Js_of_ocaml-获取cookie时出错

Question

我是XmlHttpRequest，为了发出http请求，我想获取cookie。获取cookie的代码：

let http_post url =
  XmlHttpRequest.perform_raw_url
    ~post_args:[("login", `String (Js.string "foo"));
                ("password", `String (Js.string "bar"))]
    url >>= fun r -> 
  let code = r.XmlHttpRequest.code in
  let msg = r.XmlHttpRequest.content in
  let cookie = match r.XmlHttpRequest.headers "Set-Cookie" with
  | None -> "Empty Cookie"
  | Some s -> s in 
  if code = 0 || code = 200
  then Lwt.return (msg,cookie)
let make_test_request id =
  let button = get_element_by_id id in
  button##onclick <- (Html.handler (fun _ ->
      http_post "www.website.com" >>=
      (fun (msg,cookie) ->
         Printf.printf "cookie = %sn" cookie;
         Html.document##cookie <- Js.string cookie;
         Printf.printf "s = %sn" msg;
         Lwt.return());
      Js._true))

Cookie应该在标头中，我收到了以下错误：拒绝获取不安全的标头"设置Cookie"

是我把cookie弄错了，还是我的网络浏览器有问题（我使用的是铬）？

Answer 1

http://www.w3.org/TR/XMLHttpRequest/#the-getresponseheader（）-方法

客户。getResponseHeader（header）返回字段名称与标头匹配的响应，除非字段name是Set Cookie或Set-Cookie2。

为什么cookie和设置cookie头可以'；是否在使用setRequestHeader进行xmlhttprequest时设置？