Not able to post request using ktor client in kotlin js

Question

Am trying to make an http post request but it is getting failed for reasons am not able to understand.

object KtorClient {
val client = HttpClient() {
    install(JsonFeature) {
        serializer = KotlinxSerializer()
    }
 }
}
suspend fun createOwner(url : String = "http://localhost:112/company/owner/register", ownerMapper: OwnerMapper) {
println(ownerMapper)
client.post<Unit>(url){
   body = ownerMapper
}
}

BlockquoteIllegalStateException {message_8yp7un$_0: "Fail to send body. Content has type: class OwnerMapper, but OutgoingContent expected.", cause_th0jdv$_0: null, stack: "captureStack↵Exception↵RuntimeException↵IllegalSta…↵↵↵↵↵↵↵↵↵↵↵↵↵↵↵↵↵promiseReactionJob@[native code]", name: "IllegalStateException"}

After adding Serialization plugin, am getting this error:

"Can't locate argument-less serializer for class OwnerMapper. For generic classes, such as lists, please provide serializer explicitly."

I have followed the official example but not able to make it run. Am using Kotlin/Js and above error is coming from browser.

score 1 · Accepted Answer · answered Jul 20 '20 at 12:11

    val client = HttpClient() {
        install(JsonFeature){
            serializer = KotlinxSerializer()
        }
    }
@Serializable
data class OwnerLoginMapper(
    val email: String? = null,
    val username: String? = null,
    val number: String? = null,
    val credential: String
)
@Serializable
data class Token(
    val token : String
)
var response = client.post<Token>(url){
    contentType(ContentType.Application.Json)
    body = ownerMapper
}
println(response.token)

Add these dependencies:

implementation("io.ktor:ktor-client-json-js:1.3.2")
implementation("io.ktor:ktor-client-serialization-js:1.3.2")
implementation("org.jetbrains.kotlinx:kotlinx-serialization-runtime-js:0.20.0")

Apply this plugin:

    kotlin("plugin.serialization") version "1.3.70"

PS: Choose appropriate version number.

score 0 · Answer 2 · answered Jul 16 '20 at 18:31

0

Is your OwnerMapper class marked as @Serializable ?

If no -- please mark it as @Serializable

If yes -- could you please try to reproduce the second problem ("Can't locate argument-less serializer for class OwnerMapper. For generic classes, such as lists, please provide serializer explicitly.") without Ktor. To me it looks as a problem with serialization, probably some dependency is missing.

Please, also take a look at the github issue: https://github.com/Kotlin/kotlinx.serialization/issues/278

answered Jul 16 '20 at 18:31

Brilyantov Vadim

76
2

It is marked as serializable, currently am manually serializing instead of installing feature in ktor client. As manual serializatioj is working so I guess dependency are complete, it seems something wrong with ktor client. I will try to seperate out the problem and debug. – Tarun Chawla Jul 17 '20 at 02:34
@TarunChawla Can you attach a link to your project? – vanyochek Jul 17 '20 at 12:38
I was doing few things wrong here. I will post the answer to do it right way. – Tarun Chawla Jul 20 '20 at 12:07

Not able to post request using ktor client in kotlin js

2 Answers2