drbxr86044
2015-12-01 16:25
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Golang-无法使Cookie过期

I'm currently playing with the Go App Engine SDK and I'm trying to set/expires Cookies.

There is no problem by setting a Cookie, but it is impossible to make it expiring in the browser.

The app is a based on a negroni instance:

func init() {

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

}

The router is a mux instance:

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
}

The login handler is basic:

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)
}

To expires the cookie:

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)
}

I tried everything:

  • Getting the old cookie, change MaxAge and Expires
  • Create a new cookie with the same Name to overwrite

Full code: https://gist.github.com/yageek/78e43c83b56467fc8338

In any case, the cookie still remains in the navigator. What do I do wrong ?

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