如何从响应'set-cookie'标题转换为在spray中请求'cookie'标题？

Question

我试图使用spray-client和spray-httpx，而我却无法弄清楚如何转换＆＃39; set-cookie＆＃39;标题从HttpResponse到“Cookie”＆＃39;我想在HttpRequest

上设置标题

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

我看到spray.http.HttpHeaders.Cookie，但我认为无法将HttpHeader的实例转换为HttpCookie ...

Answer 1

HttpHeaders.Cookie是一个带有unapply方法的案例类。所以你可以通过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。

我会用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