ATG - session or request attribute coming as null when checkFormRedirect is called - atg

Question

In my ATG application, when I am redirecting user to jsp page with some parameters using checkFormRedirect, I am getting parameters as null. Please see below FormHandler code:
UserFormHandler:
public boolean handleUserRedirect(dynamo req, dynamo res){
//using request
req.setParameter("test", "testdata");
//using session
HttpSession session=req.getSession();
session.setAttribute("uname","testdata");
//redirect to test.jsp
return checkFormRedirect("/test/test.jsp","null",req,res);
}
test.jsp :
<% out.println(session.getAttribute("uname")); %>
<% String stErrorMsg=(String)session.getAttribute("uname");%>
<%=stErrorMsg %>
<% request.getParameter("test")%>
Also, I have tried using variable in my formHandler and setting value and still I am getting value as null. Can some help on this.

Answer 1

Generally, you cannot send a POST request using sendRedirect() method. You can use RequestDispatcher to forward() requests with parameters within the same web application, same context.
RequestDispatcher dispatcher = servletContext().getRequestDispatcher("test.jsp");
dispatcher.forward(request, response);
The HTTP spec states that all redirects must be in the form of a GET (or HEAD). You can consider encrypting your query string parameters if security is an issue. Another way is you can POST to the target by having a hidden form with method POST and submitting it with javascript when the page is loaded.
So you can use Session approach: I tried out I get the value in JSP.
<%
out.println(session.getAttribute("message"));
session.removeAttribute("message");
%>
/* Or using JSTL */
<c:out value="${sessionScope.message}" />
<c:remove var="message" scope="session" />
screenshot
Hope this help.