mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-18 07:44:54 +00:00
195 lines
8.0 KiB
Python
195 lines
8.0 KiB
Python
#!/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 shavitmichael, 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 sys
|
|
from base64 import b64decode, b64encode
|
|
from jsonschema import validate, exceptions, __version__
|
|
from datetime import datetime
|
|
try:
|
|
# pylint: disable=unused-import
|
|
from urllib import unquote
|
|
except ImportError:
|
|
from urllib.parse import unquote
|
|
|
|
from flask import json
|
|
from .. import logger
|
|
|
|
|
|
log = logger.create()
|
|
|
|
|
|
def b64encode_json(json_data):
|
|
if sys.version_info < (3, 0):
|
|
return b64encode(json.dumps(json_data))
|
|
else:
|
|
return b64encode(json.dumps(json_data).encode())
|
|
|
|
|
|
# Python3 has a timestamp() method we could be calling, however it's not avaiable in python2.
|
|
def to_epoch_timestamp(datetime_object):
|
|
return (datetime_object - datetime(1970, 1, 1)).total_seconds()
|
|
|
|
|
|
def get_datetime_from_json(json_object, field_name):
|
|
try:
|
|
return datetime.utcfromtimestamp(json_object[field_name])
|
|
except (KeyError, OSError, OverflowError):
|
|
# OSError is thrown on Windows if timestamp is <1970 or >2038
|
|
return datetime.min
|
|
|
|
|
|
class SyncToken:
|
|
""" The SyncToken is used to persist state accross requests.
|
|
When serialized over the response headers, the Kobo device will propagate the token onto following
|
|
requests to the service. As an example use-case, the SyncToken is used to detect books that have been added
|
|
to the library since the last time the device synced to the server.
|
|
|
|
Attributes:
|
|
books_last_created: Datetime representing the newest book that the device knows about.
|
|
books_last_modified: Datetime representing the last modified book that the device knows about.
|
|
"""
|
|
|
|
SYNC_TOKEN_HEADER = "x-kobo-synctoken" # nosec
|
|
VERSION = "1-1-0"
|
|
LAST_MODIFIED_ADDED_VERSION = "1-1-0"
|
|
MIN_VERSION = "1-0-0"
|
|
|
|
token_schema = {
|
|
"type": "object",
|
|
"properties": {"version": {"type": "string"}, "data": {"type": "object"}, },
|
|
}
|
|
# This Schema doesn't contain enough information to detect and propagate book deletions from Calibre to the device.
|
|
# A potential solution might be to keep a list of all known book uuids in the token, and look for any missing
|
|
# from the db.
|
|
data_schema_v1 = {
|
|
"type": "object",
|
|
"properties": {
|
|
"raw_kobo_store_token": {"type": "string"},
|
|
"books_last_modified": {"type": "string"},
|
|
"books_last_created": {"type": "string"},
|
|
"archive_last_modified": {"type": "string"},
|
|
"reading_state_last_modified": {"type": "string"},
|
|
"tags_last_modified": {"type": "string"},
|
|
"books_last_id": {"type": "integer", "optional": True}
|
|
},
|
|
}
|
|
|
|
def __init__(
|
|
self,
|
|
raw_kobo_store_token="",
|
|
books_last_created=datetime.min,
|
|
books_last_modified=datetime.min,
|
|
archive_last_modified=datetime.min,
|
|
reading_state_last_modified=datetime.min,
|
|
tags_last_modified=datetime.min,
|
|
books_last_id=-1
|
|
): # nosec
|
|
self.raw_kobo_store_token = raw_kobo_store_token
|
|
self.books_last_created = books_last_created
|
|
self.books_last_modified = books_last_modified
|
|
self.archive_last_modified = archive_last_modified
|
|
self.reading_state_last_modified = reading_state_last_modified
|
|
self.tags_last_modified = tags_last_modified
|
|
self.books_last_id = books_last_id
|
|
|
|
@staticmethod
|
|
def from_headers(headers):
|
|
sync_token_header = headers.get(SyncToken.SYNC_TOKEN_HEADER, "")
|
|
if sync_token_header == "": # nosec
|
|
return SyncToken()
|
|
|
|
# On the first sync from a Kobo device, we may receive the SyncToken
|
|
# from the official Kobo store. Without digging too deep into it, that
|
|
# token is of the form [b64encoded blob].[b64encoded blob 2]
|
|
if "." in sync_token_header:
|
|
return SyncToken(raw_kobo_store_token=sync_token_header)
|
|
|
|
try:
|
|
sync_token_json = json.loads(
|
|
b64decode(sync_token_header + "=" * (-len(sync_token_header) % 4))
|
|
)
|
|
validate(sync_token_json, SyncToken.token_schema)
|
|
if sync_token_json["version"] < SyncToken.MIN_VERSION:
|
|
raise ValueError
|
|
|
|
data_json = sync_token_json["data"]
|
|
validate(sync_token_json, SyncToken.data_schema_v1)
|
|
except (exceptions.ValidationError, ValueError):
|
|
log.error("Sync token contents do not follow the expected json schema.")
