Prevent an authorization dialog on 401

Webix JS
1

Hi,
I need to check whether the user is logged in and redirect it to the login page if not.
I added the following code in app.js :

function start_event(mode, url, params, xhr, headers, data, promise) {
    if (promise)
        promise.then(null,
                function (err) {
                    if (err.status === 401) {
                        window.location.href = "/login"
                    }
                }
        );
}

webix.attachEvent("onBeforeAjax", start_event);

It works, but if user isn’t authorized then main page and browser authorization dialog show for a moment before redirect to the login page.
How to prevent that?

2

You can try to use the code like next

webix.attachEvent("onAjaxError", function(xhr){
   if (xhr.status == 401)
       window.location.href = "/login";
});
3

Hi Maksim,

Using your code snippet I always get status == 0, and therefore I can not distinguish whether credentials are wrong or the server is down. If you could provide any further idea I will greatly appreciate that!

P.S. I do CORS request

4

status = 0 can occur if the request was blocked by client side ( so there was no real request at all ). Also please be sure that CORS is correctly configured, if the request was blocked by CORS rules, a browser will not give access to the response content, which includes access to response status as well.