calibre-web/cps/gdrive.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2018-2019 OzzieIsaacs, cervinko, jkrehm, bodybybuddha, ok11,
# andy29485, idalin, Kyosfonica, wuqi, Kennyl, lemmsh,
# falgh1, grunjol, csitko, ytils, xybydy, trasba, vrabe,
# ruben-herold, marblepebble, JackED42, SiphonSquirrel,
# apetresc, nanu-c, mutschler
#
# 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
from flask import Blueprint
from . import gdriveutils
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from flask import flash, request, redirect, url_for, abort
from flask_babel import gettext as _
from . import app, config, ub, db
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from flask_login import login_required
import json
from uuid import uuid4
from time import time
import tempfile
from shutil import move, copyfile
from .web import admin_required
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try:
from googleapiclient.errors import HttpError
except ImportError:
pass
gdrive = Blueprint('gdrive', __name__)
current_milli_time = lambda: int(round(time() * 1000))
gdrive_watch_callback_token = 'target=calibreweb-watch_files'
@gdrive.route("/gdrive/authenticate")
@login_required
@admin_required
def authenticate_google_drive():
try:
authUrl = gdriveutils.Gauth.Instance().auth.GetAuthUrl()
except gdriveutils.InvalidConfigError:
flash(_(u'Google Drive setup not completed, try to deactivate and activate Google Drive again'),
category="error")
return redirect(url_for('web.index'))
return redirect(authUrl)
@gdrive.route("/gdrive/callback")
def google_drive_callback():
auth_code = request.args.get('code')
if not auth_code:
abort(403)
try:
credentials = gdriveutils.Gauth.Instance().auth.flow.step2_exchange(auth_code)
with open(os.path.join(config.get_main_dir,'gdrive_credentials'), 'w') as f:
f.write(credentials.to_json())
except ValueError as error:
app.logger.error(error)
return redirect(url_for('admin.configuration'))
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@gdrive.route("/gdrive/watch/subscribe")
@login_required
@admin_required
def watch_gdrive():
if not config.config_google_drive_watch_changes_response:
with open(os.path.join(config.get_main_dir,'client_secrets.json'), 'r') as settings:
filedata = json.load(settings)
if filedata['web']['redirect_uris'][0].endswith('/'):
filedata['web']['redirect_uris'][0] = filedata['web']['redirect_uris'][0][:-((len('/gdrive/callback')+1))]
else:
filedata['web']['redirect_uris'][0] = filedata['web']['redirect_uris'][0][:-(len('/gdrive/callback'))]
address = '%s/gdrive/watch/callback' % filedata['web']['redirect_uris'][0]
notification_id = str(uuid4())
try:
result = gdriveutils.watchChange(gdriveutils.Gdrive.Instance().drive, notification_id,
'web_hook', address, gdrive_watch_callback_token, current_milli_time() + 604800*1000)
settings = ub.session.query(ub.Settings).first()
settings.config_google_drive_watch_changes_response = json.dumps(result)
ub.session.merge(settings)
ub.session.commit()
settings = ub.session.query(ub.Settings).first()
config.loadSettings()
except HttpError as e:
reason=json.loads(e.content)['error']['errors'][0]
if reason['reason'] == u'push.webhookUrlUnauthorized':
flash(_(u'Callback domain is not verified, please follow steps to verify domain in google developer console'), category="error")
else:
flash(reason['message'], category="error")
return redirect(url_for('admin.configuration'))
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@gdrive.route("/gdrive/watch/revoke")
@login_required
@admin_required
def revoke_watch_gdrive():
last_watch_response = config.config_google_drive_watch_changes_response
if last_watch_response:
try:
gdriveutils.stopChannel(gdriveutils.Gdrive.Instance().drive, last_watch_response['id'],
last_watch_response['resourceId'])
except HttpError:
pass
settings = ub.session.query(ub.Settings).first()
settings.config_google_drive_watch_changes_response = None
ub.session.merge(settings)
ub.session.commit()
config.loadSettings()
return redirect(url_for('admin.configuration'))
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@gdrive.route("/gdrive/watch/callback", methods=['GET', 'POST'])
def on_received_watch_confirmation():
app.logger.debug(request.headers)
if request.headers.get('X-Goog-Channel-Token') == gdrive_watch_callback_token \
and request.headers.get('X-Goog-Resource-State') == 'change' \
and request.data:
data = request.data
def updateMetaData():
app.logger.info('Change received from gdrive')
app.logger.debug(data)
try:
j = json.loads(data)
app.logger.info('Getting change details')
response = gdriveutils.getChangeById(gdriveutils.Gdrive.Instance().drive, j['id'])
app.logger.debug(response)
if response:
dbpath = os.path.join(config.config_calibre_dir, "metadata.db")
if not response['deleted'] and response['file']['title'] == 'metadata.db' and response['file']['md5Checksum'] != hashlib.md5(dbpath):
tmpDir = tempfile.gettempdir()
app.logger.info('Database file updated')
copyfile(dbpath, os.path.join(tmpDir, "metadata.db_" + str(current_milli_time())))
app.logger.info('Backing up existing and downloading updated metadata.db')
gdriveutils.downloadFile(None, "metadata.db", os.path.join(tmpDir, "tmp_metadata.db"))
app.logger.info('Setting up new DB')
# prevent error on windows, as os.rename does on exisiting files
move(os.path.join(tmpDir, "tmp_metadata.db"), dbpath)
db.setup_db()
except Exception as e:
app.logger.info(e.message)
app.logger.exception(e)
updateMetaData()
return ''