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348 lines
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<?xml version="1.0" encoding="ISO-8859-1"?>
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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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<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" />
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<!--
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This file is generated from xml source: DO NOT EDIT
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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-->
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<title>mod_proxy_fcgi - Apache HTTP Server Version 2.5</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.min.js" type="text/javascript">
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</script>
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||
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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.png" /></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> |
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<a href="../fr/mod/mod_proxy_fcgi.html" hreflang="fr" rel="alternate" title="Fran<61>ais"> fr </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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||
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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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||
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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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||
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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>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 class="directives">Directives</h3>
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<ul id="toc">
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<li><img alt="" src="../images/down.gif" /> <a href="#proxyfcgibackendtype">ProxyFCGIBackendType</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#proxyfcgisetenvif">ProxyFCGISetEnvIf</a></li>
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||
</ul>
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<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_fcgi">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_proxy_fcgi">Report a bug</a></li></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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<li><code class="module"><a href="../mod/mod_authnz_fcgi.html">mod_authnz_fcgi</a></code></li>
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||
<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">ProxyPass "/myapp/" "fcgi://localhost:4000/"</pre>
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</div>
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<p> <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> disables connection reuse by
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default, so after a request has been completed the connection will NOT be
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held open by that httpd child process and won't be reused. If the
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FastCGI application is able to handle concurrent connections
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from httpd, you can opt-in to connection reuse as shown in the following
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||
example:</p>
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<div class="example"><h3>Single application instance, connection reuse (2.4.11 and later)</h3><pre class="prettyprint lang-config">ProxyPass "/myapp/" "fcgi://localhost:4000/" enablereuse=on</pre>
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</div>
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<p> The following example passes the request URI as a filesystem
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path for the PHP-FPM daemon to run. The request URL is implicitly added
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to the 2nd parameter. The hostname and port following fcgi:// are where
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PHP-FPM is listening. Connection pooling/reuse is enabled.</p>
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<div class="example"><h3>PHP-FPM</h3><pre class="prettyprint lang-config">ProxyPassMatch "^/myapp/.*\.php(/.*)?$" "fcgi://localhost:9000/var/www/" enablereuse=on</pre>
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</div>
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<p> The following example passes the request URI as a filesystem
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path for the PHP-FPM daemon to run. In this case, PHP-FPM is listening on
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a unix domain socket (UDS). Requires 2.4.9 or later. With this syntax,
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the hostname and optional port following fcgi:// are ignored.</p>
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<div class="example"><h3>PHP-FPM with UDS</h3><pre class="prettyprint lang-config">ProxyPassMatch "^/(.*\.php(/.*)?)$" "unix:/var/run/php5-fpm.sock|fcgi://localhost/var/www/"</pre>
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</div>
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<p> The following example forces the module to flush every chunk of data received
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from the FCGI backend as soon as it receives it, without buffering.</p>
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<div class="example"><h3>Force flush of FCGI data without buffering</h3><pre class="prettyprint lang-config">ProxyPassMatch "^/myapp/.*\.php(/.*)?$" "fcgi://localhost:9000/var/www/" enablereuse=on flushpackets=on</pre>
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</div>
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<p> The following example is related to the previous one with a difference: the module waits/polls
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for a fixed amount of time before flushing (buffering data from the FCGI backend).
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This method is useful when the FCGI backend emits data in short bursts, since
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||
forcing a flush would result inefficient and expensive for performances. Please note
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||
that this setting might not be the best one in use cases when outgoing data chunks
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||
from the FCGI application are blocked waiting on incoming chunks from the client.
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||
</p>
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||
<div class="example"><h3>Force flush of FCGI data buffering for 20ms</h3><pre class="prettyprint lang-config">ProxyPassMatch "^/myapp/.*\.php(/.*)?$" "fcgi://localhost:9000/var/www/" flushpackets=on flushwait=20</pre>
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||
</div>
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||
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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">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></pre>
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||
</div>
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<p>You can also force a request to be handled as a reverse-proxy
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||
request, by creating a suitable Handler pass-through. The example
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||
configuration below will pass all requests for PHP scripts to the
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||
specified FastCGI server using reverse proxy.
