Re: [art] [Technical Errata Reported] RFC7578 (5616)

Alessandro Vesely <vesely@tana.it> Thu, 31 January 2019 18:53 UTC

Return-Path: <vesely@tana.it>
X-Original-To: art@ietfa.amsl.com
Delivered-To: art@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DB273130E62 for <art@ietfa.amsl.com>; Thu, 31 Jan 2019 10:53:15 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.301
X-Spam-Level:
X-Spam-Status: No, score=-4.301 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1152-bit key) header.d=tana.it
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 7bDqIHJPXtf8 for <art@ietfa.amsl.com>; Thu, 31 Jan 2019 10:53:14 -0800 (PST)
Received: from wmail.tana.it (wmail.tana.it [62.94.243.226]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0F395124BAA for <art@ietf.org>; Thu, 31 Jan 2019 10:53:13 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tana.it; s=gamma; t=1548960789; bh=QL0IEfy2BJ62R2grCV95sD1sPgfcdHp3dIPnhPnNxYw=; l=1429; h=To:References:From:Date:In-Reply-To; b=AFx0ZXr1+P6/A/8fN+3zmZQTiYyCpP8JdvNUfD+/hGIMERZfTyTREujDlmpNsdKX0 9H6jLaDBwXXiSgSdCK25tOgpMs59S+C0KxhdNvLwIoh+nsTefarTaeAlUnPs3UUpwJ TVlzGUVtBft34D4V3DTjfmqtgaUvw9cFA+e5F43nsgtk/Rvnt+SrxY8gCQmBk
Authentication-Results: tana.it; auth=pass (details omitted)
Received: from [172.25.197.111] (pcale.tana [172.25.197.111]) (AUTH: CRAM-MD5 uXDGrn@SYT0/k) by wmail.tana.it with ESMTPA; Thu, 31 Jan 2019 19:53:09 +0100 id 00000000005DC03D.000000005C534415.0000600C
To: art@ietf.org
References: <20190131182019.C9AAB200D8F70C@ary.qy>
From: Alessandro Vesely <vesely@tana.it>
Openpgp: id=0A5B4BB141A53F7F55FC8CBCB6ACF44490D17C00
Message-ID: <2c563659-2798-998a-b392-b91c583bf590@tana.it>
Date: Thu, 31 Jan 2019 19:53:09 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0
MIME-Version: 1.0
In-Reply-To: <20190131182019.C9AAB200D8F70C@ary.qy>
Content-Type: text/plain; charset="utf-8"
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/art/XODUhykbfDBZ0uJ8AZ_EyDKs7FU>
Subject: Re: [art] [Technical Errata Reported] RFC7578 (5616)
X-BeenThere: art@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Applications and Real-Time Area Discussion <art.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/art>, <mailto:art-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/art/>
List-Post: <mailto:art@ietf.org>
List-Help: <mailto:art-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/art>, <mailto:art-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 31 Jan 2019 18:53:16 -0000

On Thu 31/Jan/2019 19:20:19 +0100 John Levine wrote:

> In article <87va251q01.fsf@hobgoblin.ariadne.com> you write:
>>> Section 4.7 says that "Senders SHOULD NOT generate any parts with a Content-Transfer-Encoding header field."
>>
>>The "Original Text" gives an example, which seems to me to be correct.
>>However, as the erratum notes, the example violates the SHOULD NOT in
>>section 4.7.  And as section 4.7 notes, "Currently, no deployed
>>implementations that send such bodies have been discovered.", suggesting
>>that the example is not representative of current practice.
>>
>>But the proposed "Corrected Text" is itself incorrect, in that the
>>Content-Transfer-Encoding header is still present -- the given body
>>isn't valid for quoted-printable.
> 
> I'd leave it alone.  The example makes sense as is -- we don't
> encourage encoding the data but if you have to, here's how to do it.
> 
> At most hold for update to either redo the example with no encoding or
> add a warning about why this is a bad example.


Redoing the example without visible encoding (possibly writing € instead of
<eu>) would make little sense, as the reader cannot check what character set is
being used, which is what the example means to show.  Alternatively, it could
say "where <eu> is the Euro symbol encoded in UTF-8", to make the example
comprehensible, but still less clear than it is now.


Best
Ale
--