd 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.has_body/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.has_body/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_body/index.html
index d2938a07..5790b883 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_body/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_body/index.html
@@ -132,6 +132,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_header/index.html
index e53d0bfe..e3bf2825 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_header/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.has_resp_header/index.html
@@ -135,6 +135,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.header/index.html
index 8f3edb2a..a796187a 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.header/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.header/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.headers/index.html
index 0c003a8d..3b07f465 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.headers/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.headers/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.host/index.html
index 952839c0..84c4a1bb 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.host/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.host/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.host_info/index.html
index 355d78fc..0ae58374 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.host_info/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.host_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.inform/index.html
index 424f9e8a..5749ba0f 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.inform/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.inform/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.match_cookies/index.html
index 78ea48ac..fd6947d4 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.match_cookies/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.match_cookies/index.html
@@ -157,6 +157,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.match_qs/index.html
index 714af6db..9565d6ad 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.match_qs/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.match_qs/index.html
@@ -156,6 +156,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.method/index.html
index 53277694..f7a7a031 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.method/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.method/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.parse_cookies/index.html
index 209e768d..43ae9b63 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.parse_cookies/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.parse_cookies/index.html
@@ -155,6 +155,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.parse_header/index.html
index 622ab803..66449a98 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.parse_header/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.parse_header/index.html
@@ -363,6 +363,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.parse_qs/index.html
index d7db7875..058f1512 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.parse_qs/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.parse_qs/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.path/index.html
index bbed16f1..1cd74220 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.path/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.path/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.path_info/index.html
index d578acbf..107077e4 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.path_info/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.path_info/index.html
@@ -130,6 +130,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.peer/index.html
index 95379307..8c7d04f9 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.peer/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.peer/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.port/index.html
index 0acac1a1..f3b3708a 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.port/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.port/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.push/index.html
index 2d0fd90a..03b2b56f 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.push/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.push/index.html
@@ -163,6 +163,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.qs/index.html
index 419aed5f..2635569e 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.qs/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.qs/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.read_and_match_urlencoded_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.read_and_match_urlencoded_body/index.html
index 1ff95f2e..9e65db51 100644
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+++ b/docs/en/cowboy/2.9/manual/cowboy_req.read_and_match_urlencoded_body/index.html
@@ -187,6 +187,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.read_body/index.html
index 7a4a5ae6..2416055d 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.read_body/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.read_body/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.read_part/index.html
index d6342155..7869a502 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.read_part/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.read_part/index.html
@@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.read_part_body/index.html
index 62185217..e56bc9f2 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.read_part_body/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.read_part_body/index.html
@@ -159,6 +159,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.read_urlencoded_body/index.html
index e1ff29b7..a8a5f788 100644
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+++ b/docs/en/cowboy/2.9/manual/cowboy_req.read_urlencoded_body/index.html
@@ -153,6 +153,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.reply/index.html
index 5decd174..93053b2c 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.reply/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.reply/index.html
@@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.resp_header/index.html
index c1e3230c..ec110923 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.resp_header/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.resp_header/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.resp_headers/index.html
index 6867f781..610a9bbc 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.resp_headers/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.resp_headers/index.html
@@ -127,6 +127,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.scheme/index.html
index 3509da3b..4ee7e9ac 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.scheme/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.scheme/index.html
@@ -141,6 +141,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_body/index.html
index 37880b87..fe73fc6b 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_body/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_body/index.html
@@ -168,6 +168,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_cookie/index.html
index d6b33673..374cd58b 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_cookie/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_cookie/index.html
@@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_header/index.html
index 23299c33..d130ba83 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_header/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_header/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_headers/index.html
index 6f6e1958..a8989d01 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_headers/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.set_resp_headers/index.html
@@ -140,6 +140,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.sock/index.html
index 31513603..87ba93b0 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.sock/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.sock/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.stream_body/index.html
index 5cadb07e..950eaff9 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.stream_body/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.stream_body/index.html
@@ -147,6 +147,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.stream_events/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.stream_events/index.html
index 12421b05..3e35f9b4 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.stream_events/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.stream_events/index.html
@@ -161,6 +161,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.stream_reply/index.html
index 4cdaf826..05e59c3d 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.stream_reply/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.stream_reply/index.html
@@ -164,6 +164,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.stream_trailers/index.html
index 39603e36..f511ac5f 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.stream_trailers/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.stream_trailers/index.html
@@ -144,6 +144,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.uri/index.html
index 04ecc9f2..fd1038e0 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.uri/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.uri/index.html
@@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.9/manual/cowboy_req.version/index.html
index feffa35e..a106e576 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req.version/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req.version/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_req/index.html b/docs/en/cowboy/2.9/manual/cowboy_req/index.html
index 43dcaa6b..03de8314 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_req/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_req/index.html
@@ -317,6 +317,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_rest/index.html b/docs/en/cowboy/2.9/manual/cowboy_rest/index.html
index 22d41e35..e6d3099f 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_rest/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_rest/index.html
@@ -601,6 +601,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.9/manual/cowboy_router.compile/index.html
index b8bc5237..851263d6 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_router.compile/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_router.compile/index.html
@@ -137,6 +137,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_router/index.html b/docs/en/cowboy/2.9/manual/cowboy_router/index.html
index a3a60e1a..6384ce61 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_router/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_router/index.html
@@ -154,6 +154,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_static/index.html b/docs/en/cowboy/2.9/manual/cowboy_static/index.html
index e5282f22..4d232991 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_static/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_static/index.html
@@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_stream/index.html b/docs/en/cowboy/2.9/manual/cowboy_stream/index.html
index 7a561f46..bcebfa81 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_stream/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_stream/index.html
@@ -372,6 +372,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_stream_h/index.html b/docs/en/cowboy/2.9/manual/cowboy_stream_h/index.html
index 703f72eb..a224d2e6 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_stream_h/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_stream_h/index.html
@@ -136,6 +136,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_tracer_h/index.html b/docs/en/cowboy/2.9/manual/cowboy_tracer_h/index.html
index 54a07553..10d7bab7 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_tracer_h/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_tracer_h/index.html
@@ -149,6 +149,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.9/manual/cowboy_websocket/index.html
index 74711dfe..49f78176 100644
--- a/docs/en/cowboy/2.9/manual/cowboy_websocket/index.html
+++ b/docs/en/cowboy/2.9/manual/cowboy_websocket/index.html
@@ -297,6 +297,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/http_status_codes/index.html b/docs/en/cowboy/2.9/manual/http_status_codes/index.html
index 480c9762..62bfa091 100644
--- a/docs/en/cowboy/2.9/manual/http_status_codes/index.html
+++ b/docs/en/cowboy/2.9/manual/http_status_codes/index.html
@@ -181,6 +181,8 @@
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/en/cowboy/2.9/manual/index.html b/docs/en/cowboy/2.9/manual/index.html
index c67ff306..8177ece3 100644
--- a/docs/en/cowboy/2.9/manual/index.html
+++ b/docs/en/cowboy/2.9/manual/index.html
@@ -176,6 +176,8 @@ http://www.gnu.org/software/src-highlite -->
 	
 	
 	
+		<li><a href="/docs/en/cowboy/2.13/manual">2.13</a></li>
+	
 		<li><a href="/docs/en/cowboy/2.12/manual">2.12</a></li>
 	
 		<li><a href="/docs/en/cowboy/2.11/manual">2.11</a></li>
diff --git a/docs/index.html b/docs/index.html
index 32bc49e3..e60b05e1 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -68,6 +68,13 @@
 		<ul>
 		
 			
+				<li><a href="/docs/en/cowboy/2.13/guide">Cowboy 2.13 User Guide</a></li>
+			
+			
+				<li><a href="/docs/en/cowboy/2.13/manual">Cowboy 2.13 Function Reference</a></li>
+			
+		
+			
 				<li><a href="/docs/en/cowboy/2.12/guide">Cowboy 2.12 User Guide</a></li>
 			
 			
diff --git a/docs/index.xml b/docs/index.xml
index 98069483..fb9811c3 100644
--- a/docs/index.xml
+++ b/docs/index.xml
@@ -205,6 +205,17 @@ Cowboy supports all the standards listed in this document.
 HTTP/2 HTTP/2 is the most efficient protocol for consuming Web services. It enables clients to keep a connection open for long periods of time; to send requests concurrently; to reduce the size of requests through HTTP headers compression; and more. The protocol is binary, greatly reducing the resources needed to parse it.</description>
     </item>
     
+    <item>
+      <title>The modern Web</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/modern_web/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/modern_web/</guid>
+      <description>Cowboy is a server for the modern Web. This chapter explains what it means and details all the standards involved.
+Cowboy supports all the standards listed in this document.
+HTTP/2 HTTP/2 is the most efficient protocol for consuming Web services. It enables clients to keep a connection open for long periods of time; to send requests concurrently; to reduce the size of requests through HTTP headers compression; and more. The protocol is binary, greatly reducing the resources needed to parse it.</description>
+    </item>
+    
     <item>
       <title>The modern Web</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/modern_web/</link>
@@ -279,6 +290,16 @@ The Web is concurrent When you access a website there is little concurrency invo
 The Web is concurrent When you access a website there is little concurrency involved. A few connections are opened and requests are sent through these connections. Then the web page is displayed on your screen. Your browser will only open up to 4 or 8 connections to the server, depending on your settings.</description>
     </item>
     
+    <item>
+      <title>Erlang and the Web</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/erlang_web/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/erlang_web/</guid>
+      <description>Erlang is the ideal platform for writing Web applications. Its features are a perfect match for the requirements of modern Web applications.
+The Web is concurrent When you access a website there is little concurrency involved. A few connections are opened and requests are sent through these connections. Then the web page is displayed on your screen. Your browser will only open up to 4 or 8 connections to the server, depending on your settings.</description>
+    </item>
+    
     <item>
       <title>Erlang and the Web</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/erlang_web/</link>
@@ -559,6 +580,18 @@ Cowboy comes with functions for introspection and tracing, enabling developers t
 Cowboy is a high quality project. It has a small code base, is very efficient (both in latency and memory use) and can easily be embedded in another application.</description>
     </item>
     
+    <item>
+      <title>Introduction</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/introduction/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/introduction/</guid>
+      <description>Cowboy is a small, fast and modern HTTP server for Erlang/OTP.
+Cowboy aims to provide a complete modern Web stack. This includes HTTP/1.1, HTTP/2, Websocket, Server-Sent Events and Webmachine-based REST.
+Cowboy comes with functions for introspection and tracing, enabling developers to know precisely what is happening at any time. Its modular design also easily enable developers to add instrumentation.
+Cowboy is a high quality project. It has a small code base, is very efficient (both in latency and memory use) and can easily be embedded in another application.</description>
+    </item>
+    
     <item>
       <title>Introduction</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/introduction/</link>
@@ -841,6 +874,16 @@ This chapter walks you through all the steps of setting up Cowboy, writing your
 This chapter walks you through all the steps of setting up Cowboy, writing your first application and generating your first release.</description>
     </item>
     
+    <item>
+      <title>Getting started</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/getting_started/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/getting_started/</guid>
+      <description>Erlang is more than a language, it is also an operating system for your applications. Erlang developers rarely write standalone modules, they write libraries or applications, and then bundle those into what is called a release. A release contains the Erlang VM plus all applications required to run the node, so it can be pushed to production directly.
+This chapter walks you through all the steps of setting up Cowboy, writing your first application and generating your first release.</description>
+    </item>
+    
     <item>
       <title>Getting started</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/getting_started/</link>
@@ -1049,6 +1092,18 @@ Overview As you can see on the diagram, the client begins by connecting to the s
 After Ranch accepts a new connection, whether it is an HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Flow diagram</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/flow_diagram/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/flow_diagram/</guid>
+      <description>Cowboy is a lightweight HTTP server with support for HTTP/1.1, HTTP/2 and Websocket.
+It is built on top of Ranch. Please see the Ranch guide for more information about how the network connections are handled.
+Overview As you can see on the diagram, the client begins by connecting to the server. This step is handled by a Ranch acceptor, which is a process dedicated to accepting new connections.
+After Ranch accepts a new connection, whether it is an HTTP/1.</description>
+    </item>
+    
     <item>
       <title>Flow diagram</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/flow_diagram/</link>
@@ -1313,6 +1368,17 @@ This chapter is specific to Cowboy. Please refer to the Ranch User Guide for mor
 Cowboy provides two types of listeners: one listening for clear TCP connections, and one listening for secure TLS connections. Both of them support the HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Listeners</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/listeners/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/listeners/</guid>
+      <description>A listener is a set of processes that listens on a port for new connections. Incoming connections get handled by Cowboy. Depending on the connection handshake, one or another protocol may be used.
+This chapter is specific to Cowboy. Please refer to the Ranch User Guide for more information about listeners.
+Cowboy provides two types of listeners: one listening for clear TCP connections, and one listening for secure TLS connections. Both of them support the HTTP/1.</description>
+    </item>
+    
     <item>
       <title>Listeners</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/listeners/</link>
@@ -1453,6 +1519,18 @@ Cowboy routes requests using the following algorithm:
 If no configured host matches the request URI, a 400 response is returned.  Otherwise, the first configured host that matches the request URI will be used. Only the paths configured for this host will be considered.  If none of the configured paths found in the previous step match the request URI, a 404 response is returned.</description>
     </item>
     
+    <item>
+      <title>Routing</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/routing/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/routing/</guid>
+      <description>Cowboy does nothing by default.
+To make Cowboy useful, you need to map URIs to Erlang modules that will handle the requests. This is called routing.
+Cowboy routes requests using the following algorithm:
+If no configured host matches the request URI, a 400 response is returned.  Otherwise, the first configured host that matches the request URI will be used. Only the paths configured for this host will be considered.  If none of the configured paths found in the previous step match the request URI, a 404 response is returned.</description>
+    </item>
+    
     <item>
       <title>Routing</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/routing/</link>
@@ -1639,6 +1717,18 @@ Syntax Constraints are provided as a list of fields. For each field in the list,
 A field can take the form of an atom field, a tuple with constraints {field, Constraints} or a tuple with constraints and a default value {field, Constraints, Default}.</description>
     </item>
     
+    <item>
+      <title>Constraints</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/constraints/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/constraints/</guid>
+      <description>Constraints are validation and conversion functions applied to user input.
+They are used in various places in Cowboy, including the router and the cowboy_req match functions.
+Syntax Constraints are provided as a list of fields. For each field in the list, specific constraints can be applied, as well as a default value if the field is missing.
+A field can take the form of an atom field, a tuple with constraints {field, Constraints} or a tuple with constraints and a default value {field, Constraints, Default}.</description>
+    </item>
+    
     <item>
       <title>Constraints</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/constraints/</link>
@@ -1796,6 +1886,19 @@ A handler that does nothing would look like this:
 init(Req, State) -&amp;gt; {ok, Req, State}.  Despite sending no reply, a 204 No Content response will be sent to the client, as Cowboy makes sure that a response is sent for every request.</description>
     </item>
     
+    <item>
+      <title>Handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/handlers/</guid>
+      <description>Handlers are Erlang modules that handle HTTP requests.
+Plain HTTP handlers The most basic handler in Cowboy implements the mandatory init/2 callback, manipulates the request, optionally sends a response and then returns.
+This callback receives the Req object and the initial state defined in the router configuration.
+A handler that does nothing would look like this:
+init(Req, State) -&amp;gt; {ok, Req, State}.  Despite sending no reply, a 204 No Content response will be sent to the client, as Cowboy makes sure that a response is sent for every request.</description>
+    </item>
+    
     <item>
       <title>Handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/handlers/</link>
@@ -1964,6 +2067,16 @@ Loop handlers are used for requests where a response might not be immediately av
 Loop handlers are used for requests where a response might not be immediately available, but where you would like to keep the connection open for a while in case the response arrives. The most known example of such practice is known as long polling.</description>
     </item>
     
+    <item>
+      <title>Loop handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/loop_handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/loop_handlers/</guid>
+      <description>Loop handlers are a special kind of HTTP handlers used when the response can not be sent right away. The handler enters instead a receive loop waiting for the right message before it can send a response.
+Loop handlers are used for requests where a response might not be immediately available, but where you would like to keep the connection open for a while in case the response arrives. The most known example of such practice is known as long polling.</description>
+    </item>
+    
     <item>
       <title>Loop handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/loop_handlers/</link>
@@ -2067,6 +2180,17 @@ For systems in production, consider using one of the many Content Distribution N
 The static handler can serve either one file or all files from a given directory. The etag generation and mime types can be configured.</description>
     </item>
     
+    <item>
+      <title>Static files</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/static_files/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/static_files/</guid>
+      <description>Cowboy comes with a ready to use handler for serving static files. It is provided as a convenience for serving files during development.
+For systems in production, consider using one of the many Content Distribution Network (CDN) available on the market, as they are the best solution for serving files.
+The static handler can serve either one file or all files from a given directory. The etag generation and mime types can be configured.</description>
+    </item>
+    
     <item>
       <title>Static files</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/static_files/</link>
@@ -2230,6 +2354,17 @@ It is not really an object in the object-oriented sense. It is a simple map that
 The Req object is the subject of a few different chapters. In this chapter we will learn about the Req object and look at how to retrieve information about the request.</description>
     </item>
     
+    <item>
+      <title>The Req object</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/req/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/req/</guid>
+      <description>The Req object is a variable used for obtaining information about a request, read its body or send a response.
+It is not really an object in the object-oriented sense. It is a simple map that can be directly accessed or used when calling functions from the cowboy_req module.
+The Req object is the subject of a few different chapters. In this chapter we will learn about the Req object and look at how to retrieve information about the request.</description>
+    </item>
+    
     <item>
       <title>The Req object</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/req/</link>
@@ -2374,6 +2509,18 @@ Cowboy will not cache the body, it is therefore only possible to read it once.
 You are not required to read it, however. If a body is present and was not read, Cowboy will either cancel or skip its download, depending on the protocol.</description>
     </item>
     
+    <item>
+      <title>Reading the request body</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/req_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/req_body/</guid>
+      <description>The request body can be read using the Req object.
+Cowboy will not attempt to read the body until requested. You need to call the body reading functions in order to retrieve it.
+Cowboy will not cache the body, it is therefore only possible to read it once.
+You are not required to read it, however. If a body is present and was not read, Cowboy will either cancel or skip its download, depending on the protocol.</description>
+    </item>
+    
     <item>
       <title>Reading the request body</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/req_body/</link>
@@ -2478,6 +2625,18 @@ Cowboy also provides a simplified interface for sending files. It can also send
 While only one response is allowed for every request, HTTP/2 introduced a mechanism that allows the server to push additional resources related to the response.</description>
     </item>
     
+    <item>
+      <title>Sending a response</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/resp/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/resp/</guid>
+      <description>The response must be sent using the Req object.
+Cowboy provides two different ways of sending responses: either directly or by streaming the body. Response headers and body may be set in advance. The response is sent as soon as one of the reply or stream reply function is called.
+Cowboy also provides a simplified interface for sending files. It can also send only specific parts of a file.
+While only one response is allowed for every request, HTTP/2 introduced a mechanism that allows the server to push additional resources related to the response.</description>
+    </item>
+    
     <item>
       <title>Sending a response</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/resp/</link>
@@ -2609,6 +2768,16 @@ Cookies are a name/value store where the names and values are stored in plain te
 Cookies are a name/value store where the names and values are stored in plain text. They expire either after a delay or when the browser closes. They can be configured on a specific domain name or path, and restricted to secure resources (sent or downloaded over HTTPS), or restricted to the server (disallowing access from client-side scripts).</description>
     </item>
     
+    <item>
+      <title>Using cookies</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/cookies/</guid>
+      <description>Cookies are a mechanism allowing applications to maintain state on top of the stateless HTTP protocol.
+Cookies are a name/value store where the names and values are stored in plain text. They expire either after a delay or when the browser closes. They can be configured on a specific domain name or path, and restricted to secure resources (sent or downloaded over HTTPS), or restricted to the server (disallowing access from client-side scripts).</description>
+    </item>
+    
     <item>
       <title>Using cookies</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/cookies/</link>
@@ -2682,6 +2851,17 @@ A multipart message is a list of parts. A part contains headers and a body. The
 In the context of HTTP, multipart is most often used with the multipart/form-data media type.</description>
     </item>
     
+    <item>
+      <title>Multipart requests</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/multipart/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/multipart/</guid>
+      <description>Multipart originates from MIME, an Internet standard that extends the format of emails.
+A multipart message is a list of parts. A part contains headers and a body. The body of the parts may be of any media type, and contain text or binary data. It is possible for parts to contain a multipart media type.
+In the context of HTTP, multipart is most often used with the multipart/form-data media type.</description>
+    </item>
+    
     <item>
       <title>Multipart requests</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/multipart/</link>
@@ -2790,6 +2970,17 @@ REST is often confused with performing a distinct operation depending on the HTT
 We will first attempt to define REST and will look at what it means in the context of HTTP and the Web. For a more in-depth explanation of REST, you can read Roy T.</description>
     </item>
     
+    <item>
+      <title>REST principles</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_principles/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_principles/</guid>
+      <description>This chapter will attempt to define the concepts behind REST and explain what makes a service RESTful.
+REST is often confused with performing a distinct operation depending on the HTTP method, while using more than the GET and POST methods. That&amp;apos;s highly misguided at best.
+We will first attempt to define REST and will look at what it means in the context of HTTP and the Web. For a more in-depth explanation of REST, you can read Roy T.</description>
+    </item>
+    
     <item>
       <title>REST principles</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_principles/</link>
@@ -2880,6 +3071,18 @@ Initialization First, the init/2 callback is called. This callback is common to
 init(Req, State) -&amp;gt; {cowboy_rest, Req, State}.</description>
     </item>
     
+    <item>
+      <title>REST handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_handlers/</guid>
+      <description>REST is implemented in Cowboy as a sub protocol. The request is handled as a state machine with many optional callbacks describing the resource and modifying the machine&amp;apos;s behavior.
+The REST handler is the recommended way to handle HTTP requests.
+Initialization First, the init/2 callback is called. This callback is common to all handlers. To use REST for the current request, this function must return a cowboy_rest tuple.
+init(Req, State) -&amp;gt; {cowboy_rest, Req, State}.</description>
+    </item>
+    
     <item>
       <title>REST handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_handlers/</link>
@@ -2961,6 +3164,17 @@ There are four main paths that requests may follow. One for the method OPTIONS;
 All paths start with the &amp;quot;Start&amp;quot; diagram, and all paths excluding the OPTIONS path go through the &amp;quot;Content negotiation&amp;quot; diagram and optionally the &amp;quot;Conditional requests&amp;quot; diagram if the resource exists.</description>
     </item>
     
+    <item>
+      <title>REST flowcharts</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_flowcharts/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_flowcharts/</guid>
+      <description>This chapter will explain the REST handler state machine through a number of different diagrams.
+There are four main paths that requests may follow. One for the method OPTIONS; one for the methods GET and HEAD; one for the methods PUT, POST and PATCH; and one for the method DELETE.
+All paths start with the &amp;quot;Start&amp;quot; diagram, and all paths excluding the OPTIONS path go through the &amp;quot;Content negotiation&amp;quot; diagram and optionally the &amp;quot;Conditional requests&amp;quot; diagram if the resource exists.</description>
+    </item>
+    
     <item>
       <title>REST flowcharts</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_flowcharts/</link>
@@ -3035,6 +3249,16 @@ The service Can the service become unavailable, and when it does, can we detect
 The service Can the service become unavailable, and when it does, can we detect it? For example, database connectivity problems may be detected early. We may also have planned outages of all or parts of the system.</description>
     </item>
     
+    <item>
+      <title>Designing a resource handler</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/resource_design/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/resource_design/</guid>
+      <description>This chapter aims to provide you with a list of questions you must answer in order to write a good resource handler. It is meant to be usable as a step by step guide.
+The service Can the service become unavailable, and when it does, can we detect it? For example, database connectivity problems may be detected early. We may also have planned outages of all or parts of the system.</description>
+    </item>
+    
     <item>
       <title>Designing a resource handler</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/resource_design/</link>
@@ -3108,6 +3332,17 @@ Description Websocket is an extension to HTTP that emulates plain TCP connection
 Websocket connections are fully asynchronous, unlike HTTP/1.1 (synchronous) and HTTP/2 (asynchronous, but the server can only initiate streams in response to requests).</description>
     </item>
     
+    <item>
+      <title>The Websocket protocol</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_protocol/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_protocol/</guid>
+      <description>This chapter explains what Websocket is and why it is a vital component of soft realtime Web applications.
+Description Websocket is an extension to HTTP that emulates plain TCP connections between the client, typically a Web browser, and the server. It uses the HTTP Upgrade mechanism to establish the connection.
+Websocket connections are fully asynchronous, unlike HTTP/1.1 (synchronous) and HTTP/2 (asynchronous, but the server can only initiate streams in response to requests).</description>
+    </item>
+    
     <item>
       <title>The Websocket protocol</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/ws_protocol/</link>
@@ -3182,6 +3417,16 @@ As Websocket connections are established through the HTTP/1.1 upgrade mechanism,
 As Websocket connections are established through the HTTP/1.1 upgrade mechanism, Websocket handlers need to be able to first receive the HTTP request for the upgrade, before switching to Websocket and taking over the connection. They can then receive or send Websocket frames, handle incoming Erlang messages or close the connection.</description>
     </item>
     
+    <item>
+      <title>Websocket handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_handlers/</guid>
+      <description>Websocket handlers provide an interface for upgrading HTTP/1.1 connections to Websocket and sending or receiving frames on the Websocket connection.
+As Websocket connections are established through the HTTP/1.1 upgrade mechanism, Websocket handlers need to be able to first receive the HTTP request for the upgrade, before switching to Websocket and taking over the connection. They can then receive or send Websocket frames, handle incoming Erlang messages or close the connection.</description>
+    </item>
+    
     <item>
       <title>Websocket handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/ws_handlers/</link>
@@ -3255,6 +3500,17 @@ The term stream comes from HTTP/2. In Cowboy, it is also used when talking about
 All versions of HTTP allow clients to initiate streams. HTTP/2 is the only one also allowing servers, through its server push feature. Both client and server-initiated streams go through the same process in Cowboy.</description>
     </item>
     
+    <item>
+      <title>Streams</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/streams/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/streams/</guid>
+      <description>A stream is the set of messages that form an HTTP request/response pair.
+The term stream comes from HTTP/2. In Cowboy, it is also used when talking about HTTP/1.1 or HTTP/1.0. It should not be confused with streaming the request or response body.
+All versions of HTTP allow clients to initiate streams. HTTP/2 is the only one also allowing servers, through its server push feature. Both client and server-initiated streams go through the same process in Cowboy.</description>
+    </item>
+    
     <item>
       <title>Streams</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/streams/</link>
@@ -3332,6 +3588,17 @@ Middlewares give you complete control over how requests are to be processed. You
 Cowboy will execute all middlewares in the given order, unless one of them decides to stop processing.</description>
     </item>
     
+    <item>
+      <title>Middlewares</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/middlewares/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/middlewares/</guid>
+      <description>Cowboy delegates the request processing to middleware components. By default, two middlewares are defined, for the routing and handling of the request, as is detailed in most of this guide.
+Middlewares give you complete control over how requests are to be processed. You can add your own middlewares to the mix or completely change the chain of middlewares as needed.
+Cowboy will execute all middlewares in the given order, unless one of them decides to stop processing.</description>
+    </item>
+    
     <item>
       <title>Middlewares</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/middlewares/</link>
@@ -3428,6 +3695,16 @@ One process per connection The first version of Cowboy featured a single process
 One process per connection The first version of Cowboy featured a single process per connection, whereas the current version of Cowboy features one process per connection plus one process per request. This has a negative impact on performance, but is necessary in order to provide a common interface for both HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Performance</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/performance/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/performance/</guid>
+      <description>This chapter describes the performance characteristics of Cowboy and offers suggestions to get the most performance out of your application.
+One process per connection The first version of Cowboy featured a single process per connection, whereas the current version of Cowboy features one process per connection plus one process per request. This has a negative impact on performance, but is necessary in order to provide a common interface for both HTTP/1.</description>
+    </item>
+    
     <item>
       <title>Performance</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.8/guide/performance/</link>
@@ -3470,6 +3747,17 @@ Cowboy 2.12 requires Erlang/OTP 24.0 or greater.
 Features added A new HTTP/2 option max_fragmented_header_block_size has been added to limit the size of header blocks that are sent over multiple HEADERS and CONTINUATION frames.  Update Cowlib to 2.13.0.   </description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.12 to 2.13</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/</guid>
+      <description>Cowboy 2.13 focuses on improving the performance of Websocket, as well as the HTTP protocols. It also contains a variety of new features and bug fixes. In addition, Cowboy 2.13 is the first Cowboy version that contains the experimental HTTP/3 support.
+Cowboy 2.13 requires Erlang/OTP 24.0 or greater.
+Features added The option dynamic_buffer has been added. When enabled, Cowboy will dynamically change the buffer socket option based on how much data it receives.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.7 to 2.8</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.8/guide/migrating_from_2.7/</link>
@@ -3565,6 +3853,17 @@ Cowboy 2.11 requires Erlang/OTP 24.0 or greater.
 Cowboy is now using GitHub Actions for CI. The main reason for the move is to reduce costs by no longer having to self-host CI runners. The downside is that GitHub runners are less reliable and timing dependent tests are now more likely to fail.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.11 to 2.12</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.11/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.11/</guid>
+      <description>Cowboy 2.12 contains a small security improvement for the HTTP/2 protocol.
+Cowboy 2.12 requires Erlang/OTP 24.0 or greater.
+Features added A new HTTP/2 option max_fragmented_header_block_size has been added to limit the size of header blocks that are sent over multiple HEADERS and CONTINUATION frames.  Update Cowlib to 2.13.0.   </description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.9 to 2.10</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/guide/migrating_from_2.9/</link>
@@ -3637,6 +3936,17 @@ Cowboy 2.9 is the first release to support the much awaited Erlang/OTP 24 out of
 Cowboy 2.9 also contains a small number of tweaks and bug fixes.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.10 to 2.11</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.10/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.10/</guid>
+      <description>Cowboy 2.11 contains a variety of new features and bug fixes. Nearly all previously experimental features are now marked as stable, including Websocket over HTTP/2. Included is a fix for an HTTP/2 protocol CVE.
+Cowboy 2.11 requires Erlang/OTP 24.0 or greater.
+Cowboy is now using GitHub Actions for CI. The main reason for the move is to reduce costs by no longer having to self-host CI runners. The downside is that GitHub runners are less reliable and timing dependent tests are now more likely to fail.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.9 to 2.10</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.9/</link>
@@ -3720,13 +4030,24 @@ Cowboy 2.9 also contains a small number of tweaks and bug fixes.</description>
     </item>
     
