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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>Topics</h3>
60 <li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
61 <li><img alt="" src="../images/down.gif" /> <a href="#env">Environment Variables</a></li>
62 </ul><h3 class="directives">Directives</h3>
63 <p>This module provides no
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 <li><code class="module"><a href="../mod/mod_authnz_fcgi.html">mod_authnz_fcgi</a></code></li>
70 </ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
71 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
73 <h2><a name="examples" id="examples">Examples</a></h2>
74 <p>Remember, in order to make the following examples work, you have to
75 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>
77 <div class="example"><h3>Single application instance</h3><pre class="prettyprint lang-config">ProxyPass "/myapp/" "fcgi://localhost:4000/"</pre>
80 <p> <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> disables connection reuse by
81 default, so after a request has been completed the connection will NOT be
82 held open by that httpd child process and won't be reused. If the
83 FastCGI application is able to handle concurrent connections
84 from httpd, you can opt-in to connection reuse as shown in the following
87 <div class="example"><h3>Single application instance, connection reuse</h3><pre class="prettyprint lang-config">ProxyPass "/myapp/" "fcgi://localhost:4000/" enablereuse=on</pre>
90 <p> The following example passes the request URI as a filesystem
91 path for the PHP-FPM daemon to run. The request URL is implicitly added
92 to the 2nd parameter. The hostname and port following fcgi:// are where
93 PHP-FPM is listening. Connection pooling is enabled.</p>
94 <div class="example"><h3>PHP-FPM</h3><pre class="prettyprint lang-config">ProxyPassMatch "^/myapp/.*\.php(/.*)?$" "fcgi://localhost:9000/var/www/" enablereuse=on</pre>
97 <p> The following example passes the request URI as a filesystem
98 path for the PHP-FPM daemon to run. In this case, PHP-FPM is listening on
99 a unix domain socket (UDS). Requires 2.4.9 or later. With this syntax,
100 the hostname and optional port following fcgi:// are ignored.</p>
101 <div class="example"><h3>PHP-FPM with UDS</h3><pre class="prettyprint lang-config"> # UDS does not currently support connection reuse
102 ProxyPassMatch "^/(.*\.php(/.*)?)$" "unix:/var/run/php5-fpm.sock|fcgi://localhost/var/www/"</pre>
105 <p>The balanced gateway needs <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code> and
106 at least one load balancer algorithm module, such as
107 <code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code>, in addition to the proxy
108 modules listed above. <code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code> is the
109 default, and will be used for this example configuration.</p>
111 <div class="example"><h3>Balanced gateway to multiple application instances</h3><pre class="prettyprint lang-config">ProxyPass "/myapp/" "balancer://myappcluster/"
112 <Proxy balancer://myappcluster/>
113 BalancerMember fcgi://localhost:4000
114 BalancerMember fcgi://localhost:4001
118 <p>You can also force a request to be handled as a reverse-proxy
119 request, by creating a suitable Handler pass-through. The example
120 configuration below will pass all requests for PHP scripts to the
121 specified FastCGI server using reverse proxy.
122 This feature is available in Apache HTTP Server 2.4.10 and later. For performance
123 reasons, you will want to define a <a href="mod_proxy.html#workers">worker</a>
124 representing the same fcgi:// backend. The benefit of this form is that it
125 allows the normal mapping of URI to filename to occur in the server, and the
126 local filesystem result is passed to the backend. When FastCGI is
127 configured this way, the server can calculate the most accurate
130 <div class="example"><h3>Proxy via Handler</h3><pre class="prettyprint lang-config"><FilesMatch "\.php$">
131 # Note: The only part that varies is /path/to/app.sock
132 SetHandler "proxy:unix:/path/to/app.sock|fcgi://localhost/"
134 # Define a matching worker.
135 # The part that is matched to the SetHandler is the part that
136 # follows the pipe. If you need to distinguish, "localhost; can
137 # be anything unique.
138 <Proxy fcgi://localhost/ enablereuse=on max=10>
141 <FilesMatch ...>
142 SetHandler "proxy:fcgi://localhost:9000"
145 <FilesMatch ...>
146 SetHandler "proxy:balancer://myappcluster/"
147 </FilesMatch></pre>
149 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
150 <div class="section">
151 <h2><a name="env" id="env">Environment Variables</a></h2>
152 <p>In addition to the configuration directives that control the
153 behaviour of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, there are a number of
154 <dfn>environment variables</dfn> that control the FCGI protocol
157 <dt>proxy-fcgi-pathinfo</dt>
158 <dd>When configured via <code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code> or <code class="directive"><a href="../mod/mod_proxy.html#proxypassmatch">ProxyPassMatch</a></code>, <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> will not
159 set the <var>PATH_INFO</var> environment variable. This allows
160 the backend FCGI server to correctly determine <var>SCRIPT_NAME</var>
161 and <var>Script-URI</var> and be compliant with RFC 3875 section 3.3.
162 If instead you need <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> to generate
163 a "best guess" for <var>PATH_INFO</var>, set this env-var.
164 This is a workaround for a bug in some FCGI implementations. This
165 variable can be set to multiple values to tweak at how the best guess
169 <dd>PATH_INFO is split from the slash following the
170 <em>first</em> "." in the URL.</dd>
172 <dd>PATH_INFO is split from the slash following the
173 <em>last</em> "." in the URL.</dd>
175 <dd>PATH_INFO is calculated by an attempt to map the URL to the
176 local filesystem.</dd>
178 <dd>PATH_INFO is the path component of the URL, unescaped /
180 <dt>any other value</dt>
181 <dd>PATH_INFO is the same as the path component of the URL.
182 Originally, this was the only proxy-fcgi-pathinfo option.</dd>
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