Re:Re:Re: My opinions on nocache and nocache_hack. :-)

Thanks, Henrik pal!

I search "no_cache" in squid.conf and do not find any rules.
What are the rules you mentioned?

Another question, what means "may override the request"? Do you
mean in some cases even though the request asks the cache to remove
the object from cache, the object will still be kept in cache without
removing(so, it is on the contrary of the request)?

Best regards,
George Ma

----- Original Message -----
From: Henrik Nordstrom
To: maer727@sohu.com
Cc: squid-dev@squid-cache.org
Subject: Re:Re: My opinions on nocache and nocache_hack. :-)
Sent: Sat Apr 27 22:00:36 CST 2002

> No, they are not the same. Both indicates the user has requested the
> object must not be from the cache, but in case of nocache_hack there
> is squid.conf rules which may override the request.
>
>
>
> On Saturday 27 April 2002 14:20, maer727@sohu.com wrote:
> > Thanks, Henrik pal!
> >
> > I think nocache_hack means the cache should not cache the object.
> > I mean the meaning of no_cache and nocache_hack are the same.
> >
> > Am I correct?
> >
> > Best regards,
> > George Ma
> >
> > ----- Original Message -----
> > From: Henrik Nordstrom
> > To: maer727@sohu.com
> > Cc: squid-dev@squid-cache.org
> > Subject: Re: My opinions on nocache and nocache_hack. :-)
> > Sent: Sat Apr 27 15:43:25 CST 2002
> >
> > > maer727@sohu.com wrote:
> > > > Hi, pals!
> > > >
> > > > After reading severals of source codes, I think nocache_hack is
> > > > the same as nocache if HTTP_VIOLATIONS is defined. I have met
> > > > with serveral cases where we treat the two variables the same
> > > > if HTTP_VIOLATIONS is defined.
> > > >
> > > > Am I correct?
> > >
> > > Not entirely. nocache_hack is a special mode of dealing with
> > > no_cache. See the following code segment from client_side.c where
> > > the two flags are set in the request:
> > >
> > > if (no_cache) {
> > > #if HTTP_VIOLATIONS
> > > if (Config.onoff.reload_into_ims)
> > > request->flags.nocache_hack = 1;
> > > else if (refresh_nocache_hack)
> > > request->flags.nocache_hack = 1;
> > > else
> > > #endif
> > > request->flags.nocache = 1;
> > > }
> > >
> > >
> > > Config.onoff.reload_into_ims and refresh_nocache_hack depends on
> > > your squid.conf configuration (reload_into_ims, or the use of
> > > no-cache related options to refresh_pattern).
> > >
> > > Regards
> > > Henrik
Received on Sat Apr 27 2002 - 21:36:27 MDT