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<title>mod_proxy_wstunnel - Apache HTTP Server Version 2.5</title>
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<div id="preamble"><h1>Apache Module mod_proxy_wstunnel</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_wstunnel.html" title="English"> en </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Websockets support module for
<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>proxy_wstunnel_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_proxy_wstunnel.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in httpd 2.4.5 and later</td></tr></table>
<h3>Summary</h3>
<p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. It provides support for the tunnelling of web
socket connections to a backend websockets server. The connection
is automatically upgraded to a websocket connection:</p>
<div class="example"><h3>HTTP Response</h3><pre class="prettyprint lang-config">Upgrade: WebSocket
Connection: Upgrade</pre>
</div>
<p>Proxying requests to a websockets server like <code>echo.websocket.org</code> can be done using the
<code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code> directive:</p>
<pre class="prettyprint lang-config">ProxyPass "/ws2/" "ws://echo.websocket.org/"
ProxyPass "/wss2/" "wss://echo.websocket.org/"</pre>
<p>Load balancing for multiple backends can be achieved using <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code>.</p>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#proxywebsocketasync">ProxyWebsocketAsync</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#proxywebsocketasyncdelay">ProxyWebsocketAsyncDelay</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#proxywebsocketidletimeout">ProxyWebsocketIdleTimeout</a></li>
</ul>
<h3>See also</h3>
<ul class="seealso">
<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="directive-section"><h2><a name="ProxyWebsocketAsync" id="ProxyWebsocketAsync">ProxyWebsocketAsync</a> <a name="proxywebsocketasync" id="proxywebsocketasync">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Instructs this module to try to create an asynchronous tunnel</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyWebsocketAsync ON|OFF</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_wstunnel</td></tr>
</table>
<p>This directive instructs the server to try to create an asynchronous tunnel.
If the current MPM does not support the necessary features, a synchronous
tunnel is used.</p>
<div class="note"><h3>Note</h3><p>Async support is experimental and subject
to change.</p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ProxyWebsocketAsyncDelay" id="ProxyWebsocketAsyncDelay">ProxyWebsocketAsyncDelay</a> <a name="proxywebsocketasyncdelay" id="proxywebsocketasyncdelay">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the amount of time the tunnel waits synchronously for data</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyWebsocketAsyncDelay <var>num</var>[ms]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyWebsocketAsyncDelay 0</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_wstunnel</td></tr>
</table>
<p>If <code class="directive">ProxyWebsocketAsync</code> is enabled, this directive
controls how long the server synchronously waits for more data.</p>
<div class="note"><h3>Note</h3><p>Async support is experimental and subject
to change. </p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ProxyWebsocketIdleTimeout" id="ProxyWebsocketIdleTimeout">ProxyWebsocketIdleTimeout</a> <a name="proxywebsocketidletimeout" id="proxywebsocketidletimeout">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the maximum amount of time to wait for data on the websockets tunnel</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyWebsocketIdleTimeout <var>num</var>[ms]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyWebsocketIdleTimeout 0</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_wstunnel</td></tr>
</table>
<p>This directive imposes a maximum amount of time for the tunnel to be
left open while idle.</p>
</div>
</div>
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