// NewServiceAccountFromKey constructs the credentials using the JSON key slice
// from a Google Developers service account.
func NewServiceAccountFromKey(jsonKey []byte, scope ...string) (credentials.Credentials, error) {
config, err := google.JWTConfigFromJSON(jsonKey, scope...)
if err != nil {
return nil, err
}
return serviceAccount{config: config}, nil
}
// newClient creates http.Client with a jwt service account when
// jsonFile flag is specified, otherwise by obtaining the GCE service
// account's access token.
func newClient(jsonFile string) (*http.Client, error) {
if jsonFile != "" {
jsonKey, err := ioutil.ReadFile(jsonFile)
if err != nil {
return nil, err
}
conf, err := google.JWTConfigFromJSON(jsonKey, pubsub.ScopePubSub)
if err != nil {
return nil, err
}
return conf.Client(oauth2.NoContext), nil
}
if metadata.OnGCE() {
c := &http.Client{
Transport: &oauth2.Transport{
Source: google.ComputeTokenSource(""),
},
}
if *projID == "" {
projectID, err := metadata.ProjectID()
if err != nil {
return nil, fmt.Errorf("ProjectID failed, %v", err)
}
*projID = projectID
}
return c, nil
}
return nil, errors.New("Could not create an authenticated client.")
}
func getToken() *oauth2.Token {
jsonKey := getServiceAccountJSONKey()
config, err := google.JWTConfigFromJSON(jsonKey, *oauthScope)
if err != nil {
grpclog.Fatalf("Failed to get the config: %v", err)
}
token, err := config.TokenSource(context.Background()).Token()
if err != nil {
grpclog.Fatalf("Failed to get the token: %v", err)
}
return token
}
// GoogleTokenSourceFromJSONKey provides an oauth2.TokenSource
// authorized in the same manner as GoogleClientFromJSONKey.
func GoogleTokenSourceFromJSONKey(jsonKey []byte, scope ...string) (oauth2.TokenSource, error) {
if scope == nil {
scope = conf.Scopes
}
jwtConf, err := google.JWTConfigFromJSON(jsonKey, scope...)
if err != nil {
return nil, err
}
return jwtConf.TokenSource(oauth2.NoContext), nil
}
// GoogleClientFromJSONKey provides an http.Client authorized with an
// oauth2 token retrieved using a Google Developers service account's
// private JSON key file.
func GoogleClientFromJSONKey(jsonKey []byte, scope ...string) (*http.Client, error) {
if scope == nil {
scope = conf.Scopes
}
jwtConf, err := google.JWTConfigFromJSON(jsonKey, scope...)
if err != nil {
return nil, err
}
return jwtConf.Client(oauth2.NoContext), nil
}
func Context(scopes ...string) context.Context {
key, projID := os.Getenv(envPrivateKey), os.Getenv(envProjID)
if key == "" || projID == "" {
log.Fatal("GCLOUD_TESTS_GOLANG_KEY and GCLOUD_TESTS_GOLANG_PROJECT_ID must be set. See CONTRIBUTING.md for details.")
}
jsonKey, err := ioutil.ReadFile(key)
if err != nil {
log.Fatalf("Cannot read the JSON key file, err: %v", err)
}
conf, err := google.JWTConfigFromJSON(jsonKey, scopes...)
if err != nil {
log.Fatal(err)
}
return cloud.NewContext(projID, conf.Client(oauth2.NoContext))
}
func Example_auth() context.Context {
// Initialize an authorized context with Google Developers Console
// JSON key. Read the google package examples to learn more about
// different authorization flows you can use.
// http://godoc.org/golang.org/x/oauth2/google
jsonKey, err := ioutil.ReadFile("/path/to/json/keyfile.json")
if err != nil {
log.Fatal(err)
}
conf, err := google.JWTConfigFromJSON(
jsonKey,
storage.ScopeFullControl,
)
if err != nil {
log.Fatal(err)
}
ctx := cloud.NewContext("project-id", conf.Client(oauth2.NoContext))
// Use the context (see other examples)
return ctx
}
func ExampleJWTConfigFromJSON() {
// Your credentials should be obtained from the Google
// Developer Console (https://console.developers.google.com).
// Navigate to your project, then see the "Credentials" page
// under "APIs & Auth".
// To create a service account client, click "Create new Client ID",
// select "Service Account", and click "Create Client ID". A JSON
// key file will then be downloaded to your computer.
data, err := ioutil.ReadFile("/path/to/your-project-key.json")
if err != nil {
log.Fatal(err)
}
conf, err := google.JWTConfigFromJSON(data, "https://www.googleapis.com/auth/bigquery")
if err != nil {
log.Fatal(err)
}
// Initiate an http.Client. The following GET request will be
// authorized and authenticated on the behalf of
// your service account.
client := conf.Client(oauth2.NoContext)
client.Get("...")
}