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TCPServer.cs
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TCPServer.cs
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using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
class TCPServer
{
// Thread signal.
public static ManualResetEvent allDone = new ManualResetEvent(false);
public static void Main(string[] args)
{
// Set the TcpListener on port 13000.
Int32 port = 13000;
IPAddress localAddr = IPAddress.Parse("127.0.0.1");
// TcpListener server = new TcpListener(port);
TcpListener server = new TcpListener(localAddr, port);
// Start listening for client requests.
server.Start();
while (true)
{
// Set the event to nonsignaled state.
allDone.Reset();
// Start an asynchronous socket to listen for connections.
Console.WriteLine("Waiting for a connection...");
server.BeginAcceptTcpClient(new AsyncCallback(AcceptCallback), server);
// Wait until a connection is made before continuing.
allDone.WaitOne();
}
}
public static void AcceptCallback(IAsyncResult ar)
{
// Signal the main thread to continue.
allDone.Set();
// Get the listener that handles the client request.
TcpListener listener = (TcpListener)ar.AsyncState;
// End the operation and get the connected TcpClient.
TcpClient client = listener.EndAcceptTcpClient(ar);
// Create a new thread to handle communication
// with connected client
Thread t = new Thread(() => HandleClient(client));
t.Start();
}
public static void HandleClient(TcpClient client)
{
// Buffer for reading data
Byte[] bytes = new Byte[256];
String data = null;
// Get a stream object for reading and writing
NetworkStream stream = client.GetStream();
int i;
// Loop to receive all the data sent by the client.
while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
{
// Translate data bytes to a ASCII string.
data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
Console.WriteLine("Received: {0}", data);
// Process the data sent by the client.
data = data.ToUpper();
byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);
// Send back a response.
stream.Write(msg, 0, msg.Length);
Console.WriteLine("Sent: {0}", data);
}
// Shutdown and end connection
client.Close();
}
}