mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-22 17:36:34 +03:00
689 lines
26 KiB
Python
689 lines
26 KiB
Python
import abc
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import asyncio
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import collections
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import logging
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import platform
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import time
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import typing
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from .. import version, helpers, __name__ as __base_name__
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from ..crypto import rsa
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from ..entitycache import EntityCache
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from ..extensions import markdown
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from ..network import MTProtoSender, Connection, ConnectionTcpFull, TcpMTProxy
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from ..sessions import Session, SQLiteSession, MemorySession
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from ..statecache import StateCache
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from ..tl import TLObject, functions, types
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from ..tl.alltlobjects import LAYER
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DEFAULT_DC_ID = 4
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DEFAULT_IPV4_IP = '149.154.167.51'
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DEFAULT_IPV6_IP = '[2001:67c:4e8:f002::a]'
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DEFAULT_PORT = 443
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if typing.TYPE_CHECKING:
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from .telegramclient import TelegramClient
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__default_log__ = logging.getLogger(__base_name__)
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__default_log__.addHandler(logging.NullHandler())
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# TODO How hard would it be to support both `trio` and `asyncio`?
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class TelegramBaseClient(abc.ABC):
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"""
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This is the abstract base class for the client. It defines some
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basic stuff like connecting, switching data center, etc, and
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leaves the `__call__` unimplemented.
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Arguments
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session (`str` | `telethon.sessions.abstract.Session`, `None`):
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The file name of the session file to be used if a string is
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given (it may be a full path), or the Session instance to be
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used otherwise. If it's `None`, the session will not be saved,
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and you should call :meth:`.log_out()` when you're done.
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Note that if you pass a string it will be a file in the current
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working directory, although you can also pass absolute paths.
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The session file contains enough information for you to login
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without re-sending the code, so if you have to enter the code
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more than once, maybe you're changing the working directory,
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renaming or removing the file, or using random names.
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api_id (`int` | `str`):
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The API ID you obtained from https://my.telegram.org.
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api_hash (`str`):
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The API ID you obtained from https://my.telegram.org.
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connection (`telethon.network.connection.common.Connection`, optional):
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The connection instance to be used when creating a new connection
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to the servers. It **must** be a type.
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Defaults to `telethon.network.connection.tcpfull.ConnectionTcpFull`.
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use_ipv6 (`bool`, optional):
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Whether to connect to the servers through IPv6 or not.
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By default this is `False` as IPv6 support is not
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too widespread yet.
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proxy (`tuple` | `list` | `dict`, optional):
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An iterable consisting of the proxy info. If `connection` is
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one of `MTProxy`, then it should contain MTProxy credentials:
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``('hostname', port, 'secret')``. Otherwise, it's meant to store
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function parameters for PySocks, like ``(type, 'hostname', port)``.
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See https://github.com/Anorov/PySocks#usage-1 for more.
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timeout (`int` | `float`, optional):
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The timeout in seconds to be used when connecting.
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This is **not** the timeout to be used when ``await``'ing for
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invoked requests, and you should use ``asyncio.wait`` or
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``asyncio.wait_for`` for that.
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request_retries (`int` | `None`, optional):
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How many times a request should be retried. Request are retried
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when Telegram is having internal issues (due to either
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``errors.ServerError`` or ``errors.RpcCallFailError``),
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when there is a ``errors.FloodWaitError`` less than
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`flood_sleep_threshold`, or when there's a migrate error.
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May take a negative or `None` value for infinite retries, but
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this is not recommended, since some requests can always trigger
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a call fail (such as searching for messages).
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connection_retries (`int` | `None`, optional):
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How many times the reconnection should retry, either on the
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initial connection or when Telegram disconnects us. May be
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set to a negative or `None` value for infinite retries, but
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this is not recommended, since the program can get stuck in an
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infinite loop.
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retry_delay (`int` | `float`, optional):
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The delay in seconds to sleep between automatic reconnections.
