> Can I write a servlet that transparently extract specific information
> from HTML pages before they are sent to the browser?
> By transparency I mean that nothing must be changed in html pages
> of an already running Web site?
> In addition how the already written servlets can be maintained without
> changes but doing their normal job?
This is usually called filtering. Jason Hunter's _Java Servlet
Programming_ book (O'Reilly) discusses it briefly (pages 31 and
176-178). Details depend on your web server / servlet engine, but
essentially you can tell the server that certain files need to be
handled specially, running them through a servlet before sending the
results back to the user.
(The example Hunter gives is defining a servlet to remove the
<BLINK> tag from all pages :-).
Steven J. Owens
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