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<?php
/**
* WP_oEmbed_Controller class, used to provide an oEmbed endpoint.
*
* @package WordPress
* @subpackage Embeds
* @since 4.4.0
*/
/**
* oEmbed API endpoint controller.
*
* Registers the API route and delivers the response data.
* The output format (XML or JSON) is handled by the REST API.
*
* @since 4.4.0
*/
final class WP_oEmbed_Controller {
/**
* Register the oEmbed REST API route.
*
* @since 4.4.0
*/
public function register_routes() {
/**
* Filters the maxwidth oEmbed parameter.
*
* @since 4.4.0
*
* @param int $maxwidth Maximum allowed width. Default 600.
*/
$maxwidth = apply_filters( 'oembed_default_width', 600 );
register_rest_route(
'oembed/1.0',
'/embed',
array(
array(
'methods' => WP_REST_Server::READABLE,
'callback' => array( $this, 'get_item' ),
'args' => array(
'url' => array(
'required' => true,
'sanitize_callback' => 'esc_url_raw',
),
'format' => array(
'default' => 'json',
'sanitize_callback' => 'wp_oembed_ensure_format',
),
'maxwidth' => array(
'default' => $maxwidth,
'sanitize_callback' => 'absint',
),
),
),
)
);
register_rest_route(
'oembed/1.0',
'/proxy',
array(
array(
'methods' => WP_REST_Server::READABLE,
'callback' => array( $this, 'get_proxy_item' ),
'permission_callback' => array( $this, 'get_proxy_item_permissions_check' ),
'args' => array(
'url' => array(
'description' => __( 'The URL of the resource for which to fetch oEmbed data.' ),
'type' => 'string',
'required' => true,
'sanitize_callback' => 'esc_url_raw',
),
'format' => array(
'description' => __( 'The oEmbed format to use.' ),
'type' => 'string',
'default' => 'json',
'enum' => array(
'json',
'xml',
),
),
'maxwidth' => array(
'description' => __( 'The maximum width of the embed frame in pixels.' ),
'type' => 'integer',
'default' => $maxwidth,
'sanitize_callback' => 'absint',
),
'maxheight' => array(
'description' => __( 'The maximum height of the embed frame in pixels.' ),
'type' => 'integer',
'sanitize_callback' => 'absint',
),
'discover' => array(
'description' => __( 'Whether to perform an oEmbed discovery request for non-whitelisted providers.' ),
'type' => 'boolean',
'default' => true,
),
),
),
)
);
}
/**
* Callback for the embed API endpoint.
*
* Returns the JSON object for the post.
*
* @since 4.4.0
*
* @param WP_REST_Request $request Full data about the request.
* @return WP_Error|array oEmbed response data or WP_Error on failure.
*/
public function get_item( $request ) {
$post_id = url_to_postid( $request['url'] );
/**
* Filters the determined post ID.
*
* @since 4.4.0
*
* @param int $post_id The post ID.
* @param string $url The requested URL.
*/
$post_id = apply_filters( 'oembed_request_post_id', $post_id, $request['url'] );
$data = get_oembed_response_data( $post_id, $request['maxwidth'] );
if ( ! $data ) {
return new WP_Error( 'oembed_invalid_url', get_status_header_desc( 404 ), array( 'status' => 404 ) );
}
return $data;
}
/**
* Checks if current user can make a proxy oEmbed request.
*
* @since 4.8.0
*
* @return true|WP_Error True if the request has read access, WP_Error object otherwise.
*/
public function get_proxy_item_permissions_check() {
if ( ! current_user_can( 'edit_posts' ) ) {
return new WP_Error( 'rest_forbidden', __( 'Sorry, you are not allowed to make proxied oEmbed requests.' ), array( 'status' => rest_authorization_required_code() ) );
}
return true;
}
/**
* Callback for the proxy API endpoint.
*
* Returns the JSON object for the proxied item.
*
* @since 4.8.0
*
* @see WP_oEmbed::get_html()
* @param WP_REST_Request $request Full data about the request.
* @return object|WP_Error oEmbed response data or WP_Error on failure.
*/
public function get_proxy_item( $request ) {
$args = $request->get_params();
// Serve oEmbed data from cache if set.
unset( $args['_wpnonce'] );
$cache_key = 'oembed_' . md5( serialize( $args ) );
$data = get_transient( $cache_key );
if ( ! empty( $data ) ) {
return $data;
}
$url = $request['url'];
unset( $args['url'] );
// Copy maxwidth/maxheight to width/height since WP_oEmbed::fetch() uses these arg names.
if ( isset( $args['maxwidth'] ) ) {
$args['width'] = $args['maxwidth'];
}
if ( isset( $args['maxheight'] ) ) {
$args['height'] = $args['maxheight'];
}
// Short-circuit process for URLs belonging to the current site.
$data = get_oembed_response_data_for_url( $url, $args );
if ( $data ) {
return $data;
}
$data = _wp_oembed_get_object()->get_data( $url, $args );
if ( false === $data ) {
return new WP_Error( 'oembed_invalid_url', get_status_header_desc( 404 ), array( 'status' => 404 ) );
}
/** This filter is documented in wp-includes/class-oembed.php */
$data->html = apply_filters( 'oembed_result', _wp_oembed_get_object()->data2html( (object) $data, $url ), $url, $args );
/**
* Filters the oEmbed TTL value (time to live).
*
* Similar to the {@see 'oembed_ttl'} filter, but for the REST API
* oEmbed proxy endpoint.
*
* @since 4.8.0
*
* @param int $time Time to live (in seconds).
* @param string $url The attempted embed URL.
* @param array $args An array of embed request arguments.
*/
$ttl = apply_filters( 'rest_oembed_ttl', DAY_IN_SECONDS, $url, $args );
set_transient( $cache_key, $data, $ttl );
return $data;
}
}
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