I can't figure out why the age of the cookies is -1 (i.e. for the duration of the session) instead of the age set by setMaxAge() method when the coookie is created.
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class KillCookies extends HttpServlet {
String cookiesString = ""; // to store cookie info: cannot add to the
// writer until all the cookies are added
// to the response
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
{
String toDo = request.getParameter("toDo");
// get the cookies array
Cookie[] cookies = request.getCookies();
// show cookies
if (toDo != null && toDo.equals("Show")) {
if (cookies.length > 0) {
addC("Your cookies: <P>");
for (int i = 0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
addC("Cookie Name: " + cookie.getName() + "<br>");
addC("Cookie Value: " + cookie.getValue() + "<br>");
addC("Cookie Age: " + cookie.getMaxAge() + "<br><BR>");
}
} else {
addC("No cookies detected!");
}
}
// give a cookie
else if (toDo != null && toDo.equals("Give")) {
String cookieName = request.getParameter("Name");
String cookieValue = request.getParameter("Value");
String cookieAge = request.getParameter("Age");
if (cookieName != null && cookieValue != null) {
Cookie cookie = new Cookie(cookieName, cookieValue);
cookie.setMaxAge((new Integer(cookieAge)).intValue());
response.addCookie(cookie);
addC("<P>");
addC("added a cookie. Name = " + cookieName);
addC(" Value = " + cookieValue + " Age = " + cookieAge + "<P>");
}
// erase cookies:
} else if (toDo != null && toDo.equals("Kill")) {
for (int i = 0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
cookie.setMaxAge(0); // set the max age to 0
response.addCookie(cookie); // add them to the response
}
addC("Cookies erased!");
}
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<body bgcolor=\"white\">");
out.println("<head>");
out.println("<title> Cookies!</title>");
out.println("</head>");
out.println("<body>");
out.println("<b>One of the cookies is the session cookie<BR>");
out.println("It's generated automatically!</b><P>");
out.println(cookiesString);
cookiesString = "";
out.print("<form action=\"");
out.println("KillCookies\" method=POST>");
out.println("<input type=hidden name=\"toDo\" value=\"Show\">");
out.println("<input type=submit value=\"Show cookies\"></form>");
out.println("<P>");
out.print("<form action=\"");
out.println("KillCookies\" method=POST>");
out.println("Name: ");
out.println("<input type=text size=15 name=\"Name\"><P>");
out.println("Value: ");
out.println("<input type=text size=15 name=\"Value\">");
out.println("<P>");
out.println("Age: ");
out.println("<input type=int size=10 name=\"Age\">");
out.println("<P>");
out.println("<input type=hidden name=\"toDo\" value=\"Give\">");
out.println("<input type=submit value=\"Give a cookie\"></form>");
//out.println("<P>");
out.print("<form action=\"");
out.println("KillCookies\" method=POST>");
out.println("<input type=hidden name=\"toDo\" value=\"Kill\">");
out.println("<input type=submit value=\"Erase 'em all!\"></form>");
out.println("</body>");
out.println("</html>");
}
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
{
doGet(request, response);
}
private void addC(String s) {
cookiesString = cookiesString + s;
}
}