title: background-image:url not working for amazon s3 image
body: <p><strong>What i want</strong></p>
  
  <p>I am trying to set background image for class , the image stored on amazon s3, i am accessing the image through paperclip object on rails</p>
  
  <p><strong>css class</strong></p>
  
  <pre><code>.user-area{
      background-image:url('&lt;%=@user.background_image.expiring_url %&gt;');
      background-repeat:no-repeat;
      width:1025px !important;
      margin-top:100px !important;
  }
  </code></pre>
  
  <p><strong>Out put on the browser</strong></p>
  
  <pre><code>.user-area{
      background-image:url('https://xyz-customers.s3.amazonaws.com/photos/7/superbackground.jpg?AWSAccessKeyId=xxxxxxxxxxxxx&amp;amp;Expires=1402511741&amp;amp;Signature=xxxxxxxxxxxxxxxx');
      background-repeat:no-repeat;
      width:1025px !important;
      margin-top:100px !important;
  }
  </code></pre>
  
  <p><strong>The problem</strong></p>
  
  <p>The image is not visible on the browser , but when i visit the amazon s3 url,(that is generated on the css class) i can able to view the image.</p>
  
  <p>and the browser also throws an 403 error for this file, <code>is a Failed to load resource: the server responded with a status of 403 (Forbidden)</code></p>