On Wednesday, February 27, 2013 3:07:48 PM UTC+1, Milan Cvejic wrote:
On the other hand, if you are loading iframe from the same domain, and have full control of iframe content you can use window.postMessage api for child - parent communication.
If it's from the same origin, you don't need postMessage. postMessage was specifically made for cross-origin communications.
See http://dev.w3.org/html5/postmsg/#web-messaging and http://www.whatwg.org/specs/web-apps/current-work/multipage/web-messaging.html#web-messaging for the spec, and http://html5demos.com/postmessage2 for a demo.
You will need to implement some JSNI methods in order to accomplish this in GWT.
or use Elemental.
I doubt it'll solve Laurent's use case though: he was talking about loading a third-party site, and never mentioned that site was "friendly" to the "calling GWT app" (he used Google as an example)
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