openstack/client.go - debian/gophercloud - Gitiles

 package openstack

 import (
 	"fmt"
 	"net/url"
 	"strings"

 	"github.com/rackspace/gophercloud"
 	identity2 "github.com/rackspace/gophercloud/openstack/identity/v2"
 	endpoints3 "github.com/rackspace/gophercloud/openstack/identity/v3/endpoints"
 	services3 "github.com/rackspace/gophercloud/openstack/identity/v3/services"
 	tokens3 "github.com/rackspace/gophercloud/openstack/identity/v3/tokens"
 	"github.com/rackspace/gophercloud/openstack/utils"
 	"github.com/rackspace/gophercloud/pagination"
 )

 const (
 	v20 = "v2.0"
 	v30 = "v3.0"
 )

 // NewClient prepares an unauthenticated ProviderClient instance.
 // Most users will probably prefer using the AuthenticatedClient function instead.
 // This is useful if you wish to explicitly control the version of the identity service that's used for authentication explicitly,
 // for example.
 func NewClient(endpoint string) (*gophercloud.ProviderClient, error) {
 	u, err := url.Parse(endpoint)
 	if err != nil {
 		return nil, err
 	}
 	hadPath := u.Path != ""
 	u.Path, u.RawQuery, u.Fragment = "", "", ""
 	base := u.String()

 	endpoint = normalizeURL(endpoint)
 	base = normalizeURL(base)

 	if hadPath {
 		return &gophercloud.ProviderClient{
 			IdentityBase:     base,
 			IdentityEndpoint: endpoint,
 		}, nil
 	}

 	return &gophercloud.ProviderClient{
 		IdentityBase:     base,
 		IdentityEndpoint: "",
 	}, nil
 }

 // AuthenticatedClient logs in to an OpenStack cloud found at the identity endpoint specified by options, acquires a token, and
 // returns a Client instance that's ready to operate.
 // It first queries the root identity endpoint to determine which versions of the identity service are supported, then chooses
 // the most recent identity service available to proceed.
 func AuthenticatedClient(options gophercloud.AuthOptions) (*gophercloud.ProviderClient, error) {
 	client, err := NewClient(options.IdentityEndpoint)
 	if err != nil {
 		return nil, err
 	}

 	err = Authenticate(client, options)
 	if err != nil {
 		return nil, err
 	}
 	return client, nil
 }

 // Authenticate or re-authenticate against the most recent identity service supported at the provided endpoint.
 func Authenticate(client *gophercloud.ProviderClient, options gophercloud.AuthOptions) error {
 	versions := []*utils.Version{
 		&utils.Version{ID: v20, Priority: 20, Suffix: "/v2.0/"},
 		&utils.Version{ID: v30, Priority: 30, Suffix: "/v3/"},
 	}

 	chosen, endpoint, err := utils.ChooseVersion(client.IdentityBase, client.IdentityEndpoint, versions)
 	if err != nil {
 		return err
 	}

 	switch chosen.ID {
 	case v20:
 		return v2auth(client, endpoint, options)
 	case v30:
 		return v3auth(client, endpoint, options)
 	default:
 		// The switch statement must be out of date from the versions list.
 		return fmt.Errorf("Unrecognized identity version: %s", chosen.ID)
 	}
 }

 // AuthenticateV2 explicitly authenticates against the identity v2 endpoint.
 func AuthenticateV2(client *gophercloud.ProviderClient, options gophercloud.AuthOptions) error {
 	return v2auth(client, "", options)
 }

 func v2auth(client *gophercloud.ProviderClient, endpoint string, options gophercloud.AuthOptions) error {
 	v2Client := NewIdentityV2(client)
 	if endpoint != "" {
 		v2Client.Endpoint = endpoint
 	}

 	result, err := identity2.Authenticate(v2Client, options)
 	if err != nil {
 		return err
 	}

 	token, err := identity2.GetToken(result)
 	if err != nil {
 		return err
 	}

 	client.TokenID = token.ID
 	client.EndpointLocator = func(opts gophercloud.EndpointOpts) (string, error) {
 		return v2endpointLocator(result, opts)
 	}

