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Re: treating invalid parameters in Content-Disposition

From: Adam Barth <w3c@adambarth.com>
Date: Sun, 3 Oct 2010 12:03:01 -0700
Message-ID: <AANLkTi=hasOVrsx8UqXJ1MsA7aTVdSpb5fBzykTJ_Nqd@mail.gmail.com>
To: Julian Reschke <julian.reschke@gmx.de>
Cc: Bjoern Hoehrmann <derhoermi@gmx.net>, Mark Nottingham <mnot@mnot.net>, HTTP Working Group <ietf-http-wg@w3.org>
On Sun, Oct 3, 2010 at 11:45 AM, Julian Reschke <julian.reschke@gmx.de> wrote:
> On 03.10.2010 20:08, Adam Barth wrote:
>> On Sun, Oct 3, 2010 at 6:44 AM, Julian Reschke<julian.reschke@gmx.de>
>>  wrote:
>>> On 02.10.2010 21:46, Bjoern Hoehrmann wrote:
>>>> tersection of what works in all major browsers and what actually occurs
>>>> in practise where it is more than a slight inconvenience for the user
>>>> if the header is ignored alltogether, we won't end up with something
>>>> that's noticably different than what's in the draft.
>>>
>>> Exactly. I don't see any interop for malformed headers right now. There's
>>> nothing to be standardized, and also, nothing that *needs* to be
>>> standardized.
>>
>> That's true from the server's perspective.  Servers are interested in
>> generating headers that work in the intersection of user agent
>> behavior.  User agents, however, are interested in processing the
>> maximal subset of Content-Disposition headers generated by servers.
>
> OK, so I think the interesting question is: is the subset where there *is*
> interop today any bigger than the one defined in the spec?

That's the interesting question for folks who wish to generate the
header.  The question for folks who want to consume the header is
different.  The operative question is "what single semantic theory
captures the intended semantics of the largest number of messages
generated in practice?"  These two things are quite likely to be
different in this case.  (I'm writing up a longer message explaining
this statement.)

Adam
Received on Sunday, 3 October 2010 19:04:06 GMT

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