Antwort: Re: Antwort: [Mod_gzip] [ANNOUNCEMENT] mod_gzip 1.3.26.1a

[mod_gzip@lists.over.net]

Hi Christian,


>> This will also disable caching.
> Not disable. It will make it hard to cache the request and the
> proxy has to save lots of variants, but it should not disable it.

if the proxy is able to detect that two content variants
it has to store inside its cache are identical (by computing
some hash code over the content) then it would even be able
to store the content only twice (compressed and uncompressed)
and additionally store a lot of different HTTP headers that
would point to one of these two stored versions.

I don't know whether there already is some proxy out there
that is able to do this (I didn't yet test Squid 2.5 with a
"Vary: UserAgent" case) ... but in principle this seems quite
possible to me.

On the other hand, it is the server that _should_ have helped
the proxy by sending a proper ETag, so that the proxy can
detect identical copies without having to do any calculation
on its own. But this is still to be implemented into mod_gzip.



Regards, Michael