How to detect if WebGL is on Facebook Canvas

Question

Im currently facing an issue where I am using the Facebook plugin v.7.1.0 for Unity. Im distributing through WebGL, but my app needs to be running both on Facebook, but also outside Facebook. When using FB.Init I get a successful callback, which is what I used to use for testing whether on Facebook canvas or not when deploying for WebPlayer.

So my question is, how do I detect whether the WebGL player is on the facebook canvas or not?

Answer 1

In Unity's WebGL, you can communicate with javascript. link

So, I call a javascript function to check current url by

C#

Application.ExternalCall("GetCurrentUrlType");

JS

function GetCurrentUrlType(){
  var url = document.URL;
  if (url.indexOf("apps.facebook.com") > -1)
    SendMessage("GameObject", "CheckURL", "facebook");
}

Hope this help!!!