從 1.6.x 遷移到 2.0.x
本指南提供如何將您的 Ktor 應用程式從 1.6.x 版本遷移到 2.0.x 的說明。
Ktor 伺服器
伺服器程式碼已移至 'io.ktor.server.*' 套件
為了統一並更好地區分伺服器與用戶端 API,伺服器程式碼已移至 io.ktor.server.* 套件 (KTOR-2865)。 這代表您需要更新應用程式中的相依性與匯入,如下所示。
相依性
| 子系統 | 1.6.x | 2.0.0 |
|---|---|---|
| Locations | io.ktor:ktor-locations | io.ktor:ktor-server-locations |
| Webjars | io.ktor:ktor-webjars | io.ktor:ktor-server-webjars |
| AutoHeadResponse | io.ktor:ktor-server-core | io.ktor:ktor-server-auto-head-response |
| StatusPages | io.ktor:ktor-server-core | io.ktor:ktor-server-status-pages |
| CallId | io.ktor:ktor-server-core | io.ktor:ktor-server-call-id |
| DoubleReceive | io.ktor:ktor-server-core | io.ktor:ktor-server-double-receive |
| HTML DSL | io.ktor:ktor-html-builder | io.ktor:ktor-server-html-builder |
| FreeMarker | io.ktor:ktor-freemarker | io.ktor:ktor-server-freemarker |
| Velocity | io.ktor:ktor-velocity | io.ktor:ktor-server-velocity |
| Mustache | io.ktor:ktor-mustache | io.ktor:ktor-server-mustache |
| Thymeleaf | io.ktor:ktor-thymeleaf | io.ktor:ktor-server-thymeleaf |
| Pebble | io.ktor:ktor-pebble | io.ktor:ktor-server-pebble |
| kotlinx.serialization | io.ktor:ktor-serialization | io.ktor:ktor-server-content-negotiation, io.ktor:ktor-serialization-kotlinx-json |
| Gson | io.ktor:ktor-gson | io.ktor:ktor-server-content-negotiation, io.ktor:ktor-serialization-gson |
| Jackson | io.ktor:ktor-jackson | io.ktor:ktor-server-content-negotiation, io.ktor:ktor-serialization-jackson |
| Authentication | io.ktor:ktor-auth | io.ktor:ktor-server-auth |
| JWT authentication | io.ktor:ktor-auth-jwt | io.ktor:ktor-server-auth-jwt |
| LDAP authentication | io.ktor:ktor-auth-ldap | io.ktor:ktor-server-auth-ldap |
| DataConversion | io.ktor:ktor-server-core | io.ktor:ktor-server-data-conversion |
| DefaultHeaders | io.ktor:ktor-server-core | io.ktor:ktor-server-default-headers |
| Compression | io.ktor:ktor-server-core | io.ktor:ktor-server-compression |
| CachingHeaders | io.ktor:ktor-server-core | io.ktor:ktor-server-caching-headers |
| ConditionalHeaders | io.ktor:ktor-server-core | io.ktor:ktor-server-conditional-headers |
| CORS | io.ktor:ktor-server-core | io.ktor:ktor-server-cors |
| Forwarded headers | io.ktor:ktor-server-core | io.ktor:ktor-server-forwarded-header |
| HSTS | io.ktor:ktor-server-core | io.ktor:ktor-server-hsts |
| HttpsRedirect | io.ktor:ktor-server-core | io.ktor:ktor-server-http-redirect |
| PartialContent | io.ktor:ktor-server-core | io.ktor:ktor-server-partial-content |
| WebSockets | io.ktor:ktor-websockets | io.ktor:ktor-server-websockets |
| CallLogging | io.ktor:ktor-server-core | io.ktor:ktor-server-call-logging |
| Micrometer metric | io.ktor:ktor-metrics-micrometer | io.ktor:ktor-server-metrics-micrometer |
| Dropwizard metrics | io.ktor:ktor-metrics | io.ktor:ktor-server-metrics |
| Sessions | io.ktor:ktor-server-core | io.ktor:ktor-server-sessions |
若要一次加入所有外掛程式,可以使用
io.ktor:ktor-server構件。
匯入
| 子系統 | 1.6.x | 2.0.0 |
|---|---|---|
| Application | import io.ktor.application.* | import io.ktor.server.application.* |
| Configuration | import io.ktor.config.* | import io.ktor.server.config.* |
| Routing | import io.ktor.routing.* | import io.ktor.server.routing.* |
| AutoHeadResponse | import io.ktor.features.* | import io.ktor.server.plugins.autohead.* |
| StatusPages | import io.ktor.features.* | import io.ktor.server.plugins.statuspages.* |
