github.com/krum110487/go-htaccess@v0.0.0-20240316004156-60641c8e7598/tests/data/apache_2_2_34/manual/mod/mod_proxy_http.html.en (about) 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 <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" /> 5 <!-- 6 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 7 This file is generated from xml source: DO NOT EDIT 8 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 9 --> 10 <title>mod_proxy_http - Apache HTTP Server Version 2.2</title> 11 <link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> 12 <link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> 13 <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" /> 14 <script src="../style/scripts/prettify.min.js" type="text/javascript"> 15 </script> 16 17 <link href="../images/favicon.ico" rel="shortcut icon" /><link href="http://httpd.apache.org/docs/current/mod/mod_proxy_http.html" rel="canonical" /></head> 18 <body> 19 <div id="page-header"> 20 <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> 21 <p class="apache">Apache HTTP Server Version 2.2</p> 22 <img alt="" src="../images/feather.gif" /></div> 23 <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> 24 <div id="path"> 25 <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 2.2</a> > <a href="./">Modules</a></div> 26 <div id="page-content"> 27 <div class="retired"><h4>Please note</h4> 28 <p> This document refers to a legacy release (<strong>2.2</strong>) of Apache httpd. The active release (<strong>2.4</strong>) is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p> 29 <p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_proxy_http.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache Module mod_proxy_http</h1> 30 <div class="toplang"> 31 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_http.html" title="English"> en </a> | 32 <a href="../fr/mod/mod_proxy_http.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | 33 <a href="../ja/mod/mod_proxy_http.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p> 34 </div> 35 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>HTTP support module for 36 <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr> 37 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> 38 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_http_module</td></tr> 39 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_http.c</td></tr></table> 40 <h3>Summary</h3> 41 42 <p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. It provides the features used for 43 proxying HTTP and HTTPS requests. <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code> 44 supports HTTP/0.9, HTTP/1.0 and HTTP/1.1. It does <em>not</em> 45 provide any caching abilities. If you want to set up a caching 46 proxy, you might want to use the additional service of the 47 <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> module.</p> 48 49 <p>Thus, in order to get the ability of handling HTTP proxy requests, 50 <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code> 51 have to be present in the server.</p> 52 53 <div class="warning"><h3>Warning</h3> 54 <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy 55 servers are dangerous both to your network and to the Internet at 56 large.</p> 57 </div> 58 </div> 59 <div id="quickview"><h3>Topics</h3> 60 <ul id="topics"> 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 64 directives.</p> 65 <h3>See also</h3> 66 <ul class="seealso"> 67 <li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li> 68 <li><code class="module"><a href="../mod/mod_proxy_connect.html">mod_proxy_connect</a></code></li> 69 </ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div> 70 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> 71 <div class="section"> 72 <h2><a name="env" id="env">Environment Variables</a></h2> 73 <p>In addition to the configuration directives that control the 74 behaviour of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, there are a number of 75 <dfn>environment variables</dfn> that control the HTTP protocol 76 provider. Environment variables below that don't specify specific values 77 are enabled when set to any value.</p> 78 <dl> 79 <dt>proxy-sendextracrlf</dt> 80 <dd>Causes proxy to send an extra CR-LF newline on the end of a 81 request. This is a workaround for a bug in some browsers.</dd> 82 <dt>force-proxy-request-1.0</dt> 83 <dd>Forces the proxy to send requests to the backend as HTTP/1.0 84 and disables HTTP/1.1 features.</dd> 85 <dt>proxy-nokeepalive</dt> 86 <dd>Forces the proxy to close the backend connection after 87 each request.</dd> 88 <dt>proxy-chain-auth</dt> 89 <dd>If the proxy requires authentication, it will read and 90 consume the proxy authentication credentials sent by the client. 91 With <var>proxy-chain-auth</var> it will <em>also</em> forward 92 the credentials to the next proxy in the chain. This may 93 be necessary if you have a chain of proxies that share 94 authentication information. <strong>Security Warning:</strong> 95 Do not set this unless you know you need it, as it forwards 96 sensitive information!</dd> 97 <dt>proxy-sendcl</dt> 98 <dd>HTTP/1.0 required all HTTP requests that include a body 99 (e.g. POST requests) to include a <var>Content-Length</var> 100 header. This environment variable forces the Apache proxy to 101 send this header to the backend server, regardless of what the 102 Client sent to the proxy. It ensures compatibility when 103 proxying for an HTTP/1.0 or unknown backend. However, it 104 may require the entire request to be buffered by the proxy, 105 so it becomes very inefficient for large requests.</dd> 106 <dt>proxy-sendchunks or proxy-sendchunked</dt> 107 <dd>This is the opposite of <var>proxy-sendcl</var>. It allows 108 request bodies to be sent to the backend using chunked transfer 109 encoding. This allows the request to be efficiently streamed, 110 but requires that the backend server supports HTTP/1.1.</dd> 111 <dt>proxy-interim-response</dt> 112 <dd>This variable takes values <code>RFC</code> or 113 <code>Suppress</code>. Earlier httpd versions would suppress 114 HTTP interim (1xx) responses sent from the backend. This is 115 technically a violation of the HTTP protocol. In practice, 116 if a backend sends an interim response, it may itself be 117 extending the protocol in a manner we know nothing about, 118 or just broken. So this is now configurable: set 119 <code>proxy-interim-response RFC</code> to be fully protocol 120 compliant, or <code>proxy-interim-response Suppress</code> 121 to suppress interim responses.</dd> 122 <dt>proxy-initial-not-pooled</dt> 123 <dd>If this variable is set no pooled connection will be reused 124 if the client connection is an initial connection. This avoids 125 the "proxy: error reading status line from remote server" error message 126 caused by the race condition that the backend server closed the 127 pooled connection after the connection check by the proxy and 128 before data sent by the proxy reached the backend. It has to be 129 kept in mind that setting this variable downgrades performance, 130 especially with HTTP/1.0 clients. 131 </dd> 132 </dl> 133 </div> 134 </div> 135 <div class="bottomlang"> 136 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_http.html" title="English"> en </a> | 137 <a href="../fr/mod/mod_proxy_http.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | 138 <a href="../ja/mod/mod_proxy_http.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p> 139 </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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