如何检测会话是否即将到期？

Question

I am using Gorilla Sessions for my Go website to manage user logins. Sometimes when a user leaves their computer for an hour or so the session expires but they have no idea about it. So the user goes on with their work but as soon as they try to save their progress, they get logged out. Is there any way I could detect if a user's session is about to expire, so I can automatically save their work or display a warning message?

Answer 1

Solution:

As soon as the client logs in they receive the session expiration date from the server. Then I set up a timer on client side, which after being idle for X (10 in my case) minutes, calls the API in every minute and checks if the session is still alive and if there is more time left than two minutes. If only two minutes left, I raise a warning message on the client side to inform the user that their session is about to expire (I also used this event to fire the auto save functions).