Re: 103 (Early Hints) vs. response headers
Kazuho Oku <kazuhooku@gmail.com> Wed, 29 March 2017 20:31 UTC
Return-Path: <ietf-http-wg-request+bounce-httpbisa-archive-bis2juki=lists.ie@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 E404C128BB7 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Wed, 29 Mar 2017 13:31:06 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.501
X-Spam-Level:
X-Spam-Status: No, score=-6.501 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_HI=-5, RCVD_IN_SORBS_SPAM=0.5, RP_MATCHES_RCVD=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ECqZmrCDxJll for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Wed, 29 Mar 2017 13:31:05 -0700 (PDT)
Received: from frink.w3.org (frink.w3.org [128.30.52.56]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0D45C127BA3 for <httpbisa-archive-bis2Juki@lists.ietf.org>; Wed, 29 Mar 2017 13:31:04 -0700 (PDT)
Received: from lists by frink.w3.org with local (Exim 4.80) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1ctKCM-0002F2-Oz for ietf-http-wg-dist@listhub.w3.org; Wed, 29 Mar 2017 20:28:06 +0000
Resent-Date: Wed, 29 Mar 2017 20:28:06 +0000
Resent-Message-Id: <E1ctKCM-0002F2-Oz@frink.w3.org>
Received: from titan.w3.org ([128.30.52.76]) by frink.w3.org with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from <kazuhooku@gmail.com>) id 1ctKBy-0002CE-Hq for ietf-http-wg@listhub.w3.org; Wed, 29 Mar 2017 20:27:42 +0000
Received: from mail-pg0-f44.google.com ([74.125.83.44]) by titan.w3.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from <kazuhooku@gmail.com>) id 1ctKBs-0006BP-9Y for ietf-http-wg@w3.org; Wed, 29 Mar 2017 20:27:37 +0000
Received: by mail-pg0-f44.google.com with SMTP id 81so17578176pgh.2 for <ietf-http-wg@w3.org>; Wed, 29 Mar 2017 13:27:15 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=cLhY0uYtFfq6/nHtpxO3BkJM8KA/Jm/1yrNkI9IRsvs=; b=aQmWImkWeeqyMDcXc9GWlDM+d185QMp4M0ma88XPk0agZOpavEDv+FTk33t/cYsIsS lXtQfOvv6EXEVup8yxiPbiOpsxViK9mf1rWQc6hULdcSNG6fDXpBeBn+anKfuWSmSWuA AIYpssJpbAsCLx2ck/k+E6S6ff3r8MP/t0EdCkDp0qw3RYC3mINSrJm0c2uPoFD63iMp 2yRurQSj0dfToKvnrdJHB2S/6lrjQKrEEKdnVRjKGdctzfR8IHS4UMrLR/cTTqc+RpUW x2fviK3bUJILnVMhd0V8HOCSZ/72TfYv17YspBwU2mHfazXBBnPwqDk/FRLk+ZqRMh+E QLBQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=cLhY0uYtFfq6/nHtpxO3BkJM8KA/Jm/1yrNkI9IRsvs=; b=BdEMayMHWB13tjX1gibY4oNvK4Sxh5Y4HJM/j8fmJzJiVdFI3BLsGsxs/ViY5pymo0 fCcL3THTsukTbcLusCR4Cc5Lnga/sN8Uzmhd2brQv8uaOYrtunNnfry3T8WnZEBrkYIc UGCR1eaJMs9gekPJqZCj5tRy8h/+YcpSNRRKuroEorg1zJjBoudyyaNaNYFVqk0DcNeL RPUcT/HIyX3HK3+V2JO+bABtm662Qc8FcQqvYX40e0S9WR5hyzYzZP4nqP/sC6dtQxif 0Jr3SMjnEptUV8YwVIxFwK9sqwgxkRocvCkTWyQBUYeJdWelrRjo36EhNfLfMx2K1+2E Cxdg==
X-Gm-Message-State: AFeK/H2YuYwfPl4F/6WxXPWGBc0Q8FS8HV0kBHeklyPKPQ8v4kctMfFvip+I+tkn2GN8+BN1jr7sg2gcDr0SEw==
X-Received: by 10.99.61.201 with SMTP id k192mr2469278pga.68.1490819229295; Wed, 29 Mar 2017 13:27:09 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.100.167.76 with HTTP; Wed, 29 Mar 2017 13:27:08 -0700 (PDT)
In-Reply-To: <CANatvzxoqDhDh0KgG3Jw29GQdrvL6GQjXPJUYiDiKJ-hPNt2GQ@mail.gmail.com>
References: <CALHHdhwQBfBN0Xz-4kxRJrJekiCLnro1i-MVw954wTRyOWAtvw@mail.gmail.com> <E10BB6E0-3BD8-44EC-AE18-076D38077371@mnot.net> <CANatvzxS7Z9U5Jr2N_EeyY5NUrZ-weuGsetuUQdLWGGOQKVLNw@mail.gmail.com> <20170315062242.GB13814@1wt.eu> <CANatvzyeYxHFDDh-Hms6V0gJ+MkgW6v78uLj9bieR_nAaOfPHw@mail.gmail.com> <20170316143158.GB15641@1wt.eu> <CANatvzxoqDhDh0KgG3Jw29GQdrvL6GQjXPJUYiDiKJ-hPNt2GQ@mail.gmail.com>
From: Kazuho Oku <kazuhooku@gmail.com>
Date: Wed, 29 Mar 2017 15:27:08 -0500
Message-ID: <CANatvzx7ct=5csAn3kWAFgc9UbHrbtk7z+uZWKLJWj4YtJSh0Q@mail.gmail.com>
To: Willy Tarreau <w@1wt.eu>
Cc: Mark Nottingham <mnot@mnot.net>, Vasiliy Faronov <vfaronov@gmail.com>, HTTP Working Group <ietf-http-wg@w3.org>
Content-Type: text/plain; charset="UTF-8"
Received-SPF: pass client-ip=74.125.83.44; envelope-from=kazuhooku@gmail.com; helo=mail-pg0-f44.google.com
X-W3C-Hub-Spam-Status: No, score=-5.5
X-W3C-Hub-Spam-Report: AWL=0.768, BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-2.8, RCVD_IN_SORBS_SPAM=0.5, SPF_PASS=-0.001, W3C_AA=-1, W3C_WL=-1
X-W3C-Scan-Sig: titan.w3.org 1ctKBs-0006BP-9Y 1fa352d93e94e7d786624991e7362001
X-Original-To: ietf-http-wg@w3.org
Subject: Re: 103 (Early Hints) vs. response headers
Archived-At: <http://www.w3.org/mid/CANatvzx7ct=5csAn3kWAFgc9UbHrbtk7z+uZWKLJWj4YtJSh0Q@mail.gmail.com>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/33791
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>
