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From "Nicolas Richeton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCLIENT-1384) Expose CacheInvalidator in CachingHttpClientBuilder
Date Tue, 30 Jul 2013 14:27:49 GMT
Nicolas Richeton created HTTPCLIENT-1384:
--------------------------------------------

             Summary: Expose CacheInvalidator in CachingHttpClientBuilder
                 Key: HTTPCLIENT-1384
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1384
             Project: HttpComponents HttpClient
          Issue Type: Wish
          Components: HttpCache
    Affects Versions: 4.3 Beta2, 4.2.5
            Reporter: Nicolas Richeton


There is currently no way to customize the CacheInvalidator. Could it be possible to allow
setting a  CacheInvalidator in CachingHttpClientBuilder (eg. CachingHttpClientBuilder#setCacheInvalidator())

Our use case : 
- HttpClientCache is used in a Caching Reverse Proxy (shared cache, exposed to public connections)
- We have to ensure the cache cannot be flush by a random user.  
- The default CacheInvalidator flushes all variants of an URI when receiving anything other
than GET, HEAD (compliant with RFC)
- It is currently possible for a user to flush the whole cache by sending POST requests of
all uri (this may be harmful even only on a home page). 

While it is not RFC-compliant, we need at least the ability to prevent invalidation in CacheInvalidator#flushInvalidatedCacheEntriesFor
and/or control invalidation with custom method  (PURGE) and other criteria (like remote ip)

The same applies to HttpClientCache 4.2.5: CachingHttpClient which does not allow provide
a custom CacheInvalidator

Would this sound ok for you ? 


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