title: Showing a progress bar when downloading a file from the server
body: <p>I need to show a progress bar to the user who requests a file to download. I am using J2EE application to generate the file. User will submit the form data to get the file. The server takes all the submitted data manipulates, generates and sends a PDF file back to Client. </p>
  
  <p>So I want to show a progress bar to the user till the file comes to the Client side. 
  Is there any way to do this ? </p>