Facebook Page Tab App Blank With Rails

Problem

You see a blank page in Rails Facebook Page Tab application.

Solution

Allow iframe in Rails, by overriding the default Headers

class FacebookClubsController < ApplicationController
 layout "facebook_canvas"

 after_filter :allow_iframe

 def index
 end

 private

 def allow_iframe
 response.headers["X-Frame-Options"] = "GOFORIT"
 end
end

Gist:

https://gist.github.com/shavit/5171168

http://conpanna.net