[jdom-interest] help !!!!!

Mon Jun 4 15:27:04 PDT 2001

Hi earlier today, I had posted a request for help with some application to Servlet using xml over http scenario.. I am attaching code of the three pieces here, I am facing a java.io.FileNotFoundException and I am lost

Attached is the code and below is the console output of the same along with PrintStackTrace output

*****Application.java *****

<pre>

package apps;

import java.net.*;
import java.io.*;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.jdom.Attribute;
import org.jdom.Comment;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;

public class Application {

public  String hostName = "localhost/";
public String webServerStr = "http://krishna/servlet/MyServlet?xml=";

String resource="session";
String userid="kris";
String password="kris";

String xml="";

public void init()
        {
        log("Constructing the xml stream");
        String doc;

        doc =createDocument();
        webServerStr = webServerStr+doc;   // this bombs with the FileNotFoundException given below  , if I do not use this no error is thrown but ofcourse the resource would not be found in the Servlet..

         try
        {
            // connect to the servlet
        System.out.println("Connecting to servlet...");
           URL url = new URL( webServerStr );
            URLConnection servletConnection = url.openConnection();  
         System.out.println("Connected");

            // inform the connection that we will send output and accept input
                servletConnection.setDoInput(true);          
         servletConnection.setDoOutput(true);

            // Don't used a cached version of URL connection.
            servletConnection.setUseCaches (false);

            // Specify the content type that we will send binary data
            servletConnection.setRequestProperty
                ("Content-Type", "application/octet-stream");

         // send the student object to the servlet using serialization
         sendToServlet(servletConnection, webServerStr);

         // now, let's read the response from the servlet.
         // this is simply a confirmation string
               readServletResponse(servletConnection);         

     }
     catch (Exception e)
     {
         System.out.println("ERROR " +e.toString());    
     }

        }

public static String createDocument() 
    {
    String xmlString="";

        // Create the root element
        Element sessionElement = new Element("session");
        //create the document

        Document myDocument = new Document(sessionElement);

        //add a comment
        sessionElement.addContent(new Comment("Session Element "));

        //add some child elements
        /*
         * Note that this is the first approach to adding an element and
         * textual content.  The second approach is commented out.
         */
        Element resource = new Element("resource");
        resource.addContent("session");
        sessionElement.addContent(resource);

        //add some more elements
        sessionElement.addContent(new Element("useridElement").addContent("kris"));
        sessionElement.addContent(new Element("passwordElement").addContent("kris"));

          //print the document

        try 
        {
            XMLOutputter outputter = new XMLOutputter("  ", true);
            outputter.output(myDocument, System.out);
            System.out.println("XMLOUtputter created");
            xmlString=outputter.outputString(myDocument);
        } 
        catch (java.io.IOException e) 
        {
            e.printStackTrace();
        }

        //return myDocument;
        return xmlString;
    }

public void sendToServlet(URLConnection servletConnection, String ourRequest)
{
 ObjectOutputStream outputToServlet = null;

        try
        {
         // send the request object to the servlet 
         log("Sending the request to the servlet...");
         outputToServlet = new ObjectOutputStream(servletConnection.getOutputStream());

         // serialize the object
         //outputToServlet.writeObject(ourRequest);

         outputToServlet.flush();         
         outputToServlet.close();
         System.out.println("Complete.");
        }
        catch (IOException e)
        {
                 System.out.println("Bombed in sendToServlet()");
        }

}

protected void log(String msg)
 {
     System.out.println("Message === " +msg );    
 }

        /**
  *  Reads a response from the servlet.
  */
    public void readServletResponse(URLConnection servletConnection)
    {
        BufferedReader inFromServlet = null;

        try
        {
         // now, let's read the response from the servlet.
         // this is simply a confirmation string
         inFromServlet = new BufferedReader(new InputStreamReader(servletConnection.getInputStream()));

            String str;
            while (null != ((str = inFromServlet.readLine())))
            {
                System.out.println("Reading servlet response: " + str);
            }

            inFromServlet.close();
        }
        catch (IOException e)
        {
          log(e.toString()); 
          log("readServletResponse problem");   
        }
    } 

    public static void main(String[] args) 
    {
     Post post = new Post();
     post.init();   

