How to detect if user shares Application Url
I have an application on Facebook. 

I would like to know how can I manage to detect if the user shares the URL of the application (the user copy-pastes the link of the app) on his status ?

I need to do that because people that sees this application must be redirected to a fan page, before seeing the application.

Thanks!
How to detect if user shares Application Url
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I have an application on Facebook. 

I would like to know how can I manage to detect if the user shares the URL of the application (the user copy-pastes the link of the app) on his status ?

I need to do that because people that sees this application must be redirected to a fan page, before seeing the application.

Thanks!