- From: Jeffrey Mogul <mogul@pa.dec.com>
- Date: Thu, 06 Jun 96 15:33:57 MDT
- To: Anselm Baird-Smith <abaird@w3.org>
- Cc: http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com, jg@w3.org
The comment first: is there any reasons why the 'Warning' header is
not stated in any of the {general,request,reply,entity}-headers
(resp. sections 4.5, 5.3, 6.2 and 7.1). I think it's the only missing
from the above lists (as far as I can tell), and I was wondering if
there was some purpose behind this ?
Probably an oversight. It looks like it should be a response-header
(section 6.2).
The question: reading section 14.45 (and particularly the BNF), it is
unclear to me that I am allowed to fold multiple Warning headers
together (despite the text in section 2.2: "HTTP/1.1 headers can be
folded onto multiple lines if the continuation line begins with a
space or horizontal tab").
First of all, I think the folding rule in 2.2 applies to the
representation of a single header, not to the combination of
two different ones.
You probably should have quoted this from section 4.2:
It MUST be
possible to combine the multiple header fields into one "field-name:
field-value" pair, without changing the semantics of the message, by
appending each subsequent field-value to the first, each separated by a
comma.
This suggests that the BNF for Warning is indeed subtly wrong. It
now is
Warning = "Warning" ":" warn-code SP warn-agent SP warn-text
warn-code = 2DIGIT
warn-agent = ( host [ ":" port ] ) | pseudonym
; the name or pseudonym of the server adding
; the Warning header, for use in debugging
warn-text = quoted-string
and I guess it should be
Warning = "Warning" ":" 1#warning-value
warning-value = warn-code SP warn-agent SP warn-text
warn-code = 2DIGIT
warn-agent = ( host [ ":" port ] ) | pseudonym
; the name or pseudonym of the server adding
; the Warning header, for use in debugging
warn-text = quoted-string
-Jeff
Received on Thursday, 6 June 1996 15:50:13 UTC