NewRouter returns a new Router, if app is passed then it is used.

CtxMiddleware is the middlewate with signature func(*base.Context)error.

PlainMiddleware is the middleware with signature func(http.Handler)http.Handler.

ErrRouteStringFormat is returned when the route string is of the wrong format.

Middleware is the utron middleware.

Options additional settings for the router.

Router registers routes and handlers.

MiddlewareType is the kind of middleware.