Re: WGLC p1: MUST fix Content-Length?

[Alex Rousskov <[e-mail]>]

On 05/01/2013 01:22 AM, Willy Tarreau wrote:
> On Tue, Apr 30, 2013 at 11:53:28PM -0600, Alex Rousskov wrote:
>> Hello,
>>
>>     When talking about a Content-Length header field with multiple
>> identical values, Part 1 Section 3.3.2 of HTTPbis says:
>>
>>> the recipient MUST either reject the message as invalid or
>>> replace the duplicated field-values with a single valid
>>> Content-Length field containing that decimal value prior to
>>> determining the message body length.
>>
>> It is not clear whether "recipient MUST replace" (a requirement on the
>> recipient) also implies that "a sender MUST replace [...] when
>> forwarding the message" (a requirement on the sender). This issue has
>> been raised on 2011/11/28, but the discussion diverged, and I could not
>> tell whether there was a consensus on what the correct interpretation is.
>>
>> Please decide whether a proxy MUST "fix" such Content-Length headers
>> when forwarding the message and adjust the above text to clarify one way
>> or another.
> 
> That's what the discussion converged to. I even modified haproxy in order
> to do so. The idea is simple : if you receive a message with multiple
> content lengths, either you can't deal with them and must reject the
> message, or you can deal with them and then you know how to fix the
> message before interpreting it or forwarding it, so you must do so.
> 
> Do you think the text needs to be adjusted ?

Yes, of course. The current text is not clear IMO, as I tried to explain
in the beginning of this message.


Cheers,

Alex.