title: Directly ask for permission in canvas app
body: <p>Is there some new method for problem like this <a href="https://stackoverflow.com/questions/4382017/facebook-how-to-go-directly-to-the-request-permission-dialog-with-an-iframe-ap">Facebook - how to go directly to the request permission dialog with an iframe app?</a> 
  because answer from question in this link, isnt working. </p>