How to get delegated credentials objects for invoking google apis? - python

I am trying to fetch gsuite alerts via API. I have created a service account as per their docs and I have assigned that service account to my google cloud function.
I do not want to use environment variables or upload credentials along with source code but I want leverage default service account used by function.
from googleapiclient.discovery import build
def get_credentials():
# if one knows credentials file location(when one uploads the json credentials file or specify them in environment variable) one can easily get the credentials by specify the path.
# In case of google cloud functions atleast I couldn't find it the path as the GOOGLE_APPLICATION_CREDENTIALS is empty in python runtime
# the below code work find if one uncomments the below line
#credentials = ServiceAccountCredentials.from_json_keyfile_name(key_file_location)
credentials = < how to get default credentials object for default service account?>
delegated_credentials = credentials.create_delegated('admin#alertcenter1.bigr.name').create_scoped(SCOPES)
return delegated_credentials
def get_alerts(api_name, api_version, key_file_location=None):
delegated_credentials = get_credentials()
alertcli = build(api_name, api_version, credentials=delegated_credentials)
resp = alertcli.alerts().list(pageToken=None).execute()
print(resp)
Is there any way I can create a default credentials object. I have tried using
from google.auth import credentials but this does not contain create_delegated function and
I have also tried ServiceAccountCredentials() but this requires signer.

Here is an example to use the Gmail API with delegated credentials. The service account credentials will need "Enable G Suite Domain-wide Delegation" enabled.
from google.oauth2 import service_account
from googleapiclient.discovery import build
credentials = service_account.Credentials.from_service_account_file(
credentials_file,
scopes=['https://www.googleapis.com/auth/gmail.send'])
impersonate = 'username#example.com'
credentials = credentials.with_subject(impersonate)
service = build('gmail', 'v1', credentials=credentials)

You can use the google.auth.default function to get the default credentials and use them to make an IAM signer which can be used to create new service account credentials which has the delegated email adress as subject. I have a more detailed answer for a similar question.
There is also Google Cloud Platform Github repository with some documentation about this method.

Related

How to access accountUserLinks in the Google Analtyics managment api with python?

I'm looking for the library for this method
analytics.management().accountUserLinks().insert
everytime I try to run it the error is always the same, the method management() doesn't exists into the analytics library.
I've got this from the documentation so I think it should works.
I've tried to download different python libraries without success.
The Google analytics management api. Is part of the Google apis library.
Which means you can use the google-api-python-client
sudo pip install --upgrade google-api-python-client
sample
"""A simple example of how to access the Google Analytics API."""
import argparse
from googleapiclient.discovery import build
import httplib2
from oauth2client import client
from oauth2client import file
from oauth2client import tools
# If modifying these scopes, delete the file token.json.
SCOPES = ['https://www.googleapis.com/auth/analytics.readonly', 'https://www.googleapis.com/auth/analytics.manage.users.readonly']
# Service account key file
CREDENTIALS = 'C:\YouTube\dev\credentials.json'
VIEW_ID = '78110423'
def get_service(api_name, api_version, scope, client_secrets_path):
"""Get a service that communicates to a Google API.
Args:
api_name: string The name of the api to connect to.
api_version: string The api version to connect to.
scope: A list of strings representing the auth scopes to authorize for the
connection.
client_secrets_path: string A path to a valid client secrets file.
Returns:
A service that is connected to the specified API.
"""
# Parse command-line arguments.
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
parents=[tools.argparser])
flags = parser.parse_args([])
# Set up a Flow object to be used if we need to authenticate.
flow = client.flow_from_clientsecrets(
client_secrets_path, scope=scope,
message=tools.message_if_missing(client_secrets_path))
# Prepare credentials, and authorize HTTP object with them.
# If the credentials don't exist or are invalid run through the native client
# flow. The Storage object will ensure that if successful the good
# credentials will get written back to a file.
storage = file.Storage(api_name + '.dat')
credentials = storage.get()
if credentials is None or credentials.invalid:
credentials = tools.run_flow(flow, storage, flags)
http = credentials.authorize(http=httplib2.Http())
# Build the service object.
service = build(api_name, api_version, http=http)
return service
def get_first_profile_id(service):
# Use the Analytics service object to get the first profile id.
# Get a list of all Google Analytics accounts for the authorized user.
accounts = service.management().accounts().list().execute()
if accounts.get('items'):
# Get the first Google Analytics account.
account = accounts.get('items')[0].get('id')
account_links = service.management().accountUserLinks().list(
accountId=account
).execute()
if account_links.get('items', []):
# return the first view (profile) id.
return account_links.get('items', [])
return None
def print_results(results):
print(results)
def main():
# Authenticate and construct service.
service = get_service('analytics', 'v3', SCOPES, CREDENTIALS)
profile = get_first_profile_id(service)
print_results(profile)
if __name__ == '__main__':
main()

How to authenticate to Gmail API in GCP environment without explicitly referring to a service account file or info