| CallId | import io.ktor.features.* | import io.ktor.server.plugins.callid.* |
| DoubleReceive | import io.ktor.features.* | import io.ktor.server.plugins.doublereceive.* |
| Requests | import io.ktor.request.* | import io.ktor.server.request.* |
| Responses | import io.ktor.response.* | import io.ktor.server.response.* |
| Plugins | import io.ktor.features.* | import io.ktor.server.plugins.* |
| Locations | import io.ktor.locations.* | import io.ktor.server.locations.* |
| Static content | import io.ktor.http.content.* | import io.ktor.server.http.content.* |
| HTML DSL | import io.ktor.html.* | import io.ktor.server.html.* |
| FreeMarker | import io.ktor.freemarker.* | import io.ktor.server.freemarker.* |
| Velocity | import io.ktor.velocity.* | import io.ktor.server.velocity.* |
| Mustache | import io.ktor.mustache.* | import io.ktor.server.mustache.* |
| Thymeleaf | import io.ktor.thymeleaf.* | import io.ktor.server.thymeleaf.* |
| Pebble | import io.ktor.pebble.* | import io.ktor.server.pebble.* |
| ContentNegotiation | import io.ktor.features.* | import io.ktor.server.plugins.contentnegotiation.* |
| kotlinx.serialization | import io.ktor.serialization.* | import io.ktor.serialization.kotlinx.json.* |
| Gson | import io.ktor.gson.* | import io.ktor.serialization.gson.* |
| Jackson | import io.ktor.jackson.* | import io.ktor.serialization.jackson.* |
| Authentication | import io.ktor.auth.* | import io.ktor.server.auth.* |
| JWT authentication | import io.ktor.auth.jwt.* | import io.ktor.server.auth.jwt.* |
| LDAP authentication | import io.ktor.auth.ldap.* | import io.ktor.server.auth.ldap.* |
| Sessions | import io.ktor.sessions.* | import io.ktor.server.sessions.* |
| DefaultHeaders | import io.ktor.features.* | import io.ktor.server.plugins.defaultheaders.* |
| Compression | import io.ktor.features.* | import io.ktor.server.plugins.compression.* |
| CachingHeaders | import io.ktor.features.* | import io.ktor.server.plugins.cachingheaders.* |
| ConditionalHeaders | import io.ktor.features.* | import io.ktor.server.plugins.conditionalheaders.* |
| CORS | import io.ktor.features.* | import io.ktor.server.plugins.cors.* |
| Forwarded headers | import io.ktor.features.* | import io.ktor.server.plugins.forwardedheaders.* |
| HSTS | import io.ktor.features.* | import io.ktor.server.plugins.hsts.* |
| HttpsRedirect | import io.ktor.features.* | import io.ktor.server.plugins.httpsredirect.* |
| PartialContent | import io.ktor.features.* | import io.ktor.server.plugins.partialcontent.* |
| WebSockets | import io.ktor.websocket.* | import io.ktor.server.websocket.* |
| CallLogging | import io.ktor.features.* | import io.ktor.server.plugins.callloging.* |
| Micrometer metric | import io.ktor.metrics.micrometer.* | import io.ktor.server.metrics.micrometer.* |
| Dropwizard metrics | import io.ktor.metrics.dropwizard.* | import io.ktor.server.metrics.dropwizard.* |
WebSockets 程式碼已移至 'websockets' 套件
WebSockets 程式碼已從 http-cio 移至 websockets 套件。這需要按照以下方式更新匯入:
| 1.6.x | 2.0.0 |
|---|---|
import io.ktor.http.cio.websocket.* | import io.ktor.websocket.* |
請注意,此變更也會影響用戶端。
Feature 已重新命名為 Plugin
在 Ktor 2.0.0 中,Feature 已重新命名為 Plugin (外掛程式),以更準確地描述攔截請求/回應管線的功能 (KTOR-2326)。 這會影響整個 Ktor API,並需要按照以下說明更新您的應用程式。
匯入
安裝任何外掛程式都需要更新匯入,並且也取決於將伺服器程式碼移至 io.ktor.server.* 套件:
