Middleware Pattern

request.state.user = user response = await call_next(request) return response # Middleware 3: Security and Logging @app.middleware("http") async def security_logging_middleware(request: Request, call_next): # Example se…

return JSONResponse(status_code=401, content={"detail": "Invalid token"}) response = await call_next(request) logging.info(f"Authentication took {time.time() - start_time:.4f} seconds") return response # Middleware …

from fastapi.responses import JSONResponse import logging import time app = FastAPI() # Middleware 1: Request Validation @app.middleware("http") async def validate_request(request: Request, call_next): start_time = time.time() con…

def ingest_data(request: Request): # Check rate limit if request.headers.get("X-RateLimit-Remaining") == "0": return JSONResponse({"message": "Rate limit exceeded"}, status_code=429) # Check timeout start_time =…

reset = limiter.current_limit_reset response.headers["X-RateLimit-Limit"] = str(limiter.current_limit) response.headers["X-RateLimit-Remaining"] = str(remaining) response.headers["X-RateLimit-Reset"]…

4. **Logging**: - Implement logging to capture detailed information about errors for debugging purposes. 5. **Middleware for Error Handling**: - Use middleware to handle exceptions globally and provide consistent error responses. ##…