mirror of
https://github.com/python-telegram-bot/python-telegram-bot.git
synced 2024-11-22 07:06:26 +01:00
664 lines
27 KiB
Python
664 lines
27 KiB
Python
#!/usr/bin/env python
|
|
#
|
|
# A library that provides a Python interface to the Telegram Bot API
|
|
# Copyright (C) 2015-2020
|
|
# Leandro Toledo de Souza <devs@python-telegram-bot.org>
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser 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 Lesser Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser Public License
|
|
# along with this program. If not, see [http://www.gnu.org/licenses/].
|
|
"""This module contains the Dispatcher class."""
|
|
|
|
import logging
|
|
import warnings
|
|
import weakref
|
|
from collections import defaultdict
|
|
from functools import wraps
|
|
from queue import Empty, Queue
|
|
from threading import BoundedSemaphore, Event, Lock, Thread, current_thread
|
|
from time import sleep
|
|
from typing import TYPE_CHECKING, Any, Callable, DefaultDict, Dict, List, Optional, Set, Union
|
|
from uuid import uuid4
|
|
|
|
from telegram import TelegramError, Update
|
|
from telegram.ext import BasePersistence
|
|
from telegram.ext.callbackcontext import CallbackContext
|
|
from telegram.ext.handler import Handler
|
|
from telegram.utils.deprecate import TelegramDeprecationWarning
|
|
from telegram.utils.promise import Promise
|
|
from telegram.utils.types import HandlerArg
|
|
|
|
if TYPE_CHECKING:
|
|
from telegram import Bot
|
|
from telegram.ext import JobQueue
|
|
|
|
DEFAULT_GROUP: int = 0
|
|
|
|
|
|
def run_async(
|
|
func: Callable[[Update, CallbackContext], Any]
|
|
) -> Callable[[Update, CallbackContext], Any]:
|
|
"""
|
|
Function decorator that will run the function in a new thread.
|
|
|
|
Will run :attr:`telegram.ext.Dispatcher.run_async`.
|
|
|
|
Using this decorator is only possible when only a single Dispatcher exist in the system.
|
|
|
|
Note:
|
|
DEPRECATED. Use :attr:`telegram.ext.Dispatcher.run_async` directly instead or the
|
|
:attr:`Handler.run_async` parameter.
|
|
|
|
Warning:
|
|
If you're using ``@run_async`` you cannot rely on adding custom attributes to
|
|
:class:`telegram.ext.CallbackContext`. See its docs for more info.
|
|
"""
|
|
|
|
@wraps(func)
|
|
def async_func(*args: Any, **kwargs: Any) -> Any:
|
|
warnings.warn(
|
|
'The @run_async decorator is deprecated. Use the `run_async` parameter of'
|
|
'`Dispatcher.add_handler` or `Dispatcher.run_async` instead.',
|
|
TelegramDeprecationWarning,
|
|
stacklevel=2,
|
|
)
|
|
return Dispatcher.get_instance()._run_async( # pylint: disable=W0212
|
|
func, *args, update=None, error_handling=False, **kwargs
|
|
)
|
|
|
|
return async_func
|
|
|
|
|
|
class DispatcherHandlerStop(Exception):
|
|
"""
|
|
Raise this in handler to prevent execution any other handler (even in different group).
|
|
|
|
In order to use this exception in a :class:`telegram.ext.ConversationHandler`, pass the
|
|
optional ``state`` parameter instead of returning the next state:
|
|
|
|
.. code-block:: python
|
|
|
|
def callback(update, context):
|
|
...
|
|
raise DispatcherHandlerStop(next_state)
|
|
|
|
Attributes:
|
|
state (:obj:`object`): Optional. The next state of the conversation.
|
|
|
|
Args:
|
|
state (:obj:`object`, optional): The next state of the conversation.
|
|
"""
|
|
|
|
def __init__(self, state: object = None) -> None:
|
|
super().__init__()
|
|
self.state = state
|
|
|
|
|
|
class Dispatcher:
|
|
"""This class dispatches all kinds of updates to its registered handlers.
