title: How to supply current url in Facebook share link
body: <p>I'm trying to make a Share on Facebook link with the following code:</p>
  
  <pre><code>&lt;%= link_to 'Share on Facebook', 'https://www.facebook.com/dialog/share?
    app_id=xxxxxxxxxxxxxx&amp;href=#{request.original_url}&amp;redirect_uri=#{request.original_url}' %&gt;
  </code></pre>
  
  <p>Needless to say the href and uri links don't get supplied. How can I insert the rails term <code>request.original_url</code> into this link?</p>
  
  <p>Is it possible?</p>