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HTTP header field syntax [WAS: Re: Prefer Draft Feedback]

From: Amos Jeffries <squid3@treenet.co.nz>
Date: Wed, 07 Dec 2011 15:45:34 +1300
To: <ietf-http-wg@w3.org>
Message-ID: <a26a8c4b7a19d1387cd8dcc528a24d07@treenet.co.nz>
 On Tue, 06 Dec 2011 19:46:47 +0100, Julian Reschke wrote:
> We're trying to find some structure in HTTP header field syntax, see
> <http://trac.tools.ietf.org/wg/httpbis/trac/wiki/HeaderFieldTypes> 
> for
> the work-in-progress.

 That list of ABNF is missing the pattern that could be called 
 "quoted-blob" or such. Things which appear superficially to have the 
 syntax of quoted-string but exclude the quoted-pair (or failed to spec 
 escaping entirely, with the same end result). ie the string portion may 
 contain bare \ characters which will break attempts to use a 
 quoted-string parser on it.

 Examples for this can be found in the new ETag ABNF from HTTPbis and 
 the path= parameter of Digest authentication. Possibly elsewhere I have 
 not run into yet.

Received on Wednesday, 7 December 2011 02:46:19 UTC

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