[Zope-dev] [Caching] Inefficient HTML cache?

We use Apache for caching and observe the following behaviour: Apache requests the object from Zope and caches it until the expiration date is reached. From then on, Apache forwards "If-Modified-Since" requests to Zope, Zope responds with an "304" response but without a new expiration date! As Apache does not get new expiration info, it continues to forward "If-Modified-Since" requests for the object. This significantly reduces cache efficiency. In my view, Zope should include new expiration info in its "304" responses. The CachingManager API may need to be extended, to allow the HTTP CacheManager to add information to "304" responses. -- Dieter