C＃套接字剛收到第一條消息

Question

我搜索了許多示例和教程，但沒有搜索過，但是我一生都無法弄清楚我在這里做錯了什么...如果我向該服務器發送了幾條消息，我只會在Console.Writeline命令中打印第一個消息，並且其余的從未打印過...我一定是在做一些根本性的錯誤，但是我真的找不到它...：S

這是服務器代碼：

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms.VisualStyles;

namespace HL7_Manager
{
public class MonitorServer
{
    private int _port;
    private Socket _serverSocket;
    private List<ClientObject> _clients;

    public bool IsConnected { get; set; }
    public MonitorServer(int port)
    {
        _port = port;
        _clients = new List<ClientObject>();
    }

    public void StartListening()
    {
        _serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        Thread listenThread = new Thread(new ThreadStart(ListenerThread));
        listenThread.IsBackground = true;
        listenThread.Start();
    }

    public void StopListening()
    {
        IsConnected = true;
        _serverSocket.Close();
        while (_clients.Count > 0)
        {
            _clients[0].KeepProcessing = false;
            _clients[0].ClientSocket.Close();
            _clients.RemoveAt(0);
        }
    }

    private void ListenerThread()
    {
        _serverSocket.Bind(new IPEndPoint(IPAddress.Any, _port));
        _serverSocket.Listen(100);

        Console.WriteLine("Listening on port 8000");

        while (true)
        {
            Socket clientSocket = _serverSocket.Accept();
            ClientObject client = new ClientObject();
            client.KeepProcessing = true;
            client.ClientSocket = clientSocket;
            _clients.Add(client);
            ParameterizedThreadStart ptStart = new ParameterizedThreadStart(ProcessClientThread);
            Thread processThread = new Thread(ptStart);
            processThread.IsBackground = true;
            processThread.Start(client);
            clientSocket = null;
            client = null;
        }
    }

    private void ProcessClientThread(object clientObj)
    {
        Console.WriteLine("Client connected");
        ClientObject client = (ClientObject) clientObj;
        Socket clientSocket = client.ClientSocket;
        byte[] buffer = new byte[clientSocket.ReceiveBufferSize];
        int receiveCount = 0;

        while (client.KeepProcessing)
        {
            try
            {
                receiveCount = clientSocket.Receive(buffer, 0, buffer.Length, SocketFlags.None);
                Console.WriteLine(Encoding.ASCII.GetString(buffer));
            }
            catch (Exception ex)
            {
                if (!client.KeepProcessing)
                    return;
                Console.WriteLine(ex.Message);
            }
        }
        clientSocket.Close();
        _clients.Remove(client);
    }
}
}

Answer 1

這是您絕對應該更改的方法以及更改方法。

    private void ProcessClientThread(object clientObj)
    {
        Console.WriteLine("Client connected");
        ClientObject client = (ClientObject)clientObj;
        Socket clientSocket = client.ClientSocket;
        byte[] buffer = new byte[clientSocket.ReceiveBufferSize];
        int receiveCount = 0;

        while (client.KeepProcessing)
        {
            try
            {
                receiveCount = clientSocket.Receive(buffer, 0, buffer.Length, SocketFlags.None);
                if (receiveCount == 0)
                    break; //the client has closed the stream
                var ret = Encoding.ASCII.GetString(buffer, 0, receiveCount);
                Console.WriteLine(ret);
            }
            catch (Exception ex)
            {
                if (!client.KeepProcessing)
                    return;
                Console.WriteLine(ex.Message);
            }
        }
        clientSocket.Close();
        _clients.Remove(client);
    }

Answer 2

檢查您實際收到了多少個字節。 TCP是一種流協議，這意味着如果您的客戶端一次接一個地發送幾次小消息，您將在接收器處一次性接收它們。 如果您的接收緩沖區中碰巧有一個空字符，您可能會認為您沒有收到所有這些字符串，但實際上您確實收到了。 通過檢查您收到了多少字節並檢查緩沖區內容來進行檢查。 如果您犯了此錯誤，則代碼中可能存在更深層的問題。 TCP流式傳輸的事實使其變得更加復雜