Update GCS storage library to support GetObject API on gzipped objects (#6506)

Fixes #6280

vendor/google.golang.org/api/option/credentials_go19.go

@@ -0,0 +1,32 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build go1.9
+
+package option
+
+import (
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/internal"
+)
+
+type withCreds google.Credentials
+
+func (w *withCreds) Apply(o *internal.DialSettings) {
+	o.Credentials = (*google.Credentials)(w)
+}
+
+func WithCredentials(creds *google.Credentials) ClientOption {
+	return (*withCreds)(creds)
+}

vendor/google.golang.org/api/option/credentials_notgo19.go

@@ -0,0 +1,32 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !go1.9
+
+package option
+
+import (
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/internal"
+)
+
+type withCreds google.DefaultCredentials
+
+func (w *withCreds) Apply(o *internal.DialSettings) {
+	o.Credentials = (*google.DefaultCredentials)(w)
+}
+
+func WithCredentials(creds *google.DefaultCredentials) ClientOption {
+	return (*withCreds)(creds)
+}

vendor/google.golang.org/api/option/option.go

@@ -1,4 +1,4 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
+// Copyright 2017 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -40,19 +40,25 @@ func (w withTokenSource) Apply(o *internal.DialSettings) {
 	o.TokenSource = w.ts
 }
 
-// WithServiceAccountFile returns a ClientOption that uses a Google service
-// account credentials file to authenticate.
-// Use WithTokenSource with a token source created from
-// golang.org/x/oauth2/google.JWTConfigFromJSON
-// if reading the file from disk is not an option.
-func WithServiceAccountFile(filename string) ClientOption {
-	return withServiceAccountFile(filename)
+type withCredFile string
+
+func (w withCredFile) Apply(o *internal.DialSettings) {
+	o.CredentialsFile = string(w)
 }
 
-type withServiceAccountFile string
+// WithCredentialsFile returns a ClientOption that authenticates
+// API calls with the given service account or refresh token JSON
+// credentials file.
+func WithCredentialsFile(filename string) ClientOption {
+	return withCredFile(filename)
+}
 
-func (w withServiceAccountFile) Apply(o *internal.DialSettings) {
-	o.ServiceAccountJSONFilename = string(w)
+// WithServiceAccountFile returns a ClientOption that uses a Google service
+// account credentials file to authenticate.
+//
+// Deprecated: Use WithCredentialsFile instead.
+func WithServiceAccountFile(filename string) ClientOption {
+	return WithCredentialsFile(filename)
 }
 
 // WithEndpoint returns a ClientOption that overrides the default endpoint
@@ -147,6 +153,9 @@ func (w withGRPCConnectionPool) Apply(o *internal.DialSettings) {
 
 // WithAPIKey returns a ClientOption that specifies an API key to be used
 // as the basis for authentication.
+//
+// API Keys can only be used for JSON-over-HTTP APIs, including those under
+// the import path google.golang.org/api/....
 func WithAPIKey(apiKey string) ClientOption {
 	return withAPIKey(apiKey)
 }
@@ -154,3 +163,16 @@ func WithAPIKey(apiKey string) ClientOption {
 type withAPIKey string
 
 func (w withAPIKey) Apply(o *internal.DialSettings) { o.APIKey = string(w) }
+
+// WithoutAuthentication returns a ClientOption that specifies that no
+// authentication should be used. It is suitable only for testing and for
+// accessing public resources, like public Google Cloud Storage buckets.
+// It is an error to provide both WithoutAuthentication and any of WithAPIKey,
+// WithTokenSource, WithCredentialsFile or WithServiceAccountFile.
+func WithoutAuthentication() ClientOption {
+	return withoutAuthentication{}
+}
+
+type withoutAuthentication struct{}
+
+func (w withoutAuthentication) Apply(o *internal.DialSettings) { o.NoAuth = true }