Facebook Javascript Canvas Login Redirect

Question

I am building a facebook canvas application and want users, when they visit "apps.facebook.com/myApp", to be presented with the appropriate login dialogue immediately instead of showing my canvas page without having been logged in. With all the different login flows, I am confused!

Using javascript, how do I do this? Do I set the default canvas page to be a page with a script with a redirect url in it?

Answer 1

You should not immediately present them with the login dialog, it is best practice to show some intro screen with information about your app first. Else there is only a small authorization information and no use will really know what the app is about. Then let the user click on a "Login/Use/Start/..." button to present the authorization popup with the FB.login function of the JavaScript SDK:

https://developers.facebook.com/docs/reference/javascript/FB.login/

If you really want to require user authorization right at the beginning, user the PHP SDK:

https://github.com/facebook/facebook-php-sdk

See " $facebook->getLoginUrl() " - just redirect to the resulting URL if the user is not logged in.