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<title>Version history and change log for mod_gzip</title>
<meta name="author" content="Michael Schröpl" />
<meta name="description" content="An overview about all changes within the corresponding mod_gzip versions" />
<meta name="keywords" content="Apache, compression, gzip, mod_gzip, versions" />
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<img src="mod_gzip_logo.gif" height="47" width="102" alt="mod_gzip logo" />
<a title="mod_gzip - what's that, anyway?" href="index.htm">mod_gzip</a>
<a title="Compression of HTTP content using Content-Encoding" href="encoding.htm">Content-Encoding</a>
<a title="Which browsers can handle 'Content-Encoding: gzip'?" href="browser.htm">Browsers</a>
<a title="How do Firewalls handle 'Content-Encoding:'?" href="firewalls.htm">Firewalls</a>
<a title="An example configuration for mod_gzip" href="config.htm">Configuration</a>
<a title="Complete description of mod_gzip status codes" href="status.htm">Status Codes</a>
<a title="Possible enhancements in future versions of mod_gzip" href="enhancements.htm">Enhancements</a>
<a title="Caching of negotiated HTTP responses" href="cache.htm">Caching</a>
<p>Versions</p>
<a title="Other ressources about mod_gzip" href="links.htm">Links</a>
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<div id="content">
<h1>Version history and change log for mod_gzip</h1>
<div class="new13261a"><h2><a id="v1.3.26.1a"></a>New in version 1.3.26.1a</h2>
<ul>
<li><span class="bugfix">bug fix</span>: In previous versions <tt>mod_gzip</tt> had a problem handling <strong>POST requests containing a body longer than 4 rsp. 8 kByte</strong>.<br />
Now <tt>mod_gzip</tt> declines to handle these requests, so that their content will be served in uncompressed form.</li>
<li><span class="bugfix">bug fix</span>: In previous versions <tt>mod_gzip</tt> had a problem handling <strong>HTTP headers longer than 4 kB</strong> <small>(e. g. when using very long contents for HTTP cookies)</small>. This has been fixed.</li>
<li><a href="cache.htm#vary-1.3.26.1a">Reduction</a> of the amount of <a href="cache.htm#vary-1.3.19.2a"><code>Vary:</code> HTTP headers</a> being generated since <a href="#v1.3.19.2a">version 1.3.19.2a</a>, re-improving the cacheability of uncompressed content by proxy caches.</li>
<li>Additionally sending a <a href="cache.htm#vary-wildcard"><code>Vary: *</code> HTTP header</a> when a <code>mod_gzip_min_http</code> directive has been used, to indicate a type of negotiation other than for HTTP header names</li>
<li>New directive: <a href="config.htm#precompressed"><code>mod_gzip_update_static</code></a>.</li>
<li>The ancient directives
<ul>
<li><code>mod_gzip_add_vinfo</code>,</li>
<li><code>mod_gzip_do_static_files</code>,</li>
<li><code>mod_gzip_do_cgi</code>,</li>
<li><code>mod_gzip_post_on</code> and</li>
<li><code>mod_gzip_verbose_debug</code></li>
</ul>
from earlier <tt>mod_gzip</tt> releases that weren't supported for some time now have now been completely removed from the program source.<br />
This may cause configurations still containing these ineffective directives to no longer load now with the new version; simply remove these old directives, as they didn't have any effect at all even in version 1.3.19.1a.</li>
<li>Patch for the Netware platform: Adaption of some message texts whose wording covered only Win32 <small>(supplied by Günther Knauf)</small>.</li>
</ul></div>
<div class="new13192a"><h2><a id="v1.3.19.2a"></a>New in version 1.3.19.2a</h2>
<ul>
<li>Sending the <a href="cache.htm#vary-1.3.19.2a"><code>Vary:</code> HTTP header</a> to mark the output as negotiation result for proxy servers.</li>
<li>Splitting the source code into three files:
<ul>
<li><code>mod_gzip.c</code>: module functions and embedding into the Apache server</li>
<li><code>mod_gzip_compress.c</code>: the gzip compression function by Kevin Kiley</li>
<li><code>mod_gzip_debug.c</code>: pure diagnostic output functions <small>(required only if the variable <code>MOD_GZIP_DEBUG1</code> has been defined in the preprocessor)</small>.</li>
</ul>
</li>
<li><span class="bugfix">bug fix</span>: If the result of a compression is <em>larger</em> than the original file then <tt>mod_gzip</tt> <strong>forgot to remove the created temporary file from its work directory</strong>. During time a lot of files gathered there <small>(which by the way were a sign that the <tt>mod_gzip</tt> configuration wasn't selected perfectly, because <tt>mod_gzip</tt> could have saved the effort to compress all these files)</small>.</li>
<li>New directive: <a href="config.htm#filters"><code>mod_gzip_handle_methods</code></a>.</li>
<li>New directive: <a href="config.htm#responsibilities"><code>mod_gzip_static_suffix</code></a></li>
<li>When looking for a statically precompressed version of a file <tt>mod_gzip</tt> now will automatically <a href="status.htm#SEND_AS_IS:PRECOMPRESSED_VARIANT_OUTDATED">detect</a> whether this version is older than the uncompressed original file.</li>
<li>When looking for a statically precompressed version of a file <tt>mod_gzip</tt> now will automatically detect an access to a directory - the previous version would have served the content of a file with the name of the directory plus the extension <code>.gz</code>, which at least seems to be a questionable idea.<br />
Now <tt>mod_gzip</tt> will no longer look for a statically precompressed file in case of an access to a directory but <em>always</em> try to dynamically compress the content <small>(if it is entitled to do so)</small>.</li>
</ul></div>
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<p id="mail">(<a href="mailto:michael.schroepl@gmx.de?subject=mod_gzip">Michael Schröpl</a>, 2002-09-30)</p>
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