http://dev.youkuaiyun.com/article/16/16233.shtm
http://blog.youkuaiyun.com/pansiom/archive/2006/01/01/568096.aspx
http://community.youkuaiyun.com/Expert/FAQ/FAQ_Index.asp?id=161814
http://community.youkuaiyun.com/Expert/FAQ/FAQ_Index.asp?id=166886
http://community.youkuaiyun.com/Expert/FAQ/FAQ_Index.asp?id=114312