sub post {
    my ($self, $action, $xml) = @_;
    my $url = $self->location;

    cluck "The mech attribute has been deprecated and is replaced by ua attribute!"
        if $self->has_mech;

    $self->clear_response;
    my $response = $self->ua->post(
        $url,
        'Content-Type'     => $self->content_type,
        'SOAPAction'       => qq{"$action"},
        'Proxy-Connection' => 'Keep-Alive',
        'Accept-Encoding'  => 'gzip, deflate',
        Content            => $xml->toString,
    );
    $self->response($response);

    return $response->decoded_content;
}