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This feature is available in Apache HTTP Server 2.4.10 and later. For performance
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reasons, you will want to define a <a href="mod_proxy.html#workers">worker</a>
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||
representing the same fcgi:// backend. The benefit of this form is that it
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allows the normal mapping of URI to filename to occur in the server, and the
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local filesystem result is passed to the backend. When FastCGI is
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||
configured this way, the server can calculate the most accurate
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||
PATH_INFO.
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||
</p>
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||
<div class="example"><h3>Proxy via Handler</h3><pre class="prettyprint lang-config"><FilesMatch "\.php$">
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# Note: The only part that varies is /path/to/app.sock
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SetHandler "proxy:unix:/path/to/app.sock|fcgi://localhost/"
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</FilesMatch>
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||
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||
# Define a matching worker.
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||
# The part that is matched to the SetHandler is the part that
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||
# follows the pipe. If you need to distinguish, "localhost; can
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||
# be anything unique.
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<Proxy "fcgi://localhost/" enablereuse=on max=10>
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</Proxy>
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<FilesMatch ...>
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SetHandler "proxy:fcgi://localhost:9000"
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</FilesMatch>
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<FilesMatch ...>
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SetHandler "proxy:balancer://myappcluster/"
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||
</FilesMatch></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>
|
||
<div class="section">
|
||
<h2><a name="env" id="env">Environment Variables</a></h2>
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||
<p>In addition to the configuration directives that control the
|
||
behaviour of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, there are a number of
|
||
<dfn>environment variables</dfn> that control the FCGI protocol
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||
provider:</p>
|
||
<dl>
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||
<dt>proxy-fcgi-pathinfo</dt>
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||
<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
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||
set the <var>PATH_INFO</var> environment variable. This allows
|
||
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.
|
||
If instead you need <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> to generate
|
||
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. This
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||
variable can be set to multiple values to tweak at how the best guess
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||
is chosen (In 2.4.11 and later only):
|
||
<dl>
|
||
<dt>first-dot</dt>
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||
<dd>PATH_INFO is split from the slash following the
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||
<em>first</em> "." in the URL.</dd>
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||
<dt>last-dot</dt>
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||
<dd>PATH_INFO is split from the slash following the
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||
<em>last</em> "." in the URL.</dd>
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||
<dt>full</dt>
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||
<dd>PATH_INFO is calculated by an attempt to map the URL to the
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||
local filesystem.</dd>
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<dt>unescape</dt>
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||
<dd>PATH_INFO is the path component of the URL, unescaped /
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decoded.</dd>
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<dt>any other value</dt>
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<dd>PATH_INFO is the same as the path component of the URL.
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Originally, this was the only proxy-fcgi-pathinfo option.</dd>
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</dl>
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||
</dd>
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</dl>
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||
</div>
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||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ProxyFCGIBackendType" id="ProxyFCGIBackendType">ProxyFCGIBackendType</a> <a name="proxyfcgibackendtype" id="proxyfcgibackendtype">Directive</a></h2>
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<table class="directive">
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||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify the type of backend FastCGI application</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFCGIBackendType FPM|GENERIC</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyFCGIBackendType FPM</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
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||
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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||
