Golang net.SplitSchemeNamePort函数代码示例

// ResourceLocation returns a URL to which one can send traffic for the specified pod.
func ResourceLocation(getter ResourceGetter, rt http.RoundTripper, ctx api.Context, id string) (*url.URL, http.RoundTripper, error) {
	// Allow ID as "podname" or "podname:port" or "scheme:podname:port".
	// If port is not specified, try to use the first defined port on the pod.
	scheme, name, port, valid := utilnet.SplitSchemeNamePort(id)
	if !valid {
		return nil, nil, errors.NewBadRequest(fmt.Sprintf("invalid pod request %q", id))
	}
	// TODO: if port is not a number but a "(container)/(portname)", do a name lookup.

	pod, err := getPod(getter, ctx, name)
	if err != nil {
		return nil, nil, err
	}

	// Try to figure out a port.
	if port == "" {
		for i := range pod.Spec.Containers {
			if len(pod.Spec.Containers[i].Ports) > 0 {
				port = fmt.Sprintf("%d", pod.Spec.Containers[i].Ports[0].ContainerPort)
				break
			}
		}
	}

	loc := &url.URL{
		Scheme: scheme,
	}
	if port == "" {
		loc.Host = pod.Status.PodIP
	} else {
		loc.Host = net.JoinHostPort(pod.Status.PodIP, port)
	}
	return loc, rt, nil
}

// ResourceLocation returns a URL to which one can send traffic for the specified service.
func (rs *REST) ResourceLocation(ctx api.Context, id string) (*url.URL, http.RoundTripper, error) {
	// Allow ID as "svcname", "svcname:port", or "scheme:svcname:port".
	svcScheme, svcName, portStr, valid := utilnet.SplitSchemeNamePort(id)
	if !valid {
		return nil, nil, errors.NewBadRequest(fmt.Sprintf("invalid service request %q", id))
	}

	// If a port *number* was specified, find the corresponding service port name
	if portNum, err := strconv.ParseInt(portStr, 10, 64); err == nil {
		svc, err := rs.registry.GetService(ctx, svcName)
		if err != nil {
			return nil, nil, err
		}
		found := false
		for _, svcPort := range svc.Spec.Ports {
			if svcPort.Port == int(portNum) {
				// use the declared port's name
				portStr = svcPort.Name
				found = true
				break
			}
		}
		if !found {
			return nil, nil, errors.NewServiceUnavailable(fmt.Sprintf("no service port %d found for service %q", portNum, svcName))
		}
	}

	eps, err := rs.endpoints.GetEndpoints(ctx, svcName)
	if err != nil {
		return nil, nil, err
	}
	if len(eps.Subsets) == 0 {
		return nil, nil, errors.NewServiceUnavailable(fmt.Sprintf("no endpoints available for service %q", svcName))
	}
	// Pick a random Subset to start searching from.
	ssSeed := rand.Intn(len(eps.Subsets))
	// Find a Subset that has the port.
	for ssi := 0; ssi < len(eps.Subsets); ssi++ {
		ss := &eps.Subsets[(ssSeed+ssi)%len(eps.Subsets)]
		if len(ss.Addresses) == 0 {
			continue
		}
		for i := range ss.Ports {
			if ss.Ports[i].Name == portStr {
				// Pick a random address.
				ip := ss.Addresses[rand.Intn(len(ss.Addresses))].IP
				port := ss.Ports[i].Port
				return &url.URL{
					Scheme: svcScheme,
					Host:   net.JoinHostPort(ip, strconv.Itoa(port)),
				}, rs.proxyTransport, nil
			}
		}
	}
	return nil, nil, errors.NewServiceUnavailable(fmt.Sprintf("no endpoints available for service %q", id))
}

// ResourceLocation returns an URL and transport which one can use to send traffic for the specified node.
func ResourceLocation(getter ResourceGetter, connection client.ConnectionInfoGetter, proxyTransport http.RoundTripper, ctx api.Context, id string) (*url.URL, http.RoundTripper, error) {
	schemeReq, name, portReq, valid := utilnet.SplitSchemeNamePort(id)
	if !valid {
		return nil, nil, errors.NewBadRequest(fmt.Sprintf("invalid node request %q", id))
	}

	nodeObj, err := getter.Get(ctx, name)
	if err != nil {
		return nil, nil, err
	}
	node := nodeObj.(*api.Node)
	hostIP, err := nodeutil.GetNodeHostIP(node)
	if err != nil {
		return nil, nil, err
	}
	host := hostIP.String()

	// We check if we want to get a default Kubelet's transport. It happens if either:
	// - no port is specified in request (Kubelet's port is default),
	// - we're using Port stored as a DaemonEndpoint and requested port is a Kubelet's port stored in the DaemonEndpoint,
	// - there's no information in the API about DaemonEnpoint (legacy cluster) and requested port is equal to ports.KubeletPort (cluster-wide config)
	kubeletPort := node.Status.DaemonEndpoints.KubeletEndpoint.Port
	if kubeletPort == 0 {
		kubeletPort = ports.KubeletPort
	}
	if portReq == "" || strconv.Itoa(int(kubeletPort)) == portReq {
		scheme, port, kubeletTransport, err := connection.GetConnectionInfo(ctx, node.Name)
		if err != nil {
			return nil, nil, err
		}
		return &url.URL{
				Scheme: scheme,
				Host: net.JoinHostPort(
					host,
					strconv.FormatUint(uint64(port), 10),
				),
			},
			kubeletTransport,
			nil
	}
	return &url.URL{Scheme: schemeReq, Host: net.JoinHostPort(host, portReq)}, proxyTransport, nil
}