 	return nil
 }

 func v2endpointLocator(authResults identity2.AuthResults, opts gophercloud.EndpointOpts) (string, error) {
 	catalog, err := identity2.GetServiceCatalog(authResults)
 	if err != nil {
 		return "", err
 	}

 	entries, err := catalog.CatalogEntries()
 	if err != nil {
 		return "", err
 	}

 	// Extract Endpoints from the catalog entries that match the requested Type, Name if provided, and Region if provided.
 	var endpoints = make([]identity2.Endpoint, 0, 1)
 	for _, entry := range entries {
 		if (entry.Type == opts.Type) && (opts.Name == "" || entry.Name == opts.Name) {
 			for _, endpoint := range entry.Endpoints {
 				if opts.Region == "" || endpoint.Region == opts.Region {
 					endpoints = append(endpoints, endpoint)
 				}
 			}
 		}
 	}

 	// Report an error if the options were ambiguous.
 	if len(endpoints) == 0 {
 		return "", gophercloud.ErrEndpointNotFound
 	}
 	if len(endpoints) > 1 {
 		return "", fmt.Errorf("Discovered %d matching endpoints: %#v", len(endpoints), endpoints)
 	}

 	// Extract the appropriate URL from the matching Endpoint.
 	for _, endpoint := range endpoints {
 		switch opts.Availability {
 		case gophercloud.AvailabilityPublic:
 			return normalizeURL(endpoint.PublicURL), nil
 		case gophercloud.AvailabilityInternal:
 			return normalizeURL(endpoint.InternalURL), nil
 		default:
 			return "", fmt.Errorf("Unexpected availability in endpoint query: %s", opts.Availability)
 		}
 	}

 	return "", gophercloud.ErrEndpointNotFound
 }

 // AuthenticateV3 explicitly authenticates against the identity v3 service.
 func AuthenticateV3(client *gophercloud.ProviderClient, options gophercloud.AuthOptions) error {
 	return v3auth(client, "", options)
 }

 func v3auth(client *gophercloud.ProviderClient, endpoint string, options gophercloud.AuthOptions) error {
 	// Override the generated service endpoint with the one returned by the version endpoint.
 	v3Client := NewIdentityV3(client)
 	if endpoint != "" {
 		v3Client.Endpoint = endpoint
 	}

 	result, err := tokens3.Create(v3Client, options, nil)
 	if err != nil {
 		return err
 	}

 	client.TokenID, err = result.TokenID()
 	if err != nil {
 		return err
 	}
 	client.EndpointLocator = func(opts gophercloud.EndpointOpts) (string, error) {
 		return v3endpointLocator(v3Client, opts)
 	}

 	return nil
 }

 func v3endpointLocator(v3Client *gophercloud.ServiceClient, opts gophercloud.EndpointOpts) (string, error) {
 	// Discover the service we're interested in.
 	var services = make([]services3.Service, 0, 1)
 	servicePager := services3.List(v3Client, services3.ListOpts{ServiceType: opts.Type})
 	err := servicePager.EachPage(func(page pagination.Page) (bool, error) {
 		part, err := services3.ExtractServices(page)
 		if err != nil {
 			return false, err
 		}

 		for _, service := range part {
 			if service.Name == opts.Name {
 				services = append(services, service)
 			}
 		}

 		return true, nil
 	})
 	if err != nil {
 		return "", err
 	}

 	if len(services) == 0 {
 		return "", gophercloud.ErrServiceNotFound
 	}
 	if len(services) > 1 {
 		return "", fmt.Errorf("Discovered %d matching services: %#v", len(services), services)
 	}
 	service := services[0]

 	// Enumerate the endpoints available for this service.
 	var endpoints []endpoints3.Endpoint
 	endpointPager := endpoints3.List(v3Client, endpoints3.ListOpts{
 		Availability: opts.Availability,
 		ServiceID:    service.ID,
 	})
 	err = endpointPager.EachPage(func(page pagination.Page) (bool, error) {
 		part, err := endpoints3.ExtractEndpoints(page)
 		if err != nil {
 			return false, err
 		}

 		for _, endpoint := range part {
 			if opts.Region == "" || endpoint.Region == opts.Region {
 				endpoints = append(endpoints, endpoint)
 			}
 		}

