How to automatically capture images from URLs? My site is a bookmarking site where people share URLs.

First, if the page being submitted has Facebook open graph image information, Drupal should transfer that image to local files and display it (similar to sharing links on Facebook).

Otherwise, display a thumbnail preview of the page.

Thanks for help in advance.
Check out Opengraph filter module


  When you post a link on facebook, you get a little summary of that
  site under your comment or post (with or without thumbnail). This
  works with OpenGraph metatags. Basicly Facebook scrapes the content of
  the url and makes a nice little summary.