Re: POST through HTTPs

/*
 * Main.java
 *
 * Created on April 15, 2007, 10:05 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package oskcookies;

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

/**
 *
 * @author yccheok
 */
public class Main {

    /** Creates a new instance of Main */
    public Main() {
    }

/** Post a string to an URL and get the reply as a string. Returns an
empty
string if things didn't work out. */
    static public String getURLPostString(URL url, String body) {
        StringBuffer sb = new StringBuffer();

    // find the newline character(s) on the current system
        String newline = null;
        try {
            newline = System.getProperty("line.separator");
        } catch (Exception e) {
            newline = "\n";
        }

        try {
        // URL must use the http protocol!
            HttpURLConnection conn = (HttpURLConnection)
url.openConnection();
            conn.setRequestMethod("POST");
            conn.setAllowUserInteraction(false); // you may not ask
the user
            conn.setDoOutput(true); // we want to send things
            // the Content-type should be default, but we set it
anyway
            conn.setRequestProperty( "Content-type", "application/x-
www-form-urlencoded" );
            // the content-length should not be necessary, but we're
cautious
            conn.setRequestProperty( "Content-length",
Integer.toString(body.length()));

            // get the output stream to POST our form data
            OutputStream rawOutStream = conn.getOutputStream();
            PrintWriter pw = new PrintWriter(rawOutStream);

            pw.print(body); // here we "send" our body!
            pw.flush();
            pw.close();

            // get the input stream for reading the reply
            // IMPORTANT! Your body will not get transmitted if you
get the
            // InputStream before completely writing out your output
first!
            InputStream rawInStream = conn.getInputStream();

            // get response
            BufferedReader rdr = new BufferedReader(new
InputStreamReader(rawInStream));
            String line;

            while ((line = rdr.readLine()) != null) {
                sb.append(line);
                sb.append(newline);
            }
            return sb.toString();
        } catch (Exception e) {
        System.out.println("Exception "+e.toString());
        e.printStackTrace();
    }
        return ""; // an exception occurred
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        try {
            // Dynamically register the JSSE provider.
            java.security.Security.addProvider(new
com.sun.net.ssl.internal.ssl.Provider());
            // Set this property to use Sun's reference implementation
of the HTTPS protocol.
            System.setProperty("java.protocol.handler.pkgs",
"com.sun.net.ssl.internal.www.protocol");

            URL url = new java.net.URL("https://www.abc.com/
dologin.jsp");

            String txtUserName =
"txtUserName="+URLEncoder.encode("username");
            String txtPassword =
"txtPassword="+URLEncoder.encode("name");
            String _continue = "continue="+URLEncoder.encode("/
quotes.jsp");
            String sessionError =
"sessionError="+URLEncoder.encode("0");
            String body = txtUserName + "&" + txtPassword + "&" +
_continue + "&" + sessionError;

            /* https://www.abc.com/dologin.jsp?txtUserName=username&txtPassword=password&continue=%2Fquotes.jsp&sessionError=0
*/

            System.out.println(getURLPostString(url, body));
        }
        catch(java.net.MalformedURLException exp) {
            exp.printStackTrace();
        }
    }

}

please take note that, when i directly enter this URL in my web
browser (https://www.abc.com/dologin.jsp?
txtUserName=username&txtPassword=password&continue=
%2Fquotes.jsp&sessionError=0), the page can be login successful.

However, if I execute the above code, I get the following error:

Exception java.io.IOException: Server returned HTTP response code: 500
for URL: https://www.abc.com/dologin.jsp