MIDP invalidating cookie
I have the following code :
privatevoid connect(){
String url = getAppProperty("SessionMIDlet.URL");
try{
// Query the server and retrieve the response.
HttpConnection hc = (HttpConnection)Connector.open(url);
if (mSessionIDCookie !=null)
hc.setRequestProperty("Cookie", mSessionIDCookie);
InputStream in = hc.openInputStream();
String cookie = hc.getHeaderField("Set-Cookie");
if (cookie !=null){
int semicolon = cookie.indexOf(';');
mSessionIDCookie = cookie.substring(0, semicolon);
}
int length = (int)hc.getLength();
byte[] raw =newbyte[length];
in.read(raw);
String s =new String(raw);
Alert a =new Alert("Response", s, null,null);
a.setTimeout(Alert.FOREVER);
mDisplay.setCurrent(a, mMainForm);
in.close();
hc.close();
}
catch (IOException ioe){
Alert a =new Alert("Exception", ioe.toString(), null,null);
a.setTimeout(Alert.FOREVER);
mDisplay.setCurrent(a, mMainForm);
}
}
and the servlet:
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
publicclass SessionServletextends HttpServlet{
publicvoid doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException{
// Retrieve the session object corresponding to this request.
HttpSession session = request.getSession();
// Try to retrieve the user object from the session.
Object user = session.getAttribute("User-Information");
if (user ==null){
// Retrieve the user ID which is passed to us as a parameter.
String id = request.getParameter("user");
// Now look up the corresponding user information.
user = lookupUser(id);
// Put the user information into the session.
session.setAttribute("User-Information", user);
}
// Now process the request, using the user information we
// just looked up to customize our behavior. Write the
// response back to the client.
// For now, just compose a suitable reply message.
String message;
if (session.isNew())
message ="New session created: " + session.getId();
else
message ="Used existing session: " + session.getId();
// Send the message to the client.
response.setContentType("text/plain");
response.setContentLength(message.length());
PrintWriter out = response.getWriter();
out.println(message);
}
private Object lookupUser(String id){
// Most likely we would use JDBC[tm] to connect to a database,
// perform a query, package the results up as an object,
// and return that object. Most likely it would be a
// specific type, perhaps User, UserInformation,
// or UserPreferences.
returnnull;
}
}
I want to clear the cookie information. in the servlet i have added a method logout which i run and it has session.invalidate. Although it still stores the session id any ideas on how to clear the cookie i tried setting mSessionIDCookie to "" and null but no go.
