Retrieve changes

import com.google.api.client.googleapis.json.GoogleJsonResponseException; import com.google.api.client.http.HttpRequestInitializer; import com.google.api.client.http.javanet.NetHttpTransport; import com.google.api.client.json.gson.GsonFactory; import com.google.api.services.drive.Drive; import com.google.api.services.drive.DriveScopes; import com.google.api.services.drive.model.StartPageToken; import com.google.auth.http.HttpCredentialsAdapter; import com.google.auth.oauth2.GoogleCredentials; import java.io.IOException; import java.util.Arrays; /* Class to demonstrate use-case of Drive's fetch start page token */ public class FetchStartPageToken {  /**  * Retrieve the start page token for the first time.  *  * @return Start page token as String.  * @throws IOException if file is not found  */  public static String fetchStartPageToken() throws IOException {  /*Load pre-authorized user credentials from the environment.  TODO(developer) - See https://developers.google.com/identity for  guides on implementing OAuth2 for your application. */  GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()  .createScoped(Arrays.asList(DriveScopes.DRIVE_FILE));  HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(  credentials);  // Build a new authorized API client service.  Drive service = new Drive.Builder(new NetHttpTransport(),  GsonFactory.getDefaultInstance(),  requestInitializer)  .setApplicationName("Drive samples")  .build();  try {  StartPageToken response = service.changes()  .getStartPageToken().execute();  System.out.println("Start token: " + response.getStartPageToken());  return response.getStartPageToken();  } catch (GoogleJsonResponseException e) {  // TODO(developer) - handle error appropriately  System.err.println("Unable to fetch start page token: " + e.getDetails());  throw e;  }  } }

import google.auth from googleapiclient.discovery import build from googleapiclient.errors import HttpError def fetch_start_page_token():  """Retrieve page token for the current state of the account.  Returns & prints : start page token  Load pre-authorized user credentials from the environment.  TODO(developer) - See https://developers.google.com/identity  for guides on implementing OAuth2 for the application.  """ creds, _ = google.auth.default() try: # create drive api client service = build("drive", "v3", credentials=creds) # pylint: disable=maybe-no-member response = service.changes().getStartPageToken().execute() print(f'Start token: {response.get("startPageToken")}') except HttpError as error: print(f"An error occurred: {error}") response = None return response.get("startPageToken") if __name__ == "__main__": fetch_start_page_token()

<?php use Google\Client; use Google\Service\Drive; # TODO - PHP client currently chokes on fetching start page token function fetchStartPageToken() {  try {  $client = new Client();  $client->useApplicationDefaultCredentials();  $client->addScope(Drive::DRIVE);  $driveService = new Drive($client);  $response = $driveService->changes->getStartPageToken();  printf("Start token: %s\n", $response->startPageToken);  return $response->startPageToken;  } catch(Exception $e) {  echo "Error Message: ".$e;  } }

using Google.Apis.Auth.OAuth2; using Google.Apis.Drive.v3; using Google.Apis.Services; namespace DriveV3Snippets {  // Class to demonstrate use-case of Drive's fetch start page token  public class FetchStartPageToken  {  /// <summary>  /// Retrieve the starting page token.  /// </summary>  /// <returns>start page token as String, null otherwise.</returns>  public static string DriveFetchStartPageToken()  {  try  {  /* Load pre-authorized user credentials from the environment.  TODO(developer) - See https://developers.google.com/identity for  guides on implementing OAuth2 for your application. */  GoogleCredential credential = GoogleCredential.GetApplicationDefault()  .CreateScoped(DriveService.Scope.Drive);  // Create Drive API service.  var service = new DriveService(new BaseClientService.Initializer  {  HttpClientInitializer = credential,  ApplicationName = "Drive API Snippets"  });  var response = service.Changes.GetStartPageToken().Execute();  // Prints the token value.  Console.WriteLine("Start token: " + response.StartPageTokenValue);  return response.StartPageTokenValue;  }  catch (Exception e)  {  // TODO(developer) - handle error appropriately  if (e is AggregateException)  {  Console.WriteLine("Credential Not found");  }  else  {  throw;  }  }  return null;  }  } }

