<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> <!-- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> <title>mod_proxy_wstunnel - Apache HTTP Server Version 2.4</title> <link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> <link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> <link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> <script src="../style/scripts/prettify.min.js" type="text/javascript"> </script> <link href="../images/favicon.ico" rel="shortcut icon" /></head> <body> <div id="page-header"> <p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../images/feather.png" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> <div id="path"> <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> <div id="page-content"> <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> | <a href="../fr/mod/mod_proxy_wstunnel.html" hreflang="fr" rel="alternate" title="Français"> fr </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> <div class="warning"><h3><a id="deprecation" name="deprecation">Deprecation</a></h3> <p>Since Apache HTTP Server 2.4.47, protocol Upgrade (tunneling) can be better handled by <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code>.</p> <p>See <a href="mod_proxy.html#protoupgrade">Protocol Upgrade</a>.</p> </div> <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> The module can also be used to upgrade to other protocols than WebSocket, by setting the <var><a href="mod_proxy.html#upgrade">upgrade</a></var> parameter in the <code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code> directive to some custom protocol name. Special <code>upgrade=NONE</code> and <code>upgrade=ANY</code> values may be used for testing/forcing the upgrade but they are <strong>not recommended</strong> in production for security reasons. <code>NONE</code> means that the check for the header is omitted but still the upgrade/tunneling to WebSocket always happens. <code>ANY</code> means that the upgrade/tunneling will happen using any protocol asked by the client. </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> </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__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_proxy_wstunnel">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&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> <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <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> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_wstunnel.html" title="English"> en </a> | <a href="../fr/mod/mod_proxy_wstunnel.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> </div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. 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