title: Detect screen size and pixel density on the server-side?
body: <p>I've been doing some research and I think I know the answer already, but I'm wondering if there's any means by which you can get a device's screen size and pixel density without the use of javascript or relying on CSS3 media queries.</p>
  
  <p>Essentially, I'm looking into what it would take to get the screen resolution and pixel density so that the server could decide which image to server in a URI request.</p>
  
  <p>So far I've not found anything that says this is even possible but I thought hey, why not ask?</p>