加入限流策略,一个群一分钟只能获取5张图来
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46
utils/decorator/rate_limit_decorator.py
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46
utils/decorator/rate_limit_decorator.py
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import time
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import functools
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from typing import Callable, Any, Dict, Tuple, Optional
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from loguru import logger
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# 本地缓存,主键为 (group_id, feature_key)
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_rate_limit_cache: Dict[Tuple[str, str], list] = {}
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def group_feature_rate_limit(max_per_minute: int = 3, feature_key: str = None):
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"""
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用于插件异步消息处理的限流装饰器,按 group_id 和 FEATURE_KEY 作为主键,每分钟最多允许 N 次。
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Args:
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max_per_minute: 每分钟最大允许次数
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feature_key: 功能权限键名(可选,优先使用参数,其次用 self.FEATURE_KEY)
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用法:
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@group_feature_rate_limit(max_per_minute=3, feature_key="DAILY_NEWS")
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async def process_message(self, plugin_msg):
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...
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"""
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def decorator(func: Callable) -> Callable:
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@functools.wraps(func)
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async def async_wrapper(self, message: Dict[str, Any], *args, **kwargs) -> Tuple[bool, str]:
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group_id = message.get("roomid")
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# 优先用参数,其次用 self.FEATURE_KEY
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_feature_key = feature_key or getattr(self, "FEATURE_KEY", None)
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if not group_id or not _feature_key:
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# 缺少主键信息,不限流
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return await func(self, message, *args, **kwargs)
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now = time.time()
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key = (str(group_id), str(_feature_key))
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times = _rate_limit_cache.get(key, [])
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# 只保留最近60秒内的记录
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times = [t for t in times if now - t < 60]
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if len(times) >= max_per_minute:
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logger.info(
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f"限流: group_id={group_id}, feature_key={_feature_key}, {len(times)}/{max_per_minute} 次/分钟")
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return False, f"触发频率过高,请稍后再试(限{max_per_minute}次/分钟)"
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times.append(now)
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_rate_limit_cache[key] = times
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return await func(self, message, *args, **kwargs)
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return async_wrapper
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return decorator
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