Re: p1: Upgrade ordering (possible HTTP/2 impact)

Willy Tarreau <w@1wt.eu> Tue, 23 April 2013 17:20 UTC

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Date: Tue, 23 Apr 2013 19:19:17 +0200
From: Willy Tarreau <w@1wt.eu>
To: "William Chan (?????????)" <willchan@chromium.org>
Cc: Roberto Peon <grmocg@gmail.com>, Mark Nottingham <mnot@mnot.net>, "ietf-http-wg@w3.org Group" <ietf-http-wg@w3.org>
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Subject: Re: p1: Upgrade ordering (possible HTTP/2 impact)
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On Tue, Apr 23, 2013 at 10:16:25AM -0700, William Chan (?????????) wrote:
> I think adding the relative preference semantic is good.
> 
> I have to confess I was not aware of using Upgrade as a response header
> outside of a 101 or 426 response. This indeed sounds very similar to
> Alternate-Protocol. Is anyone actually using this in practice?

I don't think so, since Upgrade really started to be used with WebSocket.
However RFC2817 clearly mentions this possibility without speaking about
ordering, just about combinations.

Willy