title: Who embeds my Widgets? (Or how to get the URL of the parent frame)
body: <p>Is there I way to get the URL of the parent frame from within an iframe? I know you can't do this using JavaScript (or is there?). Is there a way to do it server-side?</p>
  
  <p>Or is the only solution that we change our widget embed codes so that they include some JavaScript that communicates the <code>window.location</code> to the iframe (<code>postMessage</code>/changing the location hash of the iframe)?</p>