RE: [squid-users] Is it possible to serve stale content on ERR_RE AD_TIMEOUT?

Ok. I now see where I was going wrong. After digging through client_side.c I
can now see that if Last-Modified is not present, it will immeadiately
invalidate the STALE version, before making the request.

I was sending the following headers...

Cache-Control: public
Expires: <current time + 1 minute>

Shouldn't it do the same behaviour in this case as when the Last-Modified is
present?

thanks

Paul

-----Original Message-----
From: Henrik Nordstrom [mailto:hno@squid-cache.org]
Sent: 21 January 2003 21:33
To: Rhodes, Paul
Cc: 'squid-users@squid-cache.org'
Subject: Re: [squid-users] Is it possible to serve stale content on
ERR_READ_TIMEOUT?

tis 2003-01-21 klockan 19.04 skrev Rhodes, Paul:
> Hi.
>
> The subject line says it all really. Is it possible to configure squid to
> serve cached stale content if a request fails because the remote host is
> unavailable? I know this is probably outside of the HTTP spec.

Squid does so by default if it can.. or at least some times..

Detail: If squid refreshes a cached object and the refresh fails to
contact the origin server the cached object will be given.

However: If the client forces a cache bypass then the error will be
returned.

> If this is not possible currently, how difficult would the changes be to
> enable this? I have seen the offline_mode configuration parameter, and
> examined it in the code, but am not sure which area exactly I would have
to
> prod.

offline_node is related but not exacly this. It is more of a way to make
Squid be very aggressive about the freshness of what is has already in
it's cache.

Still the concerns with forced cache bypasses applies.

-- 
Henrik Nordstrom <hno@squid-cache.org>
MARA Systems AB, Sweden
Vodafone Global Content Services Limited 
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