title: Parse url hash fragment in express application
body: <p>I am writing a express application, and I have to authenticate the user using oauth 2.0 flow. I have successfully redirected the user to the oauth provider and the provider send the access token in the oauth callback. Something like</p>
  
  <pre><code>http://localhost:4000/oauth/callback#access_token=&lt;token&gt;
  </code></pre>
  
  <p>Now I have a express route handler like</p>
  
  <pre><code>app.get('/oauth/callback', function(req, res, next) {
  });
  </code></pre>
  
  <p>I know that hash fragment is not passed to server, but this is a oauth callback.</p>
  
  <p>How can I get the url hash fragment in the route handler ?</p>