<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
<title>Nine Nines: Cowboy User Guide</title>
<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
<link href="/css/99s.css?r=7" rel="stylesheet">
<link rel="shortcut icon" href="/img/ico/favicon.ico">
<link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/ico/apple-touch-icon-114.png">
<link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/ico/apple-touch-icon-72.png">
<link rel="apple-touch-icon-precomposed" href="/img/ico/apple-touch-icon-57.png">
</head>
<body class="">
<header id="page-head">
<div id="topbar" class="container">
<div class="row">
<div class="span2">
<h1 id="logo"><a href="/" title="99s">99s</a></h1>
</div>
<div class="span10">
<div id="side-header">
<nav>
<ul>
<li><a title="Hear my thoughts" href="/articles">Articles</a></li>
<li><a title="Watch my talks" href="/talks">Talks</a></li>
<li class="active"><a title="Read the docs" href="/docs">Documentation</a></li>
<li><a title="Request my services" href="/services">Consulting & Training</a></li>
</ul>
</nav>
<ul id="social">
<li>
<a href="https://github.com/ninenines" title="Check my Github repositories"><img src="/img/ico_github.png" data-hover="/img/ico_github_alt.png" alt="Github"></a>
</li>
<li>
<a title="Contact me" href="mailto:contact@ninenines.eu"><img src="/img/ico_mail.png" data-hover="/img/ico_mail_alt.png"></a>
</li>
</ul>
</div>
</div>
</div>
</div>
</header>
<div id="contents" class="two_col">
<div class="container">
<div class="row">
<div id="docs" class="span9 maincol">
<h1 class="lined-header"><span>Cowboy User Guide</span></h1>
<!-- REST: where should i handle bindings? init, probably. qs? in media type functions-->
<!-- REST: explain how a module per media type is good; module may be shared between client/server-->
<h2 id="_rationale">Rationale</h2>
<ul><li><a href="modern_web/">The modern Web</a>
</li>
<li><a href="erlang_web/">Erlang and the Web</a>
</li>
</ul>
<h2 id="_introduction">Introduction</h2>
<ul><li><a href="introduction/">Introduction</a>
</li>
<li><a href="getting_started/">Getting started</a>
</li>
<li><a href="flow_diagram/">Flow diagram</a>
</li>
</ul>
<h2 id="_configuration">Configuration</h2>
<ul><li><a href="listeners/">Listeners</a>
</li>
<li><a href="routing/">Routing</a>
</li>
<li><a href="constraints/">Constraints</a>
</li>
</ul>
<h2 id="_handlers">Handlers</h2>
<ul><li><a href="handlers/">Handlers</a>
</li>
<li><a href="loop_handlers/">Loop handlers</a>
</li>
<li><a href="static_files/">Static files</a>
</li>
</ul>
<h2 id="_request_and_response">Request and response</h2>
<ul><li><a href="req/">Request details</a>
</li>
<li><a href="req_body/">Reading the request body</a>
</li>
<li><a href="resp/">Sending a response</a>
</li>
<li><a href="cookies/">Using cookies</a>
</li>
<li><a href="multipart/">Multipart</a>
</li>
</ul>
<h2 id="_rest">REST</h2>
<ul><li><a href="rest_principles/">REST principles</a>
</li>
<li><a href="rest_handlers/">Handling REST requests</a>
</li>
<li><a href="rest_flowcharts/">REST flowcharts</a>
</li>
<li><a href="resource_design/">Designing a resource handler</a>
</li>
</ul>
<h2 id="_websocket">Websocket</h2>
<ul><li><a href="ws_protocol/">The Websocket protocol</a>
</li>
<li><a href="ws_handlers/">Websocket handlers</a>
</li>
</ul>
<h2 id="_advanced">Advanced</h2>
