URGENT - Posting a XML file to a listener URL

Question

Hi all,
I have a situation like this: A servlet Client should post a XML file
to a listener URL, and the listener responds back with a XML file
after the processing the posted XML file.
1. Before posting, the servlet client should establish a session with
the server on which the listener URL is sitting and the Server will
return a cookie with the authentication credentials to the servlet
client.
2. That cookie should be added to the HTTPResponse and then the
posting of the file should happen.
The first part is happening okay ..and i could add that cookie to the
HTTPresponse.
Now, did anyone successfully post a XML file to a listener URL like this from a servlet?
I tried using URLConnection, but my cookie got lost and i got back a 401 error. The key there is i should use the same HTTPrequest and HTTPresponse objects, as the cokie needs to be retained!
Any example code please!!
thanks a lot
Rox

Answer 1

Thanks for your response, but i dont think using authenticator would work. To tell you exactly what is happening there, the url to which the sevlet posts the XML file is protected by Siteminder ( a Enterprise securty platform) and all it requires is a cookie with authenticated credentials on the httprequest/httpresponse objects which are trying to post to that URL. If it find the cookie with the credentials, then the requestor will not be challenged for credentials.
Here is what i am doing:
String urlString = "http://webservicesURL.com/ws";
Cookie SMSESSION = setSMSession();
          if(SMSESSION != null)
               response.addCookie(SMSESSION);     
          System.out.println("\n..Cookie confirmation..\n"+SMSESSION.getName()+" : "+SMSESSION.getValue());
URL u = new URL(urlString);
          URLConnection conn = u.openConnection();
          conn.setDoOutput(true);
          conn.setDoInput(true);
          conn.setRequestProperty(SMSESSION.getName(),SMSESSION.getValue());
          OutputStream out = conn.getOutputStream();
BufferedReader in = new BufferedReader(new FileReader(file));
          while((s = in.readLine())!= null)
               xml_line = xml_line+s;
          writer.println("The XML file is ..\n");
          writer.println(xml_line);
          writer.println("\n\n\n");
          out.write(xml_line.getBytes());
          InputStream ins = conn.getInputStream();
when i execute the servlet, i get a tomcat error 401 on the last line above.
So the new URLConnection that is being opened, is not carying the credentials with it, or the siteminder is unable to read the credentails from the URLConnection. But i am positive that it can read the credentials from the cookie from the HttpResponse object.
Do you have any more ideas, please?
thanks