| 1.6.x | 2.0.0 |
|---|---|
import io.ktor.features.* | import io.ktor.server.plugins.* |
自訂外掛程式
將 Feature 重新命名為 Plugin 為與自訂外掛程式相關的 API 帶來了以下變更:
ApplicationFeature介面已重新命名為BaseApplicationPlugin。Features管線階段已重新命名為Plugins。
請注意,從 v2.0.0 開始,Ktor 提供了用於建立自訂外掛程式的新 API。通常情況下,此 API 不需要理解 Ktor 的內部概念,例如管線、階段等。相反地,您可以透過各種處理常式(例如
onCall、onCallReceive、onCallRespond等)存取處理請求和回應的不同階段。您可以從本節了解管線階段如何對應到新 API 中的處理常式:管線階段到新 API 處理常式的映射。
內容交涉與序列化
內容交涉與序列化的伺服器 API 經過重構,以便在伺服器和用戶端之間共用序列化程式庫。 主要變更為:
ContentNegotiation已從ktor-server-core移至獨立的ktor-server-content-negotiation構件。- 序列化程式庫已從
ktor-*移至ktor-serialization-*構件,用戶端也會使用這些構件。
相依性
| 子系統 | 1.6.x | 2.0.0 |
|---|---|---|
| ContentNegotiation | io.ktor:ktor-server-core | io.ktor:ktor-server-content-negotiation |
| kotlinx.serialization | io.ktor:ktor-serialization | io.ktor:ktor-serialization-kotlinx-json |
| Gson | io.ktor:ktor-gson | io.ktor:ktor-serialization-gson |
| Jackson | io.ktor:ktor-jackson | io.ktor:ktor-serialization-jackson |
匯入
| 子系統 | 1.6.x | 2.0.0 |
|---|---|---|
| kotlinx.serialization | import io.ktor.serialization.* | import io.ktor.serialization.kotlinx.json.* |
| Gson | import io.ktor.gson.* | import io.ktor.serialization.gson.* |
| Jackson | import io.ktor.jackson.* | import io.ktor.serialization.jackson.* |
自訂轉換器
由 ContentConverter 介面公開的函式簽章已按以下方式變更:
interface ContentConverter {
suspend fun convertForSend(context: PipelineContext<Any, ApplicationCall>, contentType: ContentType, value: Any): Any?
suspend fun convertForReceive(context: PipelineContext<ApplicationReceiveRequest, ApplicationCall>): Any?
}interface ContentConverter {
suspend fun serialize(contentType: ContentType, charset: Charset, typeInfo: TypeInfo, value: Any): OutgoingContent?
suspend fun deserialize(charset: Charset, typeInfo: TypeInfo, content: ByteReadChannel): Any?
}測試 API
在 v2.0.0 中,Ktor 伺服器使用新的 API 進行測試,這解決了 KTOR-971 中描述的各種問題。主要變更為:
withTestApplication/withApplication函式已替換為新的testApplication函式。- 在
testApplication函式內部,您需要使用現有的 Ktor client 執行個體向伺服器發送請求並驗證結果。 - 若要測試特定功能(例如 Cookie 或 WebSockets),您需要建立新的用戶端執行個體並安裝對應的外掛程式。
讓我們看看將 1.6.x 測試遷移到 2.0.0 的幾個範例:
基本伺服器測試
在下方的測試中,handleRequest 函式被替換為 client.get 請求:
@Test
fun testRootLegacyApi() {
withTestApplication(Application::module) {
handleRequest(HttpMethod.Get, "/").apply {
assertEquals(HttpStatusCode.OK, response.status())
assertEquals("Hello, world!", response.content)
}
}
}@Test
fun testRoot() = testApplication {
val response = client.get("/")
assertEquals(HttpStatusCode.OK, response.status)
assertEquals("Hello, world!", response.bodyAsText())
}x-www-form-urlencoded
在下方的測試中,handleRequest 函式被替換為 client.post 請求:
@Test
fun testPostLegacyApi() = withTestApplication(Application::main) {
with(handleRequest(HttpMethod.Post, "/signup"){
addHeader(HttpHeaders.ContentType, ContentType.Application.FormUrlEncoded.toString())
setBody(listOf("username" to "JetBrains", "email" to "[email protected]", "password" to "foobar", "confirmation" to "foobar").formUrlEncode())
}) {
assertEquals("The 'JetBrains' account is created", response.content)
}
}@Test
fun testPost() = testApplication {
val response = client.post("/signup") {
header(HttpHeaders.ContentType, ContentType.Application.FormUrlEncoded.toString())
setBody(listOf("username" to "JetBrains", "email" to "[email protected]", "password" to "foobar", "confirmation" to "foobar").formUrlEncode())
