mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-23 09:53:45 +03:00
464 lines
16 KiB
Python
464 lines
16 KiB
Python
import json
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import os
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import platform
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import sqlite3
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import struct
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import time
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from base64 import b64decode
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from enum import Enum
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from os.path import isfile as file_exists
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from threading import Lock
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from . import utils
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from .crypto import AuthKey
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from .tl import TLObject
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from .tl.types import (
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PeerUser, PeerChat, PeerChannel,
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InputPeerUser, InputPeerChat, InputPeerChannel,
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InputPhoto, InputDocument
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)
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EXTENSION = '.session'
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CURRENT_VERSION = 3 # database version
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class _SentFileType(Enum):
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DOCUMENT = 0
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PHOTO = 1
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@staticmethod
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def from_type(cls):
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if cls == InputDocument:
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return _SentFileType.DOCUMENT
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elif cls == InputPhoto:
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return _SentFileType.PHOTO
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else:
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raise ValueError('The cls must be either InputDocument/InputPhoto')
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class Session:
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"""This session contains the required information to login into your
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Telegram account. NEVER give the saved JSON file to anyone, since
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they would gain instant access to all your messages and contacts.
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If you think the session has been compromised, close all the sessions
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through an official Telegram client to revoke the authorization.
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"""
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def __init__(self, session_id):
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"""session_user_id should either be a string or another Session.
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Note that if another session is given, only parameters like
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those required to init a connection will be copied.
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"""
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# These values will NOT be saved
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self.filename = ':memory:'
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# For connection purposes
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if isinstance(session_id, Session):
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self.device_model = session_id.device_model
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self.system_version = session_id.system_version
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self.app_version = session_id.app_version
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self.lang_code = session_id.lang_code
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self.system_lang_code = session_id.system_lang_code
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self.lang_pack = session_id.lang_pack
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self.report_errors = session_id.report_errors
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self.save_entities = session_id.save_entities
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self.flood_sleep_threshold = session_id.flood_sleep_threshold
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else: # str / None
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if session_id:
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self.filename = session_id
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if not self.filename.endswith(EXTENSION):
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self.filename += EXTENSION
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system = platform.uname()
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self.device_model = system.system or 'Unknown'
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self.system_version = system.release or '1.0'
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self.app_version = '1.0' # '0' will provoke error
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self.lang_code = 'en'
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self.system_lang_code = self.lang_code
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self.lang_pack = ''
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self.report_errors = True
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self.save_entities = True
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self.flood_sleep_threshold = 60
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self.id = struct.unpack('q', os.urandom(8))[0]
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self._sequence = 0
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self.time_offset = 0
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self._last_msg_id = 0 # Long
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self.salt = 0 # Long
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# Cross-thread safety
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self._seq_no_lock = Lock()
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self._msg_id_lock = Lock()
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self._db_lock = Lock()
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# These values will be saved
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self._dc_id = 0
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self._server_address = None
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self._port = None
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self._auth_key = None
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# Migrating from .json -> SQL
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entities = self._check_migrate_json()
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self._conn = sqlite3.connect(self.filename, check_same_thread=False)
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c = self._conn.cursor()
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c.execute("select name from sqlite_master "
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"where type='table' and name='version'")
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if c.fetchone():
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# Tables already exist, check for the version
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c.execute("select version from version")
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version = c.fetchone()[0]
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if version != CURRENT_VERSION:
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self._upgrade_database(old=version)
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c.execute("delete from version")
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c.execute("insert into version values (?)", (CURRENT_VERSION,))
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self.save()
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# These values will be saved
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c.execute('select * from sessions')
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tuple_ = c.fetchone()
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if tuple_:
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self._dc_id, self._server_address, self._port, key, = tuple_
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self._auth_key = AuthKey(data=key)
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c.close()
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else:
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# Tables don't exist, create new ones
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self._create_table(
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c,
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"version (version integer primary key)"
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,
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"""sessions (
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dc_id integer primary key,
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server_address text,
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port integer,
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auth_key blob
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)"""
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,
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"""entities (
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id integer primary key,
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hash integer not null,
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username text,
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phone integer,
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name text
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)"""
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,
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"""sent_files (
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md5_digest blob,
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file_size integer,
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type integer,
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id integer,
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hash integer,
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primary key(md5_digest, file_size, type)
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)"""
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)
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c.execute("insert into version values (?)", (CURRENT_VERSION,))
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# Migrating from JSON -> new table and may have entities
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if entities:
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c.executemany(
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'insert or replace into entities values (?,?,?,?,?)',
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entities
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)
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c.close()
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self.save()
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def _check_migrate_json(self):
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if file_exists(self.filename):
