如何将文件上传到restful api kotlin

import io.ktor.application.*
import io.ktor.features.ContentNegotiation
import io.ktor.features.StatusPages
import io.ktor.http.HttpStatusCode
import io.ktor.http.content.PartData
import io.ktor.http.content.forEachPart
import io.ktor.http.content.streamProvider
import io.ktor.jackson.jackson
import io.ktor.request.receiveMultipart
import io.ktor.response.respond
import io.ktor.routing.post
import io.ktor.routing.routing
import io.ktor.server.engine.embeddedServer
import io.ktor.server.netty.Netty

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

fun Application.module() {
    install(ContentNegotiation) {
        jackson { }
    }

    install(StatusPages) {
        exception<Throwable> { cause ->
            call.respond(HttpStatusCode.InternalServerError, cause.localizedMessage)
        }
    }

    routing {
        post("/upload") {
            val multipart = call.receiveMultipart()
            var fileName = ""

            multipart.forEachPart { part ->
                when (part) {
                    is PartData.FileItem -> {
                        val originalFileName = part.originalFileName ?: ""
                        fileName = "uploaded_$originalFileName"
                        val fileBytes = part.streamProvider().readBytes()
                        // 保存文件到服务器或其他存储介质中
                        // ...
                    }
                }
                part.dispose()
            }

            call.respond(HttpStatusCode.OK, "File uploaded successfully: $fileName")
        }
    }
}