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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-07 02:04:06 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-07 02:04:06 +0000
commit5dff2d61cc1c27747ee398e04d8e02843aabb1f8 (patch)
treea67c336b406c8227bac912beb74a1ad3cdc55100 /docs/manual/mod/mod_proxy_http2.html.en
parentInitial commit. (diff)
downloadapache2-5dff2d61cc1c27747ee398e04d8e02843aabb1f8.tar.xz
apache2-5dff2d61cc1c27747ee398e04d8e02843aabb1f8.zip
Adding upstream version 2.4.38.upstream/2.4.38upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
+<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" />
+<!--
+ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+ This file is generated from xml source: DO NOT EDIT
+ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+ -->
+<title>mod_proxy_http2 - Apache HTTP Server Version 2.4</title>
+<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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+<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="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_proxy_http2</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_http2.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_proxy_http2.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>HTTP/2 support module for
+<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_http2_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_http2.c</td></tr>
+<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in httpd 2.4.19 and later</td></tr></table>
+<h3>Summary</h3>
+
+ <p><code class="module"><a href="../mod/mod_proxy_http2.html">mod_proxy_http2</a></code>
+ supports HTTP/2 only, it does <em>not</em>
+ provide any downgrades to HTTP/1.1. This means that the backend
+ needs to support HTTP/2 because HTTP/1.1 will not be used instead.</p>
+
+ <p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, so in order to get the ability of
+ handling HTTP/2 proxy requests,
+ <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_http2.html">mod_proxy_http2</a></code>
+ need to be both loaded by the server.</p>
+
+ <p><code class="module"><a href="../mod/mod_proxy_http2.html">mod_proxy_http2</a></code> works with incoming fronted requests
+ using HTTP/1.1 or HTTP/2. In both cases, requests proxied
+ to the same backend are sent over a single TCP connection
+ whenever possible (namely when the connection can be re-used).</p>
+
+ <p>Caveat: there will be no attempt to consolidate multiple HTTP/1.1
+ frontend requests (configured to be proxied to the same backend)
+ into HTTP/2 streams belonging to the same HTTP/2 request.
+ Each HTTP/1.1 frontend request will be proxied to the backend using
+ a separate HTTP/2 request (trying to re-use the same TCP connection
+ if possible).</p>
+
+ <p>This module relies on <a href="http://nghttp2.org/">libnghttp2</a>
+ to provide the core http/2 engine.</p>
+
+ <div class="warning"><h3>Warning</h3>
+ <p>This module is experimental. Its behaviors, directives, and
+ defaults are subject to more change from release to
+ release relative to other standard modules. Users are encouraged to
+ consult the "CHANGES" file for potential updates.</p>
+ </div>
+
+ <div class="warning"><h3>Warning</h3>
+ <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
+ servers are dangerous both to your network and to the Internet at
+ large.</p>
+ </div>
+</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>Topics</h3>
+<ul id="topics">
+<li><img alt="" src="../images/down.gif" /> <a href="#examples">Basic Examples</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#notes">Request notes</a></li>
+</ul><h3 class="directives">Directives</h3>
+<p>This module provides no
+ directives.</p>
+<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_proxy_http2">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_proxy_http2">Report a bug</a></li></ul><h3>See also</h3>
+<ul class="seealso">
+<li><code class="module"><a href="../mod/mod_http2.html">mod_http2</a></code></li>
+<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
+<li><code class="module"><a href="../mod/mod_proxy_connect.html">mod_proxy_connect</a></code></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="examples" id="examples">Basic Examples</a></h2>
+
+ <p>The examples below demonstrate how to configure HTTP/2 for
+ backend connections for a reverse proxy. </p>
+
+ <div class="example"><h3>HTTP/2 (TLS)</h3><pre class="prettyprint lang-config">ProxyPass "/app" "h2://app.example.com"
+ProxyPassReverse "/app" "https://app.example.com"</pre>
+</div>
+
+ <div class="example"><h3>HTTP/2 (cleartext)</h3><pre class="prettyprint lang-config">ProxyPass "/app" "h2c://app.example.com"
+ProxyPassReverse "/app" "http://app.example.com"</pre>
+</div>
+
+ <div class="note">
+ <p>The schemes to configure above in
+ <code class="directive">ProxyPassReverse</code> for reverse proxying
+ <code>h2</code> (or <code>h2c</code>) protocols are the usual
+ <code>https</code> (resp. <code>http</code>) as expected/used by
+ the user agent.</p>
+ </div>
+ </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="notes" id="notes">Request notes</a></h2>
+ <p><code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code> creates the following request notes for
+ logging using the <code>%{VARNAME}n</code> format in
+ <code class="directive"><a href="../mod/mod_log_config.html#logformat">LogFormat</a></code> or
+ <code class="directive"><a href="../mod/core.html#errorlogformat">ErrorLogFormat</a></code>:
+ </p>
+ <dl>
+ <dt>proxy-source-port</dt>
+ <dd>The local port used for the connection to the backend server.</dd>
+ <dt>proxy-status</dt>
+ <dd>The HTTP/2 status received from the backend server.</dd>
+ </dl>
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_http2.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_proxy_http2.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 again 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 Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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