Good to know! I will have case classes anyway.
On Mon, Nov 21, 2016 at 9:55 AM, Konrad Malawski <
konrad.malaw...@typesafe.com> wrote:
> You have sadly bumped into an weird edge case here, this API was designed
> mostly for streaming case classes in mind,
> as streaming primitives may be a nice hello world but rarely is the thing
> one wants I think...
>
> To workaround the limitation you can provide an explicit marshaller that
> exposes the String as application/json value:
>
> implicit val stringFormat = Marshaller[String, ByteString] { ec ⇒ s ⇒
> Future.successful {
> List(Marshalling.WithFixedContentType(ContentTypes.`application/json`, ()
> ⇒
> ByteString("\"" + s + "\"")) // "raw string" to be rendered as json
> element in our stream must be enclosed by ""
> )
> }
> }
>
>
> with this it'll work. The issue is that while we do provide marshallers
> for String, they're of type text/plain, which the streaming infrastructure
> looks at and decides "oh, I can't use that, I'm supposed to stream json".
> Eventually it runs out of options and does not marshall anything...
>
> I've made a PR which makes this an explicit error now, and we'll discuss
> in the team how to provide better compile time safety for this.
> Please track the issue 424 for more discussion on this.
>
>
> PS: For case classes, e.g. using spray-json or any json library to
> generate the marshallers (see akka-http-json) it'll work properly.
>
>
> On Mon, Nov 21, 2016 at 3:47 PM, Konrad Malawski <
> konrad.malaw...@typesafe.com> wrote:
>
>> Thanks for reporting Richard - seems there's a bug somewhere, I'm looking
>> into it.
>> Seems it doesn't compose nicely with existing predefined primitive
>> marshallers (like String here), if it was wrapped in a type (say
>> Thing("One") then it works, which is what all our tests were doing).
>>
>> Please track this issue to be informed about progress:
>> https://github.com/akka/akka-http/issues/424
>>
>> --
>> Konrad
>>
>> On Sat, Nov 19, 2016 at 1:55 AM, Richard Rodseth <rrods...@gmail.com>
>> wrote:
>>
>>> Trying this out for the first time. I get a 200 OK but empty body.
>>>
>>> val eventsRoute = path("events") {
>>>
>>> get {
>>>
>>> //val results: List[String] = List("One", "Two", "Three")
>>>
>>> val results: Source[String, NotUsed] = Source(List("One", "Two",
>>> "Three"))
>>>
>>> complete(results)
>>>
>>> }
>>>
>>> }
>>>
>>> The actor that defines the Route mixes in a trait with:
>>>
>>> val start = ByteString.empty
>>>
>>> val sep = ByteString("\n")
>>>
>>> val end = ByteString.empty
>>>
>>> implicit val jsonStreamingSupport = EntityStreamingSupport.json()
>>>
>>> .withFramingRenderer(Flow[ByteString].intersperse(start, sep, end))
>>>
>>>
>>> --
>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c
>>> urrent/additional/faq.html
>>> >>>>>>>>>> Search the archives: https://groups.google.com/grou
>>> p/akka-user
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>>
>>
>>
>> --
>> Cheers,
>> Konrad 'ktoso' Malawski
>> Akka <http://akka.io/> @ Typesafe <http://typesafe.com/>
>>
>
>
>
> --
> Cheers,
> Konrad 'ktoso' Malawski
> Akka <http://akka.io/> @ Typesafe <http://typesafe.com/>
>
> --
> >>>>>>>>>> Read the docs: http://akka.io/docs/
> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/
> current/additional/faq.html
> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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