import {GoogleAuth} from 'google-auth-library'; import {google} from 'googleapis'; /**  * Fetches the start page token for the current state of the account.  * @return {Promise<string>} The start page token.  */ async function fetchStartPageToken() {  // Authenticate with Google and get an authorized client.  // TODO (developer): Use an appropriate auth mechanism for your app.  const auth = new GoogleAuth({  scopes: 'https://www.googleapis.com/auth/drive.appdata',  });  // Create a new Drive API client (v3).  const service = google.drive({version: 'v3', auth});  // Fetch the start page token.  const res = await service.changes.getStartPageToken({});  const token = res.data.startPageToken;  console.log('start token: ', token);  if (!token) {  throw new Error('Start page token not found.');  }  return token; }

import com.google.api.client.googleapis.json.GoogleJsonResponseException; import com.google.api.client.http.HttpRequestInitializer; import com.google.api.client.http.javanet.NetHttpTransport; import com.google.api.client.json.gson.GsonFactory; import com.google.api.services.drive.Drive; import com.google.api.services.drive.DriveScopes; import com.google.api.services.drive.model.ChangeList; import com.google.auth.http.HttpCredentialsAdapter; import com.google.auth.oauth2.GoogleCredentials; import java.io.IOException; import java.util.Arrays; /* Class to demonstrate use-case of Drive's fetch changes in file. */ public class FetchChanges {  /**  * Retrieve the list of changes for the currently authenticated user.  *  * @param savedStartPageToken Last saved start token for this user.  * @return Saved token after last page.  * @throws IOException if file is not found  */  public static String fetchChanges(String savedStartPageToken) throws IOException {  /*Load pre-authorized user credentials from the environment.  TODO(developer) - See https://developers.google.com/identity for  guides on implementing OAuth2 for your application.*/  GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()  .createScoped(Arrays.asList(DriveScopes.DRIVE_FILE));  HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(  credentials);  // Build a new authorized API client service.  Drive service = new Drive.Builder(new NetHttpTransport(),  GsonFactory.getDefaultInstance(),  requestInitializer)  .setApplicationName("Drive samples")  .build();  try {  // Begin with our last saved start token for this user or the  // current token from getStartPageToken()  String pageToken = savedStartPageToken;  while (pageToken != null) {  ChangeList changes = service.changes().list(pageToken)  .execute();  for (com.google.api.services.drive.model.Change change : changes.getChanges()) {  // Process change  System.out.println("Change found for file: " + change.getFileId());  }  if (changes.getNewStartPageToken() != null) {  // Last page, save this token for the next polling interval  savedStartPageToken = changes.getNewStartPageToken();  }  pageToken = changes.getNextPageToken();  }  return savedStartPageToken;  } catch (GoogleJsonResponseException e) {  // TODO(developer) - handle error appropriately  System.err.println("Unable to fetch changes: " + e.getDetails());  throw e;  }  } }

import google.auth from googleapiclient.discovery import build from googleapiclient.errors import HttpError def fetch_changes(saved_start_page_token):  """Retrieve the list of changes for the currently authenticated user.  prints changed file's ID  Args:  saved_start_page_token : StartPageToken for the current state of the  account.  Returns: saved start page token.  Load pre-authorized user credentials from the environment.  TODO(developer) - See https://developers.google.com/identity  for guides on implementing OAuth2 for the application.  """ creds, _ = google.auth.default() try: # create drive api client service = build("drive", "v3", credentials=creds) # Begin with our last saved start token for this user or the # current token from getStartPageToken() page_token = saved_start_page_token # pylint: disable=maybe-no-member while page_token is not None: response = ( service.changes().list(pageToken=page_token, spaces="drive").execute() ) for change in response.get("changes"): # Process change print(f'Change found for file: {change.get("fileId")}') if "newStartPageToken" in response: # Last page, save this token for the next polling interval saved_start_page_token = response.get("newStartPageToken") page_token = response.get("nextPageToken") except HttpError as error: print(f"An error occurred: {error}") saved_start_page_token = None return saved_start_page_token if __name__ == "__main__": # saved_start_page_token is the token number fetch_changes(saved_start_page_token=209)

