NotFound 🔗

How to customize 404 NotFound handler?

Use the notFoundHandler parameter of UndertowSharafServer:

            val customNotFoundHandler: Request => Response[?] = req =>
  Response.withBody(MyCustomNotFoundPage)
    .withStatus(StatusCode.NotFound)

val server = UndertowSharafServer(
    "localhost",
    port,
    routes,
    notFoundHandler = customNotFoundHandler
  )

          

You can use the request if you need to dynamically decide on what to return.
Or ignore it and return a static not found response.