如何指定喷涂Content-Type响应头？

Question

我知道喷雾为我做了这个,但我仍然希望用我的标题覆盖它,我怎样才能覆盖响应中的标题？

我的回答如下:

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

Answer 1

如果你仍然想使用喷雾罐,那么你有两个选择,基于HttpResponse是一个案例类.第一种是传递具有显式内容类型的List:

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,第二种方法是使用方法withHeaders方法:

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,就像jrudolph说的那样,使用喷涂路由要好得多,在这种情况下它看起来会更好:

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

但喷雾使它更容易,并为您处理所有(联合国)编组:

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

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

在这种情况下,响应类型将由application/json喷雾本身设置.

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)
}