diff options
Diffstat (limited to 'doc/src/guide')
23 files changed, 1709 insertions, 369 deletions
diff --git a/doc/src/guide/book.asciidoc b/doc/src/guide/book.asciidoc index 0b01b22..cf8c943 100644 --- a/doc/src/guide/book.asciidoc +++ b/doc/src/guide/book.asciidoc @@ -75,6 +75,14 @@ include::performance.asciidoc[Performance] = Additional information +include::migrating_from_2.11.asciidoc[Migrating from Cowboy 2.11 to 2.12] + +include::migrating_from_2.10.asciidoc[Migrating from Cowboy 2.10 to 2.11] + +include::migrating_from_2.9.asciidoc[Migrating from Cowboy 2.9 to 2.10] + +include::migrating_from_2.8.asciidoc[Migrating from Cowboy 2.8 to 2.9] + include::migrating_from_2.7.asciidoc[Migrating from Cowboy 2.7 to 2.8] include::migrating_from_2.6.asciidoc[Migrating from Cowboy 2.6 to 2.7] diff --git a/doc/src/guide/getting_started.asciidoc b/doc/src/guide/getting_started.asciidoc index 7bf97e3..a26802d 100644 --- a/doc/src/guide/getting_started.asciidoc +++ b/doc/src/guide/getting_started.asciidoc @@ -62,14 +62,16 @@ handler. === Cowboy setup We will modify the 'Makefile' to tell the build system it needs to -fetch and compile Cowboy: +fetch and compile Cowboy, and that we will use releases: [source,makefile] ---- PROJECT = hello_erlang DEPS = cowboy -dep_cowboy_commit = 2.8.0 +dep_cowboy_commit = 2.11.0 + +REL_DEPS = relx DEP_PLUGINS = cowboy @@ -80,6 +82,9 @@ 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 diff --git a/doc/src/guide/introduction.asciidoc b/doc/src/guide/introduction.asciidoc index f81c872..519608d 100644 --- a/doc/src/guide/introduction.asciidoc +++ b/doc/src/guide/introduction.asciidoc @@ -42,7 +42,7 @@ Cowboy is developed for Erlang/OTP 22.0 and newer. Cowboy uses the ISC License. ---- -Copyright (c) 2011-2019, Loïc Hoguin <[email protected]> +Copyright (c) 2011-2024, Loïc Hoguin <[email protected]> Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above diff --git a/doc/src/guide/listeners.asciidoc b/doc/src/guide/listeners.asciidoc index 04169f9..40aff83 100644 --- a/doc/src/guide/listeners.asciidoc +++ b/doc/src/guide/listeners.asciidoc @@ -7,7 +7,7 @@ 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/1.3/guide/listeners/[Ranch User Guide] +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 diff --git a/doc/src/guide/loop_handlers.asciidoc b/doc/src/guide/loop_handlers.asciidoc index e574854..fc45d1c 100644 --- a/doc/src/guide/loop_handlers.asciidoc +++ b/doc/src/guide/loop_handlers.asciidoc @@ -31,7 +31,10 @@ for plain HTTP handlers. 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. +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: @@ -49,6 +52,14 @@ 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 @@ -123,3 +134,17 @@ 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/doc/src/guide/migrating_from_2.10.asciidoc b/doc/src/guide/migrating_from_2.10.asciidoc new file mode 100644 index 0000000..aaa8fe9 --- /dev/null +++ b/doc/src/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/doc/src/guide/migrating_from_2.11.asciidoc b/doc/src/guide/migrating_from_2.11.asciidoc new file mode 100644 index 0000000..ab74642 --- /dev/null +++ b/doc/src/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/doc/src/guide/migrating_from_2.5.asciidoc b/doc/src/guide/migrating_from_2.5.asciidoc index b91b617..5196cc7 100644 --- a/doc/src/guide/migrating_from_2.5.asciidoc +++ b/doc/src/guide/migrating_from_2.5.asciidoc @@ -64,7 +64,7 @@ experimental. * 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 ouput automatically for the ranged response. + then split the output automatically for the ranged response. * Enable range requests support in `cowboy_static`. diff --git a/doc/src/guide/migrating_from_2.8.asciidoc b/doc/src/guide/migrating_from_2.8.asciidoc new file mode 100644 index 0000000..a3a0e7c --- /dev/null +++ b/doc/src/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/doc/src/guide/migrating_from_2.9.asciidoc b/doc/src/guide/migrating_from_2.9.asciidoc new file mode 100644 index 0000000..7395e5f --- /dev/null +++ b/doc/src/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/doc/src/guide/req_body.asciidoc b/doc/src/guide/req_body.asciidoc index 4906811..88389f6 100644 --- a/doc/src/guide/req_body.asciidoc +++ b/doc/src/guide/req_body.asciidoc @@ -74,17 +74,33 @@ only up to 1MB for up to 5 