Allen Pulsifer wrote:
I'm still wondering why mod_cache sets the expires header (or
some other
parameter, that causes the headers to be set).
Anything that goes in the cache has to have some expiration date--it can't
just live forever. The manual explains how its computed.
- And if the cache settings are wisely set, I guess it makes sense to
put that time in an "Expires" header.. ;-)
And why GET and HEAD requests get different headers...
That kinda makes sense. If you aren't receiving the entity itself, then you
have nothing to cache, so why should the origin server bother telling you
when it expires?
It is an RFC 2626 requirement, that HEAD and GET returns the same
headers (http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.4).
The RFC mentions test purposes, and in this case, it would have been
nice, if the requests had the same Expires header.
Regards
Jonathan
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