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<?xml version="1.0"?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
<!-- $LastChangedRevision$ -->
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<modulesynopsis metafile="mod_proxy_http2.xml.meta">
<name>mod_proxy_http2</name>
<description>HTTP/2 support module for
<module>mod_proxy</module></description>
<status>Extension</status>
<sourcefile>mod_proxy_http2.c</sourcefile>
<identifier>proxy_http2_module</identifier>
<summary>
<p>This module <em>requires</em> the service of <module
>mod_proxy</module>. It provides the features used for
proxying HTTP/2 requests. <module>mod_proxy_http2</module>
supports HTTP/2 only. It does <em>not</em>
provide any downgrades to HTTP/1.1.</p>
<p>Thus, in order to get the ability of handling HTTP/2 proxy requests,
<module>mod_proxy</module> and <module>mod_proxy_http2</module>
have to be present in the server.</p>
<p><module>mod_proxy_http2</module> works with incoming requests
over HTTP/1.1 and HTTP/2 requests. If <module>mod_http2</module>
handles the frontend connection, requests against the same HTTP/2
backend are sent over a single connection, whenever possible.</p>
<p>This module relies on <a href="http://nghttp2.org/">libnghttp2</a>
to provide the core http/2 engine.</p>
<note type="warning"><title>Warning</title>
<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>
</note>
<note type="warning"><title>Warning</title>
<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>
</note>
</summary>
<seealso><module>mod_http2</module></seealso>
<seealso><module>mod_proxy</module></seealso>
<seealso><module>mod_proxy_connect</module></seealso>
<section id="examples"><title>Basic Examples</title>
<p>The examples below demonstrate how to configure HTTP/2 for
backend connections for a reverse proxy. </p>
<example><title>HTTP/2 (TLS)</title>
<highlight language="config">
ProxyPass "/app" "h2://app.example.com"
ProxyPassReverse "/app" "h2://app.example.com"
</highlight>
</example>
<example><title>HTTP/2 (cleartext)</title>
<highlight language="config">
ProxyPass "/app" "h2c://app.example.com"
ProxyPassReverse "/app" "h2c://app.example.com"
</highlight>
</example>
</section> <!-- /examples -->
<section id="notes"><title>Request notes</title>
<p><module>mod_proxy_http</module> creates the following request notes for
logging using the <code>%{VARNAME}n</code> format in
<directive module="mod_log_config">LogFormat</directive> or
<directive module="core">ErrorLogFormat</directive>:
</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>
</section>
</modulesynopsis>
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