title: How to hide the physical path of the images
body: <p>In my application i display the image of user by giving the physical path of the directories like <a href="http://www.example.com/user_images/abcdefghijk.jpg" rel="nofollow">http://www.example.com/user_images/abcdefghijk.jpg</a> </p>
  
  <p>But i dont want to expose this physical path to the external users to access the direct files. 
  I want to implement the image retrieval as per the gravtar type image display. How we can do that?</p>