     <item>
-      <title>Migrating from Cowboy 2.2 to 2.3</title>
-      <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</link>
+      <title>Migrating from Cowboy 2.9 to 2.10</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.9/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</guid>
-      <description>Cowboy 2.3 focused on making the Cowboy processes behave properly according to OTP principles. This version is a very good milestone toward that goal and most of everything should now work. Release upgrades and a few details will be improved in future versions.
-Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.9/</guid>
+      <description>Cowboy 2.10 is a maintenance release adding support for Erlang/OTP 26. The main change is a Cowlib update to fix a compilation error that only occurs starting from OTP 26.
+Cowboy 2.10 requires Erlang/OTP 22.0 or greater.
+Features added Add support for Default value of SameSite cookie attribute.  Add support for the stale-* cache-control directives from RFC 5861.  Update Cowlib to 2.12.1.   Bugs fixed Fix a compilation error in Cowlib when using Erlang/OTP 26.</description>
+    </item>
+    
+    <item>
+      <title>Migrating from Cowboy 2.2 to 2.3</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</guid>
+      <description>Cowboy 2.3 focused on making the Cowboy processes behave properly according to OTP principles. This version is a very good milestone toward that goal and most of everything should now work. Release upgrades and a few details will be improved in future versions.
+Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
     </item>
     
     <item>
@@ -3789,6 +4110,17 @@ Features added Add support for the PROXY protocol header. It can be enabled via
 Cowboy 2.8 also contains a small number of tweaks and bug fixes. Cowboy 2.8 is the first Cowboy release, ever, to be consistently green on all tested platforms.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.8 to 2.9</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.8/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.8/</guid>
+      <description>Cowboy 2.9 implements graceful shutdown of connection processes for both HTTP/1.1 and HTTP/2 connections.
+Cowboy 2.9 is the first release to support the much awaited Erlang/OTP 24 out of the box. While users that were using Ranch 2.0 already were ready for OTP 24, the Ranch version used by Cowboy out of the box was not compatible and had to be updated.
+Cowboy 2.9 also contains a small number of tweaks and bug fixes.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.1 to 2.2</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.1/</link>
@@ -3859,6 +4191,16 @@ Features added Add support for the PROXY protocol header. It can be enabled via
       <description>Cowboy 2.7 improves the HTTP/2 code with optimizations around the sending of DATA and WINDOW_UPDATE frames; graceful shutdown of the connection when the client is going away; and rate limiting mechanisms. New options and mechanisms have also been added to control the amount of memory Cowboy ends up using with both HTTP/1.1 and HTTP/2. Much, but not all, of this work was done to address HTTP/2 CVEs about potential denial of service.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.7 to 2.8</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.7/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.7/</guid>
+      <description>Cowboy 2.8 contains many optimizations for all protocols. HTTP/1.1 has received the largest improvements and Cowboy will now be able to handle noticeably more requests. Thanks to the folks at Stressgrid for helping identify that the performance was lower than it should have been and for benchmarking my many changes and experiments.
+Cowboy 2.8 also contains a small number of tweaks and bug fixes. Cowboy 2.8 is the first Cowboy release, ever, to be consistently green on all tested platforms.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.0 to 2.1</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.0/</link>
@@ -3930,6 +4272,15 @@ A large number of tickets were also closed which resulted in many bugs fixed and
 Features added Add support for the PROXY protocol header. It can be enabled via the proxy_header option.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.6 to 2.7</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.6/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.6/</guid>
+      <description>Cowboy 2.7 improves the HTTP/2 code with optimizations around the sending of DATA and WINDOW_UPDATE frames; graceful shutdown of the connection when the client is going away; and rate limiting mechanisms. New options and mechanisms have also been added to control the amount of memory Cowboy ends up using with both HTTP/1.1 and HTTP/2. Much, but not all, of this work was done to address HTTP/2 CVEs about potential denial of service.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 1.0 to 2.0</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_1.0/</link>
@@ -4002,6 +4353,17 @@ Features added Add experimental support for Websocket over HTTP/2. You can use t
 Features added Add option linger_timeout to control how long Cowboy will wait before closing the socket when shutting down the connection. This helps avoid the TCP reset problem HTTP/1.1 suffers from. The default is now 1000 ms.  It is now possible to stream a response body without using chunked transfer-encoding when the protocol is HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.5 to 2.6</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.5/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.5/</guid>
+      <description>Cowboy 2.6 greatly refactored the HTTP/2 code, a large part of which was moved to Cowlib and is now used by both the Cowboy server and the Gun client.
+A large number of tickets were also closed which resulted in many bugs fixed and many features and options added, although some of them are still experimental.
+Features added Add support for the PROXY protocol header. It can be enabled via the proxy_header option.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/specs/</link>
@@ -4073,6 +4435,16 @@ Features added Add support for all functions from the module sys. Note that Cowb
 Features added Add experimental support for Websocket over HTTP/2. You can use the enable_connect_protocol option to enable. It implements the following draft: https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01  Add options max_decode_table_size and max_encode_table_size to restrict the size of the HPACK compression dictionary.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.4 to 2.5</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.4/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.4/</guid>
+      <description>Cowboy 2.5 focused on making the test suites pass. A variety of new features, fixes and improvements have also been worked on.
+Features added Add option linger_timeout to control how long Cowboy will wait before closing the socket when shutting down the connection. This helps avoid the TCP reset problem HTTP/1.1 suffers from. The default is now 1000 ms.  It is now possible to stream a response body without using chunked transfer-encoding when the protocol is HTTP/1.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.8/guide/specs/</link>
@@ -4124,6 +4496,16 @@ Features added Add support for sending trailers at the end of response bodies. T
 Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.3 to 2.4</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.3/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.3/</guid>
+      <description>Cowboy 2.4 focused on improving the HTTP/2 implementation. All existing tests from RFC7540 and the h2spec test suite now all pass. Numerous options have been added to control SETTINGS and related behavior. In addition experimental support for Websocket over HTTP/2 was added.
+Features added Add experimental support for Websocket over HTTP/2. You can use the enable_connect_protocol option to enable. It implements the following draft: https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01  Add options max_decode_table_size and max_encode_table_size to restrict the size of the HPACK compression dictionary.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.9/guide/specs/</link>
@@ -4165,6 +4547,16 @@ Features added It is now possible to obtain the client TLS certificate and the l
 Features added Add support for sending trailers at the end of response bodies. Trailers are additional header fields that may be sent after the body to add more information to the response. Their usage is required in gRPC servers. They are optional and may be discarded in other scenarios (for example if the request goes through an HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.2 to 2.3</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.2/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.2/</guid>
+      <description>Cowboy 2.3 focused on making the Cowboy processes behave properly according to OTP principles. This version is a very good milestone toward that goal and most of everything should now work. Release upgrades and a few details will be improved in future versions.
+Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/guide/specs/</link>
@@ -4196,6 +4588,16 @@ Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erl
 Features added It is now possible to obtain the client TLS certificate and the local IP/port for the connection from the Req object.  Informational responses (1XX responses) can now be sent. They must be sent before initiating the final response.  The expect: 100-continue header is now handled automatically.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.1 to 2.2</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.1/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.1/</guid>
+      <description>Cowboy 2.2 focused on adding features required for writing gRPC servers and on completing test suites for the core HTTP RFCs, fixing many bugs along the way.
+Features added Add support for sending trailers at the end of response bodies. Trailers are additional header fields that may be sent after the body to add more information to the response. Their usage is required in gRPC servers. They are optional and may be discarded in other scenarios (for example if the request goes through an HTTP/1.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/guide/specs/</link>
@@ -4217,6 +4619,16 @@ The documentation has seen great work, in particular the manual. Each module and
 Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erlang/OTP 19.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.0 to 2.1</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.0/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.0/</guid>
+      <description>Cowboy 2.1 focused on adding features that were temporarily removed in Cowboy 2.0. A number of bugs found in the 2.0 release were also fixed.
+Features added It is now possible to obtain the client TLS certificate and the local IP/port for the connection from the Req object.  Informational responses (1XX responses) can now be sent. They must be sent before initiating the final response.  The expect: 100-continue header is now handled automatically.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.12/guide/specs/</link>
@@ -4227,6 +4639,27 @@ Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erl
 HTTP IANA Registries HTTP Method Registry  HTTP Status Code Registry  Message Headers  HTTP Parameters  HTTP Alt-Svc Parameter Registry  HTTP Authentication Scheme Registry  HTTP Cache Directive Registry  HTTP Digest Algorithm Values  HTTP Origin-Bound Authentication Device Identifier Types  HTTP Upgrade Token Registry  HTTP Warn Codes  HTTP/2 Parameters  WebSocket Protocol Registries   Current CORS: Cross-Origin Resource Sharing  CSP2: Content Security Policy Level 2  DNT: Tracking Preference Expression (DNT)  eventsource: Server-Sent Events  Form content types: Form content types  Preload: Preload  PROXY: The PROXY protocol  REST: Fielding&amp;apos;s Dissertation  RFC 1945: HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 1.0 to 2.0</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_1.0/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_1.0/</guid>
+      <description>A lot has changed between Cowboy 1.0 and 2.0. The cowboy_req interface in particular has seen a massive revamp. Hooks are gone, their functionality can now be achieved via stream handlers.
+The documentation has seen great work, in particular the manual. Each module and each function now has its own dedicated manual page with full details and examples.
+Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erlang/OTP 19.</description>
+    </item>
+    
+    <item>
+      <title>HTTP and other specifications</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/specs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/specs/</guid>
+      <description>This chapter intends to list all the specification documents for or related to HTTP.
+HTTP IANA Registries HTTP Method Registry  HTTP Status Code Registry  Message Headers  HTTP Parameters  HTTP Alt-Svc Parameter Registry  HTTP Authentication Scheme Registry  HTTP Cache Directive Registry  HTTP Digest Algorithm Values  HTTP Origin-Bound Authentication Device Identifier Types  HTTP Upgrade Token Registry  HTTP Warn Codes  HTTP/2 Parameters  WebSocket Protocol Registries   Current CORS: Cross-Origin Resource Sharing  CSP2: Content Security Policy Level 2  DNT: Tracking Preference Expression (DNT)  eventsource: Server-Sent Events  Form content types: Form content types  Preload: Preload  PROXY: The PROXY protocol  REST: Fielding&amp;apos;s Dissertation  RFC 1945: HTTP/1.</description>
+    </item>
+    
     <item>
       <title>cow_cookie(3)</title>
       <link>https://ninenines.eu/docs/en/cowlib/2.10/manual/cow_cookie/</link>
@@ -4702,6 +5135,19 @@ Modules Functions:
 cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
     </item>
     
+    <item>
+      <title>Cowboy Function Reference</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/</guid>
+      <description>Name cowboy - Small, fast, modern HTTP server for Erlang/OTP
+Description Cowboy is an HTTP server for Erlang/OTP with support for the HTTP/1.1, HTTP/2 and Websocket protocols.
+Cowboy aims to provide a complete HTTP stack. This includes the implementation of the HTTP RFCs but also any directly related standards, like Websocket or Server-Sent Events.
+Modules Functions:
+cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
+    </item>
+    
     <item>
       <title>Cowboy Function Reference</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/</link>
@@ -4781,6 +5227,15 @@ cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_ro
       <description>Rationale The modern Web  Erlang and the Web   Introduction Introduction  Getting started  Flow diagram   Configuration Listeners  Routing  Constraints   Handlers Handlers  Loop handlers  Static files   Request and response Request details  Reading the request body  Sending a response  Using cookies  Multipart   REST REST principles  Handling REST requests  REST flowcharts  Designing a resource handler   Websocket The Websocket protocol  Websocket handlers   Advanced Streams  Middlewares  Performance   Additional information Migrating from Cowboy 2.</description>
     </item>
     
+    <item>
+      <title>Cowboy User Guide</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/</guid>
+      <description>Rationale The modern Web  Erlang and the Web   Introduction Introduction  Getting started  Flow diagram   Configuration Listeners  Routing  Constraints   Handlers Handlers  Loop handlers  Static files   Request and response Request details  Reading the request body  Sending a response  Using cookies  Multipart   REST REST principles  Handling REST requests  REST flowcharts  Designing a resource handler   Websocket The Websocket protocol  Websocket handlers   Advanced Streams  Middlewares  Performance   Additional information Migrating from Cowboy 2.</description>
+    </item>
+    
     <item>
       <title>Cowboy User Guide</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/</link>
@@ -4850,6 +5305,17 @@ Description The module cowboy provides convenience functions for manipulating Ra
 Exports cowboy:start_clear(3) - Listen for connections using plain TCP  cowboy:start_tls(3) - Listen for connections using TLS  cowboy:stop_listener(3) - Stop the given listener  cowboy:get_env(3) - Retrieve a listener&amp;apos;s environment value  cowboy:set_env(3) - Update a listener&amp;apos;s environment value   Types fields() fields() :: [Name | {Name, Constraints} | {Name, Constraints, Default}] Name :: atom() Constraints :: Constraint | [Constraint] Constraint :: cowboy_constraints:constraint() Default :: any()  Fields description for match operations.</description>
     </item>
     
+    <item>
+      <title>cowboy(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy/</guid>
+      <description>Name cowboy - HTTP server
+Description The module cowboy provides convenience functions for manipulating Ranch listeners.
+Exports cowboy:start_clear(3) - Listen for connections using plain TCP  cowboy:start_tls(3) - Listen for connections using TLS  cowboy:stop_listener(3) - Stop the given listener  cowboy:get_env(3) - Retrieve a listener&amp;apos;s environment value  cowboy:set_env(3) - Update a listener&amp;apos;s environment value   Types fields() fields() :: [Name | {Name, Constraints} | {Name, Constraints, Default}] Name :: atom() Constraints :: Constraint | [Constraint] Constraint :: cowboy_constraints:constraint() Default :: any()  Fields description for match operations.</description>
+    </item>
+    
     <item>
       <title>cowboy(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy/</link>
@@ -4933,6 +5399,19 @@ Modules Functions:
 cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
     </item>
     
+    <item>
+      <title>cowboy(7)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_app/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_app/</guid>
+      <description>Name cowboy - Small, fast, modern HTTP server for Erlang/OTP
+Description Cowboy is an HTTP server for Erlang/OTP with support for the HTTP/1.1, HTTP/2 and Websocket protocols.
+Cowboy aims to provide a complete HTTP stack. This includes the implementation of the HTTP RFCs but also any directly related standards, like Websocket or Server-Sent Events.
+Modules Functions:
+cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
+    </item>
+    
     <item>
       <title>cowboy(7)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_app/</link>
@@ -5011,6 +5490,19 @@ Arguments Name The name of the listener to access.
 The name of the listener is the first argument given to the cowboy:start_clear(3), cowboy:start_tls(3) or ranch:start_listener(3) function.</description>
     </item>
     
+    <item>
+      <title>cowboy:get_env(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.get_env/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.get_env/</guid>
+      <description>Name cowboy:get_env - Retrieve a listener&amp;apos;s environment value
+Description get_env(Name :: ranch:ref(), Key :: atom()) -&amp;gt; any() get_env(Name :: ranch:ref(), Key :: atom(), Default :: any()) -&amp;gt; any()  Retrieve an environment value for a previously started listener.
+This function may crash when the key is missing from the environment and a default value is not provided.
+Arguments Name The name of the listener to access.
+The name of the listener is the first argument given to the cowboy:start_clear(3), cowboy:start_tls(3) or ranch:start_listener(3) function.</description>
+    </item>
+    
     <item>
       <title>cowboy:set_env(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy.set_env/</link>
@@ -5050,6 +5542,19 @@ The new value will only be available to new connections. Pre-existing connection
 Arguments Name The name of the listener to update.</description>
     </item>
     
+    <item>
+      <title>cowboy:set_env(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.set_env/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.set_env/</guid>
+      <description>Name cowboy:set_env - Update a listener&amp;apos;s environment value
+Description set_env(Name :: ranch:ref(), Key :: atom(), Value :: any()) -&amp;gt; ok  Set or update an environment value for a previously started listener.
+This is most useful for updating the routes dynamically, without having to restart the listener.
+The new value will only be available to new connections. Pre-existing connections will still use the old value.
+Arguments Name The name of the listener to update.</description>
+    </item>
+    
     <item>
       <title>cowboy:set_env(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.set_env/</link>
@@ -5138,6 +5643,18 @@ Both HTTP/1.1 and HTTP/2 are supported on this listener. HTTP/2 has two methods
 Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
     </item>
     
+    <item>
+      <title>cowboy:start_clear(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_clear/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_clear/</guid>
+      <description>Name cowboy:start_clear - Listen for connections using plain TCP
+Description start_clear(Name :: ranch:ref(), TransportOpts :: ranch_tcp:opts(), ProtocolOpts :: opts()) -&amp;gt; {ok, ListenerPid :: pid()} | {error, any()}  Start listening for connections over a clear TCP channel.
+Both HTTP/1.1 and HTTP/2 are supported on this listener. HTTP/2 has two methods of establishing a connection over a clear TCP channel. Both the upgrade and the prior knowledge methods are supported.
+Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
+    </item>
+    
     <item>
       <title>cowboy:start_clear(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.start_clear/</link>
@@ -5222,6 +5739,18 @@ Both HTTP/1.1 and HTTP/2 are supported on this listener. The ALPN TLS extension
 Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
     </item>
     
+    <item>
+      <title>cowboy:start_tls(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_tls/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_tls/</guid>
+      <description>Name cowboy:start_tls - Listen for connections using TLS
+Description start_tls(Name :: ranch:ref(), TransportOpts :: ranch_ssl:opts(), ProtocolOpts :: opts()) -&amp;gt; {ok, ListenerPid :: pid()} | {error, any()}  Start listening for connections over a secure TLS channel.
+Both HTTP/1.1 and HTTP/2 are supported on this listener. The ALPN TLS extension must be used to initiate an HTTP/2 connection.
+Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
+    </item>
+    
     <item>
       <title>cowboy:start_tls(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.start_tls/</link>
@@ -5315,6 +5844,21 @@ The name of the listener is the first argument given to the cowboy:start_clear(3
 The {error, not_found} tuple is returned when the listener does not exist.</description>
     </item>
     
+    <item>
+      <title>cowboy:stop_listener(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.stop_listener/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.stop_listener/</guid>
+      <description>Name cowboy:stop_listener - Stop the given listener
+Description stop_listener(Name :: ranch:ref()) -&amp;gt; ok | {error, not_found}.  Stop a previously started listener.
+Alias of ranch:stop_listener(3).
+Arguments Name The name of the listener to be stopped.
+The name of the listener is the first argument given to the cowboy:start_clear(3), cowboy:start_tls(3) or ranch:start_listener(3) function.
+  Return value The atom ok is returned on success.
+The {error, not_found} tuple is returned when the listener does not exist.</description>
+    </item>
+    
     <item>
       <title>cowboy:stop_listener(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.stop_listener/</link>
@@ -5408,6 +5952,17 @@ Description The module cowboy_compress_h compresses response bodies automaticall
 Normal responses will only be compressed when their size is lower than the configured threshold. Streamed responses are always compressed, including when the sendfile command is used. Because the file must be read in memory to be compressed, this module is not suitable for automatically compressing large files.</description>
     </item>
     
+    <item>
+      <title>cowboy_compress_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_compress_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_compress_h/</guid>
+      <description>Name cowboy_compress_h - Compress stream handler
+Description The module cowboy_compress_h compresses response bodies automatically when the client supports it. It will not try to compress responses that already have a content encoding or that have an etag header defined.
+Normal responses will only be compressed when their size is lower than the configured threshold. Streamed responses are always compressed, including when the sendfile command is used. Because the file must be read in memory to be compressed, this module is not suitable for automatically compressing large files.</description>
+    </item>
+    
     <item>
       <title>cowboy_compress_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_compress_h/</link>
@@ -5491,6 +6046,19 @@ Exports Built-in constraints:
 cowboy_constraints:int(3) - Integer constraint  cowboy_constraints:nonempty(3) - Non-empty constraint   Types constraint() constraint() :: int | nonempty | fun()  A constraint function.</description>
     </item>
     
+    <item>
+      <title>cowboy_constraints(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints/</guid>
+      <description>Name cowboy_constraints - Constraints
+Description The module cowboy_constraints defines the built-in constraints in Cowboy and provides an interface for manipulating these constraints.
+Constraints are functions that define what type of input is allowed. They are used throughout Cowboy, from the router to query strings to cookies.
+Exports Built-in constraints:
+cowboy_constraints:int(3) - Integer constraint  cowboy_constraints:nonempty(3) - Non-empty constraint   Types constraint() constraint() :: int | nonempty | fun()  A constraint function.</description>
+    </item>
+    
     <item>
       <title>cowboy_constraints(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints/</link>
@@ -5582,6 +6150,19 @@ int(reverse, Int) -&amp;gt; {ok, Bin} | {error, not_an_integer}  Convert an inte
 int(format_error, Error) -&amp;gt; HumanReadable Error :: {not_an_integer, Bin | Int} HumanReadable :: iolist()  Generate a human-readable error message.</description>
     </item>
     
+    <item>
+      <title>cowboy_constraints:int(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.int/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.int/</guid>
+      <description>Name cowboy_constraints:int - Integer constraint
+Description Constraint functions implement a number of different operations.
+int(forward, Bin) -&amp;gt; {ok, Int} | {error, not_an_integer} Bin :: binary() Int :: integer()  Validate and convert the text representation of an integer.
+int(reverse, Int) -&amp;gt; {ok, Bin} | {error, not_an_integer}  Convert an integer back to its text representation.
+int(format_error, Error) -&amp;gt; HumanReadable Error :: {not_an_integer, Bin | Int} HumanReadable :: iolist()  Generate a human-readable error message.</description>
+    </item>
+    
     <item>
       <title>cowboy_constraints:int(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints.int/</link>
@@ -5676,6 +6257,20 @@ nonempty(format_error, Error) -&amp;gt; HumanReadable Error :: {empty, Bin} Huma
 Arguments Arguments vary depending on the operation. Constraint functions always take the operation type as first argument, and the value as second argument.</description>
     </item>
     
+    <item>
+      <title>cowboy_constraints:nonempty(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/</guid>
+      <description>Name cowboy_constraints:nonempty - Non-empty constraint
+Description Constraint functions implement a number of different operations.
+nonempty(forward | reverse, &amp;lt;&amp;lt;&amp;gt;&amp;gt;) -&amp;gt; {error, empty}  Reject empty values.
+nonempty(forward | reverse, Bin) -&amp;gt; {ok, Bin} Bin :: binary()  Accept any other binary values.
+nonempty(format_error, Error) -&amp;gt; HumanReadable Error :: {empty, Bin} HumanReadable :: iolist()  Generate a human-readable error message.
+Arguments Arguments vary depending on the operation. Constraint functions always take the operation type as first argument, and the value as second argument.</description>
+    </item>
+    
     <item>
       <title>cowboy_constraints:nonempty(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints.nonempty/</link>
@@ -5756,6 +6351,18 @@ The only compression algorithm currently supported is the gzip algorithm. Anothe
 This stream handler always adds a field to the Req object with the name content_decoded which is treated as a list of decoded content-encoding values.</description>
     </item>
     
+    <item>
+      <title>cowboy_decompress_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_decompress_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_decompress_h/</guid>
+      <description>Name cowboy_decompress_h - Decompress stream handler
+Description The module cowboy_decompress_h decompresses request bodies automatically when the server supports it.
+The only compression algorithm currently supported is the gzip algorithm. Another limitation is that decompression is only attempted when gzip is the only content-encoding in the request.
+This stream handler always adds a field to the Req object with the name content_decoded which is treated as a list of decoded content-encoding values.</description>
+    </item>
+    
     <item>
       <title>cowboy_handler(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy_handler/</link>
@@ -5792,6 +6399,18 @@ This middleware takes the handler module and initial state from the handler and
 This module also defines a callback interface for handling HTTP requests.</description>
     </item>
     
+    <item>
+      <title>cowboy_handler(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler/</guid>
+      <description>Name cowboy_handler - Plain HTTP handlers
+Description The cowboy_handler middleware executes the handler selected by the router or any other preceding middleware.
+This middleware takes the handler module and initial state from the handler and handler_opts environment values, respectively. On completion, it adds a result value to the middleware environment, containing the return value of the terminate/3 callback (if defined) and ok otherwise.
+This module also defines a callback interface for handling HTTP requests.</description>
+    </item>
+    
     <item>
       <title>cowboy_handler(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler/</link>
@@ -5882,6 +6501,20 @@ Arguments Reason Reason for termination.
 It is possible to remove fields from the Req object to save memory when the handler has no concept of requests/responses.</description>
     </item>
     
+    <item>
+      <title>cowboy_handler:terminate(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/</guid>
+      <description>Name cowboy_handler:terminate - Terminate the handler
+Description terminate(Reason, PartialReq, State, Handler) -&amp;gt; ok Reason :: any() PartialReq :: map() State :: any() Handler :: module()  Call the optional terminate callback if it is defined.
+Make sure to use this function at the end of the execution of modules that implement custom handler behaviors.
+Arguments Reason Reason for termination.
+ PartialReq The Req object.
+It is possible to remove fields from the Req object to save memory when the handler has no concept of requests/responses.</description>
+    </item>
+    
     <item>
       <title>cowboy_handler:terminate(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler.terminate/</link>
@@ -5971,6 +6604,17 @@ Description The module cowboy_http implements HTTP/1.1 and HTTP/1.0 as a Ranch p
 Options opts() :: #{ active_n =&amp;gt; pos_integer(), chunked =&amp;gt; boolean(), connection_type =&amp;gt; worker | supervisor, http10_keepalive =&amp;gt; boolean(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_stream_flow_size =&amp;gt; non_neg_integer(), linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_empty_lines =&amp;gt; non_neg_integer(), max_header_name_length =&amp;gt; non_neg_integer(), max_header_value_length =&amp;gt; non_neg_integer(), max_headers =&amp;gt; non_neg_integer(), max_keepalive =&amp;gt; non_neg_integer(), max_method_length =&amp;gt; non_neg_integer(), max_request_line_length =&amp;gt; non_neg_integer(), max_skip_body_length =&amp;gt; non_neg_integer(), proxy_header =&amp;gt; boolean(), request_timeout =&amp;gt; timeout(), reset_idle_timeout_on_send =&amp;gt; boolean(), sendfile =&amp;gt; boolean(), stream_handlers =&amp;gt; [module()] }  Configuration for the HTTP/1.</description>
     </item>
     
+    <item>
+      <title>cowboy_http(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http/</guid>
+      <description>Name cowboy_http - HTTP/1.1
+Description The module cowboy_http implements HTTP/1.1 and HTTP/1.0 as a Ranch protocol.
+Options opts() :: #{ active_n =&amp;gt; pos_integer(), alpn_default_protocol =&amp;gt; http | http2, chunked =&amp;gt; boolean(), connection_type =&amp;gt; worker | supervisor, dynamic_buffer =&amp;gt; false | {pos_integer(), pos_integer()}, hibernate =&amp;gt; boolean(), http10_keepalive =&amp;gt; boolean(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_stream_flow_size =&amp;gt; non_neg_integer(), linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_empty_lines =&amp;gt; non_neg_integer(), max_header_name_length =&amp;gt; non_neg_integer(), max_header_value_length =&amp;gt; non_neg_integer(), max_headers =&amp;gt; non_neg_integer(), max_keepalive =&amp;gt; non_neg_integer(), max_method_length =&amp;gt; non_neg_integer(), max_request_line_length =&amp;gt; non_neg_integer(), max_skip_body_length =&amp;gt; non_neg_integer(), protocols =&amp;gt; [http | http2], proxy_header =&amp;gt; boolean(), request_timeout =&amp;gt; timeout(), reset_idle_timeout_on_send =&amp;gt; boolean(), sendfile =&amp;gt; boolean(), stream_handlers =&amp;gt; [module()] }  Configuration for the HTTP/1.</description>
+    </item>
+    
     <item>
       <title>cowboy_http(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_http/</link>
@@ -6048,6 +6692,17 @@ Description The module cowboy_http2 implements HTTP/2 as a Ranch protocol.
 Options opts() :: #{ active_n =&amp;gt; pos_integer(), connection_type =&amp;gt; worker | supervisor, connection_window_margin_size =&amp;gt; 0..16#7fffffff, connection_window_update_threshold =&amp;gt; 0..16#7fffffff, enable_connect_protocol =&amp;gt; boolean(), goaway_initial_timeout =&amp;gt; timeout(), goaway_complete_timeout =&amp;gt; timeout(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_connection_window_size =&amp;gt; 65535..16#7fffffff, initial_stream_window_size =&amp;gt; 0..16#7fffffff, linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_concurrent_streams =&amp;gt; non_neg_integer() | infinity, max_connection_buffer_size =&amp;gt; non_neg_integer(), max_connection_window_size =&amp;gt; 0..16#7fffffff, max_decode_table_size =&amp;gt; non_neg_integer(), max_encode_table_size =&amp;gt; non_neg_integer(), max_fragmented_header_block_size =&amp;gt; 16384.</description>
     </item>
     
+    <item>
+      <title>cowboy_http2(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http2/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http2/</guid>
+      <description>Name cowboy_http2 - HTTP/2
+Description The module cowboy_http2 implements HTTP/2 as a Ranch protocol.
+Options opts() :: #{ active_n =&amp;gt; pos_integer(), alpn_default_protocol =&amp;gt; http | http2, connection_type =&amp;gt; worker | supervisor, connection_window_margin_size =&amp;gt; 0..16#7fffffff, connection_window_update_threshold =&amp;gt; 0..16#7fffffff, dynamic_buffer =&amp;gt; false | {pos_integer(), pos_integer()}, enable_connect_protocol =&amp;gt; boolean(), goaway_initial_timeout =&amp;gt; timeout(), goaway_complete_timeout =&amp;gt; timeout(), hibernate =&amp;gt; boolean(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_connection_window_size =&amp;gt; 65535..16#7fffffff, initial_stream_window_size =&amp;gt; 0..16#7fffffff, linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_concurrent_streams =&amp;gt; non_neg_integer() | infinity, max_connection_buffer_size =&amp;gt; non_neg_integer(), max_connection_window_size =&amp;gt; 0.</description>
+    </item>
+    
     <item>
       <title>cowboy_http2(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_http2/</link>
@@ -6131,6 +6786,19 @@ There are generally two usage patterns:
 Loop until receiving a specific message, then send a response and stop execution (for example long polling);  Or initiate a response in init/2 and stream the body in info/3 as necessary (for example server-sent events).</description>
     </item>
     
