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From Julian Reschke <>
Subject Re: RFC 7230..7235 Parsing Conformance?
Date Tue, 17 May 2016 18:00:42 GMT
On 2016-05-17 19:01, Graham Leggett wrote:
> On 17 May 2016, at 6:43 PM, William A Rowe Jr <> wrote:
>> Wondering what other contributors are thinking on this topic.
>> We have a number of changes in the ABNF grammar between
>> RFC2616 and RFC7230..7235. Do we want trunk 2.6/3.0 to be
>> an entirely RFC723x generation server, and drop all support for
>> RFC2616?
>> Do we want to backport these changes to 2.4.x? If so, what
>> mechanism do we want to toggle the behavior of the server
>> between 2616 and 7230..7235?
>> We can presume a small performance hit in any conditional
>> operation, especially when those decisions apply to tight parsing
>> loop. Toggling between two different parser implementations would
>> probably be a bit more efficient than conditionals within a parser
>> itself.
> Can you give some examples to get a sense of the extent of this?
> Regards,
> Graham

+1 to the question; I'd like to see examples as well...

I believe we only changed the ABNF when we came to the conclusion that 
the old one was incorrect, or did not reflect what implementations do in 

Best regards, Julian

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