com.google.api.client.http.HttpTransport Java Examples

/**
 * Constructor that will automatically instantiate a Google Cloud Pub/Sub instance.
 *
 * @throws IOException when the initialization of the Google Cloud Pub/Sub client fails.
 */
public GcloudPubsub() throws IOException {
  if (CLOUD_PUBSUB_PROJECT_ID == null) {
    throw new IllegalStateException(GCLOUD_PUBSUB_PROJECT_ID_NOT_SET_ERROR);
  }
  try {
    serverName = InetAddress.getLocalHost().getCanonicalHostName();
  } catch (UnknownHostException e) {
    throw new IllegalStateException("Unable to retrieve the hostname of the system");
  }
  HttpTransport httpTransport = checkNotNull(Utils.getDefaultTransport());
  JsonFactory jsonFactory = checkNotNull(Utils.getDefaultJsonFactory());
  GoogleCredential credential = GoogleCredential.getApplicationDefault(
      httpTransport, jsonFactory);
  if (credential.createScopedRequired()) {
    credential = credential.createScoped(PubsubScopes.all());
  }
  HttpRequestInitializer initializer =
      new RetryHttpInitializerWrapper(credential);
  pubsub = new Pubsub.Builder(httpTransport, jsonFactory, initializer).build();
  logger.info("Google Cloud Pub/Sub Initialization SUCCESS");
}
 

/**
 * Gets {@link GoogleCredential} instance constructed for service account.
 */
@Override
public GoogleCredential getCredential(Collection<String> scopes)
    throws GeneralSecurityException, IOException {

  JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();

  HttpTransport transport = proxy.getHttpTransport();
  if (!isJsonKey) {
    return credentialHelper.getP12Credential(
        serviceAccountId,
        serviceAccountKeyFilePath,
        transport,
        jsonFactory,
        proxy.getHttpRequestInitializer(),
        scopes);
  }
  return credentialHelper.getJsonCredential(
      serviceAccountKeyFilePath,
      transport,
      jsonFactory,
      proxy.getHttpRequestInitializer(),
      scopes);
}
 

/**
 * Create a Storage Transfer client using user-supplied credentials and other settings.
 *
 * @param httpTransport a user-supplied HttpTransport
 * @param jsonFactory a user-supplied JsonFactory
 * @param credential a user-supplied Google credential
 * @return a Storage Transfer client
 */
public static Storagetransfer createStorageTransferClient(
    HttpTransport httpTransport, JsonFactory jsonFactory, GoogleCredentials credential) {
  Preconditions.checkNotNull(httpTransport);
  Preconditions.checkNotNull(jsonFactory);
  Preconditions.checkNotNull(credential);

  // In some cases, you need to add the scope explicitly.
  if (credential.createScopedRequired()) {
    credential = credential.createScoped(StoragetransferScopes.all());
  }
  // Please use custom HttpRequestInitializer for automatic
  // retry upon failures. We provide a simple reference
  // implementation in the "Retry Handling" section.
  HttpRequestInitializer initializer = new HttpCredentialsAdapter(credential);
  return new Storagetransfer.Builder(httpTransport, jsonFactory, initializer)
      .setApplicationName("storagetransfer-sample")
      .build();
}
 

@Test
public void testGetCredentialP12() throws Exception {
  File tmpfile = temporaryFolder.newFile(SERVICE_ACCOUNT_FILE_P12);
  GoogleCredential mockCredential = new MockGoogleCredential.Builder().build();
  List<String> scopes = Arrays.asList("profile, calendar");
  when(mockCredentialHelper.getP12Credential(
      eq("ServiceAccount"),
      eq(tmpfile.toPath()),
      any(HttpTransport.class),
      any(JsonFactory.class),
      any(HttpRequestInitializer.class),
      eq(scopes)))
      .thenReturn(mockCredential);
  LocalFileCredentialFactory credentialFactory =
      new LocalFileCredentialFactory.Builder()
          .setServiceAccountKeyFilePath(tmpfile.getAbsolutePath())
          .setServiceAccountId("ServiceAccount")
          .build();
  assertEquals(mockCredential, credentialFactory.getCredential(scopes));
}
 

