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| author | Loïc Hoguin <[email protected]> | 2017-12-11 11:27:17 +0100 |
|---|---|---|
| committer | Loïc Hoguin <[email protected]> | 2017-12-11 11:27:17 +0100 |
| commit | 1b863c350ba1f9b8ad1cb458df514ab0fe6bb127 (patch) | |
| tree | f3f88acba06cce7095a047da8163ac0f92b1a64a /docs | |
| parent | 35825f89b61579d4270d6970609047945277acf7 (diff) | |
| download | ninenines.eu-1b863c350ba1f9b8ad1cb458df514ab0fe6bb127.tar.gz ninenines.eu-1b863c350ba1f9b8ad1cb458df514ab0fe6bb127.tar.bz2 ninenines.eu-1b863c350ba1f9b8ad1cb458df514ab0fe6bb127.zip | |
Add documentation for Cowboy 2.2
Diffstat (limited to 'docs')
327 files changed, 46414 insertions, 0 deletions
diff --git a/docs/en/cowboy/2.0/guide/constraints/index.html b/docs/en/cowboy/2.0/guide/constraints/index.html index d73b061d..f3b9e3e1 100644 --- a/docs/en/cowboy/2.0/guide/constraints/index.html +++ b/docs/en/cowboy/2.0/guide/constraints/index.html @@ -258,6 +258,8 @@ functions. They should be written to not emit any exceptions.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/cookies/index.html b/docs/en/cowboy/2.0/guide/cookies/index.html index 5d56bfaf..dc0adfd7 100644 --- a/docs/en/cowboy/2.0/guide/cookies/index.html +++ b/docs/en/cowboy/2.0/guide/cookies/index.html @@ -261,6 +261,8 @@ exception is thrown.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/erlang_web/index.html b/docs/en/cowboy/2.0/guide/erlang_web/index.html index f8e72f14..af873d5e 100644 --- a/docs/en/cowboy/2.0/guide/erlang_web/index.html +++ b/docs/en/cowboy/2.0/guide/erlang_web/index.html @@ -311,6 +311,8 @@ ebook version.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/flow_diagram/index.html b/docs/en/cowboy/2.0/guide/flow_diagram/index.html index abdec8b9..c891a623 100644 --- a/docs/en/cowboy/2.0/guide/flow_diagram/index.html +++ b/docs/en/cowboy/2.0/guide/flow_diagram/index.html @@ -230,6 +230,8 @@ be the cause.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/getting_started/index.html b/docs/en/cowboy/2.0/guide/getting_started/index.html index 8e80530b..511484d9 100644 --- a/docs/en/cowboy/2.0/guide/getting_started/index.html +++ b/docs/en/cowboy/2.0/guide/getting_started/index.html @@ -278,6 +278,8 @@ in your browser, you should get a nice <code>Hello Erlang!</code> displayed!</p> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/handlers/index.html b/docs/en/cowboy/2.0/guide/handlers/index.html index f1fa61d0..89218952 100644 --- a/docs/en/cowboy/2.0/guide/handlers/index.html +++ b/docs/en/cowboy/2.0/guide/handlers/index.html @@ -208,6 +208,8 @@ process will terminate soon after this call returns.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/index.html b/docs/en/cowboy/2.0/guide/index.html index e908b5b0..c10c7d5f 100644 --- a/docs/en/cowboy/2.0/guide/index.html +++ b/docs/en/cowboy/2.0/guide/index.html @@ -294,6 +294,8 @@ + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/introduction/index.html b/docs/en/cowboy/2.0/guide/introduction/index.html index f1402b5a..a6b83502 100644 --- a/docs/en/cowboy/2.0/guide/introduction/index.html +++ b/docs/en/cowboy/2.0/guide/introduction/index.html @@ -196,6 +196,8 @@ when sending responses.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/listeners/index.html b/docs/en/cowboy/2.0/guide/listeners/index.html index c8efbf0d..2a79dd4c 100644 --- a/docs/en/cowboy/2.0/guide/listeners/index.html +++ b/docs/en/cowboy/2.0/guide/listeners/index.html @@ -226,6 +226,8 @@ shared.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/loop_handlers/index.html b/docs/en/cowboy/2.0/guide/loop_handlers/index.html index ce390b41..eb0a0caf 100644 --- a/docs/en/cowboy/2.0/guide/loop_handlers/index.html +++ b/docs/en/cowboy/2.0/guide/loop_handlers/index.html @@ -248,6 +248,8 @@ accordingly.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/middlewares/index.html b/docs/en/cowboy/2.0/guide/middlewares/index.html index fc4f822b..f764a1cb 100644 --- a/docs/en/cowboy/2.0/guide/middlewares/index.html +++ b/docs/en/cowboy/2.0/guide/middlewares/index.html @@ -209,6 +209,8 @@ values. It puts the result of the request handling into <code>result</code>.</p> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/migrating_from_1.0/index.html b/docs/en/cowboy/2.0/guide/migrating_from_1.0/index.html index f66b424e..75e3ffd1 100644 --- a/docs/en/cowboy/2.0/guide/migrating_from_1.0/index.html +++ b/docs/en/cowboy/2.0/guide/migrating_from_1.0/index.html @@ -495,6 +495,8 @@ The static file handler has been improved to handle more special + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/modern_web/index.html b/docs/en/cowboy/2.0/guide/modern_web/index.html index ec2d3a7e..9b30ce92 100644 --- a/docs/en/cowboy/2.0/guide/modern_web/index.html +++ b/docs/en/cowboy/2.0/guide/modern_web/index.html @@ -228,6 +228,8 @@ the HTTP protocol.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/multipart/index.html b/docs/en/cowboy/2.0/guide/multipart/index.html index 7f6cc95b..74ce4800 100644 --- a/docs/en/cowboy/2.0/guide/multipart/index.html +++ b/docs/en/cowboy/2.0/guide/multipart/index.html @@ -286,6 +286,8 @@ reading as soon as you find the data you need.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/req/index.html b/docs/en/cowboy/2.0/guide/req/index.html index b9198024..1b81cdfc 100644 --- a/docs/en/cowboy/2.0/guide/req/index.html +++ b/docs/en/cowboy/2.0/guide/req/index.html @@ -524,6 +524,8 @@ client itself. It may also be a proxy or a gateway.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/req_body/index.html b/docs/en/cowboy/2.0/guide/req_body/index.html index 53d396e2..f9e056c9 100644 --- a/docs/en/cowboy/2.0/guide/req_body/index.html +++ b/docs/en/cowboy/2.0/guide/req_body/index.html @@ -261,6 +261,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/resource_design/index.html b/docs/en/cowboy/2.0/guide/resource_design/index.html index 688a5f04..11e06315 100644 --- a/docs/en/cowboy/2.0/guide/resource_design/index.html +++ b/docs/en/cowboy/2.0/guide/resource_design/index.html @@ -330,6 +330,8 @@ no way of knowing it has been completed yet, implement the + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/resp/index.html b/docs/en/cowboy/2.0/guide/resp/index.html index ef32be65..e555fe38 100644 --- a/docs/en/cowboy/2.0/guide/resp/index.html +++ b/docs/en/cowboy/2.0/guide/resp/index.html @@ -439,6 +439,8 @@ ultimately send a response to the client.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/rest_flowcharts/index.html b/docs/en/cowboy/2.0/guide/rest_flowcharts/index.html index fa510cf4..8d398a24 100644 --- a/docs/en/cowboy/2.0/guide/rest_flowcharts/index.html +++ b/docs/en/cowboy/2.0/guide/rest_flowcharts/index.html @@ -361,6 +361,8 @@ the results for subsequent use.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/rest_handlers/index.html b/docs/en/cowboy/2.0/guide/rest_handlers/index.html index aa0be7ff..a39b88ed 100644 --- a/docs/en/cowboy/2.0/guide/rest_handlers/index.html +++ b/docs/en/cowboy/2.0/guide/rest_handlers/index.html @@ -400,6 +400,8 @@ cellspacing="0" cellpadding="4"> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/rest_principles/index.html b/docs/en/cowboy/2.0/guide/rest_principles/index.html index c26bf839..6bb1a90c 100644 --- a/docs/en/cowboy/2.0/guide/rest_principles/index.html +++ b/docs/en/cowboy/2.0/guide/rest_principles/index.html @@ -270,6 +270,8 @@ anything specific to the service to operate on it.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/routing/index.html b/docs/en/cowboy/2.0/guide/routing/index.html index 891daf94..715b4111 100644 --- a/docs/en/cowboy/2.0/guide/routing/index.html +++ b/docs/en/cowboy/2.0/guide/routing/index.html @@ -378,6 +378,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/specs/index.html b/docs/en/cowboy/2.0/guide/specs/index.html index bd6f8456..658a452c 100644 --- a/docs/en/cowboy/2.0/guide/specs/index.html +++ b/docs/en/cowboy/2.0/guide/specs/index.html @@ -952,6 +952,8 @@ for or related to HTTP.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/static_files/index.html b/docs/en/cowboy/2.0/guide/static_files/index.html index 2d2e53c8..a60d9564 100644 --- a/docs/en/cowboy/2.0/guide/static_files/index.html +++ b/docs/en/cowboy/2.0/guide/static_files/index.html @@ -290,6 +290,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/streams/index.html b/docs/en/cowboy/2.0/guide/streams/index.html index 22100f9c..393328b5 100644 --- a/docs/en/cowboy/2.0/guide/streams/index.html +++ b/docs/en/cowboy/2.0/guide/streams/index.html @@ -178,6 +178,8 @@ that will modify responses.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/ws_handlers/index.html b/docs/en/cowboy/2.0/guide/ws_handlers/index.html index 8e867c6f..4a450e1d 100644 --- a/docs/en/cowboy/2.0/guide/ws_handlers/index.html +++ b/docs/en/cowboy/2.0/guide/ws_handlers/index.html @@ -387,6 +387,8 @@ close frame will not be sent.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/guide/ws_protocol/index.html b/docs/en/cowboy/2.0/guide/ws_protocol/index.html index 3b1b1cf4..aaae883a 100644 --- a/docs/en/cowboy/2.0/guide/ws_protocol/index.html +++ b/docs/en/cowboy/2.0/guide/ws_protocol/index.html @@ -187,6 +187,8 @@ extensions.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.0/manual/cowboy.set_env/index.html index 3f186eea..660da1e7 100644 --- a/docs/en/cowboy/2.0/manual/cowboy.set_env/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy.set_env/index.html @@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.0/manual/cowboy.start_clear/index.html index d5ae565f..d986b8cc 100644 --- a/docs/en/cowboy/2.0/manual/cowboy.start_clear/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy.start_clear/index.html @@ -243,6 +243,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.0/manual/cowboy.start_tls/index.html index b5b3c4dc..9d239789 100644 --- a/docs/en/cowboy/2.0/manual/cowboy.start_tls/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy.start_tls/index.html @@ -248,6 +248,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.0/manual/cowboy.stop_listener/index.html index 3b4763b8..94f803de 100644 --- a/docs/en/cowboy/2.0/manual/cowboy.stop_listener/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy.stop_listener/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy/index.html b/docs/en/cowboy/2.0/manual/cowboy/index.html index 1e6edce9..6e844a62 100644 --- a/docs/en/cowboy/2.0/manual/cowboy/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy/index.html @@ -224,6 +224,8 @@ and the HTTP/2 options in + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_app/index.html b/docs/en/cowboy/2.0/manual/cowboy_app/index.html index 93eb3277..d20f61fc 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_app/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_app/index.html @@ -266,6 +266,8 @@ environment configuration parameters.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.0/manual/cowboy_constraints.int/index.html index ae991fd2..e3c0c1c2 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_constraints.int/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_constraints.int/index.html @@ -187,6 +187,8 @@ and the value as second argument.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.0/manual/cowboy_constraints.nonempty/index.html index 93f483c4..975b29b4 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_constraints.nonempty/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_constraints.nonempty/index.html @@ -186,6 +186,8 @@ and the value as second argument.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.0/manual/cowboy_constraints/index.html index b171793c..93085a69 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_constraints/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_constraints/index.html @@ -179,6 +179,8 @@ made the constraint fail.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.0/manual/cowboy_handler.terminate/index.html index 657eac26..50a9c993 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_handler.terminate/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_handler.terminate/index.html @@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_handler/index.html b/docs/en/cowboy/2.0/manual/cowboy_handler/index.html index 8a9ea6f2..70bc1b52 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_handler/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_handler/index.html @@ -191,6 +191,8 @@ custom handlers to execute the optional terminate callback:</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_http/index.html b/docs/en/cowboy/2.0/manual/cowboy_http/index.html index 7212815d..c6e4568d 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_http/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_http/index.html @@ -335,6 +335,8 @@ stream_handlers ([cowboy_stream_h]) + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_http2/index.html b/docs/en/cowboy/2.0/manual/cowboy_http2/index.html index e381f250..e9a57871 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_http2/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_http2/index.html @@ -218,6 +218,8 @@ stream_handlers ([cowboy_stream_h]) + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_loop/index.html b/docs/en/cowboy/2.0/manual/cowboy_loop/index.html index 51d99a75..7e9d6707 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_loop/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_loop/index.html @@ -215,6 +215,8 @@ stop + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.0/manual/cowboy_middleware/index.html index df724703..31d3703f 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_middleware/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_middleware/index.html @@ -210,6 +210,8 @@ contains the name of the listener for this connection.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.binding/index.html index 05367e32..8dfcdf19 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.binding/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.binding/index.html @@ -211,6 +211,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.bindings/index.html index b1e82ffb..148a9d8f 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.bindings/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.bindings/index.html @@ -181,6 +181,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.body_length/index.html index 57ba60cf..5cd380bf 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.body_length/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.body_length/index.html @@ -184,6 +184,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.delete_resp_header/index.html index 33d13534..dd48e288 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.delete_resp_header/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.delete_resp_header/index.html @@ -190,6 +190,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.has_body/index.html index 3203db5d..0aeb3ecc 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.has_body/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.has_body/index.html @@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_body/index.html index 405fd209..e25d60e5 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_body/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_body/index.html @@ -177,6 +177,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_header/index.html index 7d8d98f6..08324a08 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_header/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_header/index.html @@ -190,6 +190,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.header/index.html index f81ff4f5..72a9abc6 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.header/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.header/index.html @@ -217,6 +217,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.headers/index.html index 86ecae98..ed700882 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.headers/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.headers/index.html @@ -185,6 +185,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.host/index.html index 8df8dbc2..d26e0244 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.host/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.host/index.html @@ -186,6 +186,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.host_info/index.html index 2c7c38ff..ee968e16 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.host_info/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.host_info/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.match_cookies/index.html index 6d1e6e6f..72d33d71 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.match_cookies/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.match_cookies/index.html @@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.match_qs/index.html index 27372935..3ae2ffbc 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.match_qs/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.match_qs/index.html @@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.method/index.html index df1d0f74..7ff52fad 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.method/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.method/index.html @@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.parse_cookies/index.html index 927c3d0c..5a0cc993 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.parse_cookies/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.parse_cookies/index.html @@ -186,6 +186,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.parse_header/index.html index bb926a82..f7485d84 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.parse_header/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.parse_header/index.html @@ -378,6 +378,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.parse_qs/index.html index 0e6ad1ff..fb605113 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.parse_qs/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.parse_qs/index.html @@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.path/index.html index 939b10fc..43b3d768 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.path/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.path/index.html @@ -185,6 +185,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.path_info/index.html index 4ea06181..ceeff5a7 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.path_info/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.path_info/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.peer/index.html index 528e85c6..65386eec 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.peer/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.peer/index.html @@ -191,6 +191,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.port/index.html index 3415e1ba..39124a8c 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.port/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.port/index.html @@ -185,6 +185,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.push/index.html index 8ed8ad68..62eaec56 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.push/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.push/index.html @@ -236,6 +236,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.qs/index.html index b83daa81..68a474d6 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.qs/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.qs/index.html @@ -184,6 +184,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.read_body/index.html index afe62497..ec523c76 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.read_body/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.read_body/index.html @@ -238,6 +238,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.read_part/index.html index 93f82820..3fd95170 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.read_part/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.read_part/index.html @@ -257,6 +257,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.read_part_body/index.html index afebd5f0..f4c43e0d 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.read_part_body/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.read_part_body/index.html @@ -225,6 +225,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.read_urlencoded_body/index.html index 87e67a1b..87136df0 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.read_urlencoded_body/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.read_urlencoded_body/index.html @@ -221,6 +221,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.reply/index.html index b8a30a0d..2fedd63e 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.reply/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.reply/index.html @@ -259,6 +259,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.resp_header/index.html index 1d651aa0..73e6e56b 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.resp_header/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.resp_header/index.html @@ -208,6 +208,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.resp_headers/index.html index 1c9ad4ae..b110e47f 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.resp_headers/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.resp_headers/index.html @@ -174,6 +174,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.scheme/index.html index fad56494..9de6f558 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.scheme/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.scheme/index.html @@ -184,6 +184,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_body/index.html index 70ddf9d9..45e0eecf 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_body/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_body/index.html @@ -233,6 +233,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_cookie/index.html index 8745207c..a3159ef9 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_cookie/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_cookie/index.html @@ -262,6 +262,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_header/index.html index cc452f4a..9fedddb8 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_header/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_header/index.html @@ -216,6 +216,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_headers/index.html index ebb1b8f6..5592da41 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_headers/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_headers/index.html @@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.stream_body/index.html index 27db384e..abeb644e 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.stream_body/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.stream_body/index.html @@ -211,6 +211,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.stream_reply/index.html index 65fa44c3..b63c4d12 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.stream_reply/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.stream_reply/index.html @@ -243,6 +243,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.uri/index.html index bc96f18a..510da965 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.uri/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.uri/index.html @@ -272,6 +272,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.0/manual/cowboy_req.version/index.html index 21a6a49e..86551ac0 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req.version/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req.version/index.html @@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_req/index.html b/docs/en/cowboy/2.0/manual/cowboy_req/index.html index 0d09edb7..3ae043d6 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_req/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_req/index.html @@ -484,6 +484,8 @@ is zero.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_rest/index.html b/docs/en/cowboy/2.0/manual/cowboy_rest/index.html index 3ffa1cd4..0128373b 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_rest/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_rest/index.html @@ -736,6 +736,8 @@ accept-language headers when necessary.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.0/manual/cowboy_router.compile/index.html index 808cc716..02ff8539 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_router.compile/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_router.compile/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_router/index.html b/docs/en/cowboy/2.0/manual/cowboy_router/index.html index 1be8f8e7..5504d4d1 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_router/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_router/index.html @@ -205,6 +205,8 @@ using the <code>...</code> syntax.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_static/index.html b/docs/en/cowboy/2.0/manual/cowboy_static/index.html index 15648c2d..24e6e6c6 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_static/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_static/index.html @@ -270,6 +270,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_stream/index.html b/docs/en/cowboy/2.0/manual/cowboy_stream/index.html index 6527c30b..21f8aaad 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_stream/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_stream/index.html @@ -506,6 +506,8 @@ tuple.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.0/manual/cowboy_websocket/index.html index 2b8ada8b..806266e6 100644 --- a/docs/en/cowboy/2.0/manual/cowboy_websocket/index.html +++ b/docs/en/cowboy/2.0/manual/cowboy_websocket/index.html @@ -390,6 +390,8 @@ req_filter + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/http_status_codes/index.html b/docs/en/cowboy/2.0/manual/http_status_codes/index.html index f2fbc270..48e95333 100644 --- a/docs/en/cowboy/2.0/manual/http_status_codes/index.html +++ b/docs/en/cowboy/2.0/manual/http_status_codes/index.html @@ -366,6 +366,8 @@ client and the connection is closed.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.0/manual/index.html b/docs/en/cowboy/2.0/manual/index.html index 58588de9..3ba8b1e0 100644 --- a/docs/en/cowboy/2.0/manual/index.html +++ b/docs/en/cowboy/2.0/manual/index.html @@ -266,6 +266,8 @@ environment configuration parameters.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/constraints/index.html b/docs/en/cowboy/2.1/guide/constraints/index.html index a86962fe..e1286d9b 100644 --- a/docs/en/cowboy/2.1/guide/constraints/index.html +++ b/docs/en/cowboy/2.1/guide/constraints/index.html @@ -258,6 +258,8 @@ functions. They should be written to not emit any exceptions.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/cookies/index.html b/docs/en/cowboy/2.1/guide/cookies/index.html index 546e5c57..3784d36b 100644 --- a/docs/en/cowboy/2.1/guide/cookies/index.html +++ b/docs/en/cowboy/2.1/guide/cookies/index.html @@ -261,6 +261,8 @@ exception is thrown.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/erlang_web/index.html b/docs/en/cowboy/2.1/guide/erlang_web/index.html index b9200713..9bc44319 100644 --- a/docs/en/cowboy/2.1/guide/erlang_web/index.html +++ b/docs/en/cowboy/2.1/guide/erlang_web/index.html @@ -311,6 +311,8 @@ ebook version.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/flow_diagram/index.html b/docs/en/cowboy/2.1/guide/flow_diagram/index.html index 8e2f5522..3906b94e 100644 --- a/docs/en/cowboy/2.1/guide/flow_diagram/index.html +++ b/docs/en/cowboy/2.1/guide/flow_diagram/index.html @@ -230,6 +230,8 @@ be the cause.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/getting_started/index.html b/docs/en/cowboy/2.1/guide/getting_started/index.html index 8ebd8629..3b820d13 100644 --- a/docs/en/cowboy/2.1/guide/getting_started/index.html +++ b/docs/en/cowboy/2.1/guide/getting_started/index.html @@ -278,6 +278,8 @@ in your browser, you should get a nice <code>Hello Erlang!</code> displayed!</p> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/handlers/index.html b/docs/en/cowboy/2.1/guide/handlers/index.html index 9d4b1bf3..d3d1d859 100644 --- a/docs/en/cowboy/2.1/guide/handlers/index.html +++ b/docs/en/cowboy/2.1/guide/handlers/index.html @@ -208,6 +208,8 @@ process will terminate soon after this call returns.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/index.html b/docs/en/cowboy/2.1/guide/index.html index b5af3291..bc7e6ead 100644 --- a/docs/en/cowboy/2.1/guide/index.html +++ b/docs/en/cowboy/2.1/guide/index.html @@ -299,6 +299,8 @@ + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/introduction/index.html b/docs/en/cowboy/2.1/guide/introduction/index.html index fa633e57..85fd698b 100644 --- a/docs/en/cowboy/2.1/guide/introduction/index.html +++ b/docs/en/cowboy/2.1/guide/introduction/index.html @@ -196,6 +196,8 @@ when sending responses.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/listeners/index.html b/docs/en/cowboy/2.1/guide/listeners/index.html index f0a7d95f..68eae270 100644 --- a/docs/en/cowboy/2.1/guide/listeners/index.html +++ b/docs/en/cowboy/2.1/guide/listeners/index.html @@ -226,6 +226,8 @@ shared.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/loop_handlers/index.html b/docs/en/cowboy/2.1/guide/loop_handlers/index.html index 31412c7b..fd64cff4 100644 --- a/docs/en/cowboy/2.1/guide/loop_handlers/index.html +++ b/docs/en/cowboy/2.1/guide/loop_handlers/index.html @@ -248,6 +248,8 @@ accordingly.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/middlewares/index.html b/docs/en/cowboy/2.1/guide/middlewares/index.html index 8dc24be9..2537e467 100644 --- a/docs/en/cowboy/2.1/guide/middlewares/index.html +++ b/docs/en/cowboy/2.1/guide/middlewares/index.html @@ -209,6 +209,8 @@ values. It puts the result of the request handling into <code>result</code>.</p> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/migrating_from_1.0/index.html b/docs/en/cowboy/2.1/guide/migrating_from_1.0/index.html index c9f1c628..0dc9c061 100644 --- a/docs/en/cowboy/2.1/guide/migrating_from_1.0/index.html +++ b/docs/en/cowboy/2.1/guide/migrating_from_1.0/index.html @@ -505,6 +505,8 @@ The static file handler has been improved to handle more special + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/migrating_from_2.0/index.html b/docs/en/cowboy/2.1/guide/migrating_from_2.0/index.html index 2e4a1d66..5bd13649 100644 --- a/docs/en/cowboy/2.1/guide/migrating_from_2.0/index.html +++ b/docs/en/cowboy/2.1/guide/migrating_from_2.0/index.html @@ -305,6 +305,8 @@ Cowboy will no longer crash when the <code>cowboy_clock</code> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/modern_web/index.html b/docs/en/cowboy/2.1/guide/modern_web/index.html index 4fd014d2..b4ffab83 100644 --- a/docs/en/cowboy/2.1/guide/modern_web/index.html +++ b/docs/en/cowboy/2.1/guide/modern_web/index.html @@ -228,6 +228,8 @@ the HTTP protocol.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/multipart/index.html b/docs/en/cowboy/2.1/guide/multipart/index.html index 509462c6..1125aeb3 100644 --- a/docs/en/cowboy/2.1/guide/multipart/index.html +++ b/docs/en/cowboy/2.1/guide/multipart/index.html @@ -286,6 +286,8 @@ reading as soon as you find the data you need.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/req/index.html b/docs/en/cowboy/2.1/guide/req/index.html index cfc7b97e..856d23f1 100644 --- a/docs/en/cowboy/2.1/guide/req/index.html +++ b/docs/en/cowboy/2.1/guide/req/index.html @@ -524,6 +524,8 @@ client itself. It may also be a proxy or a gateway.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/req_body/index.html b/docs/en/cowboy/2.1/guide/req_body/index.html index 724d2f6a..a5c7c3fc 100644 --- a/docs/en/cowboy/2.1/guide/req_body/index.html +++ b/docs/en/cowboy/2.1/guide/req_body/index.html @@ -261,6 +261,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/resource_design/index.html b/docs/en/cowboy/2.1/guide/resource_design/index.html index 42e31625..4ffeb293 100644 --- a/docs/en/cowboy/2.1/guide/resource_design/index.html +++ b/docs/en/cowboy/2.1/guide/resource_design/index.html @@ -330,6 +330,8 @@ no way of knowing it has been completed yet, implement the + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/resp/index.html b/docs/en/cowboy/2.1/guide/resp/index.html index 9caa66d8..89bdc948 100644 --- a/docs/en/cowboy/2.1/guide/resp/index.html +++ b/docs/en/cowboy/2.1/guide/resp/index.html @@ -463,6 +463,8 @@ ultimately send a response to the client.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/rest_flowcharts/index.html b/docs/en/cowboy/2.1/guide/rest_flowcharts/index.html index eadfcc74..a97a4cbf 100644 --- a/docs/en/cowboy/2.1/guide/rest_flowcharts/index.html +++ b/docs/en/cowboy/2.1/guide/rest_flowcharts/index.html @@ -361,6 +361,8 @@ the results for subsequent use.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/rest_handlers/index.html b/docs/en/cowboy/2.1/guide/rest_handlers/index.html index beebdf4a..1b961deb 100644 --- a/docs/en/cowboy/2.1/guide/rest_handlers/index.html +++ b/docs/en/cowboy/2.1/guide/rest_handlers/index.html @@ -404,6 +404,8 @@ cellspacing="0" cellpadding="4"> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/rest_principles/index.html b/docs/en/cowboy/2.1/guide/rest_principles/index.html index 17ab197e..eb1c98ec 100644 --- a/docs/en/cowboy/2.1/guide/rest_principles/index.html +++ b/docs/en/cowboy/2.1/guide/rest_principles/index.html @@ -270,6 +270,8 @@ anything specific to the service to operate on it.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/routing/index.html b/docs/en/cowboy/2.1/guide/routing/index.html index 6b1a2748..dfc4888f 100644 --- a/docs/en/cowboy/2.1/guide/routing/index.html +++ b/docs/en/cowboy/2.1/guide/routing/index.html @@ -378,6 +378,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/specs/index.html b/docs/en/cowboy/2.1/guide/specs/index.html index 3eb1f286..85a03e51 100644 --- a/docs/en/cowboy/2.1/guide/specs/index.html +++ b/docs/en/cowboy/2.1/guide/specs/index.html @@ -952,6 +952,8 @@ for or related to HTTP.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/static_files/index.html b/docs/en/cowboy/2.1/guide/static_files/index.html index f0740821..23a036ce 100644 --- a/docs/en/cowboy/2.1/guide/static_files/index.html +++ b/docs/en/cowboy/2.1/guide/static_files/index.html @@ -290,6 +290,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/streams/index.html b/docs/en/cowboy/2.1/guide/streams/index.html index 1efbb2e2..afa7b568 100644 --- a/docs/en/cowboy/2.1/guide/streams/index.html +++ b/docs/en/cowboy/2.1/guide/streams/index.html @@ -178,6 +178,8 @@ that will modify responses.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/ws_handlers/index.html b/docs/en/cowboy/2.1/guide/ws_handlers/index.html index 6e20b0ab..5fe6f554 100644 --- a/docs/en/cowboy/2.1/guide/ws_handlers/index.html +++ b/docs/en/cowboy/2.1/guide/ws_handlers/index.html @@ -388,6 +388,8 @@ close frame will not be sent.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/guide/ws_protocol/index.html b/docs/en/cowboy/2.1/guide/ws_protocol/index.html index ff47904e..f277b092 100644 --- a/docs/en/cowboy/2.1/guide/ws_protocol/index.html +++ b/docs/en/cowboy/2.1/guide/ws_protocol/index.html @@ -187,6 +187,8 @@ extensions.</p></div> + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.1/manual/cowboy.set_env/index.html index 7aa68373..1724683e 100644 --- a/docs/en/cowboy/2.1/manual/cowboy.set_env/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy.set_env/index.html @@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.1/manual/cowboy.start_clear/index.html index 539c8738..fcf1181f 100644 --- a/docs/en/cowboy/2.1/manual/cowboy.start_clear/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy.start_clear/index.html @@ -243,6 +243,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.1/manual/cowboy.start_tls/index.html index e64890d7..29a0e58e 100644 --- a/docs/en/cowboy/2.1/manual/cowboy.start_tls/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy.start_tls/index.html @@ -248,6 +248,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.1/manual/cowboy.stop_listener/index.html index 7a453671..c6875ae2 100644 --- a/docs/en/cowboy/2.1/manual/cowboy.stop_listener/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy.stop_listener/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy/index.html b/docs/en/cowboy/2.1/manual/cowboy/index.html index fde1197e..3ef2d353 100644 --- a/docs/en/cowboy/2.1/manual/cowboy/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy/index.html @@ -224,6 +224,8 @@ and the HTTP/2 options in + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_app/index.html b/docs/en/cowboy/2.1/manual/cowboy_app/index.html index 5fc0da91..81c2e05e 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_app/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_app/index.html @@ -266,6 +266,8 @@ environment configuration parameters.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.1/manual/cowboy_constraints.int/index.html index 8a3a75de..1bb3f549 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_constraints.int/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_constraints.int/index.html @@ -187,6 +187,8 @@ and the value as second argument.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.1/manual/cowboy_constraints.nonempty/index.html index 92afe16a..05d9de2d 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_constraints.nonempty/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_constraints.nonempty/index.html @@ -186,6 +186,8 @@ and the value as second argument.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.1/manual/cowboy_constraints/index.html index c80f51f5..1e3c1100 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_constraints/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_constraints/index.html @@ -179,6 +179,8 @@ made the constraint fail.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.1/manual/cowboy_handler.terminate/index.html index 8b7f3cd8..49f32273 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_handler.terminate/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_handler.terminate/index.html @@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_handler/index.html b/docs/en/cowboy/2.1/manual/cowboy_handler/index.html index e83b6fab..3a3c3b6f 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_handler/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_handler/index.html @@ -191,6 +191,8 @@ custom handlers to execute the optional terminate callback:</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_http/index.html b/docs/en/cowboy/2.1/manual/cowboy_http/index.html index d344048d..de8dc8b3 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_http/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_http/index.html @@ -335,6 +335,8 @@ stream_handlers ([cowboy_stream_h]) + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_http2/index.html b/docs/en/cowboy/2.1/manual/cowboy_http2/index.html index c16719ff..97a8e968 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_http2/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_http2/index.html @@ -218,6 +218,8 @@ stream_handlers ([cowboy_stream_h]) + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_loop/index.html b/docs/en/cowboy/2.1/manual/cowboy_loop/index.html index 81eb68a5..ea3ef6c6 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_loop/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_loop/index.html @@ -215,6 +215,8 @@ stop + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.1/manual/cowboy_middleware/index.html index 96db75ce..a142480d 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_middleware/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_middleware/index.html @@ -210,6 +210,8 @@ contains the name of the listener for this connection.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.binding/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.binding/index.html index 6e91f43d..43ff1756 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.binding/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.binding/index.html @@ -211,6 +211,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.bindings/index.html index fba98427..0bacf5c4 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.bindings/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.bindings/index.html @@ -181,6 +181,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.body_length/index.html index 9e7d7801..718a3df1 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.body_length/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.body_length/index.html @@ -184,6 +184,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.cert/index.html index b389bf7d..62845be2 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.cert/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.cert/index.html @@ -199,6 +199,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.delete_resp_header/index.html index 86481a6a..4c7d55f9 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.delete_resp_header/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.delete_resp_header/index.html @@ -190,6 +190,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.has_body/index.html index de228002..b81bb505 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.has_body/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.has_body/index.html @@ -175,6 +175,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_body/index.html index a574744f..5fe4ca50 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_body/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_body/index.html @@ -177,6 +177,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_header/index.html index f3d69ac9..1e86da33 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_header/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.has_resp_header/index.html @@ -190,6 +190,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.header/index.html index 4937b9b6..db5c75b8 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.header/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.header/index.html @@ -217,6 +217,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.headers/index.html index 17d40168..d404a03d 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.headers/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.headers/index.html @@ -185,6 +185,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.host/index.html index a7f1f8f0..f25aa5bd 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.host/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.host/index.html @@ -186,6 +186,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.host_info/index.html index 642dc273..29cd510e 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.host_info/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.host_info/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.inform/index.html index 4417251e..88737f96 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.inform/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.inform/index.html @@ -220,6 +220,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.match_cookies/index.html index 7fcc978f..f4b23823 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.match_cookies/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.match_cookies/index.html @@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.match_qs/index.html index b1ae218c..94db62ad 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.match_qs/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.match_qs/index.html @@ -218,6 +218,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.method/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.method/index.html index 9463941a..f9d1d54f 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.method/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.method/index.html @@ -195,6 +195,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.parse_cookies/index.html index b8da0ffd..7d417584 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.parse_cookies/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.parse_cookies/index.html @@ -186,6 +186,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.parse_header/index.html index 99334ad7..2764df08 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.parse_header/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.parse_header/index.html @@ -378,6 +378,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.parse_qs/index.html index a70ae879..5139d1ec 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.parse_qs/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.parse_qs/index.html @@ -212,6 +212,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.path/index.html index 2fa48b5f..493f5d54 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.path/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.path/index.html @@ -185,6 +185,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.path_info/index.html index 433044b1..e4081b42 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.path_info/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.path_info/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.peer/index.html index c5c11501..ac35c6ed 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.peer/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.peer/index.html @@ -193,6 +193,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.port/index.html index 7306d0d2..6f69a18e 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.port/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.port/index.html @@ -185,6 +185,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.push/index.html index e40aa5b5..1eb398eb 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.push/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.push/index.html @@ -237,6 +237,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.qs/index.html index 8eb98e1c..37ee6d21 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.qs/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.qs/index.html @@ -184,6 +184,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.read_body/index.html index fe0ab87c..6b431366 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.read_body/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.read_body/index.html @@ -238,6 +238,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.read_part/index.html index 1e0fb043..07cf725b 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.read_part/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.read_part/index.html @@ -257,6 +257,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.read_part_body/index.html index 01c2c7af..e5405f6b 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.read_part_body/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.read_part_body/index.html @@ -225,6 +225,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.read_urlencoded_body/index.html index 19363fe7..64ac79e1 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.read_urlencoded_body/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.read_urlencoded_body/index.html @@ -221,6 +221,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.reply/index.html index bdfb7287..7d662c37 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.reply/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.reply/index.html @@ -260,6 +260,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.resp_header/index.html index e3e4fce8..39acdfea 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.resp_header/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.resp_header/index.html @@ -208,6 +208,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.resp_headers/index.html index 23593435..46b090a1 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.resp_headers/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.resp_headers/index.html @@ -174,6 +174,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.scheme/index.html index 4ee243d9..44babceb 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.scheme/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.scheme/index.html @@ -184,6 +184,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_body/index.html index cf7a2d73..ab356210 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_body/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_body/index.html @@ -233,6 +233,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_cookie/index.html index 87949aa7..ce6fa1b5 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_cookie/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_cookie/index.html @@ -262,6 +262,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_header/index.html index 44fb3122..37f69250 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_header/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_header/index.html @@ -216,6 +216,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_headers/index.html index 48828ae9..82166390 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_headers/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.set_resp_headers/index.html @@ -204,6 +204,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.sock/index.html index 4eb3930b..50bef703 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.sock/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.sock/index.html @@ -181,6 +181,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.stream_body/index.html index 544048a4..4888c433 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.stream_body/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.stream_body/index.html @@ -211,6 +211,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.stream_reply/index.html index 19f8d9ef..26e732bc 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.stream_reply/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.stream_reply/index.html @@ -244,6 +244,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.uri/index.html index caf140e8..1411cd4d 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.uri/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.uri/index.html @@ -272,6 +272,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.1/manual/cowboy_req.version/index.html index d0747cd4..5a414e7d 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req.version/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req.version/index.html @@ -183,6 +183,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_req/index.html b/docs/en/cowboy/2.1/manual/cowboy_req/index.html index 4076b2b1..f245ed15 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_req/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_req/index.html @@ -504,6 +504,8 @@ is zero.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_rest/index.html b/docs/en/cowboy/2.1/manual/cowboy_rest/index.html index 3eafcbda..b9b58d6d 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_rest/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_rest/index.html @@ -763,6 +763,8 @@ accept-language headers when necessary.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.1/manual/cowboy_router.compile/index.html index b119608c..f79d3e68 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_router.compile/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_router.compile/index.html @@ -182,6 +182,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_router/index.html b/docs/en/cowboy/2.1/manual/cowboy_router/index.html index db9794b3..642f12a7 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_router/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_router/index.html @@ -205,6 +205,8 @@ using the <code>...</code> syntax.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_static/index.html b/docs/en/cowboy/2.1/manual/cowboy_static/index.html index 3833700f..8b372dea 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_static/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_static/index.html @@ -270,6 +270,8 @@ http://www.gnu.org/software/src-highlite --> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_stream/index.html b/docs/en/cowboy/2.1/manual/cowboy_stream/index.html index 2dd1200b..fa384b73 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_stream/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_stream/index.html @@ -506,6 +506,8 @@ tuple.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.1/manual/cowboy_websocket/index.html index 4ecadb49..aab46150 100644 --- a/docs/en/cowboy/2.1/manual/cowboy_websocket/index.html +++ b/docs/en/cowboy/2.1/manual/cowboy_websocket/index.html @@ -390,6 +390,8 @@ req_filter + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/http_status_codes/index.html b/docs/en/cowboy/2.1/manual/http_status_codes/index.html index 8349dd0f..8cf60771 100644 --- a/docs/en/cowboy/2.1/manual/http_status_codes/index.html +++ b/docs/en/cowboy/2.1/manual/http_status_codes/index.html @@ -366,6 +366,8 @@ client and the connection is closed.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.1/manual/index.html b/docs/en/cowboy/2.1/manual/index.html index 043f1c5e..8da0dd3b 100644 --- a/docs/en/cowboy/2.1/manual/index.html +++ b/docs/en/cowboy/2.1/manual/index.html @@ -266,6 +266,8 @@ environment configuration parameters.</p></div> + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> diff --git a/docs/en/cowboy/2.2/guide/constraints.asciidoc b/docs/en/cowboy/2.2/guide/constraints.asciidoc new file mode 100644 index 00000000..6cc10752 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/constraints.asciidoc @@ -0,0 +1,123 @@ +[[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 `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/2.2/guide/constraints/index.html b/docs/en/cowboy/2.2/guide/constraints/index.html new file mode 100644 index 00000000..81865da6 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/constraints/index.html @@ -0,0 +1,300 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Constraints</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="paragraph"><p>Constraints are validation and conversion functions applied +to user input.</p></div> +<div class="paragraph"><p>They are used in various places in Cowboy, including the +router and the <code>cowboy_req</code> match functions.</p></div> +<div class="sect1"> +<h2 id="_syntax">Syntax</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PositiveFun</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">fun</span></span> + (<span style="color: #990000">_</span>, <span style="color: #009900">V</span>) <span style="font-weight: bold"><span style="color: #0000FF">when</span></span> <span style="color: #009900">V</span> <span style="color: #990000">></span> <span style="color: #993399">0</span> <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">V</span>}; + (<span style="color: #990000">_</span>, <span style="color: #990000">_</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">not_positive</span>} +<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>, +{<span style="color: #FF6600">my_value</span>, [<span style="color: #FF6600">int</span>, <span style="color: #009900">PositiveFun</span>]}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>We ignore the first fun argument in this snippet. We shouldn’t. +We will simply learn what it is later in this chapter.</p></div> +<div class="paragraph"><p>When there’s only one constraint, it can be provided directly +without wrapping it into a list:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">my_value</span>, <span style="color: #FF6600">int</span>}</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_built_in_constraints">Built-in constraints</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Built-in constraints are specified as an atom:</p></div> +<div class="tableblock"> +<table rules="all" +width="100%" +frame="border" +cellspacing="0" cellpadding="4"> +<col width="50%" /> +<col width="50%" /> +<thead> +<tr> +<th align="left" valign="top"> Constraint </th> +<th align="left" valign="top"> Description</th> +</tr> +</thead> +<tbody> +<tr> +<td align="left" valign="top"><p class="table">int</p></td> +<td align="left" valign="top"><p class="table">Converts binary value to integer.</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">nonempty</p></td> +<td align="left" valign="top"><p class="table">Ensures the binary value is non-empty.</p></td> +</tr> +</tbody> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_custom_constraints">Custom constraints</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy currently defines three operations. The operation +used for validating and converting user input is the <code>forward</code> +operation.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">int</span></span>(<span style="color: #FF6600">forward</span>, <span style="color: #009900">Value</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">try</span></span> + {<span style="color: #FF6600">ok</span>, <span style="font-weight: bold"><span style="color: #000000">binary_to_integer</span></span>(<span style="color: #009900">Value</span>)} + <span style="font-weight: bold"><span style="color: #0000FF">catch</span></span> <span style="color: #990000">_:_</span> <span style="color: #990000">-></span> + {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">not_an_integer</span>} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>;</tt></pre></div></div> +<div class="paragraph"><p>The value must be returned even if it is not converted +by the constraint.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">int</span></span>(<span style="color: #FF6600">reverse</span>, <span style="color: #009900">Value</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">try</span></span> + {<span style="color: #FF6600">ok</span>, <span style="font-weight: bold"><span style="color: #000000">integer_to_binary</span></span>(<span style="color: #009900">Value</span>)} + <span style="font-weight: bold"><span style="color: #0000FF">catch</span></span> <span style="color: #990000">_:_</span> <span style="color: #990000">-></span> + {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">not_an_integer</span>} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>;</tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">int</span></span>(<span style="color: #FF6600">format_error</span>, {<span style="color: #FF6600">not_an_integer</span>, <span style="color: #009900">Value</span>}) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">io_lib:format</span></span>(<span style="color: #FF0000">"The value ~p is not an integer."</span>, [<span style="color: #009900">Value</span>])<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy will not catch exceptions coming from constraint +functions. They should be written to not emit any exceptions.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/routing/"> + Routing + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/handlers/"> + Handlers + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/cookies.asciidoc b/docs/en/cowboy/2.2/guide/cookies.asciidoc new file mode 100644 index 00000000..4825031b --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/cookies/index.html b/docs/en/cowboy/2.2/guide/cookies/index.html new file mode 100644 index 00000000..28a3759c --- /dev/null +++ b/docs/en/cowboy/2.2/guide/cookies/index.html @@ -0,0 +1,303 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="paragraph"><p>Cookies are a mechanism allowing applications to maintain +state on top of the stateless HTTP protocol.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cookie names are de facto case sensitive.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>Cookies set by the server are only available in requests +following the client reception of the response containing +them.</p></div> +<div class="paragraph"><p>Cookies may be sent repeatedly. This is often useful to +update the expiration time and avoid losing a cookie.</p></div> +<div class="sect1"> +<h2 id="_setting_cookies">Setting cookies</h2> +<div class="sectionbody"> +<div class="paragraph"><p>By default cookies are defined for the duration of the session:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">generate_session_id</span></span>(), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>They can also be set for a duration in seconds:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">generate_session_id</span></span>(), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, <span style="color: #009900">Req0</span>, + #{<span style="color: #0000FF">max_age</span> <span style="color: #990000">=></span> <span style="color: #993399">3600</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>To delete cookies, set <code>max_age</code> to 0:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">generate_session_id</span></span>(), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, <span style="color: #009900">Req0</span>, + #{<span style="color: #0000FF">max_age</span> <span style="color: #990000">=></span> <span style="color: #993399">0</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>To restrict cookies to a specific domain and path, the options +of the same name can be used:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"inaccount"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"1"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>, + #{<span style="color: #0000FF">domain</span> <span style="color: #990000">=></span> <span style="color: #FF0000">"my.example.org"</span>, <span style="color: #0000FF">path</span> <span style="color: #990000">=></span> <span style="color: #FF0000">"/account"</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To restrict cookies to secure channels (typically resources +available over HTTPS):</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">generate_session_id</span></span>(), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, <span style="color: #009900">Req0</span>, + #{<span style="color: #0000FF">secure</span> <span style="color: #990000">=></span> <span style="color: #000080">true</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>To prevent client-side scripts from accessing a cookie:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">generate_session_id</span></span>(), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, <span style="color: #009900">Req0</span>, + #{<span style="color: #0000FF">http_only</span> <span style="color: #990000">=></span> <span style="color: #000080">true</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Cookies may also be set client-side, for example using +Javascript.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_reading_cookies">Reading cookies</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The client only ever sends back the cookie name and value. +All other options that can be set are never sent back.</p></div> +<div class="paragraph"><p>Cowboy provides two functions for reading cookies. Both +involve parsing the cookie header(s) and so should not +be called repeatedly.</p></div> +<div class="paragraph"><p>You can get all cookies as a key/value list:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Cookies</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_cookies</span></span>(<span style="color: #009900">Req</span>), +{<span style="color: #990000">_</span>, <span style="color: #009900">Lang</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">lists:keyfind</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"lang"</span><span style="color: #990000">>></span>, <span style="color: #993399">1</span>, <span style="color: #009900">Cookies</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">id</span> <span style="color: #990000">:=</span> <span style="color: #009900">ID</span>, <span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_cookies</span></span>([<span style="color: #FF6600">id</span>, <span style="color: #FF6600">lang</span>], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">CookiesMap</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_cookies</span></span>([{<span style="color: #FF6600">id</span>, <span style="color: #FF6600">int</span>}, {<span style="color: #FF6600">lang</span>, <span style="color: #FF6600">nonempty</span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Note that if two cookies share the same name, then the map value +will be a list of the two cookie values.