scala - 如何在喷雾中从响应“set-cookie”标头转换为请求“cookie”标头？

Question

我正在尝试使用spray-client和spray-httpx，但我无法弄清楚如何将“set-cookie”标头转换HttpResponse为我想在HttpRequest

val responseSetCookieHeaders = response.headers filter { _.name == "Set-Cookie" }
...
val requestCookieHeader:HttpHeader = ???
...
addHeader(requestCookieHeader) ~> sendReceive ~> { response => ??? }

我确实看到spray.http.HttpHeaders.Cookie了，但我看不到从实例转换HttpHeader为HttpCookie...

Answer 1

HttpHeaders.Cookie是一个带有unapply方法的案例类。因此，您可以使用一个简单的函数从响应中提取它：

def getCookie(name: String): HttpHeader => Option[HttpCookie] = {
  case Cookie(cookies) => cookies.find(_.name == name)
}

这是一个更普遍的情况，但我认为解决方案很明确。

我会通过以下方式做到这一点：

// some example response with cookie
val httpResponse = HttpResponse(headers = List(`Set-Cookie`(HttpCookie("a", "b"))))

// extracting HttpCookie
val httpCookie: List[HttpCookie] = httpResponse.headers.collect { case `Set-Cookie`(hc) => hc }

// adding to client pipeline
val pipeline = addHeader(Cookie(httpCookie)) ~> sendReceive