<ul><li><a href="streams/">Streams</a>
</li>
<li><a href="middlewares/">Middlewares</a>
</li>
<li><a href="performance/">Performance</a>
</li>
</ul>
<h2 id="_additional_information">Additional information</h2>
<ul><li><a href="migrating_from_2.11/">Migrating from Cowboy 2.11 to 2.12</a>
</li>
<li><a href="migrating_from_2.10/">Migrating from Cowboy 2.10 to 2.11</a>
</li>
<li><a href="migrating_from_2.9/">Migrating from Cowboy 2.9 to 2.10</a>
</li>
<li><a href="migrating_from_2.8/">Migrating from Cowboy 2.8 to 2.9</a>
</li>
<li><a href="migrating_from_2.7/">Migrating from Cowboy 2.7 to 2.8</a>
</li>
<li><a href="migrating_from_2.6/">Migrating from Cowboy 2.6 to 2.7</a>
</li>
<li><a href="migrating_from_2.5/">Migrating from Cowboy 2.5 to 2.6</a>
</li>
<li><a href="migrating_from_2.4/">Migrating from Cowboy 2.4 to 2.5</a>
</li>
<li><a href="migrating_from_2.3/">Migrating from Cowboy 2.3 to 2.4</a>
</li>
<li><a href="migrating_from_2.2/">Migrating from Cowboy 2.2 to 2.3</a>
</li>
<li><a href="migrating_from_2.1/">Migrating from Cowboy 2.1 to 2.2</a>
</li>
<li><a href="migrating_from_2.0/">Migrating from Cowboy 2.0 to 2.1</a>
</li>
<li><a href="migrating_from_1.0/">Migrating from Cowboy 1.0 to 2.0</a>
</li>
<li><a href="specs/">HTTP and other specifications</a>
</li>
</ul>
</div>
<div class="span3 sidecol">
<h3>
Cowboy
2.12
User Guide
</h3>
<ul>
<li><a href="/docs/en/cowboy/2.12/guide">User Guide</a></li>
<li><a href="/docs/en/cowboy/2.12/manual">Function Reference</a></li>
</ul>
<h4 id="docs-nav">Navigation</h4>
<h4>Version select</h4>
<ul>
<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
<li><a href="/docs/en/cowboy/2.8/guide">2.8</a></li>
<li><a href="/docs/en/cowboy/2.7/guide">2.7</a></li>
<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
</ul>
<h3 id="_like_my_work__donate">Like my work? Donate!</h3>
<p>Donate to Loïc Hoguin because his work on Cowboy, Ranch, Gun and Erlang.mk is fantastic:</p>
<form action="https://www.paypal.com/cgi-bin/webscr" method="post" style="display:inline">
<input type="hidden" name="cmd" value="_donations">
<input type="hidden" name="business" value="essen@ninenines.eu">
<input type="hidden" name="lc" value="FR">
<input type="hidden" name="item_name" value="Loic Hoguin">
<input type="hidden" name="item_number" value="99s">
<input type="hidden" name="currency_code" value="EUR">
<input type="hidden" name="bn" value="PP-DonationsBF:btn_donate_LG.gif:NonHosted">
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypalobjects.com/fr_FR/i/scr/pixel.gif" width="1" height="1">
</form><p>Recurring payment options are also available via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a>. These funds are used to cover the recurring expenses like food, dedicated servers or domain names.</p>
</div>
</div>
</div>
</div>
<footer>
<div class="container">
<div class="row">
<div class="span6">
<p id="scroll-top"><a href="#">↑ Scroll to top</a></p>
<nav>
<ul>
<li><a href="mailto:contact@ninenines.eu" title="Contact us">Contact us</a></li><li><a href="https://github.com/ninenines/ninenines.github.io" title="Github repository">Contribute to this site</a></li>
</ul>
</nav>
</div>
<div class="span6 credits">
<p><img src="/img/footer_logo.png"></p>
<p>Copyright © Loïc Hoguin 2012-2018</p>
</div>
</div>
</div>
</footer>
<script src="/js/custom.js"></script>
</body>
</html>