修复限流器问题

backend/middleware/rate_limit.py

@@ -11,19 +11,24 @@ from fastapi import Request, HTTPException
 from slowapi import Limiter, _rate_limit_exceeded_handler
 from slowapi.util import get_remote_address
 from slowapi.errors import RateLimitExceeded
+from slowapi.extension import RateLimitDecorator
 from ..config import settings
 
+# 创建限流器
 limiter = Limiter(key_func=get_remote_address)
 
 def setup_rate_limit(app):
+    """配置限流"""
     if settings.RATE_LIMIT_ENABLED:
         app.state.limiter = limiter
         app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)
 
 def rate_limit(requests: int = None, period: int = None):
+    """限流装饰器工厂 - 修复版本"""
     if not settings.RATE_LIMIT_ENABLED:
         return lambda func: func
-
+    
     req = requests or settings.RATE_LIMIT_REQUESTS
     per = period or settings.RATE_LIMIT_PERIOD
+    
     return limiter.limit(f"{req}/{per} seconds")