HTTP Basic Authorization with Flask and Flask-Login

flask_login_basic_auth.py

# Flask, http://flask.pocoo.org/
# Flask-Login, https://github.com/maxcountryman/flask-login

@app.before_request
def basic_authorize():
    auth = request.authorization
    if not current_user.is_active() and auth and auth.type == 'basic':
        # change to your specific call to get the user based off username and password
        # you're hopefully bcrypting your password, so fetch by username then check password :)
        user = User.get_login_user(unicode(auth.username), unicode(auth.password))
        if user is not None:
            login_user(user)
        else:
            return 'The provided username and password are invalid.', 403

https://flask-login.readthedocs.io/en/latest/#custom-login-using-request-loader