}
assertEquals("The 'JetBrains' account is created", response.bodyAsText())
}multipart/form-data
要在 v2.0.0 中建置 multipart/form-data,您需要將 MultiPartFormDataContent 傳遞給用戶端的 setBody 函式:
@Test
fun testUploadLegacyApi() = withTestApplication(Application::main) {
with(handleRequest(HttpMethod.Post, "/upload"){
val boundary = "WebAppBoundary"
val fileBytes = File("ktor_logo.png").readBytes()
addHeader(HttpHeaders.ContentType, ContentType.MultiPart.FormData.withParameter("boundary", boundary).toString())
setBody(boundary, listOf(
PartData.FormItem("Ktor logo", { }, headersOf(
HttpHeaders.ContentDisposition,
ContentDisposition.Inline
.withParameter(ContentDisposition.Parameters.Name, "description")
.toString()
)),
PartData.FileItem({ fileBytes.inputStream().asInput() }, {}, headersOf(
HttpHeaders.ContentDisposition,
ContentDisposition.File
.withParameter(ContentDisposition.Parameters.Name, "image")
.withParameter(ContentDisposition.Parameters.FileName, "ktor_logo.png")
.toString()
))
))
}) {
assertEquals("Ktor logo is uploaded to 'uploads/ktor_logo.png'", response.content)
}
}@Test
fun testUpload() = testApplication {
val boundary = "WebAppBoundary"
val response = client.post("/upload") {
setBody(
MultiPartFormDataContent(
formData {
append("description", "Ktor logo")
append("image", File("ktor_logo.png").readBytes(), Headers.build {
append(HttpHeaders.ContentType, "image/png")
append(HttpHeaders.ContentDisposition, "filename=\"ktor_logo.png\"")
})
},
boundary,
ContentType.MultiPart.FormData.withParameter("boundary", boundary)
)
)
}
assertEquals("Ktor logo is uploaded to 'uploads/ktor_logo.png'", response.bodyAsText())
}JSON 資料
在 v.1.6.x 中,您可以使用 kotlinx.serialization 程式庫提供的 Json.encodeToString 函式來序列化 JSON 資料。 在 v2.0.0 中,您需要建立新的用戶端執行個體並安裝 ContentNegotiation 外掛程式,該外掛程式允許以特定格式序列化/反序列化內容:
@Test
fun testPostCustomerLegacyApi() = withTestApplication(Application::main) {
with(handleRequest(HttpMethod.Post, "/customer"){
addHeader(HttpHeaders.ContentType, ContentType.Application.Json.toString())
setBody(Json.encodeToString(Customer(3, "Jet", "Brains")))
}) {
assertEquals("Customer stored correctly", response.content)
assertEquals(HttpStatusCode.Created, response.status())
}
}@Test
fun testPostCustomer() = testApplication {
val client = createClient {
install(ContentNegotiation) {
json()
}
}
val response = client.post("/customer") {
contentType(ContentType.Application.Json)
setBody(Customer(3, "Jet", "Brains"))
}
assertEquals("Customer stored correctly", response.bodyAsText())
assertEquals(HttpStatusCode.Created, response.status)
}在測試期間保留 Cookie
在 v1.6.x 中,cookiesSession 用於在測試時於請求之間保留 Cookie。在 v2.0.0 中,您需要建立新的用戶端執行個體並安裝 HttpCookies 外掛程式:
@Test
fun testRequestsLegacyApi() = withTestApplication(Application::main) {
fun doRequestAndCheckResponse(path: String, expected: String) {
handleRequest(HttpMethod.Get, path).apply {
assertEquals(expected, response.content)
}
}
cookiesSession {
handleRequest(HttpMethod.Get, "/login") {}.apply {}
doRequestAndCheckResponse("/user", "Session ID is 123abc. Reload count is 0.")
doRequestAndCheckResponse("/user", "Session ID is 123abc. Reload count is 1.")
doRequestAndCheckResponse("/user", "Session ID is 123abc. Reload count is 2.")
handleRequest(HttpMethod.Get, "/logout").apply {}
doRequestAndCheckResponse("/user", "Session doesn't exist or is expired.")
