Authentication response header 401

[Raphaël Flores]

Hi all, I'd like to make my application server sending a 401 HTTP status 
to client side for the client side user must enter his login/password.

Is it programmatically possible to directly modify HTTP Headers with 
CXF, or is there something already made for that ? If yes, could one 
guide me to resources please.

Thanks

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Raphael F.