seconds: #{length => 1000000, period => 5000}). ---- -You may also disable the length limit: +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] -{ok, Data, Req} = cowboy_req:read_body(Req0, #{length => infinity}). +---- +Ref = make_ref(), +cowboy_req:cast({read_body, self(), Ref, auto, infinity}, Req). +---- -This makes the function wait 15 seconds and return with -whatever arrived during that period. This is not -recommended for public facing applications. +Cowboy will wait indefinitely for data and then send a +`request_body` message as soon as it has data available, +regardless of length. -These two options can effectively be used to control -the rate of transmission of the request body. +[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 diff --git a/doc/src/guide/resource_design.asciidoc b/doc/src/guide/resource_design.asciidoc index 954d87d..125b437 100644 --- a/doc/src/guide/resource_design.asciidoc +++ b/doc/src/guide/resource_design.asciidoc @@ -144,6 +144,16 @@ 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. @@ -191,10 +201,15 @@ the `options` method. === GET and HEAD methods If you implement the methods GET and/or HEAD, you must -implement one `ProvideResource` callback for each +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, diff --git a/doc/src/guide/rest_conneg.png b/doc/src/guide/rest_conneg.png Binary files differindex 65ecdcf..79aa69b 100644 --- a/doc/src/guide/rest_conneg.png +++ b/doc/src/guide/rest_conneg.png diff --git a/doc/src/guide/rest_conneg.svg b/doc/src/guide/rest_conneg.svg index 247567a..97bba6a 100644 --- a/doc/src/guide/rest_conneg.svg +++ b/doc/src/guide/rest_conneg.svg @@ -2,24 +2,23 @@ <!-- Created with Inkscape (http://www.inkscape.org/) --> <svg - xmlns:osb="http://www.openswatchbook.org/uri/2009/osb" - xmlns:dc="http://purl.org/dc/elements/1.1/" - xmlns:cc="http://creativecommons.org/ns#" - xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" - xmlns:svg="http://www.w3.org/2000/svg" - xmlns="http://www.w3.org/2000/svg" - xmlns:xlink="http://www.w3.org/1999/xlink" - xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" - xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" width="744.09448819" height="1052.3622047" id="svg2" version="1.1" - 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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 @@ -121,11 +126,18 @@ succeed, the resource can be retrieved. Cowboy prepares the response by first retrieving metadata about the representation, then by calling -the `ProvideResource` callback. This is the callback +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, or a fun if the -body must be streamed. +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. 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x="505.57257" + x="763.57257" y="627.32867" id="text5371-43-2-9" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1330,17 +2232,17 @@ inkscape:export-ydpi="89.926643"><tspan sodipodi:role="line" id="tspan5373-3-9-7" - x="505.57257" + x="763.57257" y="627.32867" style="font-size:16px;line-height:1.25;font-family:sans-serif">301 moved permanently</tspan></text> <g - transform="translate(563.72619,353.12604)" + transform="translate(821.72619,353.12604)" id="g5650-2-2-65"> <path inkscape:connector-curvature="0" id="path5570-2-1-5" - d="m -57.78256,343.20394 0,61.59661" - style="opacity:0.8;fill:none;stroke:#9b3b1c;stroke-width:2;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" /> + d="m -57.78256,343.20394 v 61.59661" + style="opacity:0.8;fill:none;stroke:#9b3b1c;stroke-width:2;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" /> <path 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style="fill:none;stroke:#6d8e41;stroke-width:2;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" + style="fill:none;stroke:#6d8e41;stroke-width:2;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" d="m 146.3711,152.21525 c 0,0 -65.760927,60.81119 -8.48528,132.93608" id="path20172-9-8-9-31-8-1" inkscape:connector-curvature="0" - transform="matrix(0,1,-1,0,248.85545,276.69312)" /> + transform="rotate(90,-13.918835,262.77429)" /> <path transform="matrix(0.38224114,0.44664484,-0.44664484,0.38224114,233.48523,355.54168)" inkscape:transform-center-y="-1.0388082" @@ -1386,16 +2288,16 @@ sodipodi:cx="-222.73865" sodipodi:sides="3" id="path5576-12-1-7-58-6-3-6-3" - style="opacity:0.8;fill:#6d8e41;fill-opacity:1;fill-rule:nonzero;stroke:#6d8e41;stroke-width:0;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + 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style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#6d8e41;fill-opacity:1;stroke:none" - x="505.45535" + x="763.45532" y="709.62695" id="text5371-2-74-0-7" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1412,13 +2314,13 @@ inkscape:export-ydpi="89.926643"><tspan sodipodi:role="line" id="tspan5373-6-18-2-8" - x="505.45535" + x="763.45532" y="709.62695" style="font-size:16px;line-height:1.25;font-family:sans-serif">moved_temporarily</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#9b3b1c;fill-opacity:1;stroke:none" - x="549.12921" + x="807.12921" y="752.64056" id="text5371-4-4-9-3-2" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1426,13 +2328,13 @@ inkscape:export-ydpi="89.926643"><tspan sodipodi:role="line" id="tspan5373-9-2-6-2-6" - x="549.12921" + x="807.12921" y="752.64056" style="font-size:16px;line-height:1.25;font-family:sans-serif">true*</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:start;letter-spacing:0px;word-spacing:0px;text-anchor:start;fill:#6d8e41;fill-opacity:1;stroke:none" - x="651.74426" + x="875.74426" y="794.16199" id="text5371-2-391-5-5-1-0" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1440,15 +2342,15 @@ inkscape:export-ydpi="89.926643"><tspan sodipodi:role="line" id="tspan5373-6-63-7-9-9-2" - x="651.74426" + x="875.74426" y="794.16199" style="font-size:16px;line-height:1.25;font-family:sans-serif">false</tspan></text> <rect - style="fill:#effab4;fill-opacity:1;fill-rule:nonzero;stroke:#c7d28c;stroke-width:2.73499846;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + style="fill:#effab4;fill-opacity:1;fill-rule:nonzero;stroke:#c7d28c;stroke-width:2.735;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" id="rect5273-7-3-1-5-9-2" width="218.52127" height="34.993004" - x="396.68301" + x="654.68298" y="770.70062" rx="12.372616" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1457,7 +2359,7 @@ <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#77823c;fill-opacity:1;stroke:none" - x="505.57257" + x="763.57257" y="792.61121" id="text5371-43-2-9-7" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1465,15 +2367,15 @@ inkscape:export-ydpi="89.926643"><tspan sodipodi:role="line" id="tspan5373-3-9-7-8" - x="505.57257" + x="763.57257" y="792.61121" style="font-size:16px;line-height:1.25;font-family:sans-serif">307 moved temporarily</tspan></text> <rect - style="fill:#effab4;fill-opacity:1;fill-rule:nonzero;stroke:#c7d28c;stroke-width:2.73499846;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + style="fill:#effab4;fill-opacity:1;fill-rule:nonzero;stroke:#c7d28c;stroke-width:2.735;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" id="rect5273-7-3-1-5-9-2-4" width="218.52127" height="34.993004" - x="396.68301" + x="654.68298" y="853.22168" rx="12.372616" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1482,7 +2384,7 @@ <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#77823c;fill-opacity:1;stroke:none" - x="505.97882" + x="763.97882" y="874.99164" id="text5371-43-2-9-7-3" inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" @@ -1490,7 +2392,7 @@ inkscape:export-ydpi="89.926643"><tspan sodipodi:role="line" id="tspan5373-3-9-7-8-7" - x="505.97882" + x="763.97882" y="874.99164" style="font-size:16px;line-height:1.25;font-family:sans-serif">410 gone</tspan></text> <g @@ -1519,5 +2421,30 @@ style="opacity:0.8;fill:#9b3b1c;fill-opacity:1;fill-rule:nonzero;stroke:#9b3b1c;stroke-width:0;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" sodipodi:type="star" /> </g> + <rect + style="fill:#effab4;fill-opacity:1;fill-rule:nonzero;stroke:#c7d28c;stroke-width:2.735;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" + id="rect5273-7-3-1-8-6-4-8" + width="218.52127" + height="34.993004" + x="77.078499" + y="935.98315" + rx="12.372616" + inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" + inkscape:export-xdpi="89.926643" + inkscape:export-ydpi="89.926643" /> + <text + xml:space="preserve" + style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#77823c;fill-opacity:1;stroke:none" + x="186.57913" + y="959.51965" + id="text5371-43-3-1-7-6" + inkscape:export-filename="/home/essen/ninenines/cowboy/guide/rest_options.png" + inkscape:export-xdpi="89.926643" + inkscape:export-ydpi="89.926643"><tspan + sodipodi:role="line" + x="186.57913" + y="959.51965" + style="font-size:16px;line-height:1.25;font-family:sans-serif" + id="tspan8">416 not satisfiable</tspan></text> </g> </svg> diff --git a/doc/src/guide/rest_handlers.asciidoc b/doc/src/guide/rest_handlers.asciidoc index baf8e6a..19a9859 100644 --- a/doc/src/guide/rest_handlers.asciidoc +++ b/doc/src/guide/rest_handlers.asciidoc @@ -84,6 +84,8 @@ if it is undefined, moving directly to the next step. Similarly, | multiple_choices | `false` | options | `ok` | previously_existed | `false` +| ranges_provided | skip +| range_satisfiable | `true` | rate_limited | `false` | resource_exists | `true` | service_available | `true` @@ -97,8 +99,9 @@ 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` -and `content_types_provided/2`. They can take any name, however +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, @@ -113,9 +116,10 @@ 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. +| 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 @@ -129,11 +133,16 @@ 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/doc/src/guide/rest_start.png b/doc/src/guide/rest_start.png Binary files differindex 4c230a0..bbaa655 100644 --- a/doc/src/guide/rest_start.png +++ b/doc/src/guide/rest_start.png diff --git a/doc/src/guide/rest_start.svg b/doc/src/guide/rest_start.svg index 6f1dd87..9a2646f 100644 --- a/doc/src/guide/rest_start.svg +++ b/doc/src/guide/rest_start.svg @@ -2,24 +2,23 @@ <!-- Created with Inkscape (http://www.inkscape.org/) --> <svg - xmlns:osb="http://www.openswatchbook.org/uri/2009/osb" - xmlns:dc="http://purl.org/dc/elements/1.1/" - xmlns:cc="http://creativecommons.org/ns#" - xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" - xmlns:svg="http://www.w3.org/2000/svg" - xmlns="http://www.w3.org/2000/svg" - xmlns:xlink="http://www.w3.org/1999/xlink" - xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" - xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" width="744.09448819" height="1052.3622047" id="svg2" version="1.1" - inkscape:version="0.92.2 2405546, 2018-03-11" + inkscape:version="1.3.2 (091e20ef0f, 2023-11-25, custom)" sodipodi:docname="rest_start.svg" inkscape:export-filename="/home/essen/Dropbox/Public/drawing.png" inkscape:export-xdpi="90" - inkscape:export-ydpi="90"> + inkscape:export-ydpi="90" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:xlink="http://www.w3.org/1999/xlink" + xmlns="http://www.w3.org/2000/svg" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:dc="http://purl.org/dc/elements/1.1/"> <defs id="defs4"> <linearGradient @@ -50,7 +49,7 @@ </linearGradient> <linearGradient id="linearGradient5233" - osb:paint="solid"> + inkscape:swatch="solid"> <stop style="stop-color:#69d2e7;stop-opacity:1;" offset="0" @@ -65,25 +64,34 @@ inkscape:pageopacity="1" inkscape:pageshadow="2" inkscape:zoom="1.0000001" - inkscape:cx="213.11305" - inkscape:cy="726.77495" + inkscape:cx="293.49997" + inkscape:cy="315.49997" inkscape:document-units="px" inkscape:current-layer="layer1" showgrid="false" - inkscape:window-width="1920" - inkscape:window-height="1043" + inkscape:window-width="1440" + inkscape:window-height="900" inkscape:window-x="0" inkscape:window-y="0" inkscape:window-maximized="1" inkscape:snap-global="true" - showguides="true"> + showguides="true" + inkscape:showpageshadow="2" + inkscape:pagecheckerboard="0" + inkscape:deskcolor="#d1d1d1" + inkscape:export-bgcolor="#ffffffff"> <inkscape:grid type="xygrid" id="grid5357" empspacing="5" - visible="true" + visible="false" enabled="true" - snapvisiblegridlinesonly="true" /> + snapvisiblegridlinesonly="true" + originx="0" + originy="0" + spacingy="1" + spacingx="1" + units="px" /> </sodipodi:namedview> <metadata id="metadata7"> @@ -113,7 +121,8 @@ transform="translate(205.92143,-296.03137)" id="g5650-7" inkscape:export-xdpi="90" - inkscape:export-ydpi="90"> + inkscape:export-ydpi="90" + inkscape:export-filename="rest_start.png"> <path inkscape:connector-curvature="0" id="path5570-9" @@ -921,7 +930,7 @@ id="tspan5373-6-5" x="148.29512" y="728.47717" - style="font-size:16px;line-height:1.25;font-family:sans-serif">valid_content_headers</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">rate_limited</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#6d8e41;fill-opacity:1;stroke:none" @@ -934,7 +943,7 @@ id="tspan5373-6-1" x="147.83809" y="812.14441" - style="font-size:16px;line-height:1.25;font-family:sans-serif">valid_entity_length</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">valid_content_headers</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#6d8e41;fill-opacity:1;stroke:none" @@ -1098,7 +1107,7 @@ id="tspan5373-6-33" x="164.26562" y="771.62329" - style="font-size:16px;line-height:1.25;font-family:sans-serif">true</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">false</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:start;letter-spacing:0px;word-spacing:0px;text-anchor:start;fill:#6d8e41;fill-opacity:1;stroke:none" @@ -1241,7 +1250,7 @@ id="tspan5373-9-5" x="315.26172" y="707.97595" - style="font-size:16px;line-height:1.25;font-family:sans-serif">false</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">true*</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#9b3b1c;fill-opacity:1;stroke:none" @@ -1448,7 +1457,7 @@ id="tspan5373-58" x="524.26172" y="729.9563" - style="font-size:16px;line-height:1.25;font-family:sans-serif">501 not implemented</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">429 too many requests</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#77823c;fill-opacity:1;stroke:none" @@ -1461,7 +1470,7 @@ id="tspan5373-60" x="524.26172" y="813.64819" - style="font-size:16px;line-height:1.25;font-family:sans-serif">413 request entity too large</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">501 not implemented</tspan></text> <rect style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:#a9ca7d;stroke-width:2.44279909;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" id="rect5367" @@ -1576,7 +1585,7 @@ id="tspan5373-6-1-1" x="147.8381" y="895.81165" - style="font-size:16px;line-height:1.25;font-family:sans-serif">rate_limited</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">valid_entity_length</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#6d8e41;fill-opacity:1;stroke:none" @@ -1615,7 +1624,7 @@ id="tspan5373-6-9-6" x="164.26562" y="938.95776" - style="font-size:16px;line-height:1.25;font-family:sans-serif">false</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">true</tspan></text> <text xml:space="preserve" style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;-inkscape-font-specification:Sans;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#9b3b1c;fill-opacity:1;stroke:none" @@ -1628,7 +1637,7 @@ id="tspan5373-9-012-6" x="315.26172" y="875.08826" - style="font-size:16px;line-height:1.25;font-family:sans-serif">true*</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">false</tspan></text> <rect style="fill:#effab4;fill-opacity:1;fill-rule:nonzero;stroke:#c7d28c;stroke-width:3;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" id="rect5273-7-3-5-2" @@ -1651,6 +1660,6 @@ id="tspan5373-60-1" x="524.26172" y="897.31543" - style="font-size:16px;line-height:1.25;font-family:sans-serif">429 too many requests</tspan></text> + style="font-size:16px;line-height:1.25;font-family:sans-serif">413 request entity too large</tspan></text> </g> </svg> diff --git a/doc/src/guide/specs.asciidoc b/doc/src/guide/specs.asciidoc index 32cd206..14736b3 100644 --- a/doc/src/guide/specs.asciidoc +++ b/doc/src/guide/specs.asciidoc @@ -96,6 +96,8 @@ for or related to HTTP. * 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 diff --git a/doc/src/guide/streams.asciidoc b/doc/src/guide/streams.asciidoc index 0ac84ce..e8ddae0 100644 --- a/doc/src/guide/streams.asciidoc +++ b/doc/src/guide/streams.asciidoc @@ -65,6 +65,11 @@ 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. diff --git a/doc/src/guide/ws_handlers.asciidoc b/doc/src/guide/ws_handlers.asciidoc index 5cfdcb1..7005665 100644 --- a/doc/src/guide/ws_handlers.asciidoc +++ b/doc/src/guide/ws_handlers.asciidoc @@ -62,7 +62,7 @@ init(Req0, State) -> undefined -> {cowboy_websocket, Req0, State}; Subprotocols -> - case lists:keymember(<<"mqtt">>, 1, Subprotocols) of + case lists:member(<<"mqtt">>, 1, Subprotocols) of true -> Req = cowboy_req:set_resp_header(<<"sec-websocket-protocol">>, <<"mqtt">>, Req0), |