    }
}

</pre>

** end code Application.java****

***MyServlet.java****

package myservlets;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import app.myapps.util.*;

public class MyServlet extends HttpServlet
{

/**
* Parameterless constructor , that invokes the super class constructor
*/
  public MyServlet()
   {
   super();
   }

     public void service(HttpServletRequest req, HttpServletResponse res)
 throws IOException, ServletException
 {

           init(req,res);
           String xml = req.getParameter("xml");
           String value = Parser.getResourceTag(xml);

  System.our.println(" resource is == " +value);
 }

         public void init(HttpServletRequest req, HttpServletResponse res)
         {
          addServerInfo(req);
         }

         private void addServerInfo(HttpServletRequest req)
   {
  String prot = req.getProtocol();
  path = req.getServletPath();

   if (prot.indexOf("/")>0)
   {
   prot = prot.substring(0,prot.indexOf("/"));
   }
  path = path.substring(0,path.lastIndexOf("/"));
                path = "/app"+path;
                System.out.println("PATH = " +path);

               //sinfo=prot+"://"+req.getServerName()+":"+req.getServerPort()+path;
               sinfo=prot+"://"+req.getServerName()+":"+req.getServerPort()+path;
               svrInfo= prot+"://"+req.getServerName()+":"+req.getServerPort();

               System.out.println("SINFO == "+sinfo);
               System.out.println("SVRINFO --"+svrInfo);

   }

}

***end Myservlet.java code *******

****** Parser.java

public class Parser {

 public void Parser() 
 {
 }

  public static String getResourceTag(String XmlStream)
  {

    String Xml;
    Xml = parseXml(XmlStream);
    //System.out.println("XML IN getResourceTag --->" +Xml);
  return Xml;

  }

  public static String parseXml(String XmlStream)
  {
  String resource="";
  Document doc;
   try
   {
   System.out.println("inside parseXML");

     SAXBuilder sax = new SAXBuilder();
     System.out.println("Built the SAXBUilder inside parseXML");
     doc = sax.build(new StringReader(XmlStream));

     Element root = doc.getRootElement();

     Element r = root.getChild(resource);

     String re = r.toString();
     System.out.println("String value of resource in parser -->" +re);
     resource = re;

     }
     catch(JDOMException e) 
     {
            e.printStackTrace();
     }
   catch (Exception e)
   {
   e.printStackTrace();
   System.out.println("parsing exception");
    }

     return resource;
  }

  protected void log(String msg)
 {
     System.out.println("Message  in XMLResourceTag=== " +msg );    
}

}                                   

*******end Parser.java code******

Message === Constructing the xml stream
XMLOUtputter created
After serialize--><?xml version="1.0" encoding="UTF-8"?>
<session>
  <!--Session Element -->
   <resource>session</resource>
    <useridElement>kris</useridElement>
  <passwordElement>kris</passwordElement>
</session>

WESERVER STRING --->http://kmuthyal/servlet/MyServlet?xml=<?xml version="1.0" encoding="UTF-8"?>
<session>
  <!--Session Element -->
  <resource>session</resource>
  <useridElement>kris</useridElement>
  <passwordElement>kris</passwordElement>
  </session>

Connecting to servlet...
Connected
Message === Sending the request to the servlet...
Complete.
Message === reading response ...
Message === java.io.FileNotFoundException: http://kmuthyal/servlet/MyServlet??xml=<?xml version="1.0" encoding="UTF-8"?>
<session>
  <!--Session Element -->
  <resource>session</resource>
    <useridElement>kris</useridElement>
    <passwordElement>kris</passwordElement>
  </session>

</session>
Message === readServletResponse problem
java.io.FileNotFoundException: http://kmuthyal/servlet/MyServlet??xml=<?xml version="1.0" encoding="UTF-8"?>
<session>
  <!--Session Element -->
  <resource>session</resource>
    <useridElement>kris</useridElement>
    <passwordElement>kris</passwordElement>
  </session>
</session>
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at post.Post.readServletResponse(Post.java:196)
        at post.Post.init(Post.java:80)
        at post.Post.main(Post.java:217)

Any suggestions?

Thanks

Kris

concern for a cleaner world, for a better tomorrow 

         http://www.greenpeace.org

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