axum-core-router

Router<S> is the central routing type in Axum. It maps request paths to handlers through method-routers, composes sub-routers, and is itself a tower::Service. The generic S is the state type the router still requires; a serveable router is Router<()>.

When To Use This Skill

• Defining routes with .route() and method-routers
• Mounting sub-routers with .nest() or flattening them with .merge()
• Wiring middleware with .layer() or .route_layer()
• The server panics at startup with a routing or path message
• A request returns 404 where 405 is expected, or the reverse
• Middleware runs on some routes but not others

Quick Reference

Router methods (axum 0.7 and 0.8 share these signatures)