flask-dance google oauth2.0

userauth.py

from flask import Blueprint, redirect, url_for, session
from flask_dance.contrib.google import make_google_blueprint, google
from flask_dance.consumer.backend.sqla import SQLAlchemyBackend
from flask_login import current_user, login_user, logout_user
from flask_dance.consumer import oauth_authorized
from sqlalchemy.orm.exc import NoResultFound
from oauthlib.oauth2.rfc6749.errors import InvalidClientIdError
from itemcatalog import app, db, user

userauth = Blueprint('userauth', __name__)

app.secret_key = app.config['GOOGLE_OAUTH_CLIENT_SECRET']

google_blueprint = make_google_blueprint(
    client_id=app.config['GOOGLE_OAUTH_CLIENT_ID'],
    client_secret=app.secret_key,
    scope=app.config['GOOGLE_OAUTH_CLIENT_SCOPE'],
    offline=True
    )

google_blueprint.backend = SQLAlchemyBackend(user.UserAuth, db.session,
                                             user=current_user,
                                             user_required=False)

app.register_blueprint(google_blueprint, url_prefix="/google_login")


@userauth.route("/google_login")
def google_login():
    if not google.authorized:
        return redirect(url_for("google.login"))
    resp = google.get("/oauth2/v2/userinfo")
    assert resp.ok, resp.text
    return resp.text


@oauth_authorized.connect_via(google_blueprint)
def google_logged_in(blueprint, token):
    from itemcatalog import user
    User = user.User
    resp = blueprint.session.get("/oauth2/v2/userinfo")
    if resp.ok:
        account_info_json = resp.json()
        email = account_info_json['email']
        query = User.query.filter_by(email=email)

        try:
            user = query.one()
        except NoResultFound:
            user = User()
            user.name = account_info_json['name']
            user.email = account_info_json['email']
            db.session.add(user)
            db.session.commit()
        login_user(user, remember=True)


@userauth.route('/google_logout')
def google_logout():
    """Revokes token and empties session."""
    if google.authorized:
        try:
            google.get(
                'https://accounts.google.com/o/oauth2/revoke',
                params={
                    'token':
                    google.token['access_token']},
            )
        except InvalidClientIdError:  # token expiration
            del google.token
            redirect(url_for('main.index'))
    session.clear()
    logout_user()
    return redirect(url_for('main.index'))

Hi,

what is itemcatalog in this case?

Thanks!