title: Owin: host name (or ip) and port
body: <p>I have a classic owin startup class like this: </p>
  
  <pre><code>public class Startup
  {
      public void Configuration(IAppBuilder app)
      {
      }
   }
  </code></pre>
  
  <p>Is there any way to get the host name (or ip) and port inside the 'Configuration' function ?</p>
  
  <p>Thanks.</p>