Custom JSON mapping with Jackson

[milosmns]

Ktor Version

1.2.2

Feedback

I'm using Jackson mapping in the Client (here: https://ktor.io/clients/http-client/features/json-feature.html), but there seems to be no way to configure the mapper. Normally, I would just include a custom-configured object mapper (the same way I do for server component), but here it's just a single-constructor class tha explicitly calls for the default mapper inside.

Can we get a configuration param for the object mapper? Alternatively, a builder to specify it.

[oleg-larshin]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.

[cy6erGn0m]

This is already done.

val client = HttpClient(HttpClientEngine) {
    install(JsonFeature) {
        serializer = JacksonSerializer {
            // configure ObjectMapper
        }
    }
}

Alternatively, you can specify an ObjectMapper instance

val client = HttpClient(HttpClientEngine) {
    install(JsonFeature) {
        serializer = JacksonSerializer(jackson = myInstance)
    }
}