Para::Frame::Renderer::Custom - Present custom pages
$resp->render_output()
Burns the page and stores the result.
If the rendering failes, may change the template and URL. The new URL can be used for another call to this method.
This method is called by Para::Frame::Request/after_jobs.
Returns: the self, as a sender object
$rend->set_ctype( $ctype )
Defaults to text/html and charset UTF-8