@Test
public void testfromConfigurationJsonKey() throws Exception {
  File tmpfile = temporaryFolder.newFile("testfromConfiguration" + SERVICE_ACCOUNT_FILE_JSON);
  createConfig(tmpfile.getAbsolutePath(), "");
  GoogleCredential mockCredential = new MockGoogleCredential.Builder().build();
  List<String> scopes = Arrays.asList("profile");
  when(mockCredentialHelper.getJsonCredential(
      eq(tmpfile.toPath()),
      any(HttpTransport.class),
      any(JsonFactory.class),
      any(HttpRequestInitializer.class),
      eq(scopes)))
      .thenReturn(mockCredential);
  LocalFileCredentialFactory credentialFactory = LocalFileCredentialFactory.fromConfiguration();
  assertEquals(mockCredential, credentialFactory.getCredential(scopes));
}
 

/**
 * @param method                        method of presenting the access token to the resource
 *                                      server (for example
 *                                      {@link BearerToken#authorizationHeaderAccessMethod})
 * @param transport                     HTTP transport
 * @param jsonFactory                   JSON factory
 * @param tokenServerUrl                token server URL
 * @param clientAuthentication          client authentication or {@code null} for
 *                                      none (see
 *                                      {@link TokenRequest#setClientAuthentication(HttpExecuteInterceptor)}
 *                                      )
 * @param clientId                      client identifier
 * @param authorizationServerEncodedUrl authorization server encoded URL
 */
public Builder(AccessMethod method,
               HttpTransport transport,
               JsonFactory jsonFactory,
               GenericUrl tokenServerUrl,
               HttpExecuteInterceptor clientAuthentication,
               String clientId,
               String authorizationServerEncodedUrl) {
    super(method,
            transport,
            jsonFactory,
            tokenServerUrl,
            clientAuthentication,
            clientId,
            authorizationServerEncodedUrl);
}
 

public void initService(Handler handler) throws CloudsyncException
{

	if (service != null) return;

	final HttpTransport httpTransport = new NetHttpTransport();
	final JsonFactory jsonFactory = new JacksonFactory();
	service = new Drive.Builder(httpTransport, jsonFactory, null)
		.setApplicationName("Backup")
		.setHttpRequestInitializer(credential)
		.build();
	if (StringUtils.isEmpty(credential.getServiceAccountId())) {
		credential.setExpiresInSeconds(MIN_TOKEN_REFRESH_TIMEOUT);
	}
	try
	{
		refreshCredential();
	}
	catch (IOException e)
	{
		throw new CloudsyncException("couldn't refresh google drive token");
	}
	handler.getRootItem().setRemoteIdentifier(_getBackupFolder().getId());
}
 

@Test
public void testApiServiceWithPrebuiltClient() throws Exception {
  MockLowLevelHttpRequest request = buildRequest(200, new GenericJson());
  HttpTransport transport = new TestingHttpTransport(ImmutableList.of(request));
  TestApi apiClient =
      (TestApi)
          new TestApi.Builder(transport, JSON_FACTORY, null)
              .setApplicationName("bring your own client")
              .build();
  TestApiService apiService =
      new TestApiService.Builder()
          .setService(apiClient)
          .setTransport(transport)
          .setCredentialFactory(scopes -> new MockGoogleCredential.Builder().build())
          .build();
  validateEmptyItem(apiService.get());
  assertThat(
      request.getHeaderValues("user-agent").get(0), containsString("bring your own client"));
}
 

public Optional<Credential> load() {
     Properties properties = new Properties();
     try {
File file = getAuthenticationFile(options);
         if(!file.exists() || !file.canRead()) {
             LOGGER.log(Level.FINE, "Cannot find or read properties file. Returning empty credentials.");
             return Optional.empty();
         }
         properties.load(new FileReader(file));
         HttpTransport httpTransport = new NetHttpTransport();
         JsonFactory jsonFactory = new JacksonFactory();
         GoogleCredential credential = new GoogleCredential.Builder().setJsonFactory(jsonFactory)
                 .setTransport(httpTransport).setClientSecrets(OAuth2ClientCredentials.CLIENT_ID, OAuth2ClientCredentials.CLIENT_SECRET).build();
         credential.setAccessToken(properties.getProperty(PROP_ACCESS_TOKEN));
         credential.setRefreshToken(properties.getProperty(PROP_REFRESH_TOKEN));
         return Optional.of(credential);
     } catch (IOException e) {
         throw new JDriveSyncException(JDriveSyncException.Reason.IOException, "Failed to load properties file: " + e.getMessage(), e);
     }
 }
 