 		return true, nil
 	})
 	if err != nil {
 		return "", err
 	}

 	if len(endpoints) == 0 {
 		return "", gophercloud.ErrEndpointNotFound
 	}
 	if len(endpoints) > 1 {
 		return "", fmt.Errorf("Discovered %d matching endpoints: %#v", len(endpoints), endpoints)
 	}
 	endpoint := endpoints[0]

 	return normalizeURL(endpoint.URL), nil
 }

 // normalizeURL ensures that each endpoint URL has a closing `/`, as expected by ServiceClient.
 func normalizeURL(url string) string {
 	if !strings.HasSuffix(url, "/") {
 		return url + "/"
 	}
 	return url
 }

 // NewIdentityV2 creates a ServiceClient that may be used to interact with the v2 identity service.
 func NewIdentityV2(client *gophercloud.ProviderClient) *gophercloud.ServiceClient {
 	v2Endpoint := client.IdentityBase + "v2.0/"

 	return &gophercloud.ServiceClient{
 		Provider: client,
 		Endpoint: v2Endpoint,
 	}
 }

 // NewIdentityV3 creates a ServiceClient that may be used to access the v3 identity service.
 func NewIdentityV3(client *gophercloud.ProviderClient) *gophercloud.ServiceClient {
 	v3Endpoint := client.IdentityBase + "v3/"

 	return &gophercloud.ServiceClient{
 		Provider: client,
 		Endpoint: v3Endpoint,
 	}
 }

 // NewStorageV1 creates a ServiceClient that may be used with the v1 object storage package.
 func NewStorageV1(client *gophercloud.ProviderClient, eo gophercloud.EndpointOpts) (*gophercloud.ServiceClient, error) {
 	eo.ApplyDefaults("object-store")
 	url, err := client.EndpointLocator(eo)
 	if err != nil {
 		return nil, err
 	}
 	return &gophercloud.ServiceClient{Provider: client, Endpoint: url}, nil
 }

 // NewComputeV2 creates a ServiceClient that may be used with the v2 compute package.
 func NewComputeV2(client *gophercloud.ProviderClient, eo gophercloud.EndpointOpts) (*gophercloud.ServiceClient, error) {
 	eo.ApplyDefaults("compute")
 	url, err := client.EndpointLocator(eo)
 	if err != nil {
 		return nil, err
 	}
 	return &gophercloud.ServiceClient{Provider: client, Endpoint: url}, nil
 }
	package openstack

	import (
	"fmt"
	"net/url"
	"strings"

	"github.com/rackspace/gophercloud"
	identity2 "github.com/rackspace/gophercloud/openstack/identity/v2"
	endpoints3 "github.com/rackspace/gophercloud/openstack/identity/v3/endpoints"
	services3 "github.com/rackspace/gophercloud/openstack/identity/v3/services"
	tokens3 "github.com/rackspace/gophercloud/openstack/identity/v3/tokens"
	"github.com/rackspace/gophercloud/openstack/utils"
	"github.com/rackspace/gophercloud/pagination"
	)

	const (
	v20 = "v2.0"
	v30 = "v3.0"
	)

	// NewClient prepares an unauthenticated ProviderClient instance.
	// Most users will probably prefer using the AuthenticatedClient function instead.
	// This is useful if you wish to explicitly control the version of the identity service that's used for authentication explicitly,
	// for example.
	func NewClient(endpoint string) (*gophercloud.ProviderClient, error) {
	u, err := url.Parse(endpoint)
	if err != nil {
	return nil, err
	}
	hadPath := u.Path != ""
	u.Path, u.RawQuery, u.Fragment = "", "", ""
	base := u.String()

	endpoint = normalizeURL(endpoint)
	base = normalizeURL(base)

	if hadPath {
	return &gophercloud.ProviderClient{
	IdentityBase: base,
	IdentityEndpoint: endpoint,
	}, nil
	}

	return &gophercloud.ProviderClient{
	IdentityBase: base,
	IdentityEndpoint: "",
	}, nil
	}

