ch8_13.cs

《c#技术内幕代码》

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class CH8_13
{
   public static void SendRequest( string server, int port, string cmd )
   {
        Encoding ASCII = Encoding.ASCII;
        Byte[] ByteGet = ASCII.GetBytes(cmd);
        Byte[] RecvBytes = new Byte[256];
      
        IPAddress hostadd = DNS.Resolve(server);
        IPEndPoint EPhost = new IPEndPoint(hostadd, port);

        Socket s = new Socket(AddressFamily.AfINet, SocketType.SockStream,
            ProtocolType.ProtTCP );

        // Connect to host using IPEndPoint
        if (s.Connect(EPhost) != 0)
        {
	    Console.WriteLine("Unable to connect to host!");
            return;
        }

        // Sent the command  to the host
        s.Send(ByteGet, ByteGet.Length, 0);

        // Receive the response
        Int32 bytes = s.Receive(RecvBytes, RecvBytes.Length, 0);
	string strRetPage = ASCII.GetString(RecvBytes, 0, bytes);

        while (bytes > 0)
        {
            bytes = s.Receive(RecvBytes, RecvBytes.Length, 0);
	    if ( bytes > 0 )
               strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes);
        }
	Console.WriteLine("Received: {0}", strRetPage );

   }   
   
   public static void Main(string[] args)
   {
        if ( args.Length < 3 )
	{
	   Console.WriteLine("Usage: ch8_13 server port cmd");
	   return;
	}
	
        // Get the server name from the arguments
	string server = args[0];
	
        // Get the port id from the arguments
	int port = args[1].ToInt16();
	
        SendRequest( server, port, args[2] );
	
    }
}