google_drive_api_list_files_with_oauth_authentication.py

1import os.path
2
3from google.auth.transport.requests import Request
4from google.oauth2.credentials import Credentials
5from google_auth_oauthlib.flow import InstalledAppFlow
6from googleapiclient.discovery import build
7from googleapiclient.errors import HttpError
8
9# If modifying these scopes, delete the file token.json.
10SCOPES = ["https://www.googleapis.com/auth/drive.metadata.readonly"]
11
12
13def main():
14  """Shows basic usage of the Drive v3 API.
15  Prints the names and ids of the first 10 files the user has access to.
16  """
17  creds = None
18  # The file token.json stores the user's access and refresh tokens, and is
19  # created automatically when the authorization flow completes for the first
20  # time.
21  if os.path.exists("token.json"):
22    creds = Credentials.from_authorized_user_file("token.json", SCOPES)
23  # If there are no (valid) credentials available, let the user log in.
24  if not creds or not creds.valid:
25    if creds and creds.expired and creds.refresh_token:
26      creds.refresh(Request())
27    else:
28      flow = InstalledAppFlow.from_client_secrets_file(
29          "credentials.json", SCOPES
30      )
31      creds = flow.run_local_server(port=0)
32    # Save the credentials for the next run
33    with open("token.json", "w") as token:
34      token.write(creds.to_json())
35
36  try:
37    service = build("drive", "v3", credentials=creds)
38
39    # Call the Drive v3 API
40    results = (
41        service.files()
42        .list(pageSize=10, fields="nextPageToken, files(id, name)")
43        .execute()
44    )
45    items = results.get("files", [])
46
47    if not items:
48      print("No files found.")
49      return
50    print("Files:")
51    for item in items:
52      print(f"{item['name']} ({item['id']})")
53  except HttpError as error:
54    # TODO(developer) - Handle errors from drive API.
55    print(f"An error occurred: {error}")
56
57
58if __name__ == "__main__":
59  main()