TP client.<p>
</ul>


<h4><a name = "S6.4">6.4 Filter</a></h4>

A Filter FastCGI application receives all the information associated
with an HTTP request, plus an extra stream of data from a file stored
on the Web server, and generates a "filtered" version of the data
stream as an HTTP response.<p>

A Filter is similar in functionality to a Responder that takes a data
file as a parameter.  The difference is that with a Filter, both the
data file and the Filter itself can be access controlled using the Web
s