ietf-nntp Draft summary of IETF 48 meeting
Charles Lindsey
chl at clw.cs.man.ac.uk
Tue Aug 15 02:10:55 PDT 2000
In <ylhf8nldyp.fsf at windlord.stanford.edu> Russ Allbery <rra at stanford.edu> writes:
>Andrew Gierth <andrew at erlenstar.demon.co.uk> writes:
>> With overview-based implementations, the CRLF will have been collapsed
>> to a space before the comparison happens.
>Good point. Hm. That means that potentially there are different
>semantics for matching against non-overview headers than matching against
>overview headers. That would be bad; maybe we need to require a
>canonicalization of the headers be applied before the match is attempted?
>That would actually make the INN behavior make a lot more sense.
Yes, I think you word it as a canonicalisation of the header before
matching. All whitespace (including folds and the nbsp character) is
collapsed to a single SP, and then you match. The only thing in the
wildmat that matches a SP is '?' or '*' or, in PAT, the gap between
wildmats. It seems close enough to what INN does (does INN collapse folds,
too?) and close enough to what XPAT seems to be trying to do.
--
Charles H. Lindsey ---------At Home, doing my own thing------------------------
Email: chl at clw.cs.man.ac.uk Web: http://www.cs.man.ac.uk/~chl
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