'http' => <<'END_OF_FUNC',
sub http {
    my ($self,$parameter) = self_or_CGI(@_);
    if ( defined($parameter) ) {
        $parameter =~ tr/-a-z/_A-Z/;
        if ( $parameter =~ /^HTTP(?:_|$)/ ) {
            return $ENV{$parameter};
        }
        return $ENV{"HTTP_$parameter"};
    }
    return grep { /^HTTP(?:_|$)/ } keys %ENV;
}
END_OF_FUNC