Java利用MSNP协议登录MSN

请参见上一篇文章，登录MSN协议
具体Java实现:
命令序列：<<代表发送,>>代表结果
1.连接DS(Dispatcher Server)，得到NS(Notification Server)
<<VER 1 MSNP18 CVR0
>>VER 1 MSNP18
<<CVR 2 0x0804 winnt 5.1 i386 MSNMSGR 14.0.8089.0726 msmsgs yourAccount
>>CVR 2 14.0.8089 14.0.8089 14.0.8089 http://msgruser.dlservice.microsoft.com/download/0/9/7/0974F7CD-D082-46FE-922D-806670345793/zh-chs/wlsetup-cvr.exe http://download.live.com/?sku=messenger
<<USR 3 SSO I yourAccount
>>XFR 3 NS 207.46.124.86:1863 U D
private String dsHost = "64.4.9.254";//ds host
private String nsHost;//ns host
private int port = 1863;//port
private int trId = 1;//命令序列号
private String ticketToken;//在获取联系人时用
//得到向MSN服务器发送的命令
private String getMSNCommand(String cmd, String ... args) {
StringBuilder sb = new StringBuilder();
sb.append(cmd).append(' ');
sb.append(trId++).append(' ');
for (int i = 0; i < args.length; i++) {
if (i < args.length - 1) {
sb.append(args[i]).append(' ');
} else {
sb.append(args[i]);
}
}
sb.append("\r\n");
return sb.toString();
}
//初始化NS地址
private void initNSHost() throws TelnetException {
NonBlockTelnetClient client = new NonBlockTelnetClient(dsHost, port);
client.connect();
String cmd = getMSNCommand("VER", "MSNP18", "CVR0");
client.sendCommand(cmd);
String resp = client.getOutputByLine();
System.out.println("resp=" + resp);
cmd = getMSNCommand("CVR", "0x0804", "winnt", "5.1", "i386", "MSNMSGR", "14.0.8089.0726", "msmsgs", username);
client.sendCommand(cmd);
resp = client.getOutputByLine();
System.out.println("resp=" + resp);
cmd = getMSNCommand("USR", "SSO", "I", username);
client.sendCommand(cmd);
resp = client.getOutput