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<div id="preamble"><h1>Apache Module mod_proxy_wstunnel</h1>
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<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_wstunnel.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_proxy_wstunnel.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
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<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>Proxying both HTTP and websockets at the same time, with a specific set of URL's being
websocket-only, can be done by specifying the websockets 
<code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code> directive before the
HTTP directive:</p>
<pre class="prettyprint lang-config">ProxyPassMatch ^/(myApp/ws)$  ws://backend.example.com:9080/$1
ProxyPass / http://backend.example.com:9080/</pre>


<p>Proxying both HTTP and websockets at the same time, where the websockets URL's are not
websocket-only or not known in advance can be done by using the
<code class="directive"><a href="../mod/mod_rewrite.html#rewriterule">RewriteRule</a></code> directive to
configure the websockets proxying:</p>
<pre class="prettyprint lang-config">ProxyPass / http://example.com:9080/
RewriteEngine on
RewriteCond %{HTTP:Upgrade} websocket [NC]
RewriteCond %{HTTP:Connection} upgrade [NC]
RewriteRule ^/?(.*) "ws://example.com:9080/$1" [P,L]</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>

<p>In fact the module can be used to upgrade to other protocols, you can set the <code>upgrade</code>
parameter in the <code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code>
directive to allow the module to accept other protocol.
NONE means you bypass the check for the header but still upgrade to WebSocket.
ANY means that <code>Upgrade</code> will read in the request headers and use
in the response <code>Upgrade</code></p>
</div>
<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#proxywebsocketfallbacktoproxyhttp">ProxyWebsocketFallbackToProxyHttp</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#proxywebsocketidletimeout">ProxyWebsocketIdleTimeout</a></li>
</ul>
<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_proxy_wstunnel">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_proxy_wstunnel">Report a bug</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>
<li><a href="#comments_section">Comments</a></li></ul></div>

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<div class="directive-section"><h2><a name="ProxyWebsocketFallbackToProxyHttp" id="ProxyWebsocketFallbackToProxyHttp">ProxyWebsocketFallbackToProxyHttp</a> <a name="proxywebsocketfallbacktoproxyhttp" id="proxywebsocketfallbacktoproxyhttp">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Instructs this module to let <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code> handle the request</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyWebsocketFallbackToProxyHttp On|Off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyWebsocketFallbackToProxyHttp On</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>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in httpd 2.4.48 and later</td></tr>
</table>
    <p>Since httpd 2.4.47, <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code> can handle WebSocket
    upgrading and tunneling in accordance to RFC 7230, this directive controls
    whether <code class="module"><a href="../mod/mod_proxy_wstunnel.html">mod_proxy_wstunnel</a></code> should hand over to
    <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code> to this, which is the case by default.</p>
    <p>Setting to <em>Off</em> lets <code class="module"><a href="../mod/mod_proxy_wstunnel.html">mod_proxy_wstunnel</a></code> handle
    WebSocket requests as in httpd 2.4.46 and earlier.</p>

</div>

<div class="directive-section"><h2><a name="ProxyWebsocketIdleTimeout" id="ProxyWebsocketIdleTimeout">ProxyWebsocketIdleTimeout</a> <a name="proxywebsocketidletimeout" id="proxywebsocketidletimeout">Directive</a> <a title="Permanent link" href="#proxywebsocketidletimeout" class="permalink">&para;</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. The timeout is considered in seconds by default, but
    it is possible to increase the time resolution to milliseconds
    adding the <em>ms</em> suffix.</p>

</div>

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