mirror of
https://github.com/janeczku/calibre-web
synced 2024-12-27 02:20:31 +00:00
594 lines
22 KiB
Python
594 lines
22 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) 2018 idalin, 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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from __future__ import division, print_function, unicode_literals
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import os
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import json
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import shutil
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from flask import Response, stream_with_context
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from sqlalchemy import create_engine
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from sqlalchemy import Column, UniqueConstraint
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from sqlalchemy import String, Integer
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from sqlalchemy.orm import sessionmaker, scoped_session
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from sqlalchemy.ext.declarative import declarative_base
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try:
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from pydrive.auth import GoogleAuth
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from pydrive.drive import GoogleDrive
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from pydrive.auth import RefreshError
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from apiclient import errors
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gdrive_support = True
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except ImportError:
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gdrive_support = False
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from . import logger, cli, config
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from .constants import CONFIG_DIR as _CONFIG_DIR
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SETTINGS_YAML = os.path.join(_CONFIG_DIR, 'settings.yaml')
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CREDENTIALS = os.path.join(_CONFIG_DIR, 'gdrive_credentials')
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CLIENT_SECRETS = os.path.join(_CONFIG_DIR, 'client_secrets.json')
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log = logger.create()
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if gdrive_support:
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logger.get('googleapiclient.discovery_cache').setLevel(logger.logging.ERROR)
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if not logger.is_debug_enabled():
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logger.get('googleapiclient.discovery').setLevel(logger.logging.ERROR)
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class Singleton:
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"""
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A non-thread-safe helper class to ease implementing singletons.
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This should be used as a decorator -- not a metaclass -- to the
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class that should be a singleton.
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The decorated class can define one `__init__` function that
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takes only the `self` argument. Also, the decorated class cannot be
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inherited from. Other than that, there are no restrictions that apply
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to the decorated class.
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To get the singleton instance, use the `Instance` method. Trying
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to use `__call__` will result in a `TypeError` being raised.
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"""
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def __init__(self, decorated):
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self._decorated = decorated
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def Instance(self):
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"""
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Returns the singleton instance. Upon its first call, it creates a
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new instance of the decorated class and calls its `__init__` method.
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On all subsequent calls, the already created instance is returned.
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"""
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try:
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return self._instance
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except AttributeError:
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self._instance = self._decorated()
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return self._instance
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except ImportError as e:
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log.debug(e)
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return None
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def __call__(self):
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raise TypeError('Singletons must be accessed through `Instance()`.')
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def __instancecheck__(self, inst):
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return isinstance(inst, self._decorated)
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@Singleton
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class Gauth:
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def __init__(self):
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self.auth = GoogleAuth(settings_file=SETTINGS_YAML)
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@Singleton
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class Gdrive:
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def __init__(self):
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self.drive = getDrive(gauth=Gauth.Instance().auth)
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def is_gdrive_ready():
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return os.path.exists(SETTINGS_YAML) and os.path.exists(CREDENTIALS)
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engine = create_engine('sqlite:///{0}'.format(cli.gdpath), echo=False)
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Base = declarative_base()
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# Open session for database connection
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Session = sessionmaker()
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Session.configure(bind=engine)
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session = scoped_session(Session)
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class GdriveId(Base):
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__tablename__ = 'gdrive_ids'
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id = Column(Integer, primary_key=True)
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gdrive_id = Column(Integer, unique=True)
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path = Column(String)
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__table_args__ = (UniqueConstraint('gdrive_id', 'path', name='_gdrive_path_uc'),)
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def __repr__(self):
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return str(self.path)
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class PermissionAdded(Base):
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__tablename__ = 'permissions_added'
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id = Column(Integer, primary_key=True)
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gdrive_id = Column(Integer, unique=True)
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def __repr__(self):
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return str(self.gdrive_id)
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def migrate():
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if not engine.dialect.has_table(engine.connect(), "permissions_added"):
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PermissionAdded.__table__.create(bind = engine)
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for sql in session.execute("select sql from sqlite_master where type='table'"):
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if 'CREATE TABLE gdrive_ids' in sql[0]:
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currUniqueConstraint = 'UNIQUE (gdrive_id)'
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if currUniqueConstraint in sql[0]:
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sql=sql[0].replace(currUniqueConstraint, 'UNIQUE (gdrive_id, path)')
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sql=sql.replace(GdriveId.__tablename__, GdriveId.__tablename__ + '2')
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session.execute(sql)