+    <item>
+      <title>cowboy_loop(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_loop/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_loop/</guid>
+      <description>Name cowboy_loop - Loop handlers
+Description The module cowboy_loop defines a callback interface for long running HTTP connections.
+You should switch to this behavior for long polling, server-sent events and similar long-running requests.
+There are generally two usage patterns:
+Loop until receiving a specific message, then send a response and stop execution (for example long polling);  Or initiate a response in init/2 and stream the body in info/3 as necessary (for example server-sent events).</description>
+    </item>
+    
     <item>
       <title>cowboy_loop(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_loop/</link>
@@ -6216,6 +6884,17 @@ Description The module cowboy_metrics_h gathers metrics and other information ab
 Types metrics() metrics() :: #{ %% The identifier for this listener. ref := ranch:ref(), %% The pid for this connection. pid := pid(), %% The streamid also indicates the total number of requests on %% this connection (StreamID div 2 + 1). streamid := cowboy_stream:streamid(), %% The terminate reason is always useful.</description>
     </item>
     
+    <item>
+      <title>cowboy_metrics_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_metrics_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_metrics_h/</guid>
+      <description>Name cowboy_metrics_h - Metrics stream handler
+Description The module cowboy_metrics_h gathers metrics and other information about a stream. It then calls the configured callback with this data.
+Types metrics() metrics() :: #{ %% The identifier for this listener. ref := ranch:ref(), %% The pid for this connection. pid := pid(), %% The streamid also indicates the total number of requests on %% this connection (StreamID div 2 + 1). streamid := cowboy_stream:streamid(), %% The terminate reason is always useful.</description>
+    </item>
+    
     <item>
       <title>cowboy_metrics_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_metrics_h/</link>
@@ -6288,6 +6967,19 @@ Callbacks Middlewares implement the following interface:
 execute(Req, Env) -&amp;gt; {ok, Req, Env} | {suspend, module(), atom(), [any()]} | {stop, Req} Req :: cowboy_req:req() Env :: cowboy_middleware:env()  The execute/2 is the only callback that needs to be implemented. It must execute the middleware and return with instructions for Cowboy.</description>
     </item>
     
+    <item>
+      <title>cowboy_middleware(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_middleware/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_middleware/</guid>
+      <description>Name cowboy_middleware - Middlewares
+Description The module cowboy_middleware defines a callback interface for Cowboy middlewares.
+Middlewares process the request sequentially in the order they are configured.
+Callbacks Middlewares implement the following interface:
+execute(Req, Env) -&amp;gt; {ok, Req, Env} | {suspend, module(), atom(), [any()]} | {stop, Req} Req :: cowboy_req:req() Env :: cowboy_middleware:env()  The execute/2 is the only callback that needs to be implemented. It must execute the middleware and return with instructions for Cowboy.</description>
+    </item>
+    
     <item>
       <title>cowboy_middleware(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_middleware/</link>
@@ -6376,6 +7068,18 @@ There are four types of functions in this module. They can be differentiated by
 Type Name pattern Return type access no verb, parse_*, match_* Value  question has_* boolean()  modification set_* Req  action any other verb ok | {Result, Value, Req}   Any Req returned must be used in place of the one passed as argument.</description>
     </item>
     
+    <item>
+      <title>cowboy_req(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req/</guid>
+      <description>Name cowboy_req - HTTP request and response
+Description The module cowboy_req provides functions to access, manipulate and respond to requests.
+There are four types of functions in this module. They can be differentiated by their name and their return type:
+Type Name pattern Return type access no verb, parse_*, match_* Value  question has_* boolean()  modification set_* Req  action any other verb ok | {Result, Value, Req}   Any Req returned must be used in place of the one passed as argument.</description>
+    </item>
+    
     <item>
       <title>cowboy_req(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req/</link>
@@ -6466,6 +7170,20 @@ Arguments Name Desired binding name as an atom.
   Return value By default the value is a case sensitive binary string, however constraints may change the type of this value (for example automatically converting numbers to integer).</description>
     </item>
     
+    <item>
+      <title>cowboy_req:binding(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.binding/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.binding/</guid>
+      <description>Name cowboy_req:binding - Access a value bound from the route
+Description binding(Name, Req) -&amp;gt; binding(Name, Req, undefined) binding(Name, Req, Default) -&amp;gt; any() | Default Name :: atom() Req :: cowboy_req:req() Default :: any()  Return the value for the given binding.
+Arguments Name Desired binding name as an atom.
+ Req The Req object.
+ Default Default value returned when the binding is missing.
+  Return value By default the value is a case sensitive binary string, however constraints may change the type of this value (for example automatically converting numbers to integer).</description>
+    </item>
+    
     <item>
       <title>cowboy_req:binding(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.binding/</link>
@@ -6561,6 +7279,19 @@ Arguments Req The Req object.
 Changelog 2.0: Only the values are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:bindings(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.bindings/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.bindings/</guid>
+      <description>Name cowboy_req:bindings - Access all values bound from the route
+Description bindings(Req :: cowboy_req:req()) -&amp;gt; cowboy_router:bindings()  Return a map containing all bindings.
+Arguments Req The Req object.
+  Return value By default values are case sensitive binary strings, however constraints may change the type of this value (for example automatically converting numbers to integer).
+Changelog 2.0: Only the values are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:bindings(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.bindings/</link>
@@ -6652,6 +7383,19 @@ Arguments Req The Req object.
   Return value The length of the request body, or undefined if it is not known.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:body_length(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.body_length/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.body_length/</guid>
+      <description>Name cowboy_req:body_length - Body length
+Description body_length(Req :: cowboy_req:req()) -&amp;gt; undefined | non_neg_integer()  Return the length of the request body.
+The length is not always known before reading the body. In those cases Cowboy will return undefined. The body length is available after the body has been fully read.
+Arguments Req The Req object.
+  Return value The length of the request body, or undefined if it is not known.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:body_length(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.body_length/</link>
@@ -6749,6 +7493,21 @@ Arguments Event The event to be sent to stream handlers.
 Changelog 2.7: Function introduced.   Examples Read the body using auto mode read_body_auto_async(Req) -&amp;gt; read_body_auto_async(Req, make_ref(), &amp;lt;&amp;lt;&amp;gt;&amp;gt;).</description>
     </item>
     
+    <item>
+      <title>cowboy_req:cast(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cast/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cast/</guid>
+      <description>Name cowboy_req:cast - Cast a stream handler event
+Description cast(Event :: any(), Req :: cowboy_req:req()) -&amp;gt; ok  Cast a stream handler event.
+The event will be passed to stream handlers through the info/3 callback.
+Arguments Event The event to be sent to stream handlers.
+ Req The Req object.
+  Return value The atom ok is always returned. It can be safely ignored.
+Changelog 2.7: Function introduced.   Examples Read the body using auto mode read_body_auto_async(Req) -&amp;gt; read_body_auto_async(Req, make_ref(), &amp;lt;&amp;lt;&amp;gt;&amp;gt;).</description>
+    </item>
+    
     <item>
       <title>cowboy_req:cast(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_req.cast/</link>
@@ -6830,6 +7589,18 @@ Using the default configuration this function will always return undefined. You
 {ok, _} = cowboy:start_tls(example, [ {port, 8443}, {certfile, &#34;path/to/cert.pem&#34;}, {verify, verify_peer} ], #{ env =&amp;gt; #{dispatch =&amp;gt; Dispatch} }).</description>
     </item>
     
+    <item>
+      <title>cowboy_req:cert(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cert/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cert/</guid>
+      <description>Name cowboy_req:cert - Client TLS certificate
+Description cert(Req :: cowboy_req:req()) -&amp;gt; binary() | undefined  Return the peer&amp;apos;s TLS certificate.
+Using the default configuration this function will always return undefined. You need to explicitly configure Cowboy to request the client certificate. To do this you need to set the verify transport option to verify_peer:
+{ok, _} = cowboy:start_tls(example, [ {port, 8443}, {certfile, &#34;path/to/cert.pem&#34;}, {verify, verify_peer} ], #{ env =&amp;gt; #{dispatch =&amp;gt; Dispatch} }).</description>
+    </item>
+    
     <item>
       <title>cowboy_req:cert(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.cert/</link>
@@ -6920,6 +7691,20 @@ Arguments Name Header name as a lowercase binary string.
   Return value A new Req object is returned.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:delete_resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/</guid>
+      <description>Name cowboy_req:delete_resp_header - Delete a response header
+Description delete_resp_header(Name, Req :: cowboy_req:req()) -&amp;gt; Req Name :: binary() %% lowercase; case insensitive  Delete the given response header.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Arguments Name Header name as a lowercase binary string.
+ Req The Req object.
+  Return value A new Req object is returned.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:delete_resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.delete_resp_header/</link>
@@ -7012,6 +7797,18 @@ This function is meant to be used before attempting to parse or match cookies in
 Malformed cookies are unfortunately fairly common due to the string-based interface provided by browsers and this function provides a middle ground between Cowboy&amp;apos;s strict behavior and chaotic real world use cases.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:filter_cookies(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/</guid>
+      <description>Name cowboy_req:filter_cookies - Filter cookie headers
+Description filter_cookies(Names, Req) -&amp;gt; Req Names :: [atom() | binary()]  Filter cookie headers.
+This function is meant to be used before attempting to parse or match cookies in order to remove cookies that are not relevant and are potentially malformed. Because Cowboy by default crashes on malformed cookies, this function allows processing requests that would otherwise result in a 400 error.
+Malformed cookies are unfortunately fairly common due to the string-based interface provided by browsers and this function provides a middle ground between Cowboy&amp;apos;s strict behavior and chaotic real world use cases.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:filter_cookies(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_req.filter_cookies/</link>
@@ -7087,6 +7884,19 @@ Arguments Req The Req object.
 Changelog 1.0: Function introduced.   Examples Ensure the request has a body true = cowboy_req:has_body(Req).  See also cowboy_req(3), cowboy_req:body_length(3), cowboy_req:read_body(3), cowboy_req:read_urlencoded_body(3), cowboy_req:read_part(3), cowboy_req:read_part_body(3)</description>
     </item>
     
+    <item>
+      <title>cowboy_req:has_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_body/</guid>
+      <description>Name cowboy_req:has_body - Is there a request body?
+Description has_body(Req :: cowboy_req:req()) -&amp;gt; boolean()  Return whether the request has a body.
+Arguments Req The Req object.
+  Return value A boolean indicating whether the request has a body.
+Changelog 1.0: Function introduced.   Examples Ensure the request has a body true = cowboy_req:has_body(Req).  See also cowboy_req(3), cowboy_req:body_length(3), cowboy_req:read_body(3), cowboy_req:read_urlencoded_body(3), cowboy_req:read_part(3), cowboy_req:read_part_body(3)</description>
+    </item>
+    
     <item>
       <title>cowboy_req:has_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_body/</link>
@@ -7181,6 +7991,20 @@ This function will return false when an empty response body has been set.
 Changelog 1.0: Function introduced.   Examples Check whether a body has been set false = cowboy_req:has_resp_body(Req0), Req1 = cowboy_req:set_resp_body(&amp;lt;&amp;lt;&#34;</description>
     </item>
     
+    <item>
+      <title>cowboy_req:has_resp_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/</guid>
+      <description>Name cowboy_req:has_resp_body - Is there a response body?
+Description has_resp_body(Req :: cowboy_req:req()) -&amp;gt; boolean()  Return whether a response body has been set.
+Arguments Req The Req object.
+  Return value A boolean indicating whether a response body has been set.
+This function will return false when an empty response body has been set.
+Changelog 1.0: Function introduced.   Examples Check whether a body has been set false = cowboy_req:has_resp_body(Req0), Req1 = cowboy_req:set_resp_body(&amp;lt;&amp;lt;&#34;</description>
+    </item>
+    
     <item>
       <title>cowboy_req:has_resp_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_body/</link>
@@ -7273,6 +8097,18 @@ The header name must be given as a lowercase binary string. While header names a
 Arguments Name Header name as a lowercase binary string.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:has_resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/</guid>
+      <description>Name cowboy_req:has_resp_header - Is the given response header set?
+Description has_resp_header(Name, Req :: cowboy_req:req()) -&amp;gt; boolean() Name :: binary() %% lowercase; case insensitive  Return whether the given response header has been set.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Arguments Name Header name as a lowercase binary string.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:has_resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_header/</link>
@@ -7357,6 +8193,18 @@ The header name must be given as a lowercase binary string. While header names a
 Headers can also be obtained using pattern matching:</description>
     </item>
     
+    <item>
+      <title>cowboy_req:header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.header/</guid>
+      <description>Name cowboy_req:header - HTTP header
+Description header(Name, Req) -&amp;gt; header(Name, Req, undefined) header(Name, Req, Default) -&amp;gt; binary() | Default Name :: binary() %% lowercase; case insensitive Req :: cowboy_req:req() Default :: any()  Return the value for the given HTTP header.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Headers can also be obtained using pattern matching:</description>
+    </item>
+    
     <item>
       <title>cowboy_req:header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.header/</link>
@@ -7447,6 +8295,20 @@ Request headers can also be obtained using pattern matching:
 Changelog 2.0: Only the headers are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:headers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.headers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.headers/</guid>
+      <description>Name cowboy_req:headers - HTTP headers
+Description headers(Req :: cowboy_req:req()) -&amp;gt; cowboy:http_headers()  Return all request headers.
+Request headers can also be obtained using pattern matching:
+#{headers := Headers} = Req.  Arguments Req The Req object.
+  Return value Headers are returned as a map with keys being lowercase binary strings, and values as binary strings.
+Changelog 2.0: Only the headers are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:headers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.headers/</link>
@@ -7522,7 +8384,21 @@ Changelog 2.0: Only the host name is returned, it is no longer wrapped in a tupl
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.host/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.host/</guid>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.host/</guid>
+      <description>Name cowboy_req:host - URI host name
+Description host(Req :: cowboy_req:req()) -&amp;gt; Host :: binary()  Return the host name of the effective request URI.
+The host name can also be obtained using pattern matching:
+#{host := Host} = Req.  Arguments Req The Req object.
+  Return value The host name is returned as a lowercase binary string. It is case insensitive.
+Changelog 2.0: Only the host name is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
+    <item>
+      <title>cowboy_req:host(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.host/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.host/</guid>
       <description>Name cowboy_req:host - URI host name
 Description host(Req :: cowboy_req:req()) -&amp;gt; Host :: binary()  Return the host name of the effective request URI.
 The host name can also be obtained using pattern matching:
@@ -7533,10 +8409,10 @@ Changelog 2.0: Only the host name is returned, it is no longer wrapped in a tupl
     
     <item>
       <title>cowboy_req:host(3)</title>
-      <link>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.host/</link>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.host/</guid>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host/</guid>
       <description>Name cowboy_req:host - URI host name
 Description host(Req :: cowboy_req:req()) -&amp;gt; Host :: binary()  Return the host name of the effective request URI.
 The host name can also be obtained using pattern matching:
@@ -7643,6 +8519,20 @@ Arguments Req The Req object.
 Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:host_info(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host_info/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host_info/</guid>
+      <description>Name cowboy_req:host_info - Access the route&amp;apos;s heading host segments
+Description host_info(Req :: cowboy_req:req()) -&amp;gt; cowboy_router:tokens()  Return the tokens for the heading host segments.
+This is the part of the host name that was matched using the ... notation.
+Arguments Req The Req object.
+  Return value The tokens are returned as a list of case insensitive binary strings.
+Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:host_info(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.host_info/</link>
@@ -7735,6 +8625,18 @@ Informational responses use a status code between 100 and 199. They cannot inclu
 Any number of informational responses can be sent as long as they are sent before the proper response.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:inform(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.inform/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.inform/</guid>
+      <description>Name cowboy_req:inform - Send an informational response
+Description inform(Status, Req :: cowboy_req:req()) -&amp;gt; inform(StatusCode, #{}, Req) inform(Status, Headers, Req :: cowboy_req:req()) -&amp;gt; ok Status :: cowboy:http_status() Headers :: cowboy:http_headers()  Send an informational response.
+Informational responses use a status code between 100 and 199. They cannot include a body. This function will not use any of the previously set headers. All headers to be sent must be given directly.
+Any number of informational responses can be sent as long as they are sent before the proper response.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:inform(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.inform/</link>
@@ -7816,6 +8718,17 @@ Description match_cookies(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&
 Cowboy will only return the cookie values specified in the fields list, and ignore all others. Fields can be either the name of the cookie requested; the name along with a list of constraints; or the name, a list of constraints and a default value in case the cookie is missing.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:match_cookies(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/</guid>
+      <description>Name cowboy_req:match_cookies - Match cookies against constraints
+Description match_cookies(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&amp;gt; #{atom() =&amp;gt; any()}  Parse the cookies and match specific values against constraints.
+Cowboy will only return the cookie values specified in the fields list, and ignore all others. Fields can be either the name of the cookie requested; the name along with a list of constraints; or the name, a list of constraints and a default value in case the cookie is missing.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:match_cookies(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.match_cookies/</link>
@@ -7893,6 +8806,17 @@ Description match_qs(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&amp;g
 Cowboy will only return the query string values specified in the fields list, and ignore all others. Fields can be either the key requested; the key along with a list of constraints; or the key, a list of constraints and a default value in case the key is missing.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:match_qs(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/</guid>
+      <description>Name cowboy_req:match_qs - Match the query string against constraints
+Description match_qs(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&amp;gt; #{atom() =&amp;gt; any()}  Parse the query string and match specific values against constraints.
+Cowboy will only return the query string values specified in the fields list, and ignore all others. Fields can be either the key requested; the key along with a list of constraints; or the key, a list of constraints and a default value in case the key is missing.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:match_qs(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.match_qs/</link>
@@ -7979,6 +8903,20 @@ The method can also be obtained using pattern matching:
 Changelog 2.0: Only the method is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:method(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.method/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.method/</guid>
+      <description>Name cowboy_req:method - HTTP method
+Description method(Req :: cowboy_req:req()) -&amp;gt; Method :: binary()  Return the request&amp;apos;s HTTP method.
+The method can also be obtained using pattern matching:
+#{method := Method} = Req.  Arguments Req The Req object.
+  Return value The request&amp;apos;s HTTP method is returned as a binary string. While methods are case sensitive, standard methods are always uppercase.
+Changelog 2.0: Only the method is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:method(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.method/</link>
@@ -8074,6 +9012,19 @@ When the cookie header is missing or empty, [] is returned.
 This function will crash on invalid cookie data. Because invalid cookies are fairly common when dealing with browsers (because of the string interface that the Javascript API provides), it is recommended to filter the cookie header value before attempting to parse it.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:parse_cookies(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/</guid>
+      <description>Name cowboy_req:parse_cookies - Parse cookie headers
+Description parse_cookies(Req) -&amp;gt; [{Name, Value}] Name :: binary() %% case sensitive Value :: binary() %% case sensitive  Parse cookie headers.
+Alias for cowboy_req:parse_header(&amp;lt;&amp;lt;&amp;quot;cookie&amp;quot;&amp;gt;&amp;gt;, Req).
+When the cookie header is missing or empty, [] is returned.
+This function will crash on invalid cookie data. Because invalid cookies are fairly common when dealing with browsers (because of the string interface that the Javascript API provides), it is recommended to filter the cookie header value before attempting to parse it.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:parse_cookies(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_cookies/</link>
@@ -8164,6 +9115,18 @@ The header name must be given as a lowercase binary string. While header names a
 The type of the parsed value varies depending on the header.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:parse_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/</guid>
+      <description>Name cowboy_req:parse_header - Parse the given HTTP header
+Description parse_header(Name, Req) -&amp;gt; ParsedValue | Default parse_header(Name, Req, Default) -&amp;gt; ParsedValue | Default Name :: binary() Req :: cowboy_req:req() ParsedValue :: any() Default :: any()  Parse the given HTTP header.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+The type of the parsed value varies depending on the header.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:parse_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_header/</link>
@@ -8248,6 +9211,18 @@ Arguments Req The Req object.
   Return value The parsed query string is returned as a list of key/value pairs. The key is a binary string. The value is either a binary string, or the atom true. Both key and value are case sensitive.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:parse_qs(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/</guid>
+      <description>Name cowboy_req:parse_qs - Parse the query string
+Description parse_qs(Req :: cowboy_req:req()) -&amp;gt; [{Key :: binary(), Value :: binary() | true}]  Parse the query string as a list of key/value pairs.
+Arguments Req The Req object.
+  Return value The parsed query string is returned as a list of key/value pairs. The key is a binary string. The value is either a binary string, or the atom true. Both key and value are case sensitive.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:parse_qs(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_qs/</link>
@@ -8338,6 +9313,20 @@ The path can also be obtained using pattern matching:
 Changelog 2.0: Only the path is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:path(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path/</guid>
+      <description>Name cowboy_req:path - URI path
+Description path(Req :: cowboy_req:req()) -&amp;gt; Path :: binary()  Return the path of the effective request URI.
+The path can also be obtained using pattern matching:
+#{path := Path} = Req.  Arguments Req The Req object.
+  Return value The path is returned as a binary string. It is case sensitive.
+Changelog 2.0: Only the path is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:path(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.path/</link>
@@ -8436,6 +9425,20 @@ Arguments Req The Req object.
 Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:path_info(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path_info/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path_info/</guid>
+      <description>Name cowboy_req:path_info - Access the route&amp;apos;s trailing path segments
+Description path_info(Req :: cowboy_req:req()) -&amp;gt; cowboy_router:tokens()  Return the tokens for the trailing path segments.
+This is the part of the host name that was matched using the ... notation.
+Arguments Req The Req object.
+  Return value The tokens are returned as a list of case sensitive binary strings.
+Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:path_info(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.path_info/</link>
@@ -8534,6 +9537,20 @@ The peer information can also be obtained using pattern matching:
 The peer is not necessarily the client&amp;apos;s IP address and port. It is the IP address of the endpoint connecting directly to the server, which may be a gateway or a proxy.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:peer(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.peer/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.peer/</guid>
+      <description>Name cowboy_req:peer - Peer address and port
+Description peer(Req :: cowboy_req:req()) -&amp;gt; Info Info :: {inet:ip_address(), inet:port_number()}  Return the peer&amp;apos;s IP address and port number.
+The peer information can also be obtained using pattern matching:
+#{peer := {IP, Port}} = Req.  Arguments Req The Req object.
+  Return value The peer&amp;apos;s IP address and port number.
+The peer is not necessarily the client&amp;apos;s IP address and port. It is the IP address of the endpoint connecting directly to the server, which may be a gateway or a proxy.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:peer(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.peer/</link>
@@ -8629,6 +9646,19 @@ The port number can also be obtained using pattern matching:
 #{port := Port} = Req.  Arguments Req The Req object.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:port(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.port/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.port/</guid>
+      <description>Name cowboy_req:port - URI port number
+Description port(Req :: cowboy_req:req()) -&amp;gt; Port :: inet:port_number()  Return the port number of the effective request URI.
+Note that the port number returned by this function is obtained by parsing the host header. It may be different from the port the peer used to connect to Cowboy.
+The port number can also be obtained using pattern matching:
+#{port := Port} = Req.  Arguments Req The Req object.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:port(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.port/</link>
@@ -8714,6 +9744,17 @@ Description push(Path, Headers, Req :: cowboy_req:req()) -&amp;gt; push(Path, He
 Cowboy handles push requests the same way as if they came from the client, including the creation of a request handling process, routing and middlewares and so on.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:push(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.push/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.push/</guid>
+      <description>Name cowboy_req:push - Push a resource to the client
+Description push(Path, Headers, Req :: cowboy_req:req()) -&amp;gt; push(Path, Headers, Req, #{}) push(Path, Headers, Req :: cowboy_req:req(), Opts) -&amp;gt; ok Path :: iodata() %% case sensitive Headers :: cowboy:http_headers() Opts :: cowboy_req:push_opts()  Push a resource to the client.
+Cowboy handles push requests the same way as if they came from the client, including the creation of a request handling process, routing and middlewares and so on.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:push(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.push/</link>
@@ -8800,6 +9841,20 @@ The query string can also be obtained using pattern matching:
 Changelog 2.0: Only the query string is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:qs(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.qs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.qs/</guid>
+      <description>Name cowboy_req:qs - URI query string
+Description qs(Req :: cowboy_req:req()) -&amp;gt; Qs :: binary()  Return the query string of the effective request URI.
+The query string can also be obtained using pattern matching:
+#{qs := Qs} = Req.  Arguments Req The Req object.
+  Return value The query string is returned as a binary string. It is case sensitive.
+Changelog 2.0: Only the query string is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:qs(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.qs/</link>
@@ -8889,6 +9944,17 @@ Description read_and_match_urlencoded_body(Fields, Req) -&amp;gt; read_and_match
 This function reads the request body and parses it as application/x-www-form-urlencoded. It then applies the given field constraints to the urlencoded data and returns the result as a map.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_and_match_urlencoded_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/</guid>
+      <description>Name cowboy_req:read_and_match_urlencoded_body - Read, parse and match a urlencoded request body against constraints
+Description read_and_match_urlencoded_body(Fields, Req) -&amp;gt; read_and_match_urlencoded_body(Fields, Req, #{}) read_and_match_urlencoded_body(Fields, Req, Opts) -&amp;gt; {ok, Body, Req} Fields :: cowboy:fields() Req :: cowboy_req:req() Opts :: cowboy_req:read_body_opts() Body :: #{atom() =&amp;gt; any()}  Read, parse and match a urlencoded request body against constraints.
+This function reads the request body and parses it as application/x-www-form-urlencoded. It then applies the given field constraints to the urlencoded data and returns the result as a map.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_and_match_urlencoded_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_and_match_urlencoded_body/</link>
@@ -8966,6 +10032,17 @@ Description read_body(Req :: cowboy_req:req()) -&amp;gt; read_body(Req, #{}) rea
 This function reads a chunk of the request body. A more tuple is returned when more data remains to be read. Call the function repeatedly until an ok tuple is returned to read the entire body.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_body/</guid>
+      <description>Name cowboy_req:read_body - Read the request body
+Description read_body(Req :: cowboy_req:req()) -&amp;gt; read_body(Req, #{}) read_body(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Data :: binary(), Req} | {more, Data :: binary(), Req} Opts :: cowboy_req:read_body_opts()  Read the request body.
+This function reads a chunk of the request body. A more tuple is returned when more data remains to be read. Call the function repeatedly until an ok tuple is returned to read the entire body.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_body/</link>
@@ -9043,6 +10120,17 @@ Description read_part(Req :: cowboy_req:req()) -&amp;gt; read_part(Req, #{}) rea
 This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function parses and returns headers.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_part(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part/</guid>
+      <description>Name cowboy_req:read_part - Read the next multipart headers
+Description read_part(Req :: cowboy_req:req()) -&amp;gt; read_part(Req, #{}) read_part(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Headers, Req} | {done, Req} Opts :: cowboy_req:read_body_opts() Headers :: #{binary() =&amp;gt; binary()}  Read the next part of a multipart body.
+This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function parses and returns headers.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_part(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_part/</link>
@@ -9120,6 +10208,17 @@ Description read_part_body(Req :: cowboy_req:req()) -&amp;gt; read_part_body(Req
 This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function returns the body of the current part.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_part_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/</guid>
+      <description>Name cowboy_req:read_part_body - Read the current part&amp;apos;s body
+Description read_part_body(Req :: cowboy_req:req()) -&amp;gt; read_part_body(Req, #{}) read_part_body(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Data :: binary(), Req} | {more, Data :: binary(), Req} Opts :: cowboy_req:read_body_opts()  Read the body of the current part of the multipart message.
+This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function returns the body of the current part.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_part_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_part_body/</link>
@@ -9200,6 +10299,18 @@ This function reads the request body and parses it as application/x-www-form-url
 The urlencoded media type is used by Web browsers when submitting HTML forms using the POST method.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_urlencoded_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/</guid>
+      <description>Name cowboy_req:read_urlencoded_body - Read and parse a urlencoded request body
+Description read_urlencoded_body(Req :: cowboy_req:req()) -&amp;gt; read_urlencoded_body(Req, #{}) read_urlencoded_body(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Body, Req} Opts :: cowboy_req:read_body_opts() Body :: [{Key :: binary(), Value :: binary() | true}]  Read and parse a urlencoded request body.
+This function reads the request body and parses it as application/x-www-form-urlencoded. It returns a list of key/values.
+The urlencoded media type is used by Web browsers when submitting HTML forms using the POST method.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_urlencoded_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_urlencoded_body/</link>
@@ -9281,6 +10392,17 @@ Description reply(Status, Req :: cowboy_req:req()) -&amp;gt; reply(StatusCode, #
 The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:reply(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.reply/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.reply/</guid>
+      <description>Name cowboy_req:reply - Send the response
+Description reply(Status, Req :: cowboy_req:req()) -&amp;gt; reply(StatusCode, #{}, Req) reply(Status, Headers, Req :: cowboy_req:req()) -&amp;gt; Req reply(Status, Headers, Body, Req :: cowboy_req:req()) -&amp;gt; Req Status :: cowboy:http_status() Headers :: cowboy:http_headers() Body :: cowboy_req:resp_body()  Send the response.
+The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:reply(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.reply/</link>
@@ -9361,6 +10483,18 @@ The response header must have been set previously using cowboy_req:set_resp_head
 The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/</guid>
+      <description>Name cowboy_req:resp_header - Response header
+Description resp_header(Name, Req) -&amp;gt; resp_header(Name, Req, undefined) resp_header(Name, Req, Default) -&amp;gt; binary() | Default Name :: binary() %% lowercase; case insensitive Req :: cowboy_req:req() Default :: any()  Return the value for the given response header.
+The response header must have been set previously using cowboy_req:set_resp_header(3) or cowboy_req:set_resp_headers(3).
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.resp_header/</link>
@@ -9448,6 +10582,19 @@ Arguments Req The Req object.
 Changelog 2.0: Function introduced.   Examples Get all response headers Headers = cowboy_req:resp_headers(Req).  See also cowboy_req(3), cowboy_req:resp_header(3), cowboy_req:set_resp_header(3), cowboy_req:set_resp_headers(3)</description>
     </item>
     
