The browser generates the HTTP headers and there are some rules
governing when they are to be sent.
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
This isn't really Tomcat specific so I'm marking [OT]
You may find more enthusiastic help on a JSP/Servlet list.
-Ben
On Wed, 2004-11-10 at 12:30, Paul Taylor wrote:
> I have a WebPage which can be called from two different webpages, and I
> wanted it to have a back button.
>
> Originally I had the calling pages passing a parameter to tell the
> called page what called it. Then someone pointed
> out <%=request.getHeader("REFERER")%> to m. This works much better.
>
> But I have 2 questions:
> 1. Where are these header values defined I've not beeen able to find a
> good source.
> 2. It worked when coming from my pages but I then tried going to
> another page (e.g www.sun.com) and then pasting in the url and it just
> returned null. Does referer only apply when hyperlink from another page ?
>
>
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