|
|
|
|
Attributes:
|
|
bot (:class:`telegram.Bot`): The bot object that should be passed to the handlers.
|
|
update_queue (:obj:`Queue`): The synchronized queue that will contain the updates.
|
|
job_queue (:class:`telegram.ext.JobQueue`): Optional. The :class:`telegram.ext.JobQueue`
|
|
instance to pass onto handler callbacks.
|
|
workers (:obj:`int`, optional): Number of maximum concurrent worker threads for the
|
|
``@run_async`` decorator and :meth:`run_async`.
|
|
user_data (:obj:`defaultdict`): A dictionary handlers can use to store data for the user.
|
|
chat_data (:obj:`defaultdict`): A dictionary handlers can use to store data for the chat.
|
|
bot_data (:obj:`dict`): A dictionary handlers can use to store data for the bot.
|
|
persistence (:class:`telegram.ext.BasePersistence`): Optional. The persistence class to
|
|
store data that should be persistent over restarts.
|
|
|
|
Args:
|
|
bot (:class:`telegram.Bot`): The bot object that should be passed to the handlers.
|
|
update_queue (:obj:`Queue`): The synchronized queue that will contain the updates.
|
|
job_queue (:class:`telegram.ext.JobQueue`, optional): The :class:`telegram.ext.JobQueue`
|
|
instance to pass onto handler callbacks.
|
|
workers (:obj:`int`, optional): Number of maximum concurrent worker threads for the
|
|
``@run_async`` decorator and :meth:`run_async`. Defaults to 4.
|
|
persistence (:class:`telegram.ext.BasePersistence`, optional): The persistence class to
|
|
store data that should be persistent over restarts.
|
|
use_context (:obj:`bool`, optional): If set to :obj:`True` uses the context based callback
|
|
API (ignored if `dispatcher` argument is used). Defaults to :obj:`True`.
|
|
**New users**: set this to :obj:`True`.
|
|
|
|
"""
|
|
|
|
__singleton_lock = Lock()
|
|
__singleton_semaphore = BoundedSemaphore()
|
|
__singleton = None
|
|
logger = logging.getLogger(__name__)
|
|
|
|
def __init__(
|
|
self,
|
|
bot: 'Bot',
|
|
update_queue: Queue,
|
|
workers: int = 4,
|
|
exception_event: Event = None,
|
|
job_queue: 'JobQueue' = None,
|
|
persistence: BasePersistence = None,
|
|
use_context: bool = True,
|
|
):
|
|
self.bot = bot
|
|
self.update_queue = update_queue
|
|
self.job_queue = job_queue
|
|
self.workers = workers
|
|
self.use_context = use_context
|
|
|
|
if not use_context:
|
|
warnings.warn(
|
|
'Old Handler API is deprecated - see https://git.io/fxJuV for details',
|
|
TelegramDeprecationWarning,
|
|
stacklevel=3,
|
|
)
|
|
|
|
self.user_data: DefaultDict[int, Dict[Any, Any]] = defaultdict(dict)
|
|
self.chat_data: DefaultDict[int, Dict[Any, Any]] = defaultdict(dict)
|
|
self.bot_data = {}
|
|
self.persistence: Optional[BasePersistence] = None
|
|
self._update_persistence_lock = Lock()
|
|
if persistence:
|
|
if not isinstance(persistence, BasePersistence):
|
|
raise TypeError("persistence must be based on telegram.ext.BasePersistence")
|
|
self.persistence = persistence
|
|
self.persistence.set_bot(self.bot)
|
|
if self.persistence.store_user_data:
|
|
self.user_data = self.persistence.get_user_data()
|
|
if not isinstance(self.user_data, defaultdict):
|
|
raise ValueError("user_data must be of type defaultdict")
|
|
if self.persistence.store_chat_data:
|
|
self.chat_data = self.persistence.get_chat_data()
|
|
if not isinstance(self.chat_data, defaultdict):
|
|
raise ValueError("chat_data must be of type defaultdict")
|
|
if self.persistence.store_bot_data:
|
|
self.bot_data = self.persistence.get_bot_data()
|
|
if not isinstance(self.bot_data, dict):
|
|
raise ValueError("bot_data must be of type dict")
|
|
else:
|
|
self.persistence = None
|
|
|
|
self.handlers: Dict[int, List[Handler]] = {}
|
|
"""Dict[:obj:`int`, List[:class:`telegram.ext.Handler`]]: Holds the handlers per group."""