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_cookies</span></span>([{<span style="color: #FF6600">lang</span>, [], <span style="color: #990000"><<</span><span style="color: #FF0000">"en-US"</span><span style="color: #990000">>></span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>If no default is provided and the value is missing, an +exception is thrown.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/resp/"> + Sending a response + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/multipart/"> + Multipart requests + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/cowboy.sty b/docs/en/cowboy/2.2/guide/cowboy.sty new file mode 100644 index 00000000..d5e0d3be --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/erlang_web.asciidoc b/docs/en/cowboy/2.2/guide/erlang_web.asciidoc new file mode 100644 index 00000000..f528adc3 --- /dev/null +++ b/docs/en/cowboy/2.2/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 away from anything else in that area. 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/2.2/guide/erlang_web/index.html b/docs/en/cowboy/2.2/guide/erlang_web/index.html new file mode 100644 index 00000000..e8384489 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/erlang_web/index.html @@ -0,0 +1,353 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Erlang and the 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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Erlang and the Web</span></h1> + +<div class="paragraph"><p>Erlang is the ideal platform for writing Web applications. +Its features are a perfect match for the requirements of +modern Web applications.</p></div> +<div class="sect1"> +<h2 id="_the_web_is_concurrent">The Web is concurrent</h2> +<div class="sectionbody"> +<div class="paragraph"><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’t much.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The Web is concurrent, and Erlang is a language designed +for concurrency, so it is a perfect match.</p></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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’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 away from anything else in that area. 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></div> +<div class="paragraph"><p>Only Erlang is prepared to deal with what’s coming.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_the_web_is_soft_real_time">The Web is soft real time</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>The Web is soft real time because taking longer to perform an +operation would be seen as bad quality of service.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Erlang provides the guarantees that the soft real time Web +requires.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_the_web_is_asynchronous">The Web is asynchronous</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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’s +only natural that it’s so good at dealing with the asynchronous Web.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_the_web_is_omnipresent">The Web is omnipresent</h2> +<div class="sectionbody"> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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’s having +too many issues they just move on.</p></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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’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.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Erlang’s fault tolerance oriented design is the first piece of +what makes it the best choice for the omnipresent, always available +Web.</p></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>Fault tolerance and distribution are important today, and will be +vital in the future of the Web. Erlang is ready.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_learn_erlang">Learn Erlang</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="sect3"> +<h4 id="_the_erlanger_playbook">The Erlanger Playbook</h4> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +<div class="sect3"> +<h4 id="_programming_erlang">Programming Erlang</h4> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +<div class="sect3"> +<h4 id="_learn_you_some_erlang_for_great_good">Learn You Some Erlang for Great Good!</h4> +<div class="paragraph"><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’s pretty verbose. It comes +with a free online version and a more refined paper and +ebook version.</p></div> +</div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/modern_web/"> + The modern Web + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/introduction/"> + Introduction + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/flow_diagram.asciidoc b/docs/en/cowboy/2.2/guide/flow_diagram.asciidoc new file mode 100644 index 00000000..2d35d4d6 --- /dev/null +++ b/docs/en/cowboy/2.2/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 +which, by default, including the router and then the +execution of 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/2.2/guide/flow_diagram/index.html b/docs/en/cowboy/2.2/guide/flow_diagram/index.html new file mode 100644 index 00000000..e9790b10 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/flow_diagram/index.html @@ -0,0 +1,272 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Flow diagram</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Flow diagram</span></h1> + +<div class="paragraph"><p>Cowboy is a lightweight HTTP server with support for HTTP/1.1, +HTTP/2 and Websocket.</p></div> +<div class="paragraph"><p>It is built on top of Ranch. Please see the Ranch guide for more +information about how the network connections are handled.</p></div> +<div class="sect1"> +<h2 id="_overview">Overview</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../http_req_resp.png" alt="HTTP request/response flowchart" /> +</div> +</div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>In HTTP/1.1 all requests come sequentially. In HTTP/2 +the requests may arrive and be processed concurrently.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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 +which, by default, including the router and then the +execution of handlers. Like stream handlers, middlewares +may also be customized.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_protocol_specific_headers">Protocol-specific headers</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_number_of_processes_per_connection">Number of processes per connection</h2> +<div class="sectionbody"> +<div class="paragraph"><p>By default, Cowboy will use one process per connection, +plus one process per set of request/response (called a +stream, internally).</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_date_header">Date header</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_binaries">Binaries</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy makes extensive use of binaries.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/getting_started/"> + Getting started + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/listeners/"> + Listeners + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/getting_started.asciidoc b/docs/en/cowboy/2.2/guide/getting_started.asciidoc new file mode 100644 index 00000000..3f145bb8 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/getting_started.asciidoc @@ -0,0 +1,147 @@ +[[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 +... +([email protected])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: + +[source,makefile] +---- +PROJECT = hello_erlang + +DEPS = cowboy +dep_cowboy_commit = 2.1.0 + +DEP_PLUGINS = cowboy + +include erlang.mk +---- + +We also tell the build system to load the plugins Cowboy provides. +These include predefined templates that we will use soon. + +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/2.2/guide/getting_started/index.html b/docs/en/cowboy/2.2/guide/getting_started/index.html new file mode 100644 index 00000000..5aaedfee --- /dev/null +++ b/docs/en/cowboy/2.2/guide/getting_started/index.html @@ -0,0 +1,320 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Getting started</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Getting started</span></h1> + +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_prerequisites">Prerequisites</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_bootstrap">Bootstrap</h2> +<div class="sectionbody"> +<div class="paragraph"><p>First, let’s create the directory for our application.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +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> +<div class="paragraph"><p>Then we need to download Erlang.mk. Either use the following +command or download it manually.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>$ wget https<span style="color: #990000">:</span>//erlang<span style="color: #990000">.</span>mk/erlang<span style="color: #990000">.</span>mk</tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>$ make -f erlang<span style="color: #990000">.</span>mk bootstrap bootstrap-rel</tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>$ make run +<span style="color: #990000">...</span> +<span style="color: #990000">(</span>hello_erlang@<span style="color: #993399">127.0</span><span style="color: #990000">.</span><span style="color: #993399">0.1</span><span style="color: #990000">)</span><span style="color: #993399">1</span><span style="color: #990000">></span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_cowboy_setup">Cowboy setup</h2> +<div class="sectionbody"> +<div class="paragraph"><p>We will modify the <em>Makefile</em> to tell the build system it needs to +fetch and compile Cowboy:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PROJECT =</span> hello_erlang + +<span style="color: #009900">DEPS =</span> cowboy +<span style="color: #009900">dep_cowboy_commit =</span> 2.1.0 + +<span style="color: #009900">DEP_PLUGINS =</span> cowboy + +include erlang.mk</tt></pre></div></div> +<div class="paragraph"><p>We also tell the build system to load the plugins Cowboy provides. +These include predefined templates that we will use soon.</p></div> +<div class="paragraph"><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’t do anything by default. We still need to tell Cowboy to +listen for connections.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_listening_for_connections">Listening for connections</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">start</span></span>(<span style="color: #009900">_Type</span>, <span style="color: #009900">_Args</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + {<span style="color: #FF6600">'_'</span>, [{<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">hello_handler</span>, []}]} + ]), + {<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_clear</span></span>(<span style="color: #FF6600">my_http_listener</span>, + [{<span style="color: #FF6600">port</span>, <span style="color: #993399">8080</span>}], + #{<span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>}} + ), + <span style="font-weight: bold"><span style="color: #000000">hello_erlang_sup:start_link</span></span>()<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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’t exist yet.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_handling_requests">Handling requests</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy features different kinds of handlers, including REST +and Websocket handlers. For this tutorial we will use a plain +HTTP handler.</p></div> +<div class="paragraph"><p>Generate a handler from a template:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>$ make new <span style="color: #009900">t</span><span style="color: #990000">=</span>cowboy<span style="color: #990000">.</span>http <span style="color: #009900">n</span><span style="color: #990000">=</span>hello_handler</tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, + #{<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span>}, + <span style="color: #990000"><<</span><span style="color: #FF0000">"Hello Erlang!"</span><span style="color: #990000">>></span>, + <span style="color: #009900">Req0</span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/introduction/"> + Introduction + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/flow_diagram/"> + Flow diagram + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/handlers.asciidoc b/docs/en/cowboy/2.2/guide/handlers.asciidoc new file mode 100644 index 00000000..fe6f4623 --- /dev/null +++ b/docs/en/cowboy/2.2/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. diff --git a/docs/en/cowboy/2.2/guide/handlers/index.html b/docs/en/cowboy/2.2/guide/handlers/index.html new file mode 100644 index 00000000..cdfbf6dd --- /dev/null +++ b/docs/en/cowboy/2.2/guide/handlers/index.html @@ -0,0 +1,250 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Handlers</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=1" 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 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href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Handlers</span></h1> + +<div class="paragraph"><p>Handlers are Erlang modules that handle HTTP requests.</p></div> +<div class="sect1"> +<h2 id="_plain_http_handlers">Plain HTTP handlers</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>A handler that does nothing would look like this:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>We need to use the Req object to reply.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span> + }, <span style="color: #990000"><<</span><span style="color: #FF0000">"Hello World!"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Cowboy will immediately send a response when <code>cowboy:reply/4</code> +is called.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_other_handlers">Other handlers</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_cleaning_up">Cleaning up</h2> +<div class="sectionbody"> +<div class="paragraph"><p>All handler types provide the optional <code>terminate/3</code> callback.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">terminate</span></span>(<span style="color: #009900">_Reason</span>, <span style="color: #009900">_Req</span>, <span style="color: #009900">_State</span>) <span style="color: #990000">-></span> + <span style="color: #FF6600">ok</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy does not reuse processes for different requests. The +process will terminate soon after this call returns.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/constraints/"> + Constraints + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/loop_handlers/"> + Loop handlers + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</div> +</div> +</div> +</div> + + <footer> + <div 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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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="sect1"> +<h2 id="_rationale">Rationale</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="modern_web/">The modern Web</a> +</p> +</li> +<li> +<p> +<a href="erlang_web/">Erlang and the Web</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_introduction">Introduction</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="introduction/">Introduction</a> +</p> +</li> +<li> +<p> +<a href="getting_started/">Getting started</a> +</p> +</li> +<li> +<p> +<a href="flow_diagram/">Flow diagram</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_configuration">Configuration</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="listeners/">Listeners</a> +</p> +</li> +<li> +<p> +<a href="routing/">Routing</a> +</p> +</li> +<li> +<p> +<a href="constraints/">Constraints</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_handlers">Handlers</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="handlers/">Handlers</a> +</p> +</li> +<li> +<p> +<a href="loop_handlers/">Loop handlers</a> +</p> +</li> +<li> +<p> +<a href="static_files/">Static files</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_request_and_response">Request and response</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="req/">Request details</a> +</p> +</li> +<li> +<p> +<a href="req_body/">Reading the request body</a> +</p> +</li> +<li> +<p> +<a href="resp/">Sending a response</a> +</p> +</li> +<li> +<p> +<a href="cookies/">Using cookies</a> +</p> +</li> +<li> +<p> +<a href="multipart/">Multipart</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_rest">REST</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="rest_principles/">REST principles</a> +</p> +</li> +<li> +<p> +<a href="rest_handlers/">Handling REST requests</a> +</p> +</li> +<li> +<p> +<a href="rest_flowcharts/">REST flowcharts</a> +</p> +</li> +<li> +<p> +<a href="resource_design/">Designing a resource handler</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_websocket">Websocket</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="ws_protocol/">The Websocket protocol</a> +</p> +</li> +<li> +<p> +<a href="ws_handlers/">Websocket handlers</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_advanced">Advanced</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="streams/">Streams</a> +</p> +</li> +<li> +<p> +<a href="middlewares/">Middlewares</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_additional_information">Additional information</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="migrating_from_2.1/">Migrating from Cowboy 2.1 to 2.2</a> +</p> +</li> +<li> +<p> +<a href="migrating_from_2.0/">Migrating from Cowboy 2.0 to 2.1</a> +</p> +</li> +<li> +<p> +<a href="migrating_from_1.0/">Migrating from Cowboy 1.0 to 2.0</a> +</p> +</li> +<li> +<p> +<a href="specs/">HTTP and other specifications</a> +</p> +</li> +</ul></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/introduction.asciidoc b/docs/en/cowboy/2.2/guide/introduction.asciidoc new file mode 100644 index 00000000..1f9b52e4 --- /dev/null +++ b/docs/en/cowboy/2.2/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 19.0 and newer. + +=== License + +Cowboy uses the ISC License. + +---- +Copyright (c) 2011-2017, 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 +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/2.2/guide/introduction/index.html b/docs/en/cowboy/2.2/guide/introduction/index.html new file mode 100644 index 00000000..e5eb5e2c --- /dev/null +++ b/docs/en/cowboy/2.2/guide/introduction/index.html @@ -0,0 +1,238 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="paragraph"><p>Cowboy is a small, fast and modern HTTP server for Erlang/OTP.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_prerequisites">Prerequisites</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Beginner Erlang knowledge is recommended for reading this guide.</p></div> +<div class="paragraph"><p>Knowledge of the HTTP protocol is recommended but not required, as it +will be detailed throughout the guide.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_supported_platforms">Supported platforms</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy is tested and supported on Linux, FreeBSD, Windows and OSX.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy is developed for Erlang/OTP 19.0 and newer.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_license">License</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy uses the ISC License.</p></div> +<div class="listingblock"> +<div class="content"> +<pre><code>Copyright (c) 2011-2017, 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 +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.</code></pre> +</div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_versioning">Versioning</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy uses <a href="http://semver.org/">Semantic Versioning 2.0.0</a>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_conventions">Conventions</h2> +<div class="sectionbody"> +<div class="paragraph"><p>In the HTTP protocol, the method name is case sensitive. All standard +method names are uppercase.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The same applies to any other case insensitive value.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/erlang_web/"> + Erlang and the Web + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/getting_started/"> + Getting started + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/listeners.asciidoc b/docs/en/cowboy/2.2/guide/listeners.asciidoc new file mode 100644 index 00000000..10ac4aad --- /dev/null +++ b/docs/en/cowboy/2.2/guide/listeners.asciidoc @@ -0,0 +1,115 @@ +[[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/1.3/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 setup a custom listener. + +[source,erlang] +---- +start(_Type, _Args) -> + Dispatch = cowboy_router:compile([ + {'_', [{"/", hello_handler, []}]} + ]), + {ok, _} = cowboy:start_tls(my_http_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. + +=== 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/2.2/guide/listeners/index.html b/docs/en/cowboy/2.2/guide/listeners/index.html new file mode 100644 index 00000000..68a2097f --- /dev/null +++ b/docs/en/cowboy/2.2/guide/listeners/index.html @@ -0,0 +1,268 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Listeners</span></h1> + +<div class="paragraph"><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></div> +<div class="paragraph"><p>This chapter is specific to Cowboy. Please refer to the +<a href="https://ninenines.eu/docs/en/ranch/1.3/guide/listeners/">Ranch User Guide</a> +for more information about listeners.</p></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_clear_tcp_listener">Clear TCP listener</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following snippet starts listening for connections +on port 8080:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">start</span></span>(<span style="color: #009900">_Type</span>, <span style="color: #009900">_Args</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + {<span style="color: #FF6600">'_'</span>, [{<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">hello_handler</span>, []}]} + ]), + {<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_clear</span></span>(<span style="color: #FF6600">my_http_listener</span>, + [{<span style="color: #FF6600">port</span>, <span style="color: #993399">8080</span>}], + #{<span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>}} + ), + <span style="font-weight: bold"><span style="color: #000000">hello_erlang_sup:start_link</span></span>()<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The <a href="../getting_started">Getting Started</a> chapter uses a +clear TCP listener.</p></div> +<div class="paragraph"><p>Clients connecting to Cowboy on the clear listener port are +expected to use either HTTP/1.1 or HTTP/2.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Compatibility with HTTP/1.0 is provided by Cowboy’s HTTP/1.1 +implementation.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_secure_tls_listener">Secure TLS listener</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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 setup a custom listener.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">start</span></span>(<span style="color: #009900">_Type</span>, <span style="color: #009900">_Args</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + {<span style="color: #FF6600">'_'</span>, [{<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">hello_handler</span>, []}]} + ]), + {<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_tls</span></span>(<span style="color: #FF6600">my_http_listener</span>, + [ + {<span style="color: #FF6600">port</span>, <span style="color: #993399">8443</span>}, + {<span style="color: #FF6600">certfile</span>, <span style="color: #FF0000">"/path/to/certfile"</span>}, + {<span style="color: #FF6600">keyfile</span>, <span style="color: #FF0000">"/path/to/keyfile"</span>} + ], + #{<span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>}} + ), + <span style="font-weight: bold"><span style="color: #000000">hello_erlang_sup:start_link</span></span>()<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Compatibility with HTTP/1.0 is provided by Cowboy’s HTTP/1.1 +implementation.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_protocol_configuration">Protocol configuration</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy doesn’t separate the configuration for HTTP/1.1 and +HTTP/2. Everything goes into the same map. Many options are +shared.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/flow_diagram/"> + Flow diagram + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/routing/"> + Routing + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/loop_handlers.asciidoc b/docs/en/cowboy/2.2/guide/loop_handlers.asciidoc new file mode 100644 index 00000000..21bf8424 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/loop_handlers.asciidoc @@ -0,0 +1,128 @@ +[[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. + +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 +a timeout value and/or the atom `hibernate` to make the +process enter hibernation until a message is received. + +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}. +---- + +=== 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 + +It is recommended that you set the connection header to +`close` when replying, as this process may be reused for +a subsequent request. + +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. diff --git a/docs/en/cowboy/2.2/guide/loop_handlers/index.html b/docs/en/cowboy/2.2/guide/loop_handlers/index.html new file mode 100644 index 00000000..db5c4ac3 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/loop_handlers/index.html @@ -0,0 +1,290 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Loop handlers</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Loop handlers</span></h1> + +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_initialization">Initialization</h2> +<div class="sectionbody"> +<div class="paragraph"><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 +a timeout value and/or the atom <code>hibernate</code> to make the +process enter hibernation until a message is received.</p></div> +<div class="paragraph"><p>This snippet enables the loop handler:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_loop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>This also makes the process hibernate:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_loop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>}<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_receive_loop">Receive loop</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Once initialized, Cowboy will wait for messages to arrive +in the process' mailbox. When a message arrives, Cowboy +calls the <code>info/3</code> function with the message, the Req object +and the handler’s state.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">info</span></span>({<span style="color: #FF6600">reply</span>, <span style="color: #009900">Body</span>}, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{}, <span style="color: #009900">Body</span>, <span style="color: #009900">Req</span>), + {<span style="color: #FF6600">stop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}; +<span style="font-weight: bold"><span style="color: #000000">info</span></span>(<span style="color: #009900">_Msg</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Do note that the <code>reply</code> tuple here may be any message +and is simply an example.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The callback may also choose to do nothing at all and just +skip the message received.</p></div> +<div class="paragraph"><p>If a reply is sent, then the <code>stop</code> tuple should be returned. +This will instruct Cowboy to end the request.</p></div> +<div class="paragraph"><p>Otherwise an <code>ok</code> tuple should be returned.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_streaming_loop">Streaming loop</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Req2</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_reply</span></span>(<span style="color: #993399">200</span>, <span style="color: #009900">Req</span>), + {<span style="color: #FF6600">cowboy_loop</span>, <span style="color: #009900">Req2</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span> + +<span style="font-weight: bold"><span style="color: #000000">info</span></span>(<span style="color: #FF6600">eof</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">stop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}; +<span style="font-weight: bold"><span style="color: #000000">info</span></span>({<span style="color: #FF6600">event</span>, <span style="color: #009900">Data</span>}, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #009900">Data</span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}; +<span style="font-weight: bold"><span style="color: #000000">info</span></span>(<span style="color: #009900">_Msg</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_cleaning_up">Cleaning up</h2> +<div class="sectionbody"> +<div class="paragraph"><p>It is recommended that you set the connection header to +<code>close</code> when replying, as this process may be reused for +a subsequent request.</p></div> +<div class="paragraph"><p>Please refer to the <a href="../handlers">Handlers chapter</a> +for general instructions about cleaning up.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_hibernate">Hibernate</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/handlers/"> + Handlers + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/static_files/"> + Static files + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/middlewares.asciidoc b/docs/en/cowboy/2.2/guide/middlewares.asciidoc new file mode 100644 index 00000000..e6be30dd --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/middlewares/index.html b/docs/en/cowboy/2.2/guide/middlewares/index.html new file mode 100644 index 00000000..f0c604e5 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/middlewares/index.html @@ -0,0 +1,251 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Middlewares</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Middlewares</span></h1> + +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy will execute all middlewares in the given order, unless one +of them decides to stop processing.</p></div> +<div class="sect1"> +<h2 id="_usage">Usage</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Middlewares only need to implement a single callback: <code>execute/2</code>. +It is defined in the <code>cowboy_middleware</code> behavior.</p></div> +<div class="paragraph"><p>This callback has two arguments. The first is the <code>Req</code> object. +The second is the environment.</p></div> +<div class="paragraph"><p>Middlewares can return one of three different values:</p></div> +<div class="ulist"><ul> +<li> +<p> +<code>{ok, Req, Env}</code> to continue the request processing +</p> +</li> +<li> +<p> +<code>{suspend, Module, Function, Args}</code> to hibernate +</p> +</li> +<li> +<p> +<code>{stop, Req}</code> to stop processing and move on to the next request +</p> +</li> +</ul></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_configuration">Configuration</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Two values in the environment are reserved:</p></div> +<div class="ulist"><ul> +<li> +<p> +<code>listener</code> contains the name of the listener +</p> +</li> +<li> +<p> +<code>result</code> contains the result of the processing +</p> +</li> +</ul></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The middlewares that come with Cowboy may define or require other +environment values to perform.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_routing_middleware">Routing middleware</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_handler_middleware">Handler middleware</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/streams/"> + Streams + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/migrating_from_2.1/"> + Migrating from Cowboy 2.1 to 2.2 + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/migrating_from_1.0.asciidoc b/docs/en/cowboy/2.2/guide/migrating_from_1.0.asciidoc new file mode 100644 index 00000000..4f4ea5bf --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/migrating_from_1.0/index.html b/docs/en/cowboy/2.2/guide/migrating_from_1.0/index.html new file mode 100644 index 00000000..27f06b5a --- /dev/null +++ b/docs/en/cowboy/2.2/guide/migrating_from_1.0/index.html @@ -0,0 +1,547 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Migrating from Cowboy 1.0 to 2.0</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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 1.0 to 2.0</span></h1> + +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_compatibility">Compatibility</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy 2.0 now comes with Erlang.mk templates.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_features_added">Features added</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +The HTTP/2 protocol is now supported. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +The <code>cowboy_stream_h</code> stream handler has been added. + It provides most of Cowboy’s default behavior. +</p> +</li> +<li> +<p> +The <code>cowboy_compress_h</code> 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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Websocket permessage-deflate compression is now supported + via the <code>compress</code> option. +</p> +</li> +<li> +<p> +Static file handlers will now correctly find files found + in <em>.ez</em> archives. +</p> +</li> +<li> +<p> +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. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_features_removed">Features removed</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +SPDY support has been removed. Use HTTP/2 instead. +</p> +</li> +<li> +<p> +Hooks have been removed. Use <a href="../streams">stream handlers</a> instead. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Sub protocols still exist, but their interface has largely changed + and they are no longer documented for the time being. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changed_behaviors">Changed behaviors</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +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>. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Middlewares can no longer return an <code>error</code> tuple. They have + to send the response and return a <code>stop</code> tuple instead. +</p> +</li> +<li> +<p> +The <code>known_content_type</code> REST handler callback has been removed + as it was found unnecessary. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Websocket handlers can now send frames directly from + <code>websocket_init/1</code>. The frames will be sent immediately + after the handshake. +</p> +</li> +<li> +<p> +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). +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Websocket handlers have their timeout default changed + from infinity to 60 seconds. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_new_functions">New functions</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +The <code>cowboy_req:scheme/1</code> function has been added. +</p> +</li> +<li> +<p> +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>. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +The function <code>cowboy_req:set_resp_cookie/3</code> has been added to + complement <code>cowboy_req:set_resp_cookie/4</code>. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +The function <code>cowboy_req:set_resp_headers/2</code> has been added. It + allows setting many response headers at once. +</p> +</li> +<li> +<p> +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). +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changed_functions">Changed functions</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +The <code>cowboy:start_http/4</code> function was renamed to <code>cowboy:start_clear/3</code>. +</p> +</li> +<li> +<p> +The <code>cowboy:start_https/4</code> function was renamed to <code>cowboy:start_tls/3</code>. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_removed_functions">Removed functions</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +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>. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_other_changes">Other changes</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +The correct percent-decoding algorithm is now used for path elements + during routing. It will no longer decode <code>+</code> characters. +</p> +</li> +<li> +<p> +The router will now properly handle path segments <code>.</code> and <code>..</code>. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Etag comparison in REST handlers has been fixed. Some requests may + now fail when they succeeded in the past. +</p> +</li> +<li> +<p> +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’t create + any issue. The new behavior follows the current RFCs more closely. +</p> +</li> +<li> +<p> +The static file handler has been improved to handle more special + characters on systems that accept them. +</p> +</li> +</ul></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/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/2.2/guide/specs/"> + HTTP and other specifications + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/migrating_from_2.0.asciidoc b/docs/en/cowboy/2.2/guide/migrating_from_2.0.asciidoc new file mode 100644 index 00000000..c76430c2 --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/migrating_from_2.0/index.html b/docs/en/cowboy/2.2/guide/migrating_from_2.0/index.html new file mode 100644 index 00000000..4326200a --- /dev/null +++ b/docs/en/cowboy/2.2/guide/migrating_from_2.0/index.html @@ -0,0 +1,347 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_features_added">Features added</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +It is now possible to obtain the client TLS certificate + and the local IP/port for the connection from the Req object. +</p> +</li> +<li> +<p> +Informational responses (1XX responses) can now be sent. + They must be sent before initiating the final response. +</p> +</li> +<li> +<p> +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. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_experimental_features_added">Experimental features added</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="ulist"><ul> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changed_behaviors">Changed behaviors</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +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. +</p> +</li> +<li> +<p> +REST callbacks that do not allow <code>stop</code> as a return value + are now explicitly listed in the documentation. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_new_functions">New functions</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +The function <code>cowboy_req:sock/1</code> returns the IP/port + of the local socket. +</p> +</li> +<li> +<p> +The function <code>cowboy_req:cert/1</code> returns the client + TLS certificate or <code>undefined</code> if it isn’t available. +</p> +</li> +<li> +<p> +The function <code>cowboy_req:inform/2,3</code> sends an + informational response. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_bugs_fixed">Bugs fixed</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +Ensure HTTP/2 connections are not closed prematurely + when the user code does not read the request body. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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’t apply when + doing upgrades to HTTP/2 as those occur before the + stream is initialized. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +</ul></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/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/2.2/guide/migrating_from_1.0/"> + Migrating from Cowboy 1.0 to 2.0 + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/migrating_from_2.1.asciidoc b/docs/en/cowboy/2.2/guide/migrating_from_2.1.asciidoc new file mode 100644 index 00000000..3c0681ff --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/migrating_from_2.1/index.html b/docs/en/cowboy/2.2/guide/migrating_from_2.1/index.html new file mode 100644 index 00000000..79bcc13a --- /dev/null +++ b/docs/en/cowboy/2.2/guide/migrating_from_2.1/index.html @@ -0,0 +1,362 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_features_added">Features added</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +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). +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_new_functions">New functions</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +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. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_bugs_fixed">Bugs fixed</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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). +</p> +</li> +<li> +<p> +When the HTTP/2 SETTINGS_INITIAL_WINDOW_SIZE value changes, + Cowboy now properly updates the flow control windows. +</p> +</li> +<li> +<p> +HTTP/2 could mistakenly log stray messages that actually were + expected. This is no longer the case. +</p> +</li> +<li> +<p> +We no longer send a GOAWAY frame when the HTTP/2 preface is invalid. +</p> +</li> +<li> +<p> +Some values in the Req object of pushed requests were in the + wrong type. They are now the expected binary instead of iolist. +</p> +</li> +<li> +<p> +A response body was sometimes sent in response to HEAD requests + when using HTTP/2. The body is now ignored. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Absolute URIs with a userinfo component, or without an authority + component, are now properly rejected for HTTP/1.0 and HTTP/1.1. +</p> +</li> +<li> +<p> +Whitespace is no longer allowed in header lines before the colon. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +A 400 response is now returned when the transfer-encoding + header is invalid or contains any transfer-coding other + than chunked. +</p> +</li> +<li> +<p> +Invalid chunk sizes are now rejected immediately. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +The final chunk was mistakenly sent in responses to HEAD + requests. This is now corrected. +</p> +</li> +<li> +<p> +<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. +</p> +</li> +<li> +<p> +204 responses no longer include a content-length header. +</p> +</li> +<li> +<p> +A packet could be lost when switching to Websocket or any + other protocol via the <code>switch_protocol</code> command. This is + now fixed. +</p> +</li> +<li> +<p> +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. +</p> +</li> +<li> +<p> +Both experimental stream handlers <code>cowboy_metrics_h</code> and + <code>cowboy_tracer_h</code> received a number of fixes and improvements. +</p> +</li> +</ul></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/middlewares/"> + Middlewares + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/migrating_from_2.0/"> + Migrating from Cowboy 2.0 to 2.1 + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/modern_web.asciidoc b/docs/en/cowboy/2.2/guide/modern_web.asciidoc new file mode 100644 index 00000000..48525732 --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/modern_web/index.html b/docs/en/cowboy/2.2/guide/modern_web/index.html new file mode 100644 index 00000000..a44048b3 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/modern_web/index.html @@ -0,0 +1,270 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>The modern Web</span></h1> + +<div class="paragraph"><p>Cowboy is a server for the modern Web. This chapter explains +what it means and details all the standards involved.</p></div> +<div class="paragraph"><p>Cowboy supports all the standards listed in this document.</p></div> +<div class="sect1"> +<h2 id="_http_2">HTTP/2</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy provides transparent support for HTTP/2. Clients +that know it can use it; others fall back to HTTP/1.1 +automatically.</p></div> +<div class="paragraph"><p>HTTP/2 is compatible with the HTTP/1.1 semantics.</p></div> +<div class="paragraph"><p>HTTP/2 is defined by RFC 7540 and RFC 7541.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_http_1_1">HTTP/1.1</h2> +<div class="sectionbody"> +<div class="paragraph"><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’s also sometimes difficult +to detect that a client disconnected.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_websocket">Websocket</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy provides an interface known as <a href="../ws_handlers">Websocket handlers</a> +that gives complete control over a Websocket connection.</p></div> +<div class="paragraph"><p>The Websocket protocol is defined by RFC 6455.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_long_lived_requests">Long-lived requests</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Long-polling is essentially a hack, but it is widely used +to overcome limitations on older clients and servers.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_rest">REST</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/erlang_web/"> + Erlang and the Web + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/multipart.asciidoc b/docs/en/cowboy/2.2/guide/multipart.asciidoc new file mode 100644 index 00000000..0825244c --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/multipart/index.html b/docs/en/cowboy/2.2/guide/multipart/index.html new file mode 100644 index 00000000..c1b3b8c2 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/multipart/index.html @@ -0,0 +1,328 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="paragraph"><p>Multipart originates from MIME, an Internet standard that +extends the format of emails.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_form_data">Form-data</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>That’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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_checking_for_multipart_messages">Checking for multipart messages</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The content-type header indicates the presence of +a multipart message:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #990000"><<</span><span style="color: #FF0000">"multipart"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"form-data"</span><span style="color: #990000">>></span>, <span style="color: #990000">_</span>} + <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_reading_a_multipart_message">Reading a multipart message</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy provides two sets of functions for reading +request bodies as multipart messages.</p></div> +<div class="paragraph"><p>The <code>cowboy_req:read_part/1,2</code> functions return the +next part’s headers, if any.</p></div> +<div class="paragraph"><p>The <code>cowboy_req:read_part_body/1,2</code> functions return +the current part’s body. For large bodies you may +need to call the function multiple times.</p></div> +<div class="paragraph"><p>To read a multipart message you need to iterate over +all its parts:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">multipart</span></span>(<span style="color: #009900">Req0</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">_Headers</span>, <span style="color: #009900">Req1</span>} <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">_Body</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part_body</span></span>(<span style="color: #009900">Req1</span>), + <span style="font-weight: bold"><span style="color: #000000">multipart</span></span>(<span style="color: #009900">Req</span>); + {<span style="color: #FF6600">done</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following snippet will use this function and +use different strategies depending on whether the +part is a file:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">multipart</span></span>(<span style="color: #009900">Req0</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req1</span>} <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cow_multipart:form_data</span></span>(<span style="color: #009900">Headers</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">data</span>, <span style="color: #009900">_FieldName</span>} <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">_Body</span>, <span style="color: #009900">Req2</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part_body</span></span>(<span style="color: #009900">Req1</span>), + <span style="color: #009900">Req2</span>; + {<span style="color: #FF6600">file</span>, <span style="color: #009900">_FieldName</span>, <span style="color: #009900">_Filename</span>, <span style="color: #009900">_CType</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">stream_file</span></span>(<span style="color: #009900">Req1</span>) + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>, + <span style="font-weight: bold"><span style="color: #000000">multipart</span></span>(<span style="color: #009900">Req</span>); + {<span style="color: #FF6600">done</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span> + +<span style="font-weight: bold"><span style="color: #000000">stream_file</span></span>(<span style="color: #009900">Req0</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part_body</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">_LastBodyChunk</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="color: #009900">Req</span>; + {<span style="color: #FF6600">more</span>, <span style="color: #009900">_BodyChunk</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">stream_file</span></span>(<span style="color: #009900">Req</span>) + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To change the defaults for part headers:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part</span></span>(<span style="color: #009900">Req</span>, #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">128000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>And for part bodies:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part_body</span></span>(<span style="color: #009900">Req</span>, #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">1000000</span>, <span style="color: #0000FF">period</span> <span style="color: #990000">=></span> <span style="color: #993399">7000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_skipping_unwanted_parts">Skipping unwanted parts</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Part bodies do not have to be read. Cowboy will automatically +skip it when you request the next part’s body.</p></div> +<div class="paragraph"><p>The following snippet reads all part headers and skips +all bodies:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">multipart</span></span>(<span style="color: #009900">Req0</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">_Headers</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">multipart</span></span>(<span style="color: #009900">Req</span>); + {<span style="color: #FF6600">done</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>You do not have to read all parts either. You can stop +reading as soon as you find the data you need.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/cookies/"> + Using cookies + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_principles/"> + REST principles + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/req.asciidoc b/docs/en/cowboy/2.2/guide/req.asciidoc new file mode 100644 index 00000000..b879fa3d --- /dev/null +++ b/docs/en/cowboy/2.2/guide/req.asciidoc @@ -0,0 +1,366 @@ +[[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`; +and the connection `peer` address and port. + +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, while allowed, is not recommended +unless strictly necessary. If adding new fields, make sure +to namespace the field names so that no conflict can occur +with future Cowboy updates or third party projects. + +// @todo There are currently no tests for direct access. + +=== 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[]`. + +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 passed through. + +=== 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/2.2/guide/req/index.html b/docs/en/cowboy/2.2/guide/req/index.html new file mode 100644 index 00000000..01a95f45 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/req/index.html @@ -0,0 +1,566 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: The Req object</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>The Req object</span></h1> + +<div class="paragraph"><p>The Req object is a variable used for obtaining information +about a request, read its body or send a response.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_direct_access">Direct access</h2> +<div class="sectionbody"> +<div class="paragraph"><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>; +and the connection <code>peer</code> address and port.</p></div> +<div class="paragraph"><p>Note that the <code>version</code> field can be used to determine +whether a connection is using HTTP/2.</p></div> +<div class="paragraph"><p>To access a field, you can simply match in the function +head. The following example sends a simple "Hello world!" +response when the <code>method</code> is GET, and a 405 error +otherwise.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req0</span><span style="color: #990000">=</span>#{<span style="color: #FF6600">method</span> <span style="color: #990000">:=</span> <span style="color: #990000"><<</span><span style="color: #FF0000">"GET"</span><span style="color: #990000">>></span>}, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span> + }, <span style="color: #990000"><<</span><span style="color: #FF0000">"Hello world!"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}; +<span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">405</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"allow"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"GET"</span><span style="color: #990000">>></span> + }, <span style="color: #009900">Req0</span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Any other field is internal and should not be accessed. +They may change in future releases, including maintenance +releases, without notice.</p></div> +<div class="paragraph"><p>Modifying the Req object, while allowed, is not recommended +unless strictly necessary. If adding new fields, make sure +to namespace the field names so that no conflict can occur +with future Cowboy updates or third party projects.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_introduction_to_the_cowboy_req_interface">Introduction to the cowboy_req interface</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_request_method">Request method</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The request method can be retrieved directly:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">method</span> <span style="color: #990000">:=</span> <span style="color: #009900">Method</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Or using a function:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Method</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:method</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The method is a case sensitive binary string. Standard +methods include GET, HEAD, OPTIONS, PATCH, POST, PUT +or DELETE.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_http_version">HTTP version</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The HTTP version is informational. It does not indicate that +the client implements the protocol well or fully.</p></div> +<div class="paragraph"><p>There is typically no need to change behavior based on the +HTTP version: Cowboy already does it for you.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The HTTP version can be retrieved directly:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">version</span> <span style="color: #990000">:=</span> <span style="color: #009900">Version</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Or using a function:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Version</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:version</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Cowboy defines the <code>'HTTP/1.0'</code>, <code>'HTTP/1.1'</code> and <code>'HTTP/2'</code> +versions. Custom protocols can define their own values as +atoms.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_effective_request_uri">Effective request URI</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The scheme, host, port, path and query string components +of the effective request URI can all be retrieved directly:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{ + <span style="color: #FF6600">scheme</span> <span style="color: #990000">:=</span> <span style="color: #009900">Scheme</span>, + <span style="color: #FF6600">host</span> <span style="color: #990000">:=</span> <span style="color: #009900">Host</span>, + <span style="color: #FF6600">port</span> <span style="color: #990000">:=</span> <span style="color: #009900">Port</span>, + <span style="color: #FF6600">path</span> <span style="color: #990000">:=</span> <span style="color: #009900">Path</span>, + <span style="color: #FF6600">qs</span> <span style="color: #990000">:=</span> <span style="color: #009900">Qs</span> +} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Or using the related functions:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Scheme</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:scheme</span></span>(<span style="color: #009900">Req</span>), +<span style="color: #009900">Host</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:host</span></span>(<span style="color: #009900">Req</span>), +<span style="color: #009900">Port</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:port</span></span>(<span style="color: #009900">Req</span>), +<span style="color: #009900">Path</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:path</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span> +<span style="color: #009900">Qs</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:qs</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy defines only the <code><<"http">></code> and <code><<"https">></code> schemes. +They are chosen so that the scheme will only be <code><<"https">></code> +for requests on secure HTTP/1.1 or HTTP/2 connections.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% </span></span><span style="text-decoration: underline"><span style="color: #0000FF">scheme://host</span></span><span style="font-style: italic"><span style="color: #9A1900">[:port]/path[?qs]</span></span> +<span style="color: #009900">URI</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% /path[?qs]</span></span> +<span style="color: #009900">URI</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The protocol relative form:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% //host[:port]/path[?qs]</span></span> +<span style="color: #009900">URI</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The absolute URI without a query string:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">URI</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">qs</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>A different host:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">URI</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"example.org"</span><span style="color: #990000">>></span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>And any other combination.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_bindings">Bindings</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy provides functions to retrieve one or all bindings.</p></div> +<div class="paragraph"><p>To retrieve a single value:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Value</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:binding</span></span>(<span style="color: #FF6600">userid</span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Value</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:binding</span></span>(<span style="color: #FF6600">userid</span>, <span style="color: #009900">Req</span>, <span style="color: #993399">42</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>To retrieve everything that was bound:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Bindings</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:bindings</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>They are returned as a map, with keys being atoms.</p></div> +<div class="paragraph"><p>The Cowboy router also allows you to capture many host +or path segments at once using the <code>...</code> qualifier.</p></div> +<div class="paragraph"><p>To retrieve the segments captured from the host name:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">HostInfo</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:host_info</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>And the path segments:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathInfo</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:path_info</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Cowboy will return <code>undefined</code> if <code>...</code> was not used +in the route.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_query_parameters">Query parameters</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy provides two functions to access query parameters. +You can use the first to get the entire list of parameters.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">QsVals</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_qs</span></span>(<span style="color: #009900">Req</span>), +{<span style="color: #990000">_</span>, <span style="color: #009900">Lang</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">lists:keyfind</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"lang"</span><span style="color: #990000">>></span>, <span style="color: #993399">1</span>, <span style="color: #009900">QsVals</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>When a query string is <code>key=1&key=2</code>, the list returned will +contain two parameters of name <code>key</code>.</p></div> +<div class="paragraph"><p>The same is true when trying to use the PHP-style suffix <code>[]</code>. +When a query string is <code>key[]=1&key[]=2</code>, the list returned will +contain two parameters of name <code>key[]</code>.