Hi folks, i am using springboot with koltin with f...

# spring

[George]

Hi folks, i am using springboot with koltin with functional apis.
I trying to handle common exceptions in incoming request. More specifically, i try to separate serialization exception and publisher exceptions in ServerRequest.awaitBody() like this:

suspend inline fun <reified T : Any> ServerRequest.awaitAndReceive(): T {
    val body = awaitBodyOrNull<String>()
    requireNotNull(body) { bodyTypeErrorMessage<T>() }
    return deserializeBody(body)
}

inline fun <reified T : Any> deserializeBody(body: String): T {
    try {
        return Json.decodeFromString<T>(body)
    } catch (e: IllegalArgumentException) {
        throw IllegalArgumentException(bodyTypeErrorMessage<T>())
    }
}

Question is: do i deserialize the request two times in this case? 1 for awaitBodyOrNull<String>() and 1 manually?

[George]

Answering my own question for anyone interested:
After playing around with the debugger i figured out that indeed this triggers 2 deserializations (tbh that's the expected).

But it turns out for now the KotlinSerializationStringDecoder, also deserializes it in two steps (like my code pretty much), though this is a current limitation from kotlinx.serialization and will probably lifted in future.