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RFC 7230, "Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing", June 2014

Source of RFC: httpbis (app)

Errata ID: 4412
Status: Rejected
Type: Technical

Reported By: Rick Taylor
Date Reported: 2015-07-09
Rejected by: Barry Leiba
Date Rejected: 2015-07-09

Section 3.3.3 says:

If a Transfer-Encoding header field is present in a response and
the chunked transfer coding is not the final encoding, the
message body length is determined by reading the connection until
it is closed by the server.  If a Transfer-Encoding header field
is present in a request and the chunked transfer coding is not
the final encoding, the message body length cannot be determined
reliably; the server MUST respond with the 400 (Bad Request)
status code and then close the connection.

It should say:

Either:

If a Transfer-Encoding header field is present in a response and
the chunked transfer coding is not the final encoding, the
message body length is determined by reading the connection until
it is closed by the server.

Or:

If a Transfer-Encoding header field is present in a request and 
the chunked transfer coding is not the final encoding, the 
message body length cannot be determined 
reliably; the server MUST respond with the 400 (Bad Request) 
status code and then close the connection.

Notes:

The paragraph has two apparently contradictory rules. It is unclear which is the correct behaviour.
--VERIFIER NOTES--
They're not contradictory: the first is for responses and the second is for requests, which are different situations.

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