using System;
using System.Net;
using System.Text;
 
namespace NCSIResponder
{
    class Program
    {
        private static string NCSI_RESPONSE = "Microsoft NCSI";
        private static byte[] NCSI_RESPONSE_BYTE = Encoding.UTF8.GetBytes(NCSI_RESPONSE);
 
        static void Main(string[] args)
        {
            var listener = new HttpListener();
            listener.Prefixes.Add("http://127.0.0.1/");
            listener.Start();
            while (true)
            {
                var context = listener.GetContext();
                var request = context.Request;
                Console.WriteLine("[" + DateTime.Now + "] " + request.RemoteEndPoint.Address + " - " + request.Url);
                if (request.RawUrl == "/ncsi.txt")
                {
                    context.Response.StatusCode = 200;
                    context.Response.OutputStream.Write(NCSI_RESPONSE_BYTE, 0, NCSI_RESPONSE_BYTE.Length);
                    context.Response.Close();
                }
                else
                {
                    context.Response.StatusCode = 404;
                    context.Response.Close();
                }
            }
        }
    }
}