|
|
return SyncToken()
|
|
|
|
raw_kobo_store_token = data_json["raw_kobo_store_token"]
|
|
try:
|
|
books_last_modified = get_datetime_from_json(data_json, "books_last_modified")
|
|
books_last_created = get_datetime_from_json(data_json, "books_last_created")
|
|
archive_last_modified = get_datetime_from_json(data_json, "archive_last_modified")
|
|
reading_state_last_modified = get_datetime_from_json(data_json, "reading_state_last_modified")
|
|
tags_last_modified = get_datetime_from_json(data_json, "tags_last_modified")
|
|
books_last_id = data_json["books_last_id"]
|
|
except TypeError:
|
|
log.error("SyncToken timestamps don't parse to a datetime.")
|
|
return SyncToken(raw_kobo_store_token=raw_kobo_store_token)
|
|
except KeyError:
|
|
books_last_id = -1
|
|
|
|
return SyncToken(
|
|
raw_kobo_store_token=raw_kobo_store_token,
|
|
books_last_created=books_last_created,
|
|
books_last_modified=books_last_modified,
|
|
archive_last_modified=archive_last_modified,
|
|
reading_state_last_modified=reading_state_last_modified,
|
|
tags_last_modified=tags_last_modified,
|
|
books_last_id=books_last_id
|
|
)
|
|
|
|
def set_kobo_store_header(self, store_headers):
|
|
store_headers.set(SyncToken.SYNC_TOKEN_HEADER, self.raw_kobo_store_token)
|
|
|
|
def merge_from_store_response(self, store_response):
|
|
self.raw_kobo_store_token = store_response.headers.get(
|
|
SyncToken.SYNC_TOKEN_HEADER, ""
|
|
)
|
|
|
|
def to_headers(self, headers):
|
|
headers[SyncToken.SYNC_TOKEN_HEADER] = self.build_sync_token()
|
|
|
|
def build_sync_token(self):
|
|
token = {
|
|
"version": SyncToken.VERSION,
|
|
"data": {
|
|
"raw_kobo_store_token": self.raw_kobo_store_token,
|
|
"books_last_modified": to_epoch_timestamp(self.books_last_modified),
|
|
"books_last_created": to_epoch_timestamp(self.books_last_created),
|
|
"archive_last_modified": to_epoch_timestamp(self.archive_last_modified),
|
|
"reading_state_last_modified": to_epoch_timestamp(self.reading_state_last_modified),
|
|
"tags_last_modified": to_epoch_timestamp(self.tags_last_modified),
|
|
"books_last_id":self.books_last_id
|
|
},
|
|
}
|
|
return b64encode_json(token)
|
|
|
|
def __str__(self):
|
|
return "{},{},{},{},{},{},{}".format(self.raw_kobo_store_token,
|
|
self.books_last_created,
|
|
self.books_last_modified,
|
|
self.archive_last_modified,
|
|
self.reading_state_last_modified,
|
|
self.tags_last_modified,
|
|
self.books_last_id)
|