From: Shing Wai Chan <shing.wai.chan_at_oracle.com>
Date: Thu, 14 Feb 2013 16:08:49 -0800

I am looking at http://java.net/jira/browse/SERVLET_SPEC-43
("Clarify behaviour of HttpServletResponse#encodeURL() with relative URLs")

In HttpServletResponse, we also have #encodeRedirectURL.
 From javadoc of #encodeRedirectURL, we have
"All URLs sent to the HttpServletResponse.sendRedirect method should be
run through this method."

In this case, #encodeRedirectURL should be relative to current
HttpServletRequest.
(We need to clarify this in the spec.)

Should we also apply the same "relative" principle to #encodeURL?
If yes, then we have the following:
* Suppose a http request comes to http://localhost:8080/a/myservlet
* Inside myservlet, it is an error to call
         out.println(request.encodeURL("../../../../../a.jsp"));
   the url is "not" used for redirect here.
Is it ok?

      Shing Wai Chan