dear plack experts.  I am submitting a test form's data with POST, and am trying to read the submission with Plack.  My first attempt was
if (defined($postparamref=$req->body_parameters->get_all())) {
}
which did not work.  using Data::Dumper on $req, I see that the method is a post and I am guessing that all the posted data is in $req->psgi.input.  Otoh, maybe my app needs an enable in the builder first?
a short example showing how to iterate over all post entries would be highly appreciated.
regards,
/iaw