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<h1 class="lined-header"><span>ranch:recv_proxy_header(3)</span></h1>
<h2 id="_name">Name</h2>
<p>ranch:recv_proxy_header - Receive the PROXY protocol header</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">recv_proxy_header</font></b>(<b><font color="#000000">ranch:ref</font></b>(), <b><font color="#000000">timeout</font></b>())
<font color="#990000">-></font> {<font color="#FF6600">ok</font>, <b><font color="#000000">ranch_proxy_header:proxy_info</font></b>()}
| {<font color="#FF6600">error</font>, <font color="#009900">Reason</font> <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()}
| {<font color="#FF6600">error</font>, <font color="#FF6600">protocol_error</font>, <font color="#009900">HumanReadable</font> <font color="#990000">::</font> <b><font color="#000080">atom</font></b>()}</tt></pre>
</div></div>
<p>Receive the PROXY protocol header.</p>
<p>This function must be called before <code>ranch:handshake/1,2</code> on newly accepted connections to read and parse the PROXY protocol header, if any.</p>
<h2 id="_arguments">Arguments</h2>
<dl><dt>Ref</dt>
<dd><p>The listener name.</p>
</dd>
<dt>Timeout</dt>
<dd><p>Receive timeout in milliseconds.</p>
</dd>
</dl>
<h2 id="_return_value">Return value</h2>
<p>An <code>ok</code> tuple is returned containing PROXY header information on success.</p>
<p>An <code>error</code> 2-tuple is returned when a socket error occurs.</p>
<p>An <code>error</code> 3-tuple is returned when a protocol error occurs and Ranch was not able to parse the PROXY header information. The third element contains a human-readable description of the error.</p>
<h2 id="_changelog">Changelog</h2>
<ul><li><strong>1.7</strong>: Function introduced.
</li>
</ul>
<h2 id="_examples">Examples</h2>
<div class="listingblock"><div class="title">Receive the PROXY protocol header</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><b><font color="#000000">start_link</font></b>(<font color="#009900">Ref</font>, <font color="#990000">_</font>, <font color="#009900">Transport</font>, <font color="#009900">Opts</font>) <font color="#990000">-></font>
<font color="#009900">Pid</font> <font color="#990000">=</font> <b><font color="#000000">proc_lib:spawn_link</font></b>(<b><font color="#000080">?MODULE</font></b>, <font color="#FF6600">init</font>,
[<font color="#009900">Ref</font>, <font color="#009900">Transport</font>, <font color="#009900">Opts</font>]),
{<font color="#FF6600">ok</font>, <font color="#009900">Pid</font>}<font color="#990000">.</font>
<b><font color="#000000">init</font></b>(<font color="#009900">Ref</font>, <font color="#009900">Transport</font>, <font color="#009900">Opts</font>) <font color="#990000">-></font>
{<font color="#FF6600">ok</font>, <font color="#009900">ProxyInfo</font>} <font color="#990000">=</font> <b><font color="#000000">ranch:recv_proxy_header</font></b>(<font color="#009900">Ref</font>, <font color="#993399">1000</font>),
{<font color="#FF6600">ok</font>, <font color="#009900">Socket</font>} <font color="#990000">=</font> <b><font color="#000000">ranch:handshake</font></b>(<font color="#009900">Ref</font>),
<b><font color="#000000">loop</font></b>(<font color="#008080">#state</font>{<font color="#0000FF">ref</font><font color="#990000">=</font><font color="#009900">Ref</font>, <font color="#0000FF">socket</font><font color="#990000">=</font><font color="#009900">Socket</font>, <font color="#0000FF">transport</font><font color="#990000">=</font><font color="#009900">Transport</font>,
<font color="#0000FF">proxy_info</font><font color="#990000">=</font><font color="#009900">ProxyInfo</font>, <font color="#0000FF">opts</font><font color="#990000">=</font><font color="#009900">Opts</font>})<font color="#990000">.</font></tt></pre>
</div></div>
<h2 id="_see_also">See also</h2>
<p><a href="../ranch.start_listener">ranch:start_listener(3)</a>, <a href="../ranch.handshake">ranch:handshake(3)</a>, <a href="../ranch.remove_connection">ranch:remove_connection(3)</a>, <a href="../ranch">ranch(3)</a></p>
</div>
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<h3>
Ranch
1.7
Function Reference
</h3>
<ul>
<li><a href="/docs/en/ranch/1.7/guide">User Guide</a></li>
<li><a href="/docs/en/ranch/1.7/manual">Function Reference</a></li>
</ul>
<h4 id="docs-nav">Navigation</h4>
<h4>Version select</h4>
<ul>
<li><a href="/docs/en/ranch/2.0/manual">2.0</a></li>
<li><a href="/docs/en/ranch/1.7/manual">1.7</a></li>
<li><a href="/docs/en/ranch/1.6/manual">1.6</a></li>
<li><a href="/docs/en/ranch/1.5/manual">1.5</a></li>
<li><a href="/docs/en/ranch/1.4/manual">1.4</a></li>
</ul>
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