}
} @Test
fun testRequests() = testApplication {
val client = createClient {
install(HttpCookies)
}
val loginResponse = client.get("/login")
val response1 = client.get("/user")
assertEquals("Session ID is 123abc. Reload count is 1.", response1.bodyAsText())
val response2 = client.get("/user")
assertEquals("Session ID is 123abc. Reload count is 2.", response2.bodyAsText())
val response3 = client.get("/user")
assertEquals("Session ID is 123abc. Reload count is 3.", response3.bodyAsText())
val logoutResponse = client.get("/logout")
assertEquals("Session doesn't exist or is expired.", logoutResponse.bodyAsText())
}WebSockets
在舊版 API 中,handleWebSocketConversation 用於測試 WebSocket 對話。在 v2.0.0 中,您可以透過使用用戶端提供的 WebSockets 外掛程式來測試 WebSocket 對話:
@Test
fun testConversationLegacyApi() {
withTestApplication(Application::module) {
handleWebSocketConversation("/echo") { incoming, outgoing ->
val greetingText = (incoming.receive() as Frame.Text).readText()
assertEquals("Please enter your name", greetingText)
outgoing.send(Frame.Text("JetBrains"))
val responseText = (incoming.receive() as Frame.Text).readText()
assertEquals("Hi, JetBrains!", responseText)
}
}
} @Test
fun testConversation() {
testApplication {
val client = createClient {
install(WebSockets)
}
client.webSocket("/echo") {
val greetingText = (incoming.receive() as? Frame.Text)?.readText() ?: ""
assertEquals("Please enter your name", greetingText)
send(Frame.Text("JetBrains"))
val responseText = (incoming.receive() as Frame.Text).readText()
assertEquals("Hi, JetBrains!", responseText)
}
}
}DoubleReceive
在 v2.0.0 中,DoubleReceive 外掛程式配置引入了 cacheRawRequest 屬性,其作用與 receiveEntireContent 相反:
- 在 v1.6.x 中,
receiveEntireContent屬性預設為false。 - 在 v2.0.0 中,
cacheRawRequest預設為true。receiveEntireContent屬性已被移除。
Forwarded headers
在 v2.0.0 中,ForwardedHeaderSupport 和 XForwardedHeaderSupport 外掛程式分別重新命名為 ForwardedHeaders 和 XForwardedHeaders。
Caching headers
用於定義快取選項的 options 函式,除了 OutgoingContent 之外,現在還接受 ApplicationCall 作為 Lambda 引數:
install(CachingHeaders) {
options { outgoingContent ->
// ...
}
}install(CachingHeaders) {
options { call, outgoingContent ->
// ...
}
}Conditional headers
用於定義資源版本清單的 version 函式,除了 OutgoingContent 之外,現在還接受 ApplicationCall 作為 Lambda 引數:
install(ConditionalHeaders) {
version { outgoingContent ->
// ...
}
}install(ConditionalHeaders) {
version { call, outgoingContent ->
// ...
