Re: HTTP/2 plaintext upgrade

Daniel Stenberg <daniel@haxx.se> Thu, 26 January 2017 14:32 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 00818129612 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Thu, 26 Jan 2017 06:32:33 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.119
X-Spam-Level:
X-Spam-Status: No, score=-10.119 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-3.199, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
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 cOzi3fzN2RTE for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Thu, 26 Jan 2017 06:32:31 -0800 (PST)
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 2E22A12960F for <httpbisa-archive-bis2Juki@lists.ietf.org>; Thu, 26 Jan 2017 06:32:30 -0800 (PST)
Received: from lists by frink.w3.org with local (Exim 4.80) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1cWl3L-00031e-Vk for ietf-http-wg-dist@listhub.w3.org; Thu, 26 Jan 2017 14:29:32 +0000
Resent-Date: Thu, 26 Jan 2017 14:29:31 +0000
Resent-Message-Id: <E1cWl3L-00031e-Vk@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 <daniel@haxx.se>) id 1cWl3I-00030o-2X for ietf-http-wg@listhub.w3.org; Thu, 26 Jan 2017 14:29:28 +0000
Received: from giant.haxx.se ([80.67.6.50]) by titan.w3.org with esmtp (Exim 4.84_2) (envelope-from <daniel@haxx.se>) id 1cWl3B-0003ds-SO for ietf-http-wg@w3.org; Thu, 26 Jan 2017 14:29:22 +0000
Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.15.2/8.15.2/Debian-4) with ESMTPS id v0QESvYw016820 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Jan 2017 15:28:57 +0100
Received: from localhost (dast@localhost) by giant.haxx.se (8.15.2/8.15.2/Submit) with ESMTP id v0QESuCt016815; Thu, 26 Jan 2017 15:28:56 +0100
X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs
Date: Thu, 26 Jan 2017 15:28:56 +0100 (CET)
From: Daniel Stenberg <daniel@haxx.se>
X-X-Sender: dast@giant.haxx.se
To: Cory Benfield <cory@lukasa.co.uk>
cc: HTTP Working Group <ietf-http-wg@w3.org>
In-Reply-To: <AC89F2FD-F183-4B17-B528-60821D2D4EB8@lukasa.co.uk>
Message-ID: <alpine.DEB.2.20.1701261524350.26166@tvnag.unkk.fr>
References: <AC89F2FD-F183-4B17-B528-60821D2D4EB8@lukasa.co.uk>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
X-fromdanielhimself: yes
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII; format=flowed
Received-SPF: pass client-ip=80.67.6.50; envelope-from=daniel@haxx.se; helo=giant.haxx.se
X-W3C-Hub-Spam-Status: No, score=-7.8
X-W3C-Hub-Spam-Report: AWL=1.606, BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-3.199, SPF_PASS=-0.001, W3C_AA=-1, W3C_WL=-1
X-W3C-Scan-Sig: titan.w3.org 1cWl3B-0003ds-SO ab45174f70afa10d80ac91eb890ecaa3
X-Original-To: ietf-http-wg@w3.org
Subject: Re: HTTP/2 plaintext upgrade
Archived-At: <http://www.w3.org/mid/alpine.DEB.2.20.1701261524350.26166@tvnag.unkk.fr>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/33384
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 Thu, 26 Jan 2017, Cory Benfield wrote:

>> The content of the HTTP2-Settings header field is the payload of a SETTINGS 
>> frame
>
> Can I get an idea of what other implementers have done here?

A suppose many do like curl and use nghttp2_frame_pack_settings_payload() [1] 
for this. It is just a number of settings and their values encoded as section 
6.5.1 [2] describes

Right now I can't really remember exactly what sort of interop we have with 
this. I suspect we don't have too many users actually using h2 plaintext.

[1] = https://nghttp2.org/documentation/nghttp2_pack_settings_payload.html
[2] = http://httpwg.org/specs/rfc7540.html#SettingFormat

-- 

  / daniel.haxx.se