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JC Chouinard > API - Google Search Console - Python > Authorise Requests to GSC API Using OAuth 2.0
By jean-christophe-chouinard 2 novembre 2020

Authorise Requests to GSC API Using OAuth 2.0

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This post is part of the Guide on Google Search Console API

In this post, I will show you the function that I created to authorise requests to the Google Search Console API using OAuth 2.0.

To run this, you will need to get a client_secrets.json file with your credentials. Check out how you can get Google Search Console OAuth Credentials.

Import Libraries

To run the OAuth 2.0 authentication you will need to install and import all those libraries.

Alternatively, you can clone the Github Repository that I made and run:

$ pip install -r requirements.txt

import argparse
import httplib2
import requests

from collections import defaultdict
from dateutil import relativedelta
from googleapiclient.discovery import build
from oauth2client import client
from oauth2client import file
from oauth2client import tools

Define OAuth Function

The authorize_creds() function will check the credentials file and define a .dat file to save authorised credentials so you don’t have to go through the login process each time.

def authorize_creds(creds,authorizedcreds='authorizedcreds.dat'):
    '''
    Authorize credentials using OAuth2.
    '''
    print('Authorizing Creds')
    # Variable parameter that controls the set of resources that the access token permits.
    SCOPES = ['https://www.googleapis.com/auth/webmasters.readonly'] 

    # Path to client_secrets.json file
    CLIENT_SECRETS_PATH = creds

    # Create a parser to be able to open browser for Authorization
    parser = argparse.ArgumentParser(
        formatter_class=argparse.RawDescriptionHelpFormatter,
        parents=[tools.argparser])
    flags = parser.parse_args([])

    # Creates an authorization flow from a clientsecrets file.
    # Will raise InvalidClientSecretsError for unknown types of Flows.
    flow = client.flow_from_clientsecrets(
        CLIENT_SECRETS_PATH, scope = SCOPES,
        message = tools.message_if_missing(CLIENT_SECRETS_PATH))

    # Prepare credentials and authorize HTTP
    # If they exist, get them from the storage object
    # credentials will get written back to the 'authorizedcreds.dat' file.
    storage = file.Storage(authorizedcreds)
    credentials = storage.get()

    # If authenticated credentials don't exist, open Browser to authenticate
    if credentials is None or credentials.invalid:
        credentials = tools.run_flow(flow, storage, flags)      # Add the valid creds to a variable

    # Take the credentials and authorize them using httplib2   
    http = httplib2.Http()                                      # Creates an HTTP client object to make the http request
    http = credentials.authorize(http=http)                     # Sign each request from the HTTP client with the OAuth 2.0 access token
    webmasters_service = build('webmasters', 'v3', http=http)   # Construct a Resource to interact with the API using the Authorized HTTP Client.

    print('Auth Successful')
    return webmasters_service

Run OAuth 2.0

To run the code, simply add your credentials and run authorize_creds(). Once this is done you will be able to run Google Search Console API using the webmasters_service variable.

if __name__ == '__main__':
    creds = 'client_secrets.json'
    webmasters_service = authorize_creds(creds)

The if name equals main line checks whether you are running the module or importing it. If you are importing it, authorize_creds() will not run.

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Run a simple GSC API Call

You can try to get verified properties to check whether the authentication with OAuth 2.0 worked or not.

def get_property_list(webmasters_service):
    '''
    Get a list of validated properties from GSC
    '''
    site_list = webmasters_service.sites().list().execute()

    # Filter for verified websites
    verified_sites_urls = [s['siteUrl'] for s in site_list['siteEntry']
                        if s['permissionLevel'] != 'siteUnverifiedUser'
                            and s['siteUrl'][:4] == 'http']
    return verified_sites_urls

verified_sites_urls = get_property_list(webmasters_service)

The code above comes from the post “How to extract Verified Properties using Google Search Console API and Python“.

Full Code

You can also get the full code on Github.

import argparse
import httplib2
import requests

from collections import defaultdict
from dateutil import relativedelta
from googleapiclient.discovery import build
from oauth2client import client
from oauth2client import file
from oauth2client import tools

def authorize_creds(creds,authorizedcreds='authorizedcreds.dat'):
    '''
    Authorize credentials using OAuth2.
    '''
    print('Authorizing Creds')
    # Variable parameter that controls the set of resources that the access token permits.
    SCOPES = ['https://www.googleapis.com/auth/webmasters.readonly'] 

    # Path to client_secrets.json file
    CLIENT_SECRETS_PATH = creds

    # Create a parser to be able to open browser for Authorization
    parser = argparse.ArgumentParser(
        formatter_class=argparse.RawDescriptionHelpFormatter,
        parents=[tools.argparser])
    flags = parser.parse_args([])

    # Creates an authorization flow from a clientsecrets file.
    # Will raise InvalidClientSecretsError for unknown types of Flows.
    flow = client.flow_from_clientsecrets(
        CLIENT_SECRETS_PATH, scope = SCOPES,
        message = tools.message_if_missing(CLIENT_SECRETS_PATH))

    # Prepare credentials and authorize HTTP
    # If they exist, get them from the storage object
    # credentials will get written back to the 'authorizedcreds.dat' file.
    storage = file.Storage(authorizedcreds)
    credentials = storage.get()

    # If authenticated credentials don't exist, open Browser to authenticate
    if credentials is None or credentials.invalid:
        credentials = tools.run_flow(flow, storage, flags)      # Add the valid creds to a variable

    # Take the credentials and authorize them using httplib2   
    http = httplib2.Http()                                      # Creates an HTTP client object to make the http request
    http = credentials.authorize(http=http)                     # Sign each request from the HTTP client with the OAuth 2.0 access token
    webmasters_service = build('webmasters', 'v3', http=http)   # Construct a Resource to interact with the API using the Authorized HTTP Client.

    print('Auth Successful')
    return webmasters_service

if __name__ == '__main__':
    creds = 'client_secrets.json'
    webmasters_service = authorize_creds(creds)

Further Considerations

I just stumbled on this video helping understanding the risks of OAuth. In time, I will update it to add CSRF tokens.

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For now, here you go for your own interest.

Here you go, you are now authenticated to authorize Requests to the Google Search Console API. Check the full guide on Python for SEO if you want to learn more Python SEO trick.