+    <item>
+      <title>cowboy_req:resp_headers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/</guid>
+      <description>Name cowboy_req:resp_headers - Response headers
+Description resp_headers(Req :: cowboy_req:req()) -&amp;gt; cowboy:http_headers()  Return all response headers.
+Arguments Req The Req object.
+  Return value Headers are returned as a map with keys being lowercase binary strings, and values as binary strings.
+Changelog 2.0: Function introduced.   Examples Get all response headers Headers = cowboy_req:resp_headers(Req).  See also cowboy_req(3), cowboy_req:resp_header(3), cowboy_req:set_resp_header(3), cowboy_req:set_resp_headers(3)</description>
+    </item>
+    
     <item>
       <title>cowboy_req:resp_headers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.resp_headers/</link>
@@ -9545,6 +10692,21 @@ Cowboy will only set the scheme to &amp;lt;&amp;lt;&amp;quot;http&amp;quot;&amp;
 Changelog 2.0: Function introduced.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:scheme(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.scheme/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.scheme/</guid>
+      <description>Name cowboy_req:scheme - URI scheme
+Description scheme(Req :: cowboy_req:req()) -&amp;gt; Scheme :: binary()  Return the scheme of the effective request URI.
+The scheme can also be obtained using pattern matching:
+#{scheme := Scheme} = Req.  Arguments Req The Req object.
+  Return value The scheme is returned as a binary. It is case insensitive.
+Cowboy will only set the scheme to &amp;lt;&amp;lt;&amp;quot;http&amp;quot;&amp;gt;&amp;gt; or &amp;lt;&amp;lt;&amp;quot;https&amp;quot;&amp;gt;&amp;gt;.
+Changelog 2.0: Function introduced.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:scheme(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.scheme/</link>
@@ -9622,7 +10784,19 @@ This function can also be used to remove a response body that was set previously
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/</guid>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/</guid>
+      <description>Name cowboy_req:set_resp_body - Set the response body
+Description set_resp_body(Body, Req :: cowboy_req:req()) -&amp;gt; Req Body :: cowboy_req:resp_body()  Set the response body.
+The response body will be sent when a reply is initiated. Note that the functions stream_reply/2,3 and reply/4 will override the body set by this function.
+This function can also be used to remove a response body that was set previously. To do so, simply call this function with an empty body.</description>
+    </item>
+    
+    <item>
+      <title>cowboy_req:set_resp_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</guid>
       <description>Name cowboy_req:set_resp_body - Set the response body
 Description set_resp_body(Body, Req :: cowboy_req:req()) -&amp;gt; Req Body :: cowboy_req:resp_body()  Set the response body.
 The response body will be sent when a reply is initiated. Note that the functions stream_reply/2,3 and reply/4 will override the body set by this function.
@@ -9631,10 +10805,10 @@ This function can also be used to remove a response body that was set previously
     
     <item>
       <title>cowboy_req:set_resp_body(3)</title>
-      <link>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</link>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</guid>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/</guid>
       <description>Name cowboy_req:set_resp_body - Set the response body
 Description set_resp_body(Body, Req :: cowboy_req:req()) -&amp;gt; Req Body :: cowboy_req:resp_body()  Set the response body.
 The response body will be sent when a reply is initiated. Note that the functions stream_reply/2,3 and reply/4 will override the body set by this function.
@@ -9731,6 +10905,20 @@ Arguments Name Cookie name.
  Req The Req object.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:set_resp_cookie(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/</guid>
+      <description>Name cowboy_req:set_resp_cookie - Set a cookie
+Description set_resp_cookie(Name, Value, Req :: cowboy_req:req()) -&amp;gt; set_resp_cookie(Name, Value, Req, #{}) set_resp_cookie(Name, Value, Req :: cowboy_req:req(), Opts) -&amp;gt; Req Name :: binary() %% case sensitive Value :: iodata() %% case sensitive Opts :: cow_cookie:cookie_opts()  Set a cookie to be sent with the response.
+Note that cookie names are case sensitive.
+Arguments Name Cookie name.
+ Value Cookie value.
+ Req The Req object.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:set_resp_cookie(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_cookie/</link>
@@ -9823,6 +11011,18 @@ The header name must be given as a lowercase binary string. While header names a
 Cowboy does not allow duplicate header names.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:set_resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/</guid>
+      <description>Name cowboy_req:set_resp_header - Set a response header
+Description set_resp_header(Name, Value, Req :: cowboy_req:req()) -&amp;gt; Req Name :: binary() %% lowercase; case insensitive Value :: iodata() %% case depends on header  Set a header to be sent with the response.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Cowboy does not allow duplicate header names.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:set_resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_header/</link>
@@ -9907,6 +11107,18 @@ The header name must be given as a lowercase binary string. While header names a
 Cowboy does not allow duplicate header names. Headers set by this function may be overwritten by those set from the reply functions.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:set_resp_headers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/</guid>
+      <description>Name cowboy_req:set_resp_headers - Set several response headers
+Description set_resp_headers(Headers, Req :: cowboy_req:req()) -&amp;gt; Req Headers :: cowboy:http_headers() | [{binary(), iodata()}]  Set several headers to be sent with the response.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Cowboy does not allow duplicate header names. Headers set by this function may be overwritten by those set from the reply functions.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:set_resp_headers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_headers/</link>
@@ -9997,6 +11209,20 @@ The socket information can also be obtained using pattern matching:
 Changelog 2.1: Function introduced.   Examples Get the socket&amp;apos;s IP address and port number.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:sock(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.sock/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.sock/</guid>
+      <description>Name cowboy_req:sock - Socket address and port
+Description sock(Req :: cowboy_req:req()) -&amp;gt; Info Info :: {inet:ip_address(), inet:port_number()}  Return the socket&amp;apos;s IP address and port number.
+The socket information can also be obtained using pattern matching:
+#{sock := {IP, Port}} = Req.  Arguments Req The Req object.
+  Return value The socket&amp;apos;s local IP address and port number.
+Changelog 2.1: Function introduced.   Examples Get the socket&amp;apos;s IP address and port number.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:sock(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.sock/</link>
@@ -10089,6 +11315,18 @@ This function may be called as many times as needed after initiating a response
 The second argument indicates if this call is the final call. Use the nofin value until you know no more data will be sent. The final call should use fin (possibly with an empty data value) or be a call to the cowboy_req:stream_trailers(3) function.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/</guid>
+      <description>Name cowboy_req:stream_body - Stream the response body
+Description stream_body(Data, IsFin, Req :: cowboy_req:req()) -&amp;gt; ok Data :: cowboy_req:resp_body() IsFin :: fin | nofin  Stream the response body.
+This function may be called as many times as needed after initiating a response using the cowboy_req:stream_reply(3) function.
+The second argument indicates if this call is the final call. Use the nofin value until you know no more data will be sent. The final call should use fin (possibly with an empty data value) or be a call to the cowboy_req:stream_trailers(3) function.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_body/</link>
@@ -10170,6 +11408,17 @@ Description stream_events(Events, IsFin, Req :: cowboy_req:req()) -&amp;gt; ok E
 This function should only be used for text/event-stream responses when using server-sent events. Cowboy will automatically encode the given events to their text representation.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_events(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/</guid>
+      <description>Name cowboy_req:stream_events - Stream events
+Description stream_events(Events, IsFin, Req :: cowboy_req:req()) -&amp;gt; ok Events :: Event | [Event] IsFin :: fin | nofin Event :: #{ comment =&amp;gt; iodata(), data =&amp;gt; iodata(), event =&amp;gt; iodata() | atom(), id =&amp;gt; iodata(), retry =&amp;gt; non_neg_integer() }  Stream events.
+This function should only be used for text/event-stream responses when using server-sent events. Cowboy will automatically encode the given events to their text representation.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_events(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_events/</link>
@@ -10250,6 +11499,18 @@ The header names must be given as lowercase binary strings. While header names a
 Cowboy does not allow duplicate header names. Headers set by this function may overwrite those set by set_resp_header/3.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_reply(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/</guid>
+      <description>Name cowboy_req:stream_reply - Send the response headers
+Description stream_reply(Status, Req :: cowboy_req:req()) -&amp;gt; stream_reply(StatusCode, #{}, Req) stream_reply(Status, Headers, Req :: cowboy_req:req()) -&amp;gt; Req Status :: cowboy:http_status() Headers :: cowboy:http_headers()  Send the response headers.
+The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Cowboy does not allow duplicate header names. Headers set by this function may overwrite those set by set_resp_header/3.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_reply(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_reply/</link>
@@ -10334,6 +11595,18 @@ This function can only be called once, after initiating a response using cowboy_
 You must list all field names sent in trailers in the trailer header, otherwise they might be dropped by intermediaries or clients.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_trailers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/</guid>
+      <description>Name cowboy_req:stream_trailers - Send the response trailers
+Description stream_trailers(Trailers, Req :: cowboy_req:req()) -&amp;gt; ok Trailers :: cowboy:http_headers()  Send the response trailers and terminate the stream.
+This function can only be called once, after initiating a response using cowboy_req:stream_reply(3) and sending zero or more body chunks using cowboy_req:stream_body(3) with the nofin argument set. The function stream_trailers/2 implies fin and automatically terminate the response.
+You must list all field names sent in trailers in the trailer header, otherwise they might be dropped by intermediaries or clients.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_trailers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_trailers/</link>
@@ -10415,6 +11688,17 @@ Description uri(Req :: cowboy_req:req()) -&amp;gt; uri(Req, #{}) uri(Req :: cowb
 By default Cowboy will build a URI using the components found in the request.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:uri(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.uri/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.uri/</guid>
+      <description>Name cowboy_req:uri - Reconstructed URI
+Description uri(Req :: cowboy_req:req()) -&amp;gt; uri(Req, #{}) uri(Req :: cowboy_req:req(), Opts) -&amp;gt; URI :: iodata() Opts :: #{ scheme =&amp;gt; iodata() | undefined, host =&amp;gt; iodata() | undefined, port =&amp;gt; inet:port_number() | undefined, path =&amp;gt; iodata() | undefined, qs =&amp;gt; iodata() | undefined, fragment =&amp;gt; iodata() | undefined }  Reconstruct the effective request URI, optionally modifying components.
+By default Cowboy will build a URI using the components found in the request.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:uri(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.uri/</link>
@@ -10501,6 +11785,20 @@ The version can also be obtained using pattern matching:
 Changelog 2.0: Only the version is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:version(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.version/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.version/</guid>
+      <description>Name cowboy_req:version - HTTP version
+Description version(Req :: cowboy_req:req()) -&amp;gt; Version :: cowboy:http_version()  Return the HTTP version used for the request.
+The version can also be obtained using pattern matching:
+#{version := Version} = Req.  Arguments Req The Req object.
+  Return value The HTTP version used for the request is returned as an atom. It is provided for informative purposes only.
+Changelog 2.0: Only the version is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:version(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.version/</link>
@@ -10596,6 +11894,19 @@ Callbacks REST handlers implement the following interface:
 init(Req, State) -&amp;gt; {cowboy_rest, Req, State} Callback(Req, State) -&amp;gt; {Result, Req, State} | {stop, Req, State} | {{switch_handler, Module}, Req, State} | {{switch_handler, Module, Opts}, Req, State} terminate(Reason, Req, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() State :: any() Module :: module() Opts :: any() Reason :: normal | {crash, error | exit | throw, any()} Callback - see below Result - see below Default - see below  The init/2 callback is common to all handlers.</description>
     </item>
     
+    <item>
+      <title>cowboy_rest(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_rest/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_rest/</guid>
+      <description>Name cowboy_rest - REST handlers
+Description The module cowboy_rest implements the HTTP state machine.
+Implementing REST handlers is not enough to provide a REST interface; this interface must also follow the REST constraints including HATEOAS (hypermedia as the engine of application state).
+Callbacks REST handlers implement the following interface:
+init(Req, State) -&amp;gt; {cowboy_rest, Req, State} Callback(Req, State) -&amp;gt; {Result, Req, State} | {stop, Req, State} | {{switch_handler, Module}, Req, State} | {{switch_handler, Module, Opts}, Req, State} terminate(Reason, Req, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() State :: any() Module :: module() Opts :: any() Reason :: normal | {crash, error | exit | throw, any()} Callback - see below Result - see below Default - see below  The init/2 callback is common to all handlers.</description>
+    </item>
+    
     <item>
       <title>cowboy_rest(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_rest/</link>
@@ -10681,6 +11992,17 @@ Description The cowboy_router middleware maps the requested host and path to the
 The router takes the dispatch rules as input from the middleware environment. Dispatch rules are generated by calling the cowboy_router:compile(3) function. The environment can contain the rules directly or a tuple {persistent_term, Key}, in which case Cowboy will call persistent_term:get(Key) to retrieve the dispatch rules.</description>
     </item>
     
+    <item>
+      <title>cowboy_router(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router/</guid>
+      <description>Name cowboy_router - Router middleware
+Description The cowboy_router middleware maps the requested host and path to the handler to be used for processing the request.
+The router takes the dispatch rules as input from the middleware environment. Dispatch rules are generated by calling the cowboy_router:compile(3) function. The environment can contain the rules directly or a tuple {persistent_term, Key}, in which case Cowboy will call persistent_term:get(Key) to retrieve the dispatch rules.</description>
+    </item>
+    
     <item>
       <title>cowboy_router(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_router/</link>
@@ -10769,6 +12091,20 @@ Arguments Routes Human readable list of routes.
 Changelog 1.0: Function introduced.   Examples Compile routes and start a listener Dispatch = cowboy_router:compile([ {&#39;_&#39;, [ {&#34;</description>
     </item>
     
+    <item>
+      <title>cowboy_router:compile(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router.compile/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router.compile/</guid>
+      <description>Name cowboy_router:compile - Compile routes to the resources
+Description compile(cowboy_router:routes()) -&amp;gt; cowboy_router:dispatch_rules()  Compile routes to the resources.
+Takes a human readable list of routes and transforms it into a form more efficient to process.
+Arguments Routes Human readable list of routes.
+  Return value An opaque dispatch rules value is returned. This value must be given to Cowboy as a middleware environment value.
+Changelog 1.0: Function introduced.   Examples Compile routes and start a listener Dispatch = cowboy_router:compile([ {&#39;_&#39;, [ {&#34;</description>
+    </item>
+    
     <item>
       <title>cowboy_router:compile(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_router.compile/</link>
@@ -10861,6 +12197,18 @@ The static file handler is a pre-written handler coming with Cowboy. To serve fi
 Options opts() :: {priv_file, App, Path} | {priv_file, App, Path, Extra} | {file, Path} | {file, Path, Extra} | {priv_dir, App, Path} | {priv_dir, App, Path, Extra} | {dir, Path} | {dir, Path, Extra} App :: atom() Path :: binary() | string() Extra :: [Charset | Etag | Mimetypes] Charset :: {charset, module(), function()} | {charset, binary()} Etag :: {etag, module(), function()} | {etag, false} Mimetypes :: {mimetypes, module(), function()} | {mimetypes, binary() | ParsedMime} ParsedMime :: {Type :: binary(), SubType :: binary(), Params} Params :: [{Key :: binary(), Value :: binary()}]  Static handler configuration.</description>
     </item>
     
+    <item>
+      <title>cowboy_static(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_static/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_static/</guid>
+      <description>Name cowboy_static - Static file handler
+Description The module cowboy_static implements file serving capabilities using the REST semantics provided by cowboy_rest.
+The static file handler is a pre-written handler coming with Cowboy. To serve files, use it in your routes.
+Options opts() :: {priv_file, App, Path} | {priv_file, App, Path, Extra} | {file, Path} | {file, Path, Extra} | {priv_dir, App, Path} | {priv_dir, App, Path, Extra} | {dir, Path} | {dir, Path, Extra} App :: atom() Path :: binary() | string() Extra :: [Charset | Etag | Mimetypes] Charset :: {charset, module(), function()} | {charset, binary()} Etag :: {etag, module(), function()} | {etag, false} Mimetypes :: {mimetypes, module(), function()} | {mimetypes, binary() | ParsedMime} ParsedMime :: {Type :: binary(), SubType :: binary(), Params} Params :: [{Key :: binary(), Value :: binary()}]  Static handler configuration.</description>
+    </item>
+    
     <item>
       <title>cowboy_static(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_static/</link>
@@ -10948,6 +12296,19 @@ Cowboy calls the stream handler for nearly all events related to a stream. Excep
 Extra care must be taken when implementing stream handlers to ensure compatibility.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream/</guid>
+      <description>Name cowboy_stream - Stream handlers
+Description The module cowboy_stream defines a callback interface and a protocol for handling HTTP streams.
+An HTTP request and its associated response is called a stream. A connection may have many streams. In HTTP/1.1 they are executed sequentially, while in HTTP/2 they are executed concurrently.
+Cowboy calls the stream handler for nearly all events related to a stream. Exceptions vary depending on the protocol.
+Extra care must be taken when implementing stream handlers to ensure compatibility.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_stream/</link>
@@ -11024,6 +12385,18 @@ This function should be called by all stream handlers. It will propagate data to
 Arguments StreamID The stream ID.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:data(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.data/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.data/</guid>
+      <description>Name cowboy_stream:data - Handle data for a stream
+Description data(StreamID, IsFin, Data, State) -&amp;gt; {Commands, State} StreamID :: cowboy_stream:stream_id() IsFin :: cowboy_stream:fin() Data :: binary() Commands :: cowboy_stream:commands() State - opaque  Handle data for a stream.
+This function should be called by all stream handlers. It will propagate data to the next configured stream handler. Handlers do not have to propagate data that has been fully handled.
+Arguments StreamID The stream ID.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:early_error(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.early_error/</link>
@@ -11050,6 +12423,19 @@ Arguments StreamID The stream ID.
  Reason Reason for termination.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:early_error(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/</guid>
+      <description>Name cowboy_stream:early_error - Handle an early error for a stream
+Description early_error(StreamID, Reason, PartialReq, Resp, Opts) -&amp;gt; Resp StreamID :: cowboy_stream:stream_id() Reason :: cowboy_stream:reason() PartialReq :: cowboy_stream:partial_req() Resp :: cowboy_stream:resp_command() Opts :: cowboy:opts()  Handle an early error for a stream.
+This function should be called by all stream handlers. It will propagate the early error to the next configured stream handler.
+Arguments StreamID The stream ID.
+ Reason Reason for termination.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:info(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.info/</link>
@@ -11074,6 +12460,18 @@ This function should be called by all stream handlers. It will propagate the eve
 Arguments StreamID The stream ID.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:info(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.info/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.info/</guid>
+      <description>Name cowboy_stream:info - Handle a message for a stream
+Description info(StreamID, Info, State) -&amp;gt; {Commands, State} StreamID :: cowboy_stream:stream_id() Info :: any() Commands :: cowboy_stream:commands() State - opaque  Handle a message for a stream.
+This function should be called by all stream handlers. It will propagate the event to the next configured stream handler. Handlers do not have to propagate events that have been fully handled.
+Arguments StreamID The stream ID.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:init(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.init/</link>
@@ -11104,6 +12502,21 @@ Arguments StreamID The stream ID.
  Commands The commands to be executed.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:init(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.init/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.init/</guid>
+      <description>Name cowboy_stream:init - Initialize a stream
+Description init(StreamID, Req, Opts) -&amp;gt; {Commands, State} StreamID :: cowboy_stream:stream_id() Req :: cowboy_req:req() Opts :: cowboy:opts() Commands :: cowboy_stream:commands() State - opaque  Initialize a stream.
+This function must be called by all stream handlers. It will initialize the next configured stream handler.
+Arguments StreamID The stream ID.
+ Req The Req object.
+ Opts The protocol options.
+ Commands The commands to be executed.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:terminate(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.terminate/</link>
@@ -11134,6 +12547,21 @@ Arguments StreamID The stream ID.
   Return value The atom ok is always returned.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:terminate(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/</guid>
+      <description>Name cowboy_stream:terminate - Terminate a stream
+Description terminate(StreamID, Reason, State) -&amp;gt; ok StreamID :: cowboy_stream:stream_id() Reason :: cowboy_stream:reason() State - opaque  Terminate a stream.
+This function must be called by all stream handlers. It will terminate the next configured stream handler.
+Arguments StreamID The stream ID.
+ Reason Reason for termination.
+ State The state for the next stream handler.
+  Return value The atom ok is always returned.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy_stream_h/</link>
@@ -11170,6 +12598,18 @@ Options opts() :: #{ env =&amp;gt; cowboy_middleware:env(), middlewares =&amp;gt
 The default value is given next to the option name:</description>
     </item>
     
+    <item>
+      <title>cowboy_stream_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream_h/</guid>
+      <description>Name cowboy_stream_h - Default stream handler
+Description The module cowboy_stream_h is Cowboy&amp;apos;s default stream handler and defines much of its behavior. It is responsible for managing the request process, sending it the request body and translating its messages into commands that Cowboy understands.
+Options opts() :: #{ env =&amp;gt; cowboy_middleware:env(), middlewares =&amp;gt; [module()], shutdown_timeout =&amp;gt; timeout() }  Configuration for the default stream handler.
+The default value is given next to the option name:</description>
+    </item>
+    
     <item>
       <title>cowboy_stream_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_stream_h/</link>
@@ -11251,6 +12691,17 @@ Description The module cowboy_tracer_h can be used to conditionally trace stream
 Options opts() :: #{ tracer_callback =&amp;gt; Callback, tracer_flags =&amp;gt; [atom()], tracer_match_specs =&amp;gt; [MatchSpec] } Callback :: fun((init | terminate | tuple(), State) -&amp;gt; State) MatchSpec :: MatchPredicate | {method, binary()} | {host, binary()} | {path, binary()} | {path_start, binary()} | {header, binary()} | {header, binary(), binary()} | {peer_ip, inet:ip_address()} MatchPredicate :: fun((cowboy_stream:streamid(), cowboy_req:req(), cowboy:opts()) -&amp;gt; boolean()) }  Configuration for the tracer stream handler.</description>
     </item>
     
+    <item>
+      <title>cowboy_tracer_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_tracer_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_tracer_h/</guid>
+      <description>Name cowboy_tracer_h - Tracer stream handler
+Description The module cowboy_tracer_h can be used to conditionally trace streams based on information found in the request. Trace messages are given to the configured callback.
+Options opts() :: #{ tracer_callback =&amp;gt; Callback, tracer_flags =&amp;gt; [atom()], tracer_match_specs =&amp;gt; [MatchSpec] } Callback :: fun((init | terminate | tuple(), State) -&amp;gt; State) MatchSpec :: MatchPredicate | {method, binary()} | {host, binary()} | {path, binary()} | {path_start, binary()} | {header, binary()} | {header, binary(), binary()} | {peer_ip, inet:ip_address()} MatchPredicate :: fun((cowboy_stream:streamid(), cowboy_req:req(), cowboy:opts()) -&amp;gt; boolean()) }  Configuration for the tracer stream handler.</description>
+    </item>
+    
     <item>
       <title>cowboy_tracer_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_tracer_h/</link>
@@ -11320,6 +12771,18 @@ Callbacks Websocket handlers must implement the following callback interface:
 init(Req, State) -&amp;gt; {cowboy_websocket, Req, State} | {cowboy_websocket, Req, State, Opts} websocket_init(State) -&amp;gt; CallResult %% optional websocket_handle(InFrame, State) -&amp;gt; CallResult websocket_info(Info, State) -&amp;gt; CallResult terminate(Reason, PartialReq, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() PartialReq :: map() State :: any() Opts :: cowboy_websocket:opts() InFrame :: ping | pong | {text | binary | ping | pong, binary()} Info :: any() CallResult :: {commands(), State} | {commands(), State, hibernate} | Deprecated Deprecated :: {ok, State} | {ok, State, hibernate} | {reply, OutFrame | [OutFrame], State} | {reply, OutFrame | [OutFrame], State, hibernate} | {stop, State} OutFrame :: cow_ws:frame() %% see types below Reason :: normal | stop | timeout | remote | {remote, cow_ws:close_code(), binary()} | {error, badencoding | badframe | closed | atom()} | {crash, error | exit | throw, any()}  The init/2 callback is common to all handlers.</description>
     </item>
     
+    <item>
+      <title>cowboy_websocket(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_websocket/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_websocket/</guid>
+      <description>Name cowboy_websocket - Websocket
+Description The module cowboy_websocket implements Websocket as a Ranch protocol. It also defines a callback interface for handling Websocket connections.
+Callbacks Websocket handlers must implement the following callback interface:
+init(Req, State) -&amp;gt; {cowboy_websocket, Req, State} | {cowboy_websocket, Req, State, Opts} websocket_init(State) -&amp;gt; CallResult %% optional websocket_handle(InFrame, State) -&amp;gt; CallResult websocket_info(Info, State) -&amp;gt; CallResult terminate(Reason, PartialReq, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() PartialReq :: map() State :: any() Opts :: cowboy_websocket:opts() InFrame :: ping | pong | {text | binary | ping | pong, binary()} Info :: any() CallResult :: {commands(), State} | {commands(), State, hibernate} | Deprecated Deprecated :: {ok, State} | {ok, State, hibernate} | {reply, OutFrame | [OutFrame], State} | {reply, OutFrame | [OutFrame], State, hibernate} | {stop, State} OutFrame :: cow_ws:frame() %% see types below Reason :: normal | stop | timeout | remote | {remote, cow_ws:close_code(), binary()} | {error, badencoding | badframe | closed | atom()} | {crash, error | exit | throw, any()}  The init/2 callback is common to all handlers.</description>
+    </item>
+    
     <item>
       <title>cowboy_websocket(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_websocket/</link>
@@ -14374,6 +15837,17 @@ Description This chapter aims to list all HTTP status codes that Cowboy may retu
 100 Continue When the client sends an expect: 100-continue header, Cowboy automatically sends a this status code before trying to read the request body. This behavior can be disabled using the appropriate body option.</description>
     </item>
     
+    <item>
+      <title>HTTP status codes(7)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/http_status_codes/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/http_status_codes/</guid>
+      <description>Name HTTP status codes - status codes used by Cowboy
+Description This chapter aims to list all HTTP status codes that Cowboy may return, with details on the reasons why. The list given here only includes the replies that Cowboy sends, not user replies.
+100 Continue When the client sends an expect: 100-continue header, Cowboy automatically sends a this status code before trying to read the request body. This behavior can be disabled using the appropriate body option.</description>
+    </item>
+    
     <item>
       <title>HTTP status codes(7)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/http_status_codes/</link>
diff --git a/donate/index.html b/donate/index.html
index 64f10ea2..15ff521f 100644
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+++ b/donate/index.html
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diff --git a/erlanger-playbook/index.html b/erlanger-playbook/index.html
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diff --git a/index.html b/index.html
index 23d30d7b..811aeb40 100644
--- a/index.html
+++ b/index.html
@@ -112,10 +112,10 @@
 				
 				<a class="btn btn-large" href="https://github.com/ninenines/cowboy">Source Code</a>
 				
-					<a class="btn btn-large" href="/docs/en/cowboy/2.12/guide/">User Guide</a>
+					<a class="btn btn-large" href="/docs/en/cowboy/2.13/guide/">User Guide</a>
 				
 				
-					<a class="btn btn-large" href="/docs/en/cowboy/2.12/manual/">Manual</a>
+					<a class="btn btn-large" href="/docs/en/cowboy/2.13/manual/">Manual</a>
 				
 				
 			</p>
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diff --git a/index.xml b/index.xml
index be2b7249..c7c93fec 100644
--- a/index.xml
+++ b/index.xml
@@ -206,6 +206,17 @@ Cowboy supports all the standards listed in this document.
 HTTP/2 HTTP/2 is the most efficient protocol for consuming Web services. It enables clients to keep a connection open for long periods of time; to send requests concurrently; to reduce the size of requests through HTTP headers compression; and more. The protocol is binary, greatly reducing the resources needed to parse it.</description>
     </item>
     
+    <item>
+      <title>The modern Web</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/modern_web/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/modern_web/</guid>
+      <description>Cowboy is a server for the modern Web. This chapter explains what it means and details all the standards involved.
+Cowboy supports all the standards listed in this document.
+HTTP/2 HTTP/2 is the most efficient protocol for consuming Web services. It enables clients to keep a connection open for long periods of time; to send requests concurrently; to reduce the size of requests through HTTP headers compression; and more. The protocol is binary, greatly reducing the resources needed to parse it.</description>
+    </item>
+    
     <item>
       <title>The modern Web</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/modern_web/</link>
@@ -280,6 +291,16 @@ The Web is concurrent When you access a website there is little concurrency invo
 The Web is concurrent When you access a website there is little concurrency involved. A few connections are opened and requests are sent through these connections. Then the web page is displayed on your screen. Your browser will only open up to 4 or 8 connections to the server, depending on your settings.</description>
     </item>
     
+    <item>
+      <title>Erlang and the Web</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/erlang_web/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/erlang_web/</guid>
+      <description>Erlang is the ideal platform for writing Web applications. Its features are a perfect match for the requirements of modern Web applications.
+The Web is concurrent When you access a website there is little concurrency involved. A few connections are opened and requests are sent through these connections. Then the web page is displayed on your screen. Your browser will only open up to 4 or 8 connections to the server, depending on your settings.</description>
+    </item>
+    
     <item>
       <title>Erlang and the Web</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/erlang_web/</link>
@@ -560,6 +581,18 @@ Cowboy comes with functions for introspection and tracing, enabling developers t
 Cowboy is a high quality project. It has a small code base, is very efficient (both in latency and memory use) and can easily be embedded in another application.</description>
     </item>
     
+    <item>
+      <title>Introduction</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/introduction/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/introduction/</guid>
+      <description>Cowboy is a small, fast and modern HTTP server for Erlang/OTP.
+Cowboy aims to provide a complete modern Web stack. This includes HTTP/1.1, HTTP/2, Websocket, Server-Sent Events and Webmachine-based REST.
+Cowboy comes with functions for introspection and tracing, enabling developers to know precisely what is happening at any time. Its modular design also easily enable developers to add instrumentation.
+Cowboy is a high quality project. It has a small code base, is very efficient (both in latency and memory use) and can easily be embedded in another application.</description>
+    </item>
+    
     <item>
       <title>Introduction</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/introduction/</link>
@@ -842,6 +875,16 @@ This chapter walks you through all the steps of setting up Cowboy, writing your
 This chapter walks you through all the steps of setting up Cowboy, writing your first application and generating your first release.</description>
     </item>
     