I am writing a script that will authenticate to the Gmail API, pull some emails and transform some email data. I can get this working locally since I have the service account file which I am creating a credentials object from and then referencing in the Gmail API, however since this will be running in Google Cloud Product (GCP) the credentials are stored in the environment.
I need to somehow either modify the code to not reference credentials or retrieve a credentials object in the environment.
The code below works locally, however where I am creating the credentials object, I either need to retrieve that from the environment or authenticate in a different way when creating the delegated_credentials and service objects.
from googleapiclient.discovery import build
from google.oauth2 import service_account
SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']
SERVICE_ACCOUNT_FILE = 'secret.json'
credentials = service_account.Credentials.from_service_account_file(
SERVICE_ACCOUNT_FILE, scopes=SCOPES)
delegated_credentials = credentials.with_subject('someone#gmail.com')
service = build('gmail', 'v1', credentials=delegated_credentials)
As an example, when using the google cloud storage API, I create the client in GCP as follow:
storage_client = storage.Client()

Python script for google drive is redirecting to chrome authentication

I write a python script to upload file to google drive, but the script is redirecting to chrome for email user authentication.
is there any way to avoid redirecting to chrome for authentication.
I'm running on python 3.9.
here is my sample code:
from pydrive.auth import GoogleAuth
from pydrive.drive import GoogleDrive
gauth = GoogleAuth()
drive = GoogleDrive(gauth)
upload_file_list = ['myfile.pdf']
for upload_file in upload_file_list:
gfile = drive.CreateFile({'parents': [{'id': '1B8ttlQMRUkjbrscevfa1DablIayzObh2'}]})
# Read file and set it as the content of this instance.
gfile.SetContentFile(upload_file)
gfile.Upload() # Upload the file.
The behaviour you are reporting is totally normal with OAuth 2.0 and the official Google APIs library.
What #Tanaike said is a good solution. You could use a service account to access Google Drive files without granting consent every time the token expires. With service accounts there are 2 options to achieve that:
Share the file/folder with the email address of the service account.
Use domain-wide delegation of authority to allow the service account to impersonate any user in your domain. Requires a domain using Google Workspace or Cloud Identity and Super Admin access to configure domain-wide delegation.
General information on how to make API calls with domain-wide delegation is available on this page https://developers.google.com/identity/protocols/oauth2/service-account#authorizingrequests.
Here is a working code sample:
from google.oauth2 import service_account
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
# Scopes required by this endpoint
# https://developers.google.com/drive/api/v3/reference/permissions/list
SCOPES = ["https://www.googleapis.com/auth/drive.readonly"]
# Variable that holds the file ID
DOCUMENT_ID = "i0321LSy8mmkx_Bw-XlDyzQ_b3Ny9m74u"
# Service account Credential file downloaded with domain-wide delegation of authority
# or with shared access to the file.
SERVICE_ACCOUNT_FILE = "serviceaccount.json";
# Creation of the credentials
credentials = service_account.Credentials.from_service_account_file(
SERVICE_ACCOUNT_FILE,
scopes=SCOPES)
# [Impersonation] the service account will take action on behalf of the user,
# requires domain-wide delegation of authority.
delegated_credentials = credentials.with_subject('user#domain.com')
# The API call is attempted
try:
service = build('drive', 'v3', credentials=delegated_credentials)
# Retrieve the documents contents from the Docs service.
document = service.files().get(fileId=DOCUMENT_ID).execute()
print('The title of the document is: {}'.format(document.get('name')))
except HttpError as err:
print(err)
Keep in mind that to use user impersonation you will need to configure domain-wide delegation in the Admin console of the domain that has the files (this will also work for external files shared with users in the domain).
If you want to use this with regular consumer accounts you can't use user impersonation, instead you will share the file with the service account (read or write access) to later make API calls. Line 20 creates delegated credentials, this line needs to be removed if you will use this other approach.

Google Directory API Python ETL

I'm trying to build a directory sync ETL for Google Workspace, but I'm getting 403's from the code snippet.
from google.oauth2 import service_account
from googleapiclient.discovery import build
SCOPES = ['https://www.googleapis.com/auth/admin.directory.user.readonly']
SERVICE_ACCOUNT_FILE = './credentials.json' #TODO: these creds need to be passed in more safely.
credentials = service_account.Credentials.from_service_account_file(
SERVICE_ACCOUNT_FILE, scopes=SCOPES)
service = build('admin', 'directory_v1', credentials=credentials)
results = service.users().list(domain='mydomain.com').execute()
users = results.get('users', [])
The service account has been given domain-wide delegation to the listed scope and should be able to access the API. Other similar posts have mentioned that a domain administrator must approve the request, but that doesn't make sense in the case where I need this to run multiple times a week without any administrator intervention.
Using the Users API requires the User Management Admin role (or an equivalent custom role). You can grant this role to a service account, then you won't need domain-wide delegation at all.

How do I authenticate the with the Google Storage SDK using a JSON service account key?

I'm having a look at the API reference located at:
https://googlecloudplatform.github.io/google-cloud-python/latest/storage/client.html
How am I meant to authenticate when using a service account? I don't see how to create the necessary Credentials object.
https://google-auth.readthedocs.io/en/stable/user-guide.html#service-account-private-key-files
from google.oauth2 import service_account
credentials = service_account.Credentials.from_service_account_file(
'/path/to/key.json')
scoped_credentials = credentials.with_scopes(
['https://www.googleapis.com/auth/cloud-platform'])

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