title: returning Html in a controller symfony2
body: <p>I'm using Symfony2 and i need to use Curl to return Html from a Webservice, i tried to simply <code>return $html</code> , but Symfony2 fired : <br></p>
  
  <blockquote>
    <p>Uncaught PHP Exception InvalidArgumentException: "Unable to find template ""</p>
  </blockquote>
  
  <p>any help will be appreciated . Thank you </p>