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try:
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with open(self.filename, encoding='utf-8') as f:
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data = json.load(f)
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self.delete() # Delete JSON file to create database
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self._port = data.get('port', self._port)
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self._server_address = \
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data.get('server_address', self._server_address)
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if data.get('auth_key_data', None) is not None:
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key = b64decode(data['auth_key_data'])
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self._auth_key = AuthKey(data=key)
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rows = []
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for p_id, p_hash in data.get('entities', []):
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if p_hash is not None:
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rows.append((p_id, p_hash, None, None, None))
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return rows
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except UnicodeDecodeError:
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return [] # No entities
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def _upgrade_database(self, old):
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c = self._conn.cursor()
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# old == 1 doesn't have the old sent_files so no need to drop
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if old == 2:
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# Old cache from old sent_files lasts then a day anyway, drop
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c.execute('drop table sent_files')
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self._create_table(c, """sent_files (
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md5_digest blob,
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file_size integer,
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type integer,
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id integer,
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hash integer,
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primary key(md5_digest, file_size, type)
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)""")
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c.close()
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@staticmethod
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def _create_table(c, *definitions):
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"""
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Creates a table given its definition 'name (columns).
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If the sqlite version is >= 3.8.2, it will use "without rowid".
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See http://www.sqlite.org/releaselog/3_8_2.html.
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"""
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required = (3, 8, 2)
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sqlite_v = tuple(int(x) for x in sqlite3.sqlite_version.split('.'))
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extra = ' without rowid' if sqlite_v >= required else ''
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for definition in definitions:
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c.execute('create table {}{}'.format(definition, extra))
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# Data from sessions should be kept as properties
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# not to fetch the database every time we need it
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def set_dc(self, dc_id, server_address, port):
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self._dc_id = dc_id
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self._server_address = server_address
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self._port = port
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self._update_session_table()
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# Fetch the auth_key corresponding to this data center
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c = self._conn.cursor()
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c.execute('select auth_key from sessions')
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tuple_ = c.fetchone()
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if tuple_:
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self._auth_key = AuthKey(data=tuple_[0])
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else:
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self._auth_key = None
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c.close()
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@property
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def server_address(self):
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return self._server_address
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@property
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def port(self):
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return self._port
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@property
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def auth_key(self):
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return self._auth_key
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@auth_key.setter
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def auth_key(self, value):
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self._auth_key = value
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self._update_session_table()
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def _update_session_table(self):
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with self._db_lock:
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c = self._conn.cursor()
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# While we can save multiple rows into the sessions table
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# currently we only want to keep ONE as the tables don't
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# tell us which auth_key's are usable and will work. Needs
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# some more work before being able to save auth_key's for
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# multiple DCs. Probably done differently.
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c.execute('delete from sessions')
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c.execute('insert or replace into sessions values (?,?,?,?)', (
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self._dc_id,
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self._server_address,
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self._port,
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self._auth_key.key if self._auth_key else b''
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))
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c.close()
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def save(self):
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"""Saves the current session object as session_user_id.session"""
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with self._db_lock:
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self._conn.commit()
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def delete(self):
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"""Deletes the current session file"""
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if self.filename == ':memory:':
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return True
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try:
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os.remove(self.filename)
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return True
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except OSError:
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return False
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@staticmethod
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def list_sessions():
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"""Lists all the sessions of the users who have ever connected
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using this client and never logged out
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"""
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return [os.path.splitext(os.path.basename(f))[0]
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for f in os.listdir('.') if f.endswith(EXTENSION)]
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def generate_sequence(self, content_related):
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"""Thread safe method to generates the next sequence number,
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based on whether it was confirmed yet or not.
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Note that if confirmed=True, the sequence number
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will be increased by one too
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"""
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with self._seq_no_lock:
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if content_related:
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result = self._sequence * 2 + 1
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self._sequence += 1
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return result
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else:
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return self._sequence * 2
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def get_new_msg_id(self):
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"""Generates a new unique message ID based on the current
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time (in ms) since epoch"""
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# Refer to mtproto_plain_sender.py for the original method
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now = time.time()
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nanoseconds = int((now - int(now)) * 1e+9)
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# "message identifiers are divisible by 4"
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new_msg_id = (int(now) << 32) | (nanoseconds << 2)
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with self._msg_id_lock:
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if self._last_msg_id >= new_msg_id:
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new_msg_id = self._last_msg_id + 4
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self._last_msg_id = new_msg_id
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return new_msg_id
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def update_time_offset(self, correct_msg_id):
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"""Updates the time offset based on a known correct message ID"""
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now = int(time.time())
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correct = correct_msg_id >> 32
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self.time_offset = correct - now
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# Entity processing
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def process_entities(self, tlo):
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"""Processes all the found entities on the given TLObject,
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unless .enabled is False.
