Hi all, I had posted this problem on the Struts Mailing list but never got any response. So I thought I might forward it on to this list. Please let me know if the problem sounds familiar.
Thanks, Jitesh -----Original Message----- From: Jitesh Vidhani [mailto:[EMAIL PROTECTED]] Sent: Friday, May 31, 2002 11:49 AM To: [EMAIL PROTECTED] Subject: Problem writing a Filter with Struts Hi all, I am trying to write a Filter around my struts layer. Basically what I want to achieve is that when the User tries to go to a particular URL, I make him go through the Filter. The filter calls chain.doFilter() and I then I check to see if the ActionBean has set up a particular attribute in the request. If it has been set then the Filter modifies the response and outputs a different HTML onto the client. Heres the code snippet from my Filter: ServletOutputStream out = response.getOutputStream(); ResponseWrapper wrapper = new ResponseWrapper((HttpServletResponse)response); chain.doFilter(request, wrapper); if(request.getAttribute("Modify")!=null) { CharArrayWriter caw = new CharArrayWriter(); caw.write("<html><body>THIS IS THE MODIFIED PAGE</body></html>"); response.setContentLength(caw.toString().length()); out.print(caw.toString()); } else { byte[] bytes = wrapper.toByteArray(); System.out.println("About to add: " + String.valueOf(bytes.length) + " bytes to the stream: " + new String(bytes)); out.write(bytes); response.setContentLength(bytes.length); } response.setContentType("text/html"); out.flush(); out.close(); I have a wrapper wherein I extend the HttpServletResponseWrapper and use a ByteArrayOutoutStream and I have overridden the getWriter() and the getOutputStream() methods of the HttpServletResponseWrapper. Now when I try to use this URL in the client browser then I somehow see a Blank page irrespective of whether the request attribute has been set or not. I also tried to print the Bytes from the wrapper that I am writing out to the response's ServletOutputStream and it seems to be right. I have written a small test servlet and the Filter works just fine with that Servlet. So there is something perculiar about the Struts ActionServlet that doesnt allow me to do this. I am not able to figure out where I am going wrong. Any help would be appreciated. Thanks, Jitesh _______________________________________________ MVC-Programmers mailing list [EMAIL PROTECTED] http://www.basebeans.com:8081/mailman/listinfo/mvc-programmers
