I got it, that is:

HTTP/1.1 200 OK
Pragma: no-cache
Pragma: no-cache
Server: Apache/1.3.26 (Unix) Debian GNU/Linux
Content-Type: text/html
Expires: 0
Client-Date:17 Sep 2005.....
Client-Peer:xxxxxxxxxxx
Client-Response-Num: 1
Title:xxxxxxxxx
[download]

Is there any thing wrong so I can't do redirection?