public class LocalServer
{
    public bool runListener = true;
    private string prefix;
    private string baseDirectory = "M:/ftp backup/";

    public LocalServer(int port)
    {
        prefix = string.Format("http://+:{0}/", port);
        Thread listenerThread = new Thread(LocalServerThread);
        listenerThread.Start();
    }

    public void LocalServerThread()
    {
        HttpListener listener = new HttpListener();
        listener.Prefixes.Add(prefix);
        listener.Start();
        Debug.Log(DateTime.Now.ToString(SimpleHTTPServer.dateFormat) + "<color=green>Started local web server</color>");
        while (runListener)
        {
            IAsyncResult result = listener.BeginGetContext(new AsyncCallback(ListenerCallback), listener);
            result.AsyncWaitHandle.WaitOne();
        }
        listener.Close();
        Debug.Log(DateTime.Now.ToString(SimpleHTTPServer.dateFormat) + "<color=green>Stopped local web server</color>");
    }

    public void ListenerCallback(IAsyncResult result)
    {
        HttpListener listener = (HttpListener)result.AsyncState;
        HttpListenerContext context = listener.EndGetContext(result);
        string fileNameComplete = context.Request.Url.AbsolutePath.Substring(1).Replace("%20", " "); //removing the first slash and replacing the %20 web prefix by space
        string pathComplete = baseDirectory + fileNameComplete;
        Debug.Log(DateTime.Now.ToString(SimpleHTTPServer.dateFormat) + pathComplete + " requested to LocalServer");
        using (Stream fileStream = new FileStream(pathComplete, FileMode.Open))
        {
            byte[] buffer = new byte[fileStream.Length];
            fileStream.Read(buffer, 0, (int)fileStream.Length);
            context.Response.ContentLength64 = fileStream.Length;
            context.Response.ContentType = SimpleHTTPServer.GetMimeType(fileNameComplete);

            //personal headers
            context.Response.StatusCode = (int)HttpStatusCode.OK;
            ////apache headers
            //context.Response.StatusDescription = "OK";
            //context.Response.ProtocolVersion = new Version("1.1");
            //context.Response.SendChunked = false;
            //context.Response.KeepAlive = true;
            //context.Response.AddHeader("Accept-Ranges", "bytes");
            //context.Response.AddHeader("ETag", BinarySocket.RandomString(20));
            //context.Response.AddHeader("Connection", "Keep-Alive");
            //context.Response.AddHeader("Keep-Alive", "timeout=5, max=100");
            ////CORS
            //context.Response.AddHeader("Access-Control-Allow-Origin", "*");
            //context.Response.AddHeader("Access-Control-Allow-Methods", "GET, POST, OPTIONS");
            //context.Response.AddHeader("Access-Control-Allow-Headers", "X-Requested-With");
            //context.Response.AddHeader("Access-Control-Max-Age", "86400");

            context.Response.OutputStream.Write(buffer, 0, buffer.Length);
            context.Response.Close();
        }
    }
}