Re: p1: Receiving a higher minor HTTP version number

Willy Tarreau <w@1wt.eu> Sat, 20 April 2013 06:30 UTC

Return-Path: <ietf-http-wg-request@listhub.w3.org>
X-Original-To: ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com
Delivered-To: ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4D84621F8EC7 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Fri, 19 Apr 2013 23:30:01 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.599
X-Spam-Level:
X-Spam-Status: No, score=-10.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_HI=-8]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PxHn-vUckPsJ for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Fri, 19 Apr 2013 23:30:00 -0700 (PDT)
Received: from frink.w3.org (frink.w3.org [128.30.52.56]) by ietfa.amsl.com (Postfix) with ESMTP id D1DDB21F8EBD for <httpbisa-archive-bis2Juki@lists.ietf.org>; Fri, 19 Apr 2013 23:30:00 -0700 (PDT)
Received: from lists by frink.w3.org with local (Exim 4.72) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1UTRIg-0003GS-I3 for ietf-http-wg-dist@listhub.w3.org; Sat, 20 Apr 2013 06:29:30 +0000
Resent-Date: Sat, 20 Apr 2013 06:29:30 +0000
Resent-Message-Id: <E1UTRIg-0003GS-I3@frink.w3.org>
Received: from lisa.w3.org ([128.30.52.41]) by frink.w3.org with esmtp (Exim 4.72) (envelope-from <w@1wt.eu>) id 1UTRId-0003Fh-Ot for ietf-http-wg@listhub.w3.org; Sat, 20 Apr 2013 06:29:27 +0000
Received: from 1wt.eu ([62.212.114.60]) by lisa.w3.org with esmtp (Exim 4.72) (envelope-from <w@1wt.eu>) id 1UTRId-0000fi-1M for ietf-http-wg@w3.org; Sat, 20 Apr 2013 06:29:27 +0000
Received: (from willy@localhost) by mail.home.local (8.14.4/8.14.4/Submit) id r3K6T4pV028491; Sat, 20 Apr 2013 08:29:04 +0200
Date: Sat, 20 Apr 2013 08:29:04 +0200
From: Willy Tarreau <w@1wt.eu>
To: Mark Nottingham <mnot@mnot.net>
Cc: "ietf-http-wg@w3.org Group" <ietf-http-wg@w3.org>
Message-ID: <20130420062904.GD26517@1wt.eu>
References: <F6462D1C-A086-42A1-9812-1B99E2E5775D@mnot.net>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <F6462D1C-A086-42A1-9812-1B99E2E5775D@mnot.net>
User-Agent: Mutt/1.4.2.3i
Received-SPF: pass client-ip=62.212.114.60; envelope-from=w@1wt.eu; helo=1wt.eu
X-W3C-Hub-Spam-Status: No, score=-3.4
X-W3C-Hub-Spam-Report: AWL=-2.683, RP_MATCHES_RCVD=-0.702, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001
X-W3C-Scan-Sig: lisa.w3.org 1UTRId-0000fi-1M 27243979a65b56f1d60beb40bac65596
X-Original-To: ietf-http-wg@w3.org
Subject: Re: p1: Receiving a higher minor HTTP version number
Archived-At: <http://www.w3.org/mid/20130420062904.GD26517@1wt.eu>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/17383
X-Loop: ietf-http-wg@w3.org
Resent-Sender: ietf-http-wg-request@w3.org
Precedence: list
List-Id: <ietf-http-wg.w3.org>
List-Help: <http://www.w3.org/Mail/>
List-Post: <mailto:ietf-http-wg@w3.org>
List-Unsubscribe: <mailto:ietf-http-wg-request@w3.org?subject=unsubscribe>

On Sat, Apr 20, 2013 at 02:07:17PM +1000, Mark Nottingham wrote:
> I don't see anything in p1 2.6 Protocol Versioning that explicitly says an
> implementation ought to accept a message that has the same major version
> number it implements, but a higher minor version number.
> 
> I think we need to spell this out, because IME some servers do error out on
> (for example) a HTTP/1.2 request.

Makes sense but I'm not sure that these implementations will change for
this these days anyway, with 2.0 coming. Also we have seen with the
1.0->1.1 transition that the minor change was not that seemless (specifically
due to persistent conns).

Willy