bool connectServer()
{
System.Console.WriteLine("Please input server's address [and port].");
string address = System.Console.ReadLine();
int port = 4321;
if (address.Contains(":"))
{
port = int.Parse(address.Substring(address.IndexOf(':') + 1));
address = address.Substring(0, address.IndexOf(':') - 1);
}
client = new TcpClient(address, port);
// client.Connect(address,port);
if (client.Connected)
{
stream = client.GetStream();
status = clientStatus.CONNECTED;
// Thread t=new Thread(new ThreadStart(this.receiveEvent));
// t.Join();
receiveEvent();
return(true);
}
status = clientStatus.UN_CONNECTED;
return(false);
}
async void receiveEvent()
{
byte[] buf = new byte[MAX_BUF_SIZE];
//接收密钥
while (true)
{
if (stream.CanRead)
{
int count = stream.Read(buf, 0, MAX_BUF_SIZE);
string recv = System.Text.Encoding.ASCII.GetString(buf);
//密钥以明文形式发送
if (recv.Contains("KEY:"))
{
System.Console.WriteLine(recv);
key = Convert.FromBase64String(recv.Substring(4, 12));
// System.Console.WriteLine("Key: {0}",Convert.ToBase64String(key));
status = clientStatus.ENCRYPTED;
break;
}
else
{
stream.Write(System.Text.Encoding.ASCII.GetBytes("SEND KEY"), 0, System.Text.Encoding.ASCII.GetByteCount("SEND KEY"));
}
}
}
//接收消息循环
//在服务器端关闭时会报错退出
try
{
while (true)
{
string message = string.Empty;
// byte[] buf=new byte[MAX_BUF_SIZE];
if (status != clientStatus.ENCRYPTED)
{
return;
}
while (true)
{
int count = await stream.ReadAsync(buf, 0, MAX_BUF_SIZE);
message += System.Text.Encoding.ASCII.GetString(buf, 0, count);
if (count < MAX_BUF_SIZE)
{
break;
}
}
// System.Console.WriteLine("Phys Recv: {0}",message);
for (int i = 0; i < message.Length; i += 24)
{
string part = message.Substring(i, message.Length - i >= 24 ? 24 : message.Length - i);
DESCrypt crypt = new DESCrypt();
part = crypt.Decrypt(part, key);
System.Console.Write(part);
}
System.Console.WriteLine();
message.Remove(0);
}
}
catch (Exception ex)
{
System.Console.WriteLine(ex);
stream.Close();
client.Close();
Environment.Exit(-1);
}
}
//方法
chatClient()
{
status = clientStatus.UN_INITIALIZED;
}
