Scala 如何从Akka HTTP请求中读取cookie值

我是Akka HTTP新手，我想知道如何从Akka HTTP请求中提取cookie。如果可能，是否有人可以发布一个示例，说明如何使用Scala执行此操作？

作为说明，您可以使用

cookie

指令从请求中提取cookie：

还有一项指令：

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感谢您提醒我，在我能够清楚地理解文档之前，我需要更加熟悉这个框架。实际上，它确实帮助我花一些时间研究文档中提供的其他示例。

val route =
  cookie("userName") { nameCookie =>
    complete(s"The logged in user is '${nameCookie.value}'")
  }

// tests:
Get("/") ~> Cookie("userName" -> "paul") ~> route ~> check {
  responseAs[String] shouldEqual "The logged in user is 'paul'"
}
// missing cookie
Get("/") ~> route ~> check {
  rejection shouldEqual MissingCookieRejection("userName")
}
Get("/") ~> Route.seal(route) ~> check {
  responseAs[String] shouldEqual "Request is missing required cookie 'userName'"
}

val route =
  optionalCookie("userName") {
    case Some(nameCookie) => complete(s"The logged in user is '${nameCookie.value}'")
    case None             => complete("No user logged in")
  }

// tests:
Get("/") ~> Cookie("userName" -> "paul") ~> route ~> check {
  responseAs[String] shouldEqual "The logged in user is 'paul'"
}
Get("/") ~> route ~> check {
  responseAs[String] shouldEqual "No user logged in"
}