|
|
self.groups: List[int] = []
|
|
"""List[:obj:`int`]: A list with all groups."""
|
|
self.error_handlers: Dict[Callable, bool] = {}
|
|
"""Dict[:obj:`callable`, :obj:`bool`]: A dict, where the keys are error handlers and the
|
|
values indicate whether they are to be run asynchronously."""
|
|
|
|
self.running = False
|
|
""":obj:`bool`: Indicates if this dispatcher is running."""
|
|
self.__stop_event = Event()
|
|
self.__exception_event = exception_event or Event()
|
|
self.__async_queue: Queue = Queue()
|
|
self.__async_threads: Set[Thread] = set()
|
|
|
|
# For backward compatibility, we allow a "singleton" mode for the dispatcher. When there's
|
|
# only one instance of Dispatcher, it will be possible to use the `run_async` decorator.
|
|
with self.__singleton_lock:
|
|
if self.__singleton_semaphore.acquire(blocking=False):
|
|
self._set_singleton(self)
|
|
else:
|
|
self._set_singleton(None)
|
|
|
|
@property
|
|
def exception_event(self) -> Event:
|
|
return self.__exception_event
|
|
|
|
def _init_async_threads(self, base_name: str, workers: int) -> None:
|
|
base_name = '{}_'.format(base_name) if base_name else ''
|
|
|
|
for i in range(workers):
|
|
thread = Thread(
|
|
target=self._pooled, name='Bot:{}:worker:{}{}'.format(self.bot.id, base_name, i)
|
|
)
|
|
self.__async_threads.add(thread)
|
|
thread.start()
|
|
|
|
@classmethod
|
|
def _set_singleton(cls, val: Optional['Dispatcher']) -> None:
|
|
cls.logger.debug('Setting singleton dispatcher as %s', val)
|
|
cls.__singleton = weakref.ref(val) if val else None
|
|
|
|
@classmethod
|
|
def get_instance(cls) -> 'Dispatcher':
|
|
"""Get the singleton instance of this class.
|
|
|
|
Returns:
|
|
:class:`telegram.ext.Dispatcher`
|
|
|
|
Raises:
|
|
RuntimeError
|
|
|
|
"""
|
|
if cls.__singleton is not None:
|
|
return cls.__singleton() # type: ignore[return-value] # pylint: disable=not-callable
|
|
raise RuntimeError('{} not initialized or multiple instances exist'.format(cls.__name__))
|
|
|
|
def _pooled(self) -> None:
|
|
thr_name = current_thread().getName()
|
|
while 1:
|
|
promise = self.__async_queue.get()
|
|
|
|
# If unpacking fails, the thread pool is being closed from Updater._join_async_threads
|
|
if not isinstance(promise, Promise):
|
|
self.logger.debug(
|
|
"Closing run_async thread %s/%d", thr_name, len(self.__async_threads)
|
|
)
|
|
break
|
|
|
|
promise.run()
|
|
|
|
if not promise.exception:
|
|
self.update_persistence(update=promise.update)
|
|
continue
|
|
|
|
if isinstance(promise.exception, DispatcherHandlerStop):
|
|
self.logger.warning(
|
|
'DispatcherHandlerStop is not supported with async functions; func: %s',
|
|
promise.pooled_function.__name__,
|
|
)
|
|
continue
|
|
|
|
# Avoid infinite recursion of error handlers.
|
|
if promise.pooled_function in self.error_handlers:
|
|
self.logger.error('An uncaught error was raised while handling the error.')
