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Re: WGLC p6 4.2.1

"Poul-Henning Kamp" <phk@phk.freebsd.dk> Mon, 18 March 2013 12:07 UTC

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To: "Adrien W. de Croy" <adrien@qbik.com>
cc: Amos Jeffries <squid3@treenet.co.nz>, "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
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From: Poul-Henning Kamp <phk@phk.freebsd.dk>
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Date: Mon, 18 Mar 2013 12:05:11 +0000
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Subject: Re: WGLC p6 4.2.1
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In message <em94119d23-43b0-4de4-a3e3-8c30e8a40bfc@bombed>, "Adrien W. de Croy" writes:

>>>for instance a cache receiving a request with If-Modified-Since later
>>>than its own Last-Modified, may presume the client has a later copy,=20
>>>and
>>>discard its own copy.
>>
>>Uhm, so you're saying I can clean the entire cache with bogos IMS
>>requests ?
>
>that's not the point.

It very much is:  A cache would have to be stupid to make that
assumption, and we should not be protecting stupid mistakes with
the specification, we should make things work.

No matter what you write in the specification, you will have IMS
headers with non-server-supplied timestamps, because it is possible
and there are legitimate use-cases.

We can discuss if the text expresses this optimally, but there is
no way the text can put this particular genie back in his bottle.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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