[Unity Socket]在Unity中如何实现异步Socket通信技术

/// <summary>
/// Client Script.
/// Created By 蓝鸥3G 2014.08.23
/// </summary>

using UnityEngine;
using System.Collections;

public class ClientScript: MonoBehaviour {
    string msg = "";
    // Use this for initialization

    LOSocket client;
    void Start () {
        client = LOSocket.GetSocket(LOSocket.LOSocketType.CLIENT);
        client.InitClient ("127.0.0.1", 2222, ((string content) => {
            //收到服务器的回馈信息
        }));
    }

    void OnGUI() {
        msg = GUI.TextField(new Rect(0, 0, 500, 40), msg);
        if(GUI.Button(new Rect(0, 50, 100, 30), "Send"))
        {

            client.SendMessage (msg);
        }
    }
} 

/// <summary>
/// Server Script.
/// Created By 蓝鸥3G 2014.08.23
/// </summary>
/// 
/// 
using UnityEngine;
using System.Collections;

public class ServerScript : MonoBehaviour {

    private string receive_str;
    LOSocket server;
    // Use this for initialization
    void Start () 
    {
        server = LOSocket.GetSocket(LOSocket.LOSocketType.SERVER);
        //初始化服务器
        server.InitServer((string content) => {
            receive_str = content;
        });
    }

    void OnGUI()
    {
        if (receive_str != null) 
        {
            GUILayout.Label (receive_str);
        }
    }
}

/// <summary>
/// LOSocket.
/// Created By 蓝鸥3G 2014.08.23
/// </summary>
/// 
/// 
using UnityEngine;
using System.Collections;
using System.Net;
using System.Net.Sockets;
using System.Text;

//收到消息后的委托回调
public delegate void ReceiveCallBack(string content);

public class LOSocket{

    //可以创建的Socket端口类型
    public enum LOSocketType 
    {
        CLIENT = 0,
        SERVER = 1,
    }
    #region --------取消构造器
    private LOSocket()
    {
    }
        
    #endregion
    
    #region --------公共代码
    //通过静态方法获取不同的端口类型
    public static LOSocket GetSocket(LOSocket.LOSocketType type)
    {
        LOSocket socket = null;


        switch (type) {
        case LOSocketType.CLIENT:
            {
                //创建一个新的客户端
                socket = new LOSocket ();
                break;
            }
        case LOSocketType.SERVER:
            {
                //获取服务端
                socket = GetServer ();
                break;
            }
        }

        return socket;
    }

    #endregion
    #region --------客户端部分代码
    private Socket clientSocket;

    //声明客户端收到服务端返回消息后的回调委托函数
    private ReceiveCallBack clientReceiveCallBack;
    //用来存储服务端返回的消息数据
    byte[] Buffer = new byte[1024];

    //初始化客户端Socket信息
    public void InitClient(string ip,int port,ReceiveCallBack ccb)
    {
        this.clientReceiveCallBack = ccb;
        this.clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        IPAddress address = IPAddress.Parse (ip);
        IPEndPoint ep = new IPEndPoint (address, port);

        this.clientSocket.Connect(ep);
        //开始异步等待接收服务端消息
        this.clientSocket.BeginReceive (Buffer, 0, Buffer.Length, SocketFlags.None, new System.AsyncCallback(ReceiveFromServer), this.clientSocket);
    }

    //收到服务端返回消息后的回调函数
    void ReceiveFromServer(System.IAsyncResult ar)
    {
        //获取当前正在工作的Socket对象
        Socket worker = ar.AsyncState as Socket;
        int ByteRead=0;
        try
        {
            //接收完毕消息后的字节数
            ByteRead = worker.EndReceive(ar);
        }
        catch (System.Exception ex)
        {
            this.clientReceiveCallBack (ex.ToString ());
        }
        if (ByteRead > 0)
        {
            string Content = Encoding.Default.GetString (Buffer);
            //通过回调函数将消息返回给调用者
            this.clientReceiveCallBack (Content);
        }
        //继续异步等待接受服务器的返回消息
        worker.BeginReceive(Buffer, 0, Buffer.Length, SocketFlags.None, new System.AsyncCallback(ReceiveFromServer), worker);
    }

    //客户端主动发送消息
    public void SendMessage(string message)
    {
        if (message == null)
            return;

        message += "\r\n";
        byte[] sendData = Encoding.UTF8.GetBytes (message);

        //异步发送消息请求
        clientSocket.BeginSend (sendData, 0, sendData.Length, SocketFlags.None, new System.AsyncCallback (SendToServer), clientSocket);
    }
    //发送消息结束的回调函数
    void SendToServer(System.IAsyncResult ar)
    {
        Socket worker = ar.AsyncState as Socket;
        worker.EndSend (ar);
    }

    #endregion


    #region -------服务器部分代码
    //服务器端收到消息的存储空间
    byte[] ReceiveBuffer = new byte[1024];
    //服务器收到消息后的回调委托
    private ReceiveCallBack callback;

    //单例模式  
    private static LOSocket serverSocket;  
    private static LOSocket GetServer() {  
        if (serverSocket == null) {  
            serverSocket = new LOSocket();  
        }  
        return serverSocket;  
    }  

    //初始化服务器信息
    public void InitServer(ReceiveCallBack cb) {
        this.callback = cb;
        // 1.
        Socket server_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        // 2.
        IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, 2222);
        // 3.
        server_socket.Bind(endPoint);
        // 4.
        server_socket.Listen(10);
        // 5.开始异步等待客户端的请求链接
        server_socket.BeginAccept (new System.AsyncCallback (Accept), server_socket);

        this.callback ("开启服务器" + endPoint.ToString());
    }

    //接受到客户端的链接请求后的回调函数
    void Accept(System.IAsyncResult ar){
        //获取正在工作的Socket对象 
        Socket socket = ar.AsyncState as Socket;  
        //存储异步操作的信息，以及用户自定义的数据  
        Socket worker = socket.EndAccept(ar);  

        SocketError error;

        //开始异步接收客户端发送消息内容
        worker.BeginReceive (ReceiveBuffer, 0, ReceiveBuffer.Length, SocketFlags.None, new System.AsyncCallback (Receive), worker);
        //继续异步等待新的客户端链接请求
        socket.BeginAccept(new System.AsyncCallback(Accept), socket);  

    }
    //服务端收到客户端的消息后的回调函数
    void Receive(System.IAsyncResult ar)
    {
        //获取正在工作的Socket对象
        Socket worker = ar.AsyncState as Socket;
        int ByteRead=0;
        try
        {
            ByteRead = worker.EndReceive(ar);
        }
        catch (System.Exception ex)
        {
            this.callback (ex.ToString ());
        }
        if (ByteRead > 0)
        {
            string Content = Encoding.Default.GetString (ReceiveBuffer);
            this.callback (Content);
        }
        //继续异步等待客户端的发送消息请求
        worker.BeginReceive(ReceiveBuffer, 0, ReceiveBuffer.Length, SocketFlags.None, new System.AsyncCallback(Receive), worker);
    }
    #endregion
}