title: Access Token expire time with offline_access permission
body: <p>Facebook Permissions page states the following about offline_access:</p>
  
  <blockquote>
    <p>Enables your application to perform authorized requests on behalf of
    the user at any time. By default, most access tokens expire after a
    short time period to ensure applications only make requests on behalf
    of the user when the are actively using the application. This
    permission makes the access token returned by our OAuth endpoint
    long-lived.</p>
  </blockquote>
  
  <p>Then I read this topic <a href="http://developers.facebook.com/docs/authentication/" rel="nofollow">http://developers.facebook.com/docs/authentication/</a></p>
  
  <p>Tried this:</p>
  
  <p><a href="https://graph.facebook.com/oauth/access_token" rel="nofollow">https://graph.facebook.com/oauth/access_token</a>?</p>
  
  <pre><code> client_id=YOUR_APP_ID&amp;redirect_uri=YOUR_URL&amp;
   client_secret=YOUR_APP_SECRET&amp;code=THE_CODE_FROM_ABOVE
  </code></pre>
  
  <p>This url without offline_access permission responding like this:</p>
  
  <pre><code>access_token=.....&amp;expires=5462
  </code></pre>
  
  <p>But with offline_access permission responding just access_token. I dont get this, facebook says its long-lived but how long lived?</p>
  
  <p>How can I learn when expires access token with offline_access permission?</p>