ln-773-cors-configurator

To configure secure CORS policies for FastAPI and ASP.NET Core, use environment-aware middleware generation that auto-detects frontend origins and outputs environment-specific configuration files with safe defaults.

Environment-aware CORS rules are set up by detecting development versus production needs, then generating distinct allowed origins, methods, and credentials settings for each environment to prevent data leaks.

You cannot use wildcard origins with credentials in CORS middleware. Secure configuration enforces validation that blocks wildcard origins when credentials are allowed, ensuring safe defaults.

This CORS configurator supports idempotent middleware checks, verifying existing middleware before applying environment-specific configurations to prevent duplicate entries and ensure safe integration.

The best way to auto-detect frontend origins for web API CORS settings is using environment-aware policy generation that identifies frontend URLs and outputs ready-to-run app settings or middleware configuration code files.

CORS configuration blocks legitimate traffic in production when rules are too restrictive or misconfigured. Environment-aware policy generation auto-detects valid frontend origins to create appropriate rules that prevent blocking.