gistfile1.txt

public class Program
{
    static HttpListener listener;
    static HttpListenerContext context;
    private const int bufferSize = 4096;

    public static void Main()
    {
        listener = new HttpListener("http", 8500);
        listener.Start();

        new Thread(() => {
            while (true)
            {
                try
                {
                    context = listener.GetContext();
                    Process(context);
                }
                catch (Exception ex)
                {
                    Debug.Print(ex.Message);
                    Debug.Print(ex.StackTrace);
                }
            }
        }).Start();

        while(true)
        {
            Thread.Sleep(5000);
            Debug.Print("Still Active");
        }
    }

    private static void Process(HttpListenerContext context)
    {
        Debug.Print("Received " + context.Request.HttpMethod + " - " + context.Request.RawUrl);

        context.Response.StatusCode = (int)HttpStatusCode.OK;
        WriteOutputStream(Encoding.UTF8.GetBytes("Ok"));
    }

    private static void WriteOutputStream(byte[] data)
    {
        context.Response.ContentLength64 = data.Length;

        using (context.Response.OutputStream)
        {
            int i = 0;
            byte[] buffer = new byte[bufferSize];

            while (i * bufferSize <= data.Length)
            {
                int min = Min(bufferSize, data.Length - (i * bufferSize));
                Array.Copy(data, i * bufferSize, buffer, 0, min);
                context.Response.OutputStream.Write(buffer, 0, min);
                i++;
            }
            context.Response.OutputStream.Flush();
        }
    }

    private static int Min(int a, int b)
    {
        if (a <= b)
            return a;
        else
            return b;
    }
}