+    <item>
+      <title>Getting started</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/getting_started/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/getting_started/</guid>
+      <description>Erlang is more than a language, it is also an operating system for your applications. Erlang developers rarely write standalone modules, they write libraries or applications, and then bundle those into what is called a release. A release contains the Erlang VM plus all applications required to run the node, so it can be pushed to production directly.
+This chapter walks you through all the steps of setting up Cowboy, writing your first application and generating your first release.</description>
+    </item>
+    
     <item>
       <title>Getting started</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/getting_started/</link>
@@ -1050,6 +1093,18 @@ Overview As you can see on the diagram, the client begins by connecting to the s
 After Ranch accepts a new connection, whether it is an HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Flow diagram</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/flow_diagram/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/flow_diagram/</guid>
+      <description>Cowboy is a lightweight HTTP server with support for HTTP/1.1, HTTP/2 and Websocket.
+It is built on top of Ranch. Please see the Ranch guide for more information about how the network connections are handled.
+Overview As you can see on the diagram, the client begins by connecting to the server. This step is handled by a Ranch acceptor, which is a process dedicated to accepting new connections.
+After Ranch accepts a new connection, whether it is an HTTP/1.</description>
+    </item>
+    
     <item>
       <title>Flow diagram</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/flow_diagram/</link>
@@ -1314,6 +1369,17 @@ This chapter is specific to Cowboy. Please refer to the Ranch User Guide for mor
 Cowboy provides two types of listeners: one listening for clear TCP connections, and one listening for secure TLS connections. Both of them support the HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Listeners</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/listeners/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/listeners/</guid>
+      <description>A listener is a set of processes that listens on a port for new connections. Incoming connections get handled by Cowboy. Depending on the connection handshake, one or another protocol may be used.
+This chapter is specific to Cowboy. Please refer to the Ranch User Guide for more information about listeners.
+Cowboy provides two types of listeners: one listening for clear TCP connections, and one listening for secure TLS connections. Both of them support the HTTP/1.</description>
+    </item>
+    
     <item>
       <title>Listeners</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/listeners/</link>
@@ -1454,6 +1520,18 @@ Cowboy routes requests using the following algorithm:
 If no configured host matches the request URI, a 400 response is returned.  Otherwise, the first configured host that matches the request URI will be used. Only the paths configured for this host will be considered.  If none of the configured paths found in the previous step match the request URI, a 404 response is returned.</description>
     </item>
     
+    <item>
+      <title>Routing</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/routing/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/routing/</guid>
+      <description>Cowboy does nothing by default.
+To make Cowboy useful, you need to map URIs to Erlang modules that will handle the requests. This is called routing.
+Cowboy routes requests using the following algorithm:
+If no configured host matches the request URI, a 400 response is returned.  Otherwise, the first configured host that matches the request URI will be used. Only the paths configured for this host will be considered.  If none of the configured paths found in the previous step match the request URI, a 404 response is returned.</description>
+    </item>
+    
     <item>
       <title>Routing</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/routing/</link>
@@ -1640,6 +1718,18 @@ Syntax Constraints are provided as a list of fields. For each field in the list,
 A field can take the form of an atom field, a tuple with constraints {field, Constraints} or a tuple with constraints and a default value {field, Constraints, Default}.</description>
     </item>
     
+    <item>
+      <title>Constraints</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/constraints/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/constraints/</guid>
+      <description>Constraints are validation and conversion functions applied to user input.
+They are used in various places in Cowboy, including the router and the cowboy_req match functions.
+Syntax Constraints are provided as a list of fields. For each field in the list, specific constraints can be applied, as well as a default value if the field is missing.
+A field can take the form of an atom field, a tuple with constraints {field, Constraints} or a tuple with constraints and a default value {field, Constraints, Default}.</description>
+    </item>
+    
     <item>
       <title>Constraints</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/constraints/</link>
@@ -1797,6 +1887,19 @@ A handler that does nothing would look like this:
 init(Req, State) -&amp;gt; {ok, Req, State}.  Despite sending no reply, a 204 No Content response will be sent to the client, as Cowboy makes sure that a response is sent for every request.</description>
     </item>
     
+    <item>
+      <title>Handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/handlers/</guid>
+      <description>Handlers are Erlang modules that handle HTTP requests.
+Plain HTTP handlers The most basic handler in Cowboy implements the mandatory init/2 callback, manipulates the request, optionally sends a response and then returns.
+This callback receives the Req object and the initial state defined in the router configuration.
+A handler that does nothing would look like this:
+init(Req, State) -&amp;gt; {ok, Req, State}.  Despite sending no reply, a 204 No Content response will be sent to the client, as Cowboy makes sure that a response is sent for every request.</description>
+    </item>
+    
     <item>
       <title>Handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/handlers/</link>
@@ -1965,6 +2068,16 @@ Loop handlers are used for requests where a response might not be immediately av
 Loop handlers are used for requests where a response might not be immediately available, but where you would like to keep the connection open for a while in case the response arrives. The most known example of such practice is known as long polling.</description>
     </item>
     
+    <item>
+      <title>Loop handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/loop_handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/loop_handlers/</guid>
+      <description>Loop handlers are a special kind of HTTP handlers used when the response can not be sent right away. The handler enters instead a receive loop waiting for the right message before it can send a response.
+Loop handlers are used for requests where a response might not be immediately available, but where you would like to keep the connection open for a while in case the response arrives. The most known example of such practice is known as long polling.</description>
+    </item>
+    
     <item>
       <title>Loop handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/loop_handlers/</link>
@@ -2068,6 +2181,17 @@ For systems in production, consider using one of the many Content Distribution N
 The static handler can serve either one file or all files from a given directory. The etag generation and mime types can be configured.</description>
     </item>
     
+    <item>
+      <title>Static files</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/static_files/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/static_files/</guid>
+      <description>Cowboy comes with a ready to use handler for serving static files. It is provided as a convenience for serving files during development.
+For systems in production, consider using one of the many Content Distribution Network (CDN) available on the market, as they are the best solution for serving files.
+The static handler can serve either one file or all files from a given directory. The etag generation and mime types can be configured.</description>
+    </item>
+    
     <item>
       <title>Static files</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/static_files/</link>
@@ -2231,6 +2355,17 @@ It is not really an object in the object-oriented sense. It is a simple map that
 The Req object is the subject of a few different chapters. In this chapter we will learn about the Req object and look at how to retrieve information about the request.</description>
     </item>
     
+    <item>
+      <title>The Req object</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/req/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/req/</guid>
+      <description>The Req object is a variable used for obtaining information about a request, read its body or send a response.
+It is not really an object in the object-oriented sense. It is a simple map that can be directly accessed or used when calling functions from the cowboy_req module.
+The Req object is the subject of a few different chapters. In this chapter we will learn about the Req object and look at how to retrieve information about the request.</description>
+    </item>
+    
     <item>
       <title>The Req object</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/req/</link>
@@ -2375,6 +2510,18 @@ Cowboy will not cache the body, it is therefore only possible to read it once.
 You are not required to read it, however. If a body is present and was not read, Cowboy will either cancel or skip its download, depending on the protocol.</description>
     </item>
     
+    <item>
+      <title>Reading the request body</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/req_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/req_body/</guid>
+      <description>The request body can be read using the Req object.
+Cowboy will not attempt to read the body until requested. You need to call the body reading functions in order to retrieve it.
+Cowboy will not cache the body, it is therefore only possible to read it once.
+You are not required to read it, however. If a body is present and was not read, Cowboy will either cancel or skip its download, depending on the protocol.</description>
+    </item>
+    
     <item>
       <title>Reading the request body</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/req_body/</link>
@@ -2479,6 +2626,18 @@ Cowboy also provides a simplified interface for sending files. It can also send
 While only one response is allowed for every request, HTTP/2 introduced a mechanism that allows the server to push additional resources related to the response.</description>
     </item>
     
+    <item>
+      <title>Sending a response</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/resp/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/resp/</guid>
+      <description>The response must be sent using the Req object.
+Cowboy provides two different ways of sending responses: either directly or by streaming the body. Response headers and body may be set in advance. The response is sent as soon as one of the reply or stream reply function is called.
+Cowboy also provides a simplified interface for sending files. It can also send only specific parts of a file.
+While only one response is allowed for every request, HTTP/2 introduced a mechanism that allows the server to push additional resources related to the response.</description>
+    </item>
+    
     <item>
       <title>Sending a response</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/resp/</link>
@@ -2610,6 +2769,16 @@ Cookies are a name/value store where the names and values are stored in plain te
 Cookies are a name/value store where the names and values are stored in plain text. They expire either after a delay or when the browser closes. They can be configured on a specific domain name or path, and restricted to secure resources (sent or downloaded over HTTPS), or restricted to the server (disallowing access from client-side scripts).</description>
     </item>
     
+    <item>
+      <title>Using cookies</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/cookies/</guid>
+      <description>Cookies are a mechanism allowing applications to maintain state on top of the stateless HTTP protocol.
+Cookies are a name/value store where the names and values are stored in plain text. They expire either after a delay or when the browser closes. They can be configured on a specific domain name or path, and restricted to secure resources (sent or downloaded over HTTPS), or restricted to the server (disallowing access from client-side scripts).</description>
+    </item>
+    
     <item>
       <title>Using cookies</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/cookies/</link>
@@ -2683,6 +2852,17 @@ A multipart message is a list of parts. A part contains headers and a body. The
 In the context of HTTP, multipart is most often used with the multipart/form-data media type.</description>
     </item>
     
+    <item>
+      <title>Multipart requests</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/multipart/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/multipart/</guid>
+      <description>Multipart originates from MIME, an Internet standard that extends the format of emails.
+A multipart message is a list of parts. A part contains headers and a body. The body of the parts may be of any media type, and contain text or binary data. It is possible for parts to contain a multipart media type.
+In the context of HTTP, multipart is most often used with the multipart/form-data media type.</description>
+    </item>
+    
     <item>
       <title>Multipart requests</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/multipart/</link>
@@ -2791,6 +2971,17 @@ REST is often confused with performing a distinct operation depending on the HTT
 We will first attempt to define REST and will look at what it means in the context of HTTP and the Web. For a more in-depth explanation of REST, you can read Roy T.</description>
     </item>
     
+    <item>
+      <title>REST principles</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_principles/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_principles/</guid>
+      <description>This chapter will attempt to define the concepts behind REST and explain what makes a service RESTful.
+REST is often confused with performing a distinct operation depending on the HTTP method, while using more than the GET and POST methods. That&amp;apos;s highly misguided at best.
+We will first attempt to define REST and will look at what it means in the context of HTTP and the Web. For a more in-depth explanation of REST, you can read Roy T.</description>
+    </item>
+    
     <item>
       <title>REST principles</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_principles/</link>
@@ -2881,6 +3072,18 @@ Initialization First, the init/2 callback is called. This callback is common to
 init(Req, State) -&amp;gt; {cowboy_rest, Req, State}.</description>
     </item>
     
+    <item>
+      <title>REST handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_handlers/</guid>
+      <description>REST is implemented in Cowboy as a sub protocol. The request is handled as a state machine with many optional callbacks describing the resource and modifying the machine&amp;apos;s behavior.
+The REST handler is the recommended way to handle HTTP requests.
+Initialization First, the init/2 callback is called. This callback is common to all handlers. To use REST for the current request, this function must return a cowboy_rest tuple.
+init(Req, State) -&amp;gt; {cowboy_rest, Req, State}.</description>
+    </item>
+    
     <item>
       <title>REST handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_handlers/</link>
@@ -2962,6 +3165,17 @@ There are four main paths that requests may follow. One for the method OPTIONS;
 All paths start with the &amp;quot;Start&amp;quot; diagram, and all paths excluding the OPTIONS path go through the &amp;quot;Content negotiation&amp;quot; diagram and optionally the &amp;quot;Conditional requests&amp;quot; diagram if the resource exists.</description>
     </item>
     
+    <item>
+      <title>REST flowcharts</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_flowcharts/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_flowcharts/</guid>
+      <description>This chapter will explain the REST handler state machine through a number of different diagrams.
+There are four main paths that requests may follow. One for the method OPTIONS; one for the methods GET and HEAD; one for the methods PUT, POST and PATCH; and one for the method DELETE.
+All paths start with the &amp;quot;Start&amp;quot; diagram, and all paths excluding the OPTIONS path go through the &amp;quot;Content negotiation&amp;quot; diagram and optionally the &amp;quot;Conditional requests&amp;quot; diagram if the resource exists.</description>
+    </item>
+    
     <item>
       <title>REST flowcharts</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_flowcharts/</link>
@@ -3036,6 +3250,16 @@ The service Can the service become unavailable, and when it does, can we detect
 The service Can the service become unavailable, and when it does, can we detect it? For example, database connectivity problems may be detected early. We may also have planned outages of all or parts of the system.</description>
     </item>
     
+    <item>
+      <title>Designing a resource handler</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/resource_design/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/resource_design/</guid>
+      <description>This chapter aims to provide you with a list of questions you must answer in order to write a good resource handler. It is meant to be usable as a step by step guide.
+The service Can the service become unavailable, and when it does, can we detect it? For example, database connectivity problems may be detected early. We may also have planned outages of all or parts of the system.</description>
+    </item>
+    
     <item>
       <title>Designing a resource handler</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/resource_design/</link>
@@ -3109,6 +3333,17 @@ Description Websocket is an extension to HTTP that emulates plain TCP connection
 Websocket connections are fully asynchronous, unlike HTTP/1.1 (synchronous) and HTTP/2 (asynchronous, but the server can only initiate streams in response to requests).</description>
     </item>
     
+    <item>
+      <title>The Websocket protocol</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_protocol/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_protocol/</guid>
+      <description>This chapter explains what Websocket is and why it is a vital component of soft realtime Web applications.
+Description Websocket is an extension to HTTP that emulates plain TCP connections between the client, typically a Web browser, and the server. It uses the HTTP Upgrade mechanism to establish the connection.
+Websocket connections are fully asynchronous, unlike HTTP/1.1 (synchronous) and HTTP/2 (asynchronous, but the server can only initiate streams in response to requests).</description>
+    </item>
+    
     <item>
       <title>The Websocket protocol</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/ws_protocol/</link>
@@ -3183,6 +3418,16 @@ As Websocket connections are established through the HTTP/1.1 upgrade mechanism,
 As Websocket connections are established through the HTTP/1.1 upgrade mechanism, Websocket handlers need to be able to first receive the HTTP request for the upgrade, before switching to Websocket and taking over the connection. They can then receive or send Websocket frames, handle incoming Erlang messages or close the connection.</description>
     </item>
     
+    <item>
+      <title>Websocket handlers</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_handlers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_handlers/</guid>
+      <description>Websocket handlers provide an interface for upgrading HTTP/1.1 connections to Websocket and sending or receiving frames on the Websocket connection.
+As Websocket connections are established through the HTTP/1.1 upgrade mechanism, Websocket handlers need to be able to first receive the HTTP request for the upgrade, before switching to Websocket and taking over the connection. They can then receive or send Websocket frames, handle incoming Erlang messages or close the connection.</description>
+    </item>
+    
     <item>
       <title>Websocket handlers</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/ws_handlers/</link>
@@ -3256,6 +3501,17 @@ The term stream comes from HTTP/2. In Cowboy, it is also used when talking about
 All versions of HTTP allow clients to initiate streams. HTTP/2 is the only one also allowing servers, through its server push feature. Both client and server-initiated streams go through the same process in Cowboy.</description>
     </item>
     
+    <item>
+      <title>Streams</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/streams/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/streams/</guid>
+      <description>A stream is the set of messages that form an HTTP request/response pair.
+The term stream comes from HTTP/2. In Cowboy, it is also used when talking about HTTP/1.1 or HTTP/1.0. It should not be confused with streaming the request or response body.
+All versions of HTTP allow clients to initiate streams. HTTP/2 is the only one also allowing servers, through its server push feature. Both client and server-initiated streams go through the same process in Cowboy.</description>
+    </item>
+    
     <item>
       <title>Streams</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/streams/</link>
@@ -3333,6 +3589,17 @@ Middlewares give you complete control over how requests are to be processed. You
 Cowboy will execute all middlewares in the given order, unless one of them decides to stop processing.</description>
     </item>
     
+    <item>
+      <title>Middlewares</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/middlewares/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/middlewares/</guid>
+      <description>Cowboy delegates the request processing to middleware components. By default, two middlewares are defined, for the routing and handling of the request, as is detailed in most of this guide.
+Middlewares give you complete control over how requests are to be processed. You can add your own middlewares to the mix or completely change the chain of middlewares as needed.
+Cowboy will execute all middlewares in the given order, unless one of them decides to stop processing.</description>
+    </item>
+    
     <item>
       <title>Middlewares</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/middlewares/</link>
@@ -3429,6 +3696,16 @@ One process per connection The first version of Cowboy featured a single process
 One process per connection The first version of Cowboy featured a single process per connection, whereas the current version of Cowboy features one process per connection plus one process per request. This has a negative impact on performance, but is necessary in order to provide a common interface for both HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Performance</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/performance/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/performance/</guid>
+      <description>This chapter describes the performance characteristics of Cowboy and offers suggestions to get the most performance out of your application.
+One process per connection The first version of Cowboy featured a single process per connection, whereas the current version of Cowboy features one process per connection plus one process per request. This has a negative impact on performance, but is necessary in order to provide a common interface for both HTTP/1.</description>
+    </item>
+    
     <item>
       <title>Performance</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.8/guide/performance/</link>
@@ -3471,6 +3748,17 @@ Cowboy 2.12 requires Erlang/OTP 24.0 or greater.
 Features added A new HTTP/2 option max_fragmented_header_block_size has been added to limit the size of header blocks that are sent over multiple HEADERS and CONTINUATION frames.  Update Cowlib to 2.13.0.   </description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.12 to 2.13</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/</guid>
+      <description>Cowboy 2.13 focuses on improving the performance of Websocket, as well as the HTTP protocols. It also contains a variety of new features and bug fixes. In addition, Cowboy 2.13 is the first Cowboy version that contains the experimental HTTP/3 support.
+Cowboy 2.13 requires Erlang/OTP 24.0 or greater.
+Features added The option dynamic_buffer has been added. When enabled, Cowboy will dynamically change the buffer socket option based on how much data it receives.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.7 to 2.8</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.8/guide/migrating_from_2.7/</link>
@@ -3566,6 +3854,17 @@ Cowboy 2.11 requires Erlang/OTP 24.0 or greater.
 Cowboy is now using GitHub Actions for CI. The main reason for the move is to reduce costs by no longer having to self-host CI runners. The downside is that GitHub runners are less reliable and timing dependent tests are now more likely to fail.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.11 to 2.12</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.11/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.11/</guid>
+      <description>Cowboy 2.12 contains a small security improvement for the HTTP/2 protocol.
+Cowboy 2.12 requires Erlang/OTP 24.0 or greater.
+Features added A new HTTP/2 option max_fragmented_header_block_size has been added to limit the size of header blocks that are sent over multiple HEADERS and CONTINUATION frames.  Update Cowlib to 2.13.0.   </description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.9 to 2.10</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/guide/migrating_from_2.9/</link>
@@ -3638,6 +3937,17 @@ Cowboy 2.9 is the first release to support the much awaited Erlang/OTP 24 out of
 Cowboy 2.9 also contains a small number of tweaks and bug fixes.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.10 to 2.11</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.10/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.10/</guid>
+      <description>Cowboy 2.11 contains a variety of new features and bug fixes. Nearly all previously experimental features are now marked as stable, including Websocket over HTTP/2. Included is a fix for an HTTP/2 protocol CVE.
+Cowboy 2.11 requires Erlang/OTP 24.0 or greater.
+Cowboy is now using GitHub Actions for CI. The main reason for the move is to reduce costs by no longer having to self-host CI runners. The downside is that GitHub runners are less reliable and timing dependent tests are now more likely to fail.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.9 to 2.10</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.9/</link>
@@ -3721,13 +4031,24 @@ Cowboy 2.9 also contains a small number of tweaks and bug fixes.</description>
     </item>
     
     <item>
-      <title>Migrating from Cowboy 2.2 to 2.3</title>
-      <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</link>
+      <title>Migrating from Cowboy 2.9 to 2.10</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.9/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</guid>
-      <description>Cowboy 2.3 focused on making the Cowboy processes behave properly according to OTP principles. This version is a very good milestone toward that goal and most of everything should now work. Release upgrades and a few details will be improved in future versions.
-Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.9/</guid>
+      <description>Cowboy 2.10 is a maintenance release adding support for Erlang/OTP 26. The main change is a Cowlib update to fix a compilation error that only occurs starting from OTP 26.
+Cowboy 2.10 requires Erlang/OTP 22.0 or greater.
+Features added Add support for Default value of SameSite cookie attribute.  Add support for the stale-* cache-control directives from RFC 5861.  Update Cowlib to 2.12.1.   Bugs fixed Fix a compilation error in Cowlib when using Erlang/OTP 26.</description>
+    </item>
+    
+    <item>
+      <title>Migrating from Cowboy 2.2 to 2.3</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</guid>
+      <description>Cowboy 2.3 focused on making the Cowboy processes behave properly according to OTP principles. This version is a very good milestone toward that goal and most of everything should now work. Release upgrades and a few details will be improved in future versions.
+Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
     </item>
     
     <item>
@@ -3790,6 +4111,17 @@ Features added Add support for the PROXY protocol header. It can be enabled via
 Cowboy 2.8 also contains a small number of tweaks and bug fixes. Cowboy 2.8 is the first Cowboy release, ever, to be consistently green on all tested platforms.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.8 to 2.9</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.8/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.8/</guid>
+      <description>Cowboy 2.9 implements graceful shutdown of connection processes for both HTTP/1.1 and HTTP/2 connections.
+Cowboy 2.9 is the first release to support the much awaited Erlang/OTP 24 out of the box. While users that were using Ranch 2.0 already were ready for OTP 24, the Ranch version used by Cowboy out of the box was not compatible and had to be updated.
+Cowboy 2.9 also contains a small number of tweaks and bug fixes.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.1 to 2.2</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.1/</link>
@@ -3860,6 +4192,16 @@ Features added Add support for the PROXY protocol header. It can be enabled via
       <description>Cowboy 2.7 improves the HTTP/2 code with optimizations around the sending of DATA and WINDOW_UPDATE frames; graceful shutdown of the connection when the client is going away; and rate limiting mechanisms. New options and mechanisms have also been added to control the amount of memory Cowboy ends up using with both HTTP/1.1 and HTTP/2. Much, but not all, of this work was done to address HTTP/2 CVEs about potential denial of service.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.7 to 2.8</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.7/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.7/</guid>
+      <description>Cowboy 2.8 contains many optimizations for all protocols. HTTP/1.1 has received the largest improvements and Cowboy will now be able to handle noticeably more requests. Thanks to the folks at Stressgrid for helping identify that the performance was lower than it should have been and for benchmarking my many changes and experiments.
+Cowboy 2.8 also contains a small number of tweaks and bug fixes. Cowboy 2.8 is the first Cowboy release, ever, to be consistently green on all tested platforms.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 2.0 to 2.1</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.0/</link>
@@ -3931,6 +4273,15 @@ A large number of tickets were also closed which resulted in many bugs fixed and
 Features added Add support for the PROXY protocol header. It can be enabled via the proxy_header option.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.6 to 2.7</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.6/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.6/</guid>
+      <description>Cowboy 2.7 improves the HTTP/2 code with optimizations around the sending of DATA and WINDOW_UPDATE frames; graceful shutdown of the connection when the client is going away; and rate limiting mechanisms. New options and mechanisms have also been added to control the amount of memory Cowboy ends up using with both HTTP/1.1 and HTTP/2. Much, but not all, of this work was done to address HTTP/2 CVEs about potential denial of service.</description>
+    </item>
+    
     <item>
       <title>Migrating from Cowboy 1.0 to 2.0</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_1.0/</link>
@@ -4003,6 +4354,17 @@ Features added Add experimental support for Websocket over HTTP/2. You can use t
 Features added Add option linger_timeout to control how long Cowboy will wait before closing the socket when shutting down the connection. This helps avoid the TCP reset problem HTTP/1.1 suffers from. The default is now 1000 ms.  It is now possible to stream a response body without using chunked transfer-encoding when the protocol is HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.5 to 2.6</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.5/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.5/</guid>
+      <description>Cowboy 2.6 greatly refactored the HTTP/2 code, a large part of which was moved to Cowlib and is now used by both the Cowboy server and the Gun client.
+A large number of tickets were also closed which resulted in many bugs fixed and many features and options added, although some of them are still experimental.
+Features added Add support for the PROXY protocol header. It can be enabled via the proxy_header option.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/specs/</link>
@@ -4074,6 +4436,16 @@ Features added Add support for all functions from the module sys. Note that Cowb
 Features added Add experimental support for Websocket over HTTP/2. You can use the enable_connect_protocol option to enable. It implements the following draft: https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01  Add options max_decode_table_size and max_encode_table_size to restrict the size of the HPACK compression dictionary.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.4 to 2.5</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.4/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.4/</guid>
+      <description>Cowboy 2.5 focused on making the test suites pass. A variety of new features, fixes and improvements have also been worked on.
+Features added Add option linger_timeout to control how long Cowboy will wait before closing the socket when shutting down the connection. This helps avoid the TCP reset problem HTTP/1.1 suffers from. The default is now 1000 ms.  It is now possible to stream a response body without using chunked transfer-encoding when the protocol is HTTP/1.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.8/guide/specs/</link>
@@ -4125,6 +4497,16 @@ Features added Add support for sending trailers at the end of response bodies. T
 Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.3 to 2.4</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.3/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.3/</guid>
+      <description>Cowboy 2.4 focused on improving the HTTP/2 implementation. All existing tests from RFC7540 and the h2spec test suite now all pass. Numerous options have been added to control SETTINGS and related behavior. In addition experimental support for Websocket over HTTP/2 was added.
+Features added Add experimental support for Websocket over HTTP/2. You can use the enable_connect_protocol option to enable. It implements the following draft: https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01  Add options max_decode_table_size and max_encode_table_size to restrict the size of the HPACK compression dictionary.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.9/guide/specs/</link>
@@ -4166,6 +4548,16 @@ Features added It is now possible to obtain the client TLS certificate and the l
 Features added Add support for sending trailers at the end of response bodies. Trailers are additional header fields that may be sent after the body to add more information to the response. Their usage is required in gRPC servers. They are optional and may be discarded in other scenarios (for example if the request goes through an HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.2 to 2.3</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.2/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.2/</guid>
+      <description>Cowboy 2.3 focused on making the Cowboy processes behave properly according to OTP principles. This version is a very good milestone toward that goal and most of everything should now work. Release upgrades and a few details will be improved in future versions.
+Features added Add support for all functions from the module sys. Note that Cowboy currently does not implement the sys debugging mechanisms as tracing is recommended instead.  Add a max_frame_size option for Websocket handlers to close the connection when the client attempts to send a frame that&amp;apos;s too large.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/guide/specs/</link>
@@ -4197,6 +4589,16 @@ Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erl
 Features added It is now possible to obtain the client TLS certificate and the local IP/port for the connection from the Req object.  Informational responses (1XX responses) can now be sent. They must be sent before initiating the final response.  The expect: 100-continue header is now handled automatically.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.1 to 2.2</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.1/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.1/</guid>
+      <description>Cowboy 2.2 focused on adding features required for writing gRPC servers and on completing test suites for the core HTTP RFCs, fixing many bugs along the way.
+Features added Add support for sending trailers at the end of response bodies. Trailers are additional header fields that may be sent after the body to add more information to the response. Their usage is required in gRPC servers. They are optional and may be discarded in other scenarios (for example if the request goes through an HTTP/1.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/guide/specs/</link>
@@ -4218,6 +4620,16 @@ The documentation has seen great work, in particular the manual. Each module and
 Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erlang/OTP 19.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 2.0 to 2.1</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.0/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.0/</guid>
+      <description>Cowboy 2.1 focused on adding features that were temporarily removed in Cowboy 2.0. A number of bugs found in the 2.0 release were also fixed.
+Features added It is now possible to obtain the client TLS certificate and the local IP/port for the connection from the Req object.  Informational responses (1XX responses) can now be sent. They must be sent before initiating the final response.  The expect: 100-continue header is now handled automatically.</description>
+    </item>
+    
     <item>
       <title>HTTP and other specifications</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.12/guide/specs/</link>
@@ -4228,6 +4640,40 @@ Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erl
 HTTP IANA Registries HTTP Method Registry  HTTP Status Code Registry  Message Headers  HTTP Parameters  HTTP Alt-Svc Parameter Registry  HTTP Authentication Scheme Registry  HTTP Cache Directive Registry  HTTP Digest Algorithm Values  HTTP Origin-Bound Authentication Device Identifier Types  HTTP Upgrade Token Registry  HTTP Warn Codes  HTTP/2 Parameters  WebSocket Protocol Registries   Current CORS: Cross-Origin Resource Sharing  CSP2: Content Security Policy Level 2  DNT: Tracking Preference Expression (DNT)  eventsource: Server-Sent Events  Form content types: Form content types  Preload: Preload  PROXY: The PROXY protocol  REST: Fielding&amp;apos;s Dissertation  RFC 1945: HTTP/1.</description>
     </item>
     
+    <item>
+      <title>Migrating from Cowboy 1.0 to 2.0</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_1.0/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_1.0/</guid>
+      <description>A lot has changed between Cowboy 1.0 and 2.0. The cowboy_req interface in particular has seen a massive revamp. Hooks are gone, their functionality can now be achieved via stream handlers.
+The documentation has seen great work, in particular the manual. Each module and each function now has its own dedicated manual page with full details and examples.
+Compatibility Compatibility with Erlang/OTP R16, 17 and 18 has been dropped. Erlang/OTP 19.</description>
+    </item>
+    
+    <item>
+      <title>HTTP and other specifications</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/specs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/specs/</guid>
+      <description>This chapter intends to list all the specification documents for or related to HTTP.
+HTTP IANA Registries HTTP Method Registry  HTTP Status Code Registry  Message Headers  HTTP Parameters  HTTP Alt-Svc Parameter Registry  HTTP Authentication Scheme Registry  HTTP Cache Directive Registry  HTTP Digest Algorithm Values  HTTP Origin-Bound Authentication Device Identifier Types  HTTP Upgrade Token Registry  HTTP Warn Codes  HTTP/2 Parameters  WebSocket Protocol Registries   Current CORS: Cross-Origin Resource Sharing  CSP2: Content Security Policy Level 2  DNT: Tracking Preference Expression (DNT)  eventsource: Server-Sent Events  Form content types: Form content types  Preload: Preload  PROXY: The PROXY protocol  REST: Fielding&amp;apos;s Dissertation  RFC 1945: HTTP/1.</description>
+    </item>
+    
+    <item>
+      <title>Cowboy 2.13</title>
+      <link>https://ninenines.eu/articles/cowboy-2.13.0/</link>
+      <pubDate>Tue, 18 Feb 2025 07:00:00 +0100</pubDate>
+      
+      <guid>https://ninenines.eu/articles/cowboy-2.13.0/</guid>
+      <description>Cowboy 2.13.0 has been released!
+Cowboy 2.13 focuses on improving the performance of Websocket, as well as the HTTP protocols. It also contains a variety of new features and bug fixes.
+The performance improvements were detailed in the Performance improvements in Cowboy 2.13 article.
+Cowboy 2.13 is the first release to feature experimental support for the HTTP/3 protocol, including Websocket over HTTP/3.
+Cowboy 2.13 requires Erlang/OTP 24.0 or greater. It is tested and supported on Linux, macOS and Windows.</description>
+    </item>
+    
     <item>
       <title>Ranch 2.2</title>
       <link>https://ninenines.eu/articles/ranch-2.2.0/</link>
@@ -5452,6 +5898,19 @@ Modules Functions:
 cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
     </item>
     
