1<?xml version="1.0" encoding="ISO-8859-1"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!-- 4 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 5 This file is generated from xml source: DO NOT EDIT 6 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 7 --> 8<title>mod_proxy_fdpass - Apache HTTP Server</title> 9<link href="/style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> 10<link href="/style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> 11<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" /> 12<script src="/style/scripts/prettify.min.js" type="text/javascript"> 13</script> 14 15<link href="/images/favicon.ico" rel="shortcut icon" /></head> 16<body> 17<div id="page-header"> 18<p class="menu"><a href="/mod/">Modules</a> | <a href="/mod/directives.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> 19<p class="apache">Apache HTTP Server Version 2.4</p> 20<img alt="" src="/images/feather.gif" /></div> 21<div class="up"><a href="./"><img title="<-" alt="<-" src="/images/left.gif" /></a></div> 22<div id="path"> 23<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 2.4</a> > <a href="./">Modules</a></div> 24<div id="page-content"> 25<div id="preamble"><h1>Apache Module mod_proxy_fdpass</h1> 26<div class="toplang"> 27<p><span>Available Languages: </span><a href="/en/mod/mod_proxy_fdpass.html" title="English"> en </a> | 28<a href="/fr/mod/mod_proxy_fdpass.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a></p> 29</div> 30<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>fdpass external process support module for 31<code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code></td></tr> 32<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> 33<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>proxy_fdpass_module</td></tr> 34<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_proxy_fdpass.c</td></tr> 35<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available for unix in version 2.3 and later</td></tr></table> 36<h3>Summary</h3> 37 38 <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 39 client to another process.</p> 40 41 <p><code>mod_proxy_fdpass</code> uses the ability of AF_UNIX domain 42 sockets to <a href="http://www.freebsd.org/cgi/man.cgi?query=recv">pass an 43 open file descriptor</a> to allow another process to finish handling a request. 44 </p> 45 46 <p>The module has a <code>proxy_fdpass_flusher</code> provider interface, 47 which allows another module to optionally send the response headers, or even 48 the start of the response body. The default flush provider disables keep-alive, 49 and sends the response headers, letting the external process just send a 50 response body.</p> 51 52 <p>At this time the only data passed to the external process is the client 53 socket. To receive a client socket, call recvfrom with an allocated 54 <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 55 more data after the client socket, but this is not implemented at this time. 56 </p> 57</div> 58<div id="quickview"><h3 class="directives">Directives</h3> 59<p>This module provides no 60 directives.</p> 61<h3>See also</h3> 62<ul class="seealso"> 63<li><code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code></li> 64</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div> 65 66</div> 67<div class="bottomlang"> 68<p><span>Available Languages: </span><a href="/en/mod/mod_proxy_fdpass.html" title="English"> en </a> | 69<a href="/fr/mod/mod_proxy_fdpass.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a></p> 70</div><div class="top"><a href="#page-header"><img src="/images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. 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