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

 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.


 AYJ