	// AuthenticatedClient logs in to an OpenStack cloud found at the identity endpoint specified by options, acquires a token, and
	// returns a Client instance that's ready to operate.
	// It first queries the root identity endpoint to determine which versions of the identity service are supported, then chooses
	// the most recent identity service available to proceed.
	func AuthenticatedClient(options gophercloud.AuthOptions) (*gophercloud.ProviderClient, error) {
	client, err := NewClient(options.IdentityEndpoint)
	if err != nil {
	return nil, err
	}

	err = Authenticate(client, options)
	if err != nil {
	return nil, err
	}
	return client, nil
	}

	// Authenticate or re-authenticate against the most recent identity service supported at the provided endpoint.
	func Authenticate(client *gophercloud.ProviderClient, options gophercloud.AuthOptions) error {
	versions := []*utils.Version{
	&utils.Version{ID: v20, Priority: 20, Suffix: "/v2.0/"},
	&utils.Version{ID: v30, Priority: 30, Suffix: "/v3/"},
	}

	chosen, endpoint, err := utils.ChooseVersion(client.IdentityBase, client.IdentityEndpoint, versions)
	if err != nil {
	return err
	}

	switch chosen.ID {
	case v20:
	return v2auth(client, endpoint, options)
	case v30:
	return v3auth(client, endpoint, options)
	default:
	// The switch statement must be out of date from the versions list.
	return fmt.Errorf("Unrecognized identity version: %s", chosen.ID)
	}
	}

	// AuthenticateV2 explicitly authenticates against the identity v2 endpoint.
	func AuthenticateV2(client *gophercloud.ProviderClient, options gophercloud.AuthOptions) error {
	return v2auth(client, "", options)
	}

	func v2auth(client *gophercloud.ProviderClient, endpoint string, options gophercloud.AuthOptions) error {
	v2Client := NewIdentityV2(client)
	if endpoint != "" {
	v2Client.Endpoint = endpoint
	}

	result, err := identity2.Authenticate(v2Client, options)
	if err != nil {
	return err
	}

	token, err := identity2.GetToken(result)
	if err != nil {
	return err
	}

	client.TokenID = token.ID
	client.EndpointLocator = func(opts gophercloud.EndpointOpts) (string, error) {
	return v2endpointLocator(result, opts)
	}

	return nil
	}

	func v2endpointLocator(authResults identity2.AuthResults, opts gophercloud.EndpointOpts) (string, error) {
	catalog, err := identity2.GetServiceCatalog(authResults)
	if err != nil {
	return "", err
	}

	entries, err := catalog.CatalogEntries()
	if err != nil {
	return "", err
	}

	// Extract Endpoints from the catalog entries that match the requested Type, Name if provided, and Region if provided.
	var endpoints = make([]identity2.Endpoint, 0, 1)
	for _, entry := range entries {
	if (entry.Type == opts.Type) && (opts.Name == "" \|\| entry.Name == opts.Name) {
	for _, endpoint := range entry.Endpoints {
	if opts.Region == "" \|\| endpoint.Region == opts.Region {
	endpoints = append(endpoints, endpoint)
	}
	}
	}
	}

	// Report an error if the options were ambiguous.
	if len(endpoints) == 0 {
	return "", gophercloud.ErrEndpointNotFound
	}
	if len(endpoints) > 1 {
	return "", fmt.Errorf("Discovered %d matching endpoints: %#v", len(endpoints), endpoints)
	}

	// Extract the appropriate URL from the matching Endpoint.
	for _, endpoint := range endpoints {
	switch opts.Availability {
	case gophercloud.AvailabilityPublic:
	return normalizeURL(endpoint.PublicURL), nil
	case gophercloud.AvailabilityInternal:
	return normalizeURL(endpoint.InternalURL), nil
	default:
	return "", fmt.Errorf("Unexpected availability in endpoint query: %s", opts.Availability)
	}
	}

	return "", gophercloud.ErrEndpointNotFound
	}

	// AuthenticateV3 explicitly authenticates against the identity v3 service.
	func AuthenticateV3(client *gophercloud.ProviderClient, options gophercloud.AuthOptions) error {
	return v3auth(client, "", options)
	}

	func v3auth(client *gophercloud.ProviderClient, endpoint string, options gophercloud.AuthOptions) error {
	// Override the generated service endpoint with the one returned by the version endpoint.
	v3Client := NewIdentityV3(client)
	if endpoint != "" {
	v3Client.Endpoint = endpoint
	}