+    <item>
+      <title>Cowboy Function Reference</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/</guid>
+      <description>Name cowboy - Small, fast, modern HTTP server for Erlang/OTP
+Description Cowboy is an HTTP server for Erlang/OTP with support for the HTTP/1.1, HTTP/2 and Websocket protocols.
+Cowboy aims to provide a complete HTTP stack. This includes the implementation of the HTTP RFCs but also any directly related standards, like Websocket or Server-Sent Events.
+Modules Functions:
+cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
+    </item>
+    
     <item>
       <title>Cowboy Function Reference</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/</link>
@@ -5531,6 +5990,15 @@ cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_ro
       <description>Rationale The modern Web  Erlang and the Web   Introduction Introduction  Getting started  Flow diagram   Configuration Listeners  Routing  Constraints   Handlers Handlers  Loop handlers  Static files   Request and response Request details  Reading the request body  Sending a response  Using cookies  Multipart   REST REST principles  Handling REST requests  REST flowcharts  Designing a resource handler   Websocket The Websocket protocol  Websocket handlers   Advanced Streams  Middlewares  Performance   Additional information Migrating from Cowboy 2.</description>
     </item>
     
+    <item>
+      <title>Cowboy User Guide</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/guide/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/guide/</guid>
+      <description>Rationale The modern Web  Erlang and the Web   Introduction Introduction  Getting started  Flow diagram   Configuration Listeners  Routing  Constraints   Handlers Handlers  Loop handlers  Static files   Request and response Request details  Reading the request body  Sending a response  Using cookies  Multipart   REST REST principles  Handling REST requests  REST flowcharts  Designing a resource handler   Websocket The Websocket protocol  Websocket handlers   Advanced Streams  Middlewares  Performance   Additional information Migrating from Cowboy 2.</description>
+    </item>
+    
     <item>
       <title>Cowboy User Guide</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/guide/</link>
@@ -5600,6 +6068,17 @@ Description The module cowboy provides convenience functions for manipulating Ra
 Exports cowboy:start_clear(3) - Listen for connections using plain TCP  cowboy:start_tls(3) - Listen for connections using TLS  cowboy:stop_listener(3) - Stop the given listener  cowboy:get_env(3) - Retrieve a listener&amp;apos;s environment value  cowboy:set_env(3) - Update a listener&amp;apos;s environment value   Types fields() fields() :: [Name | {Name, Constraints} | {Name, Constraints, Default}] Name :: atom() Constraints :: Constraint | [Constraint] Constraint :: cowboy_constraints:constraint() Default :: any()  Fields description for match operations.</description>
     </item>
     
+    <item>
+      <title>cowboy(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy/</guid>
+      <description>Name cowboy - HTTP server
+Description The module cowboy provides convenience functions for manipulating Ranch listeners.
+Exports cowboy:start_clear(3) - Listen for connections using plain TCP  cowboy:start_tls(3) - Listen for connections using TLS  cowboy:stop_listener(3) - Stop the given listener  cowboy:get_env(3) - Retrieve a listener&amp;apos;s environment value  cowboy:set_env(3) - Update a listener&amp;apos;s environment value   Types fields() fields() :: [Name | {Name, Constraints} | {Name, Constraints, Default}] Name :: atom() Constraints :: Constraint | [Constraint] Constraint :: cowboy_constraints:constraint() Default :: any()  Fields description for match operations.</description>
+    </item>
+    
     <item>
       <title>cowboy(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy/</link>
@@ -5683,6 +6162,19 @@ Modules Functions:
 cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
     </item>
     
+    <item>
+      <title>cowboy(7)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_app/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_app/</guid>
+      <description>Name cowboy - Small, fast, modern HTTP server for Erlang/OTP
+Description Cowboy is an HTTP server for Erlang/OTP with support for the HTTP/1.1, HTTP/2 and Websocket protocols.
+Cowboy aims to provide a complete HTTP stack. This includes the implementation of the HTTP RFCs but also any directly related standards, like Websocket or Server-Sent Events.
+Modules Functions:
+cowboy(3) - Listener management  cowboy_req(3) - Request and response  cowboy_router(3) - Router  cowboy_constraints(3) - Constraints   Protocols:</description>
+    </item>
+    
     <item>
       <title>cowboy(7)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_app/</link>
@@ -5761,6 +6253,19 @@ Arguments Name The name of the listener to access.
 The name of the listener is the first argument given to the cowboy:start_clear(3), cowboy:start_tls(3) or ranch:start_listener(3) function.</description>
     </item>
     
+    <item>
+      <title>cowboy:get_env(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.get_env/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.get_env/</guid>
+      <description>Name cowboy:get_env - Retrieve a listener&amp;apos;s environment value
+Description get_env(Name :: ranch:ref(), Key :: atom()) -&amp;gt; any() get_env(Name :: ranch:ref(), Key :: atom(), Default :: any()) -&amp;gt; any()  Retrieve an environment value for a previously started listener.
+This function may crash when the key is missing from the environment and a default value is not provided.
+Arguments Name The name of the listener to access.
+The name of the listener is the first argument given to the cowboy:start_clear(3), cowboy:start_tls(3) or ranch:start_listener(3) function.</description>
+    </item>
+    
     <item>
       <title>cowboy:set_env(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy.set_env/</link>
@@ -5800,6 +6305,19 @@ The new value will only be available to new connections. Pre-existing connection
 Arguments Name The name of the listener to update.</description>
     </item>
     
+    <item>
+      <title>cowboy:set_env(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.set_env/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.set_env/</guid>
+      <description>Name cowboy:set_env - Update a listener&amp;apos;s environment value
+Description set_env(Name :: ranch:ref(), Key :: atom(), Value :: any()) -&amp;gt; ok  Set or update an environment value for a previously started listener.
+This is most useful for updating the routes dynamically, without having to restart the listener.
+The new value will only be available to new connections. Pre-existing connections will still use the old value.
+Arguments Name The name of the listener to update.</description>
+    </item>
+    
     <item>
       <title>cowboy:set_env(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.set_env/</link>
@@ -5888,6 +6406,18 @@ Both HTTP/1.1 and HTTP/2 are supported on this listener. HTTP/2 has two methods
 Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
     </item>
     
+    <item>
+      <title>cowboy:start_clear(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_clear/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_clear/</guid>
+      <description>Name cowboy:start_clear - Listen for connections using plain TCP
+Description start_clear(Name :: ranch:ref(), TransportOpts :: ranch_tcp:opts(), ProtocolOpts :: opts()) -&amp;gt; {ok, ListenerPid :: pid()} | {error, any()}  Start listening for connections over a clear TCP channel.
+Both HTTP/1.1 and HTTP/2 are supported on this listener. HTTP/2 has two methods of establishing a connection over a clear TCP channel. Both the upgrade and the prior knowledge methods are supported.
+Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
+    </item>
+    
     <item>
       <title>cowboy:start_clear(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.start_clear/</link>
@@ -5972,6 +6502,18 @@ Both HTTP/1.1 and HTTP/2 are supported on this listener. The ALPN TLS extension
 Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
     </item>
     
+    <item>
+      <title>cowboy:start_tls(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_tls/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_tls/</guid>
+      <description>Name cowboy:start_tls - Listen for connections using TLS
+Description start_tls(Name :: ranch:ref(), TransportOpts :: ranch_ssl:opts(), ProtocolOpts :: opts()) -&amp;gt; {ok, ListenerPid :: pid()} | {error, any()}  Start listening for connections over a secure TLS channel.
+Both HTTP/1.1 and HTTP/2 are supported on this listener. The ALPN TLS extension must be used to initiate an HTTP/2 connection.
+Arguments Name The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</description>
+    </item>
+    
     <item>
       <title>cowboy:start_tls(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.start_tls/</link>
@@ -6065,6 +6607,21 @@ The name of the listener is the first argument given to the cowboy:start_clear(3
 The {error, not_found} tuple is returned when the listener does not exist.</description>
     </item>
     
+    <item>
+      <title>cowboy:stop_listener(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.stop_listener/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.stop_listener/</guid>
+      <description>Name cowboy:stop_listener - Stop the given listener
+Description stop_listener(Name :: ranch:ref()) -&amp;gt; ok | {error, not_found}.  Stop a previously started listener.
+Alias of ranch:stop_listener(3).
+Arguments Name The name of the listener to be stopped.
+The name of the listener is the first argument given to the cowboy:start_clear(3), cowboy:start_tls(3) or ranch:start_listener(3) function.
+  Return value The atom ok is returned on success.
+The {error, not_found} tuple is returned when the listener does not exist.</description>
+    </item>
+    
     <item>
       <title>cowboy:stop_listener(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.stop_listener/</link>
@@ -6158,6 +6715,17 @@ Description The module cowboy_compress_h compresses response bodies automaticall
 Normal responses will only be compressed when their size is lower than the configured threshold. Streamed responses are always compressed, including when the sendfile command is used. Because the file must be read in memory to be compressed, this module is not suitable for automatically compressing large files.</description>
     </item>
     
+    <item>
+      <title>cowboy_compress_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_compress_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_compress_h/</guid>
+      <description>Name cowboy_compress_h - Compress stream handler
+Description The module cowboy_compress_h compresses response bodies automatically when the client supports it. It will not try to compress responses that already have a content encoding or that have an etag header defined.
+Normal responses will only be compressed when their size is lower than the configured threshold. Streamed responses are always compressed, including when the sendfile command is used. Because the file must be read in memory to be compressed, this module is not suitable for automatically compressing large files.</description>
+    </item>
+    
     <item>
       <title>cowboy_compress_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_compress_h/</link>
@@ -6241,6 +6809,19 @@ Exports Built-in constraints:
 cowboy_constraints:int(3) - Integer constraint  cowboy_constraints:nonempty(3) - Non-empty constraint   Types constraint() constraint() :: int | nonempty | fun()  A constraint function.</description>
     </item>
     
+    <item>
+      <title>cowboy_constraints(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints/</guid>
+      <description>Name cowboy_constraints - Constraints
+Description The module cowboy_constraints defines the built-in constraints in Cowboy and provides an interface for manipulating these constraints.
+Constraints are functions that define what type of input is allowed. They are used throughout Cowboy, from the router to query strings to cookies.
+Exports Built-in constraints:
+cowboy_constraints:int(3) - Integer constraint  cowboy_constraints:nonempty(3) - Non-empty constraint   Types constraint() constraint() :: int | nonempty | fun()  A constraint function.</description>
+    </item>
+    
     <item>
       <title>cowboy_constraints(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints/</link>
@@ -6332,6 +6913,19 @@ int(reverse, Int) -&amp;gt; {ok, Bin} | {error, not_an_integer}  Convert an inte
 int(format_error, Error) -&amp;gt; HumanReadable Error :: {not_an_integer, Bin | Int} HumanReadable :: iolist()  Generate a human-readable error message.</description>
     </item>
     
+    <item>
+      <title>cowboy_constraints:int(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.int/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.int/</guid>
+      <description>Name cowboy_constraints:int - Integer constraint
+Description Constraint functions implement a number of different operations.
+int(forward, Bin) -&amp;gt; {ok, Int} | {error, not_an_integer} Bin :: binary() Int :: integer()  Validate and convert the text representation of an integer.
+int(reverse, Int) -&amp;gt; {ok, Bin} | {error, not_an_integer}  Convert an integer back to its text representation.
+int(format_error, Error) -&amp;gt; HumanReadable Error :: {not_an_integer, Bin | Int} HumanReadable :: iolist()  Generate a human-readable error message.</description>
+    </item>
+    
     <item>
       <title>cowboy_constraints:int(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints.int/</link>
@@ -6426,6 +7020,20 @@ nonempty(format_error, Error) -&amp;gt; HumanReadable Error :: {empty, Bin} Huma
 Arguments Arguments vary depending on the operation. Constraint functions always take the operation type as first argument, and the value as second argument.</description>
     </item>
     
+    <item>
+      <title>cowboy_constraints:nonempty(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/</guid>
+      <description>Name cowboy_constraints:nonempty - Non-empty constraint
+Description Constraint functions implement a number of different operations.
+nonempty(forward | reverse, &amp;lt;&amp;lt;&amp;gt;&amp;gt;) -&amp;gt; {error, empty}  Reject empty values.
+nonempty(forward | reverse, Bin) -&amp;gt; {ok, Bin} Bin :: binary()  Accept any other binary values.
+nonempty(format_error, Error) -&amp;gt; HumanReadable Error :: {empty, Bin} HumanReadable :: iolist()  Generate a human-readable error message.
+Arguments Arguments vary depending on the operation. Constraint functions always take the operation type as first argument, and the value as second argument.</description>
+    </item>
+    
     <item>
       <title>cowboy_constraints:nonempty(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints.nonempty/</link>
@@ -6506,6 +7114,18 @@ The only compression algorithm currently supported is the gzip algorithm. Anothe
 This stream handler always adds a field to the Req object with the name content_decoded which is treated as a list of decoded content-encoding values.</description>
     </item>
     
+    <item>
+      <title>cowboy_decompress_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_decompress_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_decompress_h/</guid>
+      <description>Name cowboy_decompress_h - Decompress stream handler
+Description The module cowboy_decompress_h decompresses request bodies automatically when the server supports it.
+The only compression algorithm currently supported is the gzip algorithm. Another limitation is that decompression is only attempted when gzip is the only content-encoding in the request.
+This stream handler always adds a field to the Req object with the name content_decoded which is treated as a list of decoded content-encoding values.</description>
+    </item>
+    
     <item>
       <title>cowboy_handler(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy_handler/</link>
@@ -6544,10 +7164,10 @@ This module also defines a callback interface for handling HTTP requests.</descr
     
     <item>
       <title>cowboy_handler(3)</title>
-      <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler/</link>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler/</guid>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler/</guid>
       <description>Name cowboy_handler - Plain HTTP handlers
 Description The cowboy_handler middleware executes the handler selected by the router or any other preceding middleware.
 This middleware takes the handler module and initial state from the handler and handler_opts environment values, respectively. On completion, it adds a result value to the middleware environment, containing the return value of the terminate/3 callback (if defined) and ok otherwise.
@@ -6556,7 +7176,19 @@ This module also defines a callback interface for handling HTTP requests.</descr
     
     <item>
       <title>cowboy_handler(3)</title>
-      <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_handler/</link>
+      <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler/</guid>
+      <description>Name cowboy_handler - Plain HTTP handlers
+Description The cowboy_handler middleware executes the handler selected by the router or any other preceding middleware.
+This middleware takes the handler module and initial state from the handler and handler_opts environment values, respectively. On completion, it adds a result value to the middleware environment, containing the return value of the terminate/3 callback (if defined) and ok otherwise.
+This module also defines a callback interface for handling HTTP requests.</description>
+    </item>
+    
+    <item>
+      <title>cowboy_handler(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_handler/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
       <guid>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_handler/</guid>
@@ -6632,6 +7264,20 @@ Arguments Reason Reason for termination.
 It is possible to remove fields from the Req object to save memory when the handler has no concept of requests/responses.</description>
     </item>
     
+    <item>
+      <title>cowboy_handler:terminate(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/</guid>
+      <description>Name cowboy_handler:terminate - Terminate the handler
+Description terminate(Reason, PartialReq, State, Handler) -&amp;gt; ok Reason :: any() PartialReq :: map() State :: any() Handler :: module()  Call the optional terminate callback if it is defined.
+Make sure to use this function at the end of the execution of modules that implement custom handler behaviors.
+Arguments Reason Reason for termination.
+ PartialReq The Req object.
+It is possible to remove fields from the Req object to save memory when the handler has no concept of requests/responses.</description>
+    </item>
+    
     <item>
       <title>cowboy_handler:terminate(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler.terminate/</link>
@@ -6721,6 +7367,17 @@ Description The module cowboy_http implements HTTP/1.1 and HTTP/1.0 as a Ranch p
 Options opts() :: #{ active_n =&amp;gt; pos_integer(), chunked =&amp;gt; boolean(), connection_type =&amp;gt; worker | supervisor, http10_keepalive =&amp;gt; boolean(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_stream_flow_size =&amp;gt; non_neg_integer(), linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_empty_lines =&amp;gt; non_neg_integer(), max_header_name_length =&amp;gt; non_neg_integer(), max_header_value_length =&amp;gt; non_neg_integer(), max_headers =&amp;gt; non_neg_integer(), max_keepalive =&amp;gt; non_neg_integer(), max_method_length =&amp;gt; non_neg_integer(), max_request_line_length =&amp;gt; non_neg_integer(), max_skip_body_length =&amp;gt; non_neg_integer(), proxy_header =&amp;gt; boolean(), request_timeout =&amp;gt; timeout(), reset_idle_timeout_on_send =&amp;gt; boolean(), sendfile =&amp;gt; boolean(), stream_handlers =&amp;gt; [module()] }  Configuration for the HTTP/1.</description>
     </item>
     
+    <item>
+      <title>cowboy_http(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http/</guid>
+      <description>Name cowboy_http - HTTP/1.1
+Description The module cowboy_http implements HTTP/1.1 and HTTP/1.0 as a Ranch protocol.
+Options opts() :: #{ active_n =&amp;gt; pos_integer(), alpn_default_protocol =&amp;gt; http | http2, chunked =&amp;gt; boolean(), connection_type =&amp;gt; worker | supervisor, dynamic_buffer =&amp;gt; false | {pos_integer(), pos_integer()}, hibernate =&amp;gt; boolean(), http10_keepalive =&amp;gt; boolean(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_stream_flow_size =&amp;gt; non_neg_integer(), linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_empty_lines =&amp;gt; non_neg_integer(), max_header_name_length =&amp;gt; non_neg_integer(), max_header_value_length =&amp;gt; non_neg_integer(), max_headers =&amp;gt; non_neg_integer(), max_keepalive =&amp;gt; non_neg_integer(), max_method_length =&amp;gt; non_neg_integer(), max_request_line_length =&amp;gt; non_neg_integer(), max_skip_body_length =&amp;gt; non_neg_integer(), protocols =&amp;gt; [http | http2], proxy_header =&amp;gt; boolean(), request_timeout =&amp;gt; timeout(), reset_idle_timeout_on_send =&amp;gt; boolean(), sendfile =&amp;gt; boolean(), stream_handlers =&amp;gt; [module()] }  Configuration for the HTTP/1.</description>
+    </item>
+    
     <item>
       <title>cowboy_http(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_http/</link>
@@ -6798,6 +7455,17 @@ Description The module cowboy_http2 implements HTTP/2 as a Ranch protocol.
 Options opts() :: #{ active_n =&amp;gt; pos_integer(), connection_type =&amp;gt; worker | supervisor, connection_window_margin_size =&amp;gt; 0..16#7fffffff, connection_window_update_threshold =&amp;gt; 0..16#7fffffff, enable_connect_protocol =&amp;gt; boolean(), goaway_initial_timeout =&amp;gt; timeout(), goaway_complete_timeout =&amp;gt; timeout(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_connection_window_size =&amp;gt; 65535..16#7fffffff, initial_stream_window_size =&amp;gt; 0..16#7fffffff, linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_concurrent_streams =&amp;gt; non_neg_integer() | infinity, max_connection_buffer_size =&amp;gt; non_neg_integer(), max_connection_window_size =&amp;gt; 0..16#7fffffff, max_decode_table_size =&amp;gt; non_neg_integer(), max_encode_table_size =&amp;gt; non_neg_integer(), max_fragmented_header_block_size =&amp;gt; 16384.</description>
     </item>
     
+    <item>
+      <title>cowboy_http2(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http2/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http2/</guid>
+      <description>Name cowboy_http2 - HTTP/2
+Description The module cowboy_http2 implements HTTP/2 as a Ranch protocol.
+Options opts() :: #{ active_n =&amp;gt; pos_integer(), alpn_default_protocol =&amp;gt; http | http2, connection_type =&amp;gt; worker | supervisor, connection_window_margin_size =&amp;gt; 0..16#7fffffff, connection_window_update_threshold =&amp;gt; 0..16#7fffffff, dynamic_buffer =&amp;gt; false | {pos_integer(), pos_integer()}, enable_connect_protocol =&amp;gt; boolean(), goaway_initial_timeout =&amp;gt; timeout(), goaway_complete_timeout =&amp;gt; timeout(), hibernate =&amp;gt; boolean(), idle_timeout =&amp;gt; timeout(), inactivity_timeout =&amp;gt; timeout(), initial_connection_window_size =&amp;gt; 65535..16#7fffffff, initial_stream_window_size =&amp;gt; 0..16#7fffffff, linger_timeout =&amp;gt; timeout(), logger =&amp;gt; module(), max_concurrent_streams =&amp;gt; non_neg_integer() | infinity, max_connection_buffer_size =&amp;gt; non_neg_integer(), max_connection_window_size =&amp;gt; 0.</description>
+    </item>
+    
     <item>
       <title>cowboy_http2(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_http2/</link>
@@ -6881,6 +7549,19 @@ There are generally two usage patterns:
 Loop until receiving a specific message, then send a response and stop execution (for example long polling);  Or initiate a response in init/2 and stream the body in info/3 as necessary (for example server-sent events).</description>
     </item>
     
+    <item>
+      <title>cowboy_loop(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_loop/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_loop/</guid>
+      <description>Name cowboy_loop - Loop handlers
+Description The module cowboy_loop defines a callback interface for long running HTTP connections.
+You should switch to this behavior for long polling, server-sent events and similar long-running requests.
+There are generally two usage patterns:
+Loop until receiving a specific message, then send a response and stop execution (for example long polling);  Or initiate a response in init/2 and stream the body in info/3 as necessary (for example server-sent events).</description>
+    </item>
+    
     <item>
       <title>cowboy_loop(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_loop/</link>
@@ -6966,6 +7647,17 @@ Description The module cowboy_metrics_h gathers metrics and other information ab
 Types metrics() metrics() :: #{ %% The identifier for this listener. ref := ranch:ref(), %% The pid for this connection. pid := pid(), %% The streamid also indicates the total number of requests on %% this connection (StreamID div 2 + 1). streamid := cowboy_stream:streamid(), %% The terminate reason is always useful.</description>
     </item>
     
+    <item>
+      <title>cowboy_metrics_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_metrics_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_metrics_h/</guid>
+      <description>Name cowboy_metrics_h - Metrics stream handler
+Description The module cowboy_metrics_h gathers metrics and other information about a stream. It then calls the configured callback with this data.
+Types metrics() metrics() :: #{ %% The identifier for this listener. ref := ranch:ref(), %% The pid for this connection. pid := pid(), %% The streamid also indicates the total number of requests on %% this connection (StreamID div 2 + 1). streamid := cowboy_stream:streamid(), %% The terminate reason is always useful.</description>
+    </item>
+    
     <item>
       <title>cowboy_metrics_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_metrics_h/</link>
@@ -7038,6 +7730,19 @@ Callbacks Middlewares implement the following interface:
 execute(Req, Env) -&amp;gt; {ok, Req, Env} | {suspend, module(), atom(), [any()]} | {stop, Req} Req :: cowboy_req:req() Env :: cowboy_middleware:env()  The execute/2 is the only callback that needs to be implemented. It must execute the middleware and return with instructions for Cowboy.</description>
     </item>
     
+    <item>
+      <title>cowboy_middleware(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_middleware/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_middleware/</guid>
+      <description>Name cowboy_middleware - Middlewares
+Description The module cowboy_middleware defines a callback interface for Cowboy middlewares.
+Middlewares process the request sequentially in the order they are configured.
+Callbacks Middlewares implement the following interface:
+execute(Req, Env) -&amp;gt; {ok, Req, Env} | {suspend, module(), atom(), [any()]} | {stop, Req} Req :: cowboy_req:req() Env :: cowboy_middleware:env()  The execute/2 is the only callback that needs to be implemented. It must execute the middleware and return with instructions for Cowboy.</description>
+    </item>
+    
     <item>
       <title>cowboy_middleware(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_middleware/</link>
@@ -7126,6 +7831,18 @@ There are four types of functions in this module. They can be differentiated by
 Type Name pattern Return type access no verb, parse_*, match_* Value  question has_* boolean()  modification set_* Req  action any other verb ok | {Result, Value, Req}   Any Req returned must be used in place of the one passed as argument.</description>
     </item>
     
+    <item>
+      <title>cowboy_req(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req/</guid>
+      <description>Name cowboy_req - HTTP request and response
+Description The module cowboy_req provides functions to access, manipulate and respond to requests.
+There are four types of functions in this module. They can be differentiated by their name and their return type:
+Type Name pattern Return type access no verb, parse_*, match_* Value  question has_* boolean()  modification set_* Req  action any other verb ok | {Result, Value, Req}   Any Req returned must be used in place of the one passed as argument.</description>
+    </item>
+    
     <item>
       <title>cowboy_req(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req/</link>
@@ -7216,6 +7933,20 @@ Arguments Name Desired binding name as an atom.
   Return value By default the value is a case sensitive binary string, however constraints may change the type of this value (for example automatically converting numbers to integer).</description>
     </item>
     
+    <item>
+      <title>cowboy_req:binding(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.binding/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.binding/</guid>
+      <description>Name cowboy_req:binding - Access a value bound from the route
+Description binding(Name, Req) -&amp;gt; binding(Name, Req, undefined) binding(Name, Req, Default) -&amp;gt; any() | Default Name :: atom() Req :: cowboy_req:req() Default :: any()  Return the value for the given binding.
+Arguments Name Desired binding name as an atom.
+ Req The Req object.
+ Default Default value returned when the binding is missing.
+  Return value By default the value is a case sensitive binary string, however constraints may change the type of this value (for example automatically converting numbers to integer).</description>
+    </item>
+    
     <item>
       <title>cowboy_req:binding(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.binding/</link>
@@ -7311,6 +8042,19 @@ Arguments Req The Req object.
 Changelog 2.0: Only the values are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:bindings(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.bindings/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.bindings/</guid>
+      <description>Name cowboy_req:bindings - Access all values bound from the route
+Description bindings(Req :: cowboy_req:req()) -&amp;gt; cowboy_router:bindings()  Return a map containing all bindings.
+Arguments Req The Req object.
+  Return value By default values are case sensitive binary strings, however constraints may change the type of this value (for example automatically converting numbers to integer).
+Changelog 2.0: Only the values are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:bindings(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.bindings/</link>
@@ -7402,6 +8146,19 @@ Arguments Req The Req object.
   Return value The length of the request body, or undefined if it is not known.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:body_length(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.body_length/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.body_length/</guid>
+      <description>Name cowboy_req:body_length - Body length
+Description body_length(Req :: cowboy_req:req()) -&amp;gt; undefined | non_neg_integer()  Return the length of the request body.
+The length is not always known before reading the body. In those cases Cowboy will return undefined. The body length is available after the body has been fully read.
+Arguments Req The Req object.
+  Return value The length of the request body, or undefined if it is not known.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:body_length(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.body_length/</link>
@@ -7499,6 +8256,21 @@ Arguments Event The event to be sent to stream handlers.
 Changelog 2.7: Function introduced.   Examples Read the body using auto mode read_body_auto_async(Req) -&amp;gt; read_body_auto_async(Req, make_ref(), &amp;lt;&amp;lt;&amp;gt;&amp;gt;).</description>
     </item>
     
+    <item>
+      <title>cowboy_req:cast(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cast/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cast/</guid>
+      <description>Name cowboy_req:cast - Cast a stream handler event
+Description cast(Event :: any(), Req :: cowboy_req:req()) -&amp;gt; ok  Cast a stream handler event.
+The event will be passed to stream handlers through the info/3 callback.
+Arguments Event The event to be sent to stream handlers.
+ Req The Req object.
+  Return value The atom ok is always returned. It can be safely ignored.
+Changelog 2.7: Function introduced.   Examples Read the body using auto mode read_body_auto_async(Req) -&amp;gt; read_body_auto_async(Req, make_ref(), &amp;lt;&amp;lt;&amp;gt;&amp;gt;).</description>
+    </item>
+    
     <item>
       <title>cowboy_req:cast(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_req.cast/</link>
@@ -7580,6 +8352,18 @@ Using the default configuration this function will always return undefined. You
 {ok, _} = cowboy:start_tls(example, [ {port, 8443}, {certfile, &#34;path/to/cert.pem&#34;}, {verify, verify_peer} ], #{ env =&amp;gt; #{dispatch =&amp;gt; Dispatch} }).</description>
     </item>
     
+    <item>
+      <title>cowboy_req:cert(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cert/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cert/</guid>
+      <description>Name cowboy_req:cert - Client TLS certificate
+Description cert(Req :: cowboy_req:req()) -&amp;gt; binary() | undefined  Return the peer&amp;apos;s TLS certificate.
+Using the default configuration this function will always return undefined. You need to explicitly configure Cowboy to request the client certificate. To do this you need to set the verify transport option to verify_peer:
+{ok, _} = cowboy:start_tls(example, [ {port, 8443}, {certfile, &#34;path/to/cert.pem&#34;}, {verify, verify_peer} ], #{ env =&amp;gt; #{dispatch =&amp;gt; Dispatch} }).</description>
+    </item>
+    
     <item>
       <title>cowboy_req:cert(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.cert/</link>
@@ -7670,6 +8454,20 @@ Arguments Name Header name as a lowercase binary string.
   Return value A new Req object is returned.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:delete_resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/</guid>
+      <description>Name cowboy_req:delete_resp_header - Delete a response header
+Description delete_resp_header(Name, Req :: cowboy_req:req()) -&amp;gt; Req Name :: binary() %% lowercase; case insensitive  Delete the given response header.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Arguments Name Header name as a lowercase binary string.
+ Req The Req object.
+  Return value A new Req object is returned.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:delete_resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.delete_resp_header/</link>
@@ -7762,6 +8560,18 @@ This function is meant to be used before attempting to parse or match cookies in
 Malformed cookies are unfortunately fairly common due to the string-based interface provided by browsers and this function provides a middle ground between Cowboy&amp;apos;s strict behavior and chaotic real world use cases.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:filter_cookies(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/</guid>
+      <description>Name cowboy_req:filter_cookies - Filter cookie headers
+Description filter_cookies(Names, Req) -&amp;gt; Req Names :: [atom() | binary()]  Filter cookie headers.
+This function is meant to be used before attempting to parse or match cookies in order to remove cookies that are not relevant and are potentially malformed. Because Cowboy by default crashes on malformed cookies, this function allows processing requests that would otherwise result in a 400 error.
+Malformed cookies are unfortunately fairly common due to the string-based interface provided by browsers and this function provides a middle ground between Cowboy&amp;apos;s strict behavior and chaotic real world use cases.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:filter_cookies(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_req.filter_cookies/</link>
@@ -7837,6 +8647,19 @@ Arguments Req The Req object.
 Changelog 1.0: Function introduced.   Examples Ensure the request has a body true = cowboy_req:has_body(Req).  See also cowboy_req(3), cowboy_req:body_length(3), cowboy_req:read_body(3), cowboy_req:read_urlencoded_body(3), cowboy_req:read_part(3), cowboy_req:read_part_body(3)</description>
     </item>
     