</p></div> +<div class="paragraph"><p>When a query string is simply <code>key</code>, Cowboy will return the +list <code>[{<<"key">>, true}]</code>, using <code>true</code> to indicate that the +parameter <code>key</code> was defined, but with no value.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">id</span> <span style="color: #990000">:=</span> <span style="color: #009900">ID</span>, <span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_qs</span></span>([<span style="color: #FF6600">id</span>, <span style="color: #FF6600">lang</span>], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">QsMap</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_qs</span></span>([{<span style="color: #FF6600">id</span>, <span style="color: #FF6600">int</span>}, {<span style="color: #FF6600">lang</span>, <span style="color: #FF6600">nonempty</span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_qs</span></span>([{<span style="color: #FF6600">lang</span>, [], <span style="color: #990000"><<</span><span style="color: #FF0000">"en-US"</span><span style="color: #990000">>></span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>If no default is provided and the value is missing, the +query string is deemed invalid and the process will crash.</p></div> +<div class="paragraph"><p>When the query string is <code>key=1&key=2</code>, the value for <code>key</code> +will be the list <code>[1, 2]</code>. Parameter names do not need to +include the PHP-style suffix. Constraints may be used to +ensure that only one value was passed through.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_headers">Headers</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Header values can be retrieved either as a binary string +or parsed into a more meaningful representation.</p></div> +<div class="paragraph"><p>The get the raw value:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">HeaderVal</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>When the header is missing from the request, <code>undefined</code> +will be returned. A different default can be provided:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">HeaderVal</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>All headers can be retrieved at once, either directly:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">headers</span> <span style="color: #990000">:=</span> <span style="color: #009900">AllHeaders</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Or using a function:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">AllHeaders</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:headers</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Cowboy provides equivalent functions to parse individual +headers. There is no function to parse all headers at once.</p></div> +<div class="paragraph"><p>To parse a specific header:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">ParsedVal</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">ParsedVal</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>, + {<span style="color: #990000"><<</span><span style="color: #FF0000">"text"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"plain"</span><span style="color: #990000">>></span>, []})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_peer">Peer</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The peer address and port number for the connection can be +retrieved either directly or using a function.</p></div> +<div class="paragraph"><p>To retrieve the peer directly:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">peer</span> <span style="color: #990000">:=</span> {<span style="color: #009900">IP</span>, <span style="color: #009900">Port</span>}} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>And using a function:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #009900">IP</span>, <span style="color: #009900">Port</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:peer</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/static_files/"> + Static files + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/req_body/"> + Reading the request body + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/req_body.asciidoc b/docs/en/cowboy/2.2/guide/req_body.asciidoc new file mode 100644 index 00000000..4906811e --- /dev/null +++ b/docs/en/cowboy/2.2/guide/req_body.asciidoc @@ -0,0 +1,130 @@ +[[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}). +---- + +You may also disable the length limit: + +[source,erlang] +{ok, Data, Req} = cowboy_req:read_body(Req0, #{length => infinity}). + +This makes the function wait 15 seconds and return with +whatever arrived during that period. This is not +recommended for public facing applications. + +These two options can effectively be used to control +the rate of transmission of the request body. + +=== 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/2.2/guide/req_body/index.html b/docs/en/cowboy/2.2/guide/req_body/index.html new file mode 100644 index 00000000..268c62a1 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/req_body/index.html @@ -0,0 +1,303 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Reading the request body</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Reading the request body</span></h1> + +<div class="paragraph"><p>The request body can be read using the Req object.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy will not cache the body, it is therefore only +possible to read it once.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_request_body_presence">Request body presence</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Not all requests come with a body. You can check for +the presence of a request body with this function:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_body</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>It returns <code>true</code> if there is a body; <code>false</code> otherwise.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_request_body_length">Request body length</h2> +<div class="sectionbody"> +<div class="paragraph"><p>You can obtain the length of the body:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Length</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:body_length</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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’s chunked transfer-encoding, or HTTP/2 +when no content-length was provided.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_reading_the_body">Reading the body</h2> +<div class="sectionbody"> +<div class="paragraph"><p>You can read the entire body with one function call:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body</span></span>(<span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Cowboy returns an <code>ok</code> tuple when the body has been +read fully.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>These values can be customized. For example, to read +only up to 1MB for up to 5 seconds:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body</span></span>(<span style="color: #009900">Req0</span>, + #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">1000000</span>, <span style="color: #0000FF">period</span> <span style="color: #990000">=></span> <span style="color: #993399">5000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>You may also disable the length limit:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body</span></span>(<span style="color: #009900">Req0</span>, #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #FF6600">infinity</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>This makes the function wait 15 seconds and return with +whatever arrived during that period. This is not +recommended for public facing applications.</p></div> +<div class="paragraph"><p>These two options can effectively be used to control +the rate of transmission of the request body.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_streaming_the_body">Streaming the body</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">read_body_to_console</span></span>(<span style="color: #009900">Req0</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">io:format</span></span>(<span style="color: #FF0000">"~s"</span>, [<span style="color: #009900">Data</span>]), + <span style="color: #009900">Req</span>; + {<span style="color: #FF6600">more</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">io:format</span></span>(<span style="color: #FF0000">"~s"</span>, [<span style="color: #009900">Data</span>]), + <span style="font-weight: bold"><span style="color: #000000">read_body_to_console</span></span>(<span style="color: #009900">Req</span>) + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The <code>length</code> and <code>period</code> options can also be used. +They need to be passed for every call.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_reading_a_form_urlencoded_body">Reading a form urlencoded body</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy provides a convenient function for reading and +parsing bodies sent as application/x-www-form-urlencoded.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">KeyValues</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_urlencoded_body</span></span>(<span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>This function returns a list of key/values, exactly like +the function <code>cowboy_req:parse_qs/1</code>.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">KeyValues</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_urlencoded_body</span></span>(<span style="color: #009900">Req0</span>, + #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">4096</span>, <span style="color: #0000FF">period</span> <span style="color: #990000">=></span> <span style="color: #993399">3000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/req/"> + The Req object + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/resp/"> + Sending a response + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/resource_design.asciidoc b/docs/en/cowboy/2.2/guide/resource_design.asciidoc new file mode 100644 index 00000000..fa0c6122 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/resource_design.asciidoc @@ -0,0 +1,220 @@ +[[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. + +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`. + +Implement the `languages_provided` or `charsets_provided` +callbacks if applicable. + +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 `ProvideResource` callback for each +content-type returned by the `content_types_provided` +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/2.2/guide/resource_design/index.html b/docs/en/cowboy/2.2/guide/resource_design/index.html new file mode 100644 index 00000000..4823d848 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/resource_design/index.html @@ -0,0 +1,372 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Designing a resource handler</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Designing a resource handler</span></h1> + +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_the_service">The service</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_type_of_resource_handler">Type of resource handler</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Am I writing a handler for a collection of resources, +or for a single resource?</p></div> +<div class="paragraph"><p>The semantics for each of these are quite different. +You should not mix collection and single resource in +the same handler.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_collection_handler">Collection handler</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Skip this section if you are not doing a collection.</p></div> +<div class="paragraph"><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’t. When the collection is hardcoded you +can safely assume the resource always exists.</p></div> +<div class="paragraph"><p>What methods should I implement?</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The next methods are more rarely allowed.</p></div> +<div class="paragraph"><p>PUT is used to create a new collection (when +the collection isn’t hardcoded), or replace +the entire collection.</p></div> +<div class="paragraph"><p>DELETE is used to delete the entire collection.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_single_resource_handler">Single resource handler</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Skip this section if you are doing a collection.</p></div> +<div class="paragraph"><p>What methods should I implement?</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>POST is used to update the resource.</p></div> +<div class="paragraph"><p>PUT is used to create a new resource (when it doesn’t +already exist) or replace the resource.</p></div> +<div class="paragraph"><p>DELETE is used to delete the resource.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_the_resource">The resource</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Following the above discussion, implement the +<code>allowed_methods</code> callback.</p></div> +<div class="paragraph"><p>Does the resource always exist? If it may not, implement +the <code>resource_exists</code> callback.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_representations">Representations</h2> +<div class="sectionbody"> +<div class="paragraph"><p>What media types do I provide? If text based, what charsets +are provided? What languages do I provide?</p></div> +<div class="paragraph"><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>.</p></div> +<div class="paragraph"><p>Implement the <code>languages_provided</code> or <code>charsets_provided</code> +callbacks if applicable.</p></div> +<div class="paragraph"><p>Is there any other header that may make the representation +of the resource vary? Implement the <code>variances</code> callback.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_redirections">Redirections</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_the_request">The request</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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 <code>valid_entity_length</code>.</p></div> +<div class="paragraph"><p>Finally, take a look at the sections corresponding to the +methods you are implementing.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_options_method">OPTIONS method</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_get_and_head_methods">GET and HEAD methods</h2> +<div class="sectionbody"> +<div class="paragraph"><p>If you implement the methods GET and/or HEAD, you must +implement one <code>ProvideResource</code> callback for each +content-type returned by the <code>content_types_provided</code> +callback.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_put_post_and_patch_methods">PUT, POST and PATCH methods</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_delete_methods">DELETE methods</h2> +<div class="sectionbody"> +<div class="paragraph"><p>If you implement the method DELETE, you must implement +the <code>delete_resource</code> callback.</p></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_flowcharts/"> + REST flowcharts + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/ws_protocol/"> + The Websocket protocol + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/resp.asciidoc b/docs/en/cowboy/2.2/guide/resp.asciidoc new file mode 100644 index 00000000..6d4967e0 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/resp.asciidoc @@ -0,0 +1,341 @@ +[[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. + +// @todo Document trailers here. + +=== 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">>, + <<"link">> => <<"</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/2.2/guide/resp/index.html b/docs/en/cowboy/2.2/guide/resp/index.html new file mode 100644 index 00000000..0b18cc4c --- /dev/null +++ b/docs/en/cowboy/2.2/guide/resp/index.html @@ -0,0 +1,505 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Sending a response</span></h1> + +<div class="paragraph"><p>The response must be sent using the Req object.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy also provides a simplified interface for sending +files. It can also send only specific parts of a file.</p></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_reply">Reply</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>When you need to set only the status code, +use <code>cowboy_req:reply/2</code>:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>When you need to set response headers at the same time, +use <code>cowboy_req:reply/3</code>:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">303</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"location"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"https://ninenines.eu"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Note that the header name must always be a lowercase +binary.</p></div> +<div class="paragraph"><p>When you also need to set the response body, +use <code>cowboy_req:reply/4</code>:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span> +}, <span style="color: #FF0000">"Hello world!"</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Title</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"Hello world!"</span>, +<span style="color: #009900">Body</span> <span style="color: #990000">=</span> <span style="color: #990000"><<</span><span style="color: #FF0000">"Hats off!"</span><span style="color: #990000">>></span>, +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/html"</span><span style="color: #990000">>></span> +}, [<span style="color: #FF0000">"<html><head><title>"</span>, <span style="color: #009900">Title</span>, <span style="color: #FF0000">"</title></head>"</span>, + <span style="color: #FF0000">"<body><p>"</span>, <span style="color: #009900">Body</span>, <span style="color: #FF0000">"</p></body></html>"</span>], <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_stream_reply">Stream reply</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>When you need to set only the status code, +use <code>cowboy_req:stream_reply/2</code>:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_reply</span></span>(<span style="color: #993399">200</span>, <span style="color: #009900">Req0</span>), + +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #FF0000">"Hello..."</span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #FF0000">"chunked..."</span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #FF0000">"world!!"</span>, <span style="color: #FF6600">fin</span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/html"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>), + +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #FF0000">"<html><head>Hello world!</head>"</span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #FF0000">"<body><p>Hats off!</p></body></html>"</span>, <span style="color: #FF6600">fin</span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_preset_response_headers">Preset response headers</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To set response headers:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"allow"</span><span style="color: #990000">>></span>, <span style="color: #FF0000">"GET"</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Header names must be a lowercase binary.</p></div> +<div class="paragraph"><p>Do not use this function for setting cookies. Refer to +the <a href="../cookies">Cookies</a> chapter for more information.</p></div> +<div class="paragraph"><p>To check if a response header has already been set:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"allow"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>It returns <code>true</code> if the header was set, <code>false</code> otherwise.</p></div> +<div class="paragraph"><p>To delete a response header that was set previously:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:delete_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"allow"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_overriding_headers">Overriding headers</h2> +<div class="sectionbody"> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>Headers come from five different origins:</p></div> +<div class="ulist"><ul> +<li> +<p> +Protocol-specific headers (for example HTTP/1.1’s connection header) +</p> +</li> +<li> +<p> +Other required headers (for example the date header) +</p> +</li> +<li> +<p> +Preset headers +</p> +</li> +<li> +<p> +Headers given to the reply function +</p> +</li> +<li> +<p> +Set-cookie headers +</p> +</li> +</ul></div> +<div class="paragraph"><p>Cowboy does not allow overriding protocol-specific headers.</p></div> +<div class="paragraph"><p>Set-cookie headers will always be appended at the end of +the list of headers before sending the response.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Similarly, preset headers will always override required +headers.</p></div> +<div class="paragraph"><p>To illustrate, look at the following snippet. Cowboy by +default sends the server header with the value "Cowboy". +We can override it:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"server"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"yaws"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_preset_response_body">Preset response body</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To set the response body:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_body</span></span>(<span style="color: #FF0000">"Hello world!"</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>To check if a response body has already been set:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_resp_body</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>It returns <code>true</code> if the body was set and is non-empty, +<code>false</code> otherwise.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_sending_files">Sending files</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">sendfile</span>, <span style="color: #009900">Offset</span>, <span style="color: #009900">Length</span>, <span style="color: #009900">Filename</span>}</tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The length is required even for sending the entire file. +Cowboy sends it in the content-length header.</p></div> +<div class="paragraph"><p>To send a file while replying:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #FF0000">"image/png"</span> +}, {<span style="color: #FF6600">sendfile</span>, <span style="color: #993399">0</span>, <span style="color: #993399">12345</span>, <span style="color: #FF0000">"path/to/logo.png"</span>}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_informational_responses">Informational responses</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy allows you to send informational responses.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following snippet sends a 103 informational response +with some headers that are expected to be in the final +response.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:inform</span></span>(<span style="color: #993399">103</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"link"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"</style.css>; rel=preload; as=style"</span><span style="color: #990000">>></span>, + <span style="color: #990000"><<</span><span style="color: #FF0000">"link"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"</script.js>; rel=preload; as=script"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_push">Push</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Push is only available for HTTP/2. Cowboy will automatically +ignore push requests if the protocol doesn’t support it.</p></div> +<div class="paragraph"><p>The push function must be called before any of the reply +functions. Doing otherwise will result in a crash.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following snippet pushes a CSS file that is linked to +in the response:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:push</span></span>(<span style="color: #FF0000">"/static/style.css"</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"accept"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/css"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/html"</span><span style="color: #990000">>></span> +}, [<span style="color: #FF0000">"<html><head><title>My web page</title>"</span>, + <span style="color: #FF0000">"<link rel='stylesheet' type='text/css' href='/static/style.css'>"</span>, + <span style="color: #FF0000">"<body><p>Welcome to Erlang!</p></body></html>"</span>], <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:push</span></span>(<span style="color: #FF0000">"/static/style.css"</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"accept"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/css"</span><span style="color: #990000">>></span> +}, #{<span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"cdn.example.org"</span><span style="color: #990000">>></span>}, <span style="color: #009900">Req</span>),</tt></pre></div></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/req_body/"> + Reading the request body + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/cookies/"> + Using cookies + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/rest_cond.png b/docs/en/cowboy/2.2/guide/rest_cond.png Binary files differnew file mode 100644 index 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b/docs/en/cowboy/2.2/guide/rest_flowcharts.asciidoc new file mode 100644 index 00000000..b5697825 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/rest_flowcharts.asciidoc @@ -0,0 +1,248 @@ +[[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. + +=== 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. + +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 `ProvideResource` 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. + +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/2.2/guide/rest_flowcharts/index.html b/docs/en/cowboy/2.2/guide/rest_flowcharts/index.html new file mode 100644 index 00000000..fd9e66f2 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/rest_flowcharts/index.html @@ -0,0 +1,403 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: REST flowcharts</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>REST flowcharts</span></h1> + +<div class="paragraph"><p>This chapter will explain the REST handler state machine through +a number of different diagrams.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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.</p></div> +<div class="sect1"> +<h2 id="_start">Start</h2> +<div class="sectionbody"> +<div class="paragraph"><p>All requests start from here.</p></div> +<div class="imageblock"> +<div class="content"> +<img src="../rest_start.png" alt="REST starting flowchart" /> +</div> +</div> +<div class="paragraph"><p>A series of callbacks are called in succession to perform +a general checkup of the service, the request line and +request headers.</p></div> +<div class="paragraph"><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 "PUT, POST and PATCH methods" diagram, +when all conditions have been met.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>This diagram is immediately followed by either the +"OPTIONS method" diagram when the request method is +OPTIONS, or the "Content negotiation" diagram otherwise.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_options_method">OPTIONS method</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This diagram only applies to OPTIONS requests.</p></div> +<div class="imageblock"> +<div class="content"> +<img src="../rest_options.png" alt="REST OPTIONS method flowchart" /> +</div> +</div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>If the <code>options</code> callback is not defined, Cowboy will +send a response containing the list of allowed methods +by default.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_content_negotiation">Content negotiation</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This diagram applies to all request methods other than +OPTIONS. It is executed right after the "Start" diagram +is completed.</p></div> +<div class="imageblock"> +<div class="content"> +<img src="../rest_conneg.png" alt="REST content negotiation flowchart" /> +</div> +</div> +<div class="paragraph"><p>The purpose of these steps is to determine an appropriate +representation to be sent back to the client.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>If a callback is not defined, Cowboy will select the +content-type, language or charset that the client +prefers.</p></div> +<div class="paragraph"><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 +"GET and HEAD methods" diagram, when all conditions +have been met.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_get_and_head_methods">GET and HEAD methods</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This diagram only applies to GET and HEAD requests.</p></div> +<div class="paragraph"><p>For a description of the <code>cond</code> step, please see +the "Conditional requests" diagram.</p></div> +<div class="imageblock"> +<div class="content"> +<img src="../rest_get_head.png" alt="REST GET/HEAD methods flowchart" /> +</div> +</div> +<div class="paragraph"><p>When the resource exists, and the conditional steps +succeed, the resource can be retrieved.</p></div> +<div class="paragraph"><p>Cowboy prepares the response by first retrieving +metadata about the representation, then by calling +the <code>ProvideResource</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, or a fun if the +body must be streamed.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_put_post_and_patch_methods">PUT, POST and PATCH methods</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This diagram only applies to PUT, POST and PATCH requests.</p></div> +<div class="paragraph"><p>For a description of the <code>cond</code> step, please see +the "Conditional requests" diagram.</p></div> +<div class="imageblock"> +<div class="content"> +<img src="../rest_put_post_patch.png" alt="REST PUT/POST/PATCH methods flowchart" /> +</div> +</div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Then all three methods reach the <code>content_types_accepted</code> +step that we will describe in a few paragraphs.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>This callback may return one of three different return +values.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_delete_method">DELETE method</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This diagram only applies to DELETE requests.</p></div> +<div class="paragraph"><p>For a description of the <code>cond</code> step, please see +the "Conditional requests" diagram.</p></div> +<div class="imageblock"> +<div class="content"> +<img src="../rest_delete.png" alt="REST DELETE method flowchart" /> +</div> +</div> +<div class="paragraph"><p>When the resource exists, and the conditional steps +succeed, the resource can be deleted.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To finish, Cowboy checks if you set a response body, +and depending on that, sends the appropriate response.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_conditional_requests">Conditional requests</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="imageblock"> +<div class="content"> +<img src="../rest_cond.png" alt="REST conditional requests flowchart" /> +</div> +</div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>If the condition fails, the request ends immediately +without any retrieval or modification of the resource.</p></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_handlers/"> + REST handlers + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/resource_design/"> + Designing a resource handler + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</div> 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sodipodi:r2="7.4246211" + sodipodi:r1="14.849242" + sodipodi:cy="415.25897" + sodipodi:cx="-222.73865" + sodipodi:sides="3" + id="path5576-12-5-1" + 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> + </g> +</svg> diff --git a/docs/en/cowboy/2.2/guide/rest_handlers.asciidoc b/docs/en/cowboy/2.2/guide/rest_handlers.asciidoc new file mode 100644 index 00000000..dab5bead --- /dev/null +++ b/docs/en/cowboy/2.2/guide/rest_handlers.asciidoc @@ -0,0 +1,138 @@ +[[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` +| 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` +and `content_types_provided/2`. They can take any name, 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. +|=== + +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 +| content-language | Language used in the response body +| 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 +| vary | List of headers that may change the representation of the resource +|=== diff --git a/docs/en/cowboy/2.2/guide/rest_handlers/index.html b/docs/en/cowboy/2.2/guide/rest_handlers/index.html new file mode 100644 index 00000000..5e1d370b --- /dev/null +++ b/docs/en/cowboy/2.2/guide/rest_handlers/index.html @@ -0,0 +1,446 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: REST handlers</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>REST handlers</span></h1> + +<div class="paragraph"><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’s behavior.</p></div> +<div class="paragraph"><p>The REST handler is the recommended way to handle HTTP requests.</p></div> +<div class="sect1"> +<h2 id="_initialization">Initialization</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_rest</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Cowboy will then switch to the REST protocol and start executing +the state machine.</p></div> +<div class="paragraph"><p>After reaching the end of the flowchart, the <code>terminate/3</code> callback +will be called if it is defined.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_methods">Methods</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The REST component has code for handling the following HTTP methods: +HEAD, GET, POST, PATCH, PUT, DELETE and OPTIONS.</p></div> +<div class="paragraph"><p>Other methods can be accepted, however they have no specific callback +defined for them at this time.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_callbacks">Callbacks</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>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.</p></div> +<div class="tableblock"> +<table rules="all" +width="100%" +frame="border" +cellspacing="0" cellpadding="4"> +<col width="50%" /> +<col width="50%" /> +<thead> +<tr> +<th align="left" valign="top"> Callback name </th> +<th align="center" valign="top"> Default value</th> +</tr> +</thead> +<tbody> +<tr> +<td align="left" valign="top"><p class="table">allowed_methods</p></td> +<td align="center" valign="top"><p class="table"><code>[<<"GET">>, <<"HEAD">>, <<"OPTIONS">>]</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">allow_missing_post</p></td> +<td align="center" valign="top"><p class="table"><code>true</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">charsets_provided</p></td> +<td align="center" valign="top"><p class="table">skip</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">content_types_accepted</p></td> +<td align="center" valign="top"><p class="table">none</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">content_types_provided</p></td> +<td align="center" valign="top"><p class="table"><code>[{{ <<"text">>, <<"html">>, '*'}, to_html}]</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">delete_completed</p></td> +<td align="center" valign="top"><p class="table"><code>true</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">delete_resource</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">expires</p></td> +<td align="center" valign="top"><p class="table"><code>undefined</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">forbidden</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">generate_etag</p></td> +<td align="center" valign="top"><p class="table"><code>undefined</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">is_authorized</p></td> +<td align="center" valign="top"><p class="table"><code>true</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">is_conflict</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">known_methods</p></td> +<td align="center" valign="top"><p class="table"><code>[<<"GET">>, <<"HEAD">>, <<"POST">>, <<"PUT">>, <<"PATCH">>, <<"DELETE">>, <<"OPTIONS">>]</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">languages_provided</p></td> +<td align="center" valign="top"><p class="table">skip</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">last_modified</p></td> +<td align="center" valign="top"><p class="table"><code>undefined</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">malformed_request</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">moved_permanently</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">moved_temporarily</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">multiple_choices</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">options</p></td> +<td align="center" valign="top"><p class="table"><code>ok</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">previously_existed</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">resource_exists</p></td> +<td align="center" valign="top"><p class="table"><code>true</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">service_available</p></td> +<td align="center" valign="top"><p class="table"><code>true</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">uri_too_long</p></td> +<td align="center" valign="top"><p class="table"><code>false</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">valid_content_headers</p></td> +<td align="center" valign="top"><p class="table"><code>true</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">valid_entity_length</p></td> +<td align="center" valign="top"><p class="table"><code>true</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">variances</p></td> +<td align="center" valign="top"><p class="table"><code>[]</code></p></td> +</tr> +</tbody> +</table> +</div> +<div class="paragraph"><p>As you can see, Cowboy tries to move on with the request whenever +possible by using well thought out default values.</p></div> +<div class="paragraph"><p>In addition to these, there can be any number of user-defined +callbacks that are specified through <code>content_types_accepted/2</code> +and <code>content_types_provided/2</code>. They can take any name, 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’re accepting a resource given as HTML, +and in the second case that we send one as HTML.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_meta_data">Meta data</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="tableblock"> +<table rules="all" +width="100%" +frame="border" +cellspacing="0" cellpadding="4"> +<col width="50%" /> +<col width="50%" /> +<thead> +<tr> +<th align="left" valign="top"> Key </th> +<th align="left" valign="top"> Details</th> +</tr> +</thead> +<tbody> +<tr> +<td align="left" valign="top"><p class="table">media_type</p></td> +<td align="left" valign="top"><p class="table">The content-type negotiated for the response entity.</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">language</p></td> +<td align="left" valign="top"><p class="table">The language negotiated for the response entity.</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">charset</p></td> +<td align="left" valign="top"><p class="table">The charset negotiated for the response entity.</p></td> +</tr> +</tbody> +</table> +</div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_response_headers">Response headers</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy will set response headers automatically over the execution +of the REST code. They are listed in the following table.</p></div> +<div class="tableblock"> +<table rules="all" +width="100%" +frame="border" +cellspacing="0" cellpadding="4"> +<col width="50%" /> +<col width="50%" /> +<thead> +<tr> +<th align="left" valign="top"> Header name </th> +<th align="left" valign="top"> Details</th> +</tr> +</thead> +<tbody> +<tr> +<td align="left" valign="top"><p class="table">content-language</p></td> +<td align="left" valign="top"><p class="table">Language used in the response body</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">content-type</p></td> +<td align="left" valign="top"><p class="table">Media type and charset of the response body</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">etag</p></td> +<td align="left" valign="top"><p class="table">Etag of the resource</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">expires</p></td> +<td align="left" valign="top"><p class="table">Expiration date of the resource</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">last-modified</p></td> +<td align="left" valign="top"><p class="table">Last modification date for the resource</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">location</p></td> +<td align="left" valign="top"><p class="table">Relative or absolute URI to the requested resource</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">vary</p></td> +<td align="left" valign="top"><p class="table">List of headers that may change the representation of the resource</p></td> +</tr> +</tbody> +</table> +</div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_principles/"> + REST principles + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_flowcharts/"> + REST flowcharts + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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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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/2.2/guide/rest_principles/index.html b/docs/en/cowboy/2.2/guide/rest_principles/index.html new file mode 100644 index 00000000..85821c36 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/rest_principles/index.html @@ -0,0 +1,312 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: REST principles</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>REST principles</span></h1> + +<div class="paragraph"><p>This chapter will attempt to define the concepts behind REST +and explain what makes a service RESTful.</p></div> +<div class="paragraph"><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’s highly misguided at best.</p></div> +<div class="paragraph"><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’s dissertation</a> +as it does a great job explaining where it comes from and +what it achieves.</p></div> +<div class="sect1"> +<h2 id="_rest_architecture">REST architecture</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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’s side. If access to a resource +requires authentication, then the client needs to authenticate +itself with every request.</p></div> +<div class="paragraph"><p>REST is <strong>cacheable</strong>. The client, the server and any intermediary +components can all cache resources in order to improve performance.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_resources_and_resource_identifiers">Resources and resource identifiers</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>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".</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_resource_representations">Resource representations</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The representation of a resource is a sequence of bytes associated +with metadata.</p></div> +<div class="paragraph"><p>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.</p></div> +<div class="paragraph"><p>The representation metadata gives information about the +representation, such as its media type, the date of last +modification, or even a checksum.</p></div> +<div class="paragraph"><p>Resource metadata could be link to related resources or +information about additional representations of the resource.</p></div> +<div class="paragraph"><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’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.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_self_descriptive_messages">Self-descriptive messages</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_hypermedia_as_the_engine_of_application_state">Hypermedia as the engine of application state</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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’t RESTful. This is the case +for the majority of self-proclaimed REST services.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/multipart/"> + Multipart requests + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_handlers/"> + REST handlers + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + 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Erlang modules that will +handle the requests. This is called routing. + +When Cowboy receives a request, it tries to match the requested host and +path to the configured routes. When there's a match, the route's +associated handler is executed. + +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]]". + +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, NbAcceptors, TransOpts, ProtoOpts +cowboy:start_clear(my_http_listener, + [{port, 8080}], + #{env => #{dispatch => 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. diff --git a/docs/en/cowboy/2.2/guide/routing/index.html b/docs/en/cowboy/2.2/guide/routing/index.html new file mode 100644 index 00000000..1e1aad39 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/routing/index.html @@ -0,0 +1,420 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Routing</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Routing</span></h1> + +<div class="paragraph"><p>Cowboy does nothing by default.</p></div> +<div class="paragraph"><p>To make Cowboy useful, you need to map URIs to Erlang modules that will +handle the requests. This is called routing.</p></div> +<div class="paragraph"><p>When Cowboy receives a request, it tries to match the requested host and +path to the configured routes. When there’s a match, the route’s +associated handler is executed.</p></div> +<div class="paragraph"><p>Routes need to be compiled before they can be used by Cowboy. +The result of the compilation is the dispatch rules.</p></div> +<div class="sect1"> +<h2 id="_syntax">Syntax</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The general structure for the routes is defined as follow.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Routes</span> <span style="color: #990000">=</span> [<span style="color: #009900">Host1</span>, <span style="color: #009900">Host2</span>, <span style="color: #990000">...</span> <span style="color: #009900">HostN</span>]<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Each host contains matching rules for the host along with optional +constraints, and a list of routes for the path component.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Host1</span> <span style="color: #990000">=</span> {<span style="color: #009900">HostMatch</span>, <span style="color: #009900">PathsList</span>}<span style="color: #990000">.</span> +<span style="color: #009900">Host2</span> <span style="color: #990000">=</span> {<span style="color: #009900">HostMatch</span>, <span style="color: #009900">Constraints</span>, <span style="color: #009900">PathsList</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The list of routes for the path component is defined similar to the +list of hosts.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathsList</span> <span style="color: #990000">=</span> [<span style="color: #009900">Path1</span>, <span style="color: #009900">Path2</span>, <span style="color: #990000">...</span> <span style="color: #009900">PathN</span>]<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Path1</span> <span style="color: #990000">=</span> {<span style="color: #009900">PathMatch</span>, <span style="color: #009900">Handler</span>, <span style="color: #009900">InitialState</span>}<span style="color: #990000">.</span> +<span style="color: #009900">Path2</span> <span style="color: #990000">=</span> {<span style="color: #009900">PathMatch</span>, <span style="color: #009900">Constraints</span>, <span style="color: #009900">Handler</span>, <span style="color: #009900">InitialState</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Continue reading to learn more about the match syntax and the optional +constraints.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_match_syntax">Match syntax</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The match syntax is used to associate host names and paths with their +respective handlers.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch1</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/"</span><span style="color: #990000">.</span> +<span style="color: #009900">PathMatch2</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/path/to/resource"</span><span style="color: #990000">.</span> + +<span style="color: #009900">HostMatch1</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"cowboy.example.org"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch2</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/path/to/resource"</span><span style="color: #990000">.</span> +<span style="color: #009900">PathMatch3</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/path/to/resource/"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">HostMatch1</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"cowboy.example.org"</span><span style="color: #990000">.</span> +<span style="color: #009900">HostMatch2</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"cowboy.example.org."</span><span style="color: #990000">.</span> +<span style="color: #009900">HostMatch3</span> <span style="color: #990000">=</span> <span style="color: #FF0000">".cowboy.example.org"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/hats/:name/prices"</span><span style="color: #990000">.</span> +<span style="color: #009900">HostMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">":subdomain.example.org"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">HostMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"ninenines.:_"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Similarly, it is possible to have optional segments. Anything +between brackets is optional.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/hats/[page/:number]"</span><span style="color: #990000">.</span> +<span style="color: #009900">HostMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"[www.]ninenines.eu"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>You can also have imbricated optional segments.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/hats/[page/[:number]]"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/hats/[...]"</span><span style="color: #990000">.</span> +<span style="color: #009900">HostMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"[...]ninenines.eu"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/hats/:name/:name"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/hats/:name/[:name]"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>If a binding is defined in both the host and path, then they must +also share the same value.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"/:user/[...]"</span><span style="color: #990000">.</span> +<span style="color: #009900">HostMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">":user.github.com"</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Finally, there are two special match values that can be used. The +first is the atom <code>'_'</code> which will match any host or path.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathMatch</span> <span style="color: #990000">=</span> <span style="color: #FF6600">'_'</span><span style="color: #990000">.</span> +<span style="color: #009900">HostMatch</span> <span style="color: #990000">=</span> <span style="color: #FF6600">'_'</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The second is the special host match <code>"*"</code> which will match the +wildcard path, generally used alongside the <code>OPTIONS</code> method.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">HostMatch</span> <span style="color: #990000">=</span> <span style="color: #FF0000">"*"</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_constraints">Constraints</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Read more about <a href="../constraints">constraints</a>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_compilation">Compilation</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To compile routes, just call the appropriate function:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + <span style="font-style: italic"><span style="color: #9A1900">%% {HostMatch, list({PathMatch, Handler, InitialState})}</span></span> + {<span style="color: #FF6600">'_'</span>, [{<span style="color: #FF6600">'_'</span>, <span style="color: #FF6600">my_handler</span>, #{}}]} +]), +<span style="font-style: italic"><span style="color: #9A1900">%% Name, NbAcceptors, TransOpts, ProtoOpts</span></span> +<span style="font-weight: bold"><span style="color: #000000">cowboy:start_clear</span></span>(<span style="color: #FF6600">my_http_listener</span>, + [{<span style="color: #FF6600">port</span>, <span style="color: #993399">8080</span>}], + #{<span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>}} +)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_live_update">Live update</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>(<span style="color: #009900">Routes</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy:set_env</span></span>(<span style="color: #FF6600">my_http_listener</span>, <span style="color: #FF6600">dispatch</span>, <span style="color: #009900">Dispatch</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Note that you need to compile the routes again before updating.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/listeners/"> + Listeners + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/constraints/"> + Constraints + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/specs.asciidoc b/docs/en/cowboy/2.2/guide/specs.asciidoc new file mode 100644 index 00000000..ec101fbd --- /dev/null +++ b/docs/en/cowboy/2.2/guide/specs.asciidoc @@ -0,0 +1,189 @@ +[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 +* 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/rfc5988[RFC 5988]: Web Linking +* 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://www.w3.org/TR/webmention/[Webmention]: Webmention + +==== Upcoming + +* 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/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 +* 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) +* 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 +* 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 + +=== 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 diff --git a/docs/en/cowboy/2.2/guide/specs/index.html b/docs/en/cowboy/2.2/guide/specs/index.html new file mode 100644 index 00000000..cbfa8382 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/specs/index.html @@ -0,0 +1,994 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: HTTP and other specifications</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>HTTP and other specifications</span></h1> + +<div class="paragraph"><p>This chapter intends to list all the specification documents +for or related to HTTP.