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new type number versus repurpose of existing field | Re: SETTINGS_PRIORITY_SCHEME | Re: Setting to disable HTTP/2 Priorities

Kari Hurtta <hurtta-ietf@elmme-mailer.org> Thu, 08 August 2019 17:42 UTC

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To: Matthew Kerwin <matthew@kerwin.net.au>, HTTP Working Group <ietf-http-wg@w3.org>
Date: Thu, 08 Aug 2019 20:38:58 +0300
From: Kari Hurtta <hurtta-ietf@elmme-mailer.org>
CC: Lucas Pardue <lucaspardue.24.7@gmail.com>, Kari Hurtta <hurtta-ietf@elmme-mailer.org>, HTTP Working Group <ietf-http-wg@w3.org>, Brad Lassey <lassey@chromium.org>, Dmitri Tikhonov <dtikhonov@litespeedtech.com>
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Subject: new type number versus repurpose of existing field | Re: SETTINGS_PRIORITY_SCHEME | Re: Setting to disable HTTP/2 Priorities
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<  ⋯ >
> > In Montreal we also discussed a possible experiment where the H2 PRIORITY
> > frame contents would be repurposed, which requires a compatible server to
> > read it correctly. In this case the signal would be more like "will send in
> > an RFC7540-incompatible format".
> >
> > Lucas
> >
> 
> Eurgh, why?  Are we that short on frame types?
> 
> Cheers
> -- 
>   Matthew Kerwin
>   https://matthew.kerwin.net.au/

Yes, it makes sense to allocate new type number for PRIORITY when frame
content is repurposed.

Also is make sense to allocate new type number for HEADERS when 
"Stream Dependency" or "Weight" field of HEADERS frame conrent is repurposed.

That avaind dance about on what point on time change of  "Stream Dependency" / "Weight" field"
field happens.


If you are running out of framer's type numbers, reserve some number for
"extended type number". ☻

/ Kari Hurtta

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