Custom Middleware
Write ASGI middleware in FastAPI for request logging, request ID injection, timing, and response transformation.
CORS Configuration
Configure CORS in FastAPI with CORSMiddleware — allowed origins, credentials, methods, headers, and environment-based origin lists.
Trust and Proxy Headers
Configure FastAPI to trust X-Forwarded-For and X-Forwarded-Proto headers from Nginx or a load balancer using ProxyHeadersMiddleware.