</p></div> +<div class="sect1"> +<h2 id="_http">HTTP</h2> +<div class="sectionbody"> +<div class="sect3"> +<h4 id="_iana_registries">IANA Registries</h4> +<div class="ulist"><ul> +<li> +<p> +<a href="https://www.iana.org/assignments/http-methods/http-methods.xhtml">HTTP Method Registry</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml">HTTP Status Code Registry</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/message-headers/message-headers.xhtml">Message Headers</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-parameters/http-parameters.xhtml">HTTP Parameters</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-alt-svc-parameters/http-alt-svc-parameters.xhtml">HTTP Alt-Svc Parameter Registry</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml">HTTP Authentication Scheme Registry</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-cache-directives/http-cache-directives.xhtml">HTTP Cache Directive Registry</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-dig-alg/http-dig-alg.xhtml">HTTP Digest Algorithm Values</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/hoba-device-identifiers/hoba-device-identifiers.xhtml">HTTP Origin-Bound Authentication Device Identifier Types</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-upgrade-tokens/http-upgrade-tokens.xhtml">HTTP Upgrade Token Registry</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http-warn-codes/http-warn-codes.xhtml">HTTP Warn Codes</a> +</p> +</li> +<li> +<p> +<a href="https://www.iana.org/assignments/http2-parameters/http2-parameters.xhtml">HTTP/2 Parameters</a> +</p> +</li> +<li> +<p> +<a href="https://www.ietf.org/assignments/websocket/websocket.xml">WebSocket Protocol Registries</a> +</p> +</li> +</ul></div> +</div> +<div class="sect3"> +<h4 id="_current">Current</h4> +<div class="ulist"><ul> +<li> +<p> +<a href="http://www.w3.org/TR/cors/">CORS</a>: Cross-Origin Resource Sharing +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/CSP2/">CSP2</a>: Content Security Policy Level 2 +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/tracking-dnt/">DNT</a>: Tracking Preference Expression (DNT) +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/eventsource/">eventsource</a>: Server-Sent Events +</p> +</li> +<li> +<p> +<a href="https://www.w3.org/TR/html4/interact/forms.html#h-17.13.4">Form content types</a>: Form content types +</p> +</li> +<li> +<p> +<a href="https://www.w3.org/TR/preload/">Preload</a>: Preload +</p> +</li> +<li> +<p> +<a href="http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm">REST</a>: Fielding’s Dissertation +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc1945">RFC 1945</a>: HTTP/1.0 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc1951">RFC 1951</a>: DEFLATE Compressed Data Format Specification version 1.3 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc1952">RFC 1952</a>: GZIP file format specification version 4.3 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2046#section-5.1">RFC 2046</a>: Multipart media type (in MIME Part Two: Media Types) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2295">RFC 2295</a>: Transparent Content Negotiation in HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2296">RFC 2296</a>: HTTP Remote Variant Selection Algorithm: RVSA/1.0 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2817">RFC 2817</a>: Upgrading to TLS Within HTTP/1.1 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2818">RFC 2818</a>: HTTP Over TLS +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc3230">RFC 3230</a>: Instance Digests in HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc4559">RFC 4559</a>: SPNEGO-based Kerberos and NTLM HTTP Authentication in Microsoft Windows +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5789">RFC 5789</a>: PATCH Method for HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5843">RFC 5843</a>: Additional Hash Algorithms for HTTP Instance Digests +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5861">RFC 5861</a>: HTTP Cache-Control Extensions for Stale Content +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5988">RFC 5988</a>: Web Linking +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6265">RFC 6265</a>: HTTP State Management Mechanism +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6266">RFC 6266</a>: Use of the Content-Disposition Header Field +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6454">RFC 6454</a>: The Web Origin Concept +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6455">RFC 6455</a>: The WebSocket Protocol +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6585">RFC 6585</a>: Additional HTTP Status Codes +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6750">RFC 6750</a>: The OAuth 2.0 Authorization Framework: Bearer Token Usage +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6797">RFC 6797</a>: HTTP Strict Transport Security (HSTS) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6903">RFC 6903</a>: Additional Link Relation Types +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7034">RFC 7034</a>: HTTP Header Field X-Frame-Options +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7089">RFC 7089</a>: Time-Based Access to Resource States: Memento +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7230">RFC 7230</a>: HTTP/1.1 Message Syntax and Routing +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7231">RFC 7231</a>: HTTP/1.1 Semantics and Content +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7232">RFC 7232</a>: HTTP/1.1 Conditional Requests +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7233">RFC 7233</a>: HTTP/1.1 Range Requests +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7234">RFC 7234</a>: HTTP/1.1 Caching +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7235">RFC 7235</a>: HTTP/1.1 Authentication +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7239">RFC 7239</a>: Forwarded HTTP Extension +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7240">RFC 7240</a>: Prefer Header for HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7469">RFC 7469</a>: Public Key Pinning Extension for HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7486">RFC 7486</a>: HTTP Origin-Bound Authentication (HOBA) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7538">RFC 7538</a>: HTTP Status Code 308 (Permanent Redirect) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7540">RFC 7540</a>: Hypertext Transfer Protocol Version 2 (HTTP/2) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7541">RFC 7541</a>: HPACK: Header Compression for HTTP/2 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7578">RFC 7578</a>: Returning Values from Forms: multipart/form-data +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7615">RFC 7615</a>: HTTP Authentication-Info and Proxy-Authentication-Info Response Header Fields +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7616">RFC 7616</a>: HTTP Digest Access Authentication +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7617">RFC 7617</a>: The <em>Basic</em> HTTP Authentication Scheme +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7639">RFC 7639</a>: The ALPN HTTP Header Field +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7692">RFC 7692</a>: Compression Extensions for WebSocket +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7694">RFC 7694</a>: HTTP Client-Initiated Content-Encoding +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7725">RFC 7725</a>: An HTTP Status Code to Report Legal Obstacles +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7804">RFC 7804</a>: Salted Challenge Response HTTP Authentication Mechanism +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7838">RFC 7838</a>: HTTP Alternative Services +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7932">RFC 7932</a>: Brotli Compressed Data Format +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7936">RFC 7936</a>: Clarifying Registry Procedures for the WebSocket Subprotocol Name Registry +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8053">RFC 8053</a>: HTTP Authentication Extensions for Interactive Clients +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8164">RFC 8164</a>: Opportunistic Security for HTTP/2 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8187">RFC 8187</a>: Indicating Character Encoding and Language for HTTP Header Field Parameters +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8188">RFC 8188</a>: Encrypted Content-Encoding for HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8246">RFC 8246</a>: HTTP Immutable Responses +</p> +</li> +<li> +<p> +<a href="https://www.w3.org/TR/webmention/">Webmention</a>: Webmention +</p> +</li> +</ul></div> +</div> +<div class="sect3"> +<h4 id="_upcoming">Upcoming</h4> +<div class="ulist"><ul> +<li> +<p> +<a href="https://www.w3.org/TR/csp-cookies/">Content Security Policy: Cookie Controls</a> +</p> +</li> +<li> +<p> +<a href="https://www.w3.org/TR/csp-embedded-enforcement/">Content Security Policy: Embedded Enforcement</a> +</p> +</li> +<li> +<p> +<a href="https://www.w3.org/TR/CSP3/">Content Security Policy Level 3</a> +</p> +</li> +<li> +<p> +<a href="https://www.w3.org/TR/csp-pinning/">Content Security Policy Pinning</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/referrer-policy/">Referrer Policy</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/UISecurity/">User Interface Security Directives for Content Security Policy</a> +</p> +</li> +</ul></div> +</div> +<div class="sect3"> +<h4 id="_informative">Informative</h4> +<div class="ulist"><ul> +<li> +<p> +<a href="http://www.w3.org/TR/webarch/">Architecture of the World Wide Web</a> +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2936">RFC 2936</a>: HTTP MIME Type Handler Detection +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2964">RFC 2964</a>: Use of HTTP State Management +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc3143">RFC 3143</a>: Known HTTP Proxy/Caching Problems +</p> +</li> +<li> +<p> +<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 +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6838">RFC 6838</a>: Media Type Specifications and Registration Procedures +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7478">RFC 7478</a>: Web Real-Time Communication Use Cases and Requirements +</p> +</li> +</ul></div> +</div> +<div class="sect3"> +<h4 id="_related">Related</h4> +<div class="ulist"><ul> +<li> +<p> +<a href="http://www.w3.org/TR/app-uri/">app: URL Scheme</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/beacon/">Beacon</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/FileAPI/">File API</a> +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8030">Generic Event Delivery Using HTTP Push</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/capability-urls/">Good Practices for Capability URLs</a> +</p> +</li> +<li> +<p> +<a href="https://html.spec.whatwg.org/multipage/">HTML Living Standard</a> +</p> +</li> +<li> +<p> +<a href="https://developers.whatwg.org/">HTML Living Standard for Web developers</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/html401/">HTML4.01</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/html5/">HTML5</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/html51/">HTML5.1</a> +</p> +</li> +<li> +<p> +<a href="https://www.w3.org/TR/html52/">HTML5.2</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/media-frags/">Media Fragments URI 1.0</a> +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6690">RFC 6690</a>: Constrained RESTful Environments (CoRE) Link Format +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7807">RFC 7807</a>: Problem Details for HTTP APIs +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6906">RFC 6906</a>: The <em>profile</em> Link Relation Type +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/SRI/">Subresource Integrity</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/tracking-compliance/">Tracking Compliance and Scope</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/media-frags-reqs/">Use cases and requirements for Media Fragments</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/webrtc/">WebRTC 1.0: Real-time Communication Between Browsers</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/websockets/">Websocket API</a> +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/XMLHttpRequest/">XMLHttpRequest Level 1</a> +</p> +</li> +<li> +<p> +<a href="https://xhr.spec.whatwg.org/">XMLHttpRequest Living Standard</a> +</p> +</li> +</ul></div> +</div> +<div class="sect3"> +<h4 id="_seemingly_obsolete">Seemingly obsolete</h4> +<div class="ulist"><ul> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2227">RFC 2227</a>: Simple Hit-Metering and Usage-Limiting for HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2310">RFC 2310</a>: The Safe Response Header Field +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2324">RFC 2324</a>: Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2660">RFC 2660</a>: The Secure HyperText Transfer Protocol +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2774">RFC 2774</a>: An HTTP Extension Framework +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc2965">RFC 2965</a>: HTTP State Management Mechanism (Cookie2) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc3229">RFC 3229</a>: Delta encoding in HTTP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7168">RFC 7168</a>: The Hyper Text Coffee Pot Control Protocol for Tea Efflux Appliances (HTCPCP-TEA) +</p> +</li> +<li> +<p> +<a href="http://dev.chromium.org/spdy/spdy-protocol">SPDY</a>: SPDY Protocol +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/draft-tyoshino-hybi-websocket-perframe-deflate-06">x-webkit-deflate-frame</a>: Deprecated Websocket compression +</p> +</li> +</ul></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_url">URL</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc3986">RFC 3986</a>: URI Generic Syntax +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6570">RFC 6570</a>: URI Template +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6874">RFC 6874</a>: Representing IPv6 Zone Identifiers in Address Literals and URIs +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7320">RFC 7320</a>: URI Design and Ownership +</p> +</li> +<li> +<p> +<a href="http://www.w3.org/TR/url-1/">URL</a> +</p> +</li> +<li> +<p> +<a href="https://url.spec.whatwg.org/">URL Living Standard</a> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_webdav">WebDAV</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc3253">RFC 3253</a>: Versioning Extensions to WebDAV +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc3648">RFC 3648</a>: WebDAV Ordered Collections Protocol +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc3744">RFC 3744</a>: WebDAV Access Control Protocol +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc4316">RFC 4316</a>: Datatypes for WebDAV Properties +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc4331">RFC 4331</a>: Quota and Size Properties for DAV Collections +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc4437">RFC 4437</a>: WebDAV Redirect Reference Resources +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc4709">RFC 4709</a>: Mounting WebDAV Servers +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc4791">RFC 4791</a>: Calendaring Extensions to WebDAV (CalDAV) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc4918">RFC 4918</a>: HTTP Extensions for WebDAV +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5323">RFC 5323</a>: WebDAV SEARCH +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5397">RFC 5397</a>: WebDAV Current Principal Extension +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5689">RFC 5689</a>: Extended MKCOL for WebDAV +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5842">RFC 5842</a>: Binding Extensions to WebDAV +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc5995">RFC 5995</a>: Using POST to Add Members to WebDAV Collections +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6352">RFC 6352</a>: CardDAV: vCard Extensions to WebDAV +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6578">RFC 6578</a>: Collection Synchronization for WebDAV +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc6638">RFC 6638</a>: Scheduling Extensions to CalDAV +</p> +</li> +<li> +<p> +<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) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7809">RFC 7809</a>: Calendaring Extensions to WebDAV (CalDAV): Time Zones by Reference +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7953">RFC 7953</a>: Calendar Availability +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8144">RFC 8144</a>: Use of the Prefer Header Field in WebDAV +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_coap">CoAP</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7252">RFC 7252</a>: The Constrained Application Protocol (CoAP) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7390">RFC 7390</a>: Group Communication for CoAP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7641">RFC 7641</a>: Observing Resources in CoAP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7650">RFC 7650</a>: A CoAP Usage for REsource LOcation And Discovery (RELOAD) +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7959">RFC 7959</a>: Block-Wise Transfers in CoAP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc7967">RFC 7967</a>: CoAP Option for No Server Response +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8075">RFC 8075</a>: Guidelines for Mapping Implementations: HTTP to CoAP +</p> +</li> +<li> +<p> +<a href="https://tools.ietf.org/html/rfc8132">RFC 8132</a>: PATCH and FETCH Methods for CoAP +</p> +</li> +</ul></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/migrating_from_1.0/"> + Migrating from Cowboy 1.0 to 2.0 + </a> + + + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/static_files.asciidoc b/docs/en/cowboy/2.2/guide/static_files.asciidoc new file mode 100644 index 00000000..9d9b8cc2 --- /dev/null +++ b/docs/en/cowboy/2.2/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 an application's +private directory. + +The following rule will serve any file found in the application +`my_app`'s priv directory inside the `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/2.2/guide/static_files/index.html b/docs/en/cowboy/2.2/guide/static_files/index.html new file mode 100644 index 00000000..e1c48e16 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/static_files/index.html @@ -0,0 +1,332 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Static files</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Static files</span></h1> + +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_serve_one_file">Serve one file</h2> +<div class="sectionbody"> +<div class="paragraph"><p>You can use the static handler to serve one specific file +from an application’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’s private directory.</p></div> +<div class="paragraph"><p>The following rule will serve the file <em>static/index.html</em> +from the application <code>my_app</code>'s priv directory whenever the +path <code>/</code> is accessed:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_file</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/index.html"</span>}}</tt></pre></div></div> +<div class="paragraph"><p>You can also specify the absolute path to a file, or the +path to the file relative to the current directory:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">file</span>, <span style="color: #FF0000">"/var/www/index.html"</span>}}</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_serve_all_files_from_a_directory">Serve all files from a directory</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>You can specify the directory relative to an application’s +private directory.</p></div> +<div class="paragraph"><p>The following rule will serve any file found in the application +<code>my_app</code>'s priv directory inside the <code>static/assets</code> folder +whenever the requested path begins with <code>/assets/</code>:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/assets/[...]"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_dir</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/assets"</span>}}</tt></pre></div></div> +<div class="paragraph"><p>You can also specify the absolute path to the directory or +set it relative to the current directory:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/assets/[...]"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">dir</span>, <span style="color: #FF0000">"/var/www/assets"</span>}}</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_customize_the_mimetype_detection">Customize the mimetype detection</h2> +<div class="sectionbody"> +<div class="paragraph"><p>By default, Cowboy will attempt to recognize the mimetype +of your static files by looking at the extension.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/assets/[...]"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_dir</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/assets"</span>, + [{<span style="color: #FF6600">mimetypes</span>, <span style="color: #FF6600">cow_mimetypes</span>, <span style="color: #FF6600">web</span>}]}}</tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To use the function that will detect almost any mimetype, +the following configuration will do:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/assets/[...]"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_dir</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/assets"</span>, + [{<span style="color: #FF6600">mimetypes</span>, <span style="color: #FF6600">cow_mimetypes</span>, <span style="color: #FF6600">all</span>}]}}</tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/assets/[...]"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_dir</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/assets"</span>, + [{<span style="color: #FF6600">mimetypes</span>, <span style="color: #009900">Module</span>, <span style="color: #009900">Function</span>}]}}</tt></pre></div></div> +<div class="paragraph"><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’t figure out the mimetype, +then it should return <code>{<<"application">>, <<"octet-stream">>, []}</code>.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_file</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/index.html"</span>, + [{<span style="color: #FF6600">mimetypes</span>, {<span style="color: #990000"><<</span><span style="color: #FF0000">"text"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"html"</span><span style="color: #990000">>></span>, []}}]}}</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_generate_an_etag">Generate an etag</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>You can however change the way the etag is calculated:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/assets/[...]"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_dir</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/assets"</span>, + [{<span style="color: #FF6600">etag</span>, <span style="color: #009900">Module</span>, <span style="color: #009900">Function</span>}]}}</tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>You can also completely disable etag handling:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF0000">"/assets/[...]"</span>, <span style="color: #FF6600">cowboy_static</span>, {<span style="color: #FF6600">priv_dir</span>, <span style="color: #FF6600">my_app</span>, <span style="color: #FF0000">"static/assets"</span>, + [{<span style="color: #FF6600">etag</span>, <span style="color: #000080">false</span>}]}}</tt></pre></div></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/loop_handlers/"> + Loop handlers + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/req/"> + The Req object + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/streams.asciidoc b/docs/en/cowboy/2.2/guide/streams.asciidoc new file mode 100644 index 00000000..841a9712 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/streams.asciidoc @@ -0,0 +1,65 @@ +[[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 + +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 two handlers. + +`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. + +`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. diff --git a/docs/en/cowboy/2.2/guide/streams/index.html b/docs/en/cowboy/2.2/guide/streams/index.html new file mode 100644 index 00000000..cd44a899 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/streams/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Streams</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Streams</span></h1> + +<div class="paragraph"><p>A stream is the set of messages that form an HTTP +request/response pair.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_stream_handlers">Stream handlers</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Stream handlers must implement five different callbacks. +Four of them are directly related; one is special.</p></div> +<div class="paragraph"><p>All callbacks receives the stream ID as first argument.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_built_in_handlers">Built-in handlers</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy comes with two handlers.</p></div> +<div class="paragraph"><p><code>cowboy_stream_h</code> 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></div> +<div class="paragraph"><p><code>cowboy_compress_h</code> 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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/ws_handlers/"> + Websocket handlers + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/middlewares/"> + Middlewares + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/ws_handlers.asciidoc b/docs/en/cowboy/2.2/guide/ws_handlers.asciidoc new file mode 100644 index 00000000..a79d7e29 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/ws_handlers.asciidoc @@ -0,0 +1,269 @@ +[[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:keymember(<<"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) -> + {reply, {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) -> + {reply, 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) -> + {reply, {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 a reply tuple with the frame to send: + +[source,erlang] +---- +websocket_info(_Info, State) -> + {reply, {text, <<"Hello!">>}, State}. +---- + +You can send frames of any type: text, binary, ping, pong +or close frames. + +To send many frames at once, return a reply tuple with the +list of frames to send: + +[source,erlang] +---- +websocket_info(_Info, State) -> + {reply, [ + {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`. + +=== Saving memory + +The Websocket connection process can be set to hibernate +after the callback returns. + +Simply add an `hibernate` field to the ok or reply tuples: + +[source,erlang] +---- +websocket_init(State) -> + {ok, State, hibernate}. + +websocket_handle(_Frame, State) -> + {ok, State, hibernate}. + +websocket_info(_Info, State) -> + {reply, {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. diff --git a/docs/en/cowboy/2.2/guide/ws_handlers/index.html b/docs/en/cowboy/2.2/guide/ws_handlers/index.html new file mode 100644 index 00000000..28f16a6a --- /dev/null +++ b/docs/en/cowboy/2.2/guide/ws_handlers/index.html @@ -0,0 +1,430 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Websocket handlers</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>Websocket handlers</span></h1> + +<div class="paragraph"><p>Websocket handlers provide an interface for upgrading HTTP/1.1 +connections to Websocket and sending or receiving frames on +the Websocket connection.</p></div> +<div class="paragraph"><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></div> +<div class="sect1"> +<h2 id="_upgrade">Upgrade</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_subprotocol">Subprotocol</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>For example, a client could understand both STOMP and MQTT over +Websocket, and provide the header:</p></div> +<div class="listingblock"> +<div class="content"> +<pre><code>sec-websocket-protocol: v12.stomp, mqtt</code></pre> +</div></div> +<div class="paragraph"><p>If the server only understands MQTT it can return:</p></div> +<div class="listingblock"> +<div class="content"> +<pre><code>sec-websocket-protocol: mqtt</code></pre> +</div></div> +<div class="paragraph"><p>This selection must be done in <code>init/2</code>. An example usage could +be:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sec-websocket-protocol"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + <span style="color: #000080">undefined</span> <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req0</span>, <span style="color: #009900">State</span>}; + <span style="color: #009900">Subprotocols</span> <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">lists:keymember</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"mqtt"</span><span style="color: #990000">>></span>, <span style="color: #993399">1</span>, <span style="color: #009900">Subprotocols</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + <span style="color: #000080">true</span> <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sec-websocket-protocol"</span><span style="color: #990000">>></span>, + <span style="color: #990000"><<</span><span style="color: #FF0000">"mqtt"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>), + {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}; + <span style="color: #000080">false</span> <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">400</span>, <span style="color: #009900">Req0</span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span> + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_post_upgrade_initialization">Post-upgrade initialization</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_init</span></span>(<span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">erlang:start_timer</span></span>(<span style="color: #993399">1000</span>, <span style="font-weight: bold"><span style="color: #000080">self</span></span>(), <span style="color: #990000"><<</span><span style="color: #FF0000">"Hello!"</span><span style="color: #990000">>></span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_init</span></span>(<span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">reply</span>, {<span style="color: #FF6600">text</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"Hello!"</span><span style="color: #990000">>></span>}, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_receiving_frames">Receiving frames</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy will call <code>websocket_handle/2</code> whenever a text, binary, +ping or pong frame arrives from the client.</p></div> +<div class="paragraph"><p>The handler can handle or ignore the frames. It can also +send frames back to the client or stop the connection.</p></div> +<div class="paragraph"><p>The following snippet echoes back any text frame received and +ignores all others:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_handle</span></span>(<span style="color: #009900">Frame</span> <span style="color: #990000">=</span> {<span style="color: #FF6600">text</span>, <span style="color: #990000">_</span>}, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">reply</span>, <span style="color: #009900">Frame</span>, <span style="color: #009900">State</span>}; +<span style="font-weight: bold"><span style="color: #000000">websocket_handle</span></span>(<span style="color: #009900">_Frame</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_receiving_erlang_messages">Receiving Erlang messages</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy will call <code>websocket_info/2</code> whenever an Erlang message +arrives.</p></div> +<div class="paragraph"><p>The handler can handle or ignore the messages. It can also +send frames to the client or stop the connection.</p></div> +<div class="paragraph"><p>The following snippet forwards log messages to the client +and ignores all others:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>({<span style="font-weight: bold"><span style="color: #000080">log</span></span>, <span style="color: #009900">Text</span>}, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">reply</span>, {<span style="color: #FF6600">text</span>, <span style="color: #009900">Text</span>}, <span style="color: #009900">State</span>}; +<span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>(<span style="color: #009900">_Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_sending_frames">Sending frames</h2> +<div class="sectionbody"> +<div class="paragraph"><p>All <code>websocket_</code> callbacks share return values. They may +send zero, one or many frames to the client.</p></div> +<div class="paragraph"><p>To send nothing, just return an ok tuple:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>(<span style="color: #009900">_Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>To send one frame, return a reply tuple with the frame to send:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>(<span style="color: #009900">_Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">reply</span>, {<span style="color: #FF6600">text</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"Hello!"</span><span style="color: #990000">>></span>}, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>You can send frames of any type: text, binary, ping, pong +or close frames.</p></div> +<div class="paragraph"><p>To send many frames at once, return a reply tuple with the +list of frames to send:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>(<span style="color: #009900">_Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">reply</span>, [ + {<span style="color: #FF6600">text</span>, <span style="color: #FF0000">"Hello"</span>}, + {<span style="color: #FF6600">text</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"world!"</span><span style="color: #990000">>></span>}, + {<span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="color: #990000"><<</span><span style="color: #993399">0</span><span style="color: #990000">:</span><span style="color: #993399">8000</span><span style="color: #990000">>></span>} + ], <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>They are sent in the given order.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_keeping_the_connection_alive">Keeping the connection alive</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, #{ + <span style="color: #0000FF">idle_timeout</span> <span style="color: #990000">=></span> <span style="color: #993399">30000</span>}}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>This value cannot be changed once it is set. It defaults to +<code>60000</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_saving_memory">Saving memory</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The Websocket connection process can be set to hibernate +after the callback returns.</p></div> +<div class="paragraph"><p>Simply add an <code>hibernate</code> field to the ok or reply tuples:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_init</span></span>(<span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>}<span style="color: #990000">.</span> + +<span style="font-weight: bold"><span style="color: #000000">websocket_handle</span></span>(<span style="color: #009900">_Frame</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>}<span style="color: #990000">.</span> + +<span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>(<span style="color: #009900">_Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">reply</span>, {<span style="color: #FF6600">text</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"Hello!"</span><span style="color: #990000">>></span>}, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_closing_the_connection">Closing the connection</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The connection can be closed at any time, either by telling +Cowboy to stop it or by sending a close frame.</p></div> +<div class="paragraph"><p>To tell Cowboy to close the connection, use a stop tuple:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>(<span style="color: #009900">_Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">stop</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/ws_protocol/"> + The Websocket protocol + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/streams/"> + Streams + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/guide/ws_protocol.asciidoc b/docs/en/cowboy/2.2/guide/ws_protocol.asciidoc new file mode 100644 index 00000000..8fa0673d --- /dev/null +++ b/docs/en/cowboy/2.2/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/2.2/guide/ws_protocol/index.html b/docs/en/cowboy/2.2/guide/ws_protocol/index.html new file mode 100644 index 00000000..328eaa74 --- /dev/null +++ b/docs/en/cowboy/2.2/guide/ws_protocol/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>The Websocket protocol</span></h1> + +<div class="paragraph"><p>This chapter explains what Websocket is and why it is +a vital component of soft realtime Web applications.</p></div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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 +"version 0".</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_websocket_vs_http_2">Websocket vs HTTP/2</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_implementation">Implementation</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy’s Websocket implementation also includes the +permessage-deflate and x-webkit-deflate-frame compression +extensions.</p></div> +<div class="paragraph"><p>Cowboy will automatically use compression when the +<code>compress</code> option is returned from the <code>init/2</code> function.</p></div> +</div> +</div> + + + + + + + + + + + <nav style="margin:1em 0"> + + <a style="float:left" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/resource_design/"> + Designing a resource handler + </a> + + + + <a style="float:right" href="https://ninenines.eu/docs/en/cowboy/2.2/guide/ws_handlers/"> + Websocket handlers + </a> + + </nav> + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + + User Guide +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/guide">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/guide">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/guide">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/guide">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy.set_env/index.html b/docs/en/cowboy/2.2/manual/cowboy.set_env/index.html new file mode 100644 index 00000000..ffa3dd6c --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy.set_env/index.html @@ -0,0 +1,254 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy:set_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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:set_env(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy:set_env - Update a listener’s environment value</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">set_env</span></span>(<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">ranch:ref</span></span>(), + <span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>(), + <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()) + <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span></tt></pre></div></div> +<div class="paragraph"><p>Set or update an environment value for a previously started +listener.</p></div> +<div class="paragraph"><p>This is most useful for updating the routes dynamically, +without having to restart the listener.</p></div> +<div class="paragraph"><p>The new value will only be available to new connections. +Pre-existing connections will still use the old value.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +The name of the listener to update. +</p> +<div class="paragraph"><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></div> +</dd> +<dt class="hdlist1"> +Key +</dt> +<dd> +<p> +The key in the environment map. Common keys include <code>dispatch</code> +and <code>middlewares</code>. +</p> +</dd> +<dt class="hdlist1"> +Value +</dt> +<dd> +<p> +The new value. +</p> +<div class="paragraph"><p>The type of the value differs depending on the key.</p></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The atom <code>ok</code> is returned on success.</p></div> +<div class="paragraph"><p>An <code>exit:badarg</code> exception is thrown when the listener does +not exist.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Update a listener’s routes</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + {<span style="color: #FF6600">'_'</span>, [ + {<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">toppage_h</span>, []}, + {<span style="color: #FF0000">"/ws"</span>, <span style="color: #FF6600">websocket_h</span>, []} + ]} +]), + +<span style="font-weight: bold"><span style="color: #000000">cowboy:set_env</span></span>(<span style="color: #FF6600">example</span>, <span style="color: #FF6600">dispatch</span>, <span style="color: #009900">Dispatch</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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.set_protocol_options">ranch:set_protocol_options(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy.start_clear/index.html b/docs/en/cowboy/2.2/manual/cowboy.start_clear/index.html new file mode 100644 index 00000000..7afcd876 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy.start_clear/index.html @@ -0,0 +1,285 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy:start_clear(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:start_clear(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy:start_clear - Listen for connections using plain TCP</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">start_clear</span></span>(<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">ranch:ref</span></span>(), + <span style="color: #009900">TransportOpts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">ranch_tcp:opts</span></span>(), + <span style="color: #009900">ProtocolOpts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">opts</span></span>()) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">ListenerPid</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">pid</span></span>()} + | {<span style="color: #FF6600">error</span>, <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Start listening for connections over a clear TCP channel.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +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> +<div class="paragraph"><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></div> +</dd> +<dt class="hdlist1"> +TransportOpts +</dt> +<dd> +<p> +The transport options are where the TCP options, including +the listener’s port number, are defined. Transport options +are provided as a list of keys and values, for example +<code>[{port, 8080}]</code>. +</p> +<div class="paragraph"><p>The available options are documented in the +<a href="../ranch_tcp">ranch_tcp(3)</a> manual.</p></div> +</dd> +<dt class="hdlist1"> +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> +<div class="paragraph"><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></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>An ok tuple is returned on success. It contains the pid of +the top-level supervisor for the listener.</p></div> +<div class="paragraph"><p>An error tuple is returned on error. The error reason may +be any Erlang term.</p></div> +<div class="paragraph"><p>A common error is <code>eaddrinuse</code>. It indicates that the port +configured for Cowboy is already in use.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: HTTP/2 support added. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>cowboy:start_http/4</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Start a listener</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + {<span style="color: #FF6600">'_'</span>, [ + {<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">toppage_h</span>, []} + ]} +]), + +{<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_clear</span></span>(<span style="color: #FF6600">example</span>, [{<span style="color: #FF6600">port</span>, <span style="color: #993399">8080</span>}], #{ + <span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>} +})<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Name</span> <span style="color: #990000">=</span> <span style="color: #FF6600">example</span>, + +{<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_clear</span></span>(<span style="color: #009900">Name</span>, [], #{ + <span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>} +}), + +<span style="color: #009900">Port</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">ranch:get_port</span></span>(<span style="color: #009900">Name</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy.start_tls/index.html b/docs/en/cowboy/2.2/manual/cowboy.start_tls/index.html new file mode 100644 index 00000000..a7692965 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy.start_tls/index.html @@ -0,0 +1,290 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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'> + <link href="/css/99s.css?r=1" rel="stylesheet"> + + <link rel="shortcut icon" href="/img/ico/favicon.ico"> + <link rel="apple-touch-icon-precomposed" 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alt="Github"></a> + </li> + <li> + <a title="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:start_tls(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy:start_tls - Listen for connections using TLS</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">start_tls</span></span>(<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">ranch:ref</span></span>(), + <span style="color: #009900">TransportOpts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">ranch_ssl:opts</span></span>(), + <span style="color: #009900">ProtocolOpts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">opts</span></span>()) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">ListenerPid</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">pid</span></span>()} + | {<span style="color: #FF6600">error</span>, <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Start listening for connections over a secure TLS channel.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +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> +<div class="paragraph"><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></div> +</dd> +<dt class="hdlist1"> +TransportOpts +</dt> +<dd> +<p> +The transport options are where the TCP options, including +the listener’s port number, are defined. They also contain +the TLS options, like the server’s certificate. Transport options +are provided as a list of keys and values, for example +<code>[{port, 8443}, {certfile, "path/to/cert.pem"}]</code>. +</p> +<div class="paragraph"><p>The available options are documented in the +<a href="../ranch_ssl">ranch_ssl(3)</a> manual.</p></div> +</dd> +<dt class="hdlist1"> +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> +<div class="paragraph"><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></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>An ok tuple is returned on success. It contains the pid of +the top-level supervisor for the listener.</p></div> +<div class="paragraph"><p>An error tuple is returned on error. The error reason may +be any Erlang term.</p></div> +<div class="paragraph"><p>A common error is <code>eaddrinuse</code>. It indicates that the port +configured for Cowboy is already in use.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: HTTP/2 support added. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>cowboy:start_https/4</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Start a listener</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + {<span style="color: #FF6600">'_'</span>, [ + {<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">toppage_h</span>, []} + ]} +]), + +{<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_tls</span></span>(<span style="color: #FF6600">example</span>, [ + {<span style="color: #FF6600">port</span>, <span style="color: #993399">8443</span>}, + {<span style="color: #FF6600">cert</span>, <span style="color: #FF0000">"path/to/cert.pem"</span>} +], #{ + <span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>} +})<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Name</span> <span style="color: #990000">=</span> <span style="color: #FF6600">example</span>, + +{<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_tls</span></span>(<span style="color: #009900">Name</span>, [ + {<span style="color: #FF6600">cert</span>, <span style="color: #FF0000">"path/to/cert.pem"</span>} +], #{ + <span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>} +}), + +<span style="color: #009900">Port</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">ranch:get_port</span></span>(<span style="color: #009900">Name</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy.stop_listener/index.html b/docs/en/cowboy/2.2/manual/cowboy.stop_listener/index.html new file mode 100644 index 00000000..d908dc1a --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy.stop_listener/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:stop_listener(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy:stop_listener - Stop the given listener</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">stop_listener</span></span>(<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">ranch:ref</span></span>()) + <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> | {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">not_found</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Stop a previously started listener.</p></div> +<div class="paragraph"><p>Alias of <a href="../ranch.stop_listener">ranch:stop_listener(3)</a>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +The name of the listener to be stopped. +</p> +<div class="paragraph"><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></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The atom <code>ok</code> is returned on success.</p></div> +<div class="paragraph"><p>The <code>{error, not_found}</code> tuple is returned when the listener +does not exist.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Stop a listener</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #0000FF">ok</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:stop_listener</span></span>(<span style="color: #FF6600">example</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" title="Contact 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id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy</code> provides convenience functions for +manipulating Ranch listeners.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_exports">Exports</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy.start_clear">cowboy:start_clear(3)</a> - Listen for connections using plain TCP +</p> +</li> +<li> +<p> +<a href="../cowboy.start_tls">cowboy:start_tls(3)</a> - Listen for connections using TLS +</p> +</li> +<li> +<p> +<a href="../cowboy.stop_listener">cowboy:stop_listener(3)</a> - Stop the given listener +</p> +</li> +<li> +<p> +<a href="../cowboy.set_env">cowboy:set_env(3)</a> - Update a listener’s environment value +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_types">Types</h2> +<div class="sectionbody"> +<div class="sect2"> +<h3 id="_fields">fields()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">fields</span></span>() <span style="color: #990000">::</span> [<span style="color: #009900">Name</span> + | {<span style="color: #009900">Name</span>, <span style="color: #009900">Constraints</span>} + | {<span style="color: #009900">Name</span>, <span style="color: #009900">Constraints</span>, <span style="color: #009900">Default</span>}] + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>() +<span style="color: #009900">Constraints</span> <span style="color: #990000">::</span> <span style="color: #009900">Constraint</span> | [<span style="color: #009900">Constraint</span>] +<span style="color: #009900">Constraint</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_constraints:constraint</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Fields description for match operations.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_http_headers">http_headers()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">http_headers</span></span>() <span style="color: #990000">::</span> #{<span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>HTTP headers.</p></div> +</div> +<div class="sect2"> +<h3 id="_http_status">http_status()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">http_status</span></span>() <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>() | <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>HTTP response status.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_http_version">http_version()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">http_version</span></span>() <span style="color: #990000">::</span> <span style="color: #FF6600">'HTTP/2'</span> | <span style="color: #FF6600">'HTTP/1.1'</span> | <span style="color: #FF6600">'HTTP/1.0'</span></tt></pre></div></div> +<div class="paragraph"><p>HTTP version.</p></div> +<div class="paragraph"><p>Note that semantically, HTTP/1.1 and HTTP/2 are equivalent.</p></div> +</div> +<div class="sect2"> +<h3 id="_opts">opts()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">opts</span></span>() <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">map</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Options for the HTTP/1.1, HTTP/2 and Websocket protocols.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a>, +<a href="../ranch">ranch(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_app/index.html b/docs/en/cowboy/2.2/manual/cowboy_app/index.html new file mode 100644 index 00000000..01e3bbfa --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_app/index.html @@ -0,0 +1,308 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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(7)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy - Small, fast, modern HTTP server for Erlang/OTP</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy is an HTTP server for Erlang/OTP with support for the +HTTP/1.1, HTTP/2 and Websocket protocols.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_modules">Modules</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Functions:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy">cowboy(3)</a> - Listener management +</p> +</li> +<li> +<p> +<a href="../cowboy_req">cowboy_req(3)</a> - Request and response +</p> +</li> +<li> +<p> +<a href="../cowboy_router">cowboy_router(3)</a> - Router +</p> +</li> +<li> +<p> +<a href="../cowboy_constraints">cowboy_constraints(3)</a> - Constraints +</p> +</li> +</ul></div> +<div class="paragraph"><p>Protocols:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_http">cowboy_http(3)</a> - HTTP/1.1 +</p> +</li> +<li> +<p> +<a href="../cowboy_http2">cowboy_http2(3)</a> - HTTP/2 +</p> +</li> +<li> +<p> +<a href="../cowboy_websocket">cowboy_websocket(3)</a> - Websocket +</p> +</li> +</ul></div> +<div class="paragraph"><p>Handlers:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_static">cowboy_static(3)</a> - Static file handler +</p> +</li> +</ul></div> +<div class="paragraph"><p>Behaviors:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_handler">cowboy_handler(3)</a> - Plain HTTP handlers +</p> +</li> +<li> +<p> +<a href="../cowboy_loop">cowboy_loop(3)</a> - Loop handlers +</p> +</li> +<li> +<p> +<a href="../cowboy_middleware">cowboy_middleware(3)</a> - Middlewares +</p> +</li> +<li> +<p> +<a href="../cowboy_rest">cowboy_rest(3)</a> - REST handlers +</p> +</li> +<li> +<p> +<a href="../cowboy_stream">cowboy_stream(3)</a> - Stream handlers +</p> +</li> +<li> +<p> +<a href="../cowboy_websocket">cowboy_websocket(3)</a> - Websocket handlers +</p> +</li> +</ul></div> +<div class="paragraph"><p>Middlewares:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_router">cowboy_router(3)</a> - Router middleware +</p> +</li> +<li> +<p> +<a href="../cowboy_handler">cowboy_handler(3)</a> - Handler middleware +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_dependencies">Dependencies</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="../ranch">ranch(7)</a> - Socket acceptor pool for TCP protocols +</p> +</li> +<li> +<p> +<a href="../cowlib">cowlib(7)</a> - Support library for manipulating Web protocols +</p> +</li> +<li> +<p> +ssl - Secure communication over sockets +</p> +</li> +<li> +<p> +crypto - Crypto functions +</p> +</li> +</ul></div> +<div class="paragraph"><p>All these applications must be started before the <code>cowboy</code> +application. To start Cowboy and all dependencies at once:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">application:ensure_all_started</span></span>(<span style="color: #FF6600">cowboy</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_environment">Environment</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The <code>cowboy</code> application does not define any application +environment configuration parameters.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../ranch">ranch(7)</a>, +<a href="../cowlib">cowlib(7)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_constraints.int/index.html b/docs/en/cowboy/2.2/manual/cowboy_constraints.int/index.html new file mode 100644 index 00000000..75697e1c --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_constraints.int/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_constraints:int(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_constraints:int(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_constraints:int - Integer constraint</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Constraint functions implement a number of different operations.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">int</span></span>(<span style="color: #FF6600">forward</span>, <span style="color: #009900">Bin</span>) <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Int</span>} | {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">not_an_integer</span>} + +<span style="color: #009900">Bin</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() +<span style="color: #009900">Int</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">integer</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Validate and convert the text representation of an integer.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">int</span></span>(<span style="color: #FF6600">reverse</span>, <span style="color: #009900">Int</span>) <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Bin</span>} | {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">not_an_integer</span>}</tt></pre></div></div> +<div class="paragraph"><p>Convert an integer back to its text representation.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">int</span></span>(<span style="color: #FF6600">format_error</span>, <span style="color: #009900">Error</span>) <span style="color: #990000">-></span> <span style="color: #009900">HumanReadable</span> + +<span style="color: #009900">Error</span> <span style="color: #990000">::</span> {<span style="color: #FF6600">not_an_integer</span>, <span style="color: #009900">Bin</span> | <span style="color: #009900">Int</span>} +<span style="color: #009900">HumanReadable</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iolist</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Generate a human-readable error message.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Arguments vary depending on the operation. Constraint +functions always take the operation type as first argument, +and the value as second argument.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The return value varies depending on the operation.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Interface modified to allow for a variety of operations. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Constraint introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This function is not meant to be called directly.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_constraints.nonempty/index.html b/docs/en/cowboy/2.2/manual/cowboy_constraints.nonempty/index.html new file mode 100644 index 00000000..75499eaa --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_constraints.nonempty/index.html @@ -0,0 +1,228 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_constraints:nonempty(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_constraints:nonempty(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_constraints:nonempty - Non-empty constraint</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Constraint functions implement a number of different operations.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">nonempty</span></span>(<span style="color: #FF6600">forward</span> | <span style="color: #FF6600">reverse</span>, <span style="color: #990000"><<>></span>) <span style="color: #990000">-></span> {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">empty</span>}</tt></pre></div></div> +<div class="paragraph"><p>Reject empty values.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">nonempty</span></span>(<span style="color: #FF6600">forward</span> | <span style="color: #FF6600">reverse</span>, <span style="color: #009900">Bin</span>) <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Bin</span>} + +<span style="color: #009900">Bin</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Accept any other binary values.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">nonempty</span></span>(<span style="color: #FF6600">format_error</span>, <span style="color: #009900">Error</span>) <span style="color: #990000">-></span> <span style="color: #009900">HumanReadable</span> + +<span style="color: #009900">Error</span> <span style="color: #990000">::</span> {<span style="color: #FF6600">empty</span>, <span style="color: #009900">Bin</span>} +<span style="color: #009900">HumanReadable</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iolist</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Generate a human-readable error message.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Arguments vary depending on the operation. Constraint +functions always take the operation type as first argument, +and the value as second argument.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The return value varies depending on the operation.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Interface modified to allow for a variety of operations. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Constraint introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This function is not meant to be called directly.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_constraints/index.html b/docs/en/cowboy/2.2/manual/cowboy_constraints/index.html new file mode 100644 index 00000000..ec4ba54b --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_constraints/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 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id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_constraints - Constraints</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_constraints</code> defines the built-in +constraints in Cowboy and provides an interface for +manipulating these constraints.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_exports">Exports</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Built-in constraints:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_constraints.int">cowboy_constraints:int(3)</a> - Integer constraint +</p> +</li> +<li> +<p> +<a href="../cowboy_constraints.nonempty">cowboy_constraints:nonempty(3)</a> - Non-empty constraint +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_types">Types</h2> +<div class="sectionbody"> +<div class="sect2"> +<h3 id="_constraint">constraint()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">constraint</span></span>() <span style="color: #990000">::</span> <span style="color: #FF6600">int</span> | <span style="color: #FF6600">nonempty</span> | <span style="font-weight: bold"><span style="color: #0000FF">fun</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>A constraint function.</p></div> +<div class="paragraph"><p>The atom constraints are built-in, see the corresponding +function in the exports list above.</p></div> +</div> +<div class="sect2"> +<h3 id="_reason">reason()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">reason</span></span>() <span style="color: #990000">::</span> {<span style="font-weight: bold"><span style="color: #000000">constraint</span></span>(), <span style="color: #009900">Reason</span>, <span style="color: #009900">Value</span>} + +<span style="color: #009900">Reason</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Reason for the constraint failure.</p></div> +<div class="paragraph"><p>It includes the constraint function in question, +a machine-readable error reason and the value that +made the constraint fail.</p></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_handler.terminate/index.html b/docs/en/cowboy/2.2/manual/cowboy_handler.terminate/index.html new file mode 100644 index 00000000..e81b1912 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_handler.terminate/index.html @@ -0,0 +1,246 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_handler:terminate(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_handler:terminate(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_handler:terminate - Terminate the handler</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">terminate</span></span>(<span style="color: #009900">Reason</span>, <span style="color: #009900">PartialReq</span>, <span style="color: #009900">State</span>, <span style="color: #009900">Handler</span>) <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> + +<span style="color: #009900">Reason</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">PartialReq</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">map</span></span>() +<span style="color: #009900">State</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Handler</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">module</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Call the optional terminate callback if it is defined.</p></div> +<div class="paragraph"><p>Make sure to use this function at the end of the execution +of modules that implement custom handler behaviors.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Reason +</dt> +<dd> +<p> +Reason for termination. +</p> +</dd> +<dt class="hdlist1"> +PartialReq +</dt> +<dd> +<p> +The Req object. +</p> +<div class="paragraph"><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></div> +</dd> +<dt class="hdlist1"> +State +</dt> +<dd> +<p> +Handler state. +</p> +</dd> +<dt class="hdlist1"> +Handler +</dt> +<dd> +<p> +Handler module. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The atom <code>ok</code> is always returned. It can be safely ignored.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Terminate a handler normally</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_handler:terminate</span></span>(<span style="font-weight: bold"><span style="color: #000080">normal</span></span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, <span style="color: #009900">Handler</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../cowboy_handler">cowboy_handler(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_handler/index.html b/docs/en/cowboy/2.2/manual/cowboy_handler/index.html new file mode 100644 index 00000000..687f67be --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_handler/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_handler(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_handler(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_handler - Plain HTTP handlers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The <code>cowboy_handler</code> middleware executes the handler selected +by the router or any other preceding middleware.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>This module also defines a callback interface for handling +HTTP requests.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_callbacks">Callbacks</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Plain HTTP handlers implement the following interface:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="font-weight: bold"><span style="color: #000000">terminate</span></span>(<span style="color: #009900">Reason</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> <span style="font-style: italic"><span style="color: #9A1900">%% optional</span></span> + +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">State</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Reason</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">normal</span></span> + | {<span style="color: #FF6600">crash</span>, <span style="color: #FF6600">error</span> | <span style="font-weight: bold"><span style="color: #000080">exit</span></span> | <span style="font-weight: bold"><span style="color: #000080">throw</span></span>, <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>These two callbacks are common to all handlers.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following terminate reasons are defined for plain HTTP +handlers:</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +normal +</dt> +<dd> +<p> + The connection was closed normally. +</p> +</dd> +<dt class="hdlist1"> +{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. The function + <code>erlang:get_stacktrace/0</code> can also be called to obtain the + stacktrace of the process when the crash occurred. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_exports">Exports</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The following function should be called by modules implementing +custom handlers to execute the optional terminate callback:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_handler.terminate">cowboy_handler:terminate(3)</a> - Terminate the handler +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_http/index.html b/docs/en/cowboy/2.2/manual/cowboy_http/index.html new file mode 100644 index 00000000..0abfac4f --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_http/index.html @@ -0,0 +1,392 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_http(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=1" 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" 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src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_http(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_http - HTTP/1.1</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_http</code> implements HTTP/1.1 and HTTP/1.0 +as a Ranch protocol.