How to build nested routes in Ktor? - kotlin

Question

I defined my routes in the separate file:
PostRoutes.kt:
fun Route.getPostsRoute() {
get("/posts") {
call.respondText("Posts")
}
}
// Some other routes
fun Application.postRoutes() {
routing {
getPostsRoute()
// Some other routes
}
}
And I setup these routes in Application.kt as it shown below:
fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)
fun Application.module(testing: Boolean = false) {
routing { // I want to provide the root endpoint (/api/v1) here
postRoutes()
}
}
How can I setup my root endpoint (/api/v1) in this case?
P.S. I've checked their docs, it says to use nested routes but I can't because I need to call routing in postRoutes() that breaks nested routes.
P.P.S. I am a noobie in Ktor and Kotlin.

Answer 1

You can either wrap the getPostsRoute() with the route("/api/v1") inside the postRoutes method or get rid of the postRoutes method and nest your routes inside the routing {}.
import io.ktor.application.*
import io.ktor.response.*
import io.ktor.routing.*
import io.ktor.server.engine.*
import io.ktor.server.netty.*
fun main() {
embeddedServer(Netty, port = 5555, host = "0.0.0.0") {
postRoutes()
}.start(wait = false)
}
fun Route.getPostsRoute() {
get("/posts") {
call.respondText("Posts")
}
}
fun Application.postRoutes() {
routing {
route("/api/v1") {
getPostsRoute()
}
}
}