problem with skipping filter?

From:

"vj" <vjmaker78@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

27 Oct 2006 06:35:14 -0700

Message-ID:

<1161956113.992175.260170@i42g2000cwa.googlegroups.com>

I am trying to skip going through filter in my code if certain
condition met(i.e. rss.xml or rss.rdf)
But after doing all kind of R&d i am unable to make it.
My tried code is mentioned below.
any modifications suggested.

if(totaluri.endsWith("rss.rdf") && auth_string==null){
in this line i am trying to make this but it always gpes to
if(auth_string==null){
where authecation is must.
My ultimate goal is to read rss.xml/rdf in rs reader which is present
outside the program.
where i can't pass username and password stuff.

public void doFilter(ServletRequest request, ServletResponse
servletresponse, FilterChain chain)
    throws IOException, ServletException {
        // Create wrappers for the request and response objects.
        // Using these, you can extend the capabilities of the
        // request and response, for example, allow setting parameters
        // on the request before sending the request to the rest of the
filter chain,
        // or keep track of the cookies that are set on the response.
        //
        // Caveat: some servers do not handle wrappers very well for
forward or
        // include requests.

        HttpServletRequest hsr=(HttpServletRequest)request;
        HttpServletResponse
response=(HttpServletResponse)servletresponse;

        HttpSession hs=hsr.getSession();

        String auth_string=(String)hs.getAttribute("Authentication");

        String contextpath=hsr.getContextPath();
            String querystring=hsr.getQueryString();

            String host_address=getHostAddress(hsr);
            String totaluri=hsr.getRequestURI()+querystring;
            totaluri=totaluri.replaceAll("//","/");

     if(totaluri.endsWith("rss.rdf") && auth_string==null){
            hs.setAttribute("Authentication", "Validating");
            hs.setAttribute("uri",totaluri);

            response.setContentType("text/html");
            response.setHeader("Cache-Control","no-cache");//For HTTP
1.1
            response.setHeader("Pragma","no-cache"); //For HTTP 1.0
            response.setDateHeader ("Expires", -1);

            PrintWriter pw=response.getWriter();
            pw.println("<html>");
            pw.println("<head><META HTTP-EQUIV='PRAGMA'
CONTENT=''NO-CACHE'></head>");
            pw.println("<body onload=document.g.submit();>");
            pw.println("<form name=g>");
            pw.println("<input type=hidden name=glink
value='http://"+host_address+hsr.getContextPath()+"/LoginServlet' >");
            pw.println("</form>");
            pw.println("<script>");
            pw.println("document.g.glink.value = document.g.glink.value
;");
            pw.println("</script>");
            pw.println("</body>");
            pw.println("</html>");
            pw.close();
            return;
       }

            else if(auth_string==null) {
            hs.setAttribute("Authentication", "Validating");
            String context_path=hsr.getContextPath();
            String query_string=hsr.getQueryString();
            if(query_string == null)
                query_string="";
            else
                query_string="?"+query_string;

            String hostaddress=getHostAddress(hsr);
            String total_uri=hsr.getRequestURI()+query_string;
            total_uri=total_uri.replaceAll("//","/");

            hs.setAttribute("uri",total_uri);

            response.setContentType("text/html");
            response.setHeader("Cache-Control","no-cache");//For HTTP
1.1
            response.setHeader("Pragma","no-cache"); //For HTTP 1.0
            response.setDateHeader ("Expires", -1);

            PrintWriter pw=response.getWriter();
            pw.println("<html>");
            pw.println("<head><META HTTP-EQUIV='PRAGMA'
CONTENT=''NO-CACHE'></head>");
            pw.println("<body onload=document.g.submit();>");
            pw.println("<form name=g
action='http://canetportalauth.ca.com/ntlmcp.asp' method=post>");
            pw.println("<input type=hidden name=glink
value='http://"+hostaddress+hsr.getContextPath()+"/LoginServlet' >");
            pw.println("</form>");
            pw.println("<script>");
            pw.println("document.g.glink.value = document.g.glink.value
;");
            pw.println("</script>");
            pw.println("</body>");
            pw.println("</html>");
            pw.close();
            return;

        } else if(auth_string.equals("Validated")) {
            String username=(String)hs.getAttribute("USERNAME");
            RequestWrapper wrappedRequest = new
RequestWrapper((HttpServletRequest)request, username);
            chain.doFilter(wrappedRequest, response);
        } else if(auth_string.equals("Validating") &&
hsr.getRequestURI().replaceAll("//","/").equals(new
String(hsr.getContextPath()+"/LoginServlet").replaceAll("//", "/")))
        {
            chain.doFilter(request,response);
        } else {
            response.setContentType("text/html");
            PrintWriter pw=response.getWriter();
            pw.println("</html>");
            pw.println("<body>");
            pw.println("Authentication failed.. Please try again. If it
does not work, please close your browser and try again");
            pw.println("</body>");
            pw.println("</html>");
            pw.close();
            return;
        }
    }

thanks
vijendra