DO NOT REPLY [Bug 25201] New: - Provide Cache Purge operation

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=25201

Provide Cache Purge operation

           Summary: Provide Cache Purge operation
           Product: Apache httpd-2.0
           Version: 2.0.48
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: mod_cache
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: fmeschbe@day.com


We place Apache httpd 2.0 in front of our CMS product as a caching reverse proxy
to enhance performance. While the cache properly works managing its cached
resources there is currently no functionality for the CMS product to inform the
proxy about changed content.

I propose to enhance the mod_cache module to support a new configuration
directive "CachePurgeMethod" with default "PURGE". When a request for such a
method comes in the mod_cache handles it by trying to remove the indicated cache
entry.

If the cache entry exists, the .data and .header file is removed and the request
is terminated with a OK/200 status. If no cache entry exists for the request
URL, the request is terminated with a NOT_FOUND/404 status.

This behaviour (method to purge a cache entry and the status codes for
(un)successfully removal) is sketched after the PURGE method support of the
squid cache. See http://www.squid-cache.org/Doc/FAQ/FAQ-7.html#ss7.5 for short
information.

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