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auto_reconnect (`bool`, optional):
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Whether reconnection should be retried `connection_retries`
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times automatically if Telegram disconnects us or not.
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sequential_updates (`bool`, optional):
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By default every incoming update will create a new task, so
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you can handle several updates in parallel. Some scripts need
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the order in which updates are processed to be sequential, and
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this setting allows them to do so.
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If set to `True`, incoming updates will be put in a queue
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and processed sequentially. This means your event handlers
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should *not* perform long-running operations since new
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updates are put inside of an unbounded queue.
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flood_sleep_threshold (`int` | `float`, optional):
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The threshold below which the library should automatically
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sleep on flood wait and slow mode wait errors (inclusive). For instance, if a
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``FloodWaitError`` for 17s occurs and `flood_sleep_threshold`
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is 20s, the library will ``sleep`` automatically. If the error
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was for 21s, it would ``raise FloodWaitError`` instead. Values
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larger than a day (like ``float('inf')``) will be changed to a day.
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device_model (`str`, optional):
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"Device model" to be sent when creating the initial connection.
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Defaults to ``platform.node()``.
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system_version (`str`, optional):
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"System version" to be sent when creating the initial connection.
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Defaults to ``platform.system()``.
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app_version (`str`, optional):
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"App version" to be sent when creating the initial connection.
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Defaults to `telethon.version.__version__`.
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lang_code (`str`, optional):
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"Language code" to be sent when creating the initial connection.
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Defaults to ``'en'``.
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system_lang_code (`str`, optional):
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"System lang code" to be sent when creating the initial connection.
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Defaults to `lang_code`.
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loop (`asyncio.AbstractEventLoop`, optional):
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Asyncio event loop to use. Defaults to `asyncio.get_event_loop()`
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base_logger (`str` | `logging.Logger`, optional):
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Base logger name or instance to use.
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If a `str` is given, it'll be passed to `logging.getLogger()`. If a
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`logging.Logger` is given, it'll be used directly. If something
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else or nothing is given, the default logger will be used.
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"""
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# Current TelegramClient version
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__version__ = version.__version__
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# Cached server configuration (with .dc_options), can be "global"
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_config = None
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_cdn_config = None
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# region Initialization
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def __init__(
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self: 'TelegramClient',
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session: 'typing.Union[str, Session]',
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api_id: int,
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api_hash: str,
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*,
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connection: 'typing.Type[Connection]' = ConnectionTcpFull,
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use_ipv6: bool = False,
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proxy: typing.Union[tuple, dict] = None,
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timeout: int = 10,
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request_retries: int = 5,
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connection_retries: int =5,
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retry_delay: int = 1,
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auto_reconnect: bool = True,
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sequential_updates: bool = False,
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flood_sleep_threshold: int = 60,
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device_model: str = None,
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system_version: str = None,
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app_version: str = None,
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lang_code: str = 'en',
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system_lang_code: str = 'en',
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loop: asyncio.AbstractEventLoop = None,
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base_logger: typing.Union[str, logging.Logger] = None):
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if not api_id or not api_hash:
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raise ValueError(
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"Your API ID or Hash cannot be empty or None. "
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"Refer to telethon.rtfd.io for more information.")
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self._use_ipv6 = use_ipv6
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self._loop = loop or asyncio.get_event_loop()
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if isinstance(base_logger, str):
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base_logger = logging.getLogger(base_logger)
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elif not isinstance(base_logger, logging.Logger):
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base_logger = __default_log__
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class _Loggers(dict):
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def __missing__(self, key):
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if key.startswith("telethon."):
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key = key.split('.', maxsplit=1)[1]
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return base_logger.getChild(key)
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self._log = _Loggers()
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# Determine what session object we have
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if isinstance(session, str) or session is None:
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try:
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session = SQLiteSession(session)
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except ImportError:
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import warnings
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warnings.warn(
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'The sqlite3 module is not available under this '
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'Python installation and no custom session '
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'instance was given; using MemorySession.\n'
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'You will need to re-login every time unless '
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'you use another session storage'
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)
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session = MemorySession()
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elif not isinstance(session, Session):
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raise TypeError(
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'The given session must be a str or a Session instance.'
