/**
* If oEmbed request wants XML, return XML instead of JSON.
*
* Basically a copy of {@link _oembed_rest_pre_serve_request()}. Unfortunate
* that we have to duplicate this just for a URL check.
*
* @since 2.6.0
*
* @param bool $served Whether the request has already been served.
* @param WP_HTTP_ResponseInterface $result Result to send to the client. Usually a WP_REST_Response.
* @param WP_REST_Request $request Request used to generate the response.
* @param WP_REST_Server $server Server instance.
* @return bool
*/
public function oembed_xml_request($served, $result, $request, $server)
{
$params = $request->get_params();
if (!isset($params['format']) || 'xml' !== $params['format']) {
return $served;
}
// Validate URL against our oEmbed endpoint. If not valid, bail.
// This is our mod to _oembed_rest_pre_serve_request().
$query_params = $request->get_query_params();
if (false === $this->validate_url_to_item_id($query_params['url'])) {
return $served;
}
// Embed links inside the request.
$data = $server->response_to_data($result, false);
if (!class_exists('SimpleXMLElement')) {
status_header(501);
die(get_status_header_desc(501));
}
$result = _oembed_create_xml($data);
// Bail if there's no XML.
if (!$result) {
status_header(501);
return get_status_header_desc(501);
}
if (!headers_sent()) {
$server->send_header('Content-Type', 'text/xml; charset=' . get_option('blog_charset'));
}
echo $result;
return true;
}