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

http://www.squid-cache.org/mail-archive/squid-dev/200204/0707.html

On Sunday 28 April 2002 05:36, maer727@sohu.com wrote:
> 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 Sun Apr 28 2002 - 03:01:28 MDT