>>> Rick L Sample <[EMAIL PROTECTED]> 10-Feb-00 7:22:12 PM >>>
This:
...
if (session == null) {
res.sendRedirect("http://localhost:8080/error.html");
}
...
is an HTTP redirect, here's what happens:
1. the server sends a redirect response (temporary or permanent) to
the browser
2. the browser sends another request to the location specified by the
redirect response
ie: there are at least 2 network trips to retrieve the URL
>as opposed to:
...
String url="/jsp/shopping/EShop.jsp";
ServletContext sc = getServletContext();
RequestDispatcher rd = sc.getRequestDispatcher(url);
rd.forward(req, res);
...
is programmatic, it occurs *within* the servlet engine and therefore
does not cause any network traffic.
In essence you should only use HTTP redirects for redirecting, which
is not the same as forwarding a request.
Nic Ferrier
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