Add scopes if required.

Jerjou Cheng · Jerjou Cheng · commit 1179b2b749e7 · 2015-09-10T17:46:26.000-07:00
This is necessary when using a service account via setting the
GOOGLE_APPLICATION_CREDENTIALS environment variable.
diff --git a/pom.xml b/pom.xml
@@ -14,6 +14,8 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.http.version>1.19.0</project.http.version>
         <project.oauth.version>1.19.0</project.oauth.version>
+        <maven.compiler.target>1.7</maven.compiler.target>
+        <maven.compiler.source>1.7</maven.compiler.source>
     </properties>
 
     <prerequisites>
diff --git a/storage/json-api/src/main/java/StorageSample.java b/storage/json-api/src/main/java/StorageSample.java
@@ -20,6 +20,7 @@
 import com.google.api.client.json.JsonFactory;
 import com.google.api.client.json.jackson2.JacksonFactory;
 import com.google.api.services.storage.Storage;
+import com.google.api.services.storage.StorageScopes;
 import com.google.api.services.storage.model.Bucket;
 import com.google.api.services.storage.model.ObjectAccessControl;
 import com.google.api.services.storage.model.Objects;
@@ -61,6 +62,12 @@ public class StorageSample {
   private static Storage getService() throws IOException, GeneralSecurityException {
     if (null == storageService) {
       GoogleCredential credential = GoogleCredential.getApplicationDefault();
+      // Depending on the environment that provides the default credentials (e.g. Compute Engine,
+      // App Engine), the credentials may require us to specify the scopes we need explicitly.
+      // Check for this case, and inject the Bigquery scope if required.
+      if (credential.createScopedRequired()) {
+        credential = credential.createScoped(StorageScopes.all());
+      }
       HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
       storageService = new Storage.Builder(httpTransport, JSON_FACTORY, credential)
           .setApplicationName(APPLICATION_NAME).build();
