title: Facebook open graph url redirect issue
body: <p>I am trying use open graph API to publish an action. URL that I provide as part of meta data property og:url can be accessed by authenticated users only. Facebook is trying to scrape the URL and is ending up with a sign_in page due to a 302 redirect.</p>
  
  <p>Do I have to construct a page just for facebook scraping with meta tags in it? Isn't this url linked to the content published on facebook?</p>