http 传输文件 如下
HTTP/1.1 200 OK
Server: 360Server
Date: Thu, 07 Nov 2013 06:31:31 GMT
Content-Type: application/octet-stream
Connection: keep-alive
X-Powered-By: PHP/5.2.5
Accept-Ranges: bytes
Content-Length: 2144
Content-Transfer-Encoding: binary
SIP: 220.181.131.14
//后面是数据了
Content-Transfer-Encoding: binary