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--><title>mod_speling - Apache HTTP Server</title><link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /><link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /><link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link href="../images/favicon.ico" rel="shortcut icon" /></head><body><div id="page-header"><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p><p class="apache">Apache HTTP Server Version 2.0</p><img alt="" src="../images/feather.gif" /></div><div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div><div id="path"><a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Modules</a></div><div id="page-content"><div id="preamble"><h1>Apache Module mod_speling</h1><table class="module"><tr><th><a href="module-dict.html#Description">Description:
</a></th><td>Attempts to correct mistaken URLs that
users might have entered by ignoring capitalization and by
allowing up to one misspelling</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>speling_module</td></tr><tr><th><a href="module-dict.html#SourceFile">Source�File:
</a></th><td>mod_speling.c</td></tr></table><h3>Summary</h3>
<p>Requests to documents sometimes cannot be served by the core
apache server because the request was misspelled or
miscapitalized. This module addresses this problem by trying to
find a matching document, even after all other modules gave up.
It does its work by comparing each document name in the
requested directory against the requested document name
<strong>without regard to case</strong>, and allowing
<strong>up to one misspelling</strong> (character insertion /
omission / transposition or wrong character). A list is built
with all document names which were matched using this
strategy.</p>
<p>If, after scanning the directory,</p>
<ul>
<li>no matching document was found, Apache will proceed as
usual and return a "document not found" error.</li>
<li>only one document is found that "almost" matches the
request, then it is returned in the form of a redirection
response.</li>
<li>more than one document with a close match was found, then
the list of the matches is returned to the client, and the
client can select the correct candidate.</li>
</ul>
</div><div id="quickview"><h3 class="directives">Directives</h3><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#checkspelling">CheckSpelling</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="CheckSpelling" id="CheckSpelling">CheckSpelling</a> <a name="checkspelling" id="checkspelling">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
</a></th><td>Enables the spelling
module</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
</a></th><td><code>CheckSpelling on|off</code></td></tr><tr><th><a href="directive-dict.html#Default">Default:
</a></th><td><code>CheckSpelling 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>Options</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_speling</td></tr><tr><th><a href="directive-dict.html#Compatibility">Compatibility:
</a></th><td>CheckSpelling was available as a separately available
module for Apache 1.1, but was limited to miscapitalizations. As
of Apache 1.3, it is part of the Apache distribution. Prior to Apache
1.3.2, the CheckSpelling directive was only available in the
"server" and "virtual host" contexts.</td></tr></table>
<p>This directive enables or disables the spelling module. When
enabled, keep in mind that</p>
<ul>
<li>the directory scan which is necessary for the spelling
correction will have an impact on the server's performance
when many spelling corrections have to be performed at the
same time.</li>
<li>the document trees should not contain sensitive files
which could be matched inadvertently by a spelling
"correction".</li>
<li>the module is unable to correct misspelled user names (as
in <code>http://my.host/~apahce/</code>), just file names or
directory names.</li>
<li>spelling corrections apply strictly to existing files, so
a request for the <code><Location /status></code> may
get incorrectly treated as the negotiated file
"<code>/stats.html</code>".</li>
</ul>
</div></div><div id="footer"><p class="apache">Maintained by the <a href="http://httpd.apache.org/docs-project/">Apache HTTP Server Documentation Project</a></p><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div></body></html>
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