@Before
public void setup() throws Exception {
  when(pipelineOptionsHierarchyFactory.forProject(
          eq(project), eq(MajorVersion.ONE), any(IProgressMonitor.class)))
      .thenReturn(pipelineOptionsHierarchy);

  credential = new GoogleCredential.Builder()
      .setJsonFactory(mock(JsonFactory.class))
      .setTransport(mock(HttpTransport.class))
      .setClientSecrets("clientId", "clientSecret").build();
  credential.setRefreshToken("fake-refresh-token");
  when(loginService.getCredential("[email protected]")).thenReturn(credential);

  when(dependencyManager.getProjectMajorVersion(project)).thenReturn(MajorVersion.ONE);
  dataflowDelegate = new DataflowPipelineLaunchDelegate(javaDelegate,
      pipelineOptionsHierarchyFactory, dependencyManager, workspaceRoot, loginService);

  pipelineArguments.put("accountEmail", "");
  when(configurationWorkingCopy.getAttribute(
      eq(ILaunchManager.ATTR_ENVIRONMENT_VARIABLES), anyMapOf(String.class, String.class)))
      .thenReturn(environmentMap);
}
 

/** Builds a new Pubsub client and returns it. */
public static Pubsub getClient(final HttpTransport httpTransport, final JsonFactory jsonFactory)
    throws IOException {
  checkNotNull(httpTransport);
  checkNotNull(jsonFactory);
  GoogleCredential credential =
      GoogleCredential.getApplicationDefault(httpTransport, jsonFactory);
  if (credential.createScopedRequired()) {
    credential = credential.createScoped(PubsubScopes.all());
  }
  if (credential.getClientAuthentication() != null) {
    System.out.println(
        "\n***Warning! You are not using service account credentials to "
            + "authenticate.\nYou need to use service account credentials for this example,"
            + "\nsince user-level credentials do not have enough pubsub quota,\nand so you will run "
            + "out of PubSub quota very quickly.\nSee "
            + "https://developers.google.com/identity/protocols/application-default-credentials.");
    System.exit(1);
  }
  HttpRequestInitializer initializer = new RetryHttpInitializerWrapper(credential);
  return new Pubsub.Builder(httpTransport, jsonFactory, initializer)
      .setApplicationName(APP_NAME)
      .build();
}
 

OAuth1DataGenerator(
    OAuth1Config config,
    AppCredentials appCredentials,
    HttpTransport httpTransport,
    String datatype,
    AuthMode mode,
    Monitor monitor) {
  this.config = config;
  this.monitor = monitor;
  validateConfig();

  this.clientId = appCredentials.getKey();
  this.clientSecret = appCredentials.getSecret();
  this.httpTransport = httpTransport;
  this.scope =
      mode == AuthMode.EXPORT
          ? config.getExportScopes().get(datatype)
          : config.getImportScopes().get(datatype);
}
 

/**
 * @param method method of presenting the access token to the resource
 *            server (for example
 *            {@link BearerToken#authorizationHeaderAccessMethod})
 * @param transport HTTP transport
 * @param jsonFactory JSON factory
 * @param tokenServerUrl token server URL
 * @param clientAuthentication client authentication or {@code null} for
 *            none (see
 *            {@link TokenRequest#setClientAuthentication(HttpExecuteInterceptor)}
 *            )
 * @param clientId client identifier
 * @param authorizationServerEncodedUrl authorization server encoded URL
 */
public Builder(AccessMethod method,
        HttpTransport transport,
        JsonFactory jsonFactory,
        GenericUrl tokenServerUrl,
        HttpExecuteInterceptor clientAuthentication,
        String clientId,
        String authorizationServerEncodedUrl) {
    super(method,
            transport,
            jsonFactory,
            tokenServerUrl,
            clientAuthentication,
            clientId,
            authorizationServerEncodedUrl);
}
 

