AS3写FTP登录过程

1. var socket:Socket = new Socket("www.kelew.com",21)
2. socket.addEventListener(ProgressEvent.SOCKET_DATA,socketData)
3.  
4. function socketData(e:ProgressEvent):void
5. {
6. var d:String = socket.readUTFBytes(socket.bytesAvailable)
7. if (d.indexOf("ProFTPD")!=-1)
8. {
9. socket.writeUTFBytes("USER 用户名\n")
10. socket.writeUTFBytes("PASS 密码\n")
11. }else if(d.indexOf("User 用户名")!=-1)
12. {
13. socket.writeUTFBytes("help \n")
14. }
15. socket.flush()
16. }