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session.execute("INSERT INTO gdrive_ids2 (id, gdrive_id, path) SELECT id, "
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"gdrive_id, path FROM gdrive_ids;")
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session.commit()
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session.execute('DROP TABLE %s' % 'gdrive_ids')
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session.execute('ALTER TABLE gdrive_ids2 RENAME to gdrive_ids')
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break
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if not os.path.exists(cli.gdpath):
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try:
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Base.metadata.create_all(engine)
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except Exception:
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raise
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migrate()
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def getDrive(drive=None, gauth=None):
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if not drive:
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if not gauth:
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gauth = GoogleAuth(settings_file=SETTINGS_YAML)
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# Try to load saved client credentials
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gauth.LoadCredentialsFile(CREDENTIALS)
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if gauth.access_token_expired:
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# Refresh them if expired
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try:
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gauth.Refresh()
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except RefreshError as e:
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log.error("Google Drive error: %s", e)
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except Exception as e:
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log.exception(e)
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else:
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# Initialize the saved creds
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gauth.Authorize()
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# Save the current credentials to a file
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return GoogleDrive(gauth)
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if drive.auth.access_token_expired:
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try:
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drive.auth.Refresh()
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except RefreshError as e:
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log.error("Google Drive error: %s", e)
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return drive
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def listRootFolders():
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drive = getDrive(Gdrive.Instance().drive)
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folder = "'root' in parents and mimeType = 'application/vnd.google-apps.folder' and trashed = false"
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fileList = drive.ListFile({'q': folder}).GetList()
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return fileList
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def getEbooksFolder(drive):
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return getFolderInFolder('root',config.config_google_drive_folder,drive)
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def getFolderInFolder(parentId, folderName, drive):
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# drive = getDrive(drive)
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query=""
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if folderName:
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query = "title = '%s' and " % folderName.replace("'", r"\'")
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folder = query + "'%s' in parents and mimeType = 'application/vnd.google-apps.folder'" \
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" and trashed = false" % parentId
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fileList = drive.ListFile({'q': folder}).GetList()
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if fileList.__len__() == 0:
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return None
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else:
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return fileList[0]
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# Search for id of root folder in gdrive database, if not found request from gdrive and store in internal database
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def getEbooksFolderId(drive=None):
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storedPathName = session.query(GdriveId).filter(GdriveId.path == '/').first()
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if storedPathName:
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return storedPathName.gdrive_id
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else:
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gDriveId = GdriveId()
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try:
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gDriveId.gdrive_id = getEbooksFolder(drive)['id']
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except Exception:
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log.error('Error gDrive, root ID not found')
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gDriveId.path = '/'
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session.merge(gDriveId)
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session.commit()
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return
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def getFile(pathId, fileName, drive):
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metaDataFile = "'%s' in parents and trashed = false and title = '%s'" % (pathId, fileName.replace("'", r"\'"))
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fileList = drive.ListFile({'q': metaDataFile}).GetList()
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if fileList.__len__() == 0:
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return None
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else:
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return fileList[0]
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def getFolderId(path, drive):
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# drive = getDrive(drive)
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currentFolderId = getEbooksFolderId(drive)
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sqlCheckPath = path if path[-1] == '/' else path + '/'
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storedPathName = session.query(GdriveId).filter(GdriveId.path == sqlCheckPath).first()
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if not storedPathName:
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dbChange = False
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s = path.split('/')
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for i, x in enumerate(s):
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if len(x) > 0:
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currentPath = "/".join(s[:i+1])
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if currentPath[-1] != '/':
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currentPath = currentPath + '/'
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storedPathName = session.query(GdriveId).filter(GdriveId.path == currentPath).first()
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if storedPathName:
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currentFolderId = storedPathName.gdrive_id
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else:
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currentFolder = getFolderInFolder(currentFolderId, x, drive)
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if currentFolder:
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gDriveId = GdriveId()
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gDriveId.gdrive_id = currentFolder['id']
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gDriveId.path = currentPath
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session.merge(gDriveId)
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dbChange = True
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currentFolderId = currentFolder['id']
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else:
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currentFolderId = None
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break
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if dbChange:
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session.commit()
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else:
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currentFolderId = storedPathName.gdrive_id
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return currentFolderId
