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112 lines
4.0 KiB
Python
112 lines
4.0 KiB
Python
import asyncio
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import time
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from functools import wraps
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from typing import Callable, cast, Optional, Any
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from telegram import Update
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from telegram.ext import filters, CallbackContext
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from utils.log import logger
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_lock = asyncio.Lock()
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def restricts(
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restricts_time: int = 9,
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restricts_time_of_groups: Optional[int] = None,
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return_data: Any = None,
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without_overlapping: bool = False,
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):
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"""用于装饰在指定函数预防洪水攻击的装饰器
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被修饰的函数生声明必须为
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async def command_func(update, context)
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或
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async def command_func(self, update, context
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如果修饰的函数属于
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ConversationHandler
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参数
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return_data
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必须传入
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ConversationHandler.END
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我真™是服了某些闲着没事干的群友了
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:param restricts_time: 基础限制时间
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:param restricts_time_of_groups: 对群限制的时间
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:param return_data: 返回的数据对于 ConversationHandler 需要传入 ConversationHandler.END
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:param without_overlapping: 两次命令时间不覆盖，在上一条一样的命令返回之前，忽略重复调用
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"""
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def decorator(func: Callable):
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@wraps(func)
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async def restricts_func(*args, **kwargs):
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if len(args) == 3:
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# self update context
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_, update, context = args
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elif len(args) == 2:
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# update context
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update, context = args
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else:
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return await func(*args, **kwargs)
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update = cast(Update, update)
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context = cast(CallbackContext, context)
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message = update.effective_message
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user = update.effective_user
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_restricts_time = restricts_time
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if restricts_time_of_groups is not None:
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if filters.ChatType.GROUPS.filter(message):
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_restricts_time = restricts_time_of_groups
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async with _lock:
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user_lock = context.user_data.get("lock")
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if user_lock is None:
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user_lock = context.user_data["lock"] = asyncio.Lock()
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# 如果上一个命令还未完成，忽略后续重复调用
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if without_overlapping and user_lock.locked():
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logger.warning(f"用户 {user.full_name}[{user.id}] 触发 overlapping 该次命令已忽略")
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return return_data
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async with user_lock:
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command_time = context.user_data.get("command_time", 0)
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count = context.user_data.get("usage_count", 0)
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restrict_since = context.user_data.get("restrict_since", 0)
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# 洪水防御
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if restrict_since:
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if (time.time() - restrict_since) >= 60 * 5:
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del context.user_data["restrict_since"]
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del context.user_data["usage_count"]
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else:
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return return_data
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else:
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if count >= 6:
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context.user_data["restrict_since"] = time.time()
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await message.reply_text("你已经触发洪水防御，请等待5分钟")
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logger.warning(f"用户 {user.full_name}[{user.id}] 触发洪水限制 已被限制5分钟")
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return return_data
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# 单次使用限制
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if command_time:
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if (time.time() - command_time) <= _restricts_time:
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context.user_data["usage_count"] = count + 1
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else:
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if count >= 1:
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context.user_data["usage_count"] = count - 1
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context.user_data["command_time"] = time.time()
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# 只需要给 without_overlapping 的代码加锁运行
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if without_overlapping:
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return await func(*args, **kwargs)
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if count > 1:
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await asyncio.sleep(count)
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return await func(*args, **kwargs)
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return restricts_func
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return decorator
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