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Re: [Webtransport] Confirming Consensus on WebTransport protocols

Lucas Pardue <lucaspardue.24.7@gmail.com> Wed, 13 January 2021 16:45 UTC

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From: Lucas Pardue <lucaspardue.24.7@gmail.com>
Date: Wed, 13 Jan 2021 16:44:49 +0000
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To: Ian Swett <ianswett=40google.com@dmarc.ietf.org>
Cc: Martin Thomson <mt@lowentropy.net>, WebTransport <webtransport@ietf.org>
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Subject: Re: [Webtransport] Confirming Consensus on WebTransport protocols
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Hi Ian,

On Wed, Jan 13, 2021 at 3:46 PM Ian Swett <ianswett=
40google.com@dmarc.ietf.org> wrote:

>
>
> On Tue, Jan 12, 2021 at 7:02 PM Martin Thomson <mt@lowentropy.net> wrote:
>
>> On Wed, Jan 13, 2021, at 04:25, David Schinazi wrote:
>> > The consensus was option 1A.
>>
>> Great!
>>
>> > The consensus was option 2A.
>>
>> I can live with that.  Can I request a brief summary of the reasons?
>>
>
> I asked a question like this during the interim, and I think it'd be worth
> clearly documenting the reasons, as I think it'd clarify our direction a
> bit.  The one that I clearly recall is that we'd have to re-invent many of
> the features that HTTP/3 provides, but I'm not clear why that's the case.
>

I made a comment along those lines. It was mainly motivated by Victor's PR
"Refactor client indication into a full header exchange" see
https://github.com/vasilvv/webtransport/pull/18. AFAICT this is merged into
the editors copy of draft-vvv-webtransport-quic but there is no published
I-D with this change in. Victor please correct me if I'm wrong.

Not that I'm not questioning whether the motivation behind needing more
flexibility of the client indication. But it highlights that we'll discover
more things that are needed or nice to have and require additions. My
concern is that inventing something that is similar to HTTP headers but not
actually HTTP is duplication and brings risks that we need to mirror the
engineering and design effort that has already gone into HTTP. As an
implementer, it seems better to reuse HTTP semantics (i.e code I have
already, or libraries) than to invent another HTTP-alike.

Cheers,

Lucas

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