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Re: Proposal for i23: no-store invalidation

From: Mark Nottingham <mnot@mnot.net>
Date: Tue, 8 Apr 2008 10:19:51 +1000
Cc: HTTP Working Group <ietf-http-wg@w3.org>
Message-Id: <2C853501-597E-4C4A-8188-AF50AF8C08A1@mnot.net>
To: Henrik Nordstrom <henrik@henriknordstrom.net>

That seems like a different issue.

On 06/04/2008, at 8:25 AM, Henrik Nordstrom wrote:

>
> tor 2008-04-03 klockan 13:17 +1100 skrev Mark Nottingham:
>
>> My reading is that we think that no change is necessary here.
>
> Not sure. It would make sense to generalize the HEAD invalidation to
> also apply to GET responses. i.e. copy the text from HEAD to GET as
> well. There is a whole family of uncachable responses, and the result
> things can get very surprising  if caches do not invalidate the older
> copy when the resource has obviously changed even if the current
> representation can not be cached..
>
> But no-store in itself is not a parameter to that decision, only the
> fact that the response is significantly different from the cached  
> copy.
>
> And it's not about caches deleting the cached copy, only  
> invalidating it
> (threat it as stale on future requests).
>
> Regards
> Henrik
>
>


--
Mark Nottingham     http://www.mnot.net/
Received on Tuesday, 8 April 2008 00:20:27 GMT

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