160 lines
3.6 KiB
PHP
160 lines
3.6 KiB
PHP
<?php
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/**
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* WP_oEmbed_Controller class, used to provide an oEmbed endpoint.
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*
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* @package WordPress
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* @subpackage Embeds
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* @since 4.4.0
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*/
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/**
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* oEmbed API endpoint controller.
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*
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* Parses the oEmbed API requests and delivers
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* XML and JSON responses.
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*
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* @since 4.4.0
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*/
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final class WP_oEmbed_Controller {
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/**
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* Hook into the query parsing to detect oEmbed requests.
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*
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* If an oEmbed request is made, trigger the output.
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*
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* @since 4.4.0
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*
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* @param WP_Query $wp_query The WP_Query instance (passed by reference).
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*/
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public function parse_query( $wp_query ) {
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if ( false === $wp_query->get( 'oembed', false ) ) {
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return;
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}
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if ( false === $wp_query->get( 'url', false ) ) {
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status_header( 400 );
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echo 'URL parameter missing';
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exit;
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}
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$url = esc_url_raw( get_query_var( 'url' ) );
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$format = wp_oembed_ensure_format( get_query_var( 'format' ) );
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/**
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* Filter the maxwidth oEmbed parameter.
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*
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* @since 4.4.0
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*
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* @param int $maxwidth Maximum allowed width. Default 600.
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*/
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$maxwidth = apply_filters( 'oembed_default_width', 600 );
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$maxwidth = absint( get_query_var( 'maxwidth', $maxwidth ) );
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$callback = get_query_var( '_jsonp', false );
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$request = array(
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'url' => $url,
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'format' => $format,
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'maxwidth' => $maxwidth,
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'callback' => $callback,
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);
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echo $this->dispatch( $request );
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exit;
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}
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/**
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* Handle the whole request and print the response.
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*
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* @since 4.4.0
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*
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* @param array $request The request arguments.
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* @return string The oEmbed API response.
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*/
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public function dispatch( $request ) {
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$post_id = url_to_postid( $request['url'] );
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/**
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* Filter the determined post id.
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*
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* @since 4.4.0
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*
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* @param int $post_id The post ID.
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* @param string $url The requestd URL.
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*/
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$post_id = apply_filters( 'oembed_request_post_id', $post_id, $request['url'] );
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$data = get_oembed_response_data( $post_id, $request['maxwidth'] );
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if ( false === $data ) {
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status_header( 404 );
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return __( 'Invalid URL.' );
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}
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if ( 'json' === $request['format'] ) {
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return $this->json_response( $data, $request );
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}
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return $this->xml_response( $data );
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}
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/**
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* Print the oEmbed JSON response.
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*
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* @since 4.4.0
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*
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* @param array $data The oEmbed response data.
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* @param array $request The request arguments.
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* @return string The JSON response data.
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*/
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public function json_response( $data, $request ) {
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if ( ! is_string( $request['callback'] ) || preg_match( '/[^\w\.]/', $request['callback'] ) ) {
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$request['callback'] = false;
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}
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$result = wp_json_encode( $data );
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// Bail if the result couldn't be JSON encoded.
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if ( ! $result || ! is_array( $data ) || empty( $data ) ) {
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status_header( 501 );
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return 'Not implemented';
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}
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if ( ! headers_sent() ) {
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$content_type = $request['callback'] ? 'application/javascript' : 'application/json';
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header( 'Content-Type: ' . $content_type . '; charset=' . get_option( 'blog_charset' ) );
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header( 'X-Content-Type-Options: nosniff' );
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}
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if ( $request['callback'] ) {
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return '/**/' . $request['callback'] . '(' . $result . ')';
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}
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return $result;
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}
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/**
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* Print the oEmbed XML response.
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*
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* @since 4.4.0
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*
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* @param array $data The oEmbed response data.
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* @return string The XML response data.
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*/
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public function xml_response( $data ) {
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$result = _oembed_create_xml( $data );
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// Bail if there's no XML.
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if ( ! $result ) {
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status_header( 501 );
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return 'Not implemented';
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}
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if ( ! headers_sent() ) {
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header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) );
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}
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return $result;
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}
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}
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