|
|
continue
|
|
|
|
# Don't perform error handling for a `Promise` with deactivated error handling. This
|
|
# should happen only via the deprecated `@run_async` decorator or `Promises` created
|
|
# within error handlers
|
|
if not promise.error_handling:
|
|
self.logger.error('A promise with deactivated error handling raised an error.')
|
|
continue
|
|
|
|
# If we arrive here, an exception happened in the promise and was neither
|
|
# DispatcherHandlerStop nor raised by an error handler. So we can and must handle it
|
|
try:
|
|
self.dispatch_error(promise.update, promise.exception, promise=promise)
|
|
except Exception:
|
|
self.logger.exception('An uncaught error was raised while handling the error.')
|
|
|
|
def run_async(
|
|
self, func: Callable[..., Any], *args: Any, update: HandlerArg = None, **kwargs: Any
|
|
) -> Promise:
|
|
"""
|
|
Queue a function (with given args/kwargs) to be run asynchronously. Exceptions raised
|
|
by the function will be handled by the error handlers registered with
|
|
:meth:`add_error_handler`.
|
|
|
|
Warning:
|
|
* If you're using ``@run_async``/:meth:`run_async` you cannot rely on adding custom
|
|
attributes to :class:`telegram.ext.CallbackContext`. See its docs for more info.
|
|
* Calling a function through :meth:`run_async` from within an error handler can lead to
|
|
an infinite error handling loop.
|
|
|
|
Args:
|
|
func (:obj:`callable`): The function to run in the thread.
|
|
*args (:obj:`tuple`, optional): Arguments to ``func``.
|
|
update (:class:`telegram.Update`, optional): The update associated with the functions
|
|
call. If passed, it will be available in the error handlers, in case an exception
|
|
is raised by :attr:`func`.
|
|
**kwargs (:obj:`dict`, optional): Keyword arguments to ``func``.
|
|
|
|
Returns:
|
|
Promise
|
|
|
|
"""
|
|
return self._run_async(func, *args, update=update, error_handling=True, **kwargs)
|
|
|
|
def _run_async(
|
|
self,
|
|
func: Callable[..., Any],
|
|
*args: Any,
|
|
update: HandlerArg = None,
|
|
error_handling: bool = True,
|
|
**kwargs: Any,
|
|
) -> Promise:
|
|
# TODO: Remove error_handling parameter once we drop the @run_async decorator
|
|
promise = Promise(func, args, kwargs, update=update, error_handling=error_handling)
|
|
self.__async_queue.put(promise)
|
|
return promise
|
|
|
|
def start(self, ready: Event = None) -> None:
|
|
"""Thread target of thread 'dispatcher'.
|
|
|
|
Runs in background and processes the update queue.
|
|
|
|
Args:
|
|
ready (:obj:`threading.Event`, optional): If specified, the event will be set once the
|
|
dispatcher is ready.
|
|
|
|
"""
|
|
if self.running:
|
|
self.logger.warning('already running')
|
|
if ready is not None:
|
|
ready.set()
|
|
return
|
|
|
|
if self.__exception_event.is_set():
|
|
msg = 'reusing dispatcher after exception event is forbidden'
|
|
self.logger.error(msg)
|
|
raise TelegramError(msg)
|
|
|
|
self._init_async_threads(str(uuid4()), self.workers)
|
|
self.running = True
|
|
self.logger.debug('Dispatcher started')
|
|
|
|
if ready is not None:
|
|
ready.set()
|
|
|
|
while 1:
|
|
try:
|
|
# Pop update from update queue.
|
|
update = self.update_queue.get(True, 1)
|
|
except Empty:
|
|
if self.__stop_event.is_set():
|
|
self.logger.debug('orderly stopping')
|
|
break
|
|
if self.__exception_event.is_set():
|
|
self.logger.critical('stopping due to exception in another thread')
|
|
break
|
|
continue
|
|
|
|
self.logger.debug('Processing Update: %s', update)
|
|
self.process_update(update)
|
|
self.update_queue.task_done()
|
|
|
|
self.running = False
|
|
self.logger.debug('Dispatcher thread stopped')
|
|
|
|
def stop(self) -> None:
|
|
"""Stops the thread."""
