XML page cannot be displayed - Servlet error

Question

Hi,
I am trying to extract XML data from a source using a servlet.But i am getting this error when i run my servlet in IE :
The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later.
The download of the specified resource has failed. Error processing resource 'http://serverA.h.c.com:9300/p2pd/cog...
</dataset>
Can someone please guide me why i am getting this error? Here is the servlet code that i am using :
package com.cognos.demo;
import javax.servlet.http.*;
import java.io.*;
import com.cognos.developer.schemas.bibus._3.*;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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public class XMLGenerator extends  HttpServlet
     //Logging information goes here
      public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException
          response.setContentType ("text/html;charset=utf-8");
          response.setCharacterEncoding("utf-8");
          String xml = null;
          RunReport reportRunner= new RunReport();
          CRNConnect connect=new CRNConnect();
          String url="http://serverA.h.c.com:9300/p2pd/servlet/dispatch";
          String nameSpace="ADS_NS";
          String uid="cognos";
          String pwd="abcd45";
          Logon sessionLogon = null;
          int REP_XML=1;
          try {
          connect.connectToCognosServer(url);
          catch (Exception e)
               e.printStackTrace();
               //System.out.println("Not able to connect to Cognos Server");
               response.getWriter().print("Cannot connect to Cognos server");
          sessionLogon=new Logon();
          String logonOutputSource = "";
          String reportOutput=null;
          //Till the user gets logged in or he exits
          while (!Logon.loggedIn(connect)) {
               try
                    logonOutputSource = sessionLogon.quickLogon(connect,uid,pwd);
                    //System.out.println("Connected to the Cognos server..");
                    System.out.println(logonOutputSource);
               catch(Exception ex)
                    System.out.println("Error : Unknown host ");
               if (!Logon.loggedIn(connect)) {
                    response.getWriter().print("Unable to logon");
                    System.exit(0);
          //Report Processing here
          //String reportName=args[0].trim();
          //locate the selected report
          BaseClassWrapper selectedReport=null;
          selectedReport=reportRunner.findReport(connect);
          reportOutput=reportRunner.runReport(connect,selectedReport,REP_XML,false);
          xml=reportOutput;
          //System.out.println("Main:" + reportOutput);
          System.exit(0);
          try
               response.getWriter().print(xml);
               response.getWriter().flush();
          catch (IOException e)
               response.getWriter().print("Unable to publish xml");
               System.out.println(e);
}I am using some classes to extract xml data from a data source and retrieve that as a string and then i am displaying it using response object.
Any help in this regard would be highly appreciated.
Thanks,
Shishir.
Edited by: Invinc4u on Dec 15, 2008 6:56 AM

Answer 1

i'm pretty sure that error comes up when your browser (ie, specifically, i believe) can't render the xml data it's received. i'm also pretty sure, as the full message implies, it's because it doesn't know what style sheet to use when you go to that page. in short, it's a browser config issue. one way to bypass it (to at least prove that it's a browser issue) would be to create a link to your page, right click the link, and do a "Save Target As...". the resulting file will be your valid XML one. fwiw, i've had better luck controlling the manner in which my xml data is received when i use mozilla or netscape (but i'd imagine there's just some setting you'd toggle in IE to avoid your issue).
hope this helps,
raj