2019-07-19 00:32:57 -04:00
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<?php
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/**
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* API for fetching the HTML to embed remote content based on a provided URL
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*
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* Used internally by the WP_Embed class, but is designed to be generic.
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*
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2019-07-25 18:45:57 -04:00
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* @link https://wordpress.org/support/article/embeds/
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* @link http://oembed.com/
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2019-07-19 00:32:57 -04:00
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*
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* @package WordPress
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* @subpackage oEmbed
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*/
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/**
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* Core class used to implement oEmbed functionality.
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*
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* @since 2.9.0
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*/
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class WP_oEmbed {
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/**
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* A list of oEmbed providers.
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*
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* @since 2.9.0
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* @var array
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*/
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public $providers = array();
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/**
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* A list of an early oEmbed providers.
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*
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* @since 4.0.0
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* @var array
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*/
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public static $early_providers = array();
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/**
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* A list of private/protected methods, used for backward compatibility.
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*
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* @since 4.2.0
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* @var array
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*/
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private $compat_methods = array( '_fetch_with_format', '_parse_json', '_parse_xml', '_parse_xml_body' );
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/**
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* Constructor.
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*
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* @since 2.9.0
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*/
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public function __construct() {
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$host = urlencode( home_url() );
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$providers = array(
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'#https?://((m|www)\.)?youtube\.com/watch.*#i' => array( 'https://www.youtube.com/oembed', true ),
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'#https?://((m|www)\.)?youtube\.com/playlist.*#i' => array( 'https://www.youtube.com/oembed', true ),
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'#https?://youtu\.be/.*#i' => array( 'https://www.youtube.com/oembed', true ),
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'#https?://(.+\.)?vimeo\.com/.*#i' => array( 'https://vimeo.com/api/oembed.{format}', true ),
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'#https?://(www\.)?dailymotion\.com/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ),
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'#https?://dai\.ly/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ),
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'#https?://(www\.)?flickr\.com/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ),
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'#https?://flic\.kr/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ),
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'#https?://(.+\.)?smugmug\.com/.*#i' => array( 'https://api.smugmug.com/services/oembed/', true ),
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'#https?://(www\.)?hulu\.com/watch/.*#i' => array( 'https://www.hulu.com/api/oembed.{format}', true ),
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'#https?://(www\.)?scribd\.com/(doc|document)/.*#i' => array( 'https://www.scribd.com/services/oembed', true ),
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'#https?://wordpress\.tv/.*#i' => array( 'https://wordpress.tv/oembed/', true ),
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'#https?://(.+\.)?polldaddy\.com/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ),
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'#https?://poll\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ),
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'#https?://(.+\.)?survey\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ),
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'#https?://(www\.)?twitter\.com/\w{1,15}/status(es)?/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
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'#https?://(www\.)?twitter\.com/\w{1,15}$#i' => array( 'https://publish.twitter.com/oembed', true ),
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'#https?://(www\.)?twitter\.com/\w{1,15}/likes$#i' => array( 'https://publish.twitter.com/oembed', true ),
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'#https?://(www\.)?twitter\.com/\w{1,15}/lists/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
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'#https?://(www\.)?twitter\.com/\w{1,15}/timelines/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
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'#https?://(www\.)?twitter\.com/i/moments/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
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'#https?://(www\.)?soundcloud\.com/.*#i' => array( 'https://soundcloud.com/oembed', true ),
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'#https?://(.+?\.)?slideshare\.net/.*#i' => array( 'https://www.slideshare.net/api/oembed/2', true ),
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'#https?://(www\.)?instagr(\.am|am\.com)/(p|tv)/.*#i' => array( 'https://api.instagram.com/oembed', true ),
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'#https?://(open|play)\.spotify\.com/.*#i' => array( 'https://embed.spotify.com/oembed/', true ),
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'#https?://(.+\.)?imgur\.com/.*#i' => array( 'https://api.imgur.com/oembed', true ),
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'#https?://(www\.)?meetu(\.ps|p\.com)/.*#i' => array( 'https://api.meetup.com/oembed', true ),
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'#https?://(www\.)?issuu\.com/.+/docs/.+#i' => array( 'https://issuu.com/oembed_wp', true ),
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'#https?://(www\.)?collegehumor\.com/video/.*#i' => array( 'https://www.collegehumor.com/oembed.{format}', true ),
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'#https?://(www\.)?mixcloud\.com/.*#i' => array( 'https://www.mixcloud.com/oembed', true ),
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'#https?://(www\.|embed\.)?ted\.com/talks/.*#i' => array( 'https://www.ted.com/services/v1/oembed.{format}', true ),
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'#https?://(www\.)?(animoto|video214)\.com/play/.*#i' => array( 'https://animoto.com/oembeds/create', true ),
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'#https?://(.+)\.tumblr\.com/post/.*#i' => array( 'https://www.tumblr.com/oembed/1.0', true ),
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'#https?://(www\.)?kickstarter\.com/projects/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ),
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'#https?://kck\.st/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ),
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'#https?://cloudup\.com/.*#i' => array( 'https://cloudup.com/oembed', true ),
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'#https?://(www\.)?reverbnation\.com/.*#i' => array( 'https://www.reverbnation.com/oembed', true ),
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'#https?://videopress\.com/v/.*#' => array( 'https://public-api.wordpress.com/oembed/?for=' . $host, true ),
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'#https?://(www\.)?reddit\.com/r/[^/]+/comments/.*#i' => array( 'https://www.reddit.com/oembed', true ),
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'#https?://(www\.)?speakerdeck\.com/.*#i' => array( 'https://speakerdeck.com/oembed.{format}', true ),
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'#https?://www\.facebook\.com/.*/posts/.*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/.*/activity/.*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/.*/photos/.*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/photo(s/|\.php).*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/permalink\.php.*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/media/.*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/questions/.*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/notes/.*#i' => array( 'https://www.facebook.com/plugins/post/oembed.json/', true ),
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'#https?://www\.facebook\.com/.*/videos/.*#i' => array( 'https://www.facebook.com/plugins/video/oembed.json/', true ),
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'#https?://www\.facebook\.com/video\.php.*#i' => array( 'https://www.facebook.com/plugins/video/oembed.json/', true ),
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'#https?://(www\.)?screencast\.com/.*#i' => array( 'https://api.screencast.com/external/oembed', true ),
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'#https?://([a-z0-9-]+\.)?amazon\.(com|com\.mx|com\.br|ca)