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)
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# ':' in session.server_address is True if it's an IPv6 address
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if (not session.server_address or
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(':' in session.server_address) != use_ipv6):
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session.set_dc(
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DEFAULT_DC_ID,
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DEFAULT_IPV6_IP if self._use_ipv6 else DEFAULT_IPV4_IP,
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DEFAULT_PORT
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)
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self.flood_sleep_threshold = flood_sleep_threshold
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# TODO Use AsyncClassWrapper(session)
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# ChatGetter and SenderGetter can use the in-memory _entity_cache
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# to avoid network access and the need for await in session files.
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#
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# The session files only wants the entities to persist
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# them to disk, and to save additional useful information.
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# TODO Session should probably return all cached
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# info of entities, not just the input versions
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self.session = session
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self._entity_cache = EntityCache()
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self.api_id = int(api_id)
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self.api_hash = api_hash
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self._request_retries = request_retries
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self._connection_retries = connection_retries
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self._retry_delay = retry_delay or 0
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self._proxy = proxy
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self._timeout = timeout
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self._auto_reconnect = auto_reconnect
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assert isinstance(connection, type)
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self._connection = connection
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init_proxy = None if not issubclass(connection, TcpMTProxy) else \
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types.InputClientProxy(*connection.address_info(proxy))
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# Used on connection. Capture the variables in a lambda since
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# exporting clients need to create this InvokeWithLayerRequest.
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system = platform.uname()
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self._init_with = lambda x: functions.InvokeWithLayerRequest(
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LAYER, functions.InitConnectionRequest(
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api_id=self.api_id,
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device_model=device_model or system.system or 'Unknown',
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system_version=system_version or system.release or '1.0',
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app_version=app_version or self.__version__,
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lang_code=lang_code,
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system_lang_code=system_lang_code,
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lang_pack='', # "langPacks are for official apps only"
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query=x,
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proxy=init_proxy
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)
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)
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self._sender = MTProtoSender(
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self.session.auth_key, self._loop,
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loggers=self._log,
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retries=self._connection_retries,
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delay=self._retry_delay,
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auto_reconnect=self._auto_reconnect,
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connect_timeout=self._timeout,
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auth_key_callback=self._auth_key_callback,
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update_callback=self._handle_update,
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auto_reconnect_callback=self._handle_auto_reconnect
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)
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# Remember flood-waited requests to avoid making them again
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self._flood_waited_requests = {}
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# Cache ``{dc_id: (n, MTProtoSender)}`` for all borrowed senders,
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# being ``n`` the amount of borrows a given sender has; once ``n``
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# reaches ``0`` it should be disconnected and removed.
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self._borrowed_senders = {}
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self._borrow_sender_lock = asyncio.Lock(loop=self._loop)
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self._updates_handle = None
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self._last_request = time.time()
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self._channel_pts = {}
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if sequential_updates:
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self._updates_queue = asyncio.Queue(loop=self._loop)
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self._dispatching_updates_queue = asyncio.Event(loop=self._loop)
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else:
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# Use a set of pending instead of a queue so we can properly
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# terminate all pending updates on disconnect.
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self._updates_queue = set()
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self._dispatching_updates_queue = None
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self._authorized = None # None = unknown, False = no, True = yes
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# Update state (for catching up after a disconnection)
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# TODO Get state from channels too
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self._state_cache = StateCache(
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self.session.get_update_state(0), self._log)
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# Some further state for subclasses
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self._event_builders = []
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# {chat_id: {Conversation}}
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self._conversations = collections.defaultdict(set)
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# Default parse mode
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self._parse_mode = markdown
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# Some fields to easy signing in. Let {phone: hash} be
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# a dictionary because the user may change their mind.
