Sending a dom via http Post

Question

Hi,
for some reason unknown to me whenever I try to send a dom via http Post I get the following error:
org.xml.sax.SAXParseException: The root element is required in a well-formed document.
This is the source code:
package com.cyberrein.payunion.transaction;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
//xml lib
import org.w3c.dom.Document;
import org.w3c.dom.Element;
//weblogic xml lib
import weblogic.apache.xerces.dom.DocumentImpl;
import weblogic.apache.xml.serialize.DOMSerializer;
import weblogic.apache.xml.serialize.XMLSerializer;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
public class Xmltest extends HttpServlet {
//Initialize global variables
public void init(ServletConfig config) throws ServletException {
super.init(config);
//Process the HTTP Request
public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// Retrieve transaction data from HttpServletRequest.
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(false);
DocumentBuilder db = dbf.newDocumentBuilder();
Document docIn = db.parse(request.getInputStream());
String code = "XX";
String tranID = "000000";
String message = "This Card Is Invalid. Transaction Discontinued";
//Output dom
Document docOut = new DocumentImpl();
Element e = (Element)docOut.createElement("TransactionResponseData");
e.setAttribute("Code", code);
e.setAttribute("TransactionID", tranID);
e.setAttribute("Message", message);
docOut.appendChild(e);
FileOutputStream fos;
fos = new FileOutputStream("/victory");
DOMSerializer serX = new XMLSerializer(fos,null);
serX.serialize(docIn);
DOMSerializer ser = new XMLSerializer(response.getOutputStream(), null);
     ser.serialize(docOut);
     } catch (Throwable e) {e.printStackTrace();}
//Get Servlet information
public String getServletInfo() {
return "com.cyberrein.payunion.transaction.Xmltest Information";
package com.cyberrein.payunion.transaction;
import org.w3c.dom.*;
import org.apache.xerces.*;
import org.apache.xerces.dom.*;
import org.apache.xerces.parsers.*;
import org.apache.xml.serialize.*;
import org.xml.sax.*;
import java.net.*;
import java.io.*;
public class CardClient {
private String sURI;
public BufferedReader in
= new BufferedReader(new InputStreamReader(System.in));
public CardClient(String serverURI) {
sURI = serverURI;
public Document test(){
Document docIn = null;
try
//XML Document impl
     docIn = new DocumentImpl();
//Create the root element
     Element t = docIn.createElement("TransactionData");
Element k = docIn.createElement("Payunion.com");
k.appendChild( docIn.createTextNode("North American server") );
t.appendChild(k);
//Set attributes
t.setAttribute("cardnumber", "4444444444444444");
t.setAttribute("amount", "3000.67");
t.setAttribute("name", "tolu agbeja");
t.setAttribute("cvv2", "001");
t.setAttribute("pu_number", "ejs:pupk:23456");
t.setAttribute("expirydate", "0903");
t.setAttribute("address", "100 peachtree industrial");
t.setAttribute("zipcode", "30329");
docIn.appendChild(t);
catch (Throwable te)
te.printStackTrace();
return docIn;
public Document sendRequest(Document doc) {
     Document docOut = null;
     try {
     URL url = new URL("http://" + sURI);
     HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
     conn.setDoInput(true);
     conn.setDoOutput(true);
     OutputStream out = conn.getOutputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
XMLSerializer ser = new XMLSerializer( out, new OutputFormat("xml", "UTF-8", false) );
ser.serialize(doc);
while(!br.ready()){}
     DOMParser parser = new DOMParser();
     parser.parse(new InputSource(br));
     docOut = parser.getDocument();
catch (Throwable et)
     et.printStackTrace();
     return docOut;
public static void main(String []args)
CardClient c = new CardClient("cyber1:7001/xmltest");
try
Document doc = c.sendRequest(c.test());
Element responseMessage = (Element)doc.getElementsByTagName("TransactionResponseData").item(0);
String message = responseMessage.getAttribute("Message");
String tranID = responseMessage.getAttribute("TransactionID");
String code = responseMessage.getAttribute("Code");
System.out.println(message);
System.out.println("");
System.out.println("The Response Code Is: "+code);
System.out.println("");
System.out.println("The Transaction ID Is: "+tranID);
catch(Exception ex)
ex.printStackTrace();
All comments will be appreciated!!

Answer 1

Hi, thanks for your reply i knew the FileUplaod was the way forward.
I read topics advising to use the FileUpload and tried the following but it did not seem to work ( i get an HTTP Internal Server error when i try that):
try
DiskFileUpload upload = new DiskFileUpload();
boolean isMultipart = FileUpload.isMultipartContent(request);
if( isMultipart )
List items = upload.parseRequest( request );
Iterator iter = items.iterator();
while( iter.hasNext() )
FileItem fileItem = ( FileItem ) iter.next();
File uploadedFile = new File("myreceivedfile.zip");
fileItem.write( uploadedFile );
}catch (Exception e)
System.out.println("RECEIVER: " + e.getMessage());
Also DiskFileUpload,isMultipartContent and parseRequest have a line going through the middle (horizontal middle).
Edited by: Overmars08 on Jun 23, 2009 5:35 AM
Edited by: Overmars08 on Jun 23, 2009 5:36 AM