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from math import ceil
from typing import NoReturn
from fastapi import Request , Response
from starlette . websockets import WebSocket
from app . core . exceptions import CustomException
def http_limit_callback ( request : Request , response : Response , expire : int ) - > NoReturn :
"""
HTTP 触发限流时的默认回调：抛出 429。
参数:
- request (Request): 当前请求。
- response (Response): 当前响应（未直接使用，保留与限流器签名一致）。
- expire (int): 剩余冷却毫秒数。
返回:
- 无（始终抛出 CustomException）
"""
expires = ceil ( expire / 30 )
raise CustomException (
status_code = 429 ,
msg = " 请求过于频繁，请稍后重试！ " ,
data = { " Retry-After " : str ( expires ) } ,
)
async def ws_limit_callback ( ws : WebSocket , expire : int ) - > None :
"""
WebSocket 触发限流时的默认回调：关闭连接。
参数:
- ws (WebSocket): 当前 WebSocket。
- expire (int): 剩余冷却毫秒数。
返回:
- None
"""
expires = ceil ( expire / 30 )
await ws . close ( code = 1008 , reason = f " 请求过于频繁，请稍后重试！ { expires } 秒后重试 " )