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fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<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 2.3</a> > <a href="./">Modules</a></div>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<div id="preamble"><h1>Apache Module mod_proxy_fdpass</h1>
f086b4b402fa9a2fefc7dda85de2a3cc1cd0a654rjung<p><span>Available Languages: </span><a href="/en/mod/mod_proxy_fdpass.html" title="English"> en </a></p>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>fdpass external process support module for
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code></td></tr>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>proxy_fdpass_module</td></tr>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_proxy_fdpass.c</td></tr>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available for unix in version 2.3 and later</td></tr></table>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe <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 passing the socket of the
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe client to another process.</p>
9a58dc6a2b26ec128b1270cf48810e705f1a90dbsf <p><code>mod_proxy_fdpass</code> uses the ability of AF_UNIX domain
9a58dc6a2b26ec128b1270cf48810e705f1a90dbsf sockets to <a href="http://www.freebsd.org/cgi/man.cgi?query=recv">pass an
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe open file descriptor</a> to allow another process to finish handling a request.
9a58dc6a2b26ec128b1270cf48810e705f1a90dbsf <p>The module has a <code>proxy_fdpass_flusher</code> provider interface,
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe which allows another module to optionally send the response headers, or even
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe the start of the response body. The default flush provider disables keep-alive,
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe and sends the response headers, letting the external process just send a
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe response body.</p>
9a58dc6a2b26ec128b1270cf48810e705f1a90dbsf <p>At this time the only data passed to the external process is the client
9a58dc6a2b26ec128b1270cf48810e705f1a90dbsf socket. To receive a client socket, call recvfrom with an allocated
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe <a href="http://www.kernel.org/doc/man-pages/online/pages/man3/cmsg.3.html"><code>struct cmsghdr</code></a>. Future versions of this module may include
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe more data after the client socket, but this is not implemented at this time.
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<div id="quickview"><h3 class="directives">Directives</h3>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<p>This module provides no
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe directives.</p>
fc32fe886201ffcf1ca557bdf7d34a7468ab3374wrowe<li><code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code></li>
f086b4b402fa9a2fefc7dda85de2a3cc1cd0a654rjung<p><span>Available Languages: </span><a href="/en/mod/mod_proxy_fdpass.html" title="English"> en </a></p>
9c1260efa52c82c2a58e5b5f20cd6902563d95f5rbowen<p class="apache">Copyright 2011 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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