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def getFileFromEbooksFolder(path, fileName):
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drive = getDrive(Gdrive.Instance().drive)
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if path:
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# sqlCheckPath=path if path[-1] =='/' else path + '/'
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folderId = getFolderId(path, drive)
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else:
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folderId = getEbooksFolderId(drive)
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if folderId:
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return getFile(folderId, fileName, drive)
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else:
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return None
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def moveGdriveFileRemote(origin_file_id, new_title):
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origin_file_id['title']= new_title
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origin_file_id.Upload()
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# Download metadata.db from gdrive
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def downloadFile(path, filename, output):
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f = getFileFromEbooksFolder(path, filename)
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f.GetContentFile(output)
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def moveGdriveFolderRemote(origin_file, target_folder):
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drive = getDrive(Gdrive.Instance().drive)
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previous_parents = ",".join([parent["id"] for parent in origin_file.get('parents')])
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children = drive.auth.service.children().list(folderId=previous_parents).execute()
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gFileTargetDir = getFileFromEbooksFolder(None, target_folder)
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if not gFileTargetDir:
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# Folder is not existing, create, and move folder
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gFileTargetDir = drive.CreateFile(
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{'title': target_folder, 'parents': [{"kind": "drive#fileLink", 'id': getEbooksFolderId()}],
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"mimeType": "application/vnd.google-apps.folder"})
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gFileTargetDir.Upload()
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# Move the file to the new folder
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drive.auth.service.files().update(fileId=origin_file['id'],
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addParents=gFileTargetDir['id'],
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removeParents=previous_parents,
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fields='id, parents').execute()
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# if previous_parents has no childs anymore, delete original fileparent
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if len(children['items']) == 1:
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deleteDatabaseEntry(previous_parents)
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drive.auth.service.files().delete(fileId=previous_parents).execute()
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def copyToDrive(drive, uploadFile, createRoot, replaceFiles,
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ignoreFiles=None,
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parent=None, prevDir=''):
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ignoreFiles = ignoreFiles or []
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drive = getDrive(drive)
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isInitial = not bool(parent)
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if not parent:
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parent = getEbooksFolder(drive)
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if os.path.isdir(os.path.join(prevDir,uploadFile)):
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existingFolder = drive.ListFile({'q': "title = '%s' and '%s' in parents and trashed = false" %
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(os.path.basename(uploadFile).replace("'", r"\'"), parent['id'])}).GetList()
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if len(existingFolder) == 0 and (not isInitial or createRoot):
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parent = drive.CreateFile({'title': os.path.basename(uploadFile),
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'parents': [{"kind": "drive#fileLink", 'id': parent['id']}],
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"mimeType": "application/vnd.google-apps.folder"})
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parent.Upload()
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else:
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if (not isInitial or createRoot) and len(existingFolder) > 0:
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parent = existingFolder[0]
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for f in os.listdir(os.path.join(prevDir, uploadFile)):
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if f not in ignoreFiles:
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copyToDrive(drive, f, True, replaceFiles, ignoreFiles, parent, os.path.join(prevDir, uploadFile))
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else:
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if os.path.basename(uploadFile) not in ignoreFiles:
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existingFiles = drive.ListFile({'q': "title = '%s' and '%s' in parents and trashed = false" %
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(os.path.basename(uploadFile).replace("'", r"\'"), parent['id'])}).GetList()
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if len(existingFiles) > 0:
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driveFile = existingFiles[0]
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else:
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driveFile = drive.CreateFile({'title': os.path.basename(uploadFile).replace("'", r"\'"),
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'parents': [{"kind":"drive#fileLink", 'id': parent['id']}], })
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driveFile.SetContentFile(os.path.join(prevDir, uploadFile))
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driveFile.Upload()
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def uploadFileToEbooksFolder(destFile, f):
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drive = getDrive(Gdrive.Instance().drive)
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parent = getEbooksFolder(drive)
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splitDir = destFile.split('/')
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for i, x in enumerate(splitDir):
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if i == len(splitDir)-1:
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existingFiles = drive.ListFile({'q': "title = '%s' and '%s' in parents and trashed = false" %
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(x.replace("'", r"\'"), parent['id'])}).GetList()
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if len(existingFiles) > 0:
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driveFile = existingFiles[0]
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else:
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driveFile = drive.CreateFile({'title': x, 'parents': [{"kind": "drive#fileLink", 'id': parent['id']}],})
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driveFile.SetContentFile(f)
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driveFile.Upload()
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else:
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existingFolder = drive.ListFile({'q': "title = '%s' and '%s' in parents and trashed = false" %
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(x.replace("'", r"\'"), parent['id'])}).GetList()
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if len(existingFolder) == 0:
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parent = drive.CreateFile({'title': x, 'parents': [{"kind": "drive#fileLink", 'id': parent['id']}],
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"mimeType": "application/vnd.google-apps.folder"})
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parent.Upload()
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else:
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parent = existingFolder[0]
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def watchChange(drive, channel_id, channel_type, channel_address,
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channel_token=None, expiration=None):
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# Watch for all changes to a user's Drive.
