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Re: [Json] Seeking more input on draft-ietf-json-text-sequence

"Manger, James" <James.H.Manger@team.telstra.com> Thu, 22 May 2014 05:21 UTC

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From: "Manger, James" <James.H.Manger@team.telstra.com>
To: Nico Williams <nico@cryptonector.com>, Paul Hoffman <paul.hoffman@vpnc.org>
Date: Thu, 22 May 2014 15:21:37 +1000
Thread-Topic: [Json] Seeking more input on draft-ietf-json-text-sequence
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Cc: IETF JSON WG <json@ietf.org>
Subject: Re: [Json] Seeking more input on draft-ietf-json-text-sequence
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>  JSON-sequence = *(JSON-text LF)

No, because that means a payload of, say, 2 newlines is invalid. It should be a valid sequence of 0 JSON items. It is too easy to get stray newlines to reject them.

>  JSON-sequence = *ws *(value text-sep *ws)
>  text-sep = *(SP / HTAB / CR) LF ; these are from RFC5234
>  ws = <given by RFC7159>
>  value = <given by RFC7159>

This still does not deal with greedy parsers as <value> includes leading and trailing optional whitespace for objects and arrays (but not for primitives).

Acceptable versions:

  JSON-sequence = *(JSON-text LF) ws
or
  JSON-sequence = ws *(JSON-text ws LF ws)

with
  ws = <given by RFC7159> ; optional whitespace
  JSON-text = <given by RFC7159>
  LF = <given by RFC5234> ; linefeed %x0A

--
James Manger

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