How To Enable IFrame Support on Heroku with Ruby on Rails and Sinatra
This actually has more to do with Rails and/or Sinatra than it does with Heroku. You have to enable IFrame support in your headers explicitly. With Rails you can add this to your config/application.rb file
config.action_dispatch.default_headers = {
'X-Frame-Options' => 'ALLOWALL'
}
In Sinatra you add this declaration in the configure block
configure do
set :protection, except: [:frame_options]
end
That saved my time. Thanks a lot!