35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
"""中间件模块"""
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import asyncio
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import logging
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from starlette.middleware.base import BaseHTTPMiddleware
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from starlette.requests import Request
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from starlette.responses import Response
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from config import MAX_CONCURRENT_REQUESTS
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logger = logging.getLogger(__name__)
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class ConcurrencyLimitMiddleware(BaseHTTPMiddleware):
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"""并发限制中间件 - 防止内存爆炸"""
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def __init__(self, app, max_concurrent: int = MAX_CONCURRENT_REQUESTS):
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super().__init__(app)
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self.semaphore = asyncio.Semaphore(max_concurrent)
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self.max_concurrent = max_concurrent
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logger.info(f"并发限制中间件已启用，最大并发数：{max_concurrent}")
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async def dispatch(self, request: Request, call_next) -> Response:
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"""处理请求"""
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async with self.semaphore:
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try:
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response = await call_next(request)
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return response
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except Exception as e:
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logger.error(f"请求处理错误: {e}", exc_info=True)
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return Response(
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content='{"error": "Internal Server Error"}',
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status_code=500,
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media_type="application/json"
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)
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