On Friday, June 12, 2015 at 12:30:16 AM UTC+2, [email protected] wrote:
>
> I think ContentType is modeled directly on HttpEntity. Try a combination
> of the mapResponseEntity-directive and the .withContentType-method on
> HttpEntity.
>
To expand on this:
In spray/akka-http some headers are treated specially because they
logically belong somewhere else in the model. The content type is one of
them which tightly belongs to the entity (= body) of an HTTP message in our
view. (Also see the docs at [1] about this topic.)
So, how do you work with content-types?
There are basically two levels:
1) you construct the response manually with types from the model
2) you use the routing layer with `complete` and marshalling
In the first case you need to supply the content-type with the data,
usually using one of the `HttpEntity.apply` methods [2]:
HttpEntity(MediaTypes.`text/plain`, "test")
In the second case you can still just pass an entity to `complete`:
complete(HttpEntity(MediaTypes.`text/plain`, "test"))
or you make use of the marshalling infrastructure which uses type-classes
to convert a value of your domain model to a acceptable entity. So, using a
marshaller you can also be sure that content-types and charsets are
properly negotiated with the client.
E.g.
complete("test")
will use the predefined `StringMarshaller` [3] which will answer requests
that accept a `text/plain` response (rejecting others) and apply a charset
that the client understands.
HTH
Johannes
[1]
http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0-RC3/scala/http/common/http-model.html#HTTP_Headers
[2]
http://doc.akka.io/api/akka-stream-and-http-experimental/1.0-RC3/#akka.http.scaladsl.model.HttpEntity$
[3]
https://github.com/akka/akka/blob/release-2.3-dev/akka-http/src/main/scala/akka/http/scaladsl/marshalling/PredefinedToEntityMarshallers.scala#L50
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