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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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+ -->
+<title>Using mod_rewrite for Proxying - Apache HTTP Server Version 2.4</title>
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+<body id="manual-page"><div id="page-header">
+<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>
+<p class="apache">Apache HTTP Server Version 2.4</p>
+<img alt="" src="../images/feather.png" /></div>
+<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
+<div id="path">
+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Rewrite</a></div><div id="page-content"><div id="preamble"><h1>Using mod_rewrite for Proxying</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/rewrite/proxy.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/rewrite/proxy.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
+</div>
+
+
+<p>This document supplements the <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>
+<a href="../mod/mod_rewrite.html">reference documentation</a>. It describes
+how to use the RewriteRule's [P] flag to proxy content to another server.
+A number of recipes are provided that describe common scenarios.</p>
+
+</div>
+<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>See also</h3><ul class="seealso"><li><a href="../mod/mod_rewrite.html">Module documentation</a></li><li><a href="intro.html">mod_rewrite introduction</a></li><li><a href="remapping.html">Redirection and remapping</a></li><li><a href="access.html">Controlling access</a></li><li><a href="vhosts.html">Virtual hosts</a></li><li><a href="rewritemap.html">Using RewriteMap</a></li><li><a href="advanced.html">Advanced techniques</a></li><li><a href="avoid.html">When not to use mod_rewrite</a></li><li><a href="#comments_section">Comments</a></li></ul></div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="dynamic-proxy" id="dynamic-proxy">Proxying Content with mod_rewrite</a></h2>
+
+
+
+ <dl>
+ <dt>Description:</dt>
+
+ <dd>
+ <p>
+ mod_rewrite provides the [P] flag, which allows URLs to be passed,
+ via mod_proxy, to another server. Two examples are given here. In
+ one example, a URL is passed directly to another server, and served
+ as though it were a local URL. In the other example, we proxy
+ missing content to a back-end server.</p>
+ </dd>
+
+ <dt>Solution:</dt>
+
+ <dd>
+ <p>To simply map a URL to another server, we use the [P] flag, as
+ follows:</p>
+
+<pre class="prettyprint lang-config">RewriteEngine on
+RewriteBase "/products/"
+RewriteRule "^widget/(.*)$" "http://product.example.com/widget/$1" [P]
+ProxyPassReverse "/products/widget/" "http://product.example.com/widget/"</pre>
+
+
+ <p>In the second example, we proxy the request only if we can't find
+ the resource locally. This can be very useful when you're migrating
+ from one server to another, and you're not sure if all the content
+ has been migrated yet.</p>
+
+<pre class="prettyprint lang-config">RewriteCond "%{REQUEST_FILENAME}" !-f
+RewriteCond "%{REQUEST_FILENAME}" !-d
+RewriteRule "^/(.*)" "http://old.example.com/$1" [P]
+ProxyPassReverse "/" "http://old.example.com/"</pre>
+
+ </dd>
+
+ <dt>Discussion:</dt>
+
+ <dd><p>In each case, we add a <code class="directive"><a href="../mod/mod_proxy.html#proxypassreverse">ProxyPassReverse</a></code> directive to ensure
+ that any redirects issued by the backend are correctly passed on to
+ the client.</p>
+
+ <p>Consider using either <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> whenever possible in
+ preference to mod_rewrite.</p>
+ </dd>
+ </dl>
+
+</div></div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/rewrite/proxy.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/rewrite/proxy.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
+</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&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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