Cowboy 2.4.0

author: Loïc Hoguin <[email protected]> 2018-05-02 11:35:26 +0200
committer: Loïc Hoguin <[email protected]> 2018-05-02 11:35:26 +0200
commit: fec98300ec9af6c8b5f3120a60f217983c451076 (patch)
tree: 9772977293124e8b9b5b253e44d8c2695cddfb44 /docs/en/cowboy/2.4/manual/cowboy_handler/index.html
parent: bfd2b6e01cbb36b0be0b3c860f5baf8d5b49fe7a (diff)
download: ninenines.eu-fec98300ec9af6c8b5f3120a60f217983c451076.tar.gz
ninenines.eu-fec98300ec9af6c8b5f3120a60f217983c451076.tar.bz2
ninenines.eu-fec98300ec9af6c8b5f3120a60f217983c451076.zip
1 files changed, 234 insertions, 0 deletions
diff --git a/docs/en/cowboy/2.4/manual/cowboy_handler/index.html b/docs/en/cowboy/2.4/manual/cowboy_handler/index.html
new file mode 100644
index 00000000..189b508a
--- /dev/null
+++ b/docs/en/cowboy/2.4/manual/cowboy_handler/index.html
@@ -0,0 +1,234 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="">
+    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
+
+    <meta name="generator" content="Hugo 0.37.1" />
+
+    <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="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
+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">-&gt;</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">-&gt;</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
+	2.4
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/cowboy/2.4/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/cowboy/2.4/manual">Function Reference</a></li>
+	
+	
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+	
+	
+	
+		<li><a href="/docs/en/cowboy/2.4/manual">2.4</a></li>
+	
+		<li><a href="/docs/en/cowboy/2.3/manual">2.3</a></li>
+	
+		<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 &copy; Loïc Hoguin 2012-2018</p>
+            </div>
+          </div>
+        </div>
+      </footer>
+
+    
+    <script src="/js/custom.js"></script>
+  </body>
+</html>
+
+
author	Loïc Hoguin <[email protected]>	2018-05-02 11:35:26 +0200
committer	Loïc Hoguin <[email protected]>	2018-05-02 11:35:26 +0200
commit	fec98300ec9af6c8b5f3120a60f217983c451076 (patch)
tree	9772977293124e8b9b5b253e44d8c2695cddfb44 /docs/en/cowboy/2.4/manual/cowboy_handler/index.html
parent	bfd2b6e01cbb36b0be0b3c860f5baf8d5b49fe7a (diff)
download	ninenines.eu-fec98300ec9af6c8b5f3120a60f217983c451076.tar.gz ninenines.eu-fec98300ec9af6c8b5f3120a60f217983c451076.tar.bz2 ninenines.eu-fec98300ec9af6c8b5f3120a60f217983c451076.zip