144 lines
4.5 KiB
Python
144 lines
4.5 KiB
Python
from flask import request, session, redirect, flash, url_for
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from flask_login import login_user
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from requests_oauthlib import OAuth2Session
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from app import s3, email_utils
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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, DISABLE_REGISTRATION
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from app.extensions import db
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from app.log import LOG
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from app.models import User, File
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from app.utils import random_string
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from .login_utils import after_login
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from ...email_utils import can_be_used_as_personal_email
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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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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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token = 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 = 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(picture_url)
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user.profile_picture_id = file.id
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db.session.commit()
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# create user
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else:
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if DISABLE_REGISTRATION:
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flash("Registration is closed", "error")
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return redirect(url_for("auth.login"))
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if not can_be_used_as_personal_email(email):
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flash(
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f"You cannot use {email} as your personal inbox.", "error",
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)
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return redirect(url_for("auth.login"))
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LOG.d("create google user with %s", google_user_data)
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user = User.create(
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email=email.lower(), name=google_user_data["name"], activated=True
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)
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if picture_url:
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LOG.d("set user profile picture to %s", picture_url)
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file = create_file_from_url(picture_url)
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user.profile_picture_id = file.id
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db.session.commit()
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login_user(user)
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email_utils.send_welcome_email(user.email, user.name)
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flash(f"Welcome to SimpleLogin {user.name}!", "success")
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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.debug("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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return after_login(user, next_url)
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def create_file_from_url(url) -> File:
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file_path = random_string(30)
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file = File.create(path=file_path)
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s3.upload_from_url(url, file_path)
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db.session.flush()
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LOG.d("upload file %s to s3", file)
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return file
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