public void testReturnRawInputStream_True() throws Exception {
  HttpTransport transport = new MockHttpTransport() {
    @Override
    public LowLevelHttpRequest buildRequest(final String method, final String url) {
      return new MockLowLevelHttpRequest() {
        @Override
        public LowLevelHttpResponse execute() {
          return new MockLowLevelHttpResponse().setContentEncoding("gzip").setContent(new ByteArrayInputStream(
              BaseEncoding.base64()
                  .decode("H4sIAAAAAAAAAPNIzcnJV3DPz0/PSVVwzskvTVEILskvSkxPVQQA/LySchsAAAA=")));
        }
      };
    }
  };
  MockGoogleClient client = new MockGoogleClient.Builder(transport, ROOT_URL, SERVICE_PATH,
      JSON_OBJECT_PARSER, null).setApplicationName(
      "Test Application").build();
  MockGoogleClientRequest<String> request = new MockGoogleClientRequest<String>(
      client, HttpMethods.GET, URI_TEMPLATE, null, String.class);
  request.setReturnRawInputStream(true);
  InputStream inputStream = request.executeAsInputStream();
  // The response will not be wrapped due to setReturnRawInputStream(true)
  assertTrue(inputStream instanceof ByteArrayInputStream);
}
 

private final GoogleCredential getDefaultCredentialUnsynchronized(
    HttpTransport transport, JsonFactory jsonFactory) throws IOException {
  if (detectedEnvironment == null) {
    detectedEnvironment = detectEnvironment(transport);
  }

  switch (detectedEnvironment) {
    case ENVIRONMENT_VARIABLE:
      return getCredentialUsingEnvironmentVariable(transport, jsonFactory);
    case WELL_KNOWN_FILE:
      return getCredentialUsingWellKnownFile(transport, jsonFactory);
    case APP_ENGINE:
      return getAppEngineCredential(transport, jsonFactory);
    case CLOUD_SHELL:
      return getCloudShellCredential(jsonFactory);
    case COMPUTE_ENGINE:
      return getComputeCredential(transport, jsonFactory);
    default:
      return null;
  }
}
 

/**
 * Ensures initialization of Google Application Default Credentials. Any test that depends on
 * ADC should consider this as a fixture, and invoke it before hand. Since ADC are initialized
 * once per JVM, this makes sure that all dependent tests get the same ADC instance, and
 * can reliably reason about the tokens minted using it.
 */
public static synchronized GoogleCredentials getApplicationDefaultCredentials()
    throws IOException {
  if (defaultCredentials != null) {
    return defaultCredentials;
  }
  final MockTokenServerTransport transport = new MockTokenServerTransport(
      "https://accounts.google.com/o/oauth2/token");
  transport.addServiceAccount(ServiceAccount.EDITOR.getEmail(), TEST_ADC_ACCESS_TOKEN);
  File serviceAccount = new File("src/test/resources/service_accounts", "editor.json");
  Map<String, String> environmentVariables =
      ImmutableMap.<String, String>builder()
          .put("GOOGLE_APPLICATION_CREDENTIALS", serviceAccount.getAbsolutePath())
          .build();
  setEnvironmentVariables(environmentVariables);
  defaultCredentials = GoogleCredentials.getApplicationDefault(new HttpTransportFactory() {
    @Override
    public HttpTransport create() {
      return transport;
    }
  });
  return defaultCredentials;
}
 

private static SQLAdmin createAdminApiClient(HttpRequestInitializer requestInitializer) {
  HttpTransport httpTransport;
  try {
    httpTransport = GoogleNetHttpTransport.newTrustedTransport();
  } catch (GeneralSecurityException | IOException err) {
    throw new RuntimeException("Unable to initialize HTTP transport", err);
  }

  String rootUrl = System.getProperty(API_ROOT_URL_PROPERTY);
  String servicePath = System.getProperty(API_SERVICE_PATH_PROPERTY);

  JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();
  SQLAdmin.Builder adminApiBuilder =
      new Builder(httpTransport, jsonFactory, requestInitializer)
          .setApplicationName(getUserAgents());
  if (rootUrl != null) {
    logTestPropertyWarning(API_ROOT_URL_PROPERTY);
    adminApiBuilder.setRootUrl(rootUrl);
  }
  if (servicePath != null) {
    logTestPropertyWarning(API_SERVICE_PATH_PROPERTY);
    adminApiBuilder.setServicePath(servicePath);
  }
  return adminApiBuilder.build();
}
 

@GET
public Response getGoogleCallbackURL(@Context HttpServletRequest request) {

    JsonFactory jsonFactory = new JacksonFactory();
    HttpTransport httpTransport = new NetHttpTransport();

    GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow(httpTransport, jsonFactory, config.google_key, config.google_secret, Arrays
                    .asList("https://www.googleapis.com/auth/userinfo.profile", "https://www.googleapis.com/auth/userinfo.email"));

    try {
        // google will tell the users browser to go to this address once
        // they are done authing.
        String callbackURL = config.authUrl + "/GoogleCallback";
        request.getSession().setAttribute("google", flow);

        String authorizationUrl = flow.newAuthorizationUrl().setRedirectUri(callbackURL).build();

        // send the user to google to be authenticated.
        return Response.temporaryRedirect(new URI(authorizationUrl)).build();
    } catch (Exception e) {
        e.printStackTrace();
        return Response.status(500).build();
    }
}
 

public HttpResponse getTimeEntryForHttpResponse(String accessToken,  String xeroTenantId,  UUID projectId,  UUID timeEntryId) throws IOException {
    // verify the required parameter 'xeroTenantId' is set
    if (xeroTenantId == null) {
        throw new IllegalArgumentException("Missing the required parameter 'xeroTenantId' when calling getTimeEntry");
    }// verify the required parameter 'projectId' is set
    if (projectId == null) {
        throw new IllegalArgumentException("Missing the required parameter 'projectId' when calling getTimeEntry");
    }// verify the required parameter 'timeEntryId' is set
    if (timeEntryId == null) {
        throw new IllegalArgumentException("Missing the required parameter 'timeEntryId' when calling getTimeEntry");
    }
    if (accessToken == null) {
        throw new IllegalArgumentException("Missing the required parameter 'accessToken' when calling getTimeEntry");
    }
    HttpHeaders headers = new HttpHeaders();
    headers.set("Xero-Tenant-Id", xeroTenantId);
    headers.setAccept("application/json"); 
    headers.setUserAgent(this.getUserAgent()); 
    // create a map of path variables
    final Map<String, Object> uriVariables = new HashMap<String, Object>();
    uriVariables.put("projectId", projectId);
    uriVariables.put("timeEntryId", timeEntryId);

    UriBuilder uriBuilder = UriBuilder.fromUri(apiClient.getBasePath() + "/projects/{projectId}/time/{timeEntryId}");
    String url = uriBuilder.buildFromMap(uriVariables).toString();
    GenericUrl genericUrl = new GenericUrl(url);
    if (logger.isDebugEnabled()) {
        logger.debug("GET " + genericUrl.toString());
    }
    
    HttpContent content = null;
    Credential credential = new Credential(BearerToken.authorizationHeaderAccessMethod()).setAccessToken(accessToken);
    HttpTransport transport = apiClient.getHttpTransport();       
    HttpRequestFactory requestFactory = transport.createRequestFactory(credential);
    return requestFactory.buildRequest(HttpMethods.GET, genericUrl, content).setHeaders(headers)
        .setConnectTimeout(apiClient.getConnectionTimeout())
        .setReadTimeout(apiClient.getReadTimeout()).execute();  
}
 

private HttpTransport createTransport(final LowLevelHttpRequest request) {
  return new HttpTransport() {
    @Override
    protected LowLevelHttpRequest buildRequest(String method, String url) throws IOException {
      return request;
    }
  };
}
 

public HttpResponse createAssetTypeForHttpResponse(String accessToken,  String xeroTenantId,  AssetType assetType) throws IOException {
    // verify the required parameter 'xeroTenantId' is set
    if (xeroTenantId == null) {
        throw new IllegalArgumentException("Missing the required parameter 'xeroTenantId' when calling createAssetType");
    }
    if (accessToken == null) {
        throw new IllegalArgumentException("Missing the required parameter 'accessToken' when calling createAssetType");
    }
    HttpHeaders headers = new HttpHeaders();
    headers.set("Xero-Tenant-Id", xeroTenantId);
    headers.setAccept("application/json"); 
    headers.setUserAgent(this.getUserAgent());
    UriBuilder uriBuilder = UriBuilder.fromUri(apiClient.getBasePath() + "/AssetTypes");
    String url = uriBuilder.build().toString();
    GenericUrl genericUrl = new GenericUrl(url);
    if (logger.isDebugEnabled()) {
        logger.debug("POST " + genericUrl.toString());
    }
    
    HttpContent content = null;
    content = apiClient.new JacksonJsonHttpContent(assetType);
    
