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dj
79 lines
3.2 KiB
Python
79 lines
3.2 KiB
Python
# - *- coding: utf- 8 - *-
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import time
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from typing import Any, Awaitable, Callable, Dict, Optional, Union
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from aiogram import BaseMiddleware
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from aiogram.dispatcher.flags import get_flag
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from aiogram.types import CallbackQuery, Message, TelegramObject, User
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from cachetools import TTLCache
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from tgbot.data.config import BOT_THROTTLE_RATE
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# Простая защита от спама
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class ThrottlingMiddleware(BaseMiddleware):
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def __init__(self, default_rate: Union[int, float] = BOT_THROTTLE_RATE) -> None:
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# Базовая задержка между сообщениями
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self.default_rate = default_rate
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self.message_users = TTLCache(maxsize=10_000, ttl=600)
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self.callback_users = TTLCache(maxsize=10_000, ttl=600)
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async def __call__(self, handler: Callable[[TelegramObject, Dict[str, Any]], Awaitable[Any]], event: TelegramObject, data):
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# Если юзер спамит, постепенно увеличиваем паузу
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this_user: Optional[User] = data.get("event_from_user")
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if this_user is None:
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return await handler(event, data)
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flag_rate = get_flag(data, "rate")
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rate = float(self.default_rate if flag_rate is None else flag_rate)
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if rate == 0:
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return await handler(event, data)
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now_time = time.monotonic()
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bucket = self._get_bucket(event)
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user_key = this_user.id
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if user_key not in bucket:
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bucket[user_key] = {
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'last_throttled': now_time,
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'count_throttled': 0,
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'now_rate': rate,
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}
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return await handler(event, data)
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else:
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if now_time - bucket[user_key]['last_throttled'] >= bucket[user_key]['now_rate']:
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bucket.pop(user_key)
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return await handler(event, data)
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else:
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bucket[user_key]['last_throttled'] = now_time
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bucket[user_key]['count_throttled'] += 1
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if bucket[user_key]['count_throttled'] == 1:
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bucket[user_key]['now_rate'] = rate + 2
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await self._warn_user(event)
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elif bucket[user_key]['count_throttled'] == 2:
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bucket[user_key]['now_rate'] = rate + 3
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else:
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bucket[user_key]['now_rate'] = rate + 5
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return None
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# Для сообщений и колбэков держим разные лимиты, чтобы они не мешали друг другу
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def _get_bucket(self, event: TelegramObject) -> TTLCache:
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if isinstance(event, CallbackQuery):
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return self.callback_users
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return self.message_users
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# Предупреждаем там, где это возможно для конкретного типа апдейта
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async def _warn_user(self, event: TelegramObject) -> None:
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if isinstance(event, Message):
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await event.reply("<b>❗ Пожалуйста, не спамьте</b>")
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elif isinstance(event, CallbackQuery) or hasattr(event, "answer"):
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await event.answer("❗ Пожалуйста, не спамьте", cache_time=1)
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