summaryrefslogblamecommitdiffstats
path: root/docs/en/cowboy/2.6/manual/cowboy.start_clear/index.html
blob: 61952368931558ad29959c026676572170829e22 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12











                                                                                                                      
                                                   





                                                                                                      
               













































                                                                                                                                                                                   
                                                                                         




































                                                                                                                                                                                                                         
                                                               













                                                                                                                                                                                                                                                                          
                                                               















































                                                                                                                                                                                                 

                                                                       

                                                                     

                                                                     

                                                                     



                                                                     

     











                                                                                                                                                                   
                                                                                                                                                                                                                                  


 





























                                                                                                                                                                                                                           
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="">
    <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">

    <title>Nine Nines: cowboy:start_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=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:[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>

<h2 id="_name">Name</h2>
<p>cowboy:start_clear - Listen for connections using plain TCP</p>
<h2 id="_description">Description</h2>
<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><b><font color="#000000">start_clear</font></b>(<font color="#009900">Name</font>          <font color="#990000">::</font> <b><font color="#000000">ranch:ref</font></b>(),
            <font color="#009900">TransportOpts</font> <font color="#990000">::</font> <b><font color="#000000">ranch_tcp:opts</font></b>(),
            <font color="#009900">ProtocolOpts</font>  <font color="#990000">::</font> <b><font color="#000000">opts</font></b>())
    <font color="#990000">-&gt;</font> {<font color="#FF6600">ok</font>, <font color="#009900">ListenerPid</font> <font color="#990000">::</font> <b><font color="#000080">pid</font></b>()}
     | {<font color="#FF6600">error</font>, <b><font color="#000000">any</font></b>()}</tt></pre>
</div></div>
<p>Start listening for connections over a clear TCP channel.</p>
<p>Both HTTP/1.1 and HTTP/2 are supported on this listener. HTTP/2 has two methods of establishing a connection over a clear TCP channel. Both the upgrade and the prior knowledge methods are supported.</p>
<h2 id="_arguments">Arguments</h2>
<dl><dt>Name</dt>
<dd><p>The listener name is used to refer to this listener in future calls, for example when stopping it or when updating the routes defined.</p>
<p>It can be any Erlang term. An atom is generally good enough, for example <code>api</code>, <code>my_app_clear</code> or <code>my_app_tls</code>.</p>
</dd>
<dt>TransportOpts</dt>
<dd><p>The transport options are where the TCP options, including the listener&apos;s port number, are defined. Transport options are provided as a list of keys and values, for example <code>[{port, 8080}]</code>.</p>
<p>The available options are documented in the <a href="../ranch_tcp">ranch_tcp(3)</a> manual.</p>
</dd>
<dt>ProtocolOpts</dt>
<dd><p>The protocol options are in a map containing all the options for the different protocols that may be involved when connecting to the listener, including HTTP/1.1 and HTTP/2.</p>
<p>The HTTP/1.1 options are documented in the <a href="../cowboy_http">cowboy_http(3)</a> manual; and the HTTP/2 options in <a href="../cowboy_http2">cowboy_http2(3)</a>.</p>
</dd>
</dl>
<h2 id="_return_value">Return value</h2>
<p>An ok tuple is returned on success. It contains the pid of the top-level supervisor for the listener.</p>
<p>An error tuple is returned on error. The error reason may be any Erlang term.</p>
<p>A common error is <code>eaddrinuse</code>. It indicates that the port configured for Cowboy is already in use.</p>
<h2 id="_changelog">Changelog</h2>
<ul><li><strong>2.0</strong>: HTTP/2 support added.
</li>
<li><strong>2.0</strong>: Function introduced. Replaces <code>cowboy:start_http/4</code>.
</li>
</ul>
<h2 id="_examples">Examples</h2>
<div class="listingblock"><div class="title">Start a listener</div>
<div class="content"><!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><font color="#009900">Dispatch</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_router:compile</font></b>([
    {<font color="#FF6600">'_'</font>, [
        {<font color="#FF0000">"/"</font>, <font color="#FF6600">toppage_h</font>, []}
    ]}
]),

{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_clear</font></b>(<font color="#FF6600">example</font>, [{<font color="#FF6600">port</font>, <font color="#993399">8080</font>}], #{
    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
})<font color="#990000">.</font></tt></pre>
</div></div>
<div class="listingblock"><div class="title">Start a listener on a random port</div>
<div class="content"><!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><font color="#009900">Name</font> <font color="#990000">=</font> <font color="#FF6600">example</font>,

{<font color="#FF6600">ok</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">cowboy:start_clear</font></b>(<font color="#009900">Name</font>, [], #{
    <font color="#0000FF">env</font> <font color="#990000">=&gt;</font> #{<font color="#0000FF">dispatch</font> <font color="#990000">=&gt;</font> <font color="#009900">Dispatch</font>}
}),

<font color="#009900">Port</font> <font color="#990000">=</font> <b><font color="#000000">ranch:get_port</font></b>(<font color="#009900">Name</font>)<font color="#990000">.</font></tt></pre>
</div></div>
<h2 id="_see_also">See also</h2>
<p><a href="../cowboy">cowboy(3)</a>, <a href="../cowboy.start_tls">cowboy:start_tls(3)</a>, <a href="../cowboy.stop_listener">cowboy:stop_listener(3)</a>, <a href="../ranch">ranch(3)</a></p>






</div>

<div class="span3 sidecol">


<h3>
	Cowboy
	2.6
	Function Reference
	
</h3>

<ul>
	
		<li><a href="/docs/en/cowboy/2.6/guide">User Guide</a></li>
	
	
		<li><a href="/docs/en/cowboy/2.6/manual">Function Reference</a></li>
	
	
</ul>

<h4 id="docs-nav">Navigation</h4>

<h4>Version select</h4>
<ul>
	
	
	
		<li><a href="/docs/en/cowboy/2.10/manual">2.10</a></li>
	
		<li><a href="/docs/en/cowboy/2.9/manual">2.9</a></li>
	
		<li><a href="/docs/en/cowboy/2.8/manual">2.8</a></li>
	
		<li><a href="/docs/en/cowboy/2.7/manual">2.7</a></li>
	
		<li><a href="/docs/en/cowboy/2.6/manual">2.6</a></li>
	
		<li><a href="/docs/en/cowboy/2.5/manual">2.5</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="[email protected]">
<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:[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>