CORS in Rust Actix-web: Options, Pros, and Pitfalls
CORS in Actix-web is one of those things that looks trivial until your frontend starts failing with mysterious preflight errors at 2 AM. Rust gives you strong guarantees around memory safety. CORS gives you sharp edges around browser behavior. Different problem space entirely. If you’re building APIs with Actix-web, you’ll usually end up choosing between a few practical CORS strategies: * for public APIs strict allowlists for browser apps dynamic origin handling for multi-tenant setups “just reflect the origin” hacks you probably shouldn’t ship I’ll compare those approaches, show where Actix-web fits well, and point out the tradeoffs that actually matter in production. ...