I have a ToggleSwitch that launches a HttpListener when it is turned on. Below is the code that turns the listener on.
My problem is that the HttpListener is not listening. I requested http://localhost:8023 via Postman and the request is always timed out. And the GetContextCallBack is only called when httpListener.Stop() is invoked. What's the problem of my code? It works in a console app but does not work in UWP.
private void LaunchLocalServer(int port)
{
httpListener = new HttpListener();
httpListener.Prefixes.Add($"http://127.0.0.1:{port}/");
httpListener.Start();
httpListener.BeginGetContext(new AsyncCallback(GetContextCallBack), httpListener);
}
private void GetContextCallBack(IAsyncResult ar)
{
try
{
HttpListener _listener = ar.AsyncState as HttpListener;
if (_listener.IsListening)
{
return;
}
HttpListenerContext context = _listener.EndGetContext(ar);
_listener.BeginGetContext(new AsyncCallback(GetContextCallBack), _listener);
HttpListenerResponse response = context.Response;
response.StatusCode = (int)HttpStatusCode.OK;
response.ContentType = "application/json;charset=UTF-8";
response.ContentEncoding = Encoding.UTF8;
response.AppendHeader("Content-Type", "application/json;charset=UTF-8");
var abcOject = new
{
code = "200",
description = "success",
data = "time=" + DateTime.Now
};
string responseString = JsonConvert.SerializeObject(abcOject,
new JsonSerializerSettings()
{
StringEscapeHandling = StringEscapeHandling.EscapeNonAscii
});
using (StreamWriter writer = new StreamWriter(response.OutputStream, Encoding.UTF8))
{
writer.Write(responseString);
writer.Close();
response.Close();
}
}
catch (Exception ex)
{
Log.Warn($"handle response failed {ex}");
}
}
Full code is here.
