聊天服务申请

Question

我正在为游戏制作聊天服务，

我正在使用TCP侦听器作为帐户信息的客户端，某种登录服务。我想知道我是否可以保持连接到服务器的客户端，以检查他是否还在线，并且如果他有新消息则继续向他发送消息。

我已经尝试为登录队列创建一个套接字列表，但是一旦我接受了一个新的套接字，就会将前一个套接字断开连接到服务器。

byte[] usernameByte = new byte[100];
int usernameRecieved = s.Receive(usernameByte);
//guiController.setText(System.DateTime.Now + " Recieved Login...");

byte[] passByte = new byte[100];
int passRecieved = s.Receive(passByte);
//guiController.setText(System.DateTime.Now + " Recieved Password...");

string username = "";
string password = "";

for (int i = 0; i < usernameRecieved; i++)
     username += (Convert.ToChar(usernameByte[i]));

for (int i = 0; i < passRecieved; i++)
     password += (Convert.ToChar(passByte[i]));

if (DomainController.getInstance().checkAccount(username, password))
{
    ASCIIEncoding asen = new ASCIIEncoding();
    s.Send(asen.GetBytes("true"));
    s.Send(asen.GetBytes("U are succesfully logged in, press enter to continue"));
    guiController.setText(serverName,System.DateTime.Now+"");
    guiController.setText(serverName, "Sent Acknowledgement - Logged in");
}
else
{
    ASCIIEncoding asen = new ASCIIEncoding();
    s.Send(asen.GetBytes("false"));
    s.Send(asen.GetBytes("U are NOT logged in, press enter to continue"));
    guiController.setText(serverName, System.DateTime.Now + "");
    guiController.setText(serverName, "\nSent Acknowledgement - Not logged in");
}

这是我目前用来检查用户发送给我的帐户信息的代码。在我发送之后，用户放下连接，然后继续下一个。

我已经尝试制作一个单独的套接字列表并逐个处理它们，但是由于前一个套接字的连接丢失，即使是两个尝试连接的不同机器也失败了。

有没有人有解决方法/保存套接字的方法，我可以使用它来使程序保持所有连接存活？所以我可以从用户1发送消息给用户2，只需使用他们连接的插座？或者我是否需要在每次连接时添加ID？

修改

客户端代码:(这只是一个测试客户端）

while (true)
{
TcpClient tcpclnt = new TcpClient();
Console.WriteLine("Connecting.....");
tcpclnt.Connect("xx.xxx.xxx.xx", 26862);
// use the ipaddress as in the server program

while(!(checkResponse(tcpclnt.GetStream())))
{
     Thread.Sleep(1000);
}

Console.WriteLine("Connected");

Console.Write("Enter the string to be transmitted : ");

String str = Console.ReadLine();
if (str == "")
{
    str = " ";
}

Stream stm = tcpclnt.GetStream();

ASCIIEncoding asen = new ASCIIEncoding();
byte[] ba = asen.GetBytes(str);


Console.WriteLine("Transmitting.....");

stm.Write(ba, 0, ba.Length);

Console.Write("Enter the string to be transmitted : ");

String str2 = Console.ReadLine();
if (str2 == "")
{
   str2 = " ";
}

Stream stm2 = tcpclnt.GetStream();

ASCIIEncoding asen2 = new ASCIIEncoding();
byte[] ba2 = asen2.GetBytes(str2);


Console.WriteLine("Transmitting.....");

stm.Write(ba2, 0, ba2.Length);
if (str == "false")
{
    blijvenWerken = false;
}
byte[] bb = new byte[100];
int k = stm.Read(bb, 0, 100);

for (int i = 0; i < k; i++)
Console.Write(Convert.ToChar(bb[i]));

byte[] bb2 = new byte[100];
int k2 = stm.Read(bb2, 0, 100);
Console.Write("\n");
for (int i = 0; i < k2; i++)
Console.Write(Convert.ToChar(bb2[i]));