|
|
if self.running:
|
|
self.__stop_event.set()
|
|
while self.running:
|
|
sleep(0.1)
|
|
self.__stop_event.clear()
|
|
|
|
# async threads must be join()ed only after the dispatcher thread was joined,
|
|
# otherwise we can still have new async threads dispatched
|
|
threads = list(self.__async_threads)
|
|
total = len(threads)
|
|
|
|
# Stop all threads in the thread pool by put()ting one non-tuple per thread
|
|
for i in range(total):
|
|
self.__async_queue.put(None)
|
|
|
|
for i, thr in enumerate(threads):
|
|
self.logger.debug('Waiting for async thread %s/%s to end', i + 1, total)
|
|
thr.join()
|
|
self.__async_threads.remove(thr)
|
|
self.logger.debug('async thread %s/%s has ended', i + 1, total)
|
|
|
|
@property
|
|
def has_running_threads(self) -> bool:
|
|
return self.running or bool(self.__async_threads)
|
|
|
|
def process_update(self, update: Union[str, Update, TelegramError]) -> None:
|
|
"""Processes a single update.
|
|
|
|
Args:
|
|
update (:obj:`str` | :class:`telegram.Update` | :class:`telegram.TelegramError`):
|
|
The update to process.
|
|
|
|
"""
|
|
|
|
# An error happened while polling
|
|
if isinstance(update, TelegramError):
|
|
try:
|
|
self.dispatch_error(None, update)
|
|
except Exception:
|
|
self.logger.exception('An uncaught error was raised while handling the error.')
|
|
return
|
|
|
|
context = None
|
|
|
|
for group in self.groups:
|
|
try:
|
|
for handler in self.handlers[group]:
|
|
check = handler.check_update(update)
|
|
if check is not None and check is not False:
|
|
if not context and self.use_context:
|
|
context = CallbackContext.from_update(update, self)
|
|
handler.handle_update(update, self, check, context)
|
|
|
|
# If handler runs async updating immediately doesn't make sense
|
|
if not handler.run_async:
|
|
self.update_persistence(update=update)
|
|
break
|
|
|
|
# Stop processing with any other handler.
|
|
except DispatcherHandlerStop:
|
|
self.logger.debug('Stopping further handlers due to DispatcherHandlerStop')
|
|
self.update_persistence(update=update)
|
|
break
|
|
|
|
# Dispatch any error.
|
|
except Exception as exc:
|
|
try:
|
|
self.dispatch_error(update, exc)
|
|
except DispatcherHandlerStop:
|
|
self.logger.debug('Error handler stopped further handlers')
|
|
break
|
|
# Errors should not stop the thread.
|
|
except Exception:
|
|
self.logger.exception('An uncaught error was raised while handling the error.')
|
|
|
|
def add_handler(self, handler: Handler, group: int = DEFAULT_GROUP) -> None:
|
|
"""Register a handler.
|
|
|
|
TL;DR: Order and priority counts. 0 or 1 handlers per group will be used. End handling of
|
|
update with :class:`telegram.ext.DispatcherHandlerStop`.
|
|
|
|
A handler must be an instance of a subclass of :class:`telegram.ext.Handler`. All handlers
|
|
are organized in groups with a numeric value. The default group is 0. All groups will be
|
|
evaluated for handling an update, but only 0 or 1 handler per group will be used. If
|
|
:class:`telegram.ext.DispatcherHandlerStop` is raised from one of the handlers, no further
|
|
handlers (regardless of the group) will be called.