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self._phone_code_hash = {}
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self._phone = None
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self._tos = None
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# Sometimes we need to know who we are, cache the self peer
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self._self_input_peer = None
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self._bot = None
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# A place to store if channels are a megagroup or not (see `edit_admin`)
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self._megagroup_cache = {}
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# endregion
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# region Properties
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@property
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def loop(self: 'TelegramClient') -> asyncio.AbstractEventLoop:
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"""
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Property with the ``asyncio`` event loop used by this client.
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Example
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.. code-block:: python
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# Download media in the background
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task = client.loop_create_task(message.download_media())
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# Do some work
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...
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# Join the task (wait for it to complete)
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await task
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"""
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return self._loop
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@property
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def disconnected(self: 'TelegramClient') -> asyncio.Future:
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"""
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Property with a ``Future`` that resolves upon disconnection.
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Example
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.. code-block:: python
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# Wait for a disconnection to occur
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try:
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await client.disconnected
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except OSError:
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print('Error on disconnect')
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"""
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return self._sender.disconnected
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# endregion
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# region Connecting
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async def connect(self: 'TelegramClient') -> None:
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"""
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Connects to Telegram.
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.. note::
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Connect means connect and nothing else, and only one low-level
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request is made to notify Telegram about which layer we will be
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using.
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Before Telegram sends you updates, you need to make a high-level
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request, like `client.get_me() <telethon.client.users.UserMethods.get_me>`,
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as described in https://core.telegram.org/api/updates.
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Example
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.. code-block:: python
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try:
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await client.connect()
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except OSError:
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print('Failed to connect')
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"""
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if not await self._sender.connect(self._connection(
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self.session.server_address,
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self.session.port,
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self.session.dc_id,
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loop=self._loop,
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loggers=self._log,
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proxy=self._proxy
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)):
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# We don't want to init or modify anything if we were already connected
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return
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self.session.auth_key = self._sender.auth_key
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self.session.save()
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await self._sender.send(self._init_with(
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functions.help.GetConfigRequest()))
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self._updates_handle = self._loop.create_task(self._update_loop())
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def is_connected(self: 'TelegramClient') -> bool:
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"""
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Returns `True` if the user has connected.
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This method is **not** asynchronous (don't use ``await`` on it).
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Example
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.. code-block:: python
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while client.is_connected():
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await asyncio.sleep(1)
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"""
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sender = getattr(self, '_sender', None)
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return sender and sender.is_connected()
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def disconnect(self: 'TelegramClient'):
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"""
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Disconnects from Telegram.
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If the event loop is already running, this method returns a
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coroutine that you should await on your own code; otherwise
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the loop is ran until said coroutine completes.
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Example
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.. code-block:: python
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# You don't need to use this if you used "with client"
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await client.disconnect()
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"""
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if self._loop.is_running():
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return self._disconnect_coro()
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else:
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try:
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self._loop.run_until_complete(self._disconnect_coro())
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except RuntimeError:
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# Python 3.5.x complains when called from
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# `__aexit__` and there were pending updates with:
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# "Event loop stopped before Future completed."
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#
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# However, it doesn't really make a lot of sense.
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pass
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async def _disconnect_coro(self: 'TelegramClient'):
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await self._disconnect()
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# trio's nurseries would handle this for us, but this is asyncio.
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# All tasks spawned in the background should properly be terminated.
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if self._dispatching_updates_queue is None and self._updates_queue:
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for task in self._updates_queue:
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task.cancel()
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await asyncio.wait(self._updates_queue, loop=self._loop)
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self._updates_queue.clear()
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pts, date = self._state_cache[None]
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if pts and date:
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self.session.set_update_state(0, types.updates.State(
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pts=pts,
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qts=0,
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date=date,
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seq=0,
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unread_count=0
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))
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self.session.close()
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async def _disconnect(self: 'TelegramClient'):
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"""
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Disconnect only, without closing the session. Used in reconnections
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to different data centers, where we don't want to close the session
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file; user disconnects however should close it since it means that
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their job with the client is complete and we should clean it up all.
