refactor(middleware): 移除慢请求监控中间件及其测试

移除SlowRequestMiddleware及其相关测试文件，简化中间件堆栈

fastapi/applications.py

@@ -13,7 +13,6 @@ from fastapi.exception_handlers import (
 from fastapi.exceptions import RequestValidationError, WebSocketRequestValidationError
 from fastapi.logger import logger
 from fastapi.middleware.asyncexitstack import AsyncExitStackMiddleware
-from fastapi.middleware.slow_request import SlowRequestMiddleware
 from fastapi.openapi.docs import (
     get_redoc_html,
     get_swagger_ui_html,
@@ -1030,8 +1029,7 @@ class FastAPI(Starlette):
                 exception_handlers[key] = value
 
         middleware = (
-            [Middleware(SlowRequestMiddleware)]
+            [Middleware(ServerErrorMiddleware, handler=error_handler, debug=debug)]  # ty: ignore[invalid-argument-type]
-            + [Middleware(ServerErrorMiddleware, handler=error_handler, debug=debug)]  # ty: ignore[invalid-argument-type]
             + self.user_middleware
             + [
                 Middleware(

tests/test_slow_request_middleware.py

@@ -1,53 +0,0 @@
-import asyncio
-import logging
-import time
-
-from fastapi import FastAPI
-from fastapi.testclient import TestClient
-
-app = FastAPI()
-
-
-@app.get("/fast")
-async def fast_endpoint():
-    return {"message": "Fast response"}
-
-
-@app.get("/slow")
-async def slow_endpoint():
-    await asyncio.sleep(0.6)
-    return {"message": "Slow response"}
-
-
-def test_slow_request_logging(caplog):
-    caplog.set_level(logging.WARNING)
-    client = TestClient(app)
-
-    # 测试快速请求，不应记录警告
-    response = client.get("/fast")
-    assert response.status_code == 200
-    assert "Slow request" not in caplog.text
-
-    # 测试慢速请求，应记录警告
-    response = client.get("/slow")
-    assert response.status_code == 200
-
-    # 检查日志是否包含预期的警告信息
-    slow_request_logs = [record for record in caplog.records if "Slow request" in record.message]
-    assert len(slow_request_logs) == 1
-
-    log_message = slow_request_logs[0].message
-    assert "GET" in log_message
-    assert "/slow" in log_message
-    # 检查是否包含两位小数的时间
-    import re
-    match = re.search(r"took (\d+\.\d{2})s", log_message)
-    assert match is not None, f"Log message should contain time with two decimal places: {log_message}"
-
-    print("✅ 慢请求监控中间件测试通过！")
-    print(f"   日志消息: {log_message}")
-
-
-if __name__ == "__main__":
-    import pytest
-    pytest.main([__file__, "-v", "-s"])