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_options">Options</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">opts</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">connection_type</span> <span style="color: #990000">=></span> <span style="color: #FF6600">worker</span> | <span style="color: #FF6600">supervisor</span>, + <span style="color: #0000FF">env</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_middleware:env</span></span>(), + <span style="color: #0000FF">idle_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #0000FF">inactivity_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #0000FF">max_empty_lines</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">max_header_name_length</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">max_header_value_length</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">max_headers</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">max_keepalive</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">max_method_length</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">max_request_line_length</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">max_skip_body_length</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">middlewares</span> <span style="color: #990000">=></span> [<span style="font-weight: bold"><span style="color: #000000">module</span></span>()], + <span style="color: #0000FF">request_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #000080">shutdown</span><span style="color: #009900">_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #0000FF">stream_handlers</span> <span style="color: #990000">=></span> [<span style="font-weight: bold"><span style="color: #000000">module</span></span>()] +}</tt></pre></div></div> +<div class="paragraph"><p>Configuration for the HTTP/1.1 protocol.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The default value is given next to the option name:</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +connection_type (supervisor) +</dt> +<dd> +<p> + Whether the connection process also acts as a supervisor. +</p> +</dd> +<dt class="hdlist1"> +env (#{}) +</dt> +<dd> +<p> + Middleware environment. +</p> +</dd> +<dt class="hdlist1"> +idle_timeout (60000) +</dt> +<dd> +<p> + Time in ms with no data received before Cowboy closes the connection. +</p> +</dd> +<dt class="hdlist1"> +inactivity_timeout (300000) +</dt> +<dd> +<p> + Time in ms with nothing received at all before Cowboy closes the connection. +</p> +</dd> +<dt class="hdlist1"> +max_empty_lines (5) +</dt> +<dd> +<p> + Maximum number of empty lines before a request. +</p> +</dd> +<dt class="hdlist1"> +max_header_name_length (64) +</dt> +<dd> +<p> + Maximum length of header names. +</p> +</dd> +<dt class="hdlist1"> +max_header_value_length (4096) +</dt> +<dd> +<p> + Maximum length of header values. +</p> +</dd> +<dt class="hdlist1"> +max_headers (100) +</dt> +<dd> +<p> + Maximum number of headers allowed per request. +</p> +</dd> +<dt class="hdlist1"> +max_keepalive (100) +</dt> +<dd> +<p> + Maximum number of requests allowed per connection. +</p> +</dd> +<dt class="hdlist1"> +max_method_length (32) +</dt> +<dd> +<p> + Maximum length of the method. +</p> +</dd> +<dt class="hdlist1"> +max_request_line_length (8000) +</dt> +<dd> +<p> + Maximum length of the request line. +</p> +</dd> +<dt class="hdlist1"> +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 class="hdlist1"> +middlewares ([cowboy_router, cowboy_handler]) +</dt> +<dd> +<p> + Middlewares to run for every request. +</p> +</dd> +<dt class="hdlist1"> +request_timeout (5000) +</dt> +<dd> +<p> + Time in ms with no requests before Cowboy closes the connection. +</p> +</dd> +<dt class="hdlist1"> +shutdown_timeout (5000) +</dt> +<dd> +<p> + Time in ms Cowboy will wait for child processes to shut down before killing them. +</p> +</dd> +<dt class="hdlist1"> +stream_handlers ([cowboy_stream_h]) +</dt> +<dd> +<p> + Ordered list of stream handlers that will handle all stream events. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.2</strong>: The <code>max_skip_body_length</code> option was added. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>timeout</code> option was renamed <code>request_timeout</code>. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>idle_timeout</code>, <code>inactivity_timeout</code> and <code>shutdown_timeout</code> options were added. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>max_method_length</code> option was added. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>max_request_line_length</code> default was increased from 4096 to 8000. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>connection_type</code> option was added. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>env</code> option is now a map instead of a proplist. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>stream_handlers</code> option was added. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>compress</code> option was removed in favor of the <code>cowboy_compress_h</code> stream handler. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Options are now a map instead of a proplist. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Protocol introduced. Replaces <code>cowboy_protocol</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a>, +<a href="../cowboy_http2">cowboy_http2(3)</a>, +<a href="../cowboy_websocket">cowboy_websocket(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_http2/index.html b/docs/en/cowboy/2.2/manual/cowboy_http2/index.html new file mode 100644 index 00000000..4070a2b6 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_http2/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_http2(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_http2(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_http2 - HTTP/2</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_http2</code> implements HTTP/2 +as a Ranch protocol.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_options">Options</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">opts</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">connection_type</span> <span style="color: #990000">=></span> <span style="color: #FF6600">worker</span> | <span style="color: #FF6600">supervisor</span>, + <span style="color: #0000FF">env</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_middleware:env</span></span>(), + <span style="color: #0000FF">inactivity_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #0000FF">middlewares</span> <span style="color: #990000">=></span> [<span style="font-weight: bold"><span style="color: #000000">module</span></span>()], + <span style="color: #0000FF">preface_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #000080">shutdown</span><span style="color: #009900">_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #0000FF">stream_handlers</span> <span style="color: #990000">=></span> [<span style="font-weight: bold"><span style="color: #000000">module</span></span>()] +}</tt></pre></div></div> +<div class="paragraph"><p>Configuration for the HTTP/2 protocol.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The default value is given next to the option name:</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +connection_type (supervisor) +</dt> +<dd> +<p> + Whether the connection process also acts as a supervisor. +</p> +</dd> +<dt class="hdlist1"> +env (#{}) +</dt> +<dd> +<p> + Middleware environment. +</p> +</dd> +<dt class="hdlist1"> +inactivity_timeout (300000) +</dt> +<dd> +<p> + Time in ms with nothing received at all before Cowboy closes the connection. +</p> +</dd> +<dt class="hdlist1"> +middlewares ([cowboy_router, cowboy_handler]) +</dt> +<dd> +<p> + Middlewares to run for every request. +</p> +</dd> +<dt class="hdlist1"> +preface_timeout (5000) +</dt> +<dd> +<p> + Time in ms Cowboy is willing to wait for the connection preface. +</p> +</dd> +<dt class="hdlist1"> +shutdown_timeout (5000) +</dt> +<dd> +<p> + Time in ms Cowboy will wait for child processes to shut down before killing them. +</p> +</dd> +<dt class="hdlist1"> +stream_handlers ([cowboy_stream_h]) +</dt> +<dd> +<p> + Ordered list of stream handlers that will handle all stream events. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Protocol introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</div> +</div> +</div> +</div> + + <footer> + <div class="container"> + <div class="row"> + <div class="span6"> + <p id="scroll-top"><a href="#">↑ Scroll to 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name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_loop(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=1" 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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class="paragraph"><p>cowboy_loop - Loop handlers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_loop</code> defines a callback interface for +long running HTTP connections.</p></div> +<div class="paragraph"><p>You should switch to this behavior for long polling, +server-sent events and similar long-running requests.</p></div> +<div class="paragraph"><p>There are generally two usage patterns:</p></div> +<div class="ulist"><ul> +<li> +<p> +Loop until receiving a specific message, then send + a response and stop execution (for example long polling); +</p> +</li> +<li> +<p> +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). +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_callbacks">Callbacks</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Loop handlers implement the following interface:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">cowboy_loop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + | {<span style="color: #FF6600">cowboy_loop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>} + +<span style="font-weight: bold"><span style="color: #000000">info</span></span>(<span style="color: #009900">Info</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + | {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>} + | {<span style="color: #FF6600">stop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="font-weight: bold"><span style="color: #000000">terminate</span></span>(<span style="color: #009900">Reason</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> <span style="font-style: italic"><span style="color: #9A1900">%% optional</span></span> + +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">State</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Info</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Reason</span> <span style="color: #990000">::</span> <span style="color: #FF6600">stop</span> + | {<span style="color: #FF6600">crash</span>, <span style="color: #FF6600">error</span> | <span style="font-weight: bold"><span style="color: #000080">exit</span></span> | <span style="font-weight: bold"><span style="color: #000080">throw</span></span>, <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following terminate reasons are defined for loop handlers:</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +stop +</dt> +<dd> +<p> + The handler requested to close the connection by returning + a <code>stop</code> tuple. +</p> +</dd> +<dt class="hdlist1"> +{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. The function + <code>erlang:get_stacktrace/0</code> can also be called to obtain the + stacktrace of the process when the crash occurred. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Loop handlers no longer need to handle overflow/timeouts. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Behavior introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a>, +<a href="../cowboy_handler">cowboy_handler(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_middleware/index.html b/docs/en/cowboy/2.2/manual/cowboy_middleware/index.html new file mode 100644 index 00000000..1af792fe --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_middleware/index.html @@ -0,0 +1,252 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_middleware(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_middleware(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_middleware - Middlewares</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_middleware</code> defines a callback interface for +Cowboy middlewares.</p></div> +<div class="paragraph"><p>Middlewares process the request sequentially in the order they +are configured.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_callbacks">Callbacks</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Middlewares implement the following interface:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">execute</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">Env</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">Env</span>} + | {<span style="color: #FF6600">suspend</span>, <span style="font-weight: bold"><span style="color: #000000">module</span></span>(), <span style="font-weight: bold"><span style="color: #000080">atom</span></span>(), [<span style="font-weight: bold"><span style="color: #000000">any</span></span>()]} + | {<span style="color: #FF6600">stop</span>, <span style="color: #009900">Req</span>} + +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">Env</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_middleware:env</span></span>()</tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +ok +</dt> +<dd> +<p> +Cowboy should continue processing the request using the +returned Req object and environment. +</p> +</dd> +<dt class="hdlist1"> +suspend +</dt> +<dd> +<p> +Cowboy will hibernate the process. When resuming, Cowboy +will apply the returned module, function and arguments. +</p> +</dd> +<dt class="hdlist1"> +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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_types">Types</h2> +<div class="sectionbody"> +<div class="sect2"> +<h3 id="_env">env()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">env</span></span>() <span style="color: #990000">::</span> #{<span style="font-weight: bold"><span style="color: #000080">atom</span></span>() <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Middleware environment.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Middlewares may modify the environment as necessary.</p></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: The <code>env</code> type is now a map instead of a proplist. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Behavior introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script 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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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:binding(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:binding - Access a value bound from the route</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">binding</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">binding</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>, <span style="color: #000080">undefined</span>) +<span style="font-weight: bold"><span style="color: #000000">binding</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">Default</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() | <span style="color: #009900">Default</span> + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>() +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the value for the given binding.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Desired binding name as an atom. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Default +</dt> +<dd> +<p> +Default value returned when the binding is missing. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the value is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the username from the path</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% Route is "/users/:user"</span></span> +<span style="color: #009900">Username</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:binding</span></span>(<span style="color: #FF6600">user</span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% Route is "/log[/:branch]"</span></span> +<span style="color: #009900">Branch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:binding</span></span>(<span style="color: #FF6600">branch</span>, <span style="color: #009900">Req</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"master"</span><span style="color: #990000">>></span>)</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.bindings/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.bindings/index.html new file mode 100644 index 00000000..091f3a3c --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.bindings/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:bindings(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:bindings(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:bindings - Access all values bound from the route</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">bindings</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:bindings</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return a map containing all bindings.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the values are returned, they are no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get all bindings</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Bindings</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:bindings</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.body_length/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.body_length/index.html new file mode 100644 index 00000000..5b03c6c4 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.body_length/index.html @@ -0,0 +1,226 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:body_length(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:body_length(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:body_length - Body length</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">body_length</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #000080">undefined</span> | <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the length of the request body.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The length of the request body, or <code>undefined</code> if it is +not known.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the length is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the body length</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Length</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:body_length</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.cert/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.cert/index.html new file mode 100644 index 00000000..f3701296 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.cert/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:cert(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:cert(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:cert - Client TLS certificate</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cert</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #000080">undefined</span></tt></pre></div></div> +<div class="paragraph"><p>Return the peer’s TLS certificate.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:start_tls</span></span>(<span style="color: #FF6600">example</span>, [ + {<span style="color: #FF6600">port</span>, <span style="color: #993399">8443</span>}, + {<span style="color: #FF6600">cert</span>, <span style="color: #FF0000">"path/to/cert.pem"</span>}, + {<span style="color: #FF6600">verify</span>, <span style="color: #FF6600">verify_peer</span>} +], #{ + <span style="color: #0000FF">env</span> <span style="color: #990000">=></span> #{<span style="color: #0000FF">dispatch</span> <span style="color: #990000">=></span> <span style="color: #009900">Dispatch</span>} +})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>You may also want to customize the <code>verify_fun</code> function. Please +consult the <code>ssl</code> application’s manual for more details.</p></div> +<div class="paragraph"><p>TCP connections do not allow a certificate and this function +will therefore always return <code>undefined</code>.</p></div> +<div class="paragraph"><p>The certificate can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">cert</span> <span style="color: #990000">:=</span> <span style="color: #009900">Cert</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The client TLS certificate.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.1</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the client TLS certificate.</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Cert</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:cert</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.delete_resp_header/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.delete_resp_header/index.html new file mode 100644 index 00000000..d0703118 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.delete_resp_header/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:delete_resp_header - Delete a response header</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">delete_resp_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span></tt></pre></div></div> +<div class="paragraph"><p>Delete the given response header.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Header name as a lowercase binary string. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A new Req object is returned.</p></div> +<div class="paragraph"><p>The returned Req object must be used from that point onward, +otherwise the header will still be sent in the response.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Remove the content-type header from the response</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:delete_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>),</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.has_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.has_body/index.html new file mode 100644 index 00000000..ed02f6fe --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.has_body/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:has_body - Is there a request body?</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">has_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return whether the request has a body.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A boolean indicating whether the request has a body.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Ensure the request has a body</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #000080">true</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_body</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_body/index.html new file mode 100644 index 00000000..61ce099a --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_body/index.html @@ -0,0 +1,219 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_resp_body(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:has_resp_body - Is there a response body?</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">has_resp_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return whether a response body has been set.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A boolean indicating whether a response body has been set.</p></div> +<div class="paragraph"><p>This function will return <code>false</code> when an empty response +body has been set.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Check whether a body has been set</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #000080">false</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_resp_body</span></span>(<span style="color: #009900">Req0</span>), +<span style="color: #009900">Req1</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"Hello!"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>), +<span style="color: #000080">true</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_resp_body</span></span>(<span style="color: #009900">Req1</span>), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_body</span></span>(<span style="color: #990000"><<>></span>, <span style="color: #009900">Req1</span>), +<span style="color: #000080">false</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_resp_body</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_header/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_header/index.html new file mode 100644 index 00000000..739ee203 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_header/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:has_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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_resp_header(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:has_resp_header - Is the given response header set?</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">has_resp_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the given response header has been set.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Header name as a lowercase binary string. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A boolean indicating whether the given response header has been set.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Check whether the content-type header has been set</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #000080">false</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"text/html"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>), +<span style="color: #000080">true</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:has_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.header/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.header/index.html new file mode 100644 index 00000000..ba52fcd2 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.header/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:header(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:header - HTTP header</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>, <span style="color: #000080">undefined</span>) +<span style="font-weight: bold"><span style="color: #000000">header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">Default</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #009900">Default</span> + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the value for the given HTTP header.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Headers can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">headers</span> <span style="color: #990000">:=</span> #{<span style="color: #009900">Name</span> <span style="color: #990000">:=</span> <span style="color: #009900">Value</span>}} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>Note that this snippet will crash if the header is missing.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Desired HTTP header name as a lowercase binary string. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Default +</dt> +<dd> +<p> +Default value returned when the header is missing. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The header value is returned as a binary string. When the +header is missing, the default argument is returned.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the header value is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the accept header</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Accept</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"accept"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Length</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-length"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"0"</span><span style="color: #990000">>></span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.headers/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.headers/index.html new file mode 100644 index 00000000..098cfc3d --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.headers/index.html @@ -0,0 +1,227 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:headers(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:headers - HTTP headers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">headers</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return all request headers.</p></div> +<div class="paragraph"><p>Request headers can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">headers</span> <span style="color: #990000">:=</span> <span style="color: #009900">Headers</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Headers are returned as a map with keys being lowercase +binary strings, and values as binary strings.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the headers are returned, they are no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get all headers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Headers</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:headers</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.host/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.host/index.html new file mode 100644 index 00000000..1f6627a8 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.host/index.html @@ -0,0 +1,228 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:host(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:host - URI host name</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">host</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Host</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the host name of the effective request URI.</p></div> +<div class="paragraph"><p>The host name can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">host</span> <span style="color: #990000">:=</span> <span style="color: #009900">Host</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The host name is returned as a lowercase binary string. +It is case insensitive.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the host name is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the effective request URI’s host name</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Host</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:host</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.host_info/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.host_info/index.html new file mode 100644 index 00000000..f23c08dd --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.host_info/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:host_info(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:host_info(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:host_info - Access the route’s heading host segments</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">host_info</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:tokens</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the tokens for the heading host segments.</p></div> +<div class="paragraph"><p>This is the part of the host name that was matched using +the <code>...</code> notation.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The tokens are returned as a list of case insensitive +binary strings.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the tokens are returned, they are no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the host_info tokens</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">HostInfo</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:host_info</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.inform/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.inform/index.html new file mode 100644 index 00000000..406caf4c --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.inform/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:inform(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:inform - Send an informational response</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">inform</span></span>(<span style="color: #009900">Status</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">inform</span></span>(<span style="color: #009900">StatusCode</span>, #{}, <span style="color: #009900">Req</span>) + +<span style="font-weight: bold"><span style="color: #000000">inform</span></span>(<span style="color: #009900">Status</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> + +<span style="color: #009900">Status</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_status</span></span>() +<span style="color: #009900">Headers</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Send an informational response.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Status +</dt> +<dd> +<p> +The status code for the response. +</p> +</dd> +<dt class="hdlist1"> +Headers +</dt> +<dd> +<p> +The response headers. +</p> +</dd> +</dl></div> +<div class="paragraph"><p>Header names must be given as lowercase binary strings.</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The atom <code>ok</code> is always returned. It can be safely ignored.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.1</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Send an informational response</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:inform</span></span>(<span style="color: #993399">102</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Send an informational response with headers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:inform</span></span>(<span style="color: #993399">103</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"link"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"</style.css>; rel=preload; as=style"</span><span style="color: #990000">>></span>, + <span style="color: #990000"><<</span><span style="color: #FF0000">"link"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"</script.js>; rel=preload; as=script"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.match_cookies/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.match_cookies/index.html new file mode 100644 index 00000000..59e955fb --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.match_cookies/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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 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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:match_cookies(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:match_cookies - Match cookies against constraints</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">match_cookies</span></span>(<span style="color: #009900">Fields</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:fields</span></span>(), <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> #{<span style="font-weight: bold"><span style="color: #000080">atom</span></span>() <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Parse the cookies and match specific values against +constraints.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Fields +</dt> +<dd> +<p> +Cookies to retrieve. +</p> +<div class="paragraph"><p>See <a href="../cowboy">cowboy(3)</a> for a complete description.</p></div> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The map contains the same keys that were given in the fields.</p></div> +<div class="paragraph"><p>An exception is triggered when the match fails.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Match fields</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% ID and Lang are binaries.</span></span> +#{<span style="color: #FF6600">id</span> <span style="color: #990000">:=</span> <span style="color: #009900">ID</span>, <span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} + <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_cookies</span></span>([<span style="color: #FF6600">id</span>, <span style="color: #FF6600">lang</span>], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Match fields and apply constraints</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% ID is an integer and Lang a non-empty binary.</span></span> +#{<span style="color: #FF6600">id</span> <span style="color: #990000">:=</span> <span style="color: #009900">ID</span>, <span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} + <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_cookies</span></span>([{<span style="color: #FF6600">id</span>, <span style="color: #FF6600">int</span>}, {<span style="color: #FF6600">lang</span>, <span style="color: #FF6600">nonempty</span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Match fields with default values</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} + <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_cookies</span></span>([{<span style="color: #FF6600">lang</span>, [], <span style="color: #990000"><<</span><span style="color: #FF0000">"en-US"</span><span style="color: #990000">>></span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../cowboy_req">cowboy_req(3)</a>, +<a href="../cowboy_req.parse_cookies">cowboy_req:parse_cookies(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.match_qs/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.match_qs/index.html new file mode 100644 index 00000000..2b1ac37c --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.match_qs/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:match_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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:match_qs(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:match_qs - Match the query string against constraints</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">match_qs</span></span>(<span style="color: #009900">Fields</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:fields</span></span>(), <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> #{<span style="font-weight: bold"><span style="color: #000080">atom</span></span>() <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Parse the query string and match specific values against +constraints.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Fields +</dt> +<dd> +<p> +Fields to retrieve from the query string. +</p> +<div class="paragraph"><p>See <a href="../cowboy">cowboy(3)</a> for a complete description.</p></div> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The map contains the same keys that were given in the fields.</p></div> +<div class="paragraph"><p>An exception is triggered when the match fails.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Match fields</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% ID and Lang are binaries.</span></span> +#{<span style="color: #FF6600">id</span> <span style="color: #990000">:=</span> <span style="color: #009900">ID</span>, <span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} + <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_qs</span></span>([<span style="color: #FF6600">id</span>, <span style="color: #FF6600">lang</span>], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Match fields and apply constraints</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% ID is an integer and Lang a non-empty binary.</span></span> +#{<span style="color: #FF6600">id</span> <span style="color: #990000">:=</span> <span style="color: #009900">ID</span>, <span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} + <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_qs</span></span>([{<span style="color: #FF6600">id</span>, <span style="color: #FF6600">int</span>}, {<span style="color: #FF6600">lang</span>, <span style="color: #FF6600">nonempty</span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Match fields with default values</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">lang</span> <span style="color: #990000">:=</span> <span style="color: #009900">Lang</span>} + <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:match_qs</span></span>([{<span style="color: #FF6600">lang</span>, [], <span style="color: #990000"><<</span><span style="color: #FF0000">"en-US"</span><span style="color: #990000">>></span>}], <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.method/index.html 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data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:method(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:method - HTTP method</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">method</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Method</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the request’s HTTP method.</p></div> +<div class="paragraph"><p>The method can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">method</span> <span style="color: #990000">:=</span> <span style="color: #009900">Method</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The request’s HTTP method is returned as a binary string. +While methods are case sensitive, standard methods are +always uppercase.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the method is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Ensure the request’s method is GET</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #990000"><<</span><span style="color: #FF0000">"GET"</span><span style="color: #990000">>></span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:method</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Allow methods from list</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">lists:member</span></span>(<span style="font-weight: bold"><span style="color: #000000">cowboy_req:method</span></span>(<span style="color: #009900">Req</span>), [<span style="color: #990000"><<</span><span style="color: #FF0000">"GET"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"POST"</span><span style="color: #990000">>></span>]) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + <span style="color: #000080">true</span> <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">handle</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>); + <span style="color: #000080">false</span> <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">method_not_allowed</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../cowboy_req">cowboy_req(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.parse_cookies/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.parse_cookies/index.html new file mode 100644 index 00000000..80d626dc --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.parse_cookies/index.html @@ -0,0 +1,228 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:parse_cookies(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:parse_cookies - Parse cookie headers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_cookies</span></span>(<span style="color: #009900">Req</span>) <span style="color: #990000">-></span> [{<span style="color: #009900">Name</span>, <span style="color: #009900">Value</span>}] + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span></tt></pre></div></div> +<div class="paragraph"><p>Parse cookie headers.</p></div> +<div class="paragraph"><p>Alias for <a href="../cowboy_req.parse_header">cowboy_req:parse_header(<a href="#cookie">[cookie]</a>, Req)</a>.</p></div> +<div class="paragraph"><p>When the cookie header is missing, <code>[]</code> is returned.</p></div> +<div class="paragraph"><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> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The cookies are returned as a list of key/values. Keys and +values are case sensitive binary strings.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the parsed header value is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>cookie/2,3</code> and <code>cookies/1</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Look for a specific cookie</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Cookies</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_cookies</span></span>(<span style="color: #009900">Req</span>), +{<span style="color: #990000">_</span>, <span style="color: #009900">Token</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">lists:keyfind</span></span>(<span style="color: #FF6600">token</span>, <span style="color: #993399">1</span>, <span style="color: #009900">Cookies</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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.match_cookies">cowboy_req:match_cookies(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.parse_header/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.parse_header/index.html new file mode 100644 index 00000000..552040fa --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.parse_header/index.html @@ -0,0 +1,420 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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'> + <link href="/css/99s.css?r=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:parse_header(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:parse_header - Parse the given HTTP header</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> <span style="color: #009900">ParsedValue</span> | <span style="color: #009900">Default</span> +<span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">Default</span>) <span style="color: #990000">-></span> <span style="color: #009900">ParsedValue</span> | <span style="color: #009900">Default</span> + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">ParsedValue</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Parse the given HTTP header.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Desired HTTP header name as a lowercase binary string. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Default +</dt> +<dd> +<p> +Default value returned when the header is missing. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The parsed header value varies depending on the header. +When the header is missing, the default argument is returned.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_headers">Headers</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="title">accept</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"accept"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) + <span style="color: #990000">-></span> [{{<span style="color: #009900">Type</span>, <span style="color: #009900">SubType</span>, <span style="color: #009900">Params</span>}, <span style="color: #009900">Quality</span>, <span style="color: #009900">AcceptExt</span>}] + +<span style="color: #009900">Type</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">SubType</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">Params</span> <span style="color: #990000">::</span> [{<span style="color: #009900">Key</span>, <span style="color: #009900">Value</span>}] +<span style="color: #009900">Quality</span> <span style="color: #990000">::</span> <span style="color: #993399">0</span><span style="color: #990000">..</span><span style="color: #993399">1000</span> +<span style="color: #009900">AcceptExt</span> <span style="color: #990000">::</span> [<span style="color: #009900">Key</span> | {<span style="color: #009900">Key</span>, <span style="color: #009900">Value</span>}] +<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> [{<span style="color: #009900">Value</span>, <span style="color: #009900">Quality</span>}] + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="color: #990000"><<</span><span style="color: #FF0000">"accept-charset"</span><span style="color: #990000">>></span> + | <span style="color: #990000"><<</span><span style="color: #FF0000">"accept-encoding"</span><span style="color: #990000">>></span> + | <span style="color: #990000"><<</span><span style="color: #FF0000">"accept-language"</span><span style="color: #990000">>></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">Quality</span> <span style="color: #990000">::</span> <span style="color: #993399">0</span><span style="color: #990000">..</span><span style="color: #993399">1000</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">authorization</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"authorization"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">basic</span>, <span style="color: #009900">Username</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Password</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()} + | {<span style="color: #FF6600">bearer</span>, <span style="color: #009900">Token</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()} + | {<span style="color: #FF6600">digest</span>, [{<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()}]}</tt></pre></div></div> +<div class="listingblock"> +<div class="title">content-length</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-length"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>When the content-length header is missing, <code>0</code> is returned.</p></div> +<div class="listingblock"> +<div class="title">content-type</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) + <span style="color: #990000">-></span> {<span style="color: #009900">Type</span>, <span style="color: #009900">SubType</span>, <span style="color: #009900">Params</span>} + +<span style="color: #009900">Type</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">SubType</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">Params</span> <span style="color: #990000">::</span> [{<span style="color: #009900">Key</span>, <span style="color: #009900">Value</span>}] +<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive;</span></span></tt></pre></div></div> +<div class="paragraph"><p>Note that the value for the charset parameter is case insensitive +and returned as a lowercase binary string.</p></div> +<div class="listingblock"> +<div class="title">cookie</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"cookie"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> [{<span style="color: #009900">Name</span>, <span style="color: #009900">Value</span>}] + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span></tt></pre></div></div> +<div class="paragraph"><p>When the cookie header is missing, <code>[]</code> is returned.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="title">expect</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"expect"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> <span style="color: #FF6600">continue</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">if-match and if-none-match</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) + <span style="color: #990000">-></span> <span style="color: #FF6600">'*'</span> | [{<span style="color: #FF6600">weak</span> | <span style="color: #FF6600">strong</span>, <span style="color: #009900">OpaqueTag</span>}] + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="color: #990000"><<</span><span style="color: #FF0000">"if-match"</span><span style="color: #990000">>></span> + | <span style="color: #990000"><<</span><span style="color: #FF0000">"if-none-match"</span><span style="color: #990000">>></span> +<span style="color: #009900">OpaqueTag</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">calendar:datetime</span></span>()</tt></pre></div></div> +<div class="listingblock"> +<div class="title">range</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"range"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> {<span style="color: #009900">From</span>, <span style="color: #009900">To</span>} | <span style="color: #009900">Final</span> + +<span style="color: #009900">From</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>() +<span style="color: #009900">To</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>() | <span style="color: #FF6600">infinity</span> +<span style="color: #009900">Final</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">neg_integer</span></span>()</tt></pre></div></div> +<div class="listingblock"> +<div class="title">sec-websocket-extensions</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sec-websocket-extensions"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) + <span style="color: #990000">-></span> [{<span style="color: #009900">Extension</span>, <span style="color: #009900">Params</span>}] + +<span style="color: #009900">Extension</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Params</span> <span style="color: #990000">::</span> [<span style="color: #009900">Key</span> | {<span style="color: #009900">Key</span>, <span style="color: #009900">Value</span>}] +<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">sec-websocket-protocol and upgrade</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> [<span style="color: #009900">Token</span>] + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="color: #990000"><<</span><span style="color: #FF0000">"sec-websocket-protocol"</span><span style="color: #990000">>></span> + | <span style="color: #990000"><<</span><span style="color: #FF0000">"upgrade"</span><span style="color: #990000">>></span> +<span style="color: #009900">Token</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">x-forwarded-for</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"x-forwarded-for"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> [<span style="color: #009900">Token</span>] + +<span style="color: #009900">Token</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Unknown headers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_header</span></span>(<span style="color: #990000">_</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> {<span style="color: #000080">undefined</span>, <span style="color: #009900">RawValue</span>}</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the parsed header value is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Parse the accept header with a custom default value</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% Accept everything when header is missing.</span></span> +<span style="color: #009900">Accept</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"accept"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>, + [{{ <span style="color: #990000"><<</span><span style="color: #FF0000">"*"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"*"</span><span style="color: #990000">>></span>, []}, <span style="color: #993399">1000</span>, []}])<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Parse the content-length header</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% Default content-length is 0.</span></span> +<span style="color: #009900">Length</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-length"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.parse_qs/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.parse_qs/index.html new file mode 100644 index 00000000..8d34dda2 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.parse_qs/index.html @@ -0,0 +1,254 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:parse_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=1" 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 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href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:parse_qs(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:parse_qs - Parse the query string</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">parse_qs</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> [{<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #000080">true</span>}]</tt></pre></div></div> +<div class="paragraph"><p>Parse the query string as a list of key/value pairs.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><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><<"edit">></code> will always have the value <code>true</code>:</p></div> +<div class="ulist"><ul> +<li> +<p> +<code>/posts/42?edit</code> +</p> +</li> +<li> +<p> +<code>/posts/42?edit&exclusive=1</code> +</p> +</li> +<li> +<p> +<code>/posts/42?exclusive=1&edit</code> +</p> +</li> +<li> +<p> +<code>/posts/42?exclusive=1&edit&from=web</code> +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: The parsed value is not longer cached in the Req object. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Only the parsed query string is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>qs_val/1</code> and <code>qs_vals/1</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Parse the query string and convert the keys to atoms</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">ParsedQs</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:parse_qs</span></span>(<span style="color: #009900">Req</span>), +<span style="color: #009900">AtomsQs</span> <span style="color: #990000">=</span> [{<span style="font-weight: bold"><span style="color: #000000">binary_to_existing_atom</span></span>(<span style="color: #009900">K</span>, <span style="color: #FF6600">latin1</span>), <span style="color: #009900">V</span>} + || {<span style="color: #009900">K</span>, <span style="color: #009900">V</span>} <span style="color: #990000"><-</span> <span style="color: #009900">ParsedQs</span>]<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.path/index.html new file mode 100644 index 00000000..3df00f32 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.path/index.html @@ -0,0 +1,227 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:path(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:path(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:path - URI path</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">path</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Path</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the path of the effective request URI.</p></div> +<div class="paragraph"><p>The path can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">path</span> <span style="color: #990000">:=</span> <span style="color: #009900">Path</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The path is returned as a binary string. It is case sensitive.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the path is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the effective request URI’s path</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Path</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:path</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.path_info/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.path_info/index.html new file mode 100644 index 00000000..02371113 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.path_info/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:path_info(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:path_info(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:path_info - Access the route’s trailing path segments</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">path_info</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:tokens</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the tokens for the trailing path segments.</p></div> +<div class="paragraph"><p>This is the part of the host name that was matched using +the <code>...</code> notation.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The tokens are returned as a list of case sensitive +binary strings.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the tokens are returned, they are no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the path_info tokens</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">PathInfo</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:path_info</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.peer/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.peer/index.html new file mode 100644 index 00000000..2972cbd4 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.peer/index.html @@ -0,0 +1,235 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:peer(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:peer(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:peer - Peer address and port</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">peer</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Info</span> + +<span style="color: #009900">Info</span> <span style="color: #990000">::</span> {<span style="font-weight: bold"><span style="color: #000000">inet:ip_address</span></span>(), <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Return the peer’s IP address and port number.</p></div> +<div class="paragraph"><p>The peer information can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">peer</span> <span style="color: #990000">:=</span> {<span style="color: #009900">IP</span>, <span style="color: #009900">Port</span>}} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The peer’s IP address and port number.</p></div> +<div class="paragraph"><p>The peer is not necessarily the client’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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the peer is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the peer IP address and port number.</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #009900">IP</span>, <span style="color: #009900">Port</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:peer</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.port/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.port/index.html new file mode 100644 index 00000000..95a48219 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.port/index.html @@ -0,0 +1,227 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:port(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:port(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:port - URI port number</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">port</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Port</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the port number of the effective request URI.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The port number can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">port</span> <span style="color: #990000">:=</span> <span style="color: #009900">Port</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The port number is returned as an integer.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the port number is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the effective request URI’s port number</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Port</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:port</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../cowboy_req">cowboy_req(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.push/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.push/index.html new file mode 100644 index 00000000..a5f136e5 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.push/index.html @@ -0,0 +1,279 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:push(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:push(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:push - Push a resource to the client</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">push</span></span>(<span style="color: #009900">Path</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">push</span></span>(<span style="color: #009900">Path</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span>, #{}) + +<span style="font-weight: bold"><span style="color: #000000">push</span></span>(<span style="color: #009900">Path</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #009900">Opts</span>) + <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> + +<span style="color: #009900">Path</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Headers</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>() +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:push_opts</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Push a resource to the client.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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’s URI. You can override them by passing options.</p></div> +<div class="paragraph"><p>It is not possible to push resources after sending a response. +Any attempt will result in an error.