将数据从 C# TCP 服务器发送到侦听线程外部的连接客户端

Question

我正在 Unity 中编写一个简单的 Tcp 服务器，并将我的 Flash 应用程序连接到它。我在网上找到了一个关于线程 Tcp 服务器的很棒的教程，我的 Flash 应用程序可以很好地连接到它。但是，我无法将侦听线程之外的数据发送到连接的客户端。我尝试创建在线程内部获得的 Tcpclient 的全局引用。但是，该引用（sclient）仅在侦听线程内部起作用，在线程外部打印 Null 到控制台。我必须采取一些措施来保留 TCP 客户端引用以供以后使用或从块线程外部访问它。请帮忙！

using UnityEngine;
using System.Collections;
using System;
using System.Text;
using System.Net.Sockets;
using System.Threading;
using System.Net;

public class TCPServer: MonoBehaviour
{
    private TcpListener tcpListener;
    private Thread listenThread;
    private TcpClient sclient;

    public float fireRate = 0.5F;
    private float nextFire = 0.0F;

public TCPServer()
{
    IPAddress localAddress = IPAddress.Parse("127.0.0.1");
    this.tcpListener = new TcpListener(localAddress, 9001);
    this.listenThread = new Thread(new ThreadStart(ListenForClients));
    this.listenThread.Start();
}

public void ListenForClients()
{
  this.tcpListener.Start();

  while (true)
{
    //blocks until a client has connected to the server
    sclient = this.tcpListener.AcceptTcpClient();

    print(sclient);//print "System.Net.Sockets.TcpClient" in console

    this.sMessage("Can you hear me now?");//this one works fine
}       
}

public void sMessage(String m){
    print(cStream); //print "Null" to console
    NetworkStream clientStream = sclient.GetStream();
    ASCIIEncoding encoder = new ASCIIEncoding();
    byte[] buffer = encoder.GetBytes(m);

    print("Received Connection from " + tcpClient.Client.RemoteEndPoint );
    print("Sending message..");
    print(clientStream.CanWrite);//returns true in console

    clientStream.Write(buffer, 0 , buffer.Length);
    clientStream.WriteByte (0);
    clientStream.Flush();
}

void Update() {
    if (Input.GetButton("Fire1") && Time.time > nextFire) {
        nextFire = Time.time + fireRate;
        this.sMessage("BOOM BOOM");//this one won't work. keep saying sclient is null
    }
}

Answer 1

调用Update的方法在哪里？

听起来当您调用它时还没有连接客户端。

Answer 2

一般来说，如果你避免socket、networkstream的同步方法，你应该使用xxxxAsync（socket有这样的方法）或BeginXXX方法。这可为您提供高性能和连接客户端数量。好的，现在关于同步...您应该为每个新连接的客户端创建新线程，并在该线程上启动会话处理。我建议您为连接的客户端创建一些会话类，并在该类中进行所有处理。

public class Your_Session
{
    private TcpClient m_pClient = null;

    public Your_Session(TcpClient client)
    {
        mpClient = client; // Assign client to mpClient
    }

    internal void Start(Object state)
    {
        // NOTE: call this Start method: 
        // ThreadPool.QueueUserWorkItem(new WaitCallback(session.Start));


        // Start your session processing here. This method is called from threapool thread. 
    }
}

只需在 ListenForClients 方法中调用 create session class instance(Your_Session session = new YourSession ...) 并调用 ThreadPool.QueueUserWorkItem(new WaitCallback(session.Start));开始会话处理。