Console.WriteLine("\n");

tcpclnt.Close();
Thread.Sleep(1000);
}

服务器获取套接字： 这段代码在loginserver上，因为我每次只能接受1个套接字以保持连接活动，我将queueCount放在最大值为1。 我希望能够创建一个我接受添加到用户帐户的套接字列表。

while (loginServerOn)
{
    if (queueCount < 1)
    {
        if (loginServer.getLoginListener().Pending())
        {
            loginQueue.Add(loginServer.getSocket());
            ASCIIEncoding asen = new ASCIIEncoding();
            Socket s = loginQueue.First();
            try
            {
                s.Send(asen.GetBytes("true"));
                queueCount++;
            }
            catch
            {
                loginQueue.Remove(s);
            }
        }
    }
}

返回已接受套接字的函数。

public Socket getSocket()
{
    return myList.AcceptSocket();
}

编辑：问题的本质

我想将收到的socked或客户端添加到我的Account对象中，因此每个连接都有一个链接到的Account，当我想向某个帐户发送消息时，它应该向socked或client绑定发送消息对那个帐户，你能帮我/告诉我如何实现这个目标吗？

Answer 1

这仍然是c＃和套接字，但我的方法与你的不同。

我选择了“connectedCleint”的概念，其目的与您所谓的帐户类似。

我有一个名为ServerTerminal的类，它负责接受套接字连接和顶级管理。在这我有：

 public Dictionary<long, ConnectedClient> DictConnectedClients =
        new Dictionary<long, ConnectedClient>();

所以这是我的sockethandle索引的连接客户端列表。

接受连接，我有一个例程：

public void StartListen(int port)
    {
        socketClosed = false;
        IPEndPoint ipLocal = new IPEndPoint(IPAddress.Any, port);

        listenSocket = new Socket(AddressFamily.InterNetwork,
            SocketType.Stream, ProtocolType.Tcp);

        //bind to local IP Address...
        //if ip address is allready being used write to log
        try
        {
            listenSocket.Bind(ipLocal);
        }
        catch (Exception excpt)
        {
            // Deal with this.. write your own log code here ?
            socketClosed = true;

            return;
        }
        //start listening...

        listenSocket.Listen(100); // Max 100 connections for my app

        // create the call back for any client connections...
        listenSocket.BeginAccept(new AsyncCallback(OnClientConnection), null);

    }

因此，当客户端连接它然后激活：

private void OnClientConnection(IAsyncResult asyn)
    {
        if (socketClosed)
        {
            return;
        }

        try
        {
            Socket clientSocket = listenSocket.EndAccept(asyn);

            ConnectedClient connectedClient = new ConnectedClient(clientSocket, this, _ServerTerminalReceiveMode);

            //connectedClient.MessageReceived += OnMessageReceived;
            connectedClient.Disconnected += OnDisconnection;
            connectedClient.dbMessageReceived += OndbMessageReceived;

            connectedClient.ccSocketFaulted += ccSocketFaulted;

            connectedClient.StartListening();

            long key = clientSocket.Handle.ToInt64();
            if (DictConnectedClients.ContainsKey(connectedClient.SocketHandleInt64))
            {
                // Already here - use your own error reporting..
            }

            lock (DictConnectedClients)
            {
                DictConnectedClients[key] = connectedClient;
            }

            // create the call back for any client connections...
            listenSocket.BeginAccept(new AsyncCallback(OnClientConnection), null);

        }
        catch (ObjectDisposedException excpt)
        {
            // Your own code here..
        }
        catch (Exception excpt)
        {
            // Your own code here...
        }

    }

这对你来说至关重要的部分是：

            // create the call back for any client connections...
            listenSocket.BeginAccept(new AsyncCallback(OnClientConnection), null);

这会设置serverterminal以接收新连接。

编辑： 减少我的connectedclient的版本：

public class ConnectedClient
{
    private Socket mySocket;
    private SocketIO mySocketIO;

    private long _mySocketHandleInt64 = 0;