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Path +</dt> +<dd> +<p> +The status code for the response. +</p> +</dd> +<dt class="hdlist1"> +Headers +</dt> +<dd> +<p> +The response headers. +</p> +</dd> +</dl></div> +<div class="paragraph"><p>Header names must be given as lowercase binary strings.</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Opts +</dt> +<dd> +<p> +Customize the HTTP method or the URI scheme, host, port +or query string. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The atom <code>ok</code> is always returned. It can be safely ignored.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Push a resource</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:push</span></span>(<span style="color: #FF0000">"/static/style.css"</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"accept"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/css"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req</span>),</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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:push</span></span>(<span style="color: #FF0000">"/static/style.css"</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"accept"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/css"</span><span style="color: #990000">>></span> +}, #{<span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"cdn.example.org"</span><span style="color: #990000">>></span>}, <span style="color: #009900">Req</span>),</tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.qs/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.qs/index.html new file mode 100644 index 00000000..eb0af71c --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.qs/index.html @@ -0,0 +1,226 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:qs(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:qs - URI query string</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">qs</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Qs</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the query string of the effective request URI.</p></div> +<div class="paragraph"><p>The query string can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">qs</span> <span style="color: #990000">:=</span> <span style="color: #009900">Qs</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The query string is returned as a binary string. It is case sensitive.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the query string is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the effective request URI’s query string</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Qs</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:qs</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.read_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.read_body/index.html new file mode 100644 index 00000000..6b255d7d --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.read_body/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:read_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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:read_body(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:read_body - Read the request body</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">read_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">read_body</span></span>(<span style="color: #009900">Req</span>, #{}) + +<span style="font-weight: bold"><span style="color: #000000">read_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #009900">Opts</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Req</span>} + | {<span style="color: #FF6600">more</span>, <span style="color: #009900">Data</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Req</span>} + +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body_opts</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Read the request body.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The options therefore are only related to the communication +between the request process and the connection process.</p></div> +<div class="paragraph"><p>Cowboy will automatically handle protocol details including +the expect header, chunked transfer-encoding and others.</p></div> +<div class="paragraph"><p>Once the body has been read fully, Cowboy sets the content-length +header if it was not previously provided.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Opts +</dt> +<dd> +<p> +A map of body reading options. +</p> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A <code>more</code> tuple is returned when there are more data to be read.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The data is always returned as a binary.</p></div> +<div class="paragraph"><p>The Req object returned in the tuple must be used for 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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>body/1,2</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Read the entire body</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">read_body</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">Acc</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #990000"><<</span> <span style="color: #009900">Acc</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="color: #009900">Data</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span> <span style="color: #990000">>></span>, <span style="color: #009900">Req</span>}; + {<span style="color: #FF6600">more</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">read_body</span></span>(<span style="color: #009900">Req</span>, <span style="color: #990000"><<</span> <span style="color: #009900">Acc</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="color: #009900">Data</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span> <span style="color: #990000">>></span>) + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Read the body in small chunks</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body</span></span>(<span style="color: #009900">Req</span>, #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">64000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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_part">cowboy_req:read_part(3)</a>, +<a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.read_part/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.read_part/index.html new file mode 100644 index 00000000..d880e1b2 --- /dev/null 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style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">read_part</span></span>(<span style="color: #009900">Req</span>, #{}) + +<span style="font-weight: bold"><span style="color: #000000">read_part</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #009900">Opts</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span>} | {<span style="color: #FF6600">done</span>, <span style="color: #009900">Req</span>} + +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body_opts</span></span>() +<span style="color: #009900">Headers</span> <span style="color: #990000">::</span> #{<span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Read the next part of a multipart body.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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’t +been read. Both are skipped automatically when calling this +function.</p></div> +<div class="paragraph"><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’s body.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Once a part has been read, it can not be read again.</p></div> +<div class="paragraph"><p>Once the body has been read, Cowboy sets the content-length +header if it was not previously provided.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +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> +<div class="paragraph"><p>This function defaults the <code>length</code> to 64KB and the <code>period</code> +to 5 seconds.</p></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>An <code>ok</code> tuple is returned containing the next part’s headers +as a map.</p></div> +<div class="paragraph"><p>A <code>done</code> tuple is returned if there are no more parts to read.</p></div> +<div class="paragraph"><p>The Req object returned in the tuple must be used for 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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>part/1,2</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Read all parts</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">acc_multipart</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">Acc</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req1</span>} <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Body</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">stream_body</span></span>(<span style="color: #009900">Req1</span>, <span style="color: #990000"><<>></span>), + <span style="font-weight: bold"><span style="color: #000000">acc_multipart</span></span>(<span style="color: #009900">Req</span>, [{<span style="color: #009900">Headers</span>, <span style="color: #009900">Body</span>}|<span style="color: #009900">Acc</span>]); + {<span style="color: #FF6600">done</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + {<span style="font-weight: bold"><span style="color: #000000">lists:reverse</span></span>(<span style="color: #009900">Acc</span>), <span style="color: #009900">Req</span>} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span> + +<span style="font-weight: bold"><span style="color: #000000">stream_body</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">Acc</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part_body</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">more</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">stream_body</span></span>(<span style="color: #009900">Req</span>, <span style="color: #990000"><<</span> <span style="color: #009900">Acc</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="color: #009900">Data</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span> <span style="color: #990000">>></span>); + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #990000"><<</span> <span style="color: #009900">Acc</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="color: #009900">Data</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span> <span style="color: #990000">>></span>, <span style="color: #009900">Req</span>} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Read all part headers, skipping bodies</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">skip_body_multipart</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">Acc</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">skip_body_multipart</span></span>(<span style="color: #009900">Req</span>, [<span style="color: #009900">Headers</span>|<span style="color: #009900">Acc</span>]); + {<span style="color: #FF6600">done</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + {<span style="font-weight: bold"><span style="color: #000000">lists:reverse</span></span>(<span style="color: #009900">Acc</span>), <span style="color: #009900">Req</span>} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part</span></span>(<span style="color: #009900">Req0</span>, #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">1000000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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_body">cowboy_req:read_part_body(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.read_part_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.read_part_body/index.html new file mode 100644 index 00000000..0f0dcb3e --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.read_part_body/index.html @@ -0,0 +1,267 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:read_part_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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:read_part_body(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:read_part_body - Read the current part’s body</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">read_part_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">read_part_body</span></span>(<span style="color: #009900">Req</span>, #{}) + +<span style="font-weight: bold"><span style="color: #000000">read_part_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #009900">Opts</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Req</span>} + | {<span style="color: #FF6600">more</span>, <span style="color: #009900">Data</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Req</span>} + +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body_opts</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Read the body of the current part of the multipart message.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>This function reads a chunk of the part’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></div> +<div class="paragraph"><p>Once a part has been read, it can not be read again.</p></div> +<div class="paragraph"><p>Once the body has been read, Cowboy sets the content-length +header if it was not previously provided.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +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> +<div class="paragraph"><p>This function uses the same default options as the +<a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> +function.</p></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A <code>more</code> tuple is returned when there are more data to be read.</p></div> +<div class="paragraph"><p>An <code>ok</code> tuple is returned when there are no more data to be read.</p></div> +<div class="paragraph"><p>The data is always returned as a binary.</p></div> +<div class="paragraph"><p>The Req object returned in the tuple must be used for 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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>part_body/1,2</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Read a full part’s body</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">stream_body</span></span>(<span style="color: #009900">Req0</span>, <span style="color: #009900">Acc</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part_body</span></span>(<span style="color: #009900">Req0</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + {<span style="color: #FF6600">more</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #000000">stream_body</span></span>(<span style="color: #009900">Req</span>, <span style="color: #990000"><<</span> <span style="color: #009900">Acc</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="color: #009900">Data</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span> <span style="color: #990000">>></span>); + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">-></span> + {<span style="color: #FF6600">ok</span>, <span style="color: #990000"><<</span> <span style="color: #009900">Acc</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="color: #009900">Data</span><span style="color: #990000">/</span><span style="font-weight: bold"><span style="color: #000080">binary</span></span> <span style="color: #990000">>></span>, <span style="color: #009900">Req</span>} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Ensure a part’s body is smaller than 64KB</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">Body</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_part_body</span></span>(<span style="color: #009900">Req0</span>, #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">64000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.read_urlencoded_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.read_urlencoded_body/index.html new file mode 100644 index 00000000..081cfd40 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.read_urlencoded_body/index.html @@ -0,0 +1,263 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:read_urlencoded_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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:read_urlencoded_body(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:read_urlencoded_body - Read and parse a urlencoded request body</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">read_urlencoded_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">read_urlencoded_body</span></span>(<span style="color: #009900">Req</span>, #{}) + +<span style="font-weight: bold"><span style="color: #000000">read_urlencoded_body</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #009900">Opts</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Body</span>, <span style="color: #009900">Req</span>} + +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_body_opts</span></span>() +<span style="color: #009900">Body</span> <span style="color: #990000">::</span> [{<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #000080">true</span>}]</tt></pre></div></div> +<div class="paragraph"><p>Read and parse a urlencoded request body.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The urlencoded media type is used by Web browsers when +submitting HTML forms using the POST method.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy will automatically handle protocol details including +the expect header, chunked transfer-encoding and others.</p></div> +<div class="paragraph"><p>Once the body has been read, Cowboy sets the content-length +header if it was not previously provided.</p></div> +<div class="paragraph"><p>This function can only be called once. Calling it again will +result in undefined behavior.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +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> +<div class="paragraph"><p>This function defaults the <code>length</code> to 64KB and the <code>period</code> +to 5 seconds.</p></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>An <code>ok</code> tuple is returned containing a list of key/values found +in the body.</p></div> +<div class="paragraph"><p>The Req object returned in the tuple must be used for 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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>body_qs/1,2</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Read a urlencoded body</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">Body</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_urlencoded_body</span></span>(<span style="color: #009900">Req0</span>), +{<span style="color: #990000">_</span>, <span style="color: #009900">Lang</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">lists:keyfind</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"lang"</span><span style="color: #990000">>></span>, <span style="color: #993399">1</span>, <span style="color: #009900">Body</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Allow large urlencoded bodies</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #009900">Body</span>, <span style="color: #009900">Req</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:read_urlencoded_body</span></span>(<span style="color: #009900">Req0</span>, #{<span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="color: #993399">1000000</span>})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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_part">cowboy_req:read_part(3)</a>, +<a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.reply/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.reply/index.html new file mode 100644 index 00000000..9a3b486d --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.reply/index.html @@ -0,0 +1,302 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:reply(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:reply - Send the response</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">reply</span></span>(<span style="color: #009900">Status</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">reply</span></span>(<span style="color: #009900">StatusCode</span>, #{}, <span style="color: #009900">Req</span>) + +<span style="font-weight: bold"><span style="color: #000000">reply</span></span>(<span style="color: #009900">Status</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="font-weight: bold"><span style="color: #000000">reply</span></span>(<span style="color: #009900">Status</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Body</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="color: #009900">Status</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_status</span></span>() +<span style="color: #009900">Headers</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>() +<span style="color: #009900">Body</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_body</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Send the response.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> +instead of this function to set cookies.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Status +</dt> +<dd> +<p> +The status code for the response. +</p> +</dd> +<dt class="hdlist1"> +Headers +</dt> +<dd> +<p> +The response headers. +</p> +</dd> +</dl></div> +<div class="paragraph"><p>Header names must be given as lowercase binary strings.</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +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 class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A new Req object is returned.</p></div> +<div class="paragraph"><p>The returned Req object should be used from that point onward +as it contains updated information about the state of the request.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the Req is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Reply</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">404</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Reply with custom headers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">401</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"www-authenticate"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"Basic realm=\"erlang.org\""</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span> +}, <span style="color: #FF0000">"Hello world!"</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.resp_header/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.resp_header/index.html new file mode 100644 index 00000000..b57277dc --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.resp_header/index.html @@ -0,0 +1,250 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:resp_header(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:resp_header - Response header</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">resp_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">resp_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>, <span style="color: #000080">undefined</span>) +<span style="font-weight: bold"><span style="color: #000000">resp_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">Default</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #009900">Default</span> + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the value for the given response header.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Desired response header name as a lowercase binary string. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Default +</dt> +<dd> +<p> +Default value returned when the header is missing. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The header value is returned as a binary string. When the +header is missing, the default argument is returned.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the content-type response header</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Type</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Type</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req</span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"text/html"</span><span style="color: #990000">>></span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.resp_headers/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.resp_headers/index.html new file mode 100644 index 00000000..f995dbb7 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.resp_headers/index.html @@ -0,0 +1,216 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req: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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:resp_headers(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:resp_headers - Response headers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">resp_headers</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return all response headers.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Headers are returned as a map with keys being lowercase +binary strings, and values as binary strings.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get all response headers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Headers</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_headers</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.scheme/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.scheme/index.html new file mode 100644 index 00000000..43716750 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.scheme/index.html @@ -0,0 +1,226 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:scheme(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:scheme - URI scheme</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">scheme</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Scheme</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the scheme of the effective request URI.</p></div> +<div class="paragraph"><p>The scheme can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">scheme</span> <span style="color: #990000">:=</span> <span style="color: #009900">Scheme</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The scheme is returned as a binary. It is case insensitive.</p></div> +<div class="paragraph"><p>Cowboy will only set the scheme to <code><<"http">></code> or <code><<"https">></code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Redirect HTTP to HTTPS</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req0</span><span style="color: #990000">=</span>#{<span style="color: #FF6600">scheme</span> <span style="color: #990000">:=</span> <span style="color: #990000"><<</span><span style="color: #FF0000">"http"</span><span style="color: #990000">>></span>}, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:reply</span></span>(<span style="color: #993399">302</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"location"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"https"</span><span style="color: #990000">>></span>}) + }, <span style="color: #009900">Req0</span>), + {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}; +<span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">cowboy_rest</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../cowboy_req">cowboy_req(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_body/index.html new file mode 100644 index 00000000..a2174bb6 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_body/index.html @@ -0,0 +1,275 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_body(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:set_resp_body - Set the response body</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">set_resp_body</span></span>(<span style="color: #009900">Body</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="color: #009900">Body</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_body</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Set the response body.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +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 class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A new Req object is returned.</p></div> +<div class="paragraph"><p>The returned Req object must be used from that point onward, +otherwise the body will not be sent in the response.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: The function now accepts a <code>sendfile</code> tuple. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The <code>set_resp_body_fun/2,3</code> functions were removed. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Set the response body</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"Hello world!"</span><span style="color: #990000">>></span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_body</span></span>([ + <span style="color: #FF0000">"<html><head><title>"</span>, + <span style="font-weight: bold"><span style="color: #000000">page_title</span></span>(), + <span style="color: #FF0000">"</title></head><body>"</span>, + <span style="font-weight: bold"><span style="color: #000000">page_body</span></span>(), + <span style="color: #FF0000">"</body></html>"</span> +], <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #008080">#file_info</span>{<span style="font-weight: bold"><span style="color: #000080">size</span></span><span style="color: #990000">=</span><span style="color: #009900">Size</span>}} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">file:read_file_info</span></span>(<span style="color: #009900">Filename</span>), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_body</span></span>({<span style="color: #FF6600">sendfile</span>, <span style="color: #993399">0</span>, <span style="color: #009900">Size</span>, <span style="color: #009900">Filename</span>}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Clear any previously set response body</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_body</span></span>(<span style="color: #990000"><<>></span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_cookie/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_cookie/index.html new file mode 100644 index 00000000..e44817f0 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_cookie/index.html @@ -0,0 +1,304 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_cookie(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:set_resp_cookie - Set a cookie</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">set_resp_cookie</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Value</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">set_resp_cookie</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Value</span>, [], <span style="color: #009900">Req</span>) + +<span style="font-weight: bold"><span style="color: #000000">set_resp_cookie</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Value</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #009900">Opts</span>) + <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cow_cookie:cookie_opts</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Set a cookie to be sent with the response.</p></div> +<div class="paragraph"><p>Note that cookie names are case sensitive.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Cookie name. +</p> +</dd> +<dt class="hdlist1"> +Value +</dt> +<dd> +<p> +Cookie value. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Opts +</dt> +<dd> +<p> +Cookie options. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A new Req object is returned.</p></div> +<div class="paragraph"><p>The returned Req object must be used from that point onward, +otherwise the cookie will not be sent in the response.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: <code>set_resp_cookie/3</code> introduced as an alias to <code>set_resp_cookie/4</code> with no options. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The first argument type is now <code>binary()</code> instead of <code>iodata()</code>. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Set a session cookie</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">base64:encode</span></span>(<span style="font-weight: bold"><span style="color: #000000">crypto:strong_rand_bytes</span></span>(<span style="color: #993399">32</span>)), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"lang"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"fr-FR"</span><span style="color: #990000">>></span>, + <span style="color: #009900">Req0</span>, #{<span style="color: #0000FF">max_age</span> <span style="color: #990000">=></span> <span style="color: #993399">3600</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Delete a cookie</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<>></span>, + <span style="color: #009900">Req0</span>, #{<span style="color: #0000FF">max_age</span> <span style="color: #990000">=></span> <span style="color: #993399">0</span>})<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"inaccount"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"1"</span><span style="color: #990000">>></span>, + <span style="color: #009900">Req0</span>, #{<span style="color: #0000FF">domain</span> <span style="color: #990000">=></span> <span style="color: #FF0000">"my.example.org"</span>, <span style="color: #0000FF">path</span> <span style="color: #990000">=></span> <span style="color: #FF0000">"/account"</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Restrict a cookie to HTTPS</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">base64:encode</span></span>(<span style="font-weight: bold"><span style="color: #000000">crypto:strong_rand_bytes</span></span>(<span style="color: #993399">32</span>)), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, + <span style="color: #009900">Req0</span>, #{<span style="color: #0000FF">secure</span> <span style="color: #990000">=></span> <span style="color: #000080">true</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Restrict a cookie to HTTP</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">SessionID</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">base64:encode</span></span>(<span style="font-weight: bold"><span style="color: #000000">crypto:strong_rand_bytes</span></span>(<span style="color: #993399">32</span>)), +<span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_cookie</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"sessionid"</span><span style="color: #990000">>></span>, <span style="color: #009900">SessionID</span>, + <span style="color: #009900">Req0</span>, #{<span style="color: #0000FF">http_only</span> <span style="color: #990000">=></span> <span style="color: #000080">true</span>})<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_header/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_header/index.html new file mode 100644 index 00000000..a44e3735 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_header/index.html @@ -0,0 +1,258 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_header(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:set_resp_header - Set a response header</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">set_resp_header</span></span>(<span style="color: #009900">Name</span>, <span style="color: #009900">Value</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="color: #009900">Name</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> +<span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case depends on header</span></span></tt></pre></div></div> +<div class="paragraph"><p>Set a header to be sent with the response.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy does not allow duplicate header names. Headers set +by this function may be overwritten by those set from the +reply functions.</p></div> +<div class="paragraph"><p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> +instead of this function to set cookies.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Name +</dt> +<dd> +<p> +Header name as a lowercase binary string. +</p> +</dd> +<dt class="hdlist1"> +Value +</dt> +<dd> +<p> +Header value. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A new Req object is returned.</p></div> +<div class="paragraph"><p>The returned Req object must be used from that point onward, +otherwise the header will not be sent in the response.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Set a header in the response</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"allow"</span><span style="color: #990000">>></span>, <span style="color: #FF0000">"GET"</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Construct a header using iolists</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_header</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"allow"</span><span style="color: #990000">>></span>, + [<span style="font-weight: bold"><span style="color: #000000">allowed_methods</span></span>(), <span style="color: #FF0000">", OPTIONS"</span>], <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_headers/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_headers/index.html new file mode 100644 index 00000000..7802eea9 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_headers/index.html @@ -0,0 +1,246 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:set_resp_headers - Set several response headers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">set_resp_headers</span></span>(<span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="color: #009900">Headers</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Set several headers to be sent with the response.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> +instead of this function to set cookies.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Headers +</dt> +<dd> +<p> +Headers as a map with keys being lowercase binary strings, +and values as binary strings. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A new Req object is returned.</p></div> +<div class="paragraph"><p>The returned Req object must be used from that point onward, +otherwise the headers will not be sent in the response.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Set several response headers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_headers</span></span>(#{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/html"</span><span style="color: #990000">>></span>, + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-encoding"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"gzip"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.sock/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.sock/index.html new file mode 100644 index 00000000..3fe258de --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.sock/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:sock(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:sock(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:sock - Socket address and port</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">sock</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Info</span> + +<span style="color: #009900">Info</span> <span style="color: #990000">::</span> {<span style="font-weight: bold"><span style="color: #000000">inet:ip_address</span></span>(), <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Return the socket’s IP address and port number.</p></div> +<div class="paragraph"><p>The socket information can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">sock</span> <span style="color: #990000">:=</span> {<span style="color: #009900">IP</span>, <span style="color: #009900">Port</span>}} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The socket’s local IP address and port number.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.1</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the socket’s IP address and port number.</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #009900">IP</span>, <span style="color: #009900">Port</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:sock</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.stream_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.stream_body/index.html new file mode 100644 index 00000000..a80ad2ee --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.stream_body/index.html @@ -0,0 +1,256 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:stream_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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:stream_body(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:stream_body - Stream the response body</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">stream_body</span></span>(<span style="color: #009900">Data</span>, <span style="color: #009900">IsFin</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> + +<span style="color: #009900">Data</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() +<span style="color: #009900">IsFin</span> <span style="color: #990000">::</span> <span style="color: #FF6600">fin</span> | <span style="color: #FF6600">nofin</span></tt></pre></div></div> +<div class="paragraph"><p>Stream the response body.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>You do not need to handle HEAD requests specifically as +Cowboy will ensure no data is sent when you call this function.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Data +</dt> +<dd> +<p> +The data to be sent. +</p> +</dd> +<dt class="hdlist1"> +IsFin +</dt> +<dd> +<p> +A flag indicating whether this is the final piece of data +to be sent. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The atom <code>ok</code> is always returned. It can be safely ignored.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>chunk/2</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Stream the response body</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"Hello\n"</span><span style="color: #990000">>></span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>), +<span style="font-weight: bold"><span style="color: #000000">timer:sleep</span></span>(<span style="color: #993399">1000</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"World!\n"</span><span style="color: #990000">>></span>, <span style="color: #FF6600">fin</span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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_trailers">cowboy_req:stream_trailers(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.stream_reply/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.stream_reply/index.html new file mode 100644 index 00000000..a1f355fb --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.stream_reply/index.html @@ -0,0 +1,289 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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'> + <link href="/css/99s.css?r=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:stream_reply(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:stream_reply - Send the response headers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">stream_reply</span></span>(<span style="color: #009900">Status</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">stream_reply</span></span>(<span style="color: #009900">StatusCode</span>, #{}, <span style="color: #009900">Req</span>) + +<span style="font-weight: bold"><span style="color: #000000">stream_reply</span></span>(<span style="color: #009900">Status</span>, <span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) + <span style="color: #990000">-></span> <span style="color: #009900">Req</span> + +<span style="color: #009900">Status</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_status</span></span>() +<span style="color: #009900">Headers</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Send the response headers.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> +instead of this function to set cookies.</p></div> +<div class="paragraph"><p>If a response body was set before calling this function, +it will not be sent.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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. HTTP/1.0 will send the body +unmodified and close the connection at the end if no +content-length was set.</p></div> +<div class="paragraph"><p>It is not possible to push resources after this function +returns. Any attempt will result in an error.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Status +</dt> +<dd> +<p> +The status code for the response. +</p> +</dd> +<dt class="hdlist1"> +Headers +</dt> +<dd> +<p> +The response headers. +</p> +</dd> +</dl></div> +<div class="paragraph"><p>Header names must be given as lowercase binary strings.</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>A new Req object is returned.</p></div> +<div class="paragraph"><p>The returned Req object must be used from that point onward +in order to be able to stream the response body.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the Req is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>chunked_reply/1,2</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Initiate the response</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_reply</span></span>(<span style="color: #993399">200</span>, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Stream the response with custom headers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"Hello\n"</span><span style="color: #990000">>></span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>), +<span style="font-weight: bold"><span style="color: #000000">timer:sleep</span></span>(<span style="color: #993399">1000</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"World!\n"</span><span style="color: #990000">>></span>, <span style="color: #FF6600">fin</span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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_trailers">cowboy_req:stream_trailers(3)</a>, +<a href="../cowboy_req.push">cowboy_req:push(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.stream_trailers/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.stream_trailers/index.html new file mode 100644 index 00000000..f9c0f794 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.stream_trailers/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:stream_trailers(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:stream_trailers(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:stream_trailers - Send the response trailers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">stream_trailers</span></span>(<span style="color: #009900">Trailers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> + +<span style="color: #009900">Trailers</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Send the response trailers and terminate the stream.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>You must list all field names sent in trailers in the +trailer header, otherwise they might be dropped by intermediaries +or clients.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Trailers +</dt> +<dd> +<p> +Trailer field values to be sent. +</p> +</dd> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The atom <code>ok</code> is always returned. It can be safely ignored.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.2</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Stream a response body with trailers</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_reply</span></span>(<span style="color: #993399">200</span>, #{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/plain"</span><span style="color: #990000">>></span>, + <span style="color: #990000"><<</span><span style="color: #FF0000">"trailer"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"expires, content-md5"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req0</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"Hello\n"</span><span style="color: #990000">>></span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>), +<span style="font-weight: bold"><span style="color: #000000">timer:sleep</span></span>(<span style="color: #993399">1000</span>), +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_body</span></span>(<span style="color: #990000"><<</span><span style="color: #FF0000">"World!\n"</span><span style="color: #990000">>></span>, <span style="color: #FF6600">nofin</span>, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span> +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:stream_trailers</span></span>(#{ + <span style="color: #990000"><<</span><span style="color: #FF0000">"expires"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"Sun, 10 Dec 2017 19:13:47 GMT"</span><span style="color: #990000">>></span>, + <span style="color: #990000"><<</span><span style="color: #FF0000">"content-md5"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"fbf68a8e34b2ded53bba54e68794b4fe"</span><span style="color: #990000">>></span> +}, <span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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_reply">cowboy_req:stream_body(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.uri/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.uri/index.html new file mode 100644 index 00000000..8a914cf5 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.uri/index.html @@ -0,0 +1,314 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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'> + <link href="/css/99s.css?r=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:uri(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:uri - Reconstructed URI</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">uri</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">uri</span></span>(<span style="color: #009900">Req</span>, #{}) +<span style="font-weight: bold"><span style="color: #000000">uri</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #009900">Opts</span>) <span style="color: #990000">-></span> <span style="color: #009900">URI</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() + +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>, + <span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>, + <span style="color: #0000FF">port</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>() | <span style="color: #000080">undefined</span>, + <span style="color: #0000FF">path</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>, + <span style="color: #0000FF">qs</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>, + <span style="color: #0000FF">fragment</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span> +}</tt></pre></div></div> +<div class="paragraph"><p>Reconstruct the effective request URI, optionally modifying components.</p></div> +<div class="paragraph"><p>By default Cowboy will build a URI using the components found +in the request. Options allow disabling or replacing individual +components.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +<dt class="hdlist1"> +Opts +</dt> +<dd> +<p> +Map for overriding individual components. +</p> +<div class="paragraph"><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></div> +<div class="paragraph"><p>As this function always returns a valid URI, there are some +things to note:</p></div> +<div class="ulist"><ul> +<li> +<p> +Disabling the host also disables the scheme and port. +</p> +</li> +<li> +<p> +There is no fragment component by default as these are + not sent with the request. +</p> +</li> +<li> +<p> +The port number may not appear in the resulting URI if + it is the default port for the given scheme (http: 80; https: 443). +</p> +</li> +</ul></div> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The reconstructed URI is returned as an iolist or a binary string.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Individual components can be replaced or disabled. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Only the URI is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: Function introduced. Replaces <code>host_url/1</code> and <code>url/1</code>. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="title">Protocol relative form</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% //example.org/path/to/res?edit=1</span></span> +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% </span></span><span style="text-decoration: underline"><span style="color: #0000FF">http://example.org</span></span> +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">path</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>, <span style="color: #0000FF">qs</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% /path/to/res?edit=1</span></span> +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Add a fragment to the URI</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% </span></span><span style="text-decoration: underline"><span style="color: #0000FF">http://example.org/path/to/res</span></span><span style="font-style: italic"><span style="color: #9A1900">?edit=1#errors</span></span> +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">fragment</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"errors"</span><span style="color: #990000">>></span>})<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Ensure the scheme is HTTPS</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-style: italic"><span style="color: #9A1900">%% </span></span><span style="text-decoration: underline"><span style="color: #0000FF">https://example.org/path/to/res</span></span><span style="font-style: italic"><span style="color: #9A1900">?edit=1</span></span> +<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"https"</span><span style="color: #990000">>></span>})<span style="color: #990000">.</span></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 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">iolist_to_binary</span></span>(<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>))<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.version/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.version/index.html new file mode 100644 index 00000000..f1837f51 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req.version/index.html @@ -0,0 +1,225 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req:version(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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:version(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req:version - HTTP version</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">version</span></span>(<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="color: #009900">Version</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_version</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Return the HTTP version used for the request.</p></div> +<div class="paragraph"><p>The version can also be obtained using pattern matching:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>#{<span style="color: #FF6600">version</span> <span style="color: #990000">:=</span> <span style="color: #009900">Version</span>} <span style="color: #990000">=</span> <span style="color: #009900">Req</span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Req +</dt> +<dd> +<p> +The Req object. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The HTTP version used for the request is returned as an +atom. It is provided for informative purposes only.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Only the version is returned, it is no longer wrapped in a tuple. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Get the HTTP version</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Version</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:version</span></span>(<span style="color: #009900">Req</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../cowboy_req">cowboy_req(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_req/index.html b/docs/en/cowboy/2.2/manual/cowboy_req/index.html new file mode 100644 index 00000000..cf2a53e3 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_req/index.html @@ -0,0 +1,551 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_req(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_req - HTTP request and response</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_req</code> provides functions to access, manipulate +and respond to requests.</p></div> +<div class="paragraph"><p>There are four types of functions in this module. They can be +differentiated by their name and their return type:</p></div> +<div class="tableblock"> +<table rules="all" +width="100%" +frame="border" +cellspacing="0" cellpadding="4"> +<col width="33%" /> +<col width="33%" /> +<col width="33%" /> +<thead> +<tr> +<th align="left" valign="top"> Type </th> +<th align="left" valign="top"> Name pattern </th> +<th align="left" valign="top"> Return type</th> +</tr> +</thead> +<tbody> +<tr> +<td align="left" valign="top"><p class="table">access</p></td> +<td align="left" valign="top"><p class="table">no verb, parse_*, match_*</p></td> +<td align="left" valign="top"><p class="table"><code>Value</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">question</p></td> +<td align="left" valign="top"><p class="table">has_*</p></td> +<td align="left" valign="top"><p class="table"><code>boolean()</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">modification</p></td> +<td align="left" valign="top"><p class="table">set_*</p></td> +<td align="left" valign="top"><p class="table"><code>Req</code></p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">action</p></td> +<td align="left" valign="top"><p class="table">any other verb</p></td> +<td align="left" valign="top"><p class="table"><code>ok | {Result, Value, Req}</code></p></td> +</tr> +</tbody> +</table> +</div> +<div class="paragraph"><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’s only possible to send one response, +and to read the body once.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_exports">Exports</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Connection:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_req.peer">cowboy_req:peer(3)</a> - Peer address and port +</p> +</li> +<li> +<p> +<a href="../cowboy_req.sock">cowboy_req:sock(3)</a> - Socket address and port +</p> +</li> +<li> +<p> +<a href="../cowboy_req.cert">cowboy_req:cert(3)</a> - Client TLS certificate +</p> +</li> +</ul></div> +<div class="paragraph"><p>Raw request:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_req.method">cowboy_req:method(3)</a> - HTTP method +</p> +</li> +<li> +<p> +<a href="../cowboy_req.version">cowboy_req:version(3)</a> - HTTP version +</p> +</li> +<li> +<p> +<a href="../cowboy_req.scheme">cowboy_req:scheme(3)</a> - URI scheme +</p> +</li> +<li> +<p> +<a href="../cowboy_req.host">cowboy_req:host(3)</a> - URI host name +</p> +</li> +<li> +<p> +<a href="../cowboy_req.port">cowboy_req:port(3)</a> - URI port number +</p> +</li> +<li> +<p> +<a href="../cowboy_req.path">cowboy_req:path(3)</a> - URI path +</p> +</li> +<li> +<p> +<a href="../cowboy_req.qs">cowboy_req:qs(3)</a> - URI query string +</p> +</li> +<li> +<p> +<a href="../cowboy_req.uri">cowboy_req:uri(3)</a> - Reconstructed URI +</p> +</li> +<li> +<p> +<a href="../cowboy_req.header">cowboy_req:header(3)</a> - HTTP header +</p> +</li> +<li> +<p> +<a href="../cowboy_req.headers">cowboy_req:headers(3)</a> - HTTP headers +</p> +</li> +</ul></div> +<div class="paragraph"><p>Processed request:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_req.parse_qs">cowboy_req:parse_qs(3)</a> - Parse the query string +</p> +</li> +<li> +<p> +<a href="../cowboy_req.match_qs">cowboy_req:match_qs(3)</a> - Match the query string against constraints +</p> +</li> +<li> +<p> +<a href="../cowboy_req.parse_header">cowboy_req:parse_header(3)</a> - Parse the given HTTP header +</p> +</li> +<li> +<p> +<a href="../cowboy_req.parse_cookies">cowboy_req:parse_cookies(3)</a> - Parse cookie headers +</p> +</li> +<li> +<p> +<a href="../cowboy_req.match_cookies">cowboy_req:match_cookies(3)</a> - Match cookies against constraints +</p> +</li> +<li> +<p> +<a href="../cowboy_req.binding">cowboy_req:binding(3)</a> - Access a value bound from the route +</p> +</li> +<li> +<p> +<a href="../cowboy_req.bindings">cowboy_req:bindings(3)</a> - Access all values bound from the route +</p> +</li> +<li> +<p> +<a href="../cowboy_req.host_info">cowboy_req:host_info(3)</a> - Access the route’s heading host segments +</p> +</li> +<li> +<p> +<a href="../cowboy_req.path_info">cowboy_req:path_info(3)</a> - Access the route’s trailing path segments +</p> +</li> +</ul></div> +<div class="paragraph"><p>Request body:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_req.has_body">cowboy_req:has_body(3)</a> - Is there a request body? +</p> +</li> +<li> +<p> +<a href="../cowboy_req.body_length">cowboy_req:body_length(3)</a> - Body length +</p> +</li> +<li> +<p> +<a href="../cowboy_req.read_body">cowboy_req:read_body(3)</a> - Read the request body +</p> +</li> +<li> +<p> +<a href="../cowboy_req.read_urlencoded_body">cowboy_req:read_urlencoded_body(3)</a> - Read and parse a urlencoded request body +</p> +</li> +<li> +<p> +<a href="../cowboy_req.read_part">cowboy_req:read_part(3)</a> - Read the next multipart headers +</p> +</li> +<li> +<p> +<a href="../cowboy_req.read_part_body">cowboy_req:read_part_body(3)</a> - Read the current part’s body +</p> +</li> +</ul></div> +<div class="paragraph"><p>Response:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a> - Set a cookie +</p> +</li> +<li> +<p> +<a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a> - Set a response header +</p> +</li> +<li> +<p> +<a href="../cowboy_req.set_resp_headers">cowboy_req:set_resp_headers(3)</a> - Set several response headers +</p> +</li> +<li> +<p> +<a href="../cowboy_req.has_resp_header">cowboy_req:has_resp_header(3)</a> - Is the given response header set? +</p> +</li> +<li> +<p> +<a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a> - Response header +</p> +</li> +<li> +<p> +<a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a> - Response headers +</p> +</li> +<li> +<p> +<a href="../cowboy_req.delete_resp_header">cowboy_req:delete_resp_header(3)</a> - Delete a response header +</p> +</li> +<li> +<p> +<a href="../cowboy_req.set_resp_body">cowboy_req:set_resp_body(3)</a> - Set the response body +</p> +</li> +<li> +<p> +<a href="../cowboy_req.has_resp_body">cowboy_req:has_resp_body(3)</a> - Is there a response body? +</p> +</li> +<li> +<p> +<a href="../cowboy_req.inform">cowboy_req:inform(3)</a> - Send an informational response +</p> +</li> +<li> +<p> +<a href="../cowboy_req.reply">cowboy_req:reply(3)</a> - Send the response +</p> +</li> +<li> +<p> +<a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a> - Send the response headers +</p> +</li> +<li> +<p> +<a href="../cowboy_req.stream_body">cowboy_req:stream_body(3)</a> - Stream the response body +</p> +</li> +<li> +<p> +<a href="../cowboy_req.stream_trailers">cowboy_req:stream_trailers(3)</a> - Send the response trailers +</p> +</li> +<li> +<p> +<a href="../cowboy_req.push">cowboy_req:push(3)</a> - Push a resource to the client +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_types">Types</h2> +<div class="sectionbody"> +<div class="sect2"> +<h3 id="_push_opts">push_opts()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">push_opts</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">method</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> + <span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> + <span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> + <span style="color: #0000FF">port</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>(), + <span style="color: #0000FF">qs</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +}</tt></pre></div></div> +<div class="paragraph"><p>Push options.</p></div> +<div class="paragraph"><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’s URI.