Thanks Thomas for clarification of messaging api. I believed that it is
working only on same domain and that it is build just to standardize
communication.

Best,
Milan

On Wed, Feb 27, 2013 at 3:24 PM, Thomas Broyer <[email protected]> wrote:

>
>
> 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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