149 lines
5.0 KiB
Python
149 lines
5.0 KiB
Python
from os import getenv
|
|
from authlib.integrations.flask_client import OAuth, OAuthError
|
|
from flask import Blueprint, jsonify, session, redirect, request
|
|
from blueprints.user import get_session_info_email
|
|
from database.database import Database
|
|
from dotenv import load_dotenv
|
|
from secrets import token_hex, token_urlsafe
|
|
from random import randint
|
|
|
|
oauth_bp = Blueprint("oauth", __name__)
|
|
google = None
|
|
|
|
load_dotenv()
|
|
url_api = getenv("VITE_API_URL")
|
|
url = getenv("HOMEPAGE_URL")
|
|
|
|
|
|
def init_oauth(app):
|
|
"""
|
|
Initialise the OAuth functionality.
|
|
"""
|
|
oauth = OAuth(app)
|
|
global google
|
|
google = oauth.register(
|
|
'google',
|
|
client_id=app.config['GOOGLE_CLIENT_ID'],
|
|
client_secret=app.config['GOOGLE_CLIENT_SECRET'],
|
|
authorize_url='https://accounts.google.com/o/oauth2/auth',
|
|
access_token_url='https://oauth2.googleapis.com/token',
|
|
client_kwargs={
|
|
'scope': 'openid profile email',
|
|
'prompt': 'select_account' # Forces account selection even if already logged in
|
|
},
|
|
api_base_url='https://www.googleapis.com/oauth2/v1/',
|
|
userinfo_endpoint='https://openidconnect.googleapis.com/v1/userinfo',
|
|
server_metadata_url='https://accounts.google.com/.well-known/openid-configuration',
|
|
redirect_uri=f"{url}/api/google_auth"
|
|
)
|
|
|
|
|
|
@oauth_bp.route('/login/google')
|
|
def login_google():
|
|
"""
|
|
Redirects to Google's OAuth authorization page
|
|
"""
|
|
# Create both nonce and state
|
|
session["nonce"] = token_urlsafe(16)
|
|
session["state"] = token_urlsafe(32)
|
|
session["origin"] = request.args.get("next")
|
|
|
|
# Make sure session is saved before redirect
|
|
session.modified = True
|
|
|
|
return google.authorize_redirect(
|
|
redirect_uri=f'{url}/api/google_auth',
|
|
nonce=session['nonce'],
|
|
state=session['state']
|
|
)
|
|
|
|
|
|
@oauth_bp.route('/google_auth')
|
|
def google_auth():
|
|
"""
|
|
Receives token from Google OAuth and authenticates it to validate login
|
|
"""
|
|
try:
|
|
# Check state parameter before authorizing
|
|
returned_state = request.args.get('state')
|
|
stored_state = session.get('state')
|
|
|
|
if not stored_state or stored_state != returned_state:
|
|
print(f"State mismatch: stored={stored_state}, returned={returned_state}", flush=True)
|
|
return jsonify({
|
|
'error': f"mismatching_state: CSRF Warning! State not equal in request and response.",
|
|
'message': 'Authentication failed'
|
|
}), 400
|
|
|
|
# State matched, proceed with token authorization
|
|
token = google.authorize_access_token()
|
|
|
|
# Verify nonce
|
|
nonce = session.get('nonce')
|
|
if not nonce:
|
|
return jsonify({'error': 'Missing nonce in session'}), 400
|
|
|
|
user = google.parse_id_token(token, nonce=nonce)
|
|
print(user, flush=True)
|
|
|
|
# Check if email exists to login else create a database entry
|
|
user_email = user.get("email")
|
|
|
|
user_data = get_session_info_email(user_email)
|
|
|
|
if not user_data:
|
|
with Database() as db:
|
|
# Generates a new username for the user
|
|
for _ in range(1000000):
|
|
username = user.get("given_name") + \
|
|
str(randint(1, 1000000))
|
|
taken = db.fetchone("""
|
|
SELECT * FROM users
|
|
WHERE username = ?
|
|
""", (username,))
|
|
|
|
if not taken:
|
|
break
|
|
|
|
db.execute(
|
|
"""INSERT INTO users
|
|
(username, email, stream_key)
|
|
VALUES (?, ?, ?)""",
|
|
(
|
|
username,
|
|
user_email,
|
|
token_hex(32),
|
|
)
|
|
)
|
|
user_data = get_session_info_email(user_email)
|
|
|
|
# Store origin, username and user_id before clearing session
|
|
origin = session.get("origin", f"{url.replace('/api', '')}")
|
|
username = user_data["username"]
|
|
user_id = user_data["user_id"]
|
|
|
|
# Clear session and set new data
|
|
session.clear()
|
|
session["username"] = username
|
|
session["user_id"] = user_id
|
|
|
|
# Ensure session is saved
|
|
session.modified = True
|
|
|
|
print(f"session: {session.get('username')}. user_id: {session.get('user_id')}", flush=True)
|
|
|
|
return redirect(origin)
|
|
|
|
except OAuthError as e:
|
|
print(f"OAuth Error: {str(e)}", flush=True)
|
|
return jsonify({
|
|
'message': 'Authentication failed',
|
|
'error': str(e)
|
|
}), 400
|
|
|
|
except Exception as e:
|
|
print(f"Unexpected Error: {str(e)}", flush=True)
|
|
return jsonify({
|
|
'message': 'An unexpected error occurred',
|
|
'error': str(e)
|
|
}), 500 |