</p></div> +</div> +<div class="sect2"> +<h3 id="_read_body_opts">read_body_opts()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">read_body_opts</span></span>() <span style="color: #990000">::</span> #{ + <span style="font-weight: bold"><span style="color: #000080">length</span></span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">period</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>(), + <span style="color: #0000FF">timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>() +}</tt></pre></div></div> +<div class="paragraph"><p>Body reading options.</p></div> +<div class="paragraph"><p>The defaults are function-specific.</p></div> +</div> +<div class="sect2"> +<h3 id="_req">req()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">req</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #FF6600">method</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> + <span style="color: #FF6600">version</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_version</span></span>() | <span style="font-weight: bold"><span style="color: #000080">atom</span></span>(), + <span style="color: #FF6600">scheme</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> + <span style="color: #FF6600">host</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> + <span style="color: #FF6600">port</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>(), + <span style="color: #FF6600">path</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> + <span style="color: #FF6600">qs</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> + <span style="color: #FF6600">headers</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>(), + <span style="color: #FF6600">peer</span> <span style="color: #990000">:=</span> {<span style="font-weight: bold"><span style="color: #000000">inet:ip_address</span></span>(), <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>()}, + <span style="color: #FF6600">sock</span> <span style="color: #990000">:=</span> {<span style="font-weight: bold"><span style="color: #000000">inet:ip_address</span></span>(), <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>()}, + <span style="color: #FF6600">cert</span> <span style="color: #990000">:=</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #000080">undefined</span> +}</tt></pre></div></div> +<div class="paragraph"><p>The Req object.</p></div> +<div class="paragraph"><p>Contains information about the request and response. While +some fields are publicly documented, others aren’t and shouldn’t +be used.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="title">Setting a custom field</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Req</span>#{<span style="color: #009900">_myapp_auth_method</span> <span style="color: #990000">=></span> <span style="color: #FF6600">pubkey</span>}<span style="color: #990000">.</span></tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="_resp_body">resp_body()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">resp_body</span></span>() <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() + | {<span style="color: #FF6600">sendfile</span>, <span style="color: #009900">Offset</span>, <span style="color: #009900">Length</span>, <span style="color: #009900">Filename</span>} + +<span style="color: #009900">Offset</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>() +<span style="color: #009900">Length</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>() +<span style="color: #009900">Filename</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">file:name_all</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Response body.</p></div> +<div class="paragraph"><p>It can take two forms: the actual data to be sent or a +tuple indicating which file to send.</p></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="title">Example iolists usage</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #993399">1</span><span style="color: #990000">></span> <span style="color: #009900">RespBody</span> <span style="color: #990000">=</span> [<span style="color: #FF0000">"Hello "</span>, [<span style="color: #990000"><<</span><span style="color: #FF0000">"world"</span><span style="color: #990000">>></span>, <span style="color: #FF0000">$!</span>]]<span style="color: #990000">.</span> +[<span style="color: #FF0000">"Hello "</span>,[<span style="color: #990000"><<</span><span style="color: #FF0000">"world"</span><span style="color: #990000">>></span>,<span style="color: #993399">33</span>]] +<span style="color: #993399">2</span><span style="color: #990000">></span> <span style="font-weight: bold"><span style="color: #000000">io:format</span></span>(<span style="color: #FF0000">"~s~n"</span>, [<span style="color: #009900">RespBody</span>])<span style="color: #990000">.</span> +<span style="color: #009900">Hello</span> <span style="color: #FF6600">world</span><span style="color: #990000">!</span></tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_rest/index.html b/docs/en/cowboy/2.2/manual/cowboy_rest/index.html new file mode 100644 index 00000000..09737d78 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_rest/index.html @@ -0,0 +1,807 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_rest(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_rest(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_rest - REST handlers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_rest</code> implements the HTTP state machine.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_callbacks">Callbacks</h2> +<div class="sectionbody"> +<div class="paragraph"><p>REST handlers implement the following interface:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">cowboy_rest</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Callback</span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) + <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + | {<span style="color: #FF6600">stop</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + | {{<span style="color: #FF6600">switch_handler</span>, <span style="color: #009900">Module</span>}, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + | {{<span style="color: #FF6600">switch_handler</span>, <span style="color: #009900">Module</span>, <span style="color: #009900">Opts</span>}, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="font-weight: bold"><span style="color: #000000">terminate</span></span>(<span style="color: #009900">Reason</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> <span style="font-style: italic"><span style="color: #9A1900">%% optional</span></span> + +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">State</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Module</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">module</span></span>() +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Reason</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">normal</span></span> + | {<span style="color: #FF6600">crash</span>, <span style="color: #FF6600">error</span> | <span style="font-weight: bold"><span style="color: #000080">exit</span></span> | <span style="font-weight: bold"><span style="color: #000080">throw</span></span>, <span style="font-weight: bold"><span style="color: #000000">any</span></span>()} + +<span style="color: #009900">Callback</span> <span style="color: #990000">-</span> <span style="color: #FF6600">see</span> <span style="color: #FF6600">below</span> +<span style="color: #009900">Result</span> <span style="color: #990000">-</span> <span style="color: #FF6600">see</span> <span style="color: #FF6600">below</span> +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">see</span> <span style="color: #FF6600">below</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following terminate reasons are defined for loop handlers:</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +normal +</dt> +<dd> +<p> + The handler terminated normally. +</p> +</dd> +<dt class="hdlist1"> +{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. The function + <code>erlang:get_stacktrace/0</code> can also be called to obtain the + stacktrace of the process when the crash occurred. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_rest_callbacks">REST callbacks</h2> +<div class="sectionbody"> +<div class="sect2"> +<h3 id="_acceptcallback">AcceptCallback</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">AcceptCallback</span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span> | {<span style="color: #000080">true</span>, <span style="color: #009900">URI</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} | <span style="color: #000080">false</span>} +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">crash</span></tt></pre></div></div> +<div class="paragraph"><p>Process the request body.</p></div> +<div class="paragraph"><p>This function should create or update the resource using the +request body.</p></div> +<div class="paragraph"><p>For PUT requests, the body is a representation of the resource +that is being created or replaced.</p></div> +<div class="paragraph"><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>{true, URI}</code> +with <code>URI</code> the new location.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_allowed_methods">allowed_methods</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">allowed_methods</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> [<span style="font-weight: bold"><span style="color: #000080">binary</span></span>()] <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> [<span style="color: #990000"><<</span><span style="color: #FF0000">"GET"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"HEAD"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"OPTIONS"</span><span style="color: #990000">>></span>]</tt></pre></div></div> +<div class="paragraph"><p>Return the list of allowed methods.</p></div> +</div> +<div class="sect2"> +<h3 id="_allow_missing_post">allow_missing_post</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">allow_missing_post</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether POST is allowed when the resource doesn’t exist.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_charsets_provided">charsets_provided</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">charsets_provided</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> [<span style="font-weight: bold"><span style="color: #000080">binary</span></span>()] <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">skip</span> <span style="color: #FF6600">this</span> <span style="color: #FF6600">step</span></tt></pre></div></div> +<div class="paragraph"><p>Return the list of charsets the resource provides in order +of preference.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy will add the negotiated <code>charset</code> to the Req object +after this step completes:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">req</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">charset</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> +}</tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="_content_types_accepted">content_types_accepted</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">content_types_accepted</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> [{<span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #009900">ParsedMime</span>, <span style="color: #009900">AcceptCallback</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>()}] +<span style="color: #009900">ParsedMime</span> <span style="color: #990000">::</span> {<span style="color: #009900">Type</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">SubType</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #FF6600">'*'</span> | <span style="color: #009900">Params</span>} +<span style="color: #009900">Params</span> <span style="color: #990000">::</span> [{<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()}] + +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">crash</span></tt></pre></div></div> +<div class="paragraph"><p>Return the list of media types the resource accepts in +order of preference.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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>'*'</code>.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_content_types_provided">content_types_provided</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">content_types_provided</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> [{<span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #009900">ParsedMime</span>, <span style="color: #009900">ProvideCallback</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>()}] +<span style="color: #009900">ParsedMime</span> <span style="color: #990000">::</span> {<span style="color: #009900">Type</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">SubType</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #FF6600">'*'</span> | <span style="color: #009900">Params</span>} +<span style="color: #009900">Params</span> <span style="color: #990000">::</span> [{<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()}] + +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> [{{ <span style="color: #990000"><<</span><span style="color: #FF0000">"text"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"html"</span><span style="color: #990000">>></span>, <span style="color: #FF6600">'*'</span>}, <span style="color: #FF6600">to_html</span>}]</tt></pre></div></div> +<div class="paragraph"><p>Return the list of media types the resource provides in +order of preference.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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>'*'</code>.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy will add the negotiated <code>media_type</code> to the Req object +after this step completes:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">req</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">media_type</span> <span style="color: #990000">=></span> <span style="color: #009900">ParsedMime</span> +}</tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="_delete_completed">delete_completed</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">delete_completed</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the resource has been fully deleted from the +system, including from any internal cache.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_delete_resource">delete_resource</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">delete_resource</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Delete the resource.</p></div> +<div class="paragraph"><p>Cowboy will send an error response when this function +returns <code>false</code>.</p></div> +</div> +<div class="sect2"> +<h3 id="_expires">expires</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">expires</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">calendar:datetime</span></span>() | <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #000080">undefined</span> +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">undefined</span></tt></pre></div></div> +<div class="paragraph"><p>Return the resource’s expiration date.</p></div> +</div> +<div class="sect2"> +<h3 id="_forbidden">forbidden</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">forbidden</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether access to the resource is forbidden.</p></div> +<div class="paragraph"><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’t be repeated.</p></div> +</div> +<div class="sect2"> +<h3 id="_generate_etag">generate_etag</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">generate_etag</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | {<span style="color: #FF6600">weak</span> | <span style="color: #FF6600">strong</span>, <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()} +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">no</span> <span style="color: #FF6600">etag</span> <span style="color: #FF6600">value</span></tt></pre></div></div> +<div class="paragraph"><p>Return the entity tag of the resource.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_is_authorized">is_authorized</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">is_authorized</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span> | {<span style="color: #000080">false</span>, <span style="color: #009900">AuthHeader</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #000080">true</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the user is authorized to perform the action.</p></div> +<div class="paragraph"><p>This function should be used to perform any necessary +authentication of the user before attempting to perform +any action on the resource.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_is_conflict">is_conflict</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">is_conflict</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the PUT request results in a conflict.</p></div> +<div class="paragraph"><p>A <em>409 Conflict</em> response is sent when <code>true</code>.</p></div> +</div> +<div class="sect2"> +<h3 id="_known_methods">known_methods</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">known_methods</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> [<span style="font-weight: bold"><span style="color: #000080">binary</span></span>()] <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> [<span style="color: #990000"><<</span><span style="color: #FF0000">"GET"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"HEAD"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"POST"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"PUT"</span><span style="color: #990000">>></span>, + <span style="color: #990000"><<</span><span style="color: #FF0000">"PATCH"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"DELETE"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"OPTIONS"</span><span style="color: #990000">>></span>]</tt></pre></div></div> +<div class="paragraph"><p>Return the list of known methods.</p></div> +<div class="paragraph"><p>The full list of methods known by the server should be +returned, regardless of their use in the resource.</p></div> +<div class="paragraph"><p>The default value lists the methods Cowboy knows and +implement in <code>cowboy_rest</code>.</p></div> +</div> +<div class="sect2"> +<h3 id="_languages_provided">languages_provided</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">languages_provided</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> [<span style="font-weight: bold"><span style="color: #000080">binary</span></span>()] <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">skip</span> <span style="color: #FF6600">this</span> <span style="color: #FF6600">step</span></tt></pre></div></div> +<div class="paragraph"><p>Return the list of languages the resource provides in order +of preference.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy will add the negotiated <code>language</code> to the Req object +after this step completes:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">req</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">language</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> +}</tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="_last_modified">last_modified</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">last_modified</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">calendar:datetime</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">no</span> <span style="color: #FF6600">last</span> <span style="color: #FF6600">modified</span> <span style="color: #FF6600">value</span></tt></pre></div></div> +<div class="paragraph"><p>Return the resource’s last modification date.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_malformed_request">malformed_request</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">malformed_request</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the request is malformed.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_moved_permanently">moved_permanently</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">moved_permanently</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> {<span style="color: #000080">true</span>, <span style="color: #009900">URI</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} | <span style="color: #000080">false</span> +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the resource was permanently moved, and +what its new location is.</p></div> +</div> +<div class="sect2"> +<h3 id="_moved_temporarily">moved_temporarily</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">moved_temporarily</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> {<span style="color: #000080">true</span>, <span style="color: #009900">URI</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} | <span style="color: #000080">false</span> +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the resource was temporarily moved, and +what its new location is.</p></div> +</div> +<div class="sect2"> +<h3 id="_multiple_choices">multiple_choices</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">multiple_choices</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the client should engage in reactive +negotiation.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_options">options</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">options</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>}</tt></pre></div></div> +<div class="paragraph"><p>Respond to an OPTIONS request.</p></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_previously_existed">previously_existed</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">previously_existed</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the resource existed previously.</p></div> +</div> +<div class="sect2"> +<h3 id="_providecallback">ProvideCallback</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">ProvideCallback</span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_body</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">-</span> <span style="color: #FF6600">crash</span></tt></pre></div></div> +<div class="paragraph"><p>Return the response body.</p></div> +<div class="paragraph"><p>The response body can be provided either as the actual data +to be sent or a tuple indicating which file to send.</p></div> +<div class="paragraph"><p>This function is called for both GET and HEAD requests. For +the latter the body is not sent, however.</p></div> +<div class="paragraph"><p>Note that there used to be a way to stream the response body. +It was temporarily removed and will be added back in a later +release.</p></div> +</div> +<div class="sect2"> +<h3 id="_resource_exists">resource_exists</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">resource_exists</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the resource exists.</p></div> +</div> +<div class="sect2"> +<h3 id="_service_available">service_available</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">service_available</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the service is available.</p></div> +<div class="paragraph"><p>A <em>503 Service Unavailable</em> response will be sent when this +function returns <code>false</code>.</p></div> +</div> +<div class="sect2"> +<h3 id="_uri_too_long">uri_too_long</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">uri_too_long</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">false</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the requested URI is too long.</p></div> +<div class="paragraph"><p>This function can be used to further restrict the length +of the URI for this specific resource.</p></div> +</div> +<div class="sect2"> +<h3 id="_valid_content_headers">valid_content_headers</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">valid_content_headers</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the content headers are valid.</p></div> +<div class="paragraph"><p>This callback can be used to reject requests that have +invalid content header values, for example an unsupported +content-encoding.</p></div> +</div> +<div class="sect2"> +<h3 id="_valid_entity_length">valid_entity_length</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">valid_entity_length</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>() +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> <span style="color: #000080">true</span></tt></pre></div></div> +<div class="paragraph"><p>Return whether the request body length is within acceptable boundaries.</p></div> +<div class="paragraph"><p>A <em>413 Request Entity Too Large</em> response will be sent if this +function returns <code>false</code>.</p></div> +</div> +<div class="sect2"> +<h3 id="_variances">variances</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">variances</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Result</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Result</span> <span style="color: #990000">::</span> [<span style="font-weight: bold"><span style="color: #000080">binary</span></span>()] <span style="font-style: italic"><span style="color: #9A1900">%% case insensitive</span></span> +<span style="color: #009900">Default</span> <span style="color: #990000">::</span> []</tt></pre></div></div> +<div class="paragraph"><p>Return the list of request headers that affect the +representation of the resource.</p></div> +<div class="paragraph"><p>Cowboy automatically adds the accept, accept-charset and +accept-language headers when necessary. It’s also useful +to note that some standard headers also do not need to be +listed here, like the authorization header.</p></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.1</strong>: The <code>switch_handler</code> return value was added. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Behavior introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a>, +<a href="../cowboy_handler">cowboy_handler(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.2/manual/cowboy_router.compile/index.html new file mode 100644 index 00000000..f97dc498 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_router.compile/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_router:compile(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_router:compile(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_router:compile - Compile routes to the resources</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">compile</span></span>(<span style="font-weight: bold"><span style="color: #000000">cowboy_router:routes</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:dispatch_rules</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Compile routes to the resources.</p></div> +<div class="paragraph"><p>Takes a human readable list of routes and transforms it +into a form more efficient to process.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_arguments">Arguments</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +Routes +</dt> +<dd> +<p> +Human readable list of routes. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_value">Return value</h2> +<div class="sectionbody"> +<div class="paragraph"><p>An opaque dispatch rules value is returned. This value +must be given to Cowboy as a middleware environment value.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Function introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Compile routes and start a listener</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #009900">Dispatch</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_router:compile</span></span>([ + {<span style="color: #FF6600">'_'</span>, [ + {<span style="color: #FF0000">"/"</span>, <span style="color: #FF6600">toppage_h</span>, []}, + {<span style="color: #FF0000">"/[...], cowboy_static, {priv_dir, my_example_app, ""}}</span> +<span style="color: #FF0000"> ]}</span> +<span style="color: #FF0000">]),</span> + +<span style="color: #FF0000">{ok, _} = cowboy:start_clear(example, [{port, 8080}], #{</span> +<span style="color: #FF0000"> env => #{dispatch => Dispatch}</span> +<span style="color: #FF0000">}).</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="../cowboy_router">cowboy_router(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_router/index.html b/docs/en/cowboy/2.2/manual/cowboy_router/index.html new file mode 100644 index 00000000..c2df9e7f --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_router/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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <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'> + <link href="/css/99s.css?r=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_router(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_router - Router middleware</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The <code>cowboy_router</code> middleware maps the requested host and +path to the handler to be used for processing the request.</p></div> +<div class="paragraph"><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.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_exports">Exports</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_router.compile">cowboy_router:compile(3)</a> - Compile routes to the resources +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_types">Types</h2> +<div class="sectionbody"> +<div class="sect2"> +<h3 id="_bindings">bindings()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">bindings</span></span>() <span style="color: #990000">::</span> #{<span style="font-weight: bold"><span style="color: #000080">atom</span></span>() <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Bindings found during routing.</p></div> +</div> +<div class="sect2"> +<h3 id="_dispatch_rules">dispatch_rules()</h3> +<div class="paragraph"><p>Opaque type containing the compiled routes.</p></div> +</div> +<div class="sect2"> +<h3 id="_routes">routes()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">routes</span></span>() <span style="color: #990000">=</span> [ + {<span style="color: #009900">Host</span>, <span style="color: #009900">PathList</span>} | + {<span style="color: #009900">Host</span>, <span style="color: #009900">Fields</span>, <span style="color: #009900">PathList</span>} +] + +<span style="color: #009900">PathList</span> <span style="color: #990000">::</span> [ + {<span style="color: #009900">Path</span>, <span style="color: #009900">Handler</span>, <span style="color: #009900">InitialState</span>} | + {<span style="color: #009900">Path</span>, <span style="color: #009900">Fields</span>, <span style="color: #009900">Handler</span>, <span style="color: #009900">InitialState</span>} +] + +<span style="color: #009900">Host</span> <span style="color: #990000">::</span> <span style="color: #FF6600">'_'</span> | <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() +<span style="color: #009900">Path</span> <span style="color: #990000">::</span> <span style="color: #FF6600">'_'</span> | <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() +<span style="color: #009900">Fields</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:fields</span></span>() +<span style="color: #009900">Handler</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">module</span></span>() +<span style="color: #009900">InitialState</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Human readable list of routes to handlers.</p></div> +<div class="paragraph"><p>Cowboy uses this list to map hosts and paths, optionally +augmented with constraints applied to the bindings, to +handler modules.</p></div> +<div class="paragraph"><p>The syntax for routes is currently defined in the user guide.</p></div> +</div> +<div class="sect2"> +<h3 id="_tokens">tokens()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">tokens</span></span>() <span style="color: #990000">::</span> [<span style="font-weight: bold"><span style="color: #000080">binary</span></span>()]</tt></pre></div></div> +<div class="paragraph"><p>List of <code>host_info</code> and <code>path_info</code> tokens that were found +using the <code>...</code> syntax.</p></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_static/index.html b/docs/en/cowboy/2.2/manual/cowboy_static/index.html new file mode 100644 index 00000000..3b921539 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_static/index.html @@ -0,0 +1,312 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_static(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_static(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_static - Static file handler</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_static</code> implements file serving capabilities +using the REST semantics provided by <code>cowboy_rest</code>.</p></div> +<div class="paragraph"><p>The static file handler is a pre-written handler coming with +Cowboy. To serve files, use it in your routes.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_options">Options</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">opts</span></span>() <span style="color: #990000">::</span> {<span style="color: #FF6600">priv_file</span>, <span style="color: #009900">App</span>, <span style="color: #009900">Path</span>} + | {<span style="color: #FF6600">priv_file</span>, <span style="color: #009900">App</span>, <span style="color: #009900">Path</span>, <span style="color: #009900">Extra</span>} + | {<span style="color: #FF6600">file</span>, <span style="color: #009900">Path</span>} + | {<span style="color: #FF6600">file</span>, <span style="color: #009900">Path</span>, <span style="color: #009900">Extra</span>} + | {<span style="color: #FF6600">priv_dir</span>, <span style="color: #009900">App</span>, <span style="color: #009900">Path</span>} + | {<span style="color: #FF6600">priv_dir</span>, <span style="color: #009900">App</span>, <span style="color: #009900">Path</span>, <span style="color: #009900">Extra</span>} + | {<span style="color: #FF6600">dir</span>, <span style="color: #009900">Path</span>} + | {<span style="color: #FF6600">dir</span>, <span style="color: #009900">Path</span>, <span style="color: #009900">Extra</span>} + +<span style="color: #009900">App</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>() +<span style="color: #009900">Path</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="font-weight: bold"><span style="color: #000000">string</span></span>() +<span style="color: #009900">Extra</span> <span style="color: #990000">::</span> [<span style="color: #009900">Etag</span> | <span style="color: #009900">Mimetypes</span>] + +<span style="color: #009900">Etag</span> <span style="color: #990000">::</span> {<span style="color: #FF6600">etag</span>, <span style="font-weight: bold"><span style="color: #000000">module</span></span>(), <span style="font-weight: bold"><span style="color: #000080">function</span></span>()} + | {<span style="color: #FF6600">etag</span>, <span style="color: #000080">false</span>} + +<span style="color: #009900">Mimetypes</span> <span style="color: #990000">::</span> {<span style="color: #FF6600">mimetypes</span>, <span style="font-weight: bold"><span style="color: #000000">module</span></span>(), <span style="font-weight: bold"><span style="color: #000080">function</span></span>()} + | {<span style="color: #FF6600">mimetypes</span>, <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() | <span style="color: #009900">ParsedMime</span>} + +<span style="color: #009900">ParsedMime</span> <span style="color: #990000">::</span> {<span style="color: #009900">Type</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">SubType</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Params</span>} +<span style="color: #009900">Params</span> <span style="color: #990000">::</span> [{<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()}]</tt></pre></div></div> +<div class="paragraph"><p>Static handler configuration.</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +priv_file +</dt> +<dd> +<p> +Send a file. +</p> +<div class="paragraph"><p>The path is relative to the given application’s private +directory.</p></div> +</dd> +<dt class="hdlist1"> +file +</dt> +<dd> +<p> +Send a file. +</p> +<div class="paragraph"><p>The path is either absolute or relative to the Erlang node’s +current directory.</p></div> +</dd> +<dt class="hdlist1"> +priv_dir +</dt> +<dd> +<p> +Recursively serve files from a directory. +</p> +<div class="paragraph"><p>The path is relative to the given application’s private +directory.</p></div> +</dd> +<dt class="hdlist1"> +dir +</dt> +<dd> +<p> +Recursively serve files from a directory. +</p> +<div class="paragraph"><p>The path is either absolute or relative to the Erlang node’s +current directory.</p></div> +</dd> +</dl></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">generate_etag</span></span>(<span style="color: #009900">Path</span>, <span style="color: #009900">Size</span>, <span style="color: #009900">Mtime</span>) <span style="color: #990000">-></span> {<span style="color: #FF6600">strong</span> | <span style="color: #FF6600">weak</span>, <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()} + +<span style="color: #009900">Path</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() +<span style="color: #009900">Size</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">non_neg_integer</span></span>() +<span style="color: #009900">Mtime</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">file:date_time</span></span>()</tt></pre></div></div> +<div class="paragraph"><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> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">detect_mimetype</span></span>(<span style="color: #009900">Path</span>) <span style="color: #990000">-></span> <span style="color: #009900">ParsedMime</span> + +<span style="color: #009900">Path</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() +<span style="color: #009900">ParsedMime</span> <span style="color: #990000">::</span> {<span style="color: #009900">Type</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">SubType</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Params</span>} +<span style="color: #009900">Params</span> <span style="color: #990000">::</span> [{<span style="color: #009900">Key</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="color: #009900">Value</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()}]</tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The MIME type function should return +<code>{<<"application">>, <<"octet-stream">>, []}</code> +when it fails to detect a file’s MIME type.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>1.0</strong>: Handler introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">Examples</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="title">Custom etag function</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">generate_etag</span></span>(<span style="color: #009900">Path</span>, <span style="color: #009900">Size</span>, <span style="color: #009900">Mtime</span>) <span style="color: #990000">-></span> + {<span style="color: #FF6600">strong</span>, <span style="font-weight: bold"><span style="color: #000000">integer_to_binary</span></span>( + <span style="font-weight: bold"><span style="color: #000000">erlang:phash2</span></span>({<span style="color: #009900">Path</span>, <span style="color: #009900">Size</span>, <span style="color: #009900">Mtime</span>}, <span style="color: #993399">16#ffffffff</span>))}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="listingblock"> +<div class="title">Custom MIME type function</div> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">always_octet_stream</span></span>(<span style="color: #009900">_Path</span>) <span style="color: #990000">-></span> + <span style="font-weight: bold"><span style="color: #0000FF">case</span></span> <span style="font-weight: bold"><span style="color: #000000">filename:extension</span></span>(<span style="color: #009900">Path</span>) <span style="font-weight: bold"><span style="color: #0000FF">of</span></span> + <span style="color: #990000"><<</span><span style="color: #FF0000">".erl"</span><span style="color: #990000">>></span> <span style="color: #990000">-></span> {<span style="color: #990000"><<</span><span style="color: #FF0000">"text"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"plain"</span><span style="color: #990000">>></span>, []}; + <span style="color: #990000">_</span> <span style="color: #990000">-></span> {<span style="color: #990000"><<</span><span style="color: #FF0000">"application"</span><span style="color: #990000">>></span>, <span style="color: #990000"><<</span><span style="color: #FF0000">"octet-stream"</span><span style="color: #990000">>></span>, []} + <span style="font-weight: bold"><span style="color: #0000FF">end</span></span><span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a>, +<a href="../cowboy_router">cowboy_router(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/cowboy_stream/index.html b/docs/en/cowboy/2.2/manual/cowboy_stream/index.html new file mode 100644 index 00000000..1a565ef0 --- /dev/null +++ b/docs/en/cowboy/2.2/manual/cowboy_stream/index.html @@ -0,0 +1,564 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: cowboy_stream(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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_stream(3)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy_handler - Stream handlers</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The module <code>cowboy_stream</code> defines a callback interface +and a protocol for handling HTTP streams.</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>Cowboy calls the stream handler for nearly all events +related to a stream. Exceptions vary depending on the +protocol.</p></div> +<div class="paragraph"><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 omit them.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_callbacks">Callbacks</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Stream handlers must implement the following interface:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">StreamID</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">Opts</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Commands</span>, <span style="color: #009900">State</span>} +<span style="font-weight: bold"><span style="color: #000000">data</span></span>(<span style="color: #009900">StreamID</span>, <span style="color: #009900">IsFin</span>, <span style="color: #009900">Data</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Commands</span>, <span style="color: #009900">State</span>} +<span style="font-weight: bold"><span style="color: #000000">info</span></span>(<span style="color: #009900">StreamID</span>, <span style="color: #009900">Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> {<span style="color: #009900">Commands</span>, <span style="color: #009900">State</span>} +<span style="font-weight: bold"><span style="color: #000000">terminate</span></span>(<span style="color: #009900">StreamID</span>, <span style="color: #009900">Reason</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="font-weight: bold"><span style="color: #000000">early_error</span></span>(<span style="color: #009900">StreamID</span>, <span style="color: #009900">Reason</span>, <span style="color: #009900">PartialReq</span>, <span style="color: #009900">Resp</span>, <span style="color: #009900">Opts</span>) <span style="color: #990000">-></span> <span style="color: #009900">Resp</span> + +<span style="color: #009900">StreamID</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_stream:streamid</span></span>() +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:opts</span></span>() +<span style="color: #009900">Commands</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_stream:commands</span></span>() +<span style="color: #009900">State</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">IsFin</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_stream:fin</span></span>() +<span style="color: #009900">Data</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>() +<span style="color: #009900">Info</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Reason</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_stream:reason</span></span>() +<span style="color: #009900">PartialReq</span> <span style="color: #990000">-</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>(), <span style="color: #FF6600">except</span> <span style="color: #FF6600">all</span> <span style="color: #FF6600">fields</span> <span style="color: #FF6600">are</span> <span style="color: #FF6600">optional</span> +<span style="color: #009900">Resp</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_stream:resp_command</span></span>()</tt></pre></div></div> +<div class="paragraph"><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 throuh the +stream handler using the normal callbacks.</p></div> +<div class="paragraph"><p>HTTP/2 will initialize the stream when the <code>HEADERS</code> block has +been fully received and decoded. Any protocol error occuring +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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="commands">Commands</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following commands are defined:</p></div> +<div class="sect2"> +<h3 id="response_command">response</h3> +<div class="paragraph"><p>Send a response to the client.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">response</span>, <span style="font-weight: bold"><span style="color: #000000">cowboy:http_status</span></span>(), <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>(), + <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_body</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>No more data can be sent after this command.</p></div> +</div> +<div class="sect2"> +<h3 id="headers_command">headers</h3> +<div class="paragraph"><p>Initiate a response to the client.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">headers</span>, <span style="font-weight: bold"><span style="color: #000000">cowboy:http_status</span></span>(), <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()}</tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="data_command">data</h3> +<div class="paragraph"><p>Send data to the client.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">data</span>, <span style="font-weight: bold"><span style="color: #000000">fin</span></span>(), <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()}</tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="trailers_command">trailers</h3> +<div class="paragraph"><p>Send response trailers to the client.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">trailers</span>, <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()}</tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="push_command">push</h3> +<div class="paragraph"><p>Push a resource to the client.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">push</span>, <span style="color: #009900">Method</span>, <span style="color: #009900">Scheme</span>, <span style="color: #009900">Host</span>, <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>(), + <span style="color: #009900">Path</span>, <span style="color: #009900">Qs</span>, <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()} + +<span style="color: #009900">Method</span> <span style="color: #990000">=</span> <span style="color: #009900">Scheme</span> <span style="color: #990000">=</span> <span style="color: #009900">Host</span> <span style="color: #990000">=</span> <span style="color: #009900">Path</span> <span style="color: #990000">=</span> <span style="color: #009900">Qs</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>The command will be ignored if the protocol does not provide +any server push mechanism.</p></div> +</div> +<div class="sect2"> +<h3 id="_flow">flow</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">flow</span>, <span style="font-weight: bold"><span style="color: #000000">pos_integer</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>Request more data to be read from the request body. The +exact behavior depends on the protocol.</p></div> +</div> +<div class="sect2"> +<h3 id="_spawn">spawn</h3> +<div class="paragraph"><p>Inform Cowboy that a process was spawned and should be +supervised.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="font-weight: bold"><span style="color: #000080">spawn</span></span>, <span style="font-weight: bold"><span style="color: #000080">pid</span></span>(), <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>()}</tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="_error_response">error_response</h3> +<div class="paragraph"><p>Send an error response if no response was sent previously.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">error_response</span>, <span style="font-weight: bold"><span style="color: #000000">cowboy:http_status</span></span>(), <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>(), <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()}</tt></pre></div></div> +</div> +<div class="sect2"> +<h3 id="switch_protocol_command">switch_protocol</h3> +<div class="paragraph"><p>Switch to a different protocol.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">switch_protocol</span>, <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>(), <span style="font-weight: bold"><span style="color: #000000">module</span></span>(), <span style="font-weight: bold"><span style="color: #000000">state</span></span>()}</tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +<div class="sect2"> +<h3 id="_stop">stop</h3> +<div class="paragraph"><p>Stop the stream.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="color: #FF6600">stop</span></tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>To indicate that an error occurred, either use <code>error_response</code> +before stopping, or use <code>internal_error</code>.</p></div> +</div> +<div class="sect2"> +<h3 id="_internal_error">internal_error</h3> +<div class="paragraph"><p>Stop the stream with an error.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">internal_error</span>, <span style="color: #009900">Reason</span>, <span style="color: #009900">HumanReadable</span>} + +<span style="color: #009900">Reason</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">HumanReadable</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>()</tt></pre></div></div> +<div class="paragraph"><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></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_predefined_events">Predefined events</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy will forward all messages sent to the stream to +the <code>info/3</code> callback. To send a message to a stream, +send a message to the connection process with the form +<code>{{Pid, StreamID}, Msg}</code>. The connection process will +then forward <code>Msg</code> to the stream handlers.</p></div> +<div class="paragraph"><p>Cowboy will also forward the exit signals for the +processes that the stream spawned.</p></div> +<div class="sect2"> +<h3 id="_exit">EXIT</h3> +<div class="paragraph"><p>A process spawned by this stream has exited.</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #000080">'EXIT'</span>, <span style="font-weight: bold"><span style="color: #000080">pid</span></span>(), <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>This is the raw exit message without any modification.</p></div> +</div> +<div class="sect2"> +<h3 id="_response">response</h3> +<div class="paragraph"><p>Same as the <a href="../response_command">response command</a>.</p></div> +<div class="paragraph"><p>Usually sent when the request process replies to the client. +May also be sent by Cowboy internally.</p></div> +</div> +<div class="sect2"> +<h3 id="_headers">headers</h3> +<div class="paragraph"><p>Same as the <a href="../headers_command">headers command</a>.</p></div> +<div class="paragraph"><p>Sent when the request process starts replying to the client.</p></div> +</div> +<div class="sect2"> +<h3 id="_data">data</h3> +<div class="paragraph"><p>Same as the <a href="../data_command">data command</a>.</p></div> +<div class="paragraph"><p>Sent when the request process streams data to the client.</p></div> +</div> +<div class="sect2"> +<h3 id="_trailers">trailers</h3> +<div class="paragraph"><p>Same as the <a href="../trailers_command">trailers command</a>.</p></div> +<div class="paragraph"><p>Sent when the request process sends the trailer field values +to the client.</p></div> +</div> +<div class="sect2"> +<h3 id="_push">push</h3> +<div class="paragraph"><p>Same as the <a href="../push_command">push command</a>.</p></div> +<div class="paragraph"><p>Sent when the request process pushes a resource to the client.</p></div> +</div> +<div class="sect2"> +<h3 id="_switch_protocol">switch_protocol</h3> +<div class="paragraph"><p>Same as the <a href="../switch_protocol_command">switch_protocol command</a>.</p></div> +<div class="paragraph"><p>Sent when switching to the HTTP/2 or Websocket protocol.</p></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_exports">Exports</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The following function should be called by modules implementing +stream handlers to execute the next stream handler in the list:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="../cowboy_stream.init">cowboy_stream:init(3)</a> - Initialize a stream +</p> +</li> +<li> +<p> +<a href="../cowboy_stream.data">cowboy_stream:data(3)</a> - Handle data for a stream +</p> +</li> +<li> +<p> +<a href="../cowboy_stream.info">cowboy_stream:info(3)</a> - Handle a message for a stream +</p> +</li> +<li> +<p> +<a href="../cowboy_stream.terminate">cowboy_stream:terminate(3)</a> - Terminate a stream +</p> +</li> +<li> +<p> +<a href="../cowboy_stream.early_error">cowboy_stream:early_error(3)</a> - Handle an early error for a stream +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_types">Types</h2> +<div class="sectionbody"> +<div class="sect2"> +<h3 id="_commands">commands()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">commands</span></span>() <span style="color: #990000">::</span> [<span style="color: #009900">Command</span>]</tt></pre></div></div> +<div class="paragraph"><p>See the <a href="../commands">list of commands</a> for details.</p></div> +</div> +<div class="sect2"> +<h3 id="_fin">fin()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">fin</span></span>() <span style="color: #990000">::</span> <span style="color: #FF6600">fin</span> | <span style="color: #FF6600">nofin</span></tt></pre></div></div> +<div class="paragraph"><p>Used in commands and events to indicate that this is +the end of the stream.</p></div> +</div> +<div class="sect2"> +<h3 id="_partial_req">partial_req()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">req</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">method</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> + <span style="color: #0000FF">version</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_version</span></span>() | <span style="font-weight: bold"><span style="color: #000080">atom</span></span>(), + <span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> + <span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% lowercase; case insensitive</span></span> + <span style="color: #0000FF">port</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>(), + <span style="color: #0000FF">path</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> + <span style="color: #0000FF">qs</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000080">binary</span></span>(), <span style="font-style: italic"><span style="color: #9A1900">%% case sensitive</span></span> + <span style="color: #0000FF">headers</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>(), + <span style="color: #0000FF">peer</span> <span style="color: #990000">=></span> {<span style="font-weight: bold"><span style="color: #000000">inet:ip_address</span></span>(), <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>()} +}</tt></pre></div></div> +<div class="paragraph"><p>Partial request information received when an early error is +detected.</p></div> +</div> +<div class="sect2"> +<h3 id="_reason">reason()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">reason</span></span>() <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">normal</span></span> | <span style="color: #FF6600">switch_protocol</span> + | {<span style="color: #FF6600">internal_error</span>, <span style="color: #FF6600">timeout</span> | {<span style="color: #FF6600">error</span> | <span style="font-weight: bold"><span style="color: #000080">exit</span></span> | <span style="font-weight: bold"><span style="color: #000080">throw</span></span>, <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}, <span style="color: #009900">HumanReadable</span>} + | {<span style="color: #FF6600">socket_error</span>, <span style="color: #FF6600">closed</span> | <span style="font-weight: bold"><span style="color: #000080">atom</span></span>(), <span style="color: #009900">HumanReadable</span>} + | {<span style="color: #FF6600">stream_error</span>, <span style="color: #009900">Error</span>, <span style="color: #009900">HumanReadable</span>} + | {<span style="color: #FF6600">connection_error</span>, <span style="color: #009900">Error</span>, <span style="color: #009900">HumanReadable</span>} + | {<span style="color: #FF6600">stop</span>, <span style="font-weight: bold"><span style="color: #000000">cow_http2:frame</span></span>(), <span style="color: #009900">HumanReadable</span>} + +<span style="color: #009900">Error</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>() +<span style="color: #009900">HumanReadable</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000080">atom</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>Reason for the stream termination.</p></div> +</div> +<div class="sect2"> +<h3 id="_resp_command">resp_command()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">resp_command</span></span>() <span style="color: #990000">::</span> {<span style="color: #FF6600">response</span>, <span style="font-weight: bold"><span style="color: #000000">cowboy:http_status</span></span>(), + <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>(), <span style="font-weight: bold"><span style="color: #000000">cowboy_req:resp_body</span></span>()}</tt></pre></div></div> +<div class="paragraph"><p>See the <a href="../response_command">response command</a> for details.</p></div> +</div> +<div class="sect2"> +<h3 id="_streamid">streamid()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">streamid</span></span>() <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>()</tt></pre></div></div> +<div class="paragraph"><p>The identifier for this stream.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: Module introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="..">cowboy(7)</a>, +<a href="../cowboy_http">cowboy_http(3)</a>, +<a href="../cowboy_http2">cowboy_http2(3)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git 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It also defines a callback interface +for handling Websocket connections.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_callbacks">Callbacks</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Websocket handlers must implement the following callback +interface:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) + <span style="color: #990000">-></span> {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>} + | {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, <span style="color: #009900">Opts</span>} + +<span style="font-weight: bold"><span style="color: #000000">websocket_init</span></span>(<span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="color: #009900">CallResult</span> <span style="font-style: italic"><span style="color: #9A1900">%% optional</span></span> +<span style="font-weight: bold"><span style="color: #000000">websocket_handle</span></span>(<span style="color: #009900">InFrame</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="color: #009900">CallResult</span> +<span style="font-weight: bold"><span style="color: #000000">websocket_info</span></span>(<span style="color: #009900">Info</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="color: #009900">CallResult</span> + +<span style="font-weight: bold"><span style="color: #000000">terminate</span></span>(<span style="color: #009900">Reason</span>, <span style="color: #009900">PartialReq</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> <span style="color: #FF6600">ok</span> <span style="font-style: italic"><span style="color: #9A1900">%% optional</span></span> + +<span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>() +<span style="color: #009900">PartialReq</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">map</span></span>() +<span style="color: #009900">State</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() +<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_websocket:opts</span></span>() +<span style="color: #009900">InFrame</span> <span style="color: #990000">::</span> {<span style="color: #FF6600">text</span> | <span style="font-weight: bold"><span style="color: #000080">binary</span></span> | <span style="color: #FF6600">ping</span> | <span style="color: #FF6600">pong</span>, <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()} +<span style="color: #009900">OutFrame</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cow_ws:frame</span></span>() <span style="font-style: italic"><span style="color: #9A1900">%% see types below</span></span> +<span style="color: #009900">Info</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">any</span></span>() + +<span style="color: #009900">CallResult</span> <span style="color: #990000">::</span> {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>} + | {<span style="color: #FF6600">ok</span>, <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>} + | {<span style="color: #FF6600">reply</span>, <span style="color: #009900">OutFrame</span> | [<span style="color: #009900">OutFrame</span>], <span style="color: #009900">State</span>} + | {<span style="color: #FF6600">reply</span>, <span style="color: #009900">OutFrame</span> | [<span style="color: #009900">OutFrame</span>], <span style="color: #009900">State</span>, <span style="color: #FF6600">hibernate</span>} + | {<span style="color: #FF6600">stop</span>, <span style="color: #009900">State</span>} + +<span style="color: #009900">Reason</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000080">normal</span></span> | <span style="color: #FF6600">stop</span> | <span style="color: #FF6600">timeout</span> + | <span style="color: #FF6600">remote</span> | {<span style="color: #FF6600">remote</span>, <span style="font-weight: bold"><span style="color: #000000">cow_ws:close_code</span></span>(), <span style="font-weight: bold"><span style="color: #000080">binary</span></span>()} + | {<span style="color: #FF6600">error</span>, <span style="color: #FF6600">badencoding</span> | <span style="color: #FF6600">badframe</span> | <span style="color: #FF6600">closed</span> | <span style="font-weight: bold"><span style="color: #000080">atom</span></span>()} + | {<span style="color: #FF6600">crash</span>, <span style="color: #FF6600">error</span> | <span style="font-weight: bold"><span style="color: #000080">exit</span></span> | <span style="font-weight: bold"><span style="color: #000080">throw</span></span>, <span style="font-weight: bold"><span style="color: #000000">any</span></span>()}</tt></pre></div></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>All three Websocket callbacks may send one or more frames +back to the client (by returning a <code>reply</code> tuple) or terminate +the connection (by sending a <code>close</code> frame or returning a <code>stop</code> +tuple).