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25 <div id="preamble"><h1>Apache Module mod_proxy_fcgi</h1>
27 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_fcgi.html" title="English"> en </a></p>
29 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>FastCGI support module for
30 <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
31 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
32 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_fcgi_module</td></tr>
33 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_fcgi.c</td></tr>
34 <tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3 and later</td></tr></table>
37 <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
38 <a href="http://www.fastcgi.com/">FastCGI</a> protocol.</p>
40 <p>Thus, in order to get the ability of handling the <code>FastCGI</code>
41 protocol, <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and
42 <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> have to be present in the server.</p>
44 <p>Unlike <a href="http://httpd.apache.org/mod_fcgid/">mod_fcgid</a>
45 and <a href="http://www.fastcgi.com/">mod_fastcgi</a>,
46 <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> has no provision for starting the
47 application process; <code class="program"><a href="../programs/fcgistarter.html">fcgistarter</a></code> is provided
48 (on some platforms) for that purpose. Alternatively, external launching
49 or process management may be available in the FastCGI application
52 <div class="warning"><h3>Warning</h3>
53 <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
54 servers are dangerous both to your network and to the Internet at
58 <div id="quickview"><h3 class="directives">Directives</h3>
59 <p>This module provides no
63 <li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
64 <li><img alt="" src="../images/down.gif" /> <a href="#env">Environment Variables</a></li>
65 </ul><h3>See also</h3>
67 <li><code class="program"><a href="../programs/fcgistarter.html">fcgistarter</a></code></li>
68 <li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
69 </ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
70 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
72 <h2><a name="examples" id="examples">Examples</a></h2>
73 <p>Remember, in order to make the following examples work, you have to
74 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>
76 <div class="example"><h3>Single application instance</h3><pre class="prettyprint lang-config">ProxyPass /myapp/ fcgi://localhost:4000/</pre>
79 <p>This application should be able to handle multiple concurrent
80 connections. <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> enables connection reuse by
81 default, so after a request has been completed the connection will be
82 held open by that httpd child process and won't be reused until that
83 httpd process routes another request to the application. If the
84 FastCGI application is unable to handle enough concurrent connections
85 from httpd, requests can block waiting for the application to close
86 an existing connection. One way to resolve this is to disable connection
87 reuse on the <code class="directive">ProxyPass</code> directive, as shown in
88 the following example:</p>
90 <div class="example"><h3>Single application instance, no connection reuse</h3><pre class="prettyprint lang-config">ProxyPass /myapp/ fcgi://localhost:4000/ disablereuse=on</pre>
93 <p> The following example passes the request URI as a filesystem
94 path for the PHP-FPM daemon to run. The request URL is implicitly added
95 to the 2nd parameter. The hostname and port following fcgi:// are where
96 PHP-FPM is listening.</p>
97 <div class="example"><h3>PHP-FPM</h3><pre class="prettyprint lang-config">ProxyPassMatch ^/myapp/.*\.php(/.*)?$ fcgi://localhost:9000/var/www/</pre>
100 <p> The following example passes the request URI as a filesystem
101 path for the PHP-FPM daemon to run. In this case, PHP-FPM is listening on
102 a unix domain socket (UDS). Requires 2.4.9 or later. With this syntax,
103 the hostname and optional port following fci:// are ignored.</p>
104 <div class="example"><h3>PHP-FPM with UDS</h3><pre class="prettyprint lang-config">ProxyPassMatch ^/(.*\.php(/.*)?)$ "unix:/var/run/php5-fpm.sock|fcgi://localhost/var/www/"</pre>
107 <p>The balanced gateway needs <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code> and
108 at least one load balancer algorithm module, such as
109 <code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code>, in addition to the proxy
110 modules listed above. <code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code> is the
111 default, and will be used for this example configuration.</p>
113 <div class="example"><h3>Balanced gateway to multiple application instances</h3><pre class="prettyprint lang-config">ProxyPass /myapp/ balancer://myappcluster/
114 <Proxy balancer://myappcluster/>
115 BalancerMember fcgi://localhost:4000
116 BalancerMember fcgi://localhost:4001
120 <div class="example"><h3>Proxy via Handler</h3><p>You can also force a request to be handled as a reverse-proxy
121 request, by creating a suitable Handler pass-through. The example
122 configuration below will pass all requests for PHP scripts to the
123 specified FastCGI server using reverse proxy:
124 </p><pre class="prettyprint lang-config"><FilesMatch \.php$>
125 SetHandler "proxy:unix:/path/to/app.sock|fcgi://localhost/"
126 </FilesMatch></pre>
127 <p>This feature is available in Apache HTTP Server 2.4.10 and later. For performance
128 reasons, you will want to define a <a href="../mod_proxy.html#worker">worker</a>
129 representing the same fcgi:// backend.</p></div>
130 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
131 <div class="section">
132 <h2><a name="env" id="env">Environment Variables</a></h2>
133 <p>In addition to the configuration directives that control the
134 behaviour of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, there are a number of
135 <dfn>environment variables</dfn> that control the FCGI protocol
138 <dt>proxy-fcgi-pathinfo</dt>
139 <dd>By default <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> will neither create
140 nor export the <var>PATH_INFO</var> environment variable. This allows
141 the backend FCGI server to correctly determine <var>SCRIPT_NAME</var>
142 and <var>Script-URI</var> and be compliant with RFC 3875 section 3.3.
143 If instead you need <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> to generate
144 a "best guess" for <var>PATH_INFO</var>, set this env-var.
145 This is a workaround for a bug in some FCGI implementations.</dd>
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