Protected url, form base

Question

i need access to a html protected page
for base authentication it's simple, i use a class like this :
public class MyAuthenticator extends Authenticator {
String username = "";
String password = "";
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password.toCharArray());
and I install the authenticator in the servlet
MyAuthenticator ma = new MyAuthenticator();
Authenticator.setDefault(ma);
my problem is to access form based protected resources, and i really don't know how ro do it.
Any idea?

Answer 1

mybe i have a solution, but i don't know if this is a good code.
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // log in ----------------------------------------------------------------
     String data = URLEncoder.encode("userid", "UTF-8") + "=" + URLEncoder.encode("mamma", "UTF-8");
data += "&" + URLEncoder.encode("password", "UTF-8") + "=" + URLEncoder.encode("aaa", "UTF-8");
//login
          URL url = new URL("http://localhost:8087/Mamma/j_security_check");
          URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
wr.flush();
          String key = "";
          String id = "";
          // Get session cookie ----------------------------------------------------------------
          if (conn != null)
               for (int i = 1;(key = conn.getHeaderFieldKey(i)) != null; i++)
                    if (key.equalsIgnoreCase("set-cookie"))
                         id = conn.getHeaderField(key);
                         id = id.substring(0, id.indexOf(";"));
                    }     //if
               }     //for
          }     //if
          String jSessionId = id;
// Get the response ----------------------------------------------------------------
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
System.out.println(line);
wr.close();
rd.close();
// access form base protected resource ---------------------------------------------------
URL url2 = new URL("http://localhost:8087/Mamma/situazione");
          URLConnection conn2 = url2.openConnection();
conn2.setDoOutput(true);
//System.out.println("jSessionId:"+jSessionId);
conn2.setRequestProperty("Cookie", jSessionId);
BufferedReader rd2 = new BufferedReader(new InputStreamReader(conn2.getInputStream()));
String line2;
while ((line2 = rd2.readLine()) != null) {
System.out.println(line2);
//wr2.close();
rd2.close();
     }