Socket 一个服务器监听多个客户端 功能实现
最近公司安排我和另一个同事一起完成一个Socket通信服务器，多个Socket通信客户端，具体的是服务器在window系统下c#开发，客户端是在liunx系统下开发，实现交互通讯。Socket通信服务器启动时，Socket将侦听到的Socket连接传给接受Socket，然后由接受Socket完成接受、发送消息，当Socket存在异常时，断开连接。我负责服务器端功能，所以我这里简单说下我服务器的功能:1、服务器一直监听当前客户端是否有连接2、动态的保留当前有连接状态的客户端3、服务器端和客户端进行交互数据主函数 public void StartListenUp(){
IPAddress myIP = GetIPAddress();
IPEndPoint localEndPoint = new IPEndPoint(myIP, _port);
Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); try
{
listener.Bind(localEndPoint);
listener.Listen(10);
string userIP; while (true)
{
Socket newClient = listener.Accept();
userIP = ((IPEndPoint)newClient.RemoteEndPoint).Address.ToString();
_transmit_IP.Add(userIP, newClient);
Thread clientThread = new Thread(new ParameterizedThreadStart(ThreadFun));
clientThread.Start(userIP);
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}/// 线程执行体,消息传递给线程执行体的用户名，用以与用户通信
private void ThreadFun(object obj)
{
//通过转发表得到当前用户套接字
Socket handler = _transmit_IP as Socket; // 业务处理 }以上是服务器的主要代码并已经和客户端测试通过希望大家批评指正。。。ps：听人劝吃饱饭，查看了微软最新异步通讯的例子调试了下代码如下： public static void StartListening()
{
// Data buffer for incoming data.
byte[] bytes = new Byte; // Establish the local endpoint for the socket.
// The DNS name of the computer
// running the listener is "host.contoso.com".
IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList;
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000); // Create a TCP/IP socket.
Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); // Bind the socket to the local endpoint and listen for incoming connections.
try
{
listener.Bind(localEndPoint);
listener.Listen(100); while (true)
{
// Set the event to nonsignaled state.
allDone.Reset(); // Start an asynchronous socket to listen for connections.
Console.WriteLine("Waiting for a connection...");
listener.BeginAccept(new AsyncCallback(AcceptCallback), listener); // Wait until a connection is made before continuing.
allDone.WaitOne();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
Console.WriteLine("\nPress ENTER to continue...");
Console.Read();
} public static void AcceptCallback(IAsyncResult ar)
{
// Signal the main thread to continue.
allDone.Set(); // Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar); // Create the state object.
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
} public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty; // Retrieve the state object and the handler socket from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket; // Read data from the client socket.
int bytesRead = handler.EndReceive(ar); if (bytesRead > 0)
{
// Theremight be more data, so store the data received so far.
state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead)); // Check for end-of-file tag. If it is not there, read more data.
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1)
{
// All the data has been read from the client. Display it on the console.
Console.WriteLine("Read {0} bytes from socket. \n Data : {1}", content.Length, content);
// Echo the data back to the client.
Send(handler, content);
}
else
{
// Not all data received. Get more.
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
}
}
} private static void Send(Socket handler, String data)
{
// Convert the string data to byte data using ASCII encoding.
byte[] byteData = Encoding.ASCII.GetBytes(data); // Begin sending the data to the remote device.
handler.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), handler);
} private static void SendCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket handler = (Socket)ar.AsyncState; // Complete sending the data to the remote device.
int bytesSent = handler.EndSend(ar);
Console.WriteLine("Sent {0} bytes to client.", bytesSent); handler.Shutdown(SocketShutdown.Both);
handler.Close(); }
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
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