public async void Dispatch(HttpListenerContext httpListenerContext)
{
// For health check requests, OK immediately
if (httpListenerContext.Request.RawUrl.Equals("/health-check", StringComparison.InvariantCultureIgnoreCase))
{
using (httpListenerContext.Response)
{
httpListenerContext.Response.StatusCode = 200;
return;
}
}
// For other requests, begin websocket upgrade
WebSocketRemoteDevice remoteDevice = default;
try
{
_logger.Trace($"{httpListenerContext.Request.RemoteEndPoint.Address}:{httpListenerContext.Request.RemoteEndPoint.Port} connected.");
using (httpListenerContext.Response)
{
var webSocketContext = await httpListenerContext.AcceptWebSocketAsync(null);
remoteDevice = new WebSocketRemoteDevice(new WebSocketClient(httpListenerContext, webSocketContext));
_logger.Trace($"{remoteDevice} Http -> WebSocket upgraded OK.");
using (webSocketContext.WebSocket)
{
await _remoteDeviceConnectedHandler.HandleAsync(remoteDevice);
}
}
}
catch (IOException ex)
{
_logger.Warn($"WebSocket Error Device={remoteDevice}, Err{ex.Message}");
}
catch (Exception ex)
{
_logger.Error(ex);
}
finally
{
await CleanUpAsync(remoteDevice);
}
}
async Task CleanUpAsync(WebSocketRemoteDevice remoteDevice)
{
if (remoteDevice == null)
{
return;
}
using (remoteDevice)
{
_logger.Warn($"Device {remoteDevice} disconnected.");
await _remoteDeviceDisconenctedHandler
.HandleAsync(remoteDevice)
.ContinueWith(task =>
{
if (task.Exception != null)
{
_logger.Error("remoteDeviceDisconenctedHandler throws exception", task.Exception);
}
});
}
}