Another SAX Parser Question

Question

Hi All,
I get an xml file by making an http request. The name of the DTD comes as a relative path in the response xml file.
Questions
1. Is there a way to handle this
2. I read somewhere that i could avoid looking at the DTD alltogether,
can someone show me how with a sample code.
Kind regards

Answer 1

Nothing seems to help, Please help,
Im using jdk1.4 A full source codee would be great.
Thanks in advance.
This is the trace and the Code follows below:
C:\codes\parser>java -classpath xerces.jar;. ReaderConnector
Initiating Connection to System URL = http://a.b.c.com:5280/vega/
request?method=login&ui=ch16132-user&pwd=pass
Connected ..
Opening Stream for reading data
Got input stream java.io.BufferedInputStream@19821f
Got reader java.io.BufferedReader@addbf1
Read login file ...
Parsing ...
Start of Login document
\vega\xml\xrf.dtd (The system cannot find the path)
Parsed
********************************3
*****Code*****
import javax.xml.parsers.*;
import org.xml.sax.*;
import java.io.*;
import java.util.*;
import java.net.*;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.*;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.Attributes;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
* @author  JAVA
* @version
public class ReaderConnector{
    public ReaderConnector() {
    /*Login URl doesnt change*/
    private  String loginUrl  = "http://a.b.c.com:5280/vega/request?method=login&ui=ch16132-user&pwd=pass";
    //private  String loginUrl  = "c://temp/test.xml";
    private String sessionId;
    public String getSessionId(){
        if(sessionId == null){
            createConnection();
            return sessionId;
        }else{
            return sessionId;
    public void createConnection() {
        DataInputStream inputStream = null;              
        BufferedReader reader = null;
         InputStream in = null;
         FileOutputStream fos= null;
         //System.setProperty("javax.xml.parsers.SAXParserFactory",  "org.apache.xerces.jaxp.SAXParserFactoryImpl");
        try {
            URL url = new URL(loginUrl);
            URLConnection connection = url.openConnection();               
            connection.setUseCaches(false);               
            System.out.println(" Initiating Connection to System URL =  " + "http://a.b.c.com:5280/vega/request?method=login&ui=ch16132-usr&pwd=pass");
            connection.connect();
            System.out.println(" Connected ..");
            System.out.println(" Opening Stream for reading data ");
             in = new BufferedInputStream (new DataInputStream (connection.getInputStream()));                                                               
            System.out.println("Got input stream "+ in);
            reader = new BufferedReader(new InputStreamReader(new BufferedInputStream(in)));                               
            System.out.println("Got reader "+ reader);
            System.out.println("Read login file ...");
            parseStream(reader);
        }catch (Exception e) {
                System.out.println(e.getMessage());               
        }finally {
            try {
                in.close();
                    //fos.close();
                if (inputStream != null) {
                    inputStream.close();
                if(reader!=null){
                    reader.close();
            } catch (Exception ex) {
                System.out.println(ex.getMessage());
                ex.printStackTrace();
     public void parseStream(BufferedReader br){
        System.out.println("Parsing ...");
        try{           
            /*SAXParserFactory spf = SAXParserFactory.newInstance();
            spf.setValidating(false);
            spf.setNamespaceAware(false);
            org.xml.sax.Parser sp = (org.xml.sax.Parser)spf.newSAXParser();
            //sp.isValidating(false);
            sp.setDTDHandler(new Resolver());
            //sp.setDocumentHandler(new Handler());
            InputSource iSource = new InputSource(br);
            Handler h = new Handler();
            sp.parse(iSource );            */
          XMLReader parser;
          parser = XMLReaderFactory.createXMLReader();
          parser.setContentHandler(new Handler());
         parser.setDTDHandler(new Resolver());
          parser.parse(new InputSource(br));
        }catch(Exception e){
            System.out.println(e.getMessage());
        System.out.println("Parsed");
    public static void main(String [] args){
        ReaderConnector connector = new ReaderConnector ();
        //connector.testParsing("c://temp/test.xml");
        connector.createConnection();
    private class Resolver extends DefaultHandler{
        public InputSource resolveEntity(String publicId, String systemId) throws SAXException {
      System.err.println(publicId + " ! " + systemId);
      if (("/vega/xml/xrf.dtd").equalsIgnoreCase(systemId) || ("/vega/xml/xrf.dtd").equalsIgnoreCase(publicId))
        try {
          return new InputSource(new URL("http://a.b.c.com:5280"+systemId).openStream());
        } catch (MalformedURLException e) {
          throw new SAXException(e);
        } catch (IOException e) {
          throw new SAXException(e);
      else return null;
    private class Handler extends org.xml.sax.helpers.DefaultHandler{                      
        public void startDocument() throws org.xml.sax.SAXException {
            System.out.println("Start of Login document");           
        public void endDocument() throws org.xml.sax.SAXException {           
            System.out.println("End of document");
        public void ignorableWhitespace(char[] values, int param, int param2) throws org.xml.sax.SAXException {
        public void endElement(java.lang.String str, java.lang.String str1, java.lang.String str2) throws org.xml.sax.SAXException {
            System.out.println("End of element reached: str, str1, str2 "+ str + " , "+ str1 + " , "+ str2);
            System.out.println("Session ID "+ sessionId);
        public void skippedEntity(java.lang.String str) throws org.xml.sax.SAXException {           
        public void processingInstruction(java.lang.String str, java.lang.String str1) throws org.xml.sax.SAXException {           
        public void startElement(java.lang.String str, java.lang.String str1, java.lang.String str2, org.xml.sax.Attributes attributes) throws org.xml.sax.SAXException {                            
            if(("A").equals(str2)){
                for(int i=0; i< attributes.getLength();i++){
                    System.out.println("Attribute "+ i + ", Name, Value "+ attributes.getQName(i) + ", " + attributes.getValue(i));
                    if(("v").equalsIgnoreCase(attributes.getQName(i)))
                        sessionId = attributes.getValue(i);
        public void endPrefixMapping(java.lang.String str) throws org.xml.sax.SAXException {
        public void startPrefixMapping(java.lang.String str, java.lang.String str1) throws org.xml.sax.SAXException {
        public void characters(char[] values, int param, int param2) throws org.xml.sax.SAXException {           
            String s =  new String(values);
            String text = s.substring(param, param+param2);                       
        public void setDocumentLocator(org.xml.sax.Locator locator) {
XML File
  <?xml version="1.0" encoding="ISO-8859-1" ?>
  <!DOCTYPE XRF (View Source for full doctype...)>
- <XRF r="2.11.1" c="" g="" u="ch16132-user" k="" d="20050614" t="151146">
  <A k="i0005" n="3" v="1964216949" />
  </XRF>
****When you view source*******
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE XRF SYSTEM "/vega/xml/xrf.dtd">
<XRF r="2.11.1" c="" g="" u="ch16132-user" k="" d="20050614" t="151722">
<A k="i0005" n="3" v="350287547"/>
</XRF>