	result, err := tokens3.Create(v3Client, options, nil)
	if err != nil {
	return err
	}

	client.TokenID, err = result.TokenID()
	if err != nil {
	return err
	}
	client.EndpointLocator = func(opts gophercloud.EndpointOpts) (string, error) {
	return v3endpointLocator(v3Client, opts)
	}

	return nil
	}

	func v3endpointLocator(v3Client *gophercloud.ServiceClient, opts gophercloud.EndpointOpts) (string, error) {
	// Discover the service we're interested in.
	var services = make([]services3.Service, 0, 1)
	servicePager := services3.List(v3Client, services3.ListOpts{ServiceType: opts.Type})
	err := servicePager.EachPage(func(page pagination.Page) (bool, error) {
	part, err := services3.ExtractServices(page)
	if err != nil {
	return false, err
	}

	for _, service := range part {
	if service.Name == opts.Name {
	services = append(services, service)
	}
	}

	return true, nil
	})
	if err != nil {
	return "", err
	}

	if len(services) == 0 {
	return "", gophercloud.ErrServiceNotFound
	}
	if len(services) > 1 {
	return "", fmt.Errorf("Discovered %d matching services: %#v", len(services), services)
	}
	service := services[0]

	// Enumerate the endpoints available for this service.
	var endpoints []endpoints3.Endpoint
	endpointPager := endpoints3.List(v3Client, endpoints3.ListOpts{
	Availability: opts.Availability,
	ServiceID: service.ID,
	})
	err = endpointPager.EachPage(func(page pagination.Page) (bool, error) {
	part, err := endpoints3.ExtractEndpoints(page)
	if err != nil {
	return false, err
	}

	for _, endpoint := range part {
	if opts.Region == "" \|\| endpoint.Region == opts.Region {
	endpoints = append(endpoints, endpoint)
	}
	}

	return true, nil
	})
	if err != nil {
	return "", err
	}

	if len(endpoints) == 0 {
	return "", gophercloud.ErrEndpointNotFound
	}
	if len(endpoints) > 1 {
	return "", fmt.Errorf("Discovered %d matching endpoints: %#v", len(endpoints), endpoints)
	}
	endpoint := endpoints[0]

	return normalizeURL(endpoint.URL), nil
	}

	// normalizeURL ensures that each endpoint URL has a closing `/`, as expected by ServiceClient.
	func normalizeURL(url string) string {
	if !strings.HasSuffix(url, "/") {
	return url + "/"
	}
	return url
	}

	// NewIdentityV2 creates a ServiceClient that may be used to interact with the v2 identity service.
	func NewIdentityV2(client gophercloud.ProviderClient) gophercloud.ServiceClient {
	v2Endpoint := client.IdentityBase + "v2.0/"

	return &gophercloud.ServiceClient{
	Provider: client,
	Endpoint: v2Endpoint,
	}
	}

	// NewIdentityV3 creates a ServiceClient that may be used to access the v3 identity service.
	func NewIdentityV3(client gophercloud.ProviderClient) gophercloud.ServiceClient {
	v3Endpoint := client.IdentityBase + "v3/"

	return &gophercloud.ServiceClient{
	Provider: client,
	Endpoint: v3Endpoint,
	}
	}

	// NewStorageV1 creates a ServiceClient that may be used with the v1 object storage package.
	func NewStorageV1(client gophercloud.ProviderClient, eo gophercloud.EndpointOpts) (gophercloud.ServiceClient, error) {
	eo.ApplyDefaults("object-store")
	url, err := client.EndpointLocator(eo)
	if err != nil {
	return nil, err
	}
	return &gophercloud.ServiceClient{Provider: client, Endpoint: url}, nil
	}

	// NewComputeV2 creates a ServiceClient that may be used with the v2 compute package.
	func NewComputeV2(client gophercloud.ProviderClient, eo gophercloud.EndpointOpts) (gophercloud.ServiceClient, error) {
	eo.ApplyDefaults("compute")
	url, err := client.EndpointLocator(eo)
	if err != nil {
	return nil, err
	}
	return &gophercloud.ServiceClient{Provider: client, Endpoint: url}, nil
	}