C#

public class TestHttpServer
{
    // listening HTTP port
    private int _Port = 0;

    // internal wrapped HTTP listener
    private HttpListener _Server = new HttpListener();

    private Service1 _manager;

    public TestHttpServer (Service1 manager)
    {
        _manager = manager;
    }

    public int ListenPort
    {
        get
        {
            return _Port;
        }
        set
        {
            _Port = value;
        }
    }

    public void StartListen()
    {
        try
        {
            IAsyncResult result;
            _Server.Prefixes.Add(String.Format("http://+:{0}/", 9099));
            _Server.Start();
            while (true)
            {
                result = _Server.BeginGetContext(new AsyncCallback(this.HttpCallback), _Server);
                result.AsyncWaitHandle.WaitOne();
            }
        }
        // any exceptions are not expected
        // catch InvalidOperationException during service stop
        // [System.InvalidOperationException] = {"Please call the Start() method before calling this method."}
        catch (Exception ex)
        {
            throw ex;
        }
    }

    public void Stop(bool isTerminate)
    {
        _Server.Stop();
    }

    // callback function when there is HTTP request received
    private void HttpCallback(IAsyncResult result)
    {
        HttpListenerContext context = _Server.EndGetContext(result);
        HandleRequest(context);
    }

    // find matched URL HTTP request handler and invoke related handler
    private void HandleRequest(HttpListenerContext context)
    {
        string matchUrl = context.Request.Url.AbsolutePath.Trim().ToLower();

        context.Response.StatusCode = 200;
        context.Response.StatusDescription = "OK";
        context.Response.Close();
    }
}