Question

当我的Android客户端连接到服务器（用C＃编写）时，服务器将收到一系列'\ 0'。即使我关闭Android应用程序或断开手机，服务器仍会收到此数据。

我使用C＃客户端测试了我的服务器，服务器上没有问题。

这是我在C＃中的服务器代码：

private void listen_Btn_Click(object sender, EventArgs e)
{
    try
    {
        _socket = new Socket(AddressFamily.InterNetwork,
                                  SocketType.Stream,
                                  ProtocolType.Tcp);
        IPEndPoint ipLocal = new IPEndPoint(IPAddress.Any, port);
        // Bind to local IP Address...
        _socket.Bind(ipLocal);
        // Start listening...
        _socket.Listen(4);
        // Create the call back for any client connections...
        _socket.BeginAccept(new AsyncCallback(OnClientConnect), null);
    }
    catch (Exception ee)
    {
        MessageBox.Show(ee.Message);
    }

}

// This is the call back function, which will be invoked when a client is connected
public void OnClientConnect(IAsyncResult asyn)
{
    try
    {
        Socket workerSocket = _socket.EndAccept(asyn);
        _socket.BeginAccept(new AsyncCallback(OnClientConnect), null);
        Interlocked.Increment(ref m_clientCount);
        m_workerSocketList.Add(workerSocket);
        clientsName.Add("$unknown$");
        if (listBox1.InvokeRequired)
        {
            listBox1.Invoke(new MethodInvoker(delegate { listBox1.Items.Clear(); foreach (string name in clientsName) listBox1.Items.Add(name); }));
        }
        ArrayList rthreadParams = new ArrayList();
        rthreadParams.Add(workerSocket);
        rthreadParams.Add(m_clientCount);
        Thread rThread = new Thread(new ParameterizedThreadStart(WaitForData));
        rThread.Start(rthreadParams);
        rThread.Join();

    }
    catch (ObjectDisposedException)
    {
        System.Diagnostics.Debugger.Log(0, "1", "\n OnClientConnection: Socket has been closed\n");
    }
    catch (SocketException se)
    {
        MessageBox.Show(se.Message);
    }
}

public class SocketPacket
{
    public Socket m_currentSocket;
    public int m_clientNumber;
    public SocketPacket(Socket socket, int clientNumber)
    {
        m_currentSocket = socket;
        m_clientNumber = clientNumber;
    }
    public byte[] dataBuffer = new byte[1024];
}
public void WaitForData(object param)
{
    try
    {
        Socket soc = (Socket)((ArrayList)param)[0];
        int clientNumber = (int)((ArrayList)param)[1];
        if (pfnWorkerCallBack == null)
        {
            pfnWorkerCallBack = new AsyncCallback(OnDataReceived);
        }
        SocketPacket theSocPkt = new SocketPacket(soc, clientNumber);

        soc.BeginReceive(theSocPkt.dataBuffer, 0, theSocPkt.dataBuffer.Length,
                         SocketFlags.None, pfnWorkerCallBack, theSocPkt);
    }
    catch (SocketException se)
    {
        MessageBox.Show(se.Message);
    }
}
public void OnDataReceived(IAsyncResult asyn)
{
    SocketPacket socketData = (SocketPacket)asyn.AsyncState;
    try
    {
        int iRx = socketData.m_currentSocket.EndReceive(asyn);
        char[] chars = new char[iRx + 1];
        System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
        d.GetChars(socketData.dataBuffer, 0, iRx, chars, 0);
        String szData = new String(chars);
        szData = szData.Replace("\0", "");

        // doing some work with szData

        ArrayList t_Params = new ArrayList();
        t_Params.Add(socketData.m_currentSocket);
        t_Params.Add(socketData.m_clientNumber);
        WaitForData(t_Params);

    }
    catch (Exception ee)
    {

    }
}

这是Android客户端代码：

    try
    {
        InetSocketAddress sa = new InetSocketAddress("192.168.50.11", 2001);
        Socket socket = new Socket();
        socket.connect(sa,4000);


        OutputStream dos = socket.getOutputStream();
        PrintWriter out = new PrintWriter(dos);
        out.write("hello");
        out.flush();
        out.close();
        socket.close();
    }
    catch (Exception e)
    {
        Log.d(appTag, e.toString());
    }

我该如何解决这个问题？

Answer 1

我使用以下代码在python中创建了另一个客户端：

import socket
s = socket.socket(socket.AF_INET,socket.SOC_STREAM)
s.connect(("127.0.0.1",2001))
s.send("hello!")

并且在服务器中没有这样的问题。只有当我在android中创建一个套接字时，才会出现这个问题。

问题在哪里？

TCP套接字不会停止从Android客户端接收数据，获得一系列'\ 0'

1 个答案: