Re: [I18ndir] Review volunteer needed (Fwd: [dispatch] WGLC of draft-ietf-dispatch-javascript-mjs-07)

"Asmus Freytag (c)" <asmusf@ix.netcom.com> Thu, 30 April 2020 06:39 UTC

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To: John C Klensin <john-ietf@jck.com>, i18ndir@ietf.org
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From: "Asmus Freytag (c)" <asmusf@ix.netcom.com>
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Date: Wed, 29 Apr 2020 23:39:20 -0700
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Subject: Re: [I18ndir] Review volunteer needed (Fwd: [dispatch] WGLC of draft-ietf-dispatch-javascript-mjs-07)
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On 4/29/2020 9:09 PM, John C Klensin wrote:
> (iii) Mislabeled content is just bad news for all sorts of
> reasons as I have been discovering when one of the mail systems
> of a very large vendor are identifying message bodies as
> 'text/plain; charset="UTF-8"' and then sending UTF-16, BOM and
> all.  Anything that can be done to discourage that sort of
> nonsense --or, if not, to describe carefully want should be done
> when it is encountered would be, IMO, A Good Thing.
>
> The I-D, in its present form, does none of that.

Identifying data that contradict the declaration is the first step.

Tossing it with prejudice would probably be better than fixing it.

However, all of that requires BOM sniffing - I don't think we can
get away from being aware what a BOM is and skipping it
if present -- an "extra" BOM is merely
a redundancy whereas an "inconsistent" one is a contradiction
in terms -- and those are two fundamentally different things.

A./

PS: tossing malformed input for other reasons than BOM might
be cleaner from a security perspective. But not an expert.