This setup simulates a BlockBuster running on duetto-blockbuster-test.taquiri.de using an OpenSpace running on demo.micerate.com inside an iframe. The websites are on different servers/ips. Communication is done using browsers core functionality postMessage().
The red bar displayes the messages “Blockbuster” recieved from “OpenSpace”. Messages in the other direction should work as well but have not been tested yet. A message can be any common kind of data including objects and JSON.
This does not work completely in an anonymous window as the iframes cookies get lost there. Yet using postMessage() is still working.