RoutingApplicationCall.kt

import io.ktor.application.*
import io.ktor.http.HttpMethod
import io.ktor.pipeline.PipelinePhase
import io.ktor.response.respond
import io.ktor.routing.Routing
import io.ktor.routing.RoutingApplicationCall
import io.ktor.routing.route
import io.ktor.server.engine.embeddedServer
import io.ktor.server.jetty.Jetty
import io.ktor.util.AttributeKey


object CustomCallLoggingInterceptor : ApplicationFeature<Application, Unit, Unit> {
  override val key: AttributeKey<Unit> = AttributeKey("Call Logging")

  override fun install(pipeline: Application, configure: Unit.() -> Unit) {
    val loggingPhase = PipelinePhase("Logging")
    pipeline.insertPhaseBefore(ApplicationCallPipeline.Infrastructure, loggingPhase)
    pipeline.intercept(loggingPhase) {
      try {
        proceed()
        println((call as? RoutingApplicationCall)?.route)
      } catch (e: Throwable) {
        println((call as? RoutingApplicationCall)?.route)
      }
    }
  }
}

object App {
  @JvmStatic
  fun main(args: Array<String>) {

    embeddedServer(Jetty, port = 8080) {
      install(CustomCallLoggingInterceptor)
      install(Routing) {
        route("route") {
          route("one", HttpMethod.Get) {
            handle {
              this.call.respond("OK")
            }
          }
        }
      }
    }.start()
  }
}