Hi folks:
I have some doubt about whether a UAS which is not a server(such as a
handphone) will return 420 Bad Extension when it doesn't support the extension
specified in Require header.
As 21.4.15 said:
The server did not understand the protocol extension specified in a
Proxy-Require (Section 20.29) or Require (Section 20.32) header
field. The server MUST include a list of the unsupported extensions
in an Unsupported header field in the response. UAC processing of
this response is described in Section 8.1.3.5.
So if not, which response should be returned?
Regards,
Ma Ji
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