    Credential credential = new Credential(BearerToken.authorizationHeaderAccessMethod()).setAccessToken(accessToken);
    HttpTransport transport = apiClient.getHttpTransport();       
    HttpRequestFactory requestFactory = transport.createRequestFactory(credential);
    return requestFactory.buildRequest(HttpMethods.POST, genericUrl, content).setHeaders(headers)
        .setConnectTimeout(apiClient.getConnectionTimeout())
        .setReadTimeout(apiClient.getReadTimeout()).execute();  
}
 

/**
 * Create an OAuthThreeLeggedFlow instance from the required information.
 *
 * @param userId Key that can be used to associate this flow with an end user.
 * @param consumerKey Key that identifies the server to the service provider.
 * @param consumerSecret Secret that is shared between the server and the service provider.
 * @param authorizationServerUrl Url with which we communicate to authorize tis application.
 * @param temporaryTokenUrl Url which we will use to obtain a temporary token.
 * @param callbackUrl Url which the server should redirect the user to after obtaining
 *        authorization.
 *
 * @throws IOException Exception thrown when the flow is unable to communicate with the service
 *         provider.
 */
public OAuthHmacThreeLeggedFlow(String userId,
    String consumerKey,
    String consumerSecret,
    String authorizationServerUrl,
    String temporaryTokenUrl,
    String callbackUrl,
    HttpTransport transport) throws IOException {

  this.userId = userId;
  this.consumerSecret = consumerSecret;
  this.consumerKey = consumerKey;
  this.transport = transport;
  this.authorizationServerUrl = authorizationServerUrl;

  OAuthGetTemporaryToken temporaryToken = new OAuthGetTemporaryToken(callbackUrl);
  OAuthHmacSigner signer = new OAuthHmacSigner();
  signer.clientSharedSecret = consumerSecret;
  temporaryToken.signer = signer;
  temporaryToken.consumerKey = consumerKey;
  temporaryToken.callback = callbackUrl;
  temporaryToken.transport = this.transport;

  OAuthCredentialsResponse tempCredentials = temporaryToken.execute();

  tempToken = tempCredentials.token;
  tempTokenSecret = tempCredentials.tokenSecret;

  OAuthAuthorizeTemporaryTokenUrl authorizeUrl =
      new OAuthAuthorizeTemporaryTokenUrl(temporaryTokenUrl);
  authorizeUrl.temporaryToken = tempCredentials.token;
  this.authorizationUrl = authorizeUrl.build();
}
 

@Override
public Apps newAppsApi(Credential credential) {
  Preconditions.checkNotNull(transportCache, "transportCache is null");
  HttpTransport transport = transportCache.getUnchecked(GoogleApi.APPENGINE_ADMIN_API);
  Preconditions.checkNotNull(transport, "transport is null");
  Preconditions.checkNotNull(jsonFactory, "jsonFactory is null");

  Appengine appengine =
      new Appengine.Builder(transport, jsonFactory, credential)
          .setApplicationName(CloudToolsInfo.USER_AGENT).build();
  return appengine.apps();
}
 

@Override
public TestApi.Builder getServiceBuilder(
    HttpTransport transport,
    JsonFactory jsonFactory,
    HttpRequestInitializer requestInitializer) {
  return new TestApi.Builder(transport, jsonFactory, requestInitializer);
}
 

public void testFrom_noDetails() throws Exception {
  HttpTransport transport = new MockHttpTransport();
  HttpRequest request =
      transport.createRequestFactory().buildGetRequest(HttpTesting.SIMPLE_GENERIC_URL);
  request.setThrowExceptionOnExecuteError(false);
  HttpResponse response = request.execute();
  GoogleJsonResponseException ge =
      GoogleJsonResponseException.from(GoogleJsonErrorTest.FACTORY, response);
  assertNull(ge.getDetails());
  assertEquals("200", ge.getMessage());
}
 

@Test
public void testRequestWithNonRetryableError() throws Exception {
  HttpTransport transport =
      new TestingHttpTransport(ImmutableList.of(buildRequest(400, new GenericJson())));
  TestApiService apiService =
      new TestApiService.Builder()
          .setTransport(transport)
          .setCredentialFactory(scopes -> new MockGoogleCredential.Builder().build())
          .build();
  thrown.expect(GoogleJsonResponseException.class);
  apiService.get();
}
 

