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156 lines
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
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This file is generated from xml source: DO NOT EDIT
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-->
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<title>mod_proxy_fcgi - Apache HTTP Server</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
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<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" />
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<script src="../style/scripts/prettify.js" type="text/javascript">
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</script>
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<link href="../images/favicon.ico" rel="shortcut icon" /></head>
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<body>
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<div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.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>
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<p class="apache">Apache HTTP Server Version 2.5</p>
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<img alt="" src="../images/feather.gif" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<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 2.5</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_proxy_fcgi</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_fcgi.html" title="English"> en </a></p>
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</div>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>FastCGI support module for
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<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module<EFBFBD>Identifier:</a></th><td>proxy_fcgi_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source<EFBFBD>File:</a></th><td>mod_proxy_fcgi.c</td></tr>
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<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3 and later</td></tr></table>
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<h3>Summary</h3>
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<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
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<a href="http://www.fastcgi.com/">FastCGI</a> protocol.</p>
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<p>Thus, in order to get the ability of handling the <code>FastCGI</code>
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protocol, <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and
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<code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> have to be present in the server.</p>
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<p>Unlike <a href="http://httpd.apache.org/mod_fcgid/">mod_fcgid</a>
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and <a href="http://www.fastcgi.com/">mod_fastcgi</a>,
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<code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> has no provision for starting the
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application process; <code class="program"><a href="../programs/fcgistarter.html">fcgistarter</a></code> is provided
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(on some platforms) for that purpose. Alternatively, external launching
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or process management may be available in the FastCGI application
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framework in use.</p>
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<div class="warning"><h3>Warning</h3>
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<p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
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servers are dangerous both to your network and to the Internet at
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large.</p>
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</div>
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</div>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<p>This module provides no
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directives.</p>
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<h3>Topics</h3>
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<ul id="topics">
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<li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#env">Environment Variables</a></li>
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</ul><h3>See also</h3>
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<ul class="seealso">
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<li><code class="program"><a href="../programs/fcgistarter.html">fcgistarter</a></code></li>
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<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
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</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="examples" id="examples">Examples</a></h2>
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<p>Remember, in order to make the following examples work, you have to
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enable <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code>.</p>
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<div class="example"><h3>Single application instance</h3><pre class="prettyprint lang-config">
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ProxyPass /myapp/ fcgi://localhost:4000/
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</pre>
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</div>
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<p>This application should be able to handle multiple concurrent
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connections. <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> enables connection reuse by
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default, so after a request has been completed the connection will be
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held open by that httpd child process and won't be reused until that
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httpd process routes another request to the application. If the
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FastCGI application is unable to handle enough concurrent connections
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from httpd, requests can block waiting for the application to close
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an existing connection. One way to resolve this is to disable connection
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reuse on the <code class="directive">ProxyPass</code> directive, as shown in
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the following example:</p>
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<div class="example"><h3>Single application instance, no connection reuse</h3><pre class="prettyprint lang-config">
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ProxyPass /myapp/ fcgi://localhost:4000/ disablereuse=on
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</pre>
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</div>
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<p>The balanced gateway needs <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code> and
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at least one load balancer algorithm module, such as
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<code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code>, in addition to the proxy
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modules listed above. <code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code> is the
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default, and will be used for this example configuration.</p>
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<div class="example"><h3>Balanced gateway to multiple application instances</h3><pre class="prettyprint lang-config">
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ProxyPass /myapp/ balancer://myappcluster/
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<Proxy balancer://myappcluster/>
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BalancerMember fcgi://localhost:4000
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BalancerMember fcgi://localhost:4001
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</Proxy>
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</pre>
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</div>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="env" id="env">Environment Variables</a></h2>
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<p>In addition to the configuration directives that control the
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behaviour of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, there are a number of
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<dfn>environment variables</dfn> that control the FCGI protocol
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provider:</p>
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<dl>
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<dt>proxy-fcgi-pathinfo</dt>
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<dd>By default <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> will neither create
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nor export the <var>PATH_INFO</var> environment variable. This allows
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the backend FCGI server to correctly determine <var>SCRIPT_NAME</var>
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and <var>Script-URI</var> and be compliant with RFC 3875 section 3.3.
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If instead you need <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> to generate
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a "best guess" for <var>PATH_INFO</var>, set this env-var.
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This is a workaround for a bug in some FCGI implementations.</dd>
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</dl>
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</div>
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</div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_fcgi.html" title="English"> en </a></p>
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</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. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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<p class="apache">Copyright 2013 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.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></div><script type="text/javascript"><!--//--><![CDATA[//><!--
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