|
|
|
|
The priority/order of handlers is determined as follows:
|
|
|
|
* Priority of the group (lower group number == higher priority)
|
|
* The first handler in a group which should handle an update (see
|
|
:attr:`telegram.ext.Handler.check_update`) will be used. Other handlers from the
|
|
group will not be used. The order in which handlers were added to the group defines the
|
|
priority.
|
|
|
|
Args:
|
|
handler (:class:`telegram.ext.Handler`): A Handler instance.
|
|
group (:obj:`int`, optional): The group identifier. Default is 0.
|
|
|
|
"""
|
|
# Unfortunately due to circular imports this has to be here
|
|
from .conversationhandler import ConversationHandler # pylint: disable=C0415
|
|
|
|
if not isinstance(handler, Handler):
|
|
raise TypeError('handler is not an instance of {}'.format(Handler.__name__))
|
|
if not isinstance(group, int):
|
|
raise TypeError('group is not int')
|
|
if isinstance(handler, ConversationHandler) and handler.persistent and handler.name:
|
|
if not self.persistence:
|
|
raise ValueError(
|
|
"ConversationHandler {} can not be persistent if dispatcher has no "
|
|
"persistence".format(handler.name)
|
|
)
|
|
handler.persistence = self.persistence
|
|
handler.conversations = self.persistence.get_conversations(handler.name)
|
|
|
|
if group not in self.handlers:
|
|
self.handlers[group] = list()
|
|
self.groups.append(group)
|
|
self.groups = sorted(self.groups)
|
|
|
|
self.handlers[group].append(handler)
|
|
|
|
def remove_handler(self, handler: Handler, group: int = DEFAULT_GROUP) -> None:
|
|
"""Remove a handler from the specified group.
|
|
|
|
Args:
|
|
handler (:class:`telegram.ext.Handler`): A Handler instance.
|
|
group (:obj:`object`, optional): The group identifier. Default is 0.
|
|
|
|
"""
|
|
if handler in self.handlers[group]:
|
|
self.handlers[group].remove(handler)
|
|
if not self.handlers[group]:
|
|
del self.handlers[group]
|
|
self.groups.remove(group)
|
|
|
|
def update_persistence(self, update: HandlerArg = None) -> None:
|
|
"""Update :attr:`user_data`, :attr:`chat_data` and :attr:`bot_data` in :attr:`persistence`.
|
|
|
|
Args:
|
|
update (:class:`telegram.Update`, optional): The update to process. If passed, only the
|
|
corresponding ``user_data`` and ``chat_data`` will be updated.
|
|
"""
|
|
with self._update_persistence_lock:
|
|
self.__update_persistence(update)
|
|
|
|
def __update_persistence(self, update: HandlerArg = None) -> None:
|
|
if self.persistence:
|
|
# We use list() here in order to decouple chat_ids from self.chat_data, as dict view
|
|
# objects will change, when the dict does and we want to loop over chat_ids
|
|
chat_ids = list(self.chat_data.keys())
|
|
user_ids = list(self.user_data.keys())
|
|
|
|
if isinstance(update, Update):
|
|
if update.effective_chat:
|
|
chat_ids = [update.effective_chat.id]
|
|
else:
|
|
chat_ids = []
|
|
if update.effective_user:
|
|
user_ids = [update.effective_user.id]
|
|
else:
|
|
user_ids = []
|
|
|
|
if self.persistence.store_bot_data:
|
|
try:
|
|
self.persistence.update_bot_data(self.bot_data)
|
|
except Exception as exc:
|
|
try:
|
|
self.dispatch_error(update, exc)
|
|
except Exception:
|
|
message = (
|
|
'Saving bot data raised an error and an '
|
|
'uncaught error was raised while handling '
|
|
'the error with an error_handler'
|
|
)
|
|
self.logger.exception(message)
|
|
if self.persistence.store_chat_data:
|
|
for chat_id in chat_ids:
|
|
try:
|
|
self.persistence.update_chat_data(chat_id, self.chat_data[chat_id])
