Oops, one should read the whole question before answering... Just saw that
you already tried that. Unfortunately, it seems that this is indeed a
shortcoming of the current model.
I guess with a bit of fiddling you could try making all of those
marshallers marshal to `Future[HttpResponse]` instead of `HttpResponse` and
then use something like
val toResponseIteratorJsonMarshaller: Marshaller[Iterator[Data],
Future[HttpResponse]] =
Marshaller.withFixedContentType(`application/json`) {
result => httpResponse(result)
}
implicit val toResponseIteratorMarshaller: Marshaller[Iterator[Data],
Future[HttpResponse]] =
Marshaller.oneOf(
toResponseIteratorJsonMarshaller,
toResponseIteratorOdsMarshaller,
toResponseIteratorExcelMarshaller
)
and then in your route:
val responseFuture =
Marshal(data).toResponseFor(request)(toResponseIteratorMarshaller): //
Future[Future[HttpResponse]]
.flatMap(identity)
complete(responseFuture)
Would be interesting to know if that works.
Johannes
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