encodeURL() example?
Can anyone direct me to a simple example (of code) showing the use of response.encodeURL()?
All of my seaches (both google and stackoverflow) only supply the difference between encodeURL() and encodeRedirectURL().
I'm looking for some simple code showing how it would be implemented to embed session information in a link.
Thanks, Jeff
Answer
Consider this one:
public void doGet (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
// Get the session object. Create a new one if it doesn't exist.
HttpSession session = req.getSession(true);
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<head><title> " + "SessionServlet Output " +
"</title></head><body>");
out.println("<h1> SessionServlet Output </h1>");
// Set up a session hit counter. "sessionservlet.counter" is just the
// conventional way to create a key for the value to be stored in the
// session object "dictionary".
Integer ival =
(Integer) session.getAttribute("sessionservlet.counter");
if (ival == null) {
ival = new Integer(1);
}
else {
ival = new Integer(ival.intValue() + 1);
}
// Save the counter value.
session.setAttribute("sessionservlet.counter", ival);
// Report the counter value.
out.println(" You have hit this page <b>" +
ival + "</b> times.<p>");
// This statement provides a target that the user can click
// to activate URL rewriting. It is not done by default.
out.println("Click <a href=" +
res.encodeURL(HttpUtils.getRequestURL(req).toString()) +
">here</a>");
out.println(" to ensure that session tracking is working even " +
"if cookies aren't supported.<br>");
out.println("Note that by default URL rewriting is not enabled" +
" due to its large overhead.");
// Report data from request.
out.println("<h3>Request and Session Data</h3>");
out.println("Session ID in Request: " +
req.getRequestedSessionId());
out.println("<br>Session ID in Request is from a Cookie: " +
req.isRequestedSessionIdFromCookie());
out.println("<br>Session ID in Request is from the URL: " +
req.isRequestedSessionIdFromURL());
out.println("<br>Valid Session ID: " +
req.isRequestedSessionIdValid());
// Report data from the session object.
out.println("<h3>Session Data</h3>");
out.println("New Session: " + session.isNew());
out.println("<br> Session ID: " + session.getId());
out.println("<br> Creation Time: " + new Date(session.getCreationTime()));
out.println("<br>Last Accessed Time: " +
new Date(session.getLastAccessedTime()));
out.println("</body>");
out.close();
}