|
|
except Exception as exc:
|
|
try:
|
|
self.dispatch_error(update, exc)
|
|
except Exception:
|
|
message = (
|
|
'Saving chat data raised an error and an '
|
|
'uncaught error was raised while handling '
|
|
'the error with an error_handler'
|
|
)
|
|
self.logger.exception(message)
|
|
if self.persistence.store_user_data:
|
|
for user_id in user_ids:
|
|
try:
|
|
self.persistence.update_user_data(user_id, self.user_data[user_id])
|
|
except Exception as exc:
|
|
try:
|
|
self.dispatch_error(update, exc)
|
|
except Exception:
|
|
message = (
|
|
'Saving user data raised an error and an '
|
|
'uncaught error was raised while handling '
|
|
'the error with an error_handler'
|
|
)
|
|
self.logger.exception(message)
|
|
|
|
def add_error_handler(
|
|
self,
|
|
callback: Callable[[Any, CallbackContext], None],
|
|
run_async: bool = False, # pylint: disable=W0621
|
|
) -> None:
|
|
"""Registers an error handler in the Dispatcher. This handler will receive every error
|
|
which happens in your bot.
|
|
|
|
Note:
|
|
Attempts to add the same callback multiple times will be ignored.
|
|
|
|
Warning:
|
|
The errors handled within these handlers won't show up in the logger, so you
|
|
need to make sure that you reraise the error.
|
|
|
|
Args:
|
|
callback (:obj:`callable`): The callback function for this error handler. Will be
|
|
called when an error is raised. Callback signature for context based API:
|
|
|
|
``def callback(update: Update, context: CallbackContext)``
|
|
|
|
The error that happened will be present in context.error.
|
|
run_async (:obj:`bool`, optional): Whether this handlers callback should be run
|
|
asynchronously using :meth:`run_async`. Defaults to :obj:`False`.
|
|
|
|
Note:
|
|
See https://git.io/fxJuV for more info about switching to context based API.
|
|
"""
|
|
if callback in self.error_handlers:
|
|
self.logger.debug('The callback is already registered as an error handler. Ignoring.')
|
|
return
|
|
self.error_handlers[callback] = run_async
|
|
|
|
def remove_error_handler(self, callback: Callable[[Any, CallbackContext], None]) -> None:
|
|
"""Removes an error handler.
|
|
|
|
Args:
|
|
callback (:obj:`callable`): The error handler to remove.
|
|
|
|
"""
|
|
self.error_handlers.pop(callback, None)
|
|
|
|
def dispatch_error(
|
|
self, update: Optional[HandlerArg], error: Exception, promise: Promise = None
|
|
) -> None:
|
|
"""Dispatches an error.
|
|
|
|
Args:
|
|
update (:obj:`str` | :class:`telegram.Update` | None): The update that caused the error
|
|
error (:obj:`Exception`): The error that was raised.
|
|
promise (:class:`telegram.utils.Promise`, optional): The promise whose pooled function
|
|
raised the error.
|
|
|
|
"""
|
|
async_args = None if not promise else promise.args
|
|
async_kwargs = None if not promise else promise.kwargs
|
|
|
|
if self.error_handlers:
|
|
for callback, run_async in self.error_handlers.items(): # pylint: disable=W0621
|
|
if self.use_context:
|
|
context = CallbackContext.from_error(
|
|
update, error, self, async_args=async_args, async_kwargs=async_kwargs
|
|
)
|
|
if run_async:
|
|
self.run_async(callback, update, context, update=update)
|
|
else:
|
|
callback(update, context)
|
|
else:
|
|
if run_async:
|
|
self.run_async(callback, self.bot, update, error, update=update)
|
|
else:
|
|
callback(self.bot, update, error)
|
|
|
|
else:
|
|
self.logger.exception(
|
|
'No error handlers are registered, logging exception.', exc_info=error
|
|
)
|