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