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Re: Improving If-Modified-Since

From: Brian Behlendorf <brian@organic.com>
Date: Tue, 15 Aug 1995 14:44:55 -0700 (PDT)
To: Lou Montulli <montulli@mozilla.com>
Cc: Roy Fielding <fielding@beach.w3.org>, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
Message-Id: <Pine.SOL.3.91.950815144400.476B-100000@eat.organic.com>
On Tue, 15 Aug 1995, Lou Montulli wrote:
> > >In addition to supporting size=SIZE I encourage other server authors to
> > >do an _equals_ comparison rather than a greater than or equal comparison
> > >of the two dates.
> > 
> > Absolutely not -- that would be a violation of both the spec and the
> > intentions of IMS.  In addition to being a cache mechanism, it allows
> > a client to request a document "only if it has been changed in the last
> > fifteen minutes".  In this case, it may not know what the server's
> > Last-Modified date is prior to the request.
> 
> If it is a violation of the spec then you really ought to make the spec
> clearer on this point.  All the major servers that I know of do a
> greater than or equal comparison.  

...which is what Roy's saying the spec says they should do.

	Brian

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Received on Tuesday, 15 August 1995 14:57:16 EDT

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