How do I implement OAuth in a Flask application?

How do I implement OAuth in a Flask application?

To implement OAuth in a Flask application, you can use the Flask-Dance library. It simplifies the process of integrating OAuth providers.

What are the steps to set up Flask-Dance?

First, install Flask-Dance using pip. Then, create a blueprint for your OAuth provider and configure it with your client ID and secret.

Can you show me a code example?

Sure! Here's a basic example:

from flask import Flask, redirect, url_for
from flask_dance.contrib.google import make_google_blueprint, google

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

google_bp = make_google_blueprint(client_id='your_client_id', client_secret='your_client_secret', redirect_to='google_login')
app.register_blueprint(google_bp, url_prefix='/google_login')

@app.route('/')
def index():
    return 'Welcome!'

@app.route('/google')
def google_login():
    if not google.authorized:
        return redirect(url_for('google.login'))
    return 'You are logged in!'

if __name__ == '__main__':
    app.run(debug=True)

What if I want to use a different OAuth provider?

You can use Flask-Dance with various providers like GitHub, Facebook, or Twitter. Just import the corresponding blueprint and configure it similarly.