Cross Domain iFrame Communication

[Darren Bond <db...@globalcad.com>]

Dear All,
We’re using Java Shindig to render gadgets on an HTML page. We would like to communicate with the gadgets' hosted iFrames in order to re-color their backgrounds or make their backgrounds transparent.
A cross-domain technique needs to be used since most of these iFrames reside on other domains. Examples exist to perform this cross-domain communication e.g. http://www.shouldersofgiants.co.uk/Examples/CrossDomain/ParentPage.html
However, to implement such a solution, I believe we need to modify specific Shindig file(s). Since Shindig URLs are formed dynamically, we're unable to find the necessary page to modify. I am looking to the Shindig API for functions which will allow us to inject some style rules or pass a URL to a custom CSS file to achieve the above.
Can anyone help? Thanks.
Kind regards,
Darren

 

Re: Cross Domain iFrame Communication

[Ryan Baxter <rb...@apache.org>]

One way to do this would be to add a gadget rewriter which injects the
CSS into the gadget when it renders.  For example the default CSS that
Shindig injects is done in the RenderingGadgetRewriter [1].

[1] https://svn.apache.org/repos/asf/shindig/trunk/java/gadgets/src/main/java/org/apache/shindig/gadgets/render/RenderingGadgetRewriter.java

On Thu, Mar 20, 2014 at 10:38 AM, Darren Bond <db...@globalcad.com> wrote:
> Dear All,
> We're using Java Shindig to render gadgets on an HTML page. We would like to communicate with the gadgets' hosted iFrames in order to re-color their backgrounds or make their backgrounds transparent.
> A cross-domain technique needs to be used since most of these iFrames reside on other domains. Examples exist to perform this cross-domain communication e.g. http://www.shouldersofgiants.co.uk/Examples/CrossDomain/ParentPage.html
> However, to implement such a solution, I believe we need to modify specific Shindig file(s). Since Shindig URLs are formed dynamically, we're unable to find the necessary page to modify. I am looking to the Shindig API for functions which will allow us to inject some style rules or pass a URL to a custom CSS file to achieve the above.
> Can anyone help? Thanks.
> Kind regards,
> Darren
>
>