if canListenTCP4OnLoopback {
			if ln, err := net.Listen("tcp4", "127.0.0.1:0"); err == nil {
				return ln, nil
			}
		}
		if canListenTCP6OnLoopback {
			return net.Listen("tcp6", "[::1]:0")
		}
	case "tcp4":
		if canListenTCP4OnLoopback {
			return net.Listen("tcp4", "127.0.0.1:0")
		}
	case "tcp6":
		if canListenTCP6OnLoopback {
			return net.Listen("tcp6", "[::1]:0")
		}
	case "unix", "unixpacket":

		}
	}
}

func getHosts(n int) (hosts []string, listeners []net.Listener, err error) {
	for i := 0; i < n; i++ {
		l, err := net.Listen("tcp", "127.0.0.1:0")
		if err != nil {
			if l, err = net.Listen("tcp6", "[::1]:0"); err != nil {
				return nil, nil, fmt.Errorf("httptest: failed to listen on a port: %v", err)
			}
		}
		addr := l.Addr()
		hosts = append(hosts, "http://"+addr.String())
		listeners = append(listeners, l)

			WriteTimeout:   time.Minute, // High timeout to allow profiles to run
			MaxHeaderBytes: 1 << 20,
			Handler:        router,
		},
	}

	s.shutdown.Add(1)
	go s.listen()

	return s, nil
}

func (s *Server) listen() {
	log.Infof("ControlZ available at %s", s.httpServer.Addr)
	if listeningTestProbe != nil {
		go listeningTestProbe()
	}
	err := s.httpServer.Serve(s.listener)

		}
	}()

	context.AfterFunc(s.ctx, func() {
		if err := s.cniListenServer.Close(); err != nil {
			log.Errorf("CNI listen server terminated with error: %v", err)
		} else {
			log.Debug("CNI listen server terminated")
		}
	})
	return nil
}

func (s *CniPluginServer) handleAddEvent(w http.ResponseWriter, req *http.Request) {
	if req.Body == nil {

By default it will listen on the IP address `127.0.0.1`, which is the IP for your machine to communicate with itself alone (`localhost`).

## `fastapi run`

When you run `fastapi run`, it will run on production mode by default.

It will have **auto-reload disabled** by default.

					setUpUdsOK = false
				}
			}
			if s.grpcWorkloadListener != nil {
				sdsServiceLog.Infof("Starting SDS server for workload certificates, will listen on %q", security.WorkloadIdentitySocketPath)
				if err = s.grpcWorkloadServer.Serve(s.grpcWorkloadListener); err != nil {
					sdsServiceLog.Errorf("SDS grpc server for workload proxies failed to start: %v", err)

				if svcSelector.Matches(podLabels) {
					for _, port := range service.Ports {
						if port.Protocol == "TCP" {
							// Because the Gateway's server port is the port on which the proxy should listen for incoming connections,
							// the actual port associated with the service is the `TargetPort` that reaches the sidecar *workload instances*.
							if tp := port.TargetPort.IntValue(); tp != 0 {