如何在 ktor 的 api 调用响应中获取错误消息

Question

我正在学习 Ktor。我想打印错误值或异常。我从这个中提取了一些代码。我不完全理解这个 post 答案。

ApiResponse.kt

sealed class ApiResponse<out T : Any> {
    data class Success<out T : Any>(
        val data: T?
    ) : ApiResponse<T>()

    data class Error(
        val responseCode: Int = -1,
    ) : ApiResponse<Nothing>()

    fun handleResult(onSuccess: ((responseData: T?) -> Unit)?, onError: ((error: Error) -> Unit)?) {
        when (this) {
            is Success -> {
                onSuccess?.invoke(this.data)
            }
            is Error -> {
                onError?.invoke(this)
            }
        }
    }
}

@Serializable
data class ErrorResponse(
    var errorCode: Int = 1,
    val errorMessage: String = "Something went wrong"
)

KtorApi.kt

class KtorApi(private val httpClient: HttpClient) : NetworkRoute() {
    suspend fun getCat(): Response<CatResponse> {
        val response = httpClient.get {
            url("https://xyz/cat")
        }
        return apiCall(response)
    }
}

CatResponse.kt

@Serializable
data class CatResponse(
    val items: List<CatDetails>? = null
)

@Serializable
data class CatDetails(
    val id: String? = null,
    val name: String? = null,
)

ViewModel.kt

fun getCat() {
        viewModelScope.launch {
            KtorApi.getCat().handleResult({ data ->
                logE("Success on cat api response->>> $data")
            }) { error ->
                logE("Error on cat api ->>>> $error ")
            }
        }
   }

这里我已经成功的从Success中获取了数据，但是我不知道如何获取error或者error中的exception。

actual fun httpClient(config: HttpClientConfig<*>.() -> Unit) = HttpClient(OkHttp) {
    config(this)
    install(Logging) {
        logger = Logger.SIMPLE
        level = LogLevel.BODY
    }
    expectSuccess = false
    install(ContentNegotiation) {
        json(Json {
            prettyPrint = true
            ignoreUnknownKeys = true
            explicitNulls = false
        })
    }
}

如何在错误数据 class 中传递异常或错误代码、状态、正文？有人对此有想法吗？

Answer 1

对于 kotlin 挂起函数，您需要使用 try/catch 块来捕获错误：

val apiResponse = try {
    ApiResponse.Success(KtorApi.getCat())
} catch (e: ClientRequestException) {
    ApiResponse.Error(e.response.status)
} catch (e: Exeption) {
    // some other error
    ApiResponse.Error()
}

如何在 ktor 的 api 调用响应中获取错误消息

How to get error message in api call response in ktor

android

kotlin

ktor

kotlin-multiplatform-mobile