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

As I said in the previous message: refresh_pattern IS USED for replies
with no validation headers.

Only if the content is EXPLICITLY MARKED AS NOT CACHEABLE (or NOT
CACHEABLE) by the server is refresh_pattern not used by Squid.

Regards
Henrik

alp wrote:
>
> thx henrik,
>
> is it possible to change squid's behaviour to use a refresh-pattern for such
> sites, too? (without changing the source code) I mean sites without any
> validation headers.
>
> I know this may cause a lot problems, but it may also be useful sometimes.
>
> ----- Original Message -----
> From: "Henrik Nordstrom" <hno@squid-cache.org>
> To: "alp" <alpheus@gmx.de>
> Cc: <squid-users@squid-cache.org>
> Sent: Friday, February 14, 2003 2:30 PM
> Subject: 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 - 07:18:19 MST