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Re: signatures vs sf-date

Julian Reschke <julian.reschke@gmx.de> Tue, 24 January 2023 05:54 UTC

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To: Mark Nottingham <mnot@mnot.net>
Cc: Lucas Pardue <lucaspardue.24.7@gmail.com>, ietf-http-wg@w3.org
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From: Julian Reschke <julian.reschke@gmx.de>
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Subject: Re: signatures vs sf-date
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On 24.01.2023 01:01, Mark Nottingham wrote:
>
>> On 24 Jan 2023, at 3:09 am, Julian Reschke <julian.reschke@gmx.de> wrote:
>>
>> What about a dictionary, where you're only looking for "x" (expected to
>> be an integer), but the sender adds an extension parameter "y" as sf-date?
>>
>> A conforming parser (of the current spec) will reject the whole field
>> value, and the recipient will not be able to see the value for "x".
>
> If you are parsing a field that uses Date, its specification will refer to sf-bis, not RFC8941. Therefore, you will need to use an implementation that claims conformance to sf-bis. What's the problem?

The problem is that a generic library will not lookup the header definition.

IMHO an important point of SF is that we can throw fields at the parser
without *any* out of band information. As we can see, this only works
great until we extend the format.

Best regards, Julian

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