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_fcgi</td></tr>
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||
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.26 and later</td></tr>
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||
</table>
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||
<p>This directive allows the type of backend FastCGI application to be
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||
specified. Some FastCGI servers, such as PHP-FPM, use historical quirks of
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environment variables to identify the type of proxy server being used. Set
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||
this directive to "GENERIC" if your non PHP-FPM application has trouble
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||
interpreting environment variables such as SCRIPT_FILENAME or PATH_TRANSLATED
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||
as set by the server.</p>
|
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<p>One example of values that change based on the setting of this directive is
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SCRIPT_FILENAME. When using <code class="module"><a href="../mod/mod_proxy_fcgi.html">mod_proxy_fcgi</a></code> historically,
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||
SCRIPT_FILENAME was prefixed with the string "proxy:fcgi://". This variable is
|
||
what some generic FastCGI applications would read as their script input, but
|
||
PHP-FPM would strip the prefix then remember it was talking to Apache. In
|
||
2.4.21 through 2.4.25, this prefix was automatically stripped by the server,
|
||
breaking the ability of PHP-FPM to detect and interoperate with Apache in some
|
||
scenarios.</p>
|
||
|
||
</div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ProxyFCGISetEnvIf" id="ProxyFCGISetEnvIf">ProxyFCGISetEnvIf</a> <a name="proxyfcgisetenvif" id="proxyfcgisetenvif">Directive</a></h2>
|
||
<table class="directive">
|
||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Allow variables sent to FastCGI servers to be fixed up</td></tr>
|
||
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFCGISetEnvIf <var>conditional-expression</var>
|
||
[!]<var>environment-variable-name</var>
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||
[<var>value-expression</var>]</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
|
||
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</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_fcgi</td></tr>
|
||
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.26 and later</td></tr>
|
||
</table>
|
||
<p>Just before passing a request to the configured FastCGI server, the core of
|
||
the web server sets a number of environment variables based on details of the
|
||
current request. FastCGI programs often uses these environment variables
|
||
as inputs that determine what underlying scripts they will process, or what
|
||
output they directly produce.</p>
|
||
<p>Examples of noteworthy environment variables are:</p>
|
||
<ul>
|
||
<li>SCRIPT_NAME</li>
|
||
<li>SCRIPT_FILENAME</li>
|
||
<li>REQUEST_URI</li>
|
||
<li>PATH_INFO</li>
|
||
<li>PATH_TRANSLATED</li>
|
||
</ul>
|
||
|
||
<p>This directive allows the environment variables above, or any others of
|
||
interest, to be overridden. This directive is evaluated after the initial
|
||
values for these variables are set, so they can be used as input into both
|
||
the condition expressions and value expressions.</p>
|
||
<p>Parameter syntax:</p>
|
||
<dl>
|
||
<dt>conditional-expression</dt>
|
||
<dd>Specifies an expression that controls whether the environment variable that
|
||
follows will be modified. For information on the expression syntax, see
|
||
the examples that follow or the full specification at the
|
||
<a href="../expr.html">ap_expr</a> documentation.
|
||
</dd>
|
||
<dt>environment-variable-name</dt>
|
||
<dd> Specifies the CGI environment variable to change,
|
||
such as PATH_INFO. If preceded by an exclamation point, the variable
|
||
will be unset.</dd>
|
||
<dt>value-expression</dt>
|
||
<dd>Specifies the replacement value for the preceding environment variable.
|
||
Backreferences, such as "$1", can be included from regular expression
|
||
captures in <var>conditional-expression</var>. If omitted, the variable is
|
||
set (or overridden) to an empty string — but see the Note below.</dd>
|
||
</dl>
|
||
|
||
<div class="example"><pre class="prettyprint lang-config"># A basic, unconditional override
|
||
ProxyFCGISetEnvIf "true" PATH_INFO "/example"
|
||
|
||
# Use an environment variable in the value
|
||
ProxyFCGISetEnvIf "true" PATH_INFO "%{reqenv:SCRIPT_NAME}"
|
||
|
||
# Use captures in the conditions and backreferences in the replacement
|
||
ProxyFCGISetEnvIf "reqenv('PATH_TRANSLATED') =~ m|(/.*prefix)(\d+)(.*)|" PATH_TRANSLATED "$1$3"</pre>
|
||
</div>
|
||
|
||
<div class="note"><h3>Note: Unset vs. Empty</h3>
|
||
The following will unset <code>VARIABLE</code>, preventing it from being sent
|
||
to the FastCGI server:
|
||
|
||
<pre class="prettyprint lang-config">ProxyFCGISetEnvIf true !VARIABLE</pre>
|
||
|
||
|
||
Whereas the following will erase any existing <em>value</em> of
|
||
<code>VARIABLE</code> (by setting it to the empty string), but the empty
|
||
<code>VARIABLE</code> will still be sent to the server:
|
||
|
||
<pre class="prettyprint lang-config">ProxyFCGISetEnvIf true VARIABLE</pre>
|
||
|
||
|
||
The CGI/1.1 specification
|
||
<a href="https://tools.ietf.org/html/rfc3875#section-4.1">does not
|
||
distinguish</a> between a variable with an empty value and a variable that
|
||
does not exist. However, many CGI and FastCGI implementations distinguish (or
|
||
allow scripts to distinguish) between the two. The choice of which to use is
|
||
dependent upon your implementation and your reason for modifying the variable.
|
||
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|
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