async Task OnAcceptCommandAsync()

in src/Microsoft.Azure.Relay/HybridConnectionListener.cs [483:520]
34 lines of code
4 McCabe index (conditional complexity)

        async Task OnAcceptCommandAsync(ListenerCommand.AcceptCommand acceptCommand)
        {
            Uri rendezvousUri = new Uri(acceptCommand.Address);
            Uri requestUri = this.GenerateAcceptRequestUri(rendezvousUri);

            var listenerContext = new RelayedHttpListenerContext(
                this, requestUri, acceptCommand.Id, "GET", acceptCommand.ConnectHeaders);
            listenerContext.Request.SetRemoteAddress(acceptCommand.RemoteEndpoint);

            RelayEventSource.Log.RelayListenerRendezvousStart(listenerContext.Listener, listenerContext.TrackingContext.TrackingId, acceptCommand.Address);
            try
            {
                var acceptHandler = this.AcceptHandler;
                bool shouldAccept = acceptHandler == null;
                if (acceptHandler != null)
                {
                    // Invoke and await the user's AcceptHandler method
                    try
                    {
                        shouldAccept = await acceptHandler(listenerContext).ConfigureAwait(false);
                    }
                    catch (Exception userException) when (!Fx.IsFatal(userException))
                    {
                        string description = SR.GetString(SR.AcceptHandlerException, listenerContext.TrackingContext.TrackingId);
                        RelayEventSource.Log.RelayListenerRendezvousFailed(this, listenerContext.TrackingContext.TrackingId, description + " " + userException);
                        listenerContext.Response.StatusCode = HttpStatusCode.BadGateway;
                        listenerContext.Response.StatusDescription = description;
                    }
                }

                await this.CompleteAcceptAsync(listenerContext, rendezvousUri, shouldAccept).ConfigureAwait(false);
            }
            catch (Exception exception) when (!Fx.IsFatal(exception))
            {
                RelayEventSource.Log.RelayListenerRendezvousFailed(this, listenerContext.TrackingContext.TrackingId, exception);
                RelayEventSource.Log.RelayListenerRendezvousStop();
            }
        }