This module attempts to correct misspellings of URLs that users
might have entered, by ignoring capitalization and by allowing up to
Source File: mod_speling.c
Module Identifier: speling_module
Compatibility: Available in Apache 1.3 and later. Available as an External module in Apache 1.1 and later.
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 without regard to case, and allowing
up to one misspelling (character insertion / omission
/ transposition or wrong character). A list is built with all document
names which were matched using this strategy.
If, after scanning the directory,
- no matching document was found, Apache will proceed as usual
and return a "document not found" error.
- only one document is found that "almost" matches the request,
then it is returned in the form of a redirection response.
- 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.
Syntax: CheckSpelling on|off
Context: server config, virtual host,
Compatibility: CheckSpelling was available as a
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.
This directive enables or disables the spelling module. When enabled,
keep in mind that
- 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.
- the document trees should not contain sensitive files which could
be matched inadvertently by a spelling "correction".
- the module is unable to correct misspelled user names
http://my.host/~apahce/), just file names or
- spelling corrections apply strictly to existing files, so a request for
the <Location /status> may get incorrectly treated
as the negotiated file "/stats.html".