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Returns True if new input entities were added.
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"""
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if not self.save_entities:
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return
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if not isinstance(tlo, TLObject) and hasattr(tlo, '__iter__'):
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# This may be a list of users already for instance
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entities = tlo
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else:
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entities = []
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if hasattr(tlo, 'chats') and hasattr(tlo.chats, '__iter__'):
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entities.extend(tlo.chats)
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if hasattr(tlo, 'users') and hasattr(tlo.users, '__iter__'):
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entities.extend(tlo.users)
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if not entities:
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return
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rows = [] # Rows to add (id, hash, username, phone, name)
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for e in entities:
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if not isinstance(e, TLObject):
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continue
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try:
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p = utils.get_input_peer(e, allow_self=False)
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marked_id = utils.get_peer_id(p)
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except ValueError:
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continue
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if isinstance(p, (InputPeerUser, InputPeerChannel)):
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if not p.access_hash:
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# Some users and channels seem to be returned without
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# an 'access_hash', meaning Telegram doesn't want you
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# to access them. This is the reason behind ensuring
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# that the 'access_hash' is non-zero. See issue #354.
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# Note that this checks for zero or None, see #392.
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continue
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else:
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p_hash = p.access_hash
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elif isinstance(p, InputPeerChat):
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p_hash = 0
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else:
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continue
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username = getattr(e, 'username', None) or None
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if username is not None:
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username = username.lower()
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phone = getattr(e, 'phone', None)
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name = utils.get_display_name(e) or None
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rows.append((marked_id, p_hash, username, phone, name))
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if not rows:
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return
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with self._db_lock:
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self._conn.executemany(
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'insert or replace into entities values (?,?,?,?,?)', rows
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)
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self.save()
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def get_input_entity(self, key):
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"""Parses the given string, integer or TLObject key into a
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marked entity ID, which is then used to fetch the hash
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from the database.
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If a callable key is given, every row will be fetched,
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and passed as a tuple to a function, that should return
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a true-like value when the desired row is found.
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Raises ValueError if it cannot be found.
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"""
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if isinstance(key, TLObject):
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try:
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# Try to early return if this key can be casted as input peer
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return utils.get_input_peer(key)
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except TypeError:
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# Otherwise, get the ID of the peer
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key = utils.get_peer_id(key)
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c = self._conn.cursor()
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if isinstance(key, str):
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phone = utils.parse_phone(key)
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if phone:
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c.execute('select id, hash from entities where phone=?',
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(phone,))
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else:
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username, _ = utils.parse_username(key)
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c.execute('select id, hash from entities where username=?',
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(username,))
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if isinstance(key, int):
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c.execute('select id, hash from entities where id=?', (key,))
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result = c.fetchone()
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c.close()
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if result:
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i, h = result # unpack resulting tuple
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i, k = utils.resolve_id(i) # removes the mark and returns kind
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if k == PeerUser:
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return InputPeerUser(i, h)
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elif k == PeerChat:
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return InputPeerChat(i)
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elif k == PeerChannel:
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return InputPeerChannel(i, h)
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else:
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raise ValueError('Could not find input entity with key ', key)
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# File processing
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def get_file(self, md5_digest, file_size, cls):
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tuple_ = self._conn.execute(
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'select id, hash from sent_files '
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'where md5_digest = ? and file_size = ? and type = ?',
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(md5_digest, file_size, _SentFileType.from_type(cls).value)
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).fetchone()
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if tuple_:
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# Both allowed classes have (id, access_hash) as parameters
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return cls(tuple_[0], tuple_[1])
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def cache_file(self, md5_digest, file_size, instance):
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if not isinstance(instance, (InputDocument, InputPhoto)):
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raise TypeError('Cannot cache %s instance' % type(instance))
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with self._db_lock:
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self._conn.execute(
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'insert or replace into sent_files values (?,?,?,?,?)', (
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md5_digest, file_size,
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_SentFileType.from_type(type(instance)).value,
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instance.id, instance.access_hash
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))
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self.save()
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