Java WebStart 1.6.0 always cache jnlp files

[Vladimir Bezugliy]

We generate jnlp files by our servlet.
As far as I can see Java WebStart 1.6.0 move jnlp to cache and if I try to call the same jnlp then Java WebStart 1.6.0 get this jnlp file from cache not from my servlet.

I tried to set next headers in order to force not to cache jnlp files:

   public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException
   {
...
      long lastModified = System.currentTimeMillis();
 
      // Set to expire far in the past.
      response.addHeader("Expires", "Sat, 6 May 1995 12:00:00 GMT");
 
      // Set standard HTTP/1.1 no-cache headers.
      response.addHeader("Cache-Control", "no-store, no-cache, must-revalidate");
 
      // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
      response.addHeader("Cache-Control", "post-check=0, pre-check=0");
 
      // Set standard HTTP/1.0 no-cache header.
      response.addHeader("Pragma", "no-cache");
...
}

But it does not help us.

We do not have such problems with Java WebStart 1.4 and Java WebStart 1.5.

What header should I set in order to get generated jnlp file but not cached?

[dinesh rackson]

Somebody please answer to the above question...

i am facing the same issue....

[manasvini jayram]

Is there a solution for this? We too do not want the jnlp to be cached on the local machine

[dinesh rackson]

The solution:

<%	String jspPath = application.getRealPath(request.getServletPath());
	java.io.File jspFile = new java.io.File(jspPath);
	long lastModified = jspFile.lastModified();
	((HttpServletResponse)response).setDateHeader("Last-Modified", lastModified);    

%>  

Including the above code in the jnlp file will always get the latest jnlp file from the server.

[Paul Clapham]

Or if you're using a servlet to send the JNLP file to the response, you override its getLastModified() method to return that information.