public HttpResponse getTaskForHttpResponse(String accessToken,  String xeroTenantId,  UUID projectId,  UUID taskId) throws IOException {
    // verify the required parameter 'xeroTenantId' is set
    if (xeroTenantId == null) {
        throw new IllegalArgumentException("Missing the required parameter 'xeroTenantId' when calling getTask");
    }// verify the required parameter 'projectId' is set
    if (projectId == null) {
        throw new IllegalArgumentException("Missing the required parameter 'projectId' when calling getTask");
    }// verify the required parameter 'taskId' is set
    if (taskId == null) {
        throw new IllegalArgumentException("Missing the required parameter 'taskId' when calling getTask");
    }
    if (accessToken == null) {
        throw new IllegalArgumentException("Missing the required parameter 'accessToken' when calling getTask");
    }
    HttpHeaders headers = new HttpHeaders();
    headers.set("Xero-Tenant-Id", xeroTenantId);
    headers.setAccept("application/json"); 
    headers.setUserAgent(this.getUserAgent()); 
    // create a map of path variables
    final Map<String, Object> uriVariables = new HashMap<String, Object>();
    uriVariables.put("projectId", projectId);
    uriVariables.put("taskId", taskId);

    UriBuilder uriBuilder = UriBuilder.fromUri(apiClient.getBasePath() + "/projects/{projectId}/tasks/{taskId}");
    String url = uriBuilder.buildFromMap(uriVariables).toString();
    GenericUrl genericUrl = new GenericUrl(url);
    if (logger.isDebugEnabled()) {
        logger.debug("GET " + genericUrl.toString());
    }
    
    HttpContent content = null;
    Credential credential = new Credential(BearerToken.authorizationHeaderAccessMethod()).setAccessToken(accessToken);
    HttpTransport transport = apiClient.getHttpTransport();       
    HttpRequestFactory requestFactory = transport.createRequestFactory(credential);
    return requestFactory.buildRequest(HttpMethods.GET, genericUrl, content).setHeaders(headers)
        .setConnectTimeout(apiClient.getConnectionTimeout())
        .setReadTimeout(apiClient.getReadTimeout()).execute();  
}
 

public void testDefaultCredentialCaches() throws IOException  {
  HttpTransport transport = new MockHttpTransport();
  TestDefaultCredentialProvider testProvider = new TestDefaultCredentialProvider();
  testProvider.addType(DefaultCredentialProvider.APP_ENGINE_CREDENTIAL_CLASS,
      MockAppEngineCredential.class);
  testProvider.addType(GAE_SIGNAL_CLASS, MockAppEngineSystemProperty.class);

  Credential firstCall = testProvider.getDefaultCredential(transport, JSON_FACTORY);

  assertNotNull(firstCall);

  Credential secondCall = testProvider.getDefaultCredential(transport, JSON_FACTORY);

  assertSame(firstCall, secondCall);
}
 

protected GerritOptions mockGerritOptions(GitRepository credentialsRepo) {
  return new GerritOptions(optionsBuilder.general, optionsBuilder.git) {
    @Override
    protected HttpTransport getHttpTransport() {
      return mockHttpTransport;
    }

    @Override
    protected GitRepository getCredentialsRepo() throws RepoException {
      return credentialsRepo != null ? credentialsRepo : super.getCredentialsRepo();
    }
  };
}
 

public void doGet(HttpServletRequest req, HttpServletResponse resp)
		throws IOException {
	resp.setContentType("text/plain");
	resp.getWriter().println("Hello, world");

					
	HttpTransport httpTransport = new UrlFetchTransport();        
	JacksonFactory jsonFactory = new JacksonFactory();

	AppIdentityService appIdentity = AppIdentityServiceFactory.getAppIdentityService();    
	AppIdentityService.GetAccessTokenResult accessToken = appIdentity.getAccessToken(Arrays.asList(Oauth2Scopes.USERINFO_EMAIL));         
	GoogleCredential credential = new GoogleCredential.Builder()
		.setTransport(httpTransport)
		.setJsonFactory(jsonFactory).build();
    credential.setAccessToken(accessToken.getAccessToken());
	
	Oauth2 service = new Oauth2.Builder(httpTransport, jsonFactory, credential)
	    .setApplicationName("oauth client").build();

	Userinfoplus ui = service.userinfo().get().execute(); 
	resp.getWriter().println(ui.getEmail());
    
	  // Using Google Cloud APIs

	  Storage storage_service = StorageOptions.newBuilder()
		.build()
		.getService();	
	  for (Bucket b : storage_service.list().iterateAll()){
		  System.out.println(b);
	  }
	  
}