+    <item>
+      <title>cowboy_req:has_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_body/</guid>
+      <description>Name cowboy_req:has_body - Is there a request body?
+Description has_body(Req :: cowboy_req:req()) -&amp;gt; boolean()  Return whether the request has a body.
+Arguments Req The Req object.
+  Return value A boolean indicating whether the request has a body.
+Changelog 1.0: Function introduced.   Examples Ensure the request has a body true = cowboy_req:has_body(Req).  See also cowboy_req(3), cowboy_req:body_length(3), cowboy_req:read_body(3), cowboy_req:read_urlencoded_body(3), cowboy_req:read_part(3), cowboy_req:read_part_body(3)</description>
+    </item>
+    
     <item>
       <title>cowboy_req:has_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_body/</link>
@@ -7931,6 +8754,20 @@ This function will return false when an empty response body has been set.
 Changelog 1.0: Function introduced.   Examples Check whether a body has been set false = cowboy_req:has_resp_body(Req0), Req1 = cowboy_req:set_resp_body(&amp;lt;&amp;lt;&#34;</description>
     </item>
     
+    <item>
+      <title>cowboy_req:has_resp_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/</guid>
+      <description>Name cowboy_req:has_resp_body - Is there a response body?
+Description has_resp_body(Req :: cowboy_req:req()) -&amp;gt; boolean()  Return whether a response body has been set.
+Arguments Req The Req object.
+  Return value A boolean indicating whether a response body has been set.
+This function will return false when an empty response body has been set.
+Changelog 1.0: Function introduced.   Examples Check whether a body has been set false = cowboy_req:has_resp_body(Req0), Req1 = cowboy_req:set_resp_body(&amp;lt;&amp;lt;&#34;</description>
+    </item>
+    
     <item>
       <title>cowboy_req:has_resp_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_body/</link>
@@ -8023,6 +8860,18 @@ The header name must be given as a lowercase binary string. While header names a
 Arguments Name Header name as a lowercase binary string.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:has_resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/</guid>
+      <description>Name cowboy_req:has_resp_header - Is the given response header set?
+Description has_resp_header(Name, Req :: cowboy_req:req()) -&amp;gt; boolean() Name :: binary() %% lowercase; case insensitive  Return whether the given response header has been set.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Arguments Name Header name as a lowercase binary string.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:has_resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_header/</link>
@@ -8107,6 +8956,18 @@ The header name must be given as a lowercase binary string. While header names a
 Headers can also be obtained using pattern matching:</description>
     </item>
     
+    <item>
+      <title>cowboy_req:header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.header/</guid>
+      <description>Name cowboy_req:header - HTTP header
+Description header(Name, Req) -&amp;gt; header(Name, Req, undefined) header(Name, Req, Default) -&amp;gt; binary() | Default Name :: binary() %% lowercase; case insensitive Req :: cowboy_req:req() Default :: any()  Return the value for the given HTTP header.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Headers can also be obtained using pattern matching:</description>
+    </item>
+    
     <item>
       <title>cowboy_req:header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.header/</link>
@@ -8197,6 +9058,20 @@ Request headers can also be obtained using pattern matching:
 Changelog 2.0: Only the headers are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:headers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.headers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.headers/</guid>
+      <description>Name cowboy_req:headers - HTTP headers
+Description headers(Req :: cowboy_req:req()) -&amp;gt; cowboy:http_headers()  Return all request headers.
+Request headers can also be obtained using pattern matching:
+#{headers := Headers} = Req.  Arguments Req The Req object.
+  Return value Headers are returned as a map with keys being lowercase binary strings, and values as binary strings.
+Changelog 2.0: Only the headers are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:headers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.headers/</link>
@@ -8295,6 +9170,20 @@ The host name can also be obtained using pattern matching:
 Changelog 2.0: Only the host name is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:host(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host/</guid>
+      <description>Name cowboy_req:host - URI host name
+Description host(Req :: cowboy_req:req()) -&amp;gt; Host :: binary()  Return the host name of the effective request URI.
+The host name can also be obtained using pattern matching:
+#{host := Host} = Req.  Arguments Req The Req object.
+  Return value The host name is returned as a lowercase binary string. It is case insensitive.
+Changelog 2.0: Only the host name is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:host(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.host/</link>
@@ -8393,6 +9282,20 @@ Arguments Req The Req object.
 Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:host_info(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host_info/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host_info/</guid>
+      <description>Name cowboy_req:host_info - Access the route&amp;apos;s heading host segments
+Description host_info(Req :: cowboy_req:req()) -&amp;gt; cowboy_router:tokens()  Return the tokens for the heading host segments.
+This is the part of the host name that was matched using the ... notation.
+Arguments Req The Req object.
+  Return value The tokens are returned as a list of case insensitive binary strings.
+Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:host_info(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.host_info/</link>
@@ -8485,6 +9388,18 @@ Informational responses use a status code between 100 and 199. They cannot inclu
 Any number of informational responses can be sent as long as they are sent before the proper response.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:inform(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.inform/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.inform/</guid>
+      <description>Name cowboy_req:inform - Send an informational response
+Description inform(Status, Req :: cowboy_req:req()) -&amp;gt; inform(StatusCode, #{}, Req) inform(Status, Headers, Req :: cowboy_req:req()) -&amp;gt; ok Status :: cowboy:http_status() Headers :: cowboy:http_headers()  Send an informational response.
+Informational responses use a status code between 100 and 199. They cannot include a body. This function will not use any of the previously set headers. All headers to be sent must be given directly.
+Any number of informational responses can be sent as long as they are sent before the proper response.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:inform(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.inform/</link>
@@ -8566,6 +9481,17 @@ Description match_cookies(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&
 Cowboy will only return the cookie values specified in the fields list, and ignore all others. Fields can be either the name of the cookie requested; the name along with a list of constraints; or the name, a list of constraints and a default value in case the cookie is missing.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:match_cookies(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/</guid>
+      <description>Name cowboy_req:match_cookies - Match cookies against constraints
+Description match_cookies(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&amp;gt; #{atom() =&amp;gt; any()}  Parse the cookies and match specific values against constraints.
+Cowboy will only return the cookie values specified in the fields list, and ignore all others. Fields can be either the name of the cookie requested; the name along with a list of constraints; or the name, a list of constraints and a default value in case the cookie is missing.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:match_cookies(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.match_cookies/</link>
@@ -8643,6 +9569,17 @@ Description match_qs(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&amp;g
 Cowboy will only return the query string values specified in the fields list, and ignore all others. Fields can be either the key requested; the key along with a list of constraints; or the key, a list of constraints and a default value in case the key is missing.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:match_qs(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/</guid>
+      <description>Name cowboy_req:match_qs - Match the query string against constraints
+Description match_qs(Fields :: cowboy:fields(), Req :: cowboy_req:req()) -&amp;gt; #{atom() =&amp;gt; any()}  Parse the query string and match specific values against constraints.
+Cowboy will only return the query string values specified in the fields list, and ignore all others. Fields can be either the key requested; the key along with a list of constraints; or the key, a list of constraints and a default value in case the key is missing.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:match_qs(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.match_qs/</link>
@@ -8729,6 +9666,20 @@ The method can also be obtained using pattern matching:
 Changelog 2.0: Only the method is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:method(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.method/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.method/</guid>
+      <description>Name cowboy_req:method - HTTP method
+Description method(Req :: cowboy_req:req()) -&amp;gt; Method :: binary()  Return the request&amp;apos;s HTTP method.
+The method can also be obtained using pattern matching:
+#{method := Method} = Req.  Arguments Req The Req object.
+  Return value The request&amp;apos;s HTTP method is returned as a binary string. While methods are case sensitive, standard methods are always uppercase.
+Changelog 2.0: Only the method is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:method(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.method/</link>
@@ -8824,6 +9775,19 @@ When the cookie header is missing or empty, [] is returned.
 This function will crash on invalid cookie data. Because invalid cookies are fairly common when dealing with browsers (because of the string interface that the Javascript API provides), it is recommended to filter the cookie header value before attempting to parse it.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:parse_cookies(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/</guid>
+      <description>Name cowboy_req:parse_cookies - Parse cookie headers
+Description parse_cookies(Req) -&amp;gt; [{Name, Value}] Name :: binary() %% case sensitive Value :: binary() %% case sensitive  Parse cookie headers.
+Alias for cowboy_req:parse_header(&amp;lt;&amp;lt;&amp;quot;cookie&amp;quot;&amp;gt;&amp;gt;, Req).
+When the cookie header is missing or empty, [] is returned.
+This function will crash on invalid cookie data. Because invalid cookies are fairly common when dealing with browsers (because of the string interface that the Javascript API provides), it is recommended to filter the cookie header value before attempting to parse it.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:parse_cookies(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_cookies/</link>
@@ -8914,6 +9878,18 @@ The header name must be given as a lowercase binary string. While header names a
 The type of the parsed value varies depending on the header.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:parse_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/</guid>
+      <description>Name cowboy_req:parse_header - Parse the given HTTP header
+Description parse_header(Name, Req) -&amp;gt; ParsedValue | Default parse_header(Name, Req, Default) -&amp;gt; ParsedValue | Default Name :: binary() Req :: cowboy_req:req() ParsedValue :: any() Default :: any()  Parse the given HTTP header.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+The type of the parsed value varies depending on the header.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:parse_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_header/</link>
@@ -8998,6 +9974,18 @@ Arguments Req The Req object.
   Return value The parsed query string is returned as a list of key/value pairs. The key is a binary string. The value is either a binary string, or the atom true. Both key and value are case sensitive.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:parse_qs(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/</guid>
+      <description>Name cowboy_req:parse_qs - Parse the query string
+Description parse_qs(Req :: cowboy_req:req()) -&amp;gt; [{Key :: binary(), Value :: binary() | true}]  Parse the query string as a list of key/value pairs.
+Arguments Req The Req object.
+  Return value The parsed query string is returned as a list of key/value pairs. The key is a binary string. The value is either a binary string, or the atom true. Both key and value are case sensitive.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:parse_qs(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_qs/</link>
@@ -9088,6 +10076,20 @@ The path can also be obtained using pattern matching:
 Changelog 2.0: Only the path is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:path(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path/</guid>
+      <description>Name cowboy_req:path - URI path
+Description path(Req :: cowboy_req:req()) -&amp;gt; Path :: binary()  Return the path of the effective request URI.
+The path can also be obtained using pattern matching:
+#{path := Path} = Req.  Arguments Req The Req object.
+  Return value The path is returned as a binary string. It is case sensitive.
+Changelog 2.0: Only the path is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:path(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.path/</link>
@@ -9186,6 +10188,20 @@ Arguments Req The Req object.
 Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:path_info(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path_info/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path_info/</guid>
+      <description>Name cowboy_req:path_info - Access the route&amp;apos;s trailing path segments
+Description path_info(Req :: cowboy_req:req()) -&amp;gt; cowboy_router:tokens()  Return the tokens for the trailing path segments.
+This is the part of the host name that was matched using the ... notation.
+Arguments Req The Req object.
+  Return value The tokens are returned as a list of case sensitive binary strings.
+Changelog 2.0: Only the tokens are returned, they are no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:path_info(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.path_info/</link>
@@ -9284,6 +10300,20 @@ The peer information can also be obtained using pattern matching:
 The peer is not necessarily the client&amp;apos;s IP address and port. It is the IP address of the endpoint connecting directly to the server, which may be a gateway or a proxy.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:peer(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.peer/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.peer/</guid>
+      <description>Name cowboy_req:peer - Peer address and port
+Description peer(Req :: cowboy_req:req()) -&amp;gt; Info Info :: {inet:ip_address(), inet:port_number()}  Return the peer&amp;apos;s IP address and port number.
+The peer information can also be obtained using pattern matching:
+#{peer := {IP, Port}} = Req.  Arguments Req The Req object.
+  Return value The peer&amp;apos;s IP address and port number.
+The peer is not necessarily the client&amp;apos;s IP address and port. It is the IP address of the endpoint connecting directly to the server, which may be a gateway or a proxy.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:peer(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.peer/</link>
@@ -9379,6 +10409,19 @@ The port number can also be obtained using pattern matching:
 #{port := Port} = Req.  Arguments Req The Req object.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:port(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.port/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.port/</guid>
+      <description>Name cowboy_req:port - URI port number
+Description port(Req :: cowboy_req:req()) -&amp;gt; Port :: inet:port_number()  Return the port number of the effective request URI.
+Note that the port number returned by this function is obtained by parsing the host header. It may be different from the port the peer used to connect to Cowboy.
+The port number can also be obtained using pattern matching:
+#{port := Port} = Req.  Arguments Req The Req object.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:port(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.port/</link>
@@ -9464,6 +10507,17 @@ Description push(Path, Headers, Req :: cowboy_req:req()) -&amp;gt; push(Path, He
 Cowboy handles push requests the same way as if they came from the client, including the creation of a request handling process, routing and middlewares and so on.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:push(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.push/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.push/</guid>
+      <description>Name cowboy_req:push - Push a resource to the client
+Description push(Path, Headers, Req :: cowboy_req:req()) -&amp;gt; push(Path, Headers, Req, #{}) push(Path, Headers, Req :: cowboy_req:req(), Opts) -&amp;gt; ok Path :: iodata() %% case sensitive Headers :: cowboy:http_headers() Opts :: cowboy_req:push_opts()  Push a resource to the client.
+Cowboy handles push requests the same way as if they came from the client, including the creation of a request handling process, routing and middlewares and so on.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:push(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.push/</link>
@@ -9550,6 +10604,20 @@ The query string can also be obtained using pattern matching:
 Changelog 2.0: Only the query string is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:qs(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.qs/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.qs/</guid>
+      <description>Name cowboy_req:qs - URI query string
+Description qs(Req :: cowboy_req:req()) -&amp;gt; Qs :: binary()  Return the query string of the effective request URI.
+The query string can also be obtained using pattern matching:
+#{qs := Qs} = Req.  Arguments Req The Req object.
+  Return value The query string is returned as a binary string. It is case sensitive.
+Changelog 2.0: Only the query string is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:qs(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.qs/</link>
@@ -9639,6 +10707,17 @@ Description read_and_match_urlencoded_body(Fields, Req) -&amp;gt; read_and_match
 This function reads the request body and parses it as application/x-www-form-urlencoded. It then applies the given field constraints to the urlencoded data and returns the result as a map.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_and_match_urlencoded_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/</guid>
+      <description>Name cowboy_req:read_and_match_urlencoded_body - Read, parse and match a urlencoded request body against constraints
+Description read_and_match_urlencoded_body(Fields, Req) -&amp;gt; read_and_match_urlencoded_body(Fields, Req, #{}) read_and_match_urlencoded_body(Fields, Req, Opts) -&amp;gt; {ok, Body, Req} Fields :: cowboy:fields() Req :: cowboy_req:req() Opts :: cowboy_req:read_body_opts() Body :: #{atom() =&amp;gt; any()}  Read, parse and match a urlencoded request body against constraints.
+This function reads the request body and parses it as application/x-www-form-urlencoded. It then applies the given field constraints to the urlencoded data and returns the result as a map.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_and_match_urlencoded_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_and_match_urlencoded_body/</link>
@@ -9716,6 +10795,17 @@ Description read_body(Req :: cowboy_req:req()) -&amp;gt; read_body(Req, #{}) rea
 This function reads a chunk of the request body. A more tuple is returned when more data remains to be read. Call the function repeatedly until an ok tuple is returned to read the entire body.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_body/</guid>
+      <description>Name cowboy_req:read_body - Read the request body
+Description read_body(Req :: cowboy_req:req()) -&amp;gt; read_body(Req, #{}) read_body(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Data :: binary(), Req} | {more, Data :: binary(), Req} Opts :: cowboy_req:read_body_opts()  Read the request body.
+This function reads a chunk of the request body. A more tuple is returned when more data remains to be read. Call the function repeatedly until an ok tuple is returned to read the entire body.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_body/</link>
@@ -9793,6 +10883,17 @@ Description read_part(Req :: cowboy_req:req()) -&amp;gt; read_part(Req, #{}) rea
 This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function parses and returns headers.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_part(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part/</guid>
+      <description>Name cowboy_req:read_part - Read the next multipart headers
+Description read_part(Req :: cowboy_req:req()) -&amp;gt; read_part(Req, #{}) read_part(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Headers, Req} | {done, Req} Opts :: cowboy_req:read_body_opts() Headers :: #{binary() =&amp;gt; binary()}  Read the next part of a multipart body.
+This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function parses and returns headers.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_part(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_part/</link>
@@ -9870,6 +10971,17 @@ Description read_part_body(Req :: cowboy_req:req()) -&amp;gt; read_part_body(Req
 This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function returns the body of the current part.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_part_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/</guid>
+      <description>Name cowboy_req:read_part_body - Read the current part&amp;apos;s body
+Description read_part_body(Req :: cowboy_req:req()) -&amp;gt; read_part_body(Req, #{}) read_part_body(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Data :: binary(), Req} | {more, Data :: binary(), Req} Opts :: cowboy_req:read_body_opts()  Read the body of the current part of the multipart message.
+This function reads the request body and parses it as multipart. Each parts of a multipart representation have their own headers and body. This function returns the body of the current part.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_part_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_part_body/</link>
@@ -9950,6 +11062,18 @@ This function reads the request body and parses it as application/x-www-form-url
 The urlencoded media type is used by Web browsers when submitting HTML forms using the POST method.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:read_urlencoded_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/</guid>
+      <description>Name cowboy_req:read_urlencoded_body - Read and parse a urlencoded request body
+Description read_urlencoded_body(Req :: cowboy_req:req()) -&amp;gt; read_urlencoded_body(Req, #{}) read_urlencoded_body(Req :: cowboy_req:req(), Opts) -&amp;gt; {ok, Body, Req} Opts :: cowboy_req:read_body_opts() Body :: [{Key :: binary(), Value :: binary() | true}]  Read and parse a urlencoded request body.
+This function reads the request body and parses it as application/x-www-form-urlencoded. It returns a list of key/values.
+The urlencoded media type is used by Web browsers when submitting HTML forms using the POST method.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:read_urlencoded_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_urlencoded_body/</link>
@@ -10031,6 +11155,17 @@ Description reply(Status, Req :: cowboy_req:req()) -&amp;gt; reply(StatusCode, #
 The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:reply(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.reply/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.reply/</guid>
+      <description>Name cowboy_req:reply - Send the response
+Description reply(Status, Req :: cowboy_req:req()) -&amp;gt; reply(StatusCode, #{}, Req) reply(Status, Headers, Req :: cowboy_req:req()) -&amp;gt; Req reply(Status, Headers, Body, Req :: cowboy_req:req()) -&amp;gt; Req Status :: cowboy:http_status() Headers :: cowboy:http_headers() Body :: cowboy_req:resp_body()  Send the response.
+The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:reply(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.reply/</link>
@@ -10111,6 +11246,18 @@ The response header must have been set previously using cowboy_req:set_resp_head
 The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/</guid>
+      <description>Name cowboy_req:resp_header - Response header
+Description resp_header(Name, Req) -&amp;gt; resp_header(Name, Req, undefined) resp_header(Name, Req, Default) -&amp;gt; binary() | Default Name :: binary() %% lowercase; case insensitive Req :: cowboy_req:req() Default :: any()  Return the value for the given response header.
+The response header must have been set previously using cowboy_req:set_resp_header(3) or cowboy_req:set_resp_headers(3).
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.resp_header/</link>
@@ -10198,6 +11345,19 @@ Arguments Req The Req object.
 Changelog 2.0: Function introduced.   Examples Get all response headers Headers = cowboy_req:resp_headers(Req).  See also cowboy_req(3), cowboy_req:resp_header(3), cowboy_req:set_resp_header(3), cowboy_req:set_resp_headers(3)</description>
     </item>
     
+    <item>
+      <title>cowboy_req:resp_headers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/</guid>
+      <description>Name cowboy_req:resp_headers - Response headers
+Description resp_headers(Req :: cowboy_req:req()) -&amp;gt; cowboy:http_headers()  Return all response headers.
+Arguments Req The Req object.
+  Return value Headers are returned as a map with keys being lowercase binary strings, and values as binary strings.
+Changelog 2.0: Function introduced.   Examples Get all response headers Headers = cowboy_req:resp_headers(Req).  See also cowboy_req(3), cowboy_req:resp_header(3), cowboy_req:set_resp_header(3), cowboy_req:set_resp_headers(3)</description>
+    </item>
+    
     <item>
       <title>cowboy_req:resp_headers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.resp_headers/</link>
@@ -10295,6 +11455,21 @@ Cowboy will only set the scheme to &amp;lt;&amp;lt;&amp;quot;http&amp;quot;&amp;
 Changelog 2.0: Function introduced.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:scheme(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.scheme/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.scheme/</guid>
+      <description>Name cowboy_req:scheme - URI scheme
+Description scheme(Req :: cowboy_req:req()) -&amp;gt; Scheme :: binary()  Return the scheme of the effective request URI.
+The scheme can also be obtained using pattern matching:
+#{scheme := Scheme} = Req.  Arguments Req The Req object.
+  Return value The scheme is returned as a binary. It is case insensitive.
+Cowboy will only set the scheme to &amp;lt;&amp;lt;&amp;quot;http&amp;quot;&amp;gt;&amp;gt; or &amp;lt;&amp;lt;&amp;quot;https&amp;quot;&amp;gt;&amp;gt;.
+Changelog 2.0: Function introduced.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:scheme(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.scheme/</link>
@@ -10372,7 +11547,19 @@ This function can also be used to remove a response body that was set previously
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/</guid>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_req.set_resp_body/</guid>
+      <description>Name cowboy_req:set_resp_body - Set the response body
+Description set_resp_body(Body, Req :: cowboy_req:req()) -&amp;gt; Req Body :: cowboy_req:resp_body()  Set the response body.
+The response body will be sent when a reply is initiated. Note that the functions stream_reply/2,3 and reply/4 will override the body set by this function.
+This function can also be used to remove a response body that was set previously. To do so, simply call this function with an empty body.</description>
+    </item>
+    
+    <item>
+      <title>cowboy_req:set_resp_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</guid>
       <description>Name cowboy_req:set_resp_body - Set the response body
 Description set_resp_body(Body, Req :: cowboy_req:req()) -&amp;gt; Req Body :: cowboy_req:resp_body()  Set the response body.
 The response body will be sent when a reply is initiated. Note that the functions stream_reply/2,3 and reply/4 will override the body set by this function.
@@ -10381,10 +11568,10 @@ This function can also be used to remove a response body that was set previously
     
     <item>
       <title>cowboy_req:set_resp_body(3)</title>
-      <link>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</link>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/</link>
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
-      <guid>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</guid>
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/</guid>
       <description>Name cowboy_req:set_resp_body - Set the response body
 Description set_resp_body(Body, Req :: cowboy_req:req()) -&amp;gt; Req Body :: cowboy_req:resp_body()  Set the response body.
 The response body will be sent when a reply is initiated. Note that the functions stream_reply/2,3 and reply/4 will override the body set by this function.
@@ -10481,6 +11668,20 @@ Arguments Name Cookie name.
  Req The Req object.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:set_resp_cookie(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/</guid>
+      <description>Name cowboy_req:set_resp_cookie - Set a cookie
+Description set_resp_cookie(Name, Value, Req :: cowboy_req:req()) -&amp;gt; set_resp_cookie(Name, Value, Req, #{}) set_resp_cookie(Name, Value, Req :: cowboy_req:req(), Opts) -&amp;gt; Req Name :: binary() %% case sensitive Value :: iodata() %% case sensitive Opts :: cow_cookie:cookie_opts()  Set a cookie to be sent with the response.
+Note that cookie names are case sensitive.
+Arguments Name Cookie name.
+ Value Cookie value.
+ Req The Req object.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:set_resp_cookie(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_cookie/</link>
@@ -10573,6 +11774,18 @@ The header name must be given as a lowercase binary string. While header names a
 Cowboy does not allow duplicate header names.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:set_resp_header(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/</guid>
+      <description>Name cowboy_req:set_resp_header - Set a response header
+Description set_resp_header(Name, Value, Req :: cowboy_req:req()) -&amp;gt; Req Name :: binary() %% lowercase; case insensitive Value :: iodata() %% case depends on header  Set a header to be sent with the response.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Cowboy does not allow duplicate header names.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:set_resp_header(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_header/</link>
@@ -10657,6 +11870,18 @@ The header name must be given as a lowercase binary string. While header names a
 Cowboy does not allow duplicate header names. Headers set by this function may be overwritten by those set from the reply functions.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:set_resp_headers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/</guid>
+      <description>Name cowboy_req:set_resp_headers - Set several response headers
+Description set_resp_headers(Headers, Req :: cowboy_req:req()) -&amp;gt; Req Headers :: cowboy:http_headers() | [{binary(), iodata()}]  Set several headers to be sent with the response.
+The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Cowboy does not allow duplicate header names. Headers set by this function may be overwritten by those set from the reply functions.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:set_resp_headers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_headers/</link>
@@ -10747,6 +11972,20 @@ The socket information can also be obtained using pattern matching:
 Changelog 2.1: Function introduced.   Examples Get the socket&amp;apos;s IP address and port number.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:sock(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.sock/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.sock/</guid>
+      <description>Name cowboy_req:sock - Socket address and port
+Description sock(Req :: cowboy_req:req()) -&amp;gt; Info Info :: {inet:ip_address(), inet:port_number()}  Return the socket&amp;apos;s IP address and port number.
+The socket information can also be obtained using pattern matching:
+#{sock := {IP, Port}} = Req.  Arguments Req The Req object.
+  Return value The socket&amp;apos;s local IP address and port number.
+Changelog 2.1: Function introduced.   Examples Get the socket&amp;apos;s IP address and port number.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:sock(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.sock/</link>
@@ -10839,6 +12078,18 @@ This function may be called as many times as needed after initiating a response
 The second argument indicates if this call is the final call. Use the nofin value until you know no more data will be sent. The final call should use fin (possibly with an empty data value) or be a call to the cowboy_req:stream_trailers(3) function.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_body(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/</guid>
+      <description>Name cowboy_req:stream_body - Stream the response body
+Description stream_body(Data, IsFin, Req :: cowboy_req:req()) -&amp;gt; ok Data :: cowboy_req:resp_body() IsFin :: fin | nofin  Stream the response body.
+This function may be called as many times as needed after initiating a response using the cowboy_req:stream_reply(3) function.
+The second argument indicates if this call is the final call. Use the nofin value until you know no more data will be sent. The final call should use fin (possibly with an empty data value) or be a call to the cowboy_req:stream_trailers(3) function.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_body(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_body/</link>
@@ -10920,6 +12171,17 @@ Description stream_events(Events, IsFin, Req :: cowboy_req:req()) -&amp;gt; ok E
 This function should only be used for text/event-stream responses when using server-sent events. Cowboy will automatically encode the given events to their text representation.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_events(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/</guid>
+      <description>Name cowboy_req:stream_events - Stream events
+Description stream_events(Events, IsFin, Req :: cowboy_req:req()) -&amp;gt; ok Events :: Event | [Event] IsFin :: fin | nofin Event :: #{ comment =&amp;gt; iodata(), data =&amp;gt; iodata(), event =&amp;gt; iodata() | atom(), id =&amp;gt; iodata(), retry =&amp;gt; non_neg_integer() }  Stream events.
+This function should only be used for text/event-stream responses when using server-sent events. Cowboy will automatically encode the given events to their text representation.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_events(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_events/</link>
@@ -11000,6 +12262,18 @@ The header names must be given as lowercase binary strings. While header names a
 Cowboy does not allow duplicate header names. Headers set by this function may overwrite those set by set_resp_header/3.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_reply(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/</guid>
+      <description>Name cowboy_req:stream_reply - Send the response headers
+Description stream_reply(Status, Req :: cowboy_req:req()) -&amp;gt; stream_reply(StatusCode, #{}, Req) stream_reply(Status, Headers, Req :: cowboy_req:req()) -&amp;gt; Req Status :: cowboy:http_status() Headers :: cowboy:http_headers()  Send the response headers.
+The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
+Cowboy does not allow duplicate header names. Headers set by this function may overwrite those set by set_resp_header/3.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_reply(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_reply/</link>
@@ -11084,6 +12358,18 @@ This function can only be called once, after initiating a response using cowboy_
 You must list all field names sent in trailers in the trailer header, otherwise they might be dropped by intermediaries or clients.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:stream_trailers(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/</guid>
+      <description>Name cowboy_req:stream_trailers - Send the response trailers
+Description stream_trailers(Trailers, Req :: cowboy_req:req()) -&amp;gt; ok Trailers :: cowboy:http_headers()  Send the response trailers and terminate the stream.
+This function can only be called once, after initiating a response using cowboy_req:stream_reply(3) and sending zero or more body chunks using cowboy_req:stream_body(3) with the nofin argument set. The function stream_trailers/2 implies fin and automatically terminate the response.
+You must list all field names sent in trailers in the trailer header, otherwise they might be dropped by intermediaries or clients.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:stream_trailers(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_trailers/</link>
@@ -11165,6 +12451,17 @@ Description uri(Req :: cowboy_req:req()) -&amp;gt; uri(Req, #{}) uri(Req :: cowb
 By default Cowboy will build a URI using the components found in the request.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:uri(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.uri/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.uri/</guid>
+      <description>Name cowboy_req:uri - Reconstructed URI
+Description uri(Req :: cowboy_req:req()) -&amp;gt; uri(Req, #{}) uri(Req :: cowboy_req:req(), Opts) -&amp;gt; URI :: iodata() Opts :: #{ scheme =&amp;gt; iodata() | undefined, host =&amp;gt; iodata() | undefined, port =&amp;gt; inet:port_number() | undefined, path =&amp;gt; iodata() | undefined, qs =&amp;gt; iodata() | undefined, fragment =&amp;gt; iodata() | undefined }  Reconstruct the effective request URI, optionally modifying components.
+By default Cowboy will build a URI using the components found in the request.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:uri(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.uri/</link>
@@ -11251,6 +12548,20 @@ The version can also be obtained using pattern matching:
 Changelog 2.0: Only the version is returned, it is no longer wrapped in a tuple.</description>
     </item>
     
