Rails 4 / Koala：如何刷新长时间访问令牌？

Question

Using Rails 4 and Koala gem version 2. I have my personal Facebook page (not profile). When I am publishing a new post in my website I want to automatically publish it on my facebook page as well. I am using Koala gem but I have some problem with access tokens.

Visiting https://developers.facebook.com/tools/explorer/ I get a short-live token. This token expires after only 2 hours.

My goal is to obtain a long-live token. I have created a new Facebook app and I have obtained a client-id and client-secret .

Visiting this https://graph.facebook.com/oauth/access_token?client_id=MY-CLIENT-ID&client_secret=MY-CLIENT-SECRET&grant_type=fb_exchange_token&fb_exchange_token=MY-SHORT-LIVE-TOKEN I get long-live token.

Now I can use my long-live token to publish on my page:

user = Koala::Facebook::API.new long_live_access_token
page_access_token = user.get_connections('me', 'accounts').first['access_token']
page = Koala::Facebook::API.new page_access_token
page.put_connections("me", "feed", message: "I am posting on my page!ok!")

It seems to work, but my problems is that the long-live token expires in 60 days so I need to refresh it. I have found no solution to refresh a long-live token. It is clear that I can't repeat the entire procedure every 60 days!

Ideas?

Answer 1

From the official docs:

These tokens ( long-lived ) will be refreshed once per day when the person using your app makes a request to Facebook's servers. If no requests are made, the token will expire after about 60 days and the person will have to go through the login flow again to get a new token.

The token that never expires is a page token.