[파이썬] Flask-OAuth 확장

06 Sep 2023

flask

OAuth is an open standard for authorization that enables users to grant third-party applications access to their resources without sharing credentials. Flask-OAuth is a powerful and flexible extension for the Flask web framework that simplifies the process of integrating OAuth authentication with your Flask applications.

Getting Started

To use Flask-OAuth in your Python Flask application, you need to follow these steps:

Install Flask-OAuth using pip:

$ pip install Flask-OAuth

Import the necessary modules:

from flask import Flask, redirect, url_for
from flask_oauth import OAuth

Initialize the Flask application and configure the OAuth provider:

app = Flask(__name__)
app.config['SECRET_KEY'] = 'your_secret_key'

oauth = OAuth(app)

oauth_provider = oauth.remote_app(
    'provider_name',
    consumer_key='your_consumer_key',
    consumer_secret='your_consumer_secret',
    request_token_params={'scope': 'scope_of_access'},
    base_url='https://provider-api.com',
    request_token_url=None,
    access_token_method='POST',
    access_token_url='https://provider-access-token-endpoint.com',
    authorize_url='https://provider-authorization-endpoint.com'
)

Replace 'provider_name', 'your_consumer_key', 'your_consumer_secret', 'scope_of_access', and the URLs with the appropriate values for your OAuth provider.

Define the routes for authentication:

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

@app.route('/callback')
def authorized():
    resp = oauth_provider.authorized_response()
    if resp is None:
        return 'Access denied: reason={0} error={1}'.format(request.args['error_reason'], request.args['error_description'])

    access_token = resp['access_token']
    # Store the access token securely or use it to make API calls
    return 'Access token received: {0}'.format(access_token)

Implement the necessary functions for OAuth authentication:

@oauth_provider.tokengetter
def get_oauth_token():
    # Implement the function to retrieve the access token from your storage
    return stored_access_token

@oauth_provider.after_request
def inject_access_token(response):
    # Inject the access token to the response for future requests
    response.data += access_token
    return response

Conclusion

Flask-OAuth is a powerful tool that allows you to easily integrate OAuth authentication with your Flask applications. With Flask-OAuth, you can quickly and securely add OAuth functionality to your web applications without needing to handle complicated authentication flows manually.

By following the steps outlined in this blog post, you can get started with Flask-OAuth in your Python Flask applications and start using OAuth authentication with ease.