+    <item>
+      <title>cowboy_req:version(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.version/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.version/</guid>
+      <description>Name cowboy_req:version - HTTP version
+Description version(Req :: cowboy_req:req()) -&amp;gt; Version :: cowboy:http_version()  Return the HTTP version used for the request.
+The version can also be obtained using pattern matching:
+#{version := Version} = Req.  Arguments Req The Req object.
+  Return value The HTTP version used for the request is returned as an atom. It is provided for informative purposes only.
+Changelog 2.0: Only the version is returned, it is no longer wrapped in a tuple.</description>
+    </item>
+    
     <item>
       <title>cowboy_req:version(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.version/</link>
@@ -11346,6 +12657,19 @@ Callbacks REST handlers implement the following interface:
 init(Req, State) -&amp;gt; {cowboy_rest, Req, State} Callback(Req, State) -&amp;gt; {Result, Req, State} | {stop, Req, State} | {{switch_handler, Module}, Req, State} | {{switch_handler, Module, Opts}, Req, State} terminate(Reason, Req, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() State :: any() Module :: module() Opts :: any() Reason :: normal | {crash, error | exit | throw, any()} Callback - see below Result - see below Default - see below  The init/2 callback is common to all handlers.</description>
     </item>
     
+    <item>
+      <title>cowboy_rest(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_rest/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_rest/</guid>
+      <description>Name cowboy_rest - REST handlers
+Description The module cowboy_rest implements the HTTP state machine.
+Implementing REST handlers is not enough to provide a REST interface; this interface must also follow the REST constraints including HATEOAS (hypermedia as the engine of application state).
+Callbacks REST handlers implement the following interface:
+init(Req, State) -&amp;gt; {cowboy_rest, Req, State} Callback(Req, State) -&amp;gt; {Result, Req, State} | {stop, Req, State} | {{switch_handler, Module}, Req, State} | {{switch_handler, Module, Opts}, Req, State} terminate(Reason, Req, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() State :: any() Module :: module() Opts :: any() Reason :: normal | {crash, error | exit | throw, any()} Callback - see below Result - see below Default - see below  The init/2 callback is common to all handlers.</description>
+    </item>
+    
     <item>
       <title>cowboy_rest(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_rest/</link>
@@ -11431,6 +12755,17 @@ Description The cowboy_router middleware maps the requested host and path to the
 The router takes the dispatch rules as input from the middleware environment. Dispatch rules are generated by calling the cowboy_router:compile(3) function. The environment can contain the rules directly or a tuple {persistent_term, Key}, in which case Cowboy will call persistent_term:get(Key) to retrieve the dispatch rules.</description>
     </item>
     
+    <item>
+      <title>cowboy_router(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router/</guid>
+      <description>Name cowboy_router - Router middleware
+Description The cowboy_router middleware maps the requested host and path to the handler to be used for processing the request.
+The router takes the dispatch rules as input from the middleware environment. Dispatch rules are generated by calling the cowboy_router:compile(3) function. The environment can contain the rules directly or a tuple {persistent_term, Key}, in which case Cowboy will call persistent_term:get(Key) to retrieve the dispatch rules.</description>
+    </item>
+    
     <item>
       <title>cowboy_router(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_router/</link>
@@ -11519,6 +12854,20 @@ Arguments Routes Human readable list of routes.
 Changelog 1.0: Function introduced.   Examples Compile routes and start a listener Dispatch = cowboy_router:compile([ {&#39;_&#39;, [ {&#34;</description>
     </item>
     
+    <item>
+      <title>cowboy_router:compile(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router.compile/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router.compile/</guid>
+      <description>Name cowboy_router:compile - Compile routes to the resources
+Description compile(cowboy_router:routes()) -&amp;gt; cowboy_router:dispatch_rules()  Compile routes to the resources.
+Takes a human readable list of routes and transforms it into a form more efficient to process.
+Arguments Routes Human readable list of routes.
+  Return value An opaque dispatch rules value is returned. This value must be given to Cowboy as a middleware environment value.
+Changelog 1.0: Function introduced.   Examples Compile routes and start a listener Dispatch = cowboy_router:compile([ {&#39;_&#39;, [ {&#34;</description>
+    </item>
+    
     <item>
       <title>cowboy_router:compile(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_router.compile/</link>
@@ -11611,6 +12960,18 @@ The static file handler is a pre-written handler coming with Cowboy. To serve fi
 Options opts() :: {priv_file, App, Path} | {priv_file, App, Path, Extra} | {file, Path} | {file, Path, Extra} | {priv_dir, App, Path} | {priv_dir, App, Path, Extra} | {dir, Path} | {dir, Path, Extra} App :: atom() Path :: binary() | string() Extra :: [Charset | Etag | Mimetypes] Charset :: {charset, module(), function()} | {charset, binary()} Etag :: {etag, module(), function()} | {etag, false} Mimetypes :: {mimetypes, module(), function()} | {mimetypes, binary() | ParsedMime} ParsedMime :: {Type :: binary(), SubType :: binary(), Params} Params :: [{Key :: binary(), Value :: binary()}]  Static handler configuration.</description>
     </item>
     
+    <item>
+      <title>cowboy_static(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_static/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_static/</guid>
+      <description>Name cowboy_static - Static file handler
+Description The module cowboy_static implements file serving capabilities using the REST semantics provided by cowboy_rest.
+The static file handler is a pre-written handler coming with Cowboy. To serve files, use it in your routes.
+Options opts() :: {priv_file, App, Path} | {priv_file, App, Path, Extra} | {file, Path} | {file, Path, Extra} | {priv_dir, App, Path} | {priv_dir, App, Path, Extra} | {dir, Path} | {dir, Path, Extra} App :: atom() Path :: binary() | string() Extra :: [Charset | Etag | Mimetypes] Charset :: {charset, module(), function()} | {charset, binary()} Etag :: {etag, module(), function()} | {etag, false} Mimetypes :: {mimetypes, module(), function()} | {mimetypes, binary() | ParsedMime} ParsedMime :: {Type :: binary(), SubType :: binary(), Params} Params :: [{Key :: binary(), Value :: binary()}]  Static handler configuration.</description>
+    </item>
+    
     <item>
       <title>cowboy_static(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_static/</link>
@@ -11698,6 +13059,19 @@ Cowboy calls the stream handler for nearly all events related to a stream. Excep
 Extra care must be taken when implementing stream handlers to ensure compatibility.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream/</guid>
+      <description>Name cowboy_stream - Stream handlers
+Description The module cowboy_stream defines a callback interface and a protocol for handling HTTP streams.
+An HTTP request and its associated response is called a stream. A connection may have many streams. In HTTP/1.1 they are executed sequentially, while in HTTP/2 they are executed concurrently.
+Cowboy calls the stream handler for nearly all events related to a stream. Exceptions vary depending on the protocol.
+Extra care must be taken when implementing stream handlers to ensure compatibility.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_stream/</link>
@@ -11774,6 +13148,18 @@ This function should be called by all stream handlers. It will propagate data to
 Arguments StreamID The stream ID.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:data(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.data/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.data/</guid>
+      <description>Name cowboy_stream:data - Handle data for a stream
+Description data(StreamID, IsFin, Data, State) -&amp;gt; {Commands, State} StreamID :: cowboy_stream:stream_id() IsFin :: cowboy_stream:fin() Data :: binary() Commands :: cowboy_stream:commands() State - opaque  Handle data for a stream.
+This function should be called by all stream handlers. It will propagate data to the next configured stream handler. Handlers do not have to propagate data that has been fully handled.
+Arguments StreamID The stream ID.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:early_error(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.early_error/</link>
@@ -11800,6 +13186,19 @@ Arguments StreamID The stream ID.
  Reason Reason for termination.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:early_error(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/</guid>
+      <description>Name cowboy_stream:early_error - Handle an early error for a stream
+Description early_error(StreamID, Reason, PartialReq, Resp, Opts) -&amp;gt; Resp StreamID :: cowboy_stream:stream_id() Reason :: cowboy_stream:reason() PartialReq :: cowboy_stream:partial_req() Resp :: cowboy_stream:resp_command() Opts :: cowboy:opts()  Handle an early error for a stream.
+This function should be called by all stream handlers. It will propagate the early error to the next configured stream handler.
+Arguments StreamID The stream ID.
+ Reason Reason for termination.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:info(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.info/</link>
@@ -11824,6 +13223,18 @@ This function should be called by all stream handlers. It will propagate the eve
 Arguments StreamID The stream ID.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:info(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.info/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.info/</guid>
+      <description>Name cowboy_stream:info - Handle a message for a stream
+Description info(StreamID, Info, State) -&amp;gt; {Commands, State} StreamID :: cowboy_stream:stream_id() Info :: any() Commands :: cowboy_stream:commands() State - opaque  Handle a message for a stream.
+This function should be called by all stream handlers. It will propagate the event to the next configured stream handler. Handlers do not have to propagate events that have been fully handled.
+Arguments StreamID The stream ID.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:init(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.init/</link>
@@ -11854,6 +13265,21 @@ Arguments StreamID The stream ID.
  Commands The commands to be executed.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:init(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.init/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.init/</guid>
+      <description>Name cowboy_stream:init - Initialize a stream
+Description init(StreamID, Req, Opts) -&amp;gt; {Commands, State} StreamID :: cowboy_stream:stream_id() Req :: cowboy_req:req() Opts :: cowboy:opts() Commands :: cowboy_stream:commands() State - opaque  Initialize a stream.
+This function must be called by all stream handlers. It will initialize the next configured stream handler.
+Arguments StreamID The stream ID.
+ Req The Req object.
+ Opts The protocol options.
+ Commands The commands to be executed.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream:terminate(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.terminate/</link>
@@ -11884,6 +13310,21 @@ Arguments StreamID The stream ID.
   Return value The atom ok is always returned.</description>
     </item>
     
+    <item>
+      <title>cowboy_stream:terminate(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/</guid>
+      <description>Name cowboy_stream:terminate - Terminate a stream
+Description terminate(StreamID, Reason, State) -&amp;gt; ok StreamID :: cowboy_stream:stream_id() Reason :: cowboy_stream:reason() State - opaque  Terminate a stream.
+This function must be called by all stream handlers. It will terminate the next configured stream handler.
+Arguments StreamID The stream ID.
+ Reason Reason for termination.
+ State The state for the next stream handler.
+  Return value The atom ok is always returned.</description>
+    </item>
+    
     <item>
       <title>cowboy_stream_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy_stream_h/</link>
@@ -11920,6 +13361,18 @@ Options opts() :: #{ env =&amp;gt; cowboy_middleware:env(), middlewares =&amp;gt
 The default value is given next to the option name:</description>
     </item>
     
+    <item>
+      <title>cowboy_stream_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream_h/</guid>
+      <description>Name cowboy_stream_h - Default stream handler
+Description The module cowboy_stream_h is Cowboy&amp;apos;s default stream handler and defines much of its behavior. It is responsible for managing the request process, sending it the request body and translating its messages into commands that Cowboy understands.
+Options opts() :: #{ env =&amp;gt; cowboy_middleware:env(), middlewares =&amp;gt; [module()], shutdown_timeout =&amp;gt; timeout() }  Configuration for the default stream handler.
+The default value is given next to the option name:</description>
+    </item>
+    
     <item>
       <title>cowboy_stream_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_stream_h/</link>
@@ -12001,6 +13454,17 @@ Description The module cowboy_tracer_h can be used to conditionally trace stream
 Options opts() :: #{ tracer_callback =&amp;gt; Callback, tracer_flags =&amp;gt; [atom()], tracer_match_specs =&amp;gt; [MatchSpec] } Callback :: fun((init | terminate | tuple(), State) -&amp;gt; State) MatchSpec :: MatchPredicate | {method, binary()} | {host, binary()} | {path, binary()} | {path_start, binary()} | {header, binary()} | {header, binary(), binary()} | {peer_ip, inet:ip_address()} MatchPredicate :: fun((cowboy_stream:streamid(), cowboy_req:req(), cowboy:opts()) -&amp;gt; boolean()) }  Configuration for the tracer stream handler.</description>
     </item>
     
+    <item>
+      <title>cowboy_tracer_h(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_tracer_h/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_tracer_h/</guid>
+      <description>Name cowboy_tracer_h - Tracer stream handler
+Description The module cowboy_tracer_h can be used to conditionally trace streams based on information found in the request. Trace messages are given to the configured callback.
+Options opts() :: #{ tracer_callback =&amp;gt; Callback, tracer_flags =&amp;gt; [atom()], tracer_match_specs =&amp;gt; [MatchSpec] } Callback :: fun((init | terminate | tuple(), State) -&amp;gt; State) MatchSpec :: MatchPredicate | {method, binary()} | {host, binary()} | {path, binary()} | {path_start, binary()} | {header, binary()} | {header, binary(), binary()} | {peer_ip, inet:ip_address()} MatchPredicate :: fun((cowboy_stream:streamid(), cowboy_req:req(), cowboy:opts()) -&amp;gt; boolean()) }  Configuration for the tracer stream handler.</description>
+    </item>
+    
     <item>
       <title>cowboy_tracer_h(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_tracer_h/</link>
@@ -12070,6 +13534,18 @@ Callbacks Websocket handlers must implement the following callback interface:
 init(Req, State) -&amp;gt; {cowboy_websocket, Req, State} | {cowboy_websocket, Req, State, Opts} websocket_init(State) -&amp;gt; CallResult %% optional websocket_handle(InFrame, State) -&amp;gt; CallResult websocket_info(Info, State) -&amp;gt; CallResult terminate(Reason, PartialReq, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() PartialReq :: map() State :: any() Opts :: cowboy_websocket:opts() InFrame :: ping | pong | {text | binary | ping | pong, binary()} Info :: any() CallResult :: {commands(), State} | {commands(), State, hibernate} | Deprecated Deprecated :: {ok, State} | {ok, State, hibernate} | {reply, OutFrame | [OutFrame], State} | {reply, OutFrame | [OutFrame], State, hibernate} | {stop, State} OutFrame :: cow_ws:frame() %% see types below Reason :: normal | stop | timeout | remote | {remote, cow_ws:close_code(), binary()} | {error, badencoding | badframe | closed | atom()} | {crash, error | exit | throw, any()}  The init/2 callback is common to all handlers.</description>
     </item>
     
+    <item>
+      <title>cowboy_websocket(3)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_websocket/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_websocket/</guid>
+      <description>Name cowboy_websocket - Websocket
+Description The module cowboy_websocket implements Websocket as a Ranch protocol. It also defines a callback interface for handling Websocket connections.
+Callbacks Websocket handlers must implement the following callback interface:
+init(Req, State) -&amp;gt; {cowboy_websocket, Req, State} | {cowboy_websocket, Req, State, Opts} websocket_init(State) -&amp;gt; CallResult %% optional websocket_handle(InFrame, State) -&amp;gt; CallResult websocket_info(Info, State) -&amp;gt; CallResult terminate(Reason, PartialReq, State) -&amp;gt; ok %% optional Req :: cowboy_req:req() PartialReq :: map() State :: any() Opts :: cowboy_websocket:opts() InFrame :: ping | pong | {text | binary | ping | pong, binary()} Info :: any() CallResult :: {commands(), State} | {commands(), State, hibernate} | Deprecated Deprecated :: {ok, State} | {ok, State, hibernate} | {reply, OutFrame | [OutFrame], State} | {reply, OutFrame | [OutFrame], State, hibernate} | {stop, State} OutFrame :: cow_ws:frame() %% see types below Reason :: normal | stop | timeout | remote | {remote, cow_ws:close_code(), binary()} | {error, badencoding | badframe | closed | atom()} | {crash, error | exit | throw, any()}  The init/2 callback is common to all handlers.</description>
+    </item>
+    
     <item>
       <title>cowboy_websocket(3)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_websocket/</link>
@@ -15124,6 +16600,17 @@ Description This chapter aims to list all HTTP status codes that Cowboy may retu
 100 Continue When the client sends an expect: 100-continue header, Cowboy automatically sends a this status code before trying to read the request body. This behavior can be disabled using the appropriate body option.</description>
     </item>
     
+    <item>
+      <title>HTTP status codes(7)</title>
+      <link>https://ninenines.eu/docs/en/cowboy/2.13/manual/http_status_codes/</link>
+      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
+      
+      <guid>https://ninenines.eu/docs/en/cowboy/2.13/manual/http_status_codes/</guid>
+      <description>Name HTTP status codes - status codes used by Cowboy
+Description This chapter aims to list all HTTP status codes that Cowboy may return, with details on the reasons why. The list given here only includes the replies that Cowboy sends, not user replies.
+100 Continue When the client sends an expect: 100-continue header, Cowboy automatically sends a this status code before trying to read the request body. This behavior can be disabled using the appropriate body option.</description>
+    </item>
+    
     <item>
       <title>HTTP status codes(7)</title>
       <link>https://ninenines.eu/docs/en/cowboy/2.6/manual/http_status_codes/</link>
diff --git a/services/index.html b/services/index.html
index b2b52b53..643ca93d 100644
--- a/services/index.html
+++ b/services/index.html
@@ -960,6 +960,88 @@
 
 	
 
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+
 	
 
 	
@@ -3053,6 +3135,172 @@
 	
 
 	
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+	
 
 	
 
diff --git a/sitemap.xml b/sitemap.xml
index 73aecdfa..3a6120d0 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -62,6 +62,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/modern_web/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/modern_web/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/modern_web/</loc>
   </url>
@@ -90,6 +94,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/erlang_web/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/erlang_web/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/erlang_web/</loc>
   </url>
@@ -190,6 +198,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/introduction/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/introduction/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/introduction/</loc>
   </url>
@@ -290,6 +302,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/getting_started/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/getting_started/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/getting_started/</loc>
   </url>
@@ -366,6 +382,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/flow_diagram/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/flow_diagram/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/flow_diagram/</loc>
   </url>
@@ -462,6 +482,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/listeners/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/listeners/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/listeners/</loc>
   </url>
@@ -514,6 +538,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/routing/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/routing/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/routing/</loc>
   </url>
@@ -582,6 +610,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/constraints/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/constraints/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/constraints/</loc>
   </url>
@@ -638,6 +670,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/handlers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/handlers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/handlers/</loc>
   </url>
@@ -698,6 +734,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/loop_handlers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/loop_handlers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/loop_handlers/</loc>
   </url>
@@ -738,6 +778,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/static_files/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/static_files/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/static_files/</loc>
   </url>
@@ -798,6 +842,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/req/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/req/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/req/</loc>
   </url>
@@ -850,6 +898,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/req_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/req_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/req_body/</loc>
   </url>
@@ -886,6 +938,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/resp/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/resp/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/resp/</loc>
   </url>
@@ -934,6 +990,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/cookies/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/cookies/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/cookies/</loc>
   </url>
@@ -962,6 +1022,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/multipart/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/multipart/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/multipart/</loc>
   </url>
@@ -1002,6 +1066,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/rest_principles/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_principles/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_principles/</loc>
   </url>
@@ -1034,6 +1102,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/rest_handlers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_handlers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_handlers/</loc>
   </url>
@@ -1062,6 +1134,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/rest_flowcharts/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/rest_flowcharts/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/rest_flowcharts/</loc>
   </url>
@@ -1090,6 +1166,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/resource_design/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/resource_design/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/resource_design/</loc>
   </url>
@@ -1118,6 +1198,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/ws_protocol/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_protocol/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/ws_protocol/</loc>
   </url>
@@ -1146,6 +1230,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/ws_handlers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/ws_handlers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/ws_handlers/</loc>
   </url>
@@ -1174,6 +1262,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/streams/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/streams/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/streams/</loc>
   </url>
@@ -1202,6 +1294,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/middlewares/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/middlewares/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/middlewares/</loc>
   </url>
@@ -1238,6 +1334,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/performance/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/performance/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.8/guide/performance/</loc>
   </url>
@@ -1254,6 +1354,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.11/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.8/guide/migrating_from_2.7/</loc>
   </url>
@@ -1290,6 +1394,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.10/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.11/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.11/guide/migrating_from_2.9/</loc>
   </url>
@@ -1318,6 +1426,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.11/guide/migrating_from_2.8/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.10/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.9/</loc>
   </url>
@@ -1350,6 +1462,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.8/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.9/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.2/</loc>
   </url>
@@ -1378,6 +1494,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.7/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.8/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.1/</loc>
   </url>
@@ -1406,6 +1526,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.6/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.7/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_2.0/</loc>
   </url>
@@ -1434,6 +1558,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.5/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.6/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/migrating_from_1.0/</loc>
   </url>
@@ -1462,6 +1590,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.4/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.5/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/specs/</loc>
   </url>
@@ -1490,6 +1622,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.3/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.4/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.8/guide/specs/</loc>
   </url>
@@ -1510,6 +1646,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.2/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.3/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.9/guide/specs/</loc>
   </url>
@@ -1526,6 +1666,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.1/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.2/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.10/guide/specs/</loc>
   </url>
@@ -1538,6 +1682,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_2.0/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.1/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.11/guide/specs/</loc>
   </url>
@@ -1546,13 +1694,30 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/migrating_from_1.0/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.0/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/specs/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_1.0/</loc>
+  </url>
+  
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/specs/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/articles/</loc>
-    <lastmod>2025-02-17T07:00:00+01:00</lastmod>
+    <lastmod>2025-02-18T07:00:00+01:00</lastmod>
+  </url>
+  
+  <url>
+    <loc>https://ninenines.eu/articles/cowboy-2.13.0/</loc>
+    <lastmod>2025-02-18T07:00:00+01:00</lastmod>
   </url>
   
   <url>
@@ -2043,6 +2208,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/</loc>
   </url>
@@ -2071,6 +2240,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/guide/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/guide/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/guide/</loc>
   </url>
@@ -2099,6 +2272,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy/</loc>
   </url>
@@ -2127,6 +2304,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_app/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_app/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_app/</loc>
   </url>
@@ -2151,6 +2332,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy.get_env/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.get_env/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy.set_env/</loc>
   </url>
@@ -2163,6 +2348,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy.set_env/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.set_env/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.set_env/</loc>
   </url>
@@ -2191,6 +2380,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy.start_clear/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_clear/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.start_clear/</loc>
   </url>
@@ -2219,6 +2412,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy.start_tls/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.start_tls/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.start_tls/</loc>
   </url>
@@ -2247,6 +2444,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy.stop_listener/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy.stop_listener/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy.stop_listener/</loc>
   </url>
@@ -2275,6 +2476,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_compress_h/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_compress_h/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_compress_h/</loc>
   </url>
@@ -2303,6 +2508,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_constraints/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints/</loc>
   </url>
@@ -2331,6 +2540,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_constraints.int/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.int/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints.int/</loc>
   </url>
@@ -2359,6 +2572,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_constraints.nonempty/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_constraints.nonempty/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_constraints.nonempty/</loc>
   </url>
@@ -2383,6 +2600,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_decompress_h/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_decompress_h/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy_handler/</loc>
   </url>
@@ -2395,6 +2616,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_handler/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler/</loc>
   </url>
@@ -2423,6 +2648,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_handler.terminate/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_handler.terminate/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_handler.terminate/</loc>
   </url>
@@ -2451,6 +2680,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_http/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_http/</loc>
   </url>
@@ -2479,6 +2712,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_http2/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_http2/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_http2/</loc>
   </url>
@@ -2507,6 +2744,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_loop/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_loop/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_loop/</loc>
   </url>
@@ -2535,6 +2776,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_metrics_h/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_metrics_h/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_metrics_h/</loc>
   </url>
@@ -2559,6 +2804,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_middleware/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_middleware/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_middleware/</loc>
   </url>
@@ -2587,6 +2836,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req/</loc>
   </url>
@@ -2615,6 +2868,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.binding/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.binding/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.binding/</loc>
   </url>
@@ -2643,6 +2900,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.bindings/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.bindings/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.bindings/</loc>
   </url>
@@ -2671,6 +2932,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.body_length/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.body_length/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.body_length/</loc>
   </url>
@@ -2699,6 +2964,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.cast/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cast/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_req.cast/</loc>
   </url>
@@ -2723,6 +2992,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.cert/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.cert/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.cert/</loc>
   </url>
@@ -2751,6 +3024,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.delete_resp_header/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.delete_resp_header/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.delete_resp_header/</loc>
   </url>
@@ -2779,6 +3056,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.filter_cookies/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.filter_cookies/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_req.filter_cookies/</loc>
   </url>
@@ -2803,6 +3084,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.has_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_body/</loc>
   </url>
@@ -2831,6 +3116,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_body/</loc>
   </url>
@@ -2859,6 +3148,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.has_resp_header/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.has_resp_header/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.has_resp_header/</loc>
   </url>
@@ -2887,6 +3180,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.header/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.header/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.header/</loc>
   </url>
@@ -2915,6 +3212,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.headers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.headers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.headers/</loc>
   </url>
@@ -2943,6 +3244,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.host/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.host/</loc>
   </url>
@@ -2971,6 +3276,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.host_info/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.host_info/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.host_info/</loc>
   </url>
@@ -2999,6 +3308,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.inform/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.inform/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.inform/</loc>
   </url>
@@ -3027,6 +3340,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.match_cookies/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_cookies/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.match_cookies/</loc>
   </url>
@@ -3055,6 +3372,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.match_qs/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.match_qs/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.match_qs/</loc>
   </url>
@@ -3083,6 +3404,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.method/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.method/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.method/</loc>
   </url>
@@ -3111,6 +3436,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.parse_cookies/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_cookies/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_cookies/</loc>
   </url>
@@ -3139,6 +3468,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.parse_header/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_header/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_header/</loc>
   </url>
@@ -3167,6 +3500,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.parse_qs/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.parse_qs/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.parse_qs/</loc>
   </url>
@@ -3195,6 +3532,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.path/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.path/</loc>
   </url>
@@ -3223,6 +3564,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.path_info/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.path_info/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.path_info/</loc>
   </url>
@@ -3251,6 +3596,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.peer/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.peer/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.peer/</loc>
   </url>
@@ -3279,6 +3628,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.port/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.port/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.port/</loc>
   </url>
@@ -3307,6 +3660,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.push/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.push/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.push/</loc>
   </url>
@@ -3335,6 +3692,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.qs/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.qs/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.qs/</loc>
   </url>
@@ -3363,6 +3724,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.read_and_match_urlencoded_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_and_match_urlencoded_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_and_match_urlencoded_body/</loc>
   </url>
@@ -3391,6 +3756,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.read_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_body/</loc>
   </url>
@@ -3419,6 +3788,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.read_part/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_part/</loc>
   </url>
@@ -3447,6 +3820,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.read_part_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_part_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_part_body/</loc>
   </url>
@@ -3475,6 +3852,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.read_urlencoded_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.read_urlencoded_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.read_urlencoded_body/</loc>
   </url>
@@ -3503,6 +3884,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.reply/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.reply/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.reply/</loc>
   </url>
@@ -3531,6 +3916,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.resp_header/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_header/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.resp_header/</loc>
   </url>
@@ -3559,6 +3948,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.resp_headers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.resp_headers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.resp_headers/</loc>
   </url>
@@ -3587,6 +3980,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.scheme/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.scheme/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.scheme/</loc>
   </url>
@@ -3615,6 +4012,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_body/</loc>
   </url>
@@ -3643,6 +4044,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_cookie/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_cookie/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_cookie/</loc>
   </url>
@@ -3671,6 +4076,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_header/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_header/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_header/</loc>
   </url>
@@ -3699,6 +4108,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.set_resp_headers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.set_resp_headers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.set_resp_headers/</loc>
   </url>
@@ -3727,6 +4140,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.sock/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.sock/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.sock/</loc>
   </url>
@@ -3755,6 +4172,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.stream_body/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_body/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_body/</loc>
   </url>
@@ -3783,6 +4204,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.stream_events/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_events/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_events/</loc>
   </url>
@@ -3811,6 +4236,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.stream_reply/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_reply/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_reply/</loc>
   </url>
@@ -3839,6 +4268,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.stream_trailers/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.stream_trailers/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.stream_trailers/</loc>
   </url>
@@ -3867,6 +4300,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.uri/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.uri/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.uri/</loc>
   </url>
@@ -3895,6 +4332,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_req.version/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_req.version/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_req.version/</loc>
   </url>
@@ -3923,6 +4364,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_rest/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_rest/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_rest/</loc>
   </url>
@@ -3951,6 +4396,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_router/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_router/</loc>
   </url>
@@ -3979,6 +4428,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_router.compile/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_router.compile/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_router.compile/</loc>
   </url>
@@ -4007,6 +4460,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_static/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_static/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_static/</loc>
   </url>
@@ -4035,6 +4492,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_stream/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_stream/</loc>
   </url>
@@ -4059,6 +4520,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_stream.data/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.data/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.early_error/</loc>
   </url>
@@ -4067,6 +4532,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_stream.early_error/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.early_error/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.info/</loc>
   </url>
@@ -4075,6 +4544,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_stream.info/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.info/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.init/</loc>
   </url>
@@ -4083,6 +4556,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_stream.init/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.init/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.11/manual/cowboy_stream.terminate/</loc>
   </url>
@@ -4091,6 +4568,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_stream.terminate/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream.terminate/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.10/manual/cowboy_stream_h/</loc>
   </url>
@@ -4103,6 +4584,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_stream_h/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_stream_h/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_stream_h/</loc>
   </url>
@@ -4131,6 +4616,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_tracer_h/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_tracer_h/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.7/manual/cowboy_tracer_h/</loc>
   </url>
@@ -4155,6 +4644,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/cowboy_websocket/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/cowboy_websocket/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/cowboy_websocket/</loc>
   </url>
@@ -5171,6 +5664,10 @@
     <loc>https://ninenines.eu/docs/en/cowboy/2.12/manual/http_status_codes/</loc>
   </url>
   
+  <url>
+    <loc>https://ninenines.eu/docs/en/cowboy/2.13/manual/http_status_codes/</loc>
+  </url>
+  
   <url>
     <loc>https://ninenines.eu/docs/en/cowboy/2.6/manual/http_status_codes/</loc>
   </url>
-- 
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