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# Args:
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# service: Drive API service instance.
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# channel_id: Unique string that identifies this channel.
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# channel_type: Type of delivery mechanism used for this channel.
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# channel_address: Address where notifications are delivered.
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# channel_token: An arbitrary string delivered to the target address with
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# each notification delivered over this channel. Optional.
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# channel_address: Address where notifications are delivered. Optional.
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# Returns:
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# The created channel if successful
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# Raises:
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# apiclient.errors.HttpError: if http request to create channel fails.
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body = {
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'id': channel_id,
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'type': channel_type,
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'address': channel_address
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}
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if channel_token:
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body['token'] = channel_token
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if expiration:
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body['expiration'] = expiration
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return drive.auth.service.changes().watch(body=body).execute()
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def watchFile(drive, file_id, channel_id, channel_type, channel_address,
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channel_token=None, expiration=None):
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"""Watch for any changes to a specific file.
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Args:
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service: Drive API service instance.
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file_id: ID of the file to watch.
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channel_id: Unique string that identifies this channel.
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channel_type: Type of delivery mechanism used for this channel.
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channel_address: Address where notifications are delivered.
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channel_token: An arbitrary string delivered to the target address with
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each notification delivered over this channel. Optional.
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channel_address: Address where notifications are delivered. Optional.
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Returns:
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The created channel if successful
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Raises:
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apiclient.errors.HttpError: if http request to create channel fails.
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"""
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body = {
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'id': channel_id,
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'type': channel_type,
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'address': channel_address
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}
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if channel_token:
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body['token'] = channel_token
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if expiration:
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body['expiration'] = expiration
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return drive.auth.service.files().watch(fileId=file_id, body=body).execute()
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def stopChannel(drive, channel_id, resource_id):
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"""Stop watching to a specific channel.
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Args:
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service: Drive API service instance.
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channel_id: ID of the channel to stop.
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resource_id: Resource ID of the channel to stop.
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Raises:
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apiclient.errors.HttpError: if http request to create channel fails.
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"""
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body = {
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'id': channel_id,
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'resourceId': resource_id
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}
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return drive.auth.service.channels().stop(body=body).execute()
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def getChangeById (drive, change_id):
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# Print a single Change resource information.
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#
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# Args:
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# service: Drive API service instance.
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# change_id: ID of the Change resource to retrieve.
