Hey :wave: I'm trying to use <ktor in Kotlin notebook> (`%use ktor-client`). I need to configure a D...

# ktor

[Lam Pham]

Hey 👋
I'm trying to use ktor in Kotlin notebook (%use ktor-client). I need to configure a DataConversion to convert String to kotlin LocalDateTime object.
However, the conversion doesn't seem to be triggered 🧵

[Lam Pham]

Here is the code

http.config {
    install(DataConversion) {
        convert<LocalDateTime> {
            decode { values ->
                println("Decoding")
                ...
            }

            encode { dates ->
                println("Encoding")
            }
        }
    }
}.get($url) {
    ...
}.body<Response>()

I consistently get Illegal input: java.time.format.DateTimeParseException: Text '20240808T164502+0100' could not be parsed at index 0
None of the println is executed.
Do I miss anything?

[Chrimaeon]

I guess you need ContentNegotiation instead of DataConversion
https://ktor.io/docs/client-serialization.html#serialization_dependency

[Aleksei Tirman [JB]]

As far as I can see, the DataConversion plugin for the client side has an empty implementation of the install method, so it does nothing. You can use this plugin for the server, though.

[Lam Pham]

@Aleksei Tirman [JB] the thing is there's no plugin for the server in kotlin notebook.ktor-client is the only lib available
@Chrimaeon I can't really see how to do make it with ContentNegociation
anyway, I had to work around by using an intermediate object (with all String fields) and manually do the conversion