<?php use Google\Client; use Google\Service\Drive; # TODO - PHP client currently chokes on fetching start page token function fetchChanges() {  try {  $client = new Client();  $client->useApplicationDefaultCredentials();  $client->addScope(Drive::DRIVE);  $driveService = new Drive($client);  # Begin with our last saved start token for this user or the  # current token from getStartPageToken()  $savedStartPageToken = readLine("Enter Start Page Token: ");  $pageToken = $savedStartPageToken;  while ($pageToken != null) {  $response = $driveService->changes->listChanges($pageToken, array(  'spaces' => 'drive'  ));  foreach ($response->changes as $change) {  // Process change  printf("Change found for file: %s", $change->fileId);  }  if ($response->newStartPageToken != null) {  // Last page, save this token for the next polling interval  $savedStartPageToken = $response->newStartPageToken;  }  $pageToken = $response->nextPageToken;  }  echo $savedStartPageToken;  } catch(Exception $e) {  echo "Error Message: ".$e;  } } require_once 'vendor/autoload.php';

using Google.Apis.Auth.OAuth2; using Google.Apis.Drive.v3; using Google.Apis.Services; namespace DriveV3Snippets {  // Class to demonstrate use-case of Drive's fetch changes in file.  public class FetchChanges  {  /// <summary>  /// Retrieve the list of changes for the currently authenticated user.  /// prints changed file's ID  /// </summary>  /// <param name="savedStartPageToken">last saved start token for this user.</param>  /// <returns>saved token for the current state of the account, null otherwise.</returns>  public static string DriveFetchChanges(string savedStartPageToken)  {  try  {  /* Load pre-authorized user credentials from the environment.  TODO(developer) - See https://developers.google.com/identity for  guides on implementing OAuth2 for your application. */  GoogleCredential credential = GoogleCredential.GetApplicationDefault()  .CreateScoped(DriveService.Scope.Drive);  // Create Drive API service.  var service = new DriveService(new BaseClientService.Initializer  {  HttpClientInitializer = credential,  ApplicationName = "Drive API Snippets"  });  // Begin with our last saved start token for this user or the  // current token from GetStartPageToken()  string pageToken = savedStartPageToken;  while (pageToken != null)  {  var request = service.Changes.List(pageToken);  request.Spaces = "drive";  var changes = request.Execute();  foreach (var change in changes.Changes)  {  // Process change  Console.WriteLine("Change found for file: " + change.FileId);  }  if (changes.NewStartPageToken != null)  {  // Last page, save this token for the next polling interval  savedStartPageToken = changes.NewStartPageToken;  }  pageToken = changes.NextPageToken;  }  return savedStartPageToken;  }  catch (Exception e)  {  // TODO(developer) - handle error appropriately  if (e is AggregateException)  {  Console.WriteLine("Credential Not found");  }  else  {  throw;  }  }  return null;  }  } }

import {GoogleAuth} from 'google-auth-library'; import {google} from 'googleapis'; /**  * Fetches the list of changes for the currently authenticated user.  * @param {string} savedStartPageToken The page token obtained from `fetch_start_page_token.js`.  */ async function fetchChanges(savedStartPageToken) {  // Authenticate with Google and get an authorized client.  // TODO (developer): Use an appropriate auth mechanism for your app.  const auth = new GoogleAuth({  scopes: 'https://www.googleapis.com/auth/drive.readonly',  });  // Create a new Drive API client (v3).  const service = google.drive({version: 'v3', auth});  // The page token for the next page of changes.  let pageToken = savedStartPageToken;  // Loop to fetch all changes, handling pagination.  do {  const result = await service.changes.list({  pageToken: savedStartPageToken,  fields: '*',  });  // Process the changes.  (result.data.changes ?? []).forEach((change) => {  console.log('change found for file: ', change.fileId);  });  // Update the page token for the next iteration.  pageToken = result.data.newStartPageToken ?? '';  } while (pageToken); }