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Re: Expires, Last-Modified, Pragma: no-cache etc.

From: John Franks <john@math.nwu.edu>
Date: Tue, 15 Aug 1995 23:50:03 -0500 (CDT)
Message-Id: <199508160450.XAA04365@hopf.math.nwu.edu>
To: Lou Montulli <montulli@mozilla.com>
Cc: john@math.nwu.edu, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
According to Lou Montulli:
> 
> I recently changed netscape to interpret "Pragma: no-cache" and not
> cache the object.  This is slightly different than a "Expires" header
> because the object will not even be cached for history navigation.
> (Documents that are expired are still shown when traversing the session
> history).  Haveing the client interpret "Pragma: no-cache" lets servers
> tell the client that this information is highly sensitive or volitile
> and should not be cached in any way.
> 

Well, I find this reasonable.  But, I believe that the latest version of
the spec says the client should ignore Pragma: no-cache.  What I think
is important is that there be some way to stop the client from caching
-- as apparently there now is with Netscape. :)

I don't care if it is Pragma: no-cache or if there is a separate way
(Pragma: no-local-cache ?) but apparently someone does since the spec
wants the client to ignore Pragma: no-cache.  Could someone  explain
the rationale for this?

John Franks
Received on Tuesday, 15 August 1995 21:51:43 EDT

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