Re: [hybi] Fwd: New Version Notification for draft-mcmanus-httpbis-h2-websockets-01.txt

Kari Hurtta <hurtta-ietf@elmme-mailer.org> Fri, 10 November 2017 06:15 UTC

Return-Path: <khurtta@welho.com>
X-Original-To: hybi@ietfa.amsl.com
Delivered-To: hybi@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C07E612EB0D for <hybi@ietfa.amsl.com>; Thu, 9 Nov 2017 22:15:01 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001] 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 5yg8PU0DCBqE for <hybi@ietfa.amsl.com>; Thu, 9 Nov 2017 22:14:58 -0800 (PST)
Received: from welho-filter2.welho.com (welho-filter2.welho.com [83.102.41.24]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2DA0012EB37 for <hybi@ietf.org>; Thu, 9 Nov 2017 22:14:57 -0800 (PST)
Received: from localhost (localhost [127.0.0.1]) by welho-filter2.welho.com (Postfix) with ESMTP id 1349EB532F; Fri, 10 Nov 2017 08:14:56 +0200 (EET)
X-Virus-Scanned: Debian amavisd-new at pp.htv.fi
Received: from welho-smtp3.welho.com ([IPv6:::ffff:83.102.41.86]) by localhost (welho-filter2.welho.com [::ffff:83.102.41.24]) (amavisd-new, port 10024) with ESMTP id uuk4hQwEl5NC; Fri, 10 Nov 2017 08:14:55 +0200 (EET)
Received: from hurtta09lk.keh.iki.fi (89-27-39-95.bb.dnainternet.fi [89.27.39.95]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by welho-smtp3.welho.com (Postfix) with ESMTPS id 3A1312313; Fri, 10 Nov 2017 08:14:48 +0200 (EET)
In-Reply-To: <CAD3-0rPPGx4k+ksk-QDnNhnescfPHiYSJ-z2AQeMR2=khaO_HQ@mail.gmail.com>
References: <CAD3-0rPPGx4k+ksk-QDnNhnescfPHiYSJ-z2AQeMR2=khaO_HQ@mail.gmail.com>
To: Wenbo Zhu <wenboz@google.com>, Kazuho Oku <kazuhooku@gmail.com>
Date: Fri, 10 Nov 2017 08:14:53 +0200 (EET)
Sender: hurtta@hurtta09lk.keh.iki.fi
From: Kari Hurtta <hurtta-ietf@elmme-mailer.org>
CC: Patrick McManus <pmcmanus@mozilla.com>, hybi <hybi@ietf.org>, HTTP Working Group <ietf-http-wg@w3.org>, Kari Hurtta <hurtta-ietf@elmme-mailer.org>
X-Mailer: ELM [version ME+ 2.5 PLalpha46+]
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset="US-ASCII"
Message-Id: <20171110061456.1349EB532F@welho-filter2.welho.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/hybi/TPmNU8zrEqISNPiGZHgdcPabqEo>
Subject: Re: [hybi] Fwd: New Version Notification for draft-mcmanus-httpbis-h2-websockets-01.txt
X-BeenThere: hybi@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Server-Initiated HTTP <hybi.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/hybi>, <mailto:hybi-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/hybi/>
List-Post: <mailto:hybi@ietf.org>
List-Help: <mailto:hybi-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/hybi>, <mailto:hybi-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 10 Nov 2017 06:15:02 -0000

> Therefore the explicit tunneling mechanism is
> necessary to signal to proxies/frameworks that a full-duplex byte-stream is
> being tunneled as a http/2 stream.

>> Request:
>>   :method: GET
>>   :scheme: https
>>   :authority: server.example.com
>>   :path: /chat
>>   :upgrade: websocket

8.1.2.1.  Pseudo-Header Fields
https://tools.ietf.org/html/rfc7540#section-8.1.2.1

states

--------

   Pseudo-header fields are only valid in the context in which they are
   defined.  Pseudo-header fields defined for requests MUST NOT appear
   in responses; pseudo-header fields defined for responses MUST NOT
   appear in requests.  Pseudo-header fields MUST NOT appear in
   trailers.  Endpoints MUST treat a request or response that contains
   undefined or invalid pseudo-header fields as malformed
   (Section 8.1.2.6).

--------

Then that ":upgrade" works as explicit tunneling mechanism, IF you can trust
that response is treated as mailformed (stream error of type PROTOCOL_ERROR)
when proxies/frameworks does not subscribe that tunneling mechanism.

Can you trust that?

/ Kari Hurtta