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calibre-web/cps/services/gmail.py
2022-03-21 18:50:02 +01:00

101 lines
4.0 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2021 OzzieIsaacs
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os.path
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from googleapiclient.discovery import build
from google.oauth2.credentials import Credentials
from datetime import datetime
import base64
from flask_babel import gettext as _
from ..constants import CONFIG_DIR
from .. import logger
log = logger.create()
SCOPES = ['openid', 'https://www.googleapis.com/auth/gmail.send', 'https://www.googleapis.com/auth/userinfo.email']
def setup_gmail(token):
# If there are no (valid) credentials available, let the user log in.
creds = None
if "token" in token:
creds = Credentials(
token=token['token'],
refresh_token=token['refresh_token'],
token_uri=token['token_uri'],
client_id=token['client_id'],
client_secret=token['client_secret'],
scopes=token['scopes'],
)
creds.expiry = datetime.fromisoformat(token['expiry'])
if not creds or not creds.valid:
# don't forget to dump one more time after the refresh
# also, some file-locking routines wouldn't be needless
if creds and creds.expired and creds.refresh_token:
creds.refresh(Request())
else:
cred_file = os.path.join(CONFIG_DIR, 'gmail.json')
if not os.path.exists(cred_file):
raise Exception(_("Found no valid gmail.json file with OAuth information"))
flow = InstalledAppFlow.from_client_secrets_file(
os.path.join(CONFIG_DIR, 'gmail.json'), SCOPES)
creds = flow.run_local_server(port=0)
user_info = get_user_info(creds)
return {
'token': creds.token,
'refresh_token': creds.refresh_token,
'token_uri': creds.token_uri,
'client_id': creds.client_id,
'client_secret': creds.client_secret,
'scopes': creds.scopes,
'expiry': creds.expiry.isoformat(),
'email': user_info
}
return {}
def get_user_info(credentials):
user_info_service = build(serviceName='oauth2', version='v2',credentials=credentials)
user_info = user_info_service.userinfo().get().execute()
return user_info.get('email', "")
def send_messsage(token, msg):
log.debug("Start sending e-mail via Gmail")
creds = Credentials(
token=token['token'],
refresh_token=token['refresh_token'],
token_uri=token['token_uri'],
client_id=token['client_id'],
client_secret=token['client_secret'],
scopes=token['scopes'],
)
creds.expiry = datetime.fromisoformat(token['expiry'])
if creds and creds.expired and creds.refresh_token:
creds.refresh(Request())
service = build('gmail', 'v1', credentials=creds)
message_as_bytes = msg.as_bytes() # the message should converted from string to bytes.
message_as_base64 = base64.urlsafe_b64encode(message_as_bytes) # encode in base64 (printable letters coding)
raw = message_as_base64.decode() # convert to something JSON serializable
body = {'raw': raw}
(service.users().messages().send(userId='me', body=body).execute())
log.debug("E-mail send successfully via Gmail")