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Re: [Json] BOMs

Henri Sivonen <hsivonen@hsivonen.fi> Thu, 21 November 2013 13:28 UTC

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References: <AA45B3C6-1DC5-4B1E-8045-C9FE76022584@vpnc.org> <CEA92854.2CC53%jhildebr@cisco.com> <20131113224737.GI31823@mercury.ccil.org> <f5bob5n71y7.fsf@troutbeck.inf.ed.ac.uk> <5284B095.4070004@it.aoyama.ac.jp> <C37B2FE59C164DBCA982AC81A56A09AA@codalogic> <f5bk3g6ufqy.fsf@troutbeck.inf.ed.ac.uk> <5289F974.9020709@it.aoyama.ac.jp> <020401cee50f$a2cdf5c0$4001a8c0@gateway.2wire.net> <528B46EA.4040503@it.aoyama.ac.jp> <43255615-2FC9-4726-99FD-1B13D6B1F033@wirfs-brock.com> <f5br4ackyqm.fsf@troutbeck.inf.ed.ac.uk> <528C5445.3050600@it.aoyama.ac.jp> <A20405C4-F7AA-4141-AE19-222708A096F7@wirfs-brock.com>
Date: Thu, 21 Nov 2013 15:28:43 +0200
Message-ID: <CANXqsR+KwYJyZgCLB+b7P6O3=EgY3io-XwvuBLsfWOQ8zbp8Ww@mail.gmail.com>
Subject: Re: [Json] BOMs
From: Henri Sivonen <hsivonen@hsivonen.fi>
To: Allen Wirfs-Brock <allen@wirfs-brock.com>
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Cc: John Cowan <cowan@mercury.ccil.org>, "Henry S. Thompson" <ht@inf.ed.ac.uk>, Pete Cordell <petejson@codalogic.com>, JSON WG <json@ietf.org>, www-tag <www-tag@w3.org>, es-discuss <es-discuss@mozilla.org>, Anne van Kesteren <annevk@annevk.nl>, IETF Discussion <ietf@ietf.org>
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On Thu, Nov 21, 2013 at 7:53 AM, Allen Wirfs-Brock
<allen@wirfs-brock.com> wrote:
> Just to be clear about this.  My tests directly tested JavaScript built-in
> JSON parsers WRT to BOM support in three major browsers.  The tests directly
> invoked the built-in JSON.parse functions and directly passed to them a
> source strings that was explicitly constructed to contain a BOM code point .
> This was done to ensure that the all transport layers  (and any transcodings
> they might perform) were bypassed and that we were actually testing the real
> built-in JSON parse functions.

It would be surprising if JSON.parse() accepted a BOM, since it
doesn't take bytes as input.

However, XHR's responseType = "json" exercises browsers in a way where
the input is bytes from the network. From the perspective of JSON
support in XHR,
http://lists.w3.org/Archives/Public/www-tag/2013Nov/0149.html (which
didn't reach the es-discuss part of this thread previously) applies.

-- 
Henri Sivonen
hsivonen@hsivonen.fi
http://hsivonen.fi/

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