Golang - 无法使cookie过期

我目前正在使用Go App Engine SDK,我正在尝试设置/过期Cookie.

设置Cookie没有问题,但是无法在浏览器中使其过期.

该应用程序基于一个negroni实例:

func init() {

    app := negroni.New()
    app.UseHandler(Router())
    http.Handle("/", app)

}

路由器是一个mux实例:

func Router() *mux.Router {

    r := mux.NewRouter()
    subRouter := r.PathPrefix(PATH_PREFIX).Subrouter()

    subRouter.HandleFunc("/sign", LoginHandler)
    subRouter.HandleFunc("/userinfo", UserInfo)
    subRouter.HandleFunc("/logout", Logout)

    return r
}

登录处理程序是基本的:

func LoginHandler(w http.ResponseWriter, r *http.Request) {

    ctx := appengine.NewContext(r)

    u := user.Current(ctx)

    if u == nil {

        url, err := user.LoginURL(ctx, r.URL.String())
        if err != nil {
            http.Error(w, err.Error(), http.StatusInternalServerError)
            return
        }
        w.Header().Set("Location", url)
        w.WriteHeader(http.StatusFound)
        return
    }

    //COOKIE_ID = "SomeString"
    cookie := &http.Cookie{Name: COOKIE_ID, Value: u.ID, Path: "/", MaxAge: 0}
    http.SetCookie(w, cookie)

    w.Header().Set("Location", "/")
    w.WriteHeader(http.StatusFound)
}

要使cookie过期:

func Logout(w http.ResponseWriter, r *http.Request) {

    ctx := appengine.NewContext(r)
    url, err := user.LogoutURL(ctx, "/")

    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    expiredCookie := &http.Cookie{Name: COOKIE_ID, MaxAge: -10, Expires: time.Now()}
    http.SetCookie(w, expiredCookie)

    w.Header().Set("Location", url)
    w.WriteHeader(http.StatusFound)
}

我尝试了一切:

获取旧cookie,更改MaxAge和Expires

创建一个具有相同名称的新cookie以覆盖

完整代码:https://gist.github.com/yageek/78e43c83b56467fc8338

在任何情况下,cookie仍然保留在导航器中.我做错了什么？

浏览器存储多个路径的cookie.在cookie标头上设置path属性以匹配用于创建cookie的路径属性.

将最大年龄设置为负值以清除cookie.如果等于零,则不在标题上设置最大年龄属性.

某些浏览器不了解最大年龄属性.为了这些浏览器的利益,将过期时间设置为过去的时间.

expiredCookie := &http.Cookie{Path: "/", Name: COOKIE_ID, MaxAge: -1, Expires: time.Now().Add(-100 * time.Hour)}