http://bugs.winehq.org/show_bug.cgi?id=20109
--- Comment #2 from knan-wine@anduin.net 2009-09-21 12:14:16 --- Synthesizes a fictive "HTTP/1.0 200 OK\r\n\r\n" minimal response header, looks like.
(wininet.dll from IE5)
No idea what it does to the response body, the app only looks at the headers.