- From: RFC Errata System <rfc-editor@rfc-editor.org>
- Date: Fri, 7 Oct 2016 13:30:52 -0700 (PDT)
- To: rousskov@measurement-factory.com, fielding@gbiv.com, julian.reschke@greenbytes.de
- Cc: aamelnikov@fastmail.fm, iesg@ietf.org, ietf-http-wg@w3.org, rfc-editor@rfc-editor.org
The following errata report has been verified for RFC7230,
"Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing".
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You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=7230&eid=4667
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Status: Verified
Type: Technical
Reported by: Alex Rousskov <rousskov@measurement-factory.com>
Date Reported: 2016-04-13
Verified by: Alexey Melnikov (IESG)
Section: 4.1.1
Original Text
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chunk-ext = *( ";" chunk-ext-name [ "=" chunk-ext-val ] )
Corrected Text
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chunk-ext = *( BWS ";" BWS chunk-ext-name
[ BWS "=" BWS chunk-ext-val ] )
Notes
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The infamous "implicit *LWS" syntax rule in RFC 2616 allowed whitespace between
";" and chunk-ext-name in chunk-ext. Some HTTP agents generate that whitespace.
In my experience, HTTP agents that can parse chunk extensions usually can handle
that whitespace. Moreover, ICAP, which generally relies on HTTP/1 for its message
syntax, uses that whitespace when defining the "ieof" chunk extension in RFC 3507
Section 4.5:
\r\n
0; ieof\r\n\r\n
IMHO, RFC 7230 should either allow BWS before chunk-ext-name or at the very least
explicitly document the HTTP/1 syntax change and its effect on parsers used for both
ICAP and HTTP/1 messages (a very common case for ICAP-supporting HTTP
intermediaries and ICAP services).
I also recommend adding BWS around "=", for consistency and RFC 2616 backward
compatibility reasons. HTTPbis RFCs already do that for transfer-parameter and
auth-param that have similar syntax.
Please also consider adding BWS _before_ ";" for consistency and RFC 2616 backward
compatibility reasons. HTTPbis RFCs already do that for transfer-extension,
accept-ext, t-ranking, and other constructs with similar syntax.
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RFC7230 (draft-ietf-httpbis-p1-messaging-26)
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Title : Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing
Publication Date : June 2014
Author(s) : R. Fielding, Ed., J. Reschke, Ed.
Category : PROPOSED STANDARD
Source : Hypertext Transfer Protocol Bis APP
Area : Applications
Stream : IETF
Verifying Party : IESG
Received on Friday, 7 October 2016 20:31:22 UTC