Re: [squid-users] squid and php-sites

By default it does not. The RFC does not require either way as there is
explicit headers for instructing caches, but common sense recommends not
to as such pages are often dynamically generated by programs not aware
of caching.

The refresh patterns are used, but only if there is no headers denying
the object from being cached.

If unsure use the cacheability engine to check the status of the page in
question.

Regards
Henrik

alp wrote:
>
> hi,
> i am not sure if squid is required to not cache sites without suitable
> headers (lastmod, expires,...).
> does anybody know?
> it seems as if for such objects the refresh-patterns are NOT used in
> squid.conf.
> is this right?
>
> thx in advance,
> alp
>
> ----- Original Message -----
> From: "SSCR Internet Admin" <admin@sscrmnl.edu.ph>
> To: "alp" <alpheus@gmx.de>
> Cc: <squid-users@squid-cache.org>
> Sent: Friday, February 14, 2003 1:11 AM
> Subject: RE: [squid-users] question concerning php-sites and caching -still
> some questions
>
> > some sites dont want their pages to cached, so i guess squid will
> eventually
> > reload pages.
> >
> > -----Original Message-----
> > From: alp [mailto:alpheus@gmx.de]
> > Sent: Wednesday, February 12, 2003 11:01 PM
> > Cc: squid-users@squid-cache.org
> > Subject: Re: [squid-users] question concerning php-sites and caching
> > -still some questions
> >
> >
> > thanks marc,
> >
> > i knowed this page already, it's a really nice one.
> > but my problem is: does squid never caches an object without validation
> > headers (expires, max-age, lastmod,...)?
> > if i have a refresh-pattern like
> > refresh_pattern . 0 20% 5
> > such an object should retain at most 5 minutes in cache, shouldn't it?
> > or is refresh_pattern only used if an object has validation headers?
> >
> > thx in advance,
> > alp
> >
> > ----- Original Message -----
> > From: "Marc Elsen" <marc.elsen@imec.be>
> > To: "alp" <alpheus@gmx.de>
> > Cc: <squid-users@squid-cache.org>
> > Sent: Wednesday, February 12, 2003 5:05 PM
> > Subject: Re: [squid-users] question concerning php-sites and caching
> >
> >
> > >
> > >
> > > alp wrote:
> > > >
> > > > hi,
> > > > i have on my webserver a simple php site which i query via squid 2.5.
> > > > this works (of course) and i see that no last_modified or
> expiry-header
> > is
> > > > replied, which is correct for dynamic sites, too, as far as i know
> > > > i have no cache_deny for php-sites and only the usual refresh_patterns
> > of
> > > > default squid.conf.
> > > >
> > > > squid does not cache this php side (also ok), but my question is: why?
> > > > is it hardcoded into squid not to cache php-sites, or is the missing
> of
> > > > expiry and last_mod headers the reason for this?
> > >
> > > Most probably, you may,for instance check objects (urls)
> > > with :
> > >
> > > http://www.ircache.net/cgi-bin/cacheability.py
> > >
> > > M.
> > >
> > > >
> > > > thx in advance,
> > > > alp
> > >
> > > --
> > >
> > > 'Time is a consequence of Matter thus
> > > General Relativity is a direct consequence of QM
> > > (M.E. Mar 2002)
> > >
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Received on Fri Feb 14 2003 - 06:36:09 MST