HttpServletRequest - previous page from which current page is requested

When a servlet is invoked, I want to know from which page of the browser this servlet is invoked.
in other words...
Is it possible to find out (from the HttpServletRequest object) which is the previous page of the browser from which the servlet request has come in?
Thanks
Edited by: mhakimz on Jan 30, 2008 3:08 PM

One solution is to add the referer as a parameter to the requested URL. This will only work if you have control over the referring page, or in other words: if you link to your servlet from one of your own pages. In that case, you could for example use a hidden field, or just append the referer to the URL: http://jump.here/my/servlet/?myReferer=<this-is-my-referer-url>. This way, you could get the referring URL by requesting
request.getParameter("myReferer")However, you may as well use the HTTP header called "referer":
request.getHeader("referer")See http://www.w3.org/Protocols/HTTP/HTRQ_Headers.html#z14. In this case, you rely on the client (browser) to send the referer header along with the request, as this is an optional header field. The latter solution will be a good one in many cases.

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