126 lines
3.9 KiB
Python
126 lines
3.9 KiB
Python
from flask import request, session, redirect, flash, url_for
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from requests_oauthlib import OAuth2Session
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from app import s3
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from app.auth.base import auth_bp
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from app.config import URL, GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET
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from app.db import Session
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from app.log import LOG
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from app.models import User, File, SocialAuth
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from app.utils import random_string, sanitize_email
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from .login_utils import after_login
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_authorization_base_url = "https://accounts.google.com/o/oauth2/v2/auth"
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_token_url = "https://www.googleapis.com/oauth2/v4/token"
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_scope = [
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"https://www.googleapis.com/auth/userinfo.email",
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"https://www.googleapis.com/auth/userinfo.profile",
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"openid",
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]
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# need to set explicitly redirect_uri instead of leaving the lib to pre-fill redirect_uri
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# when served behind nginx, the redirect_uri is localhost... and not the real url
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_redirect_uri = URL + "/auth/google/callback"
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@auth_bp.route("/google/login")
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def google_login():
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# to avoid flask-login displaying the login error message
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session.pop("_flashes", None)
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next_url = request.args.get("next")
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# Google does not allow to append param to redirect_url
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# we need to pass the next url by session
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if next_url:
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session["google_next_url"] = next_url
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google = OAuth2Session(GOOGLE_CLIENT_ID, scope=_scope, redirect_uri=_redirect_uri)
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authorization_url, state = google.authorization_url(_authorization_base_url)
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# State is used to prevent CSRF, keep this for later.
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session["oauth_state"] = state
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return redirect(authorization_url)
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@auth_bp.route("/google/callback")
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def google_callback():
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# user clicks on cancel
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if "error" in request.args:
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flash("please use another sign in method then", "warning")
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return redirect("/")
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google = OAuth2Session(
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GOOGLE_CLIENT_ID,
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# some how Google Login fails with oauth_state KeyError
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# state=session["oauth_state"],
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scope=_scope,
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redirect_uri=_redirect_uri,
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)
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google.fetch_token(
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_token_url,
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client_secret=GOOGLE_CLIENT_SECRET,
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authorization_response=request.url,
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)
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# Fetch a protected resource, i.e. user profile
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# {
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# "email": "abcd@gmail.com",
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# "family_name": "First name",
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# "given_name": "Last name",
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# "id": "1234",
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# "locale": "en",
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# "name": "First Last",
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# "picture": "http://profile.jpg",
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# "verified_email": true
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# }
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google_user_data = google.get(
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"https://www.googleapis.com/oauth2/v1/userinfo"
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).json()
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email = sanitize_email(google_user_data["email"])
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user = User.get_by(email=email)
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picture_url = google_user_data.get("picture")
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if user:
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if picture_url and not user.profile_picture_id:
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LOG.d("set user profile picture to %s", picture_url)
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file = create_file_from_url(user, picture_url)
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user.profile_picture_id = file.id
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Session.commit()
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else:
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flash(
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"Sorry you cannot sign up via Google, please use email/password sign-up instead",
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"error",
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)
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return redirect(url_for("auth.register"))
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next_url = None
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# The activation link contains the original page, for ex authorize page
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if "google_next_url" in session:
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next_url = session["google_next_url"]
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LOG.d("redirect user to %s", next_url)
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# reset the next_url to avoid user getting redirected at each login :)
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session.pop("google_next_url", None)
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if not SocialAuth.get_by(user_id=user.id, social="google"):
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SocialAuth.create(user_id=user.id, social="google")
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Session.commit()
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return after_login(user, next_url)
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def create_file_from_url(user, url) -> File:
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file_path = random_string(30)
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file = File.create(path=file_path, user_id=user.id)
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s3.upload_from_url(url, file_path)
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Session.flush()
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LOG.d("upload file %s to s3", file)
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return file
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