Add rate-limiting but it doesn't work.

app/config.py

@@ -25,6 +25,11 @@ class Settings(BaseSettings):
     dd_env: str = Field(default="development", alias="DD_ENV")
     dd_version: str = Field(default="1.0.0", alias="DD_VERSION")
 
+    # Rate limiting settings
+    rate_limit_enabled: bool = Field(default=True, alias="RATE_LIMIT_ENABLED")
+    rate_limit_requests: int = Field(default=100, alias="RATE_LIMIT_REQUESTS")
+    rate_limit_period: str = Field(default="1/minute", alias="RATE_LIMIT_PERIOD")
+
     class Config:
         env_file = ".env"
         case_sensitive = False

app/middleware.py

@@ -12,7 +12,10 @@ from app.logging import get_logger
 logger = get_logger(__name__)
 
 # Rate limiter
-limiter = Limiter(key_func=get_remote_address)
+limiter = Limiter(
+    key_func=get_remote_address,
+    default_limits=[f"{settings.rate_limit_requests}/{settings.rate_limit_period}"] if settings.rate_limit_enabled else []
+)
 
 
 async def logging_middleware(request: Request, call_next: Callable) -> Response:

main.py

@@ -5,10 +5,13 @@ import sentry_sdk
 from ddtrace import patch_all
 from fastapi import APIRouter, FastAPI
 from sentry_sdk.integrations.fastapi import FastApiIntegration
+from slowapi import _rate_limit_exceeded_handler
+from slowapi.errors import RateLimitExceeded
+from slowapi.middleware import SlowAPIMiddleware
 
 from app.config import settings
 from app.logging import configure_logging, get_logger
-from app.middleware import logging_middleware
+from app.middleware import logging_middleware, limiter
 from app.resources import health
 
 
@@ -41,6 +44,15 @@ def create_app() -> FastAPI:
         redoc_url="/redoc",
     )
     
+    # Add rate limiting middleware if enabled
+    if settings.rate_limit_enabled:
+        app.state.limiter = limiter
+        app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)
+        app.add_middleware(SlowAPIMiddleware)
+
+    # Add logging middleware
+    app.middleware("http")(logging_middleware)
+    
     # Include all endpoint routers
     app.include_router(health.router, tags=["health"])