Is it possible to replace an individual cookie in a request?

Question

Java

There is a store site, where the region is changed not by going to a specific URL, but by setting a specific cookie in Javascript. A sort of "protection" from robots.
Please tell me: is it possible between the first http request (where you need to get certain cookies, for example PHPSESSID) and the next one (where you need to get information about a product in a particular region) to change only 1 cookie, while leaving the rest unchanged ?
Can this be done in the standard java.net.URL or org.apache.http.client?
Or is there some alternative "lightweight" library?

Answer 1

The servlet receives the request, sets the cookie, and redirects to the desired page.

public class TestServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doGet(req, resp);
        Cookie[] cookies = req.getCookies();
        for (int i = 0; cookies != null && i < cookies.length; i++) {
            if ("MyCookie".equals(cookies[i].getName())) {
                resp.addCookie(cookies[i]);
            }
        }
        resp.sendRedirect("/myPage");
    }
}

Does this look like what you need?