Kotlin ktor jetty修改响应头部

import io.ktor.application.*
import io.ktor.features.ContentNegotiation
import io.ktor.features.StatusPages
import io.ktor.http.HttpHeaders
import io.ktor.http.HttpStatusCode
import io.ktor.jackson.jackson
import io.ktor.request.receive
import io.ktor.response.respond
import io.ktor.routing.*
import io.ktor.server.engine.embeddedServer
import io.ktor.server.jetty.Jetty

data class MyResponse(val message: String)

fun Application.module() {
    install(ContentNegotiation) {
        jackson {
            // 配置JSON序列化和反序列化
        }
    }

    install(StatusPages) {
        exception<Throwable> { cause ->
            call.respond(HttpStatusCode.InternalServerError, MyResponse(cause.message ?: "Unknown error"))
        }
    }

    routing {
        get("/") {
            call.response.headers.append(HttpHeaders.XPoweredBy, "Kotlin Ktor Jetty")
            call.respond(MyResponse("Hello, World!"))
        }
    }
}

fun main() {
    embeddedServer(Jetty, port = 8080, module = Application::module).start(wait = true)
}