Re: p6: Returning the freshest response

Martin Thomson <martin.thomson@gmail.com> Fri, 29 March 2013 15:48 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 43BF921E8039 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Fri, 29 Mar 2013 08:48:50 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.524
X-Spam-Level:
X-Spam-Status: No, score=-10.524 tagged_above=-999 required=5 tests=[AWL=0.075, 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 behI8q8gkEz9 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Fri, 29 Mar 2013 08:48:49 -0700 (PDT)
Received: from frink.w3.org (frink.w3.org [128.30.52.56]) by ietfa.amsl.com (Postfix) with ESMTP id AE32D21F943E for <httpbisa-archive-bis2Juki@lists.ietf.org>; Fri, 29 Mar 2013 08:48:49 -0700 (PDT)
Received: from lists by frink.w3.org with local (Exim 4.72) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1ULbXT-0008HZ-Eq for ietf-http-wg-dist@listhub.w3.org; Fri, 29 Mar 2013 15:48:23 +0000
Resent-Date: Fri, 29 Mar 2013 15:48:23 +0000
Resent-Message-Id: <E1ULbXT-0008HZ-Eq@frink.w3.org>
Received: from lisa.w3.org ([128.30.52.41]) by frink.w3.org with esmtp (Exim 4.72) (envelope-from <martin.thomson@gmail.com>) id 1ULbXG-0008FA-U2 for ietf-http-wg@listhub.w3.org; Fri, 29 Mar 2013 15:48:10 +0000
Received: from mail-wg0-f44.google.com ([74.125.82.44]) by lisa.w3.org with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.72) (envelope-from <martin.thomson@gmail.com>) id 1ULbXF-0001zi-Qd for ietf-http-wg@w3.org; Fri, 29 Mar 2013 15:48:10 +0000
Received: by mail-wg0-f44.google.com with SMTP id z12so521513wgg.35 for <ietf-http-wg@w3.org>; Fri, 29 Mar 2013 08:47:43 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:cc:content-type:content-transfer-encoding; bh=C7WdauQfO9V9jDHEXPFohrsvm9EkXeLdXoRxy7y4SbQ=; b=OhanO4o9Rl4knOPo1nUE75F6msGTCY0f9GNiPvd1mcWyGbNBaxYpperCHWcRyAcaqX 4qrnB8zLJeHDhRqNFokQIbKJ5wDmRNy4JdR5BqvBSAjUu1qj5mNM3vM9ZcqN5f4Xo8I2 XNNrL4ZHOvoIRspM6ihwX0J6DSVZRTRkpEXA4FkNmCCTIqvD0J2tFyUoIDp5r/M/iFBx yoSjAAcxMqKOOhc4peZnZvKhTHQ44Nyz/52TOQ7hJKAOEpjaWrJZYeEfnj2+dt11mt0d SK3XxiBSvXUr0bXfO9pGmaknxQrijt0d/8TrvMv7brlzW6yq9zvM+ZLDUpGQks/20iO7 cUeQ==
MIME-Version: 1.0
X-Received: by 10.180.72.228 with SMTP id g4mr23138677wiv.22.1364572063643; Fri, 29 Mar 2013 08:47:43 -0700 (PDT)
Received: by 10.194.41.35 with HTTP; Fri, 29 Mar 2013 08:47:43 -0700 (PDT)
In-Reply-To: <E56A5FA7-555D-4283-95A1-FD0030D4616A@mnot.net>
References: <E56A5FA7-555D-4283-95A1-FD0030D4616A@mnot.net>
Date: Fri, 29 Mar 2013 08:47:43 -0700
Message-ID: <CABkgnnXbDfXN1KA-AfHcW=macw44hK346z0UuYMZYx8OXBZv4g@mail.gmail.com>
From: Martin Thomson <martin.thomson@gmail.com>
To: Mark Nottingham <mnot@mnot.net>
Cc: "ietf-http-wg@w3.org Group" <ietf-http-wg@w3.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Received-SPF: pass client-ip=74.125.82.44; envelope-from=martin.thomson@gmail.com; helo=mail-wg0-f44.google.com
X-W3C-Hub-Spam-Status: No, score=-3.5
X-W3C-Hub-Spam-Report: AWL=-2.675, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001
X-W3C-Scan-Sig: lisa.w3.org 1ULbXF-0001zi-Qd 09ee91eb1d8cda9fedd0b2b3f9f581da
X-Original-To: ietf-http-wg@w3.org
Subject: Re: p6: Returning the freshest response
Archived-At: <http://www.w3.org/mid/CABkgnnXbDfXN1KA-AfHcW=macw44hK346z0UuYMZYx8OXBZv4g@mail.gmail.com>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/17174
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 28 March 2013 20:10, Mark Nottingham <mnot@mnot.net> wrote:
> """
> If multiple selected responses are available, the cache will need to choose one to use. If a selecting header has a known mechanism for doing so (e.g., qvalues on Accept and similar request headers), it MAY be used to select one; otherwise, the most recent response (as determined by the Date header field) is used, as per Section 4.
> """

This seems good.  The "it" in "it MAY be used to select one" is
perhaps ambiguous, but I don't see how to fix it without making it
even harder to parse :)