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Cookie access with EL expression

Tuna Töre

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posted 8 years ago

I want to access a cookie by a JSP with EL expression however I can't get the value part.. Here my servlet code that creates a cookie;

And the code extract from JSP

Cookie easy access :

- Not working

I can get the cookie with the code below however I need to learn how to access only EL expression thank you for your answers...

//cookie reader code
Cookie[] cookies = request.getKookies(); // changed intentionaly to getKookies() (C->K) because there is a hacker control for specific method!!! java ranch ruless.
for(Cookie c : cookies)
{
if(c.getName().equals("username"))
{
String username = c.getValue();

response.getWriter().print("welcome " + username);
break;
}
}
[ December 12, 2008: Message edited by: Anut Walidera ]

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sudipto shekhar

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posted 8 years ago

Hey I tried out your code and it's working fine.
The name is displayed in the next jsp page.

Can you show your code to us so that we can understand it?
What is the error message that you are getting?

Thank you.

Regards, Sud.
SCJP 5 ScjpFAQ JLS

Tuna Töre

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Posts: 220

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posted 8 years ago

Cookie easy access :

code:
--------------------------------------------------------------------------------

${cookie.username.value }

--------------------------------------------------------------------------------

- Not working

Did you tried with this code!! I tried again it is not working....

sudipto shekhar

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posted 8 years ago

Yes my dear I tried out the same.

Why don't you post your code along with the error message!

Regards, Sud.
SCJP 5 ScjpFAQ JLS

Tuna Töre

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posted 8 years ago

There is no error message, nothing is printed...

below is my servlet and JSP code...

package com.tt.serlvlets;
 
import java.io.IOException;
import java.io.PrintWriter;
 
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.Kookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
 
import com.tt.attributeobjects.Person;
 
/**
 * Servlet implementation class TestingServlet
 */
public class TestingServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public TestingServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
 
/**
 * @see Servlet#init(ServletConfig)
 */
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
 
/**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

doPost(request, response);
}
 
/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

if(request.getParameter("param1") == null) 
{
//kookie creater code
Kookie kookie =  new Kookie("username","Anthony");
kookie.setMaxAge(30*60); //30 minutes
response.addKookie(kookie); 
response.getWriter().write(" kookie created!!!");
}

}
 
}

I call my servlet with another jsp page

and I have seen kookie created!!! in the output

Then I call my jsp page.....
below is jsp code

IMPORTANT NOTE: I changed all 'c' ' with 'k' because JAVARANCH security policies requires it!!!

[ December 12, 2008: Message edited by: Anut Walidera ]

[ December 12, 2008: Message edited by: Anut Walidera ]

EDITED :thumb:
[ December 12, 2008: Message edited by: Anut Walidera ]

sudipto shekhar

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posted 8 years ago

Please edit your post and put your code using UBB code.

Thank you.

Regards, Sud.
SCJP 5 ScjpFAQ JLS

Tuna Töre

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Posts: 220

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posted 8 years ago

I have edited!! and I am really confused It should be worked!I think nothing seems wrong but I can't see the Value of the cookie!!!

I only see on the jsp

Cookie easy access :

but value prints nothing!!!

[ December 12, 2008: Message edited by: Anut Walidera ]

sudipto shekhar

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posted 8 years ago

Originally posted by Anut Walidera:
There is no error message, nothing is printed...

below is my servlet and JSP code...

your code is just fine. public TestingServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if(request.getParameter("param1") == null) { //kookie creater code (USE C)(USE c)Kookie kookie = (Use c) new Kookie("username","Anthony"); kookie.setMaxAge(30*60); //30 minutes response.addKookie(kookie); response.getWriter().write(" kookie created!!!"); } } }
I call my servlet with another jsp page
< form action="/ApacheProject/servlets/test.exe" method="post"> <input type ="submit" value="Kookie Create" /> </form>

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> Kookie easy access : ${kookie.username.value } </body> </html>

Make sure you type the C and c very carefully.

I got the name in my jsp whit the same code you posted.

I repeat "Make sure you type the C and c very carefully."
[ December 12, 2008: Message edited by: Sudipto Shekhar ]

Regards, Sud.
SCJP 5 ScjpFAQ JLS

Tuna Töre

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Posts: 220

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posted 8 years ago

No it is not the problem I just changed C to K while I posting code to forum , normally there isn't any K in my code...
Yes you are right I tried in different machine, It works...

But I do not know Why it didn't work in the other machine...

This is not the reason.... There should be other thing but what ?

[ December 12, 2008: Message edited by: Anut Walidera ]
[ December 12, 2008: Message edited by: Anut Walidera ]

Cookie access with EL expression

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