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Re: [Json] secdir review of draft-ietf-jsonbis-rfc7159bis-03

Julian Reschke <julian.reschke@gmx.de> Sun, 12 March 2017 09:14 UTC

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To: Peter Cordell <petejson@codalogic.com>, Ned Freed <ned.freed@mrochek.com>
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From: Julian Reschke <julian.reschke@gmx.de>
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Date: Sun, 12 Mar 2017 10:14:04 +0100
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Cc: draft-ietf-jsonbis-rfc7159bis.all@ietf.org, John Cowan <cowan@ccil.org>, ietf@ietf.org, secdir@ietf.org, "json@ietf.org" <json@ietf.org>, Benjamin Kaduk <kaduk@mit.edu>
Subject: Re: [Json] secdir review of draft-ietf-jsonbis-rfc7159bis-03
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On 2017-03-12 10:06, Peter Cordell wrote:
> ...
>> This exact issue just came up in a media type review, where someone
>> specified a charset parameter because they weren't aware of this
>> algorithm.
>>
>> It would be very helpful to have this text in the RFC.
>
>
> Although it does need slightly more detail to take into account
> endian-ness in the case of UTF-16 and -32.
> ...

Does anybody recall why we removed 
<https://tools.ietf.org/html/rfc4627#section-3>:

> 3.  Encoding
>
>    JSON text SHALL be encoded in Unicode.  The default encoding is
>    UTF-8.
>
>    Since the first two characters of a JSON text will always be ASCII
>    characters [RFC0020], it is possible to determine whether an octet
>    stream is UTF-8, UTF-16 (BE or LE), or UTF-32 (BE or LE) by looking
>    at the pattern of nulls in the first four octets.
>
>            00 00 00 xx  UTF-32BE
>            00 xx 00 xx  UTF-16BE
>            xx 00 00 00  UTF-32LE
>            xx 00 xx 00  UTF-16LE
>            xx xx xx xx  UTF-8

?

Best regards, Julian

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