!Payload!
POST http://20mb.com/ HTTP/1.1[crlf]Host: www.host.com[crlf]Connection: Keep-Alive[crlf]User-Agent: [ua][crlf]Referer: 20mb.com[crlf]CONNECT [host_port] [protocol][crlf][crlf]HEAD http://20mb.com/ HTTP/1.1[crlf]20mb.com
User-Agent: Yes
Connection: close
Proxy-Connection: Keep-Alive...