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<title>API Changes in Apache HTTP Server 2.6 since 2.4 - Apache HTTP Server Version 2.5</title>
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.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 2.5</p>
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<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 2.5</a></div><div id="page-content"><div id="preamble"><h1>API Changes in Apache HTTP Server 2.6 since 2.4</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/developer/new_api_2_6.html" title="English"> en </a></p>
</div>
<p>This document describes changes to the Apache HTTPD API from
version 2.4 to 2.6, that may be of interest to module/application
developers and core hacks. As of the first GA release of the
2.6 branch API compatibility is preserved for the life of the
2.6 branch. (The
<a href="http://svn.apache.org/repos/asf/httpd/httpd/branches/2.6.x/VERSIONING">VERSIONING</a>
description for the 2.6 release provides more information about API
compatibility.)</p>
<p>API changes fall into two categories: APIs that are altogether new,
and existing APIs that are expanded or changed. The latter are
further divided into those where all changes are backwards-compatible
(so existing modules can ignore them), and those that might
require attention by maintainers. As with the transition from
HTTPD 2.2 to 2.4, existing modules and applications will require
recompiling and may call for some attention, but most should not
require any substantial updating (although some may be able to
take advantage of API changes to offer significant improvements).</p>
<p>For the purpose of this document, the API is split according
to the public header files. These headers are themselves the
reference documentation, and can be used to generate a browsable
HTML reference with <code>make docs</code>.</p>
</div>
<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#api_changes">Changed APIs</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#upgrading">Specific information on upgrading modules from 2.4</a></li>
</ul><h3>See also</h3><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="section">
<h2><a name="api_changes" id="api_changes">Changed APIs</a> <a title="Permanent link" href="#api_changes" class="permalink">¶</a></h2>
<h3><a name="ap_fill_me_in" id="ap_fill_me_in">ap_fill_me_in (NEW!)</a></h3>
<p>Introduces a new API to fill me in.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="upgrading" id="upgrading">Specific information on upgrading modules from 2.4</a> <a title="Permanent link" href="#upgrading" class="permalink">¶</a></h2>
<h3><a name="upgrading_fillmein" id="upgrading_fillmein">Fill me in</a></h3>
<p>In order to take advantage of fill me in.</p>
<h3><a name="upgrading_byfunction" id="upgrading_byfunction">If your module uses these existing APIs...</a></h3>
<dl>
<dt><code>ap_md5digest()</code> / <code>ap_md5contextTo64</code></dt>
<dd>These functions are no longer available. Use the equivalent functions
from APR if needed.</dd>
</dl>
<h3><a name="upgrading_byfeature" id="upgrading_byfeature">If your module interfaces with this feature...</a></h3>
<dl>
<dt>fillmin</dt>
<dd>Optional: If your module fills me in.</dd>
</dl>
<h3><a name="upgrading_newfeatures" id="upgrading_newfeatures">Does your module...</a></h3>
<dl>
<dt>Fill me in</dt>
<dd>Consider if filling me in.</dd>
</dl>
</div></div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/developer/new_api_2_6.html" title="English"> en </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&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 Freenode, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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