some.scala

class SomeClass {
  private def get(url: String): Future[Option[String]] =
    for {
      serviceResponse <- sendGetRequest(url)
    } yield maybeBody(url, serviceResponse)

  private def maybeBody(url: String, response: HttpResponse[String]): String =
    if (response.is2xx) Some(response.body)
    else None

  private def sendGetRequest(url: String): Future[HttpResponse[String]] =
    Future {
      Http(url).headers(criticalHeaders).asString
    }   

  private def criticalHeaders = Seq(
    "x-http-request-id" -> Context.getRequestContext.getRequestId,
    "x-http-caller-id"  -> Context.getRequestContext.getCallerId,
    "Accept" -> "application/json"
  )
}