</p></div> +<div class="paragraph"><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></div> +<div class="paragraph"><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></div> +<div class="paragraph"><p>The following terminate reasons are defined for Websocket +connections:</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +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 class="hdlist1"> +remote +</dt> +<dd> +<p> + The remote endpoint closed the connection without giving any + further details. +</p> +</dd> +<dt class="hdlist1"> +{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 class="hdlist1"> +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 class="hdlist1"> +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 class="hdlist1"> +{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. The function + <code>erlang:get_stacktrace/0</code> can also be called to obtain the + stacktrace of the process when the crash occurred. +</p> +</dd> +<dt class="hdlist1"> +{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 class="hdlist1"> +{error, badframe} +</dt> +<dd> +<p> + A protocol error has been detected. +</p> +</dd> +<dt class="hdlist1"> +{error, closed} +</dt> +<dd> +<p> + The socket has been closed brutally without a close frame being + received first. +</p> +</dd> +<dt class="hdlist1"> +{error, Reason} +</dt> +<dd> +<p> + A socket error ocurred. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_types">Types</h2> +<div class="sectionbody"> +<div class="sect3"> +<h4 id="_cow_ws_frame">cow_ws:frame()</h4> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">frame</span></span>() <span style="color: #990000">::</span> {<span style="color: #FF6600">text</span>, <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} + | {<span style="font-weight: bold"><span style="color: #000080">binary</span></span>, <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} + | <span style="color: #FF6600">ping</span> | {<span style="color: #FF6600">ping</span>, <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} + | <span style="color: #FF6600">pong</span> | {<span style="color: #FF6600">pong</span>, <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} + | <span style="color: #FF6600">close</span> | {<span style="color: #FF6600">close</span>, <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} | {<span style="color: #FF6600">close</span>, <span style="font-weight: bold"><span style="color: #000000">close_code</span></span>(), <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()} + +<span style="font-weight: bold"><span style="color: #000000">close_code</span></span>() <span style="color: #990000">::</span> <span style="color: #993399">1000</span><span style="color: #990000">..</span><span style="color: #993399">1003</span> | <span style="color: #993399">1006</span><span style="color: #990000">..</span><span style="color: #993399">1011</span> | <span style="color: #993399">3000</span><span style="color: #990000">..</span><span style="color: #993399">4999</span></tt></pre></div></div> +<div class="paragraph"><p>Websocket frames that can be sent as a response.</p></div> +<div class="paragraph"><p>Note that there is no need to send pong frames back as +Cowboy does it automatically for you.</p></div> +</div> +<div class="sect2"> +<h3 id="_opts">opts()</h3> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">opts</span></span>() <span style="color: #990000">::</span> #{ + <span style="color: #0000FF">compress</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">boolean</span></span>(), + <span style="color: #0000FF">idle_timeout</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">timeout</span></span>(), + <span style="color: #0000FF">req_filter</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #0000FF">fun</span></span>((<span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>()) <span style="color: #990000">-></span> <span style="font-weight: bold"><span style="color: #000000">map</span></span>()) +}</tt></pre></div></div> +<div class="paragraph"><p>Websocket handler options.</p></div> +<div class="paragraph"><p>This configuration is passed to Cowboy from the <code>init/2</code> +function:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt><span style="font-weight: bold"><span style="color: #000000">init</span></span>(<span style="color: #009900">Req</span>, <span style="color: #009900">State</span>) <span style="color: #990000">-></span> + <span style="color: #009900">Opts</span> <span style="color: #990000">=</span> #{<span style="color: #0000FF">compress</span> <span style="color: #990000">=></span> <span style="color: #000080">true</span>}, + {<span style="color: #FF6600">cowboy_websocket</span>, <span style="color: #009900">Req</span>, <span style="color: #009900">State</span>, <span style="color: #009900">Opts</span>}<span style="color: #990000">.</span></tt></pre></div></div> +<div class="paragraph"><p>The default value is given next to the option name:</p></div> +<div class="dlist"><dl> +<dt class="hdlist1"> +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 class="hdlist1"> +idle_timeout (60000) +</dt> +<dd> +<p> + Time in milliseconds that Cowboy will keep the + connection open without receiving anything from + the client. +</p> +</dd> +<dt class="hdlist1"> +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> +</dl></div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_changelog">Changelog</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<strong>2.0</strong>: The Req object is no longer passed to Websocket callbacks. +</p> +</li> +<li> +<p> +<strong>2.0</strong>: The callback <code>websocket_terminate/3</code> was removed in favor of <code>terminate/3</code>. +</p> +</li> +<li> +<p> +<strong>1.0</strong>: Protocol introduced. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/http_status_codes/index.html b/docs/en/cowboy/2.2/manual/http_status_codes/index.html new file mode 100644 index 00000000..edd7c1cc --- /dev/null +++ b/docs/en/cowboy/2.2/manual/http_status_codes/index.html @@ -0,0 +1,408 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: HTTP status codes(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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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>HTTP status codes(7)</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>HTTP status codes - status codes used by Cowboy</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_100_continue">100 Continue</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_101_switching_protocols">101 Switching Protocols</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This is the status code sent when switching to the +Websocket protocol.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_200_ok">200 OK</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_201_created">201 Created</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_202_accepted">202 Accepted</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_204_no_content">204 No Content</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_300_multiple_choices">300 Multiple Choices</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_301_moved_permanently">301 Moved Permanently</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_303_see_other">303 See Other</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_304_not_modified">304 Not Modified</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_307_temporary_redirect">307 Temporary Redirect</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_400_bad_request">400 Bad Request</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy will send this status code for any of the +following reasons:</p></div> +<div class="ulist"><ul> +<li> +<p> +Too many empty lines were sent before the request. +</p> +</li> +<li> +<p> +The request-line could not be parsed. +</p> +</li> +<li> +<p> +Too many headers were sent. +</p> +</li> +<li> +<p> +A header name was too long. +</p> +</li> +<li> +<p> +A header value was too long. +</p> +</li> +<li> +<p> +The host header was missing from an HTTP/1.1 request. +</p> +</li> +<li> +<p> +The host header could not be parsed. +</p> +</li> +<li> +<p> +The requested host was not found. +</p> +</li> +<li> +<p> +The requested path could not be parsed. +</p> +</li> +<li> +<p> +The accept header could not be parsed when using REST. +</p> +</li> +<li> +<p> +REST under normal conditions. +</p> +</li> +<li> +<p> +A Websocket upgrade failed. +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_401_unauthorized">401 Unauthorized</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_403_forbidden">403 Forbidden</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_404_not_found">404 Not Found</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent when the router successfully +resolved the host but didn’t find a matching path for +the request. It may also be sent by <code>cowboy_rest</code> under +normal conditions.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_405_method_not_allowed">405 Method Not Allowed</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_406_not_acceptable">406 Not Acceptable</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_408_request_timeout">408 Request Timeout</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_409_conflict">409 Conflict</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_410_gone">410 Gone</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_412_precondition_failed">412 Precondition Failed</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_413_request_entity_too_large">413 Request Entity Too Large</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_414_request_uri_too_long">414 Request-URI Too Long</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_415_unsupported_media_type">415 Unsupported Media Type</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_500_internal_server_error">500 Internal Server Error</h2> +<div class="sectionbody"> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_501_not_implemented">501 Not Implemented</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_503_service_unavailable">503 Service Unavailable</h2> +<div class="sectionbody"> +<div class="paragraph"><p>This status code is sent by <code>cowboy_rest</code>.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_505_http_version_not_supported">505 HTTP Version Not Supported</h2> +<div class="sectionbody"> +<div class="paragraph"><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> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/en/cowboy/2.2/manual/index.html b/docs/en/cowboy/2.2/manual/index.html new file mode 100644 index 00000000..df573b4c --- /dev/null +++ b/docs/en/cowboy/2.2/manual/index.html @@ -0,0 +1,308 @@ +<!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"> + + <meta name="generator" content="Hugo 0.30.2" /> + + <title>Nine Nines: Cowboy Function Reference</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=1" 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="Keep in touch!" href="http://twitter.com/lhoguin"><img src="/img/ico_microblog.png" data-hover="/img/ico_microblog_alt.png"></a> + </li> + <li> + <a title="Contact me" href="mailto:[email protected]"><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 Function Reference</span></h1> + +<div class="sect1"> +<h2 id="_name">Name</h2> +<div class="sectionbody"> +<div class="paragraph"><p>cowboy - Small, fast, modern HTTP server for Erlang/OTP</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">Description</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Cowboy is an HTTP server for Erlang/OTP with support for the +HTTP/1.1, HTTP/2 and Websocket protocols.</p></div> +<div class="paragraph"><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></div> +</div> +</div> +<div class="sect1"> +<h2 id="_modules">Modules</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Functions:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="cowboy">cowboy(3)</a> - Listener management +</p> +</li> +<li> +<p> +<a href="cowboy_req">cowboy_req(3)</a> - Request and response +</p> +</li> +<li> +<p> +<a href="cowboy_router">cowboy_router(3)</a> - Router +</p> +</li> +<li> +<p> +<a href="cowboy_constraints">cowboy_constraints(3)</a> - Constraints +</p> +</li> +</ul></div> +<div class="paragraph"><p>Protocols:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="cowboy_http">cowboy_http(3)</a> - HTTP/1.1 +</p> +</li> +<li> +<p> +<a href="cowboy_http2">cowboy_http2(3)</a> - HTTP/2 +</p> +</li> +<li> +<p> +<a href="cowboy_websocket">cowboy_websocket(3)</a> - Websocket +</p> +</li> +</ul></div> +<div class="paragraph"><p>Handlers:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="cowboy_static">cowboy_static(3)</a> - Static file handler +</p> +</li> +</ul></div> +<div class="paragraph"><p>Behaviors:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="cowboy_handler">cowboy_handler(3)</a> - Plain HTTP handlers +</p> +</li> +<li> +<p> +<a href="cowboy_loop">cowboy_loop(3)</a> - Loop handlers +</p> +</li> +<li> +<p> +<a href="cowboy_middleware">cowboy_middleware(3)</a> - Middlewares +</p> +</li> +<li> +<p> +<a href="cowboy_rest">cowboy_rest(3)</a> - REST handlers +</p> +</li> +<li> +<p> +<a href="cowboy_stream">cowboy_stream(3)</a> - Stream handlers +</p> +</li> +<li> +<p> +<a href="cowboy_websocket">cowboy_websocket(3)</a> - Websocket handlers +</p> +</li> +</ul></div> +<div class="paragraph"><p>Middlewares:</p></div> +<div class="ulist"><ul> +<li> +<p> +<a href="cowboy_router">cowboy_router(3)</a> - Router middleware +</p> +</li> +<li> +<p> +<a href="cowboy_handler">cowboy_handler(3)</a> - Handler middleware +</p> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_dependencies">Dependencies</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +<a href="ranch_app">ranch(7)</a> - Socket acceptor pool for TCP protocols +</p> +</li> +<li> +<p> +<a href="cowlib_app">cowlib(7)</a> - Support library for manipulating Web protocols +</p> +</li> +<li> +<p> +ssl - Secure communication over sockets +</p> +</li> +<li> +<p> +crypto - Crypto functions +</p> +</li> +</ul></div> +<div class="paragraph"><p>All these applications must be started before the <code>cowboy</code> +application. To start Cowboy and all dependencies at once:</p></div> +<div class="listingblock"> +<div class="content"><!-- Generator: GNU source-highlight 3.1.8 +by Lorenzo Bettini +http://www.lorenzobettini.it +http://www.gnu.org/software/src-highlite --> +<pre><tt>{<span style="color: #FF6600">ok</span>, <span style="color: #990000">_</span>} <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">application:ensure_all_started</span></span>(<span style="color: #FF6600">cowboy</span>)<span style="color: #990000">.</span></tt></pre></div></div> +</div> +</div> +<div class="sect1"> +<h2 id="_environment">Environment</h2> +<div class="sectionbody"> +<div class="paragraph"><p>The <code>cowboy</code> application does not define any application +environment configuration parameters.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">See also</h2> +<div class="sectionbody"> +<div class="paragraph"><p><a href="ranch_app">ranch(7)</a>, +<a href="cowlib_app">cowlib(7)</a></p></div> +</div> +</div> + + + + + +</div> + +<div class="span3 sidecol"> + + +<h3> + Cowboy + 2.2 + Function Reference + +</h3> + +<ul> + + <li><a href="/docs/en/cowboy/2.2/guide">User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Function Reference</a></li> + + +</ul> + +<h4 id="docs-nav">Navigation</h4> + +<h4>Version select</h4> +<ul> + + + + <li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li> + + <li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li> + + <li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li> + + <li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li> + +</ul> + +</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:[email protected]" 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 © Loïc Hoguin 2012-2016</p> + </div> + </div> + </div> + </footer> + + + <script src="/js/custom.js"></script> + </body> +</html> + + diff --git a/docs/index.html b/docs/index.html index 26e0c5bb..d695a64a 100644 --- a/docs/index.html +++ b/docs/index.html @@ -77,6 +77,13 @@ <ul> + <li><a href="/docs/en/cowboy/2.2/guide">Cowboy 2.2 User Guide</a></li> + + + <li><a href="/docs/en/cowboy/2.2/manual">Cowboy 2.2 Function Reference</a></li> + + + <li><a href="/docs/en/cowboy/2.1/guide">Cowboy 2.1 User Guide</a></li> diff --git a/docs/index.xml b/docs/index.xml index 9b9be942..fb953ed6 100644 --- a/docs/index.xml +++ b/docs/index.xml @@ -93,6 +93,17 @@ </item> <item> + <title>The modern Web</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/modern_web/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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.</description> + </item> + + <item> <title>Erlang and the Web</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/guide/erlang_web/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -113,6 +124,16 @@ </item> <item> + <title>Erlang and the Web</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/erlang_web/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Getting started</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/getting_started/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -201,6 +222,18 @@ </item> <item> + <title>Introduction</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/introduction/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Transports</title> <link>https://ninenines.eu/docs/en/ranch/1.2/guide/transports/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -311,6 +344,16 @@ </item> <item> + <title>Getting started</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/getting_started/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Updating Erlang.mk</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/updating/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -398,6 +441,17 @@ </item> <item> + <title>Flow diagram</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/flow_diagram/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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.</description> + </item> + + <item> <title>Websocket</title> <link>https://ninenines.eu/docs/en/gun/1.0/guide/websocket/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -476,6 +530,17 @@ </item> <item> + <title>Listeners</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/listeners/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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.</description> + </item> + + <item> <title>SSL client authentication</title> <link>https://ninenines.eu/docs/en/ranch/1.2/guide/ssl_auth/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -541,6 +606,18 @@ </item> <item> + <title>Routing</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/routing/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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. + When Cowboy receives a request, it tries to match the requested host and path to the configured routes. When there&#8217;s a match, the route&#8217;s associated handler is executed. + Routes need to be compiled before they can be used by Cowboy. The result of the compilation is the dispatch rules.</description> + </item> + + <item> <title>NIFs and port drivers</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/ports/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -606,6 +683,18 @@ </item> <item> + <title>Constraints</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/constraints/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Releases</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/releases/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -655,6 +744,19 @@ </item> <item> + <title>Handlers</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/handlers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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) -&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>Escripts</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/escripts/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -687,6 +789,16 @@ </item> <item> + <title>Loop handlers</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/loop_handlers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>OTP version management</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/kerl/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -719,6 +831,17 @@ </item> <item> + <title>Static files</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/static_files/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Compatibility with other build tools</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/compat/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -762,6 +885,17 @@ </item> <item> + <title>The Req object</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/req/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Reading the request body</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/guide/req_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -786,6 +920,18 @@ </item> <item> + <title>Reading the request body</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/req_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>EDoc comments</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/edoc/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -831,6 +977,17 @@ </item> <item> + <title>Sending a response</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/resp/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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.</description> + </item> + + <item> <title>EUnit</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/eunit/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -862,6 +1019,16 @@ </item> <item> + <title>Using cookies</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/cookies/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Common Test</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/common_test/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -895,6 +1062,17 @@ </item> <item> + <title>Multipart requests</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/multipart/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Code coverage</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/coverage/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -927,6 +1105,17 @@ </item> <item> + <title>REST principles</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_principles/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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&#8217;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>Continuous integration</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/ci/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -959,6 +1148,17 @@ </item> <item> + <title>REST handlers</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_handlers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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&#8217;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.</description> + </item> + + <item> <title>Dialyzer</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/dialyzer/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1002,6 +1202,17 @@ </item> <item> + <title>REST flowcharts</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/rest_flowcharts/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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 "Start" diagram, and all paths excluding the OPTIONS path go through the "Content negotiation"</description> + </item> + + <item> <title>External plugins</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/external_plugins/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1033,6 +1244,16 @@ </item> <item> + <title>Designing a resource handler</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/resource_design/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>List of plugins</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/external_plugins_list/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1068,6 +1289,17 @@ </item> <item> + <title>The Websocket protocol</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/ws_protocol/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Why Erlang.mk</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/why/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1100,6 +1332,16 @@ </item> <item> + <title>Websocket handlers</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/ws_handlers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Short history</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/history/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1133,6 +1375,17 @@ </item> <item> + <title>Streams</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/streams/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Contributing</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/contributing/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1167,6 +1420,17 @@ </item> <item> + <title>Middlewares</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/middlewares/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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>Migrating from Cowboy 1.0 to 2.0</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/guide/migrating_from_1.0/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1188,6 +1452,16 @@ </item> <item> + <title>Migrating from Cowboy 2.1 to 2.2</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/migrating_from_2.1/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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/2.0/guide/specs/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1209,6 +1483,16 @@ </item> <item> + <title>Migrating from Cowboy 2.0 to 2.1</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/migrating_from_2.0/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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.</description> + </item> + + <item> <title>HTTP and other specifications</title> <link>https://ninenines.eu/docs/en/cowboy/2.1/guide/specs/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1219,6 +1503,27 @@ </item> <item> + <title>Migrating from Cowboy 1.0 to 2.0</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/migrating_from_1.0/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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.</description> + </item> + + <item> + <title>HTTP and other specifications</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/specs/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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 REST: Fielding&#8217;s Dissertation RFC 1945: HTTP/1.</description> + </item> + + <item> <title>Cowboy Function Reference</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1245,6 +1550,19 @@ </item> <item> + <title>Cowboy Function Reference</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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 User Guide</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/guide/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1263,6 +1581,15 @@ </item> <item> + <title>Cowboy User Guide</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/guide/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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 Additional information Migrating from Cowboy 2.</description> + </item> + + <item> <title>Erlang.mk User Guide</title> <link>https://ninenines.eu/docs/en/erlang.mk/1/guide/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1312,6 +1639,17 @@ </item> <item> + <title>HTTP status codes(7)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/http_status_codes/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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.</description> + </item> + + <item> <title>Ranch Function Reference</title> <link>https://ninenines.eu/docs/en/ranch/1.2/manual/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1388,6 +1726,17 @@ </item> <item> + <title>cowboy(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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:set_env(3) - Update a listener&#8217;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(7)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_app/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1414,6 +1763,19 @@ </item> <item> + <title>cowboy(7)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_app/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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:set_env(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy.set_env/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1440,6 +1802,19 @@ </item> <item> + <title>cowboy:set_env(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy.set_env/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy.set_env/</guid> + <description>Name cowboy:set_env - Update a listener&#8217;s environment value + Description set_env(Name :: ranch:ref(), Key :: atom(), Value :: any()) -&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:start_clear(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy.start_clear/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1462,6 +1837,17 @@ </item> <item> + <title>cowboy:start_clear(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy.start_clear/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&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.</description> + </item> + + <item> <title>cowboy:start_tls(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy.start_tls/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1486,6 +1872,18 @@ </item> <item> + <title>cowboy:start_tls(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy.start_tls/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&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:stop_listener(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy.stop_listener/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1512,6 +1910,19 @@ </item> <item> + <title>cowboy:stop_listener(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy.stop_listener/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy.stop_listener/</guid> + <description>Name cowboy:stop_listener - Stop the given listener + Description stop_listener(Name :: ranch:ref()) -&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.</description> + </item> + + <item> <title>cowboy_constraints(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_constraints/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1538,6 +1949,19 @@ </item> <item> + <title>cowboy_constraints(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_constraints/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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:int(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_constraints.int/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1564,6 +1988,19 @@ </item> <item> + <title>cowboy_constraints:int(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_constraints.int/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_constraints.int/</guid> + <description>Name cowboy_constraints:int - Integer constraint + Description Constraint functions implement a number of different operations. + int(forward, Bin) -&gt; {ok, Int} | {error, not_an_integer} Bin :: binary() Int :: integer() Validate and convert the text representation of an integer. + int(reverse, Int) -&gt; {ok, Bin} | {error, not_an_integer} Convert an integer back to its text representation. + int(format_error, Error) -&gt; HumanReadable Error :: {not_an_integer, Bin | Int} HumanReadable :: iolist() Generate a human-readable error message.</description> + </item> + + <item> <title>cowboy_constraints:nonempty(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_constraints.nonempty/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1592,6 +2029,20 @@ </item> <item> + <title>cowboy_constraints:nonempty(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_constraints.nonempty/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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, &lt;&lt;&gt;&gt;) -&gt; {error, empty} Reject empty values. + nonempty(forward | reverse, Bin) -&gt; {ok, Bin} Bin :: binary() Accept any other binary values. + nonempty(format_error, Error) -&gt; HumanReadable Error :: {empty, Bin} HumanReadable :: iolist() Generate a human-readable error message. + Arguments Arguments vary depending on the operation.</description> + </item> + + <item> <title>cowboy_handler(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_handler/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1616,6 +2067,18 @@ </item> <item> + <title>cowboy_handler(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_handler/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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:terminate(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_handler.terminate/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1640,6 +2103,18 @@ </item> <item> + <title>cowboy_handler:terminate(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_handler.terminate/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_handler.terminate/</guid> + <description>Name cowboy_handler:terminate - Terminate the handler + Description terminate(Reason, PartialReq, State, Handler) -&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.</description> + </item> + + <item> <title>cowboy_http(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_http/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1662,6 +2137,17 @@ </item> <item> + <title>cowboy_http(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_http/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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() :: #{ connection_type =&gt; worker | supervisor, env =&gt; cowboy_middleware:env(), idle_timeout =&gt; timeout(), inactivity_timeout =&gt; timeout(), max_empty_lines =&gt; non_neg_integer(), max_header_name_length =&gt; non_neg_integer(), max_header_value_length =&gt; non_neg_integer(), max_headers =&gt; non_neg_integer(), max_keepalive =&gt; non_neg_integer(), max_method_length =&gt; non_neg_integer(), max_request_line_length =&gt; non_neg_integer(), max_skip_body_length =&gt; non_neg_integer(), middlewares =&gt; [module()], request_timeout =&gt; timeout(), shutdown_timeout =&gt; timeout(), stream_handlers =&gt; [module()] } Configuration for the HTTP/1.</description> + </item> + + <item> <title>cowboy_http2(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_http2/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1688,6 +2174,19 @@ </item> <item> + <title>cowboy_http2(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_http2/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_http2/</guid> + <description>Name cowboy_http2 - HTTP/2 + Description The module cowboy_http2 implements HTTP/2 as a Ranch protocol. + Options opts() :: #{ connection_type =&gt; worker | supervisor, env =&gt; cowboy_middleware:env(), inactivity_timeout =&gt; timeout(), middlewares =&gt; [module()], preface_timeout =&gt; timeout(), shutdown_timeout =&gt; timeout(), stream_handlers =&gt; [module()] } Configuration for the HTTP/2 protocol. + This configuration is passed to Cowboy when starting listeners using cowboy:start_clear/3 or cowboy:start_tls/3 functions. + It can be updated without restarting listeners using the Ranch functions ranch:get_protocol_options/1 and ranch:set_protocol_options/2.</description> + </item> + + <item> <title>cowboy_loop(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_loop/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1714,6 +2213,19 @@ </item> <item> + <title>cowboy_loop(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_loop/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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_middleware(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_middleware/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1740,6 +2252,19 @@ </item> <item> + <title>cowboy_middleware(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_middleware/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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) -&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.</description> + </item> + + <item> <title>cowboy_req(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1770,6 +2295,21 @@ </item> <item> + <title>cowboy_req(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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</description> + </item> + + <item> <title>cowboy_req:binding(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.binding/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1792,6 +2332,17 @@ </item> <item> + <title>cowboy_req:binding(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.binding/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.binding/</guid> + <description>Name cowboy_req:binding - Access a value bound from the route + Description binding(Name, Req) -&gt; binding(Name, Req, undefined) binding(Name, Req, Default) -&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.</description> + </item> + + <item> <title>cowboy_req:bindings(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.bindings/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1816,6 +2367,18 @@ </item> <item> + <title>cowboy_req:bindings(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.bindings/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.bindings/</guid> + <description>Name cowboy_req:bindings - Access all values bound from the route + Description bindings(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:body_length(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.body_length/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1840,6 +2403,18 @@ </item> <item> + <title>cowboy_req:body_length(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.body_length/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.body_length/</guid> + <description>Name cowboy_req:body_length - Body length + Description body_length(Req :: cowboy_req:req()) -&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:cert(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.1/manual/cowboy_req.cert/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1852,6 +2427,18 @@ </item> <item> + <title>cowboy_req:cert(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.cert/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.cert/</guid> + <description>Name cowboy_req:cert - Client TLS certificate + Description cert(Req :: cowboy_req:req()) -&gt; binary() | undefined Return the peer&#8217;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}, {cert, "path/to/cert.pem"}, {verify, verify_peer} ], #{ env =&gt; #{dispatch =&gt; Dispatch} }).</description> + </item> + + <item> <title>cowboy_req:delete_resp_header(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.delete_resp_header/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1876,6 +2463,18 @@ </item> <item> + <title>cowboy_req:delete_resp_header(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.delete_resp_header/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&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.</description> + </item> + + <item> <title>cowboy_req:has_body(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.has_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1900,6 +2499,18 @@ </item> <item> + <title>cowboy_req:has_body(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.has_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.has_body/</guid> + <description>Name cowboy_req:has_body - Is there a request body? + Description has_body(Req :: cowboy_req:req()) -&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).</description> + </item> + + <item> <title>cowboy_req:has_resp_body(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1926,6 +2537,19 @@ </item> <item> + <title>cowboy_req:has_resp_body(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&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.</description> + </item> + + <item> <title>cowboy_req:has_resp_header(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.has_resp_header/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1950,6 +2574,18 @@ </item> <item> + <title>cowboy_req:has_resp_header(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.has_resp_header/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&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:header(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.header/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1972,6 +2608,17 @@ </item> <item> + <title>cowboy_req:header(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.header/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.header/</guid> + <description>Name cowboy_req:header - HTTP header + Description header(Name, Req) -&gt; header(Name, Req, undefined) header(Name, Req, Default) -&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.</description> + </item> + + <item> <title>cowboy_req:headers(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.headers/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -1998,6 +2645,19 @@ </item> <item> + <title>cowboy_req:headers(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.headers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.headers/</guid> + <description>Name cowboy_req:headers - HTTP headers + Description headers(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:host(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.host/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2022,6 +2682,18 @@ </item> <item> + <title>cowboy_req:host(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.host/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.host/</guid> + <description>Name cowboy_req:host - URI host name + Description host(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:host_info(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.host_info/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2046,6 +2718,18 @@ </item> <item> + <title>cowboy_req:host_info(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.host_info/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.host_info/</guid> + <description>Name cowboy_req:host_info - Access the route&#8217;s heading host segments + Description host_info(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:inform(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.1/manual/cowboy_req.inform/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2057,6 +2741,17 @@ </item> <item> + <title>cowboy_req:inform(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.inform/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.inform/</guid> + <description>Name cowboy_req:inform - Send an informational response + Description inform(Status, Req :: cowboy_req:req()) -&gt; inform(StatusCode, #{}, Req) inform(Status, Headers, Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:match_cookies(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.match_cookies/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2079,6 +2774,17 @@ </item> <item> + <title>cowboy_req:match_cookies(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.match_cookies/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&gt; #{atom() =&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_qs(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.match_qs/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2101,6 +2807,17 @@ </item> <item> + <title>cowboy_req:match_qs(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.match_qs/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&gt; #{atom() =&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:method(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.method/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2125,6 +2842,18 @@ </item> <item> + <title>cowboy_req:method(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.method/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.method/</guid> + <description>Name cowboy_req:method - HTTP method + Description method(Req :: cowboy_req:req()) -&gt; Method :: binary() Return the request&#8217;s HTTP method. + The method can also be obtained using pattern matching: + #{method := Method} = Req. Arguments Req The Req object. Return value The request&#8217;s HTTP method is returned as a binary string. While methods are case sensitive, standard methods are always uppercase.</description> + </item> + + <item> <title>cowboy_req:parse_cookies(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.parse_cookies/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2153,6 +2882,20 @@ </item> <item> + <title>cowboy_req:parse_cookies(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.parse_cookies/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.parse_cookies/</guid> + <description>Name cowboy_req:parse_cookies - Parse cookie headers + Description parse_cookies(Req) -&gt; [{Name, Value}] Name :: binary() %% case sensitive Value :: binary() %% case sensitive Parse cookie headers. + Alias for cowboy_req:parse_header([cookie], Req). + When the cookie header is missing, [] is returned. + While an empty cookie header is not valid, some clients do send it. Cowboy will in this case also return []. + Arguments Req The Req object.</description> + </item> + + <item> <title>cowboy_req:parse_header(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.parse_header/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2175,6 +2918,17 @@ </item> <item> + <title>cowboy_req:parse_header(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.parse_header/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.parse_header/</guid> + <description>Name cowboy_req:parse_header - Parse the given HTTP header + Description parse_header(Name, Req) -&gt; ParsedValue | Default parse_header(Name, Req, Default) -&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.</description> + </item> + + <item> <title>cowboy_req:parse_qs(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.parse_qs/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2197,6 +2951,17 @@ </item> <item> + <title>cowboy_req:parse_qs(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.parse_qs/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.parse_qs/</guid> + <description>Name cowboy_req:parse_qs - Parse the query string + Description parse_qs(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:path(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.path/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2223,6 +2988,19 @@ </item> <item> + <title>cowboy_req:path(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.path/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.path/</guid> + <description>Name cowboy_req:path - URI path + Description path(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:path_info(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.path_info/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2247,6 +3025,18 @@ </item> <item> + <title>cowboy_req:path_info(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.path_info/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.path_info/</guid> + <description>Name cowboy_req:path_info - Access the route&#8217;s trailing path segments + Description path_info(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:peer(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.peer/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2272,6 +3062,18 @@ </item> <item> + <title>cowboy_req:peer(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.peer/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.peer/</guid> + <description>Name cowboy_req:peer - Peer address and port + Description peer(Req :: cowboy_req:req()) -&gt; Info Info :: {inet:ip_address(), inet:port_number()} Return the peer&#8217;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&#8217;s IP address and port number.</description> + </item> + + <item> <title>cowboy_req:port(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.port/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2298,6 +3100,19 @@ </item> <item> + <title>cowboy_req:port(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.port/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.port/</guid> + <description>Name cowboy_req:port - URI port number + Description port(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:push(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.push/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2320,6 +3135,17 @@ </item> <item> + <title>cowboy_req:push(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.push/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.push/</guid> + <description>Name cowboy_req:push - Push a resource to the client + Description push(Path, Headers, Req :: cowboy_req:req()) -&gt; push(Path, Headers, Req, #{}) push(Path, Headers, Req :: cowboy_req:req(), Opts) -&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:qs(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.qs/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2344,6 +3170,18 @@ </item> <item> + <title>cowboy_req:qs(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.qs/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.qs/</guid> + <description>Name cowboy_req:qs - URI query string + Description qs(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_req:read_body(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.read_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2366,6 +3204,17 @@ </item> <item> + <title>cowboy_req:read_body(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.read_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.read_body/</guid> + <description>Name cowboy_req:read_body - Read the request body + Description read_body(Req :: cowboy_req:req()) -&gt; read_body(Req, #{}) read_body(Req :: cowboy_req:req(), Opts) -&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_part(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.read_part/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2388,6 +3237,17 @@ </item> <item> + <title>cowboy_req:read_part(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.read_part/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.read_part/</guid> + <description>Name cowboy_req:read_part - Read the next multipart headers + Description read_part(Req :: cowboy_req:req()) -&gt; read_part(Req, #{}) read_part(Req :: cowboy_req:req(), Opts) -&gt; {ok, Headers, Req} | {done, Req} Opts :: cowboy_req:read_body_opts() Headers :: #{binary() =&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_body(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.read_part_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2410,6 +3270,17 @@ </item> <item> + <title>cowboy_req:read_part_body(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.read_part_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.read_part_body/</guid> + <description>Name cowboy_req:read_part_body - Read the current part&#8217;s body + Description read_part_body(Req :: cowboy_req:req()) -&gt; read_part_body(Req, #{}) read_part_body(Req :: cowboy_req:req(), Opts) -&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.</description> + </item> + + <item> <title>cowboy_req:read_urlencoded_body(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.read_urlencoded_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2434,6 +3305,18 @@ </item> <item> + <title>cowboy_req:read_urlencoded_body(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.read_urlencoded_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&gt; read_urlencoded_body(Req, #{}) read_urlencoded_body(Req :: cowboy_req:req(), Opts) -&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:reply(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.reply/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2456,6 +3339,17 @@ </item> <item> + <title>cowboy_req:reply(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.reply/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.reply/</guid> + <description>Name cowboy_req:reply - Send the response + Description reply(Status, Req :: cowboy_req:req()) -&gt; reply(StatusCode, #{}, Req) reply(Status, Headers, Req :: cowboy_req:req()) -&gt; Req reply(Status, Headers, Body, Req :: cowboy_req:req()) -&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:resp_header(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.resp_header/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2480,6 +3374,18 @@ </item> <item> + <title>cowboy_req:resp_header(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.resp_header/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.resp_header/</guid> + <description>Name cowboy_req:resp_header - Response header + Description resp_header(Name, Req) -&gt; resp_header(Name, Req, undefined) resp_header(Name, Req, Default) -&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_headers(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.resp_headers/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2504,6 +3410,18 @@ </item> <item> + <title>cowboy_req:resp_headers(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.resp_headers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.resp_headers/</guid> + <description>Name cowboy_req:resp_headers - Response headers + Description resp_headers(Req :: cowboy_req:req()) -&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).</description> + </item> + + <item> <title>cowboy_req:scheme(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.scheme/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2530,6 +3448,19 @@ </item> <item> + <title>cowboy_req:scheme(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.scheme/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.scheme/</guid> + <description>Name cowboy_req:scheme - URI scheme + Description scheme(Req :: cowboy_req:req()) -&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 &lt;&lt;"</description> + </item> + + <item> <title>cowboy_req:set_resp_body(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2554,6 +3485,18 @@ </item> <item> + <title>cowboy_req:set_resp_body(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&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_cookie(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_cookie/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2578,6 +3521,18 @@ </item> <item> + <title>cowboy_req:set_resp_cookie(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_cookie/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&gt; set_resp_cookie(Name, Value, [], Req) set_resp_cookie(Name, Value, Req :: cowboy_req:req(), Opts) -&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.</description> + </item> + + <item> <title>cowboy_req:set_resp_header(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_header/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2600,6 +3555,17 @@ </item> <item> + <title>cowboy_req:set_resp_header(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_header/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&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.</description> + </item> + + <item> <title>cowboy_req:set_resp_headers(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.set_resp_headers/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2624,6 +3590,18 @@ </item> <item> + <title>cowboy_req:set_resp_headers(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_headers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&gt; Req Headers :: cowboy:http_headers() 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:sock(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.1/manual/cowboy_req.sock/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2636,6 +3614,18 @@ </item> <item> + <title>cowboy_req:sock(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.sock/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.sock/</guid> + <description>Name cowboy_req:sock - Socket address and port + Description sock(Req :: cowboy_req:req()) -&gt; Info Info :: {inet:ip_address(), inet:port_number()} Return the socket&#8217;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&#8217;s local IP address and port number.</description> + </item> + + <item> <title>cowboy_req:stream_body(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.stream_body/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2660,6 +3650,18 @@ </item> <item> + <title>cowboy_req:stream_body(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.stream_body/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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()) -&gt; ok Data :: iodata() 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.</description> + </item> + + <item> <title>cowboy_req:stream_reply(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.stream_reply/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2684,6 +3686,30 @@ </item> <item> + <title>cowboy_req:stream_reply(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.stream_reply/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.stream_reply/</guid> + <description>Name cowboy_req:stream_reply - Send the response headers + Description stream_reply(Status, Req :: cowboy_req:req()) -&gt; stream_reply(StatusCode, #{}, Req) stream_reply(Status, Headers, Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> + <title>cowboy_req:stream_trailers(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.stream_trailers/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.stream_trailers/</guid> + <description>Name cowboy_req:stream_trailers - Send the response trailers + Description stream_trailers(Trailers, Req :: cowboy_req:req()) -&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:uri(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.uri/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2706,6 +3732,17 @@ </item> <item> + <title>cowboy_req:uri(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.uri/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.uri/</guid> + <description>Name cowboy_req:uri - Reconstructed URI + Description uri(Req :: cowboy_req:req()) -&gt; uri(Req, #{}) uri(Req :: cowboy_req:req(), Opts) -&gt; URI :: iodata() Opts :: #{ scheme =&gt; iodata() | undefined, host =&gt; iodata() | undefined, port =&gt; inet:port_number() | undefined, path =&gt; iodata() | undefined, qs =&gt; iodata() | undefined, fragment =&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:version(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_req.version/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2730,6 +3767,18 @@ </item> <item> + <title>cowboy_req:version(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.version/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_req.version/</guid> + <description>Name cowboy_req:version - HTTP version + Description version(Req :: cowboy_req:req()) -&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.</description> + </item> + + <item> <title>cowboy_rest(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_rest/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2756,6 +3805,19 @@ </item> <item> + <title>cowboy_rest(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_rest/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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) -&gt; {cowboy_rest, Req, State} Callback(Req, State) -&gt; {Result, Req, State} | {stop, Req, State} | {{switch_handler, Module}, Req, State} | {{switch_handler, Module, Opts}, Req, State} terminate(Reason, Req, State) -&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_router(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_router/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2780,6 +3842,18 @@ </item> <item> + <title>cowboy_router(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_router/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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. + When a route matches, the router sets the handler and handler_opts middleware environment values containing the handler module and initial state, respectively.</description> + </item> + + <item> <title>cowboy_router:compile(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_router.compile/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2804,6 +3878,18 @@ </item> <item> + <title>cowboy_router:compile(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_router.compile/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_router.compile/</guid> + <description>Name cowboy_router:compile - Compile routes to the resources + Description compile(cowboy_router:routes()) -&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.</description> + </item> + + <item> <title>cowboy_static(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_static/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2828,6 +3914,18 @@ </item> <item> + <title>cowboy_static(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_static/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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 :: [Etag | Mimetypes] 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_stream(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_stream/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2852,6 +3950,18 @@ </item> <item> + <title>cowboy_stream(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_stream/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_stream/</guid> + <description>Name cowboy_handler - 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.</description> + </item> + + <item> <title>cowboy_websocket(3)</title> <link>https://ninenines.eu/docs/en/cowboy/2.0/manual/cowboy_websocket/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> @@ -2876,6 +3986,18 @@ </item> <item> + <title>cowboy_websocket(3)</title> + <link>https://ninenines.eu/docs/en/cowboy/2.2/manual/cowboy_websocket/</link> + <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> + + <guid>https://ninenines.eu/docs/en/cowboy/2.2/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) -&gt; {cowboy_websocket, Req, State} | {cowboy_websocket, Req, State, Opts} websocket_init(State) -&gt; CallResult %% optional websocket_handle(InFrame, State) -&gt; CallResult websocket_info(Info, State) -&gt; CallResult terminate(Reason, PartialReq, State) -&gt; ok %% optional Req :: cowboy_req:req() PartialReq :: map() State :: any() Opts :: cowboy_websocket:opts() InFrame :: {text | binary | ping | pong, binary()} OutFrame :: cow_ws:frame() %% see types below Info :: any() CallResult :: {ok, State} | {ok, State, hibernate} | {reply, OutFrame | [OutFrame], State} | {reply, OutFrame | [OutFrame], State, hibernate} | {stop, State} 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>gun(3)</title> <link>https://ninenines.eu/docs/en/gun/1.0/manual/gun/</link> <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate> |