}
}CORS
CORS 配置中使用的多個函式已被重新命名:
host->allowHostheader->allowHeadermethod->allowMethod
install(CORS) {
host("0.0.0.0:5000")
header(HttpHeaders.ContentType)
method(HttpMethod.Options)
}install(CORS) {
allowHost("0.0.0.0:5000")
allowHeader(HttpHeaders.ContentType)
allowMethod(HttpMethod.Options)
}MicrometerMetrics
在 v1.6.x 中,baseName 屬性用於指定用於監控 HTTP 請求的 Ktor 指標的基準名稱(前綴)。 預設情況下,其值為 ktor.http.server。 在 v2.0.0 中,baseName 已替換為 metricName,其預設值為 ktor.http.server.requests。
Ktor 用戶端
請求與回應
在 v2.0.0 中,用於發送請求和接收回應的 API 已更新,使其更具一致性且易於發現 (KTOR-29)。
請求函式
具有多個參數的請求函式已被棄用。例如,port 和 path 參數需要替換為 HttpRequestBuilder 公開的 url 參數:
client.get(port = 8080, path = "/customer/3")client.get { url(port = 8080, path = "/customer/3") }HttpRequestBuilder 還允許您在請求函式 Lambda 內部指定額外的請求參數。
請求主體
用於設定請求主體的 HttpRequestBuilder.body 屬性已被 HttpRequestBuilder.setBody 函式替換:
client.post("http://localhost:8080/post") {
body = "Body content"
}client.post("http://localhost:8080/post") {
setBody("Body content")
}回應
在 v2.0.0 中,請求函式(如 get、post、put、submitForm 等)不接受用於接收特定類型物件的泛型引數。 現在所有請求函式都回傳一個 HttpResponse 物件,該物件公開了具有泛型引數的 body 函式,用於接收特定類型的執行個體。 您也可以使用 bodyAsText 或 bodyAsChannel 將內容作為字串或通道接收。
val httpResponse: HttpResponse = client.get("https://ktor.io/")
val stringBody: String = httpResponse.receive()
val byteArrayBody: ByteArray = httpResponse.receive()val httpResponse: HttpResponse = client.get("https://ktor.io/")
val stringBody: String = httpResponse.body()
val byteArrayBody: ByteArray = httpResponse.body()安裝 ContentNegotiation 外掛程式後,您可以按如下方式接收任意物件:
val customer: Customer = client.get("http://localhost:8080/customer/3")val customer: Customer = client.get("http://localhost:8080/customer/3").body()串流回應
由於從請求函式中移除了泛型引數,接收串流回應需要單獨的函式。 為了實現這一點,新增了帶有 prepare 前綴的函式,例如 prepareGet 或 preparePost:
public suspend fun HttpClient.prepareGet(builder: HttpRequestBuilder): HttpStatement
public suspend fun HttpClient.preparePost(builder: HttpRequestBuilder): HttpStatement以下範例顯示在這種情況下如何變更您的程式碼:
client.get<HttpStatement>("https://ktor.io/").execute { httpResponse ->
val channel: ByteReadChannel = httpResponse.receive()
while (!channel.isClosedForRead) {
// Read data
}
}client.prepareGet("https://ktor.io/").execute { httpResponse ->
val channel: ByteReadChannel = httpResponse.body()
while (!channel.isClosedForRead) {
// Read data
}
}您可以在此處找到完整的範例:串流資料。
回應驗證
在 v2.0.0 中,用於回應驗證的 expectSuccess 屬性預設為 false。 這需要對您的程式碼進行以下變更:
- 若要啟用預設驗證並對非 2xx 回應拋出例外,請將
expectSuccess屬性設定為true。 - 如果您使用
handleResponseExceptionWithRequest處理非 2xx 例外,您也需要明確啟用expectSuccess。
HttpResponseValidator
handleResponseException 函式已替換為 handleResponseExceptionWithRequest,這增加了對 HttpRequest 的存取權,以便在例外中提供額外資訊:
HttpResponseValidator {
handleResponseException { exception ->
// ...
}
}HttpResponseValidator {
handleResponseExceptionWithRequest { exception, request ->
// ...
}
}內容交涉與序列化
Ktor 用戶端現在支援內容交涉,並與 Ktor 伺服器共用序列化程式庫。 主要變更為:
JsonFeature已被棄用,取而代之的是ContentNegotiation,可在ktor-client-content-negotiation構件中找到。- 序列化程式庫已從
ktor-client-*移至ktor-serialization-*構件。
相依性
| 子系統 | 1.6.x | 2.0.0 |
|---|---|---|
ContentNegotiation | n/a | io.ktor:ktor-client-content-negotiation |
| kotlinx.serialization | io.ktor:ktor-client-serialization | io.ktor:ktor-serialization-kotlinx-json |
| Gson | io.ktor:ktor-client-gson | io.ktor:ktor-serialization-gson |
| Jackson | io.ktor:ktor-client-jackson | io.ktor:ktor-serialization-jackson |
匯入
| 子系統 | 1.6.x | 2.0.0 |
|---|---|---|
ContentNegotiation | n/a | import io.ktor.client.plugins.contentnegotiation.* |
| kotlinx.serialization | import io.ktor.client.features.json.* | import io.ktor.serialization.kotlinx.json.* |
| Gson | import io.ktor.client.features.json.* | import io.ktor.serialization.gson.* |
| Jackson | import io.ktor.client.features.json.* | import io.ktor.serialization.jackson.* |
Bearer 身分驗證
refreshTokens 函式現在使用 RefreshTokenParams 執行個體作為 Lambda 接收者 (this),而非 HttpResponse Lambda 引數 (it):
bearer {
refreshTokens { // it: HttpResponse
// ...
