Esempio n. 1
0
func handleRequest(m manager.Manager, w http.ResponseWriter, r *http.Request) error {
	start := time.Now()

	request := r.URL.Path
	requestElements := strings.Split(r.URL.Path, "/")

	// Verify that we have all the elements we expect:
	// <empty>/api/<version>/<request type>[/<args...>]
	// [0]     [1] [2]       [3]             [4...]
	if len(requestElements) < 4 {
		return fmt.Errorf("incomplete API request %q", request)
	}

	// Get all the element parts.
	emptyElement := requestElements[0]
	apiElement := requestElements[1]
	version := requestElements[2]
	requestType := requestElements[3]
	requestArgs := []string{}
	if len(requestElements) > 4 {
		requestArgs = requestElements[4:]
	}

	// The container name is the path after the requestType.
	containerName := path.Join("/", strings.Join(requestArgs, "/"))

	// Check elements.
	if len(emptyElement) != 0 {
		return fmt.Errorf("unexpected API request format %q", request)
	}
	if apiElement != "api" {
		return fmt.Errorf("invalid API request format %q", request)
	}
	if _, ok := supportedApiVersions[version]; !ok {
		return fmt.Errorf("unsupported API version %q", version)
	}

	switch {
	case requestType == machineApi:
		glog.V(2).Infof("Api - Machine")

		// Get the MachineInfo
		machineInfo, err := m.GetMachineInfo()
		if err != nil {
			return err
		}

		err = writeResult(machineInfo, w)
		if err != nil {
			return err
		}
	case requestType == containersApi:
		glog.V(2).Infof("Api - Container(%s)", containerName)

		// Get the query request.
		query, err := getContainerInfoRequest(r.Body)
		if err != nil {
			return err
		}

		// Get the container.
		cont, err := m.GetContainerInfo(containerName, query)
		if err != nil {
			return fmt.Errorf("failed to get container %q with error: %s", containerName, err)
		}

		// Only output the container as JSON.
		err = writeResult(cont, w)
		if err != nil {
			return err
		}
	case requestType == subcontainersApi:
		if version == version1_0 {
			return fmt.Errorf("request type of %q not supported in API version %q", requestType, version)
		}

		glog.V(2).Infof("Api - Subcontainers(%s)", containerName)

		// Get the query request.
		query, err := getContainerInfoRequest(r.Body)
		if err != nil {
			return err
		}

		// Get the subcontainers.
		containers, err := m.SubcontainersInfo(containerName, query)
		if err != nil {
			return fmt.Errorf("failed to get subcontainers for container %q with error: %s", containerName, err)
		}

		// Only output the containers as JSON.
		err = writeResult(containers, w)
		if err != nil {
			return err
		}
	case requestType == dockerApi:
		if version == version1_0 || version == version1_1 {
			return fmt.Errorf("request type of %q not supported in API version %q", requestType, version)
		}

		glog.V(2).Infof("Api - Docker(%s)", containerName)

		// Get the query request.
		query, err := getContainerInfoRequest(r.Body)
		if err != nil {
			return err
		}

		// Get the Docker containers.
		containers, err := m.DockerContainersInfo(containerName, query)
		if err != nil {
			return fmt.Errorf("failed to get docker containers for %q with error: %s", containerName, err)
		}

		// Only output the containers as JSON.
		err = writeResult(containers, w)
		if err != nil {
			return err
		}
	default:
		return fmt.Errorf("unknown API request type %q", requestType)
	}

	glog.V(2).Infof("Request took %s", time.Since(start))
	return nil
}