[racket] bindings without request

Hi all,
I've misunderstood the bindings from the webserver.

I have a cgi program wich displays a webpage with an input field named
number at 127.0.0.1/cgi-bin/input and wich calls (via a form)
/cgi-bin/extract-input.

For example, after sending, the url could be
127.0.0.1/cgi-bin/extract-input?number=42

How can i extract in my cgi program extract-input the number 42 ?

(This works perfectly when i launch a local program with a (start request)
and when i use (extract-bindings request) or (cdr (assq 'number request)) ..
but here, there is no request ... )

Thanks alot,
-mw
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