如何指定喷雾Content-Type响应标头？

问题描述

我知道Spray可以为我做到这一点，但是我仍然想用标题覆盖它，如何在响应中覆盖标题？

I understand that spray does that for me, but I still want to override it with my header, how can I override the header in the response?

我的响应看起来像这样：

My response looks like this:

case HttpRequest(GET, Uri.Path("/something"), _, _, _) =>
  sender ! HttpResponse(entity = """{ "key": "value" }""" // here i want to specify also response header i would like to explicitly set it and not get it implicitly

推荐答案

如果您仍然想使用Spray can，那么您有两个选择，基于HttpResponse是第一个是传递具有显式内容类型的List：

If you still want to use spray can, then you have two options, based on that HttpResponse is a case class. The first is to pass a List with an explicit content type:

import spray.http.HttpHeaders._
import spray.http.ContentTypes._

def receive = {
    case HttpRequest(GET, Uri.Path("/something"), _, _, _) =>
      sender ! HttpResponse(entity = """{ "key": "value" }""", headers = List(`Content-Type`(`application/json`)))
  }

或者，第二种方法是使用 withHeaders 方法：

Or, the second way, is to use a method withHeaders method:

def receive = {
    case HttpRequest(GET, Uri.Path("/something"), _, _, _) =>
      val response: HttpResponse = HttpResponse(entity = """{ "key": "value" }""")
      sender ! response.withHeaders(List(`Content-Type`(`application/json`)))
  }

但是，仍然像所说，使用喷涂工艺要好得多，在这种情况下看起来会更好：

But still, like jrudolph said, it's much better to use spray routing, in this case it would look better:

def receive = runRoute {
    path("/something") {
      get {
        respondWithHeader(`Content-Type`(`application/json`)) {
          complete("""{ "key": "value" }""")
        }
      }
    }
  }

但是喷雾使操作更轻松，并能处理所有（un ）为您编组：

But spray makes it even easier and handles all (un)marshalling for you:

import spray.httpx.SprayJsonSupport._
import spray.json.DefaultJsonProtocol._

def receive = runRoute {
  (path("/something") & get) {
    complete(Map("key" -> "value"))
  }
}

在这种情况下，响应类型将设置为 application / json

In this case reponse type will be set to application/json by the spray itself.

我的评论的完整示例：

class FullProfileServiceStack
  extends HttpServiceActor
     with ProfileServiceStack
     with ... {
  def actorRefFactory = context
  def receive = runRoute(serviceRoutes)
}

object Launcher extends App {
  import Settings.service._
  implicit val system = ActorSystem("Profile-Service")
  import system.log

  log.info("Starting service actor")
  val handler = system.actorOf(Props[FullProfileServiceStack], "ProfileActor")

  log.info("Starting Http connection")
  IO(Http) ! Http.Bind(handler, interface = host, port = port)
}

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