使用jquery将请求转发到servlet，而j​​Query又转发到jsp？

Question

I have a js file and based on the below condition I need to display a message or forward the request to servlet which in turn forwards to jsp.

var isInIframe = (parent !== window),
    if (isInIframe) {
        //Forward request to servlet
    }else {
        //Display Access denied message
    }

I can call a servlet using jquery ajax. But how can I forward request to servlet? once the request is forwarded to servlet then servlet will load some property files and forwards request to some.jsp as below.

//Keeps some values using request.setAttribute() then forward the request
request.getRequestDispatcher("/WEB-INF/some.jsp").forward(request, response);

How can i do that? Thanks!

Answer 1

You can use Session for sending some objects to servlet. Because session remains same for the user throughout the application.

Answer 2

JQuery/Javascript does not "forward" requests to web applications. It makes new requests via AJAX or redirects. JQuery itself does not handle HTTP requests.

You need to make an AJAX request for this. I assume that JSP is the presentation layer of your web application. So just make an ajax request to your web app using the JQuery $.ajax() method..

You can handle the response using the AJAX callback function

Answer 3

Servlet and jsp are server-side components. The Server receives HTTP requests and dispatches a Servlet to handle them by producing a corresponding HTTP response for each of them, some times with the help of a jsp .

Javascript is a client-side component. It runs in the browser. When the javascript runs, the HTTP response containing the HTML you see in the browser has already been sent, so the Servlet is completely out of the picture. You cannot forward to it like you are imagining with

request.getRequestDispatcher("/WEB-INF/some.jsp").forward(request, response);

What you can do is use ajax to construct and send a new HTTP request that will be handled by a Servlet .