title: Google OAuth 2.0 redirect_uri with several parameters
body: <p>How to add a parameters to the Google OAuth 2.0 <code>redirect_uri</code>?</p>
  <p>Just like this:</p>
  <blockquote>
  <p><code>redirect_uri=http://www.example.com/redirect.html?a=b</code></p>
  </blockquote>
  <p>The <code>b</code> of <code>a=b</code> is random.</p>
  <p>Anyone can help ?</p>