    // These events are pass through; ConnectedClient offers them but really
    // they are from SocketIO

    public event TCPTerminal_ConnectDel Connected
    {
        add
        {
            mySocketIO.Connected += value;
        }
        remove
        {
            mySocketIO.Connected -= value;
        }
    }

    public event TCPTerminal_DisconnectDel Disconnected
    {
        add
        {
            mySocketIO.Disconnected += value;
        }
        remove
        {
            mySocketIO.Disconnected -= value;
        }
    }

    // Own Events

    public event TCPTerminal_TxMessagePublished TxMessageReceived;

    public delegate void SocketFaulted(ConnectedClient cc);
    public event SocketFaulted ccSocketFaulted;

    private void OnTxMessageReceived(Socket socket, TxMessage myTxMessage)
    {
     // process your message
    }



    private void OnMessageSent(int MessageNumber, int MessageType)
    {
    // successful send, do what you want..
    }





    public ConnectedClient(Socket clientSocket, ServerTerminal ParentST)
    {
        Init(clientSocket, ParentST, ReceiveMode.Handler);
    }

    public ConnectedClient(Socket clientSocket, ServerTerminal ParentST, ReceiveMode RecMode)
    {
        Init(clientSocket, ParentST, RecMode);
    }

    private void Init(Socket clientSocket, ServerTerminal ParentST, ReceiveMode RecMode)
    {
        ParentServerTerminal = ParentST;
        _myReceiveMode = RecMode;

        _FirstConnected = DateTime.Now;
        mySocket = clientSocket;
        _mySocketHandleInt64 = mySocket.Handle.ToInt64();
        mySocketIO = new SocketIO(clientSocket, RecMode);

        // Register for events
        mySocketIO.TxMessageReceived += OnTxMessageReceived;
        mySocketIO.MessageSent += OnMessageSent;
        mySocketIO.dbMessageReceived += OndbMessageReceived;

    }


    public void StartListening()
    {
        mySocketIO.StartReceiving();
    }

    public void Close()
    {
        if (mySocketIO != null)
        {
            mySocketIO.Close();
            mySocketIO = null;
        }

        try
        {
            mySocket.Close();
        }
        catch
        {
            // We're closing.. don't worry about it
        }
    }

    public void SendMessage(int MessageNumber, int MessageType, string Message)
    {
        if (mySocket != null && mySocketIO != null)
        {
            try
            {
                mySocketIO.SendMessage(MessageNumber, MessageType, Message);
            }
            catch
            {
                // mySocketIO disposed inbetween check and call
            }
        }
        else
        {
            // Raise socket faulted event
            if (ccSocketFaulted != null)
                ccSocketFaulted(this);
        }
    }


}

}

一些有用的链接：

这是我开始的地方： http://vadmyst.blogspot.com.au/2008/01/how-to-transfer-fixed-sized-data-with.html

http://vadmyst.blogspot.com.au/2008/03/part-2-how-to-transfer-fixed-sized-data.html

和..

C# Sockets and Multithreading

Cause a connected socket to accept new messages right after .BeginReceive?

http://nitoprograms.blogspot.com.au/2009/04/tcpip-net-sockets-faq.html

http://www.codeproject.com/Articles/83102/C-SocketAsyncEventArgs-High-Performance-Socket-Cod

我现在不能发布我的整个解决方案;我需要调试的服务器代码存在缺陷;加上我的雇主可能不希望发布的部分内容。但我的代码基于Vadym对可变长度消息的依据。

Answer 2

当服务器准备好接受TCP连接时，它会创建一个新的TCP套接字，将它绑定到端口并使用Listen（）方法。当连接请求进入时，Listen（）方法返回服务器和客户端用于通信的新套接字。此时，服务器和客户端可以使用Send（）和Receive（）来回传递数据。如果客户端断开连接，服务器的Receive（）将终止0字节的数据。

如果您希望在接受第一个连接后等待另一个连接请求（即，当您与第一个客户端进行交互时），则可以执行此操作。此时，您需要使用线程或异步方法之类的东西，这样您就可以处理多个连接。基本上，您可以从侦听套接字接受Accept（）连接请求。

麦克