How do I make a JsonSerializer for the Ktor client...

# ktor

[dave08]

How do I make a JsonSerializer for the Ktor client JsonFeature for Klaxon? I have this:

class KlaxonSerializer(block: Klaxon.() -> Unit = {}) : JsonSerializer {

	private val backend: Klaxon = Klaxon().apply(block)

	override fun write(data: Any): OutgoingContent = TextContent(backend.toJsonString(data), ContentType.Application.Json)

	override suspend fun read(info: TypeInfo, response: HttpResponse): Any {
		val text= response.readText()
		return backend.parse(text) as info.type
	}
}

but obviously info.type won't work there and the parse function takes a reified type...

[Deactivated User]

https://github.com/ktorio/ktor/blob/master/ktor-features/ktor-jackson/src/io/ktor/jackson/JacksonConverter.kt#L30

[Deactivated User]

type.javaObjectType?

[dave08]

The info is red there...

[dave08]

And I mean for the Client not server...

[Deactivated User]

Oh

[Deactivated User]

let me check

[Deactivated User]

https://github.com/ktorio/ktor/blob/master/ktor-client/ktor-client-features/ktor-client-json/src/io/ktor/client/features/json/GsonSerializer.kt#L10

[Deactivated User]

.reifiedType?

[Deactivated User]

why do you need the as?

[dave08]

Where do I put it? I can't do parse<type.reifiedType>(json)

[dave08]

I need to tell Klaxon what class to parse to somehow..

[dave08]

And Any return type won't help...

[Deactivated User]

has klaxon a non-reified version of the method?

[Deactivated User]

receiving a KClass or KType?

[Deactivated User]

and why don’t use gson directly?

[dave08]

It looks not so easy... I think they call internally...

Klaxon has a handy feature to annotate a field and link that to a custom field converter...

[Deactivated User]

https://github.com/cbeust/klaxon/blob/26cb28861d332df3f675f31967428e4887547907/src/main/kotlin/com/beust/klaxon/Klaxon.kt

[Deactivated User]

Klaxon.parser(clazz).parse(StringReader(json))

[dave08]

So like this: backend.parser(info.type).parse(StringReader(text))!!, right?

[Deactivated User]

I guess so

[Deactivated User]

worked for you?

[dave08]

I still have one more problem to solve before I'll know... Thanks!