http_advanced.kt

val pingPongHandler: HttpHandler = { _ -> Response(OK).body("pong!") }
val greetHandler: HttpHandler = { req: Request ->
    val name: String? = req.query("name")
    Response(OK).body("hello ${name ?: "unknown!"}")
}
val routing: RoutingHttpHandler = routes(
    "/ping" bind GET to pingPongHandler,
    "/greet" bind GET to greetHandler
)
val requestTimeLogger: Filter = Filter { next: HttpHandler ->
    { request: Request ->
        val start = clock.millis()
        val response = next(request)
        val latency = clock.millis() - start
        logger { "Request to ${request.uri} took ${latency}ms" }
        response
    }
}
val app: HttpHandler =
    ResponseFilters.GZip()
        .then(requestTimeLogger)
        .then(routing)