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a78048ccbdb6256da15e6b0e7e95355e480c2301nd<div id="preamble"><h1>Apache Module mod_proxy_fdpass</h1>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<p><span>Available Languages: </span><a href="/en/mod/mod_proxy_fdpass.html" title="English"> en </a></p>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>fdpass external process support module for
f086b4b402fa9a2fefc7dda85de2a3cc1cd0a654rjung<code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code></td></tr>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4b575a6b6704b516f22d65a3ad35696d7b9ba372rpluem<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>proxy_fdpass_module</td></tr>
4b575a6b6704b516f22d65a3ad35696d7b9ba372rpluem<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_proxy_fdpass.c</td></tr>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available for unix in version 2.3 and later</td></tr></table>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd <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
a78048ccbdb6256da15e6b0e7e95355e480c2301nd client to another process.</p>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd <p><code>mod_proxy_fdpass</code> uses the ability of AF_UNIX domain
a78048ccbdb6256da15e6b0e7e95355e480c2301nd sockets to <a href="http://www.freebsd.org/cgi/man.cgi?query=recv">pass an
a78048ccbdb6256da15e6b0e7e95355e480c2301nd open file descriptor</a> to allow another process to finish handling a request.
a78048ccbdb6256da15e6b0e7e95355e480c2301nd <p>The module has a <code>proxy_fdpass_flusher</code> provider interface,
a78048ccbdb6256da15e6b0e7e95355e480c2301nd which allows another module to optionally send the response headers, or even
a78048ccbdb6256da15e6b0e7e95355e480c2301nd the start of the response body. The default flush provider disables keep-alive,
a78048ccbdb6256da15e6b0e7e95355e480c2301nd and sends the response headers, letting the external process just send a
a78048ccbdb6256da15e6b0e7e95355e480c2301nd response body.</p>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd <p>At this time the only data passed to the external process is the client
a78048ccbdb6256da15e6b0e7e95355e480c2301nd socket. To receive a client socket, call recvfrom with an allocated
a78048ccbdb6256da15e6b0e7e95355e480c2301nd <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
a78048ccbdb6256da15e6b0e7e95355e480c2301nd more data after the client socket, but this is not implemented at this time.
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<div id="quickview"><h3 class="directives">Directives</h3>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<p>This module provides no
a78048ccbdb6256da15e6b0e7e95355e480c2301nd directives.</p>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<li><code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code></li>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
a78048ccbdb6256da15e6b0e7e95355e480c2301nd<p><span>Available Languages: </span><a href="/en/mod/mod_proxy_fdpass.html" title="English"> en </a></p>
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a78048ccbdb6256da15e6b0e7e95355e480c2301nd<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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