title: Does AzureReader2 pull the image from the cdn if a query string is attached?
body: <p>I think I need some explanation on this.  On this page:<a href="http://stage.bullydog.com/Products/unfiltered-product/bd/BDGTPD/bully-dog-gt-platinum-diesel" rel="nofollow noreferrer">http://stage.bullydog.com/Products/unfiltered-product/bd/BDGTPD/bully-dog-gt-platinum-diesel</a>, you will see the following images:</p>
  
  <p><a href="https://i.stack.imgur.com/jC0wt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jC0wt.png" alt="enter image description here"></a></p>
  
  <p>The 2 on the left don't have any query strings and are located at:</p>
  
  <p><a href="http://stage.bullydog.com/azure/bdgtpd/40420_1.png" rel="nofollow noreferrer">http://stage.bullydog.com/azure/bdgtpd/40420_1.png</a> and <a href="http://stage.bullydog.com/azure/bdgtpd/40420_4.png" rel="nofollow noreferrer">http://stage.bullydog.com/azure/bdgtpd/40420_4.png</a></p>
  
  <p>On the third image, I put a query string of ?w=500 and that is located at:</p>
  
  <p><a href="http://stage.bullydog.com/azure/bdgtpd/40420_5.png?w=500" rel="nofollow noreferrer">http://stage.bullydog.com/azure/bdgtpd/40420_5.png?w=500</a></p>
  
  <p>Her is a capture of the network traffic when I requested the page that contained the images:</p>
  
  <p><a href="https://i.stack.imgur.com/1k3In.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1k3In.png" alt="enter image description here"></a></p>
  
  <p>Here is where I need some clarification and overall what is happening here:</p>
  
  <ol>
  <li>If the image url contains a query string, does it pull the image from the azure cdn?  I noticed the image <code>40420_5.png?w=500</code> has a <code>Request Url</code> of <code>http://stage.bullydog.com/azure/bdgtpd/40420_5.png?w=500</code>, so it doesn't appear to be pulling from the azure cdn.  Why is this?</li>
  <li>For the other images, take <code>40420_4</code> for example, I noticed it issues a 302 first and then another request.  Why does it do this?</li>
  <li>If using srcset, is ImageResizer beneficial here, for example, is it better to set the different sources with the query string attached, such as <code>40420_5.png?w=250, 40420_5.png?w=500, etc</code> or is it better to just create the different image sizes such as <code>40420_5_w250.png, 40420_5_w500.png</code>? or maybe Slimmage with SlimResponse would be the way to go?</li>
  </ol>