Java Mail Problem Help!!

[Stephen Batsas]

Dear Ranchers

Can anyone help me with this problem:

I have created a servlet using javamail api. When I test the servlet I get a null pointer exception thrown by the InternetAddress class. See the source code comment //******. The mail is sent and received succesfully by the recipient although a null pointer is thrown. The stack trace states the problem occurs at line 569 of InternetAddress.java. I dont have the source code.

I have disguised the problem behind a friendly error page that refreshes and redirects back to the home page.

Source code as follows:

 
package tsl.mail;
 
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
 
public class MailServlet extends HttpServlet{
 
    ....
 
    public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
         // retrieve form parameter values
            String to = request.getParameter("to");
            String from = request.getParameter("from");
            String subject = request.getParameter("subject");
            String message = request.getParameter("message");
 
            // Create a session with the mail server
            Properties props = new Properties();
            props.put("mail.host","gwmail.nmit.vic.edu.au");
            Session mailSession = Session.getInstance(props,null);
         
 
            try{
 
                // Create address objects - null pointer is thrown next line
                Address fromUser = new InternetAddress(from); // *******
                Address toUser = new InternetAddress(to);
            
                // Create the message body
                Message body = new MimeMessage(mailSession);
                body.setFrom(fromUser);
                body.setRecipient(Message.RecipientType.TO, toUser);
                body.setSubject(subject);
                body.setContent(message,"text/plain");
        
                Transport.send(body);
 
            }catch(AddressException ae){
                throw new ServletException(ae.getMessage());
            }catch(MessagingException me){
                throw new ServletException(me.getMessage());
            }catch(NullPointerException npe){
                 throw new ServletException(npe.getMessage());
            }
 
    } // doGet    
 
 
} // MailServlet

Regards
Stephen Batsas
SCPJ
SCWCD

[ Jess added UBB [code] tags to perserve whitespace ]
[ September 02, 2004: Message edited by: Jessica Sant ]

[Paul Sturrock]

request.getParameter("from");

Must be a null returned here. As part of the InternetAddress(String address) constructor the address is parse to check validity - if there's no address then the parsing will complain.

[Stephen Batsas]

Thanx for prompt reply.

Regards
Stephen Batsas
SCPJ
SCWCD