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"""
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await self._sender.disconnect()
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await helpers._cancel(self._log[__name__],
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updates_handle=self._updates_handle)
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async def _switch_dc(self: 'TelegramClient', new_dc):
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"""
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Permanently switches the current connection to the new data center.
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"""
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self._log[__name__].info('Reconnecting to new data center %s', new_dc)
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dc = await self._get_dc(new_dc)
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self.session.set_dc(dc.id, dc.ip_address, dc.port)
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# auth_key's are associated with a server, which has now changed
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# so it's not valid anymore. Set to None to force recreating it.
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self._sender.auth_key.key = None
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self.session.auth_key = None
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self.session.save()
|
|
await self._disconnect()
|
|
return await self.connect()
|
|
|
|
def _auth_key_callback(self: 'TelegramClient', auth_key):
|
|
"""
|
|
Callback from the sender whenever it needed to generate a
|
|
new authorization key. This means we are not authorized.
|
|
"""
|
|
self.session.auth_key = auth_key
|
|
self.session.save()
|
|
|
|
# endregion
|
|
|
|
# region Working with different connections/Data Centers
|
|
|
|
async def _get_dc(self: 'TelegramClient', dc_id, cdn=False):
|
|
"""Gets the Data Center (DC) associated to 'dc_id'"""
|
|
cls = self.__class__
|
|
if not cls._config:
|
|
cls._config = await self(functions.help.GetConfigRequest())
|
|
|
|
if cdn and not self._cdn_config:
|
|
cls._cdn_config = await self(functions.help.GetCdnConfigRequest())
|
|
for pk in cls._cdn_config.public_keys:
|
|
rsa.add_key(pk.public_key)
|
|
|
|
return next(
|
|
dc for dc in cls._config.dc_options
|
|
if dc.id == dc_id
|
|
and bool(dc.ipv6) == self._use_ipv6 and bool(dc.cdn) == cdn
|
|
)
|
|
|
|
async def _create_exported_sender(self: 'TelegramClient', dc_id):
|
|
"""
|
|
Creates a new exported `MTProtoSender` for the given `dc_id` and
|
|
returns it. This method should be used by `_borrow_exported_sender`.
|
|
"""
|
|
# Thanks badoualy/kotlogram on /telegram/api/DefaultTelegramClient.kt
|
|
# for clearly showing how to export the authorization
|
|
dc = await self._get_dc(dc_id)
|
|
# Can't reuse self._sender._connection as it has its own seqno.
|
|
#
|
|
# If one were to do that, Telegram would reset the connection
|
|
# with no further clues.
|
|
sender = MTProtoSender(None, self._loop, loggers=self._log)
|
|
await sender.connect(self._connection(
|
|
dc.ip_address,
|
|
dc.port,
|
|
dc.id,
|
|
loop=self._loop,
|
|
loggers=self._log,
|
|
proxy=self._proxy
|
|
))
|
|
self._log[__name__].info('Exporting authorization for data center %s',
|
|
dc)
|
|
auth = await self(functions.auth.ExportAuthorizationRequest(dc_id))
|
|
req = self._init_with(functions.auth.ImportAuthorizationRequest(
|
|
id=auth.id, bytes=auth.bytes
|
|
))
|
|
await sender.send(req)
|
|
return sender
|
|
|
|
async def _borrow_exported_sender(self: 'TelegramClient', dc_id):
|
|
"""
|
|
Borrows a connected `MTProtoSender` for the given `dc_id`.
|
|
If it's not cached, creates a new one if it doesn't exist yet,
|
|
and imports a freshly exported authorization key for it to be usable.
|
|
|
|
Once its job is over it should be `_return_exported_sender`.
