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21 <p class="apache">Apache HTTP Server Version 2.5</p>
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26 <div id="page-content">
27 <div id="preamble"><h1>Apache Module mod_proxy_http2</h1>
29 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_http2.html" title="English"> en </a></p>
31 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>HTTP/2 support module for
32 <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
33 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
34 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_http2_module</td></tr>
35 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_http2.c</td></tr></table>
38 <p><code class="module"><a href="../mod/mod_proxy_http2.html">mod_proxy_http2</a></code>
39 supports HTTP/2 only, it does <em>not</em>
40 provide any downgrades to HTTP/1.1. This means that the backend
41 needs to support HTTP/2 because HTTP/1.1 will not be used instead.</p>
43 <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
44 handling HTTP/2 proxy requests,
45 <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>
46 need to be both loaded by the server.</p>
48 <p><code class="module"><a href="../mod/mod_proxy_http2.html">mod_proxy_http2</a></code> works with incoming fronted requests
49 using HTTP/1.1 or HTTP/2. In both cases, requests proxied
50 to the same backend are sent over a single TCP connection
51 whenever possible (namely when the connection can be re-used).</p>
53 <p>Caveat: there will be no attemp to consolidate multiple HTTP/1.1
54 frontend requests (configured to be proxied to the same backend)
55 into HTTP/2 streams belonging to the same HTTP/2 request.
56 Each HTTP/1.1 frontend request will be proxied to the backend using
57 a separate HTTP/2 request (trying to re-use the same TCP connection
60 <p>This module relies on <a href="http://nghttp2.org/">libnghttp2</a>
61 to provide the core http/2 engine.</p>
63 <div class="warning"><h3>Warning</h3>
64 <p>This module is experimental. Its behaviors, directives, and
65 defaults are subject to more change from release to
66 release relative to other standard modules. Users are encouraged to
67 consult the "CHANGES" file for potential updates.</p>
70 <div class="warning"><h3>Warning</h3>
71 <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
72 servers are dangerous both to your network and to the Internet at
76 <div id="quickview"><h3>Topics</h3>
78 <li><img alt="" src="../images/down.gif" /> <a href="#examples">Basic Examples</a></li>
79 <li><img alt="" src="../images/down.gif" /> <a href="#notes">Request notes</a></li>
80 </ul><h3 class="directives">Directives</h3>
81 <p>This module provides no
83 <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__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_proxy_http2">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_proxy_http2">Report a bug</a></li></ul><h3>See also</h3>
85 <li><code class="module"><a href="../mod/mod_http2.html">mod_http2</a></code></li>
86 <li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
87 <li><code class="module"><a href="../mod/mod_proxy_connect.html">mod_proxy_connect</a></code></li>
88 <li><a href="#comments_section">Comments</a></li></ul></div>
89 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
91 <h2><a name="examples" id="examples">Basic Examples</a></h2>
93 <p>The examples below demonstrate how to configure HTTP/2 for
94 backend connections for a reverse proxy. </p>
96 <div class="example"><h3>HTTP/2 (TLS)</h3><pre class="prettyprint lang-config">ProxyPass "/app" "h2://app.example.com"
97 ProxyPassReverse "/app" "h2://app.example.com"</pre>
100 <div class="example"><h3>HTTP/2 (cleartext)</h3><pre class="prettyprint lang-config">ProxyPass "/app" "h2c://app.example.com"
101 ProxyPassReverse "/app" "h2c://app.example.com"</pre>
103 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
104 <div class="section">
105 <h2><a name="notes" id="notes">Request notes</a></h2>
106 <p><code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code> creates the following request notes for
107 logging using the <code>%{VARNAME}n</code> format in
108 <code class="directive"><a href="../mod/mod_log_config.html#logformat">LogFormat</a></code> or
109 <code class="directive"><a href="../mod/core.html#errorlogformat">ErrorLogFormat</a></code>:
112 <dt>proxy-source-port</dt>
113 <dd>The local port used for the connection to the backend server.</dd>
114 <dt>proxy-status</dt>
115 <dd>The HTTP/2 status received from the backend server.</dd>
119 <div class="bottomlang">
120 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_http2.html" title="English"> en </a></p>
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