Golang Authorizer.HasPermission方法代碼示例

// NewModelManagerAPI creates a new api server endpoint for managing
// models.
func NewModelManagerAPI(
	st common.ModelManagerBackend,
	configGetter environs.EnvironConfigGetter,
	authorizer facade.Authorizer,
) (*ModelManagerAPI, error) {
	if !authorizer.AuthClient() {
		return nil, common.ErrPerm
	}
	// Since we know this is a user tag (because AuthClient is true),
	// we just do the type assertion to the UserTag.
	apiUser, _ := authorizer.GetAuthTag().(names.UserTag)
	// Pretty much all of the user manager methods have special casing for admin
	// users, so look once when we start and remember if the user is an admin.
	isAdmin, err := authorizer.HasPermission(permission.SuperuserAccess, st.ControllerTag())
	if err != nil {
		return nil, errors.Trace(err)
	}
	urlGetter := common.NewToolsURLGetter(st.ModelUUID(), st)
	return &ModelManagerAPI{
		ModelStatusAPI: common.NewModelStatusAPI(st, authorizer, apiUser),
		state:          st,
		check:          common.NewBlockChecker(st),
		authorizer:     authorizer,
		toolsFinder:    common.NewToolsFinder(configGetter, st, urlGetter),
		apiUser:        apiUser,
		isAdmin:        isAdmin,
	}, nil
}

// NewCloudAPI creates a new API server endpoint for managing the controller's
// cloud definition and cloud credentials.
func NewCloudAPI(backend Backend, authorizer facade.Authorizer) (*CloudAPI, error) {

	if !authorizer.AuthClient() {
		return nil, common.ErrPerm
	}

	getUserAuthFunc := func() (common.AuthFunc, error) {
		authUser, _ := authorizer.GetAuthTag().(names.UserTag)
		isAdmin, err := authorizer.HasPermission(permission.SuperuserAccess, backend.ControllerTag())
		if err != nil && !errors.IsNotFound(err) {
			return nil, err
		}
		return func(tag names.Tag) bool {
			userTag, ok := tag.(names.UserTag)
			if !ok {
				return false
			}
			return isAdmin || userTag == authUser
		}, nil
	}
	return &CloudAPI{
		backend:                backend,
		authorizer:             authorizer,
		getCredentialsAuthFunc: getUserAuthFunc,
	}, nil
}

func NewUserManagerAPI(
	st *state.State,
	resources facade.Resources,
	authorizer facade.Authorizer,
) (*UserManagerAPI, error) {
	if !authorizer.AuthClient() {
		return nil, common.ErrPerm
	}

	// Since we know this is a user tag (because AuthClient is true),
	// we just do the type assertion to the UserTag.
	apiUser, _ := authorizer.GetAuthTag().(names.UserTag)
	// Pretty much all of the user manager methods have special casing for admin
	// users, so look once when we start and remember if the user is an admin.
	isAdmin, err := authorizer.HasPermission(permission.SuperuserAccess, st.ControllerTag())
	if err != nil {
		return nil, errors.Trace(err)
	}

	return &UserManagerAPI{
		state:      st,
		authorizer: authorizer,
		check:      common.NewBlockChecker(st),
		apiUser:    apiUser,
		isAdmin:    isAdmin,
	}, nil
}

func checkAuth(authorizer facade.Authorizer, st *state.State) error {
	if !authorizer.AuthClient() {
		return errors.Trace(common.ErrPerm)
	}

	if isAdmin, err := authorizer.HasPermission(permission.SuperuserAccess, st.ControllerTag()); err != nil {
		return errors.Trace(err)
	} else if !isAdmin {
		// The entire facade is only accessible to controller administrators.
		return errors.Trace(common.ErrPerm)
	}
	return nil
}

// NewAPI creates a new instance of the Backups API facade.
func NewAPI(backend Backend, resources facade.Resources, authorizer facade.Authorizer) (*API, error) {
	isControllerAdmin, err := authorizer.HasPermission(permission.SuperuserAccess, backend.ControllerTag())
	if err != nil && !errors.IsNotFound(err) {
		return nil, errors.Trace(err)
	}

	if !authorizer.AuthClient() || !isControllerAdmin {
		return nil, common.ErrPerm
	}

	// For now, backup operations are only permitted on the controller environment.
	if !backend.IsController() {
		return nil, errors.New("backups are not supported for hosted models")
	}

	// Get the backup paths.
	dataDir, err := extractResourceValue(resources, "dataDir")
	if err != nil {
		return nil, errors.Trace(err)
	}
	logsDir, err := extractResourceValue(resources, "logDir")
	if err != nil {
		return nil, errors.Trace(err)
	}
	paths := backups.Paths{
		DataDir: dataDir,
		LogsDir: logsDir,
	}

	// Build the API.
	machineID, err := extractResourceValue(resources, "machineID")
	if err != nil {
		return nil, errors.Trace(err)
	}
	b := API{
		backend:   backend,
		paths:     &paths,
		machineID: machineID,
	}
	return &b, nil
}