How do I use Flask-OAuthlib for authentication?

How do I use Flask-OAuthlib for authentication?

Flask-OAuthlib is a great library for adding OAuth support to your Flask applications. Do you need help with a specific OAuth provider?

Yes, I want to integrate Google OAuth. What steps should I follow?

First, you'll need to create a project in the Google Developer Console and obtain your client ID and secret. Then, you can set up Flask-OAuthlib in your Flask app.

Can you show me a code example for that?

Sure! Here's a basic example:

from flask import Flask, redirect, url_for
from flask_oauthlib.client import OAuth

app = Flask(__name__)
app.secret_key = 'random_secret_key'

oauth = OAuth(app)

google = oauth.remote_app(
    'google',
    consumer_key='YOUR_CLIENT_ID',
    consumer_secret='YOUR_CLIENT_SECRET',
    request_token_params={
        'scope': 'email',
    },
    base_url='https://www.googleapis.com/oauth2/v1/',
    request_token_url=None,
    access_token_method='POST',
    access_token_url='https://accounts.google.com/o/oauth2/token',
    authorize_url='https://accounts.google.com/o/oauth2/auth',
)

@app.route('/login')
def login():
    return google.authorize(callback=url_for('authorized', _external=True))

@app.route('/logout')
def logout():
    # Handle logout
    pass

@app.route('/login/authorized')
def authorized():
    response = google.get('userinfo')
    # Handle the response
    return response.data

Make sure to replace 'YOUR_CLIENT_ID' and 'YOUR_CLIENT_SECRET' with your actual credentials.