|
|
"""
|
|
async with self._borrow_sender_lock:
|
|
n, sender = self._borrowed_senders.get(dc_id, (0, None))
|
|
if not sender:
|
|
sender = await self._create_exported_sender(dc_id)
|
|
sender.dc_id = dc_id
|
|
elif not n:
|
|
dc = await self._get_dc(dc_id)
|
|
await sender.connect(self._connection(
|
|
dc.ip_address,
|
|
dc.port,
|
|
dc.id,
|
|
loop=self._loop,
|
|
loggers=self._log,
|
|
proxy=self._proxy
|
|
))
|
|
|
|
self._borrowed_senders[dc_id] = (n + 1, sender)
|
|
|
|
return sender
|
|
|
|
async def _return_exported_sender(self: 'TelegramClient', sender):
|
|
"""
|
|
Returns a borrowed exported sender. If all borrows have
|
|
been returned, the sender is cleanly disconnected.
|
|
"""
|
|
async with self._borrow_sender_lock:
|
|
dc_id = sender.dc_id
|
|
n, _ = self._borrowed_senders[dc_id]
|
|
n -= 1
|
|
self._borrowed_senders[dc_id] = (n, sender)
|
|
if not n:
|
|
self._log[__name__].info(
|
|
'Disconnecting borrowed sender for DC %d', dc_id)
|
|
await sender.disconnect()
|
|
|
|
async def _get_cdn_client(self: 'TelegramClient', cdn_redirect):
|
|
"""Similar to ._borrow_exported_client, but for CDNs"""
|
|
# TODO Implement
|
|
raise NotImplementedError
|
|
session = self._exported_sessions.get(cdn_redirect.dc_id)
|
|
if not session:
|
|
dc = await self._get_dc(cdn_redirect.dc_id, cdn=True)
|
|
session = self.session.clone()
|
|
await session.set_dc(dc.id, dc.ip_address, dc.port)
|
|
self._exported_sessions[cdn_redirect.dc_id] = session
|
|
|
|
self._log[__name__].info('Creating new CDN client')
|
|
client = TelegramBareClient(
|
|
session, self.api_id, self.api_hash,
|
|
proxy=self._sender.connection.conn.proxy,
|
|
timeout=self._sender.connection.get_timeout()
|
|
)
|
|
|
|
# This will make use of the new RSA keys for this specific CDN.
|
|
#
|
|
# We won't be calling GetConfigRequest because it's only called
|
|
# when needed by ._get_dc, and also it's static so it's likely
|
|
# set already. Avoid invoking non-CDN methods by not syncing updates.
|
|
client.connect(_sync_updates=False)
|
|
return client
|
|
|
|
# endregion
|
|
|
|
# region Invoking Telegram requests
|
|
|
|
@abc.abstractmethod
|
|
def __call__(self: 'TelegramClient', request, ordered=False):
|
|
"""
|
|
Invokes (sends) one or more MTProtoRequests and returns (receives)
|
|
their result.
|
|
|
|
Args:
|
|
request (`TLObject` | `list`):
|
|
The request or requests to be invoked.
|
|
|
|
ordered (`bool`, optional):
|
|
Whether the requests (if more than one was given) should be
|
|
executed sequentially on the server. They run in arbitrary
|
|
order by default.
|
|
|
|
Returns:
|
|
The result of the request (often a `TLObject`) or a list of
|
|
results if more than one request was given.
|
|
"""
|
|
raise NotImplementedError
|
|
|
|
@abc.abstractmethod
|
|
def _handle_update(self: 'TelegramClient', update):
|
|
raise NotImplementedError
|
|
|
|
@abc.abstractmethod
|
|
def _update_loop(self: 'TelegramClient'):
|
|
raise NotImplementedError
|
|
|
|
@abc.abstractmethod
|
|
async def _handle_auto_reconnect(self: 'TelegramClient'):
|
|
raise NotImplementedError
|
|
|
|
# endregion
|