I get "kotlinx/coroutines/io/ByteReadChannel" when I try to decode a json on server side with ktor and moshi

Question

In Application.kt I install moshi in Application.module

   install(ContentNegotiation){
        moshi()
    }

I declared a simple test calss and in the route I try to decode the test class:

data class Test(val testString: String)

fun Route.test() {
    post (TEST_ENDPOINT) {
        val testReceive = call.receive<Test>()
        call.respond(testReceive)
    }

The request is post with the following Headers and Body:

Accept: */*
Accept-Encoding: gzip, deflate
Content-Type: application/json
Accept-Language: en-gb

{
  "testString": "dasdada"
}

Response headers:

HTTP/1.1 500 Internal Server Error

Date: Mon, 05 Oct 2020 11:55:58 GMT
Content-Length: 37
Connection: keep-alive
Content-Type: text/plain; charset=UTF-8
Server: ktor-server-core/1.4.1 ktor-server-core/1.4.1

Response body:

kotlinx/coroutines/io/ByteReadChannel

Any suggestion or comment is appreciated.

Answer 1

Moshi 1.0.1 relies on some outdated Ktor API. Consider either moving back to Ktor 1.3.2 or (better) use another JSON handler (there are several available out of the box: Gson, Jackson and kotlinx.serialization)