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<title>mod_cern_meta - Apache HTTP Server Version 2.4</title>
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<div id="preamble"><h1>Apache Module mod_cern_meta</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_cern_meta.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_cern_meta.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>CERN httpd metafile semantics</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>cern_meta_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_cern_meta.c</td></tr></table>
<h3>Summary</h3>
<p>Emulate the CERN HTTPD Meta file semantics. Meta files are HTTP
headers that can be output in addition to the normal range of
headers for each file accessed. They appear rather like the
Apache .asis files, and are able to provide a crude way of
influencing the Expires: header, as well as providing other
curiosities. There are many ways to manage meta information,
this one was chosen because there is already a large number of
CERN users who can exploit this module.</p>
<p>More information on the <a href="http://www.w3.org/pub/WWW/Daemon/User/Config/General.html#MetaDir">CERN metafile semantics</a> is available.</p>
</div>
<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#metadir">MetaDir</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#metafiles">MetaFiles</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#metasuffix">MetaSuffix</a></li>
</ul>
<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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_cern_meta">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_cern_meta">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><code class="module"><a href="../mod/mod_headers.html">mod_headers</a></code></li>
<li><code class="module"><a href="../mod/mod_asis.html">mod_asis</a></code></li>
<li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="MetaDir" id="MetaDir">MetaDir</a> <a name="metadir" id="metadir">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Name of the directory to find CERN-style meta information
files</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MetaDir <var>directory</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MetaDir .web</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cern_meta</td></tr>
</table>
<p>Specifies the name of the directory in which Apache can find
meta information files. The directory is usually a 'hidden'
subdirectory of the directory that contains the file being
accessed. Set to "<code>.</code>" to look in the same directory
as the file:</p>
<pre class="prettyprint lang-config">MetaDir .</pre>
<p>Or, to set it to a subdirectory of the directory containing the
files:</p>
<pre class="prettyprint lang-config">MetaDir .meta</pre>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="MetaFiles" id="MetaFiles">MetaFiles</a> <a name="metafiles" id="metafiles">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Activates CERN meta-file processing</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MetaFiles on|off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MetaFiles off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cern_meta</td></tr>
</table>
<p>Turns on/off Meta file processing on a per-directory basis.</p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="MetaSuffix" id="MetaSuffix">MetaSuffix</a> <a name="metasuffix" id="metasuffix">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>File name suffix for the file containing CERN-style
meta information</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MetaSuffix <var>suffix</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MetaSuffix .meta</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cern_meta</td></tr>
</table>
<p>Specifies the file name suffix for the file containing the
meta information. For example, the default values for the two
directives will cause a request to
<code>DOCUMENT_ROOT/somedir/index.html</code> to look in
<code>DOCUMENT_ROOT/somedir/.web/index.html.meta</code> and
will use its contents to generate additional MIME header
information.</p>
<div class="example"><h3>Example:</h3><pre class="prettyprint lang-config">MetaSuffix .meta</pre>
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