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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<TITLE>Upgrading to 2.0 from 1.3</TITLE>
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<H1 ALIGN="CENTER">Upgrading to 2.0 from 1.3</H1>
<P>In order to assist folks upgrading, we maintain a document
describing information critical to existing Apache users. These are
intended to be brief notes, and you should be able to find more
information in either the <A HREF="new_features_2_0.html">New
Features</A> document, or in the <CODE>src/CHANGES</CODE> file.
<H3>Compile-Time Configuration Changes</H3>
<UL>
<LI>Apache now uses an <code>autoconf</code> and <code>libtool</code>
system for configuring the build processes. Using this system
is similar to, but not the same as, using the APACI system in
Apache 1.3. Further documentation to follow.</li>
<li>In addition to the usual selection of modules which you can choose
to compile, Apache 2.0 has moved the main part of request processing
into <a href="mpm.html">Multi-Processing Modules</a> (MPMs).</li>
</UL>
<H3>Run-Time Configuration Changes</H3>
<UL>
<li>The <code>CacheNegotiatedDocs</code> directive now takes
the argument <code>on</code> or <code>off</code>. Existing
instances of <code>CacheNegotiatedDocs</code> should be replaced
with <code>CachNegotiatedDocs on</code>.</li>
<li>The <code>ErrorDocument</code> directive no longer uses a quote at
the beginning of the argument to indicate a text message. Instead,
you should enclose the message in double quotes. For example,
existing instances of <blockquote><code>ErrorDocument 403 "Some
Message</code></blockquote> should be replaced with
<blockquote><code>ErrorDocument 403 "Some
Message"</code></blockquote> As long as the second argument is not a
valid URL or pathname, it will be treated as a text message.</li>
<li>The <code>AccessConfig</code> and <code>ResourceConfig</code>
directives no longer exist. Existing instances of these directives
can be replaced with the <a
href="mod/core.html#include"><code>Include</code></a> directive which
has equivalent functionality. If you were making use of the default
values of these directives without including them in the configuration
files, you may need to add <code>Include conf/access.conf</code> and
<code>Include conf/srm.conf</code> to your httpd.conf. In order to
assure that Apache reads the configuration files in the same order as
was implied by the older directives, the <code>Include</code>
directives should be placed at the end of httpd.conf, with the one for
<code>srm.conf</code> preceding the one of
<code>access.conf</code>.</li>
<li>The <code>BindAddress</code> directive no longer exists.
Equivalent functionality is provided with the more flexible <code><a
href="mod/mpm_common.html">Listen</a></code> directive.
<li>The <code>ExtendedStatus</code> directive no longer exists.
Status reporting has been completely rewritten to take advantage
of the new MPM system.</li>
<li>The <code>ServerType</code> directive no longer exists.
The method used to serve requests is now determined by the selection
of MPM. There is currently no MPM designed to be launched by
inetd.</li>
<li>Many directives that were in the core server in Apache 1.3
are now in the MPMs.</li>
</UL>
<H3>Misc Changes</H3>
<UL>
<li>Graceful restarts of the server are now executed by signaling the
parent process with <code>SIGWINCH</code> rather than
<code>USR1</code>.</li>
<li>The <code>httpd</code> command line option <code>-S</code>
which was used for printing the virtual host configuration has
been replaced by <code>-t -D DUMP_VHOSTS</code>.</li>
<li>The <code>httpd</code> command line option <code>-X</code> has
been removed. Most MPMs allow the same functionality to be requested
by setting the <code>ONE_PROCESS</code> and <code>NO_DETACH</code>
environment variables prior to launching <code>httpd</code>.</li>
<li>The module mod_auth_digest, which was experimental in Apache 1.3
is now a standard module.</li>
<li>The mod_mmap_static module, which was experimental in Apache 1.3
has been replaced with mod_file_cache.</li>
</UL>
<H3>Third Party Modules</H3>
<p>Extensive changes were made to the server API in Apache 2.0.
Existing modules designed for the Apache 1.3 API will <strong>not</strong>
work in Apache 2.0 without modification. Details to follow.
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