.NET 端口监听

  static void Main(string[] args)
        {
            try
            {
                IPAddress ip = new IPAddress(new byte[] { 127, 0, 0, 1 });
                //在3721端口新建一个TcpListener对象
                TcpListener listener = new TcpListener(ip, 3721); 
                listener.Start();
                Console.WriteLine("started listening..");
                //开始监听
                while (true)
                {
                    Socket s = listener.AcceptSocket();
                    string remote = s.RemoteEndPoint.ToString();
                    //允许js跨越访问
                    var bytes = System.Text.Encoding.UTF8.GetBytes("HTTP/1.1 200 OK\r\nAccess-Control-Allow-Origin: * \r\n\r\nOK");
                    s.Send(bytes);
                    s.Shutdown(SocketShutdown.Send);
                }
            }
            catch (System.Security.SecurityException)
            {
                Console.WriteLine("firewall says no no to application – application cries..");
            }
            catch (Exception)
            {
                Console.WriteLine("stoped listening..");
            }
        }