小编Tim*_*hin的帖子

我正在尝试按照Codelab使用房间数据库作为事实来源和 RemoteMediator 来实现 Jetpack paging 3 库。该应用程序查询 google books api，但由于某种原因，当我执行搜索时，它会多次调用同一页面。例如，当我在不滚动的情况下搜索 fire 时，我会在日志中看到以下内容：

D/BooksRepository: new search: fire
D/BooksRemoteMediator: title: fire, page: 0
I/okhttp.OkHttpClient: --> GET https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=0
I/okhttp.OkHttpClient: <-- 200 https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=0 (648ms, unknown-length body)
D/BooksRemoteMediator: title: fire, page: 1
I/okhttp.OkHttpClient: --> GET https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=1
I/okhttp.OkHttpClient: <-- 200 https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=1 (608ms, unknown-length body)
D/BooksRemoteMediator: title: fire, page: 0
I/okhttp.OkHttpClient: --> GET https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=0
I/okhttp.OkHttpClient: <-- 200 https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=0 (629ms, unknown-length body)
D/BooksRemoteMediator: title: fire, page: 1
I/okhttp.OkHttpClient: --> GET https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=1
I/okhttp.OkHttpClient: <-- 200 https://www.googleapis.com/books/v1/volumes?q=intitle%3Afire&key=AIzaSyBxHmT9nFCp9n2uOHkS3Gcq2OO3zbxaMrw&maxResults=40&startIndex=1 (843ms, …

我正在尝试学习使用 ktor，并且正在尝试在根路径处显示文本“Hello Ktor”，但我一直得到的结果是无法访问该网站。这是我的代码：

import io.ktor.application.*
import io.ktor.http.ContentType
import io.ktor.response.respondText
import io.ktor.routing.get
import io.ktor.routing.routing

fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)

private val userData = "{\"users\": [\"Timi\", \"Tomi\", \"Temi\"]}"

@Suppress("unused") // Referenced in application.conf
@kotlin.jvm.JvmOverloads
fun Application.module(testing: Boolean = false) {

    routing {
        get("/") {
            call.respondText("Hello Ktor", ContentType.Text.Plain)
        }

    }
}

我究竟做错了什么？