If you're trying to re-define WWW::Mechanize's _make_request method, maybe 
...
package WWW::Mechanize;

sub _make_request {
    my($self) = shift;
    my $req = $self->SUPER::request(@_);
    print Dumper $req;
    return $req
}
...

[download]
is what you want ? Another possible problem might be that you suppose that WWW::Mechanize's STDOUT (where Dumper would write to) is something that comes in handy to you. That isn't really granted ;)

In reply to Re: Intercepting the HTTP::Request by Krambambuli
in thread Intercepting the HTTP::Request by rootcho

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