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try:
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change = drive.auth.service.changes().get(changeId=change_id).execute()
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return change
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except (errors.HttpError) as error:
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log.error(error)
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return None
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except Exception as e:
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log.error(e)
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return None
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# Deletes the local hashes database to force search for new folder names
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def deleteDatabaseOnChange():
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session.query(GdriveId).delete()
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session.commit()
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def updateGdriveCalibreFromLocal():
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copyToDrive(Gdrive.Instance().drive, config.config_calibre_dir, False, True)
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for x in os.listdir(config.config_calibre_dir):
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if os.path.isdir(os.path.join(config.config_calibre_dir, x)):
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shutil.rmtree(os.path.join(config.config_calibre_dir, x))
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# update gdrive.db on edit of books title
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def updateDatabaseOnEdit(ID,newPath):
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sqlCheckPath = newPath if newPath[-1] == '/' else newPath + u'/'
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storedPathName = session.query(GdriveId).filter(GdriveId.gdrive_id == ID).first()
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if storedPathName:
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|
storedPathName.path = sqlCheckPath
|
|
session.commit()
|
|
|
|
|
|
# Deletes the hashes in database of deleted book
|
|
def deleteDatabaseEntry(ID):
|
|
session.query(GdriveId).filter(GdriveId.gdrive_id == ID).delete()
|
|
session.commit()
|
|
|
|
|
|
# Gets cover file from gdrive
|
|
def get_cover_via_gdrive(cover_path):
|
|
df = getFileFromEbooksFolder(cover_path, 'cover.jpg')
|
|
if df:
|
|
if not session.query(PermissionAdded).filter(PermissionAdded.gdrive_id == df['id']).first():
|
|
df.GetPermissions()
|
|
df.InsertPermission({
|
|
'type': 'anyone',
|
|
'value': 'anyone',
|
|
'role': 'reader',
|
|
'withLink': True})
|
|
permissionAdded = PermissionAdded()
|
|
permissionAdded.gdrive_id = df['id']
|
|
session.add(permissionAdded)
|
|
session.commit()
|
|
return df.metadata.get('webContentLink')
|
|
else:
|
|
return None
|
|
|
|
# Creates chunks for downloading big files
|
|
def partial(total_byte_len, part_size_limit):
|
|
s = []
|
|
for p in range(0, total_byte_len, part_size_limit):
|
|
last = min(total_byte_len - 1, p + part_size_limit - 1)
|
|
s.append([p, last])
|
|
return s
|
|
|
|
# downloads files in chunks from gdrive
|
|
def do_gdrive_download(df, headers):
|
|
total_size = int(df.metadata.get('fileSize'))
|
|
download_url = df.metadata.get('downloadUrl')
|
|
s = partial(total_size, 1024 * 1024) # I'm downloading BIG files, so 100M chunk size is fine for me
|
|
|
|
def stream():
|
|
for byte in s:
|
|
headers = {"Range": 'bytes=%s-%s' % (byte[0], byte[1])}
|
|
resp, content = df.auth.Get_Http_Object().request(download_url, headers=headers)
|
|
if resp.status == 206:
|
|
yield content
|
|
else:
|
|
log.warning('An error occurred: %s', resp)
|
|
return
|
|
return Response(stream_with_context(stream()), headers=headers)
|
|
|
|
|
|
_SETTINGS_YAML_TEMPLATE = """
|
|
client_config_backend: settings
|
|
client_config_file: %(client_file)s
|
|
client_config:
|
|
client_id: %(client_id)s
|
|
client_secret: %(client_secret)s
|
|
redirect_uri: %(redirect_uri)s
|
|
|
|
save_credentials: True
|
|
save_credentials_backend: file
|
|
save_credentials_file: %(credential)s
|
|
|
|
get_refresh_token: True
|
|
|
|
oauth_scope:
|
|
- https://www.googleapis.com/auth/drive
|
|
"""
|
|
|
|
def update_settings(client_id, client_secret, redirect_uri):
|
|
if redirect_uri.endswith('/'):
|
|
redirect_uri = redirect_uri[:-1]
|
|
config_params = {
|
|
'client_file': CLIENT_SECRETS,
|
|
'client_id': client_id,
|
|
'client_secret': client_secret,
|
|
'redirect_uri': redirect_uri,
|
|
'credential': CREDENTIALS
|
|
}
|
|
|
|
with open(SETTINGS_YAML, 'w') as f:
|
|
f.write(_SETTINGS_YAML_TEMPLATE % config_params)
|
|
|
|
|
|
def get_error_text(client_secrets=None):
|
|
if not gdrive_support:
|
|
return 'Import of optional Google Drive requirements missing'
|
|
|
|
if not os.path.isfile(CLIENT_SECRETS):
|
|
return 'client_secrets.json is missing or not readable'
|
|
|
|
with open(CLIENT_SECRETS, 'r') as settings:
|
|
filedata = json.load(settings)
|
|
if 'web' not in filedata:
|
|
return 'client_secrets.json is not configured for web application'
|
|
if 'redirect_uris' not in filedata['web']:
|
|
return 'Callback url (redirect url) is missing in client_secrets.json'
|
|
if client_secrets:
|
|
client_secrets.update(filedata['web'])
|