Kotlin ktor jetty修改响应头部

import io.ktor.application.*
import io.ktor.features.*
import io.ktor.http.*
import io.ktor.response.*
import io.ktor.routing.*
import io.ktor.server.engine.*
import io.ktor.server.jetty.*

fun main() {
    embeddedServer(Jetty, port = 8080) {
        install(StatusPages) {
            exception<Throwable> { cause ->
                call.respond(HttpStatusCode.InternalServerError, "An error occurred: ${cause.message}")
            }
        }

        routing {
            get("/") {
                call.response.headers.append("X-Custom-Header", "CustomValue")
                call.respondText("Hello, World!", ContentType.Text.Plain)
            }
        }
    }.start(wait = true)
}

routing {
    get("/") {
        call.response.headers.append("X-Custom-Header", "CustomValue")
        call.respondText("Hello, World!", ContentType.Text.Plain)
    }
}