Hi! 2017-03-16 10:10 GMT-05:00 Kazuho Oku <kazuhooku@gmail.com>: > Therefore, my preference goes to explicitly stating that the headers > of a 103 response must not be applied as part of the informational > response, and if there's a need in practice to make such distinction, > introduce negotiation to Early Hints. I have uploaded -01[1]. The only change from -00 is that it now explicitly forbids processing the headers of an 103 response as part of the informational response. I believe that we have not reached a consensus, but I hope that having the draft standing on one side would accelerate the debate. [1] https://datatracker.ietf.org/doc/draft-ietf-httpbis-early-hints/?include_text=1 > 2017-03-16 23:31 GMT+09:00 Willy Tarreau <w@1wt.eu>: >> Hi Kazuho, >> >> On Thu, Mar 16, 2017 at 10:55:31PM +0900, Kazuho Oku wrote: >>> >> So to me it seems that if we state in Early Hints that the headers of >>> >> a 103 response is ones that are applied (speculatively) to the final >>> >> response but not the informational response itself, then we'd be >>> >> overriding RFC 6265. >>> > >>> > I'm not seeing it this way. In fact you may decide to put some headers >>> > there for this exact reason : while 1xx MAY be ignored, those implementing >>> > 103 MAY/WILL consider them. And you're sending 103 hoping that someone >>> > will make good use of it, not as a guarantee, so I don't think it >>> > contradicts 6265. >>> >>> While I would not say that RFC 6265 and Early Hints would contradict, >>> I still think that the requirement of how a Set-Cookie header _can_ be >>> handled is narrowed by Early Hints. Consider the response below. >>> >>> HTTP/1.1 103 Early Hints >>> Set-Cookie: a=b >>> >>> HTTP/1.1 200 OK >>> Content-Type: text/plain; charset=utf-8 >>> Content-Length: 12 >>> >>> Hello world >>> >>> RFC 6265 allows the client to store cookie `a` by stating that a >>> client MAY accept a Set-Cookie header within any 100-level response. >>> >>> If we are to state in Early Hints that the headers of a 103 response >>> are to be applied (speculatively) to the final response but not to the >>> informational response itself, we would effectively be forbidding such >>> behavior for clients that implements 103. >>> >>> In other words, a client that _do_ recognize a Set-Cookie header in >>> 100-level responses (it is a MAY in RFC 7230 section 6.2) would need >>> to special-case the handling of 103. From server-side perspective, it >>> would continue to be unable to expect whether if the client would >>> accept or ignore the set-cookie header in a 103 response since there >>> is no negotiation for Early Hints. >>> >>> To me this seems like a variation of what was pointed out by Vasiliy >>> (by using the Warnings header). >> >> Hmmm I see, indeed you can end up in an unknown state there. But maybe >> once properly documented it can be turned to a benefit for improved >> deployment. Let's consider this for example : >> >> HTTP/1.1 103 Early Hints >> Set-Cookie: cookie_support_on_103=yes >> >> HTTP/1.1 200 OK >> Content-Type: text/plain; charset=utf-8 >> Set-Cookie: this_is_a_regular=application_cookie >> Content-Length: 12 >> >> Hello world >> >> The server can detect in a subsequent request whether or not the path is >> clean. And by registering a standard cookie name for this use case we >> could even end up with the first request sending the information regarding >> this support from the browser based on the learning from a previous call >> without ever conflicting with application cookies, meaning that on subsequent >> calls the server may decide to pass much more info on the 103 response. Of >> course the cookie name and value would have to be much shorter than in the >> example above :-) >> >> Willy > > > > -- > Kazuho Oku -- Kazuho Oku
- 103 (Early Hints) vs. response headers Vasiliy Faronov
- Re: 103 (Early Hints) vs. response headers Mark Nottingham
- Re: 103 (Early Hints) vs. response headers Kazuho Oku
- Re: 103 (Early Hints) vs. response headers Vasiliy Faronov
- Re: 103 (Early Hints) vs. response headers Kazuho Oku
- Re: 103 (Early Hints) vs. response headers Kazuho Oku
- Re: 103 (Early Hints) vs. response headers Willy Tarreau
- Re: 103 (Early Hints) vs. response headers Kazuho Oku
- Re: 103 (Early Hints) vs. response headers Willy Tarreau
- Re: 103 (Early Hints) vs. response headers Kazuho Oku
- Re: 103 (Early Hints) vs. response headers Stefan Eissing
- Re: 103 (Early Hints) vs. response headers Mark Nottingham
- Re: 103 (Early Hints) vs. response headers Kazuho Oku
- Re: 103 (Early Hints) vs. response headers Kazuho Oku
- Re: 103 (Early Hints) vs. response headers Stefan Eissing