cbsch-pslib

1.0.15

module/src/StartWebServerCmdlet.cs

 
using System;
using System.Management.Automation;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Linq;
 
namespace Cbsch.PSlib {
 
 
    [Cmdlet("Start", "WebServer")]
    public class StartWebServerCmdlet : PSCmdlet {
        [Parameter(Mandatory = true, Position = 0)]
        public IPAddress IPAddress;
 
        protected override void EndProcessing() {
            Console.WriteLine("StartListening");
            AsynchronousSocketListener.StartListening(IPAddress);
        }
    }
 
    public class StateObject {
        // Size of receive buffer.
        public const int BufferSize = 1024;
 
        // Receive buffer.
        public byte[] buffer = new byte[BufferSize];
 
        // Received data string.
        public StringBuilder sb = new StringBuilder();
 
        // Client socket.
        public Socket workSocket = null;
    }
 
    public class AsynchronousSocketListener {
        // Thread signal.
        public static ManualResetEvent allDone = new ManualResetEvent(false);
 
        public AsynchronousSocketListener() {
        }
 
        public static void StartListening(IPAddress ipAddress) {
            // 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());
 
            Console.WriteLine("Listen on " + ipAddress.ToString());
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);
 
            // Create a TCP/IP socket.
            Socket listener = new Socket(ipAddress.AddressFamily,
                SocketType.Stream, ProtocolType.Tcp);
 
            // Bind the socket to the local endpoint and listen for incoming connections.
            try {
                listener.Bind(localEndPoint);
                listener.Listen(101);
 
                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.
            Console.WriteLine("Test 1...");
            allDone.Set();
 
            Console.WriteLine("Test 2...");
            // 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) {
                // There might 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());
            }
        }
    }
}