Re: [Json] secdir review of draft-ietf-jsonbis-rfc7159bis-03
Julian Reschke <julian.reschke@gmx.de> Thu, 16 March 2017 11:35 UTC
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To: Peter Cordell <petejson@codalogic.com>, John Cowan <cowan@ccil.org>, Carsten Bormann <cabo@tzi.org>
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Cc: draft-ietf-jsonbis-rfc7159bis.all@ietf.org, secdir@ietf.org, "json@ietf.org" <json@ietf.org>
From: Julian Reschke <julian.reschke@gmx.de>
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Date: Thu, 16 Mar 2017 12:35:39 +0100
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Subject: Re: [Json] secdir review of draft-ietf-jsonbis-rfc7159bis-03
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On 2017-03-16 12:23, Peter Cordell wrote: > On 16/03/2017 10:49, Julian Reschke wrote: >> On 2017-03-16 11:28, Peter Cordell wrote: >>> >>> 8.1. Character Encoding >>> >>> JSON text SHOULD be encoded in UTF-8 [UNICODE] (Section 3). JSON >>> texts that are encoded in UTF-8 are interoperable in the sense that >>> they will be read successfully by the maximum number of >>> implementations. >>> >>> There are many implementations that cannot successfully read texts >>> in other encodings. JSON text MAY be encoded in other encodings if >>> the generator is sure that the intended parsers can read them. >>> >>> Implementations MUST NOT add a byte order mark to the beginning of a >>> JSON text. In the interests of interoperability, implementations >>> that parse JSON texts MAY ignore the presence of a byte order mark >>> rather than treating it as an error. >>> >>> Are "generator" and "parser" the correct terms to use in this instance, >>> or does that functionality sit above the character encoding layer? >>> ... >> >> Not convinced. >> >> a) It's not constrained to UTF-8/16/32, so people might decide to >> support ISO-8859-1, or UTF-7- > > Why is that a problem if the generator knows the parser can read it? If > someone wants to use EBCDIC for whatever reason, are they not allowed to > call it JSON? For application/json, it would violate a SHOULD-level requirement... <https://greenbytes.de/tech/webdav/rfc7159.html#rfc.section.8.1.p.1>: "JSON text SHALL be encoded in UTF-8, UTF-16, or UTF-32. The default encoding is UTF-8, and JSON texts that are encoded in UTF-8 are interoperable in the sense that they will be read successfully by the maximum number of implementations; there are many implementations that cannot successfully read texts in other encodings (such as UTF-16 and UTF-32)." So I agree it's technically allowed. >> b) It doesn't state that the only way to support encodings other than >> UTF-8 is to inspect the leading octets for zeros (or their lack of). > > UTF detection is one way. It's not the only way. If you want to go the > UTF detection way or some other way, rfc7159bis shouldn't prevent it, > but it doesn't have to tell you how to do it. Oh, it's not the only way? How do we interoperate then? Best regards, Julian
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Carsten Bormann
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Benjamin Kaduk
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… John Cowan
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Ned Freed
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… John Cowan
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Peter Cordell
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Carsten Bormann
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Ned Freed
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Carsten Bormann
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Elwyn Davies
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Martin J. Dürst
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Carsten Bormann
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Stefan Hagen
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Stefan Hagen
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Peter Cordell
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Matthew A. Miller
- Re: [Json] [secdir] secdir review of draft-ietf-j… Nico Williams
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Carsten Bormann
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Carsten Bormann
- Re: [Json] [secdir] secdir review of draft-ietf-j… Nico Williams
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… John Cowan
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Peter Cordell
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Peter Cordell
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Alexey Melnikov
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Peter Cordell
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Matthew A. Miller
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… John Cowan
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Matthew A. Miller
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Matthew A. Miller
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Julian Reschke
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Nico Williams
- Re: [Json] secdir review of draft-ietf-jsonbis-rf… Peter Cordell