}
}bearer {
refreshTokens { // this: RefreshTokenParams
// ...
}
}RefreshTokenParams 公開了以下屬性:
response以存取回應參數;client以發送請求來重新整理權杖;oldTokens以存取使用loadTokens取得的權杖。
HttpSend
HttpSend 外掛程式的 API 變更如下:
client[HttpSend].intercept { originalCall, request ->
if (originalCall.something()) {
val newCall = execute(request)
// ...
}
}client.plugin(HttpSend).intercept { request ->
val originalCall = execute(request)
if (originalCall.something()) {
val newCall = execute(request)
// ...
}
}請注意,在 v2.0.0 中,索引存取不適用於存取外掛程式。請改用 HttpClient.plugin 函式。
HttpClient.get(plugin: HttpClientPlugin) 函式已移除
在 2.0.0 版本中,接受用戶端外掛程式的 HttpClient.get 函式已被移除。請改用 HttpClient.plugin 函式。
client.get(HttpSend).intercept { ... }
// 或
client[HttpSend].intercept { ... }client.plugin(HttpSend).intercept { ... }Feature 已重新命名為 Plugin
與 Ktor 伺服器相同,在用戶端 API 中,Feature 已重新命名為 Plugin。 這可能會影響您的應用程式,如下所示。
匯入
更新用於安裝外掛程式的匯入:
| 子系統 | 1.6.x | 2.0.0 |
| import io.ktor.client.features.* | import io.ktor.client.plugins.* |
身分驗證 The Auth plugin handles authentication and authorization in your client application. | import io.ktor.client.features.auth.* import io.ktor.client.features.auth.providers.* | import io.ktor.client.plugins.auth.* import io.ktor.client.plugins.auth.providers.* |
Cookies The HttpCookies plugin handles cookies automatically and keep them between calls in a storage. | import io.ktor.client.features.cookies.* | import io.ktor.client.plugins.cookies.* |
Logging Required dependencies: io.ktor:ktor-client-logging Code example: %example_name% | import io.ktor.client.features.logging.* | import io.ktor.client.plugins.logging.* |
WebSockets The Websockets plugin allows you to create a multi-way communication session between a server and a client. | import io.ktor.client.features.websocket.* | import io.ktor.client.plugins.websocket.* |
Content encoding The ContentEncoding plugin allows you to enable specified compression algorithms (such as 'gzip' and 'deflate') and configure their settings. | import io.ktor.client.features.compression.* | import io.ktor.client.plugins.compression.* |
自訂外掛程式
HttpClientFeature 介面已重新命名為 HttpClientPlugin。
用於 Native 目標的新記憶體模型
在 v2.0.0 中,在 Native 目標上使用 Ktor 用戶端需要啟用新的 Kotlin/Native 記憶體模型:啟用新 MM。
從 v2.2.0 開始,新的 Kotlin/Native 記憶體模型已預設啟用。
'Ios' 引擎已重新命名為 'Darwin'
鑑於 Ios 引擎不僅鎖定 iOS,還鎖定包括 macOS 或 tvOS 在內的其他作業系統,在 v2.0.0 中,它被重新命名為 Darwin。這導致了以下變更:
io.ktor:ktor-client-ios構件已重新命名為io.ktor:ktor-client-darwin。- 要建立
HttpClient執行個體,您需要傳遞Darwin類別作為引數。 IosClientEngineConfig配置類別已重新命名為DarwinClientEngineConfig。
要了解如何配置 Darwin 引擎,請參閱 Darwin 章節。
WebSockets 程式碼已移至 'websockets' 套件
WebSockets 程式碼已從 http-cio 移至 websockets 套件。這需要按照以下方式更新匯入:
| 1.6.x | 2.0.0 |
|---|---|
import io.ktor.http.cio.websocket.* | import io.ktor.websocket.* |
預設請求
DefaultRequest 外掛程式使用 DefaultRequestBuilder 配置類別,而非 HttpRequestBuilder:
val client = HttpClient(CIO) {
defaultRequest {
// this: HttpRequestBuilder
}
}val client = HttpClient(CIO) {
defaultRequest {
// this: DefaultRequestBuilder
}
}