2020-09-30Socket 一個伺服器監聽多個客戶端 功能實現

山間UE4發表於2020-09-30

多個Socket通訊客戶端,具體的是伺服器在window系統下c#開發,實現互動通訊。Socket通訊伺服器啟動時,Socket將偵聽到的Socket連線傳給接受Socket,然後由接受Socket完成接受、傳送訊息,當Socket存在異常時,斷開連線。

1、伺服器一直監聽當前客戶端是否有連線

2、動態的保留當前有連線狀態的客戶端

3、伺服器端和客戶端進行互動資料

主函式

       public void StartListenUp()
        {
            IPAddress myIP = GetIPAddress();
            IPEndPoint localEndPoint = new IPEndPoint(myIP, _port);
            Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            try
            {
                listener.Bind(localEndPoint);
                listener.Listen(10);
                string userIP;

                while (true)
                {
                    Socket newClient = listener.Accept();
                    userIP = ((IPEndPoint)newClient.RemoteEndPoint).Address.ToString();
                    _transmit_IP.Add(userIP, newClient);
 
                    Thread clientThread = new Thread(new ParameterizedThreadStart(ThreadFun));
                    clientThread.Start(userIP);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }
        }

/// 執行緒執行體,訊息傳遞給執行緒執行體的使用者名稱,用以與使用者通訊
        private void ThreadFun(object obj)
        {
            //通過轉發表得到當前使用者套接字
            Socket handler = _transmit_IP[obj] as Socket;

          // 業務處理

       }

以上是伺服器的主要程式碼並已經和客戶端測試通過

希望大家批評指正。。。

ps:聽人勸吃飽飯,檢視了微軟最新非同步通訊的例子除錯了下

程式碼如下:

 public static void StartListening()
    {
        // Data buffer for incoming data.
        byte[] bytes = new Byte[1024];

        // Establish the local endpoint for the socket.
        // The DNS name of the computer
        // running the listener is "host.contoso.com".
        IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
        IPAddress ipAddress = ipHostInfo.AddressList[0];
        IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);

        // Create a TCP/IP socket.
        Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        // Bind the socket to the local endpoint and listen for incoming connections.
        try
        {
            listener.Bind(localEndPoint);
            listener.Listen(100);

            while (true)
            {
                // Set the event to nonsignaled state.
                allDone.Reset();

                // Start an asynchronous socket to listen for connections.
                Console.WriteLine("Waiting for a connection...");
                listener.BeginAccept(new AsyncCallback(AcceptCallback), listener);

                // Wait until a connection is made before continuing.
                allDone.WaitOne();
            }
        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
        Console.WriteLine("\nPress ENTER to continue...");
        Console.Read();
    }

    public static void AcceptCallback(IAsyncResult ar)
    {
        // Signal the main thread to continue.
        allDone.Set();

        // Get the socket that handles the client request.
        Socket listener = (Socket)ar.AsyncState;
        Socket handler = listener.EndAccept(ar);

        // Create the state object.
        StateObject state = new StateObject();
        state.workSocket = handler;
        handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
    }

    public static void ReadCallback(IAsyncResult ar)
    {
        String content = String.Empty;

        // Retrieve the state object and the handler socket from the asynchronous state object.
        StateObject state = (StateObject)ar.AsyncState;
        Socket handler = state.workSocket;

        // Read data from the client socket.
        int bytesRead = handler.EndReceive(ar);

        if (bytesRead > 0)
        {
            // There  might be more data, so store the data received so far.
            state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));

            // Check for end-of-file tag. If it is not there, read more data.
            content = state.sb.ToString();
            if (content.IndexOf("<EOF>") > -1)
            {
                // All the data has been read from the client. Display it on the console.
                Console.WriteLine("Read {0} bytes from socket. \n Data : {1}", content.Length, content);
                // Echo the data back to the client.
                Send(handler, content);
            }
            else
            {
                // Not all data received. Get more.
                handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
            }
        }
    }

    private static void Send(Socket handler, String data)
    {
        // Convert the string data to byte data using ASCII encoding.
        byte[] byteData = Encoding.ASCII.GetBytes(data);

        // Begin sending the data to the remote device.
        handler.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), handler);
    }

    private static void SendCallback(IAsyncResult ar)
    {
        try
        {
            // Retrieve the socket from the state object.
            Socket handler = (Socket)ar.AsyncState;

            // Complete sending the data to the remote device.
            int bytesSent = handler.EndSend(ar);
            Console.WriteLine("Sent {0} bytes to client.", bytesSent);

            handler.Shutdown(SocketShutdown.Both);
            handler.Close();

        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
    }

作者:江南煙雨居

出處:http://www.cnblogs.com/newstart//

本文版權歸作者和部落格園共有,歡迎轉載,但未經作者同意必須保留此段宣告,且在文章頁面明顯位置給出原文連線,否則保留追究法律責任的權利。

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