How Do I Forward/Redirect Extra Parameters From JSP To ASP via POST?

[Josh Lam]

Hi,
I need to redirect from a JSP page to an existing ASP page.
I realized that I can use a request.sendRedirect(), however, I also need to send some new parameters (along with those I received through an earlier POST to my JSP page) to the ASP page. I am required to use POST because the ASP page is *expecting* a POST.
Unfortunately, I cannot change the existing ASP page to use GET.
Would appreciate any help.
Thanks!
--
Josh

[Zoe Peng]

Hello. every1,
I had the similar problem now.
how do you make it right finally?
as I know, sendRedirect() is just load another pages.
the redirect page I want to is also just support "POST" to get the param that I send it eariler.
Thanks in advance.

[Maky Chopra]

This can be done pretty easily.. I have done this with a standalone java program and am sure it could be done by setting the appropriate header methods.. I dont have the time to try this today, so i''' just paste the java code i used and you could use it as a startting point.
What is the data you need to send as a POST ? If its a username password, you will have to encode it.. Basically, you need to understand the HTTP format that your asp page is expecting and duplicate it using jsp.

public static void gotoLogin(){

BufferedReader data;
        String line;
        StringBuffer buf = new StringBuffer();
        StringBuffer sb = new StringBuffer();
        sb.append( URLEncoder.encode("user") + "=" );
        sb.append( URLEncoder.encode("USERNAME") );
        sb.append( "&" + URLEncoder.encode("pass") + "=" );
        sb.append( URLEncoder.encode("PASSWORD") );
        String formData = sb.toString();
 
        try {
                       
            URL page = new URL(url_login);
            

HttpURLConnection conn = (HttpURLConnection)page.openConnection();
conn.setRequestMethod("POST"); 
            conn.setRequestProperty("Content-type","application/x-www-form-urlencoded");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            PrintWriter pout = new PrintWriter( new OutputStreamWriter(conn.getOutputStream(), "8859_1"), true );
            pout.print( formData );
            pout.flush();

        InputStream in = conn.getInputStream();
        BufferedReader bf = new BufferedReader(new InputStreamReader(in));
        }
  
  catch (MalformedURLException e) {
           System.out.println("Bad URL: ");
        }
  
  catch (IOException ex) {
    System.err.println("IOException caught in connection: \n"+ex.getMessage());
    System.exit(1);
  }
}