How to refresh expired google sign-in logins?

google-signin google-plus-signin google-identity
stickfigure picture stickfigure · Aug 22, 2015 · Viewed 10k times · Source

I'm using Google Sign-In. A user comes to my site and logs in with gapi.auth2.getAuthInstance().signIn(), or they are already logged in and when the page loads (or reloads) we fetch the status. At this point I have an identity token good for an hour that I can validate on the server.

When a user leaves the browser sitting (say, overnight), this token expires. gapi.auth2.getAuthInstance().isSignedIn.get() returns true, but the token does not validate.

How can I log in a user and keep them logged in while their session is active (ie, browser hasn't been closed)? Or refresh the token? Anything more graceful than reloading the page...

Edit: The refresh token is not a correct answer; I don't want offline access (and don't want to ask for the permission). Google obviously thinks the user is still signed into my application; the user can reload the page and get a new token without providing credentials again. Surely there is some mechanism more graceful than a hidden iframe to get an updated token?

Answer

Jacek Kopecký picture Jacek Kopecký · Jun 18, 2016

If the token is expired, you can call gapi.auth2.getAuthInstance().currentUser.get().reloadAuthResponse(). It returns a Promise.

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