p1/p2: 203 Non-Authoritative Information

Mark Nottingham <mnot@mnot.net> Tue, 23 April 2013 06:03 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 28ABE21F9389 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Mon, 22 Apr 2013 23:03:27 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.5
X-Spam-Level:
X-Spam-Status: No, score=-10.5 tagged_above=-999 required=5 tests=[AWL=0.099, 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 YXr02tVGuaMa for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Mon, 22 Apr 2013 23:03:26 -0700 (PDT)
Received: from frink.w3.org (frink.w3.org [128.30.52.56]) by ietfa.amsl.com (Postfix) with ESMTP id 2423E21F93A3 for <httpbisa-archive-bis2Juki@lists.ietf.org>; Mon, 22 Apr 2013 23:03:26 -0700 (PDT)
Received: from lists by frink.w3.org with local (Exim 4.72) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1UUWJT-0002Jr-TH for ietf-http-wg-dist@listhub.w3.org; Tue, 23 Apr 2013 06:02:47 +0000
Resent-Date: Tue, 23 Apr 2013 06:02:47 +0000
Resent-Message-Id: <E1UUWJT-0002Jr-TH@frink.w3.org>
Received: from maggie.w3.org ([128.30.52.39]) by frink.w3.org with esmtp (Exim 4.72) (envelope-from <mnot@mnot.net>) id 1UUWJQ-0002Gr-I1 for ietf-http-wg@listhub.w3.org; Tue, 23 Apr 2013 06:02:44 +0000
Received: from mxout-08.mxes.net ([216.86.168.183]) by maggie.w3.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from <mnot@mnot.net>) id 1UUWJP-0005Tf-Kc for ietf-http-wg@w3.org; Tue, 23 Apr 2013 06:02:44 +0000
Received: from [192.168.1.80] (unknown [118.209.190.66]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by smtp.mxes.net (Postfix) with ESMTPSA id 12D4B509B5 for <ietf-http-wg@w3.org>; Tue, 23 Apr 2013 02:02:21 -0400 (EDT)
From: Mark Nottingham <mnot@mnot.net>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Message-Id: <3D1F7A72-16E6-44A5-91DB-650032E55F9C@mnot.net>
Date: Tue, 23 Apr 2013 16:02:18 +1000
To: "ietf-http-wg@w3.org Group" <ietf-http-wg@w3.org>
Mime-Version: 1.0 (Mac OS X Mail 6.3 \(1503\))
X-Mailer: Apple Mail (2.1503)
Received-SPF: pass client-ip=216.86.168.183; envelope-from=mnot@mnot.net; helo=mxout-08.mxes.net
X-W3C-Hub-Spam-Status: No, score=-3.4
X-W3C-Hub-Spam-Report: AWL=-3.374, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001
X-W3C-Scan-Sig: maggie.w3.org 1UUWJP-0005Tf-Kc b12efe976f11dcb445010e564694f313
X-Original-To: ietf-http-wg@w3.org
Subject: p1/p2: 203 Non-Authoritative Information
Archived-At: <http://www.w3.org/mid/3D1F7A72-16E6-44A5-91DB-650032E55F9C@mnot.net>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/17480
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>

We define 203 in p2 as being applicable when the content has been modified by an intermediary;

> The 203 (Non-Authoritative Information) status code indicates that the request was successful but the enclosed payload has been modified from that of the origin server's 200 (OK) response by a transforming proxy (Section 5.7.2 of [Part1]). This status code allows the proxy to notify recipients when a transformation has been applied, since that knowledge might impact later decisions regarding the content. For example, future cache validation requests for the content might only be applicable along the same request path (through the same proxies).

However, 203 isn't mentioned anywhere in <https://svn.tools.ietf.org/svn/wg/httpbis/draft-ietf-httpbis/latest/p1-messaging.html#message.transformations>. It seems like it should either be mentioned as an appropriate thing to use there, or deprecated.


--
Mark Nottingham   http://www.mnot.net/