async Task ConnectAsync()

in src/Microsoft.Azure.Relay/HybridConnectionListener.cs [729:774]
37 lines of code
3 McCabe index (conditional complexity)

            async Task<WebSocket> ConnectAsync(CancellationToken cancellationToken)
            {
                this.listener.ThrowIfDisposed();
                var webSocket = this.listener.ClientWebSocketFactory.Create();
                try
                {
                    var connectDelay = ConnectDelayIntervals[this.connectDelayIndex];
                    if (connectDelay != TimeSpan.Zero)
                    {
                        await Task.Delay(connectDelay, cancellationToken).ConfigureAwait(false);
                    }

                    RelayEventSource.Log.ObjectConnecting(this.listener);
                    webSocket.Options.SetBuffer(this.bufferSize, this.bufferSize);
                    DefaultWebProxy.ConfigureProxy(webSocket.Options, this.listener.Proxy);

                    webSocket.Options.KeepAliveInterval = this.listener.KeepAliveInterval;
                    webSocket.Options.SetRequestHeader(HybridConnectionConstants.Headers.RelayUserAgent, HybridConnectionConstants.ClientAgent);

                    var token = await this.tokenRenewer.GetTokenAsync().ConfigureAwait(false);
                    webSocket.Options.SetRequestHeader(RelayConstants.ServiceBusAuthorizationHeaderName, token.TokenString);

                    // When we reconnect we need to remove the "_GXX" suffix otherwise trackingId gets longer after each reconnect
                    string trackingId = TrackingContext.RemoveSuffix(this.listener.TrackingContext.TrackingId);

                    // Build the websocket uri, e.g. "wss://contoso.servicebus.windows.net:443/$hc/endpoint1?sb-hc-action=listen&sb-hc-id=E2E_TRACKING_ID"
                    var webSocketUri = HybridConnectionUtility.BuildUri(
                        this.address.Host,
                        this.address.Port,
                        this.address.AbsolutePath,
                        this.address.Query,
                        HybridConnectionConstants.Actions.Listen,
                        trackingId);

                    await webSocket.ConnectAsync(webSocketUri, cancellationToken).ConfigureAwait(false);

                    this.OnOnline();
                    RelayEventSource.Log.ObjectConnected(this.listener);
                    return webSocket.WebSocket;
                }
                catch (Exception exception) when (!WebSocketExceptionHelper.IsRelayContract(exception))
                {
                    throw RelayEventSource.Log.ThrowingException(
                        WebSocketExceptionHelper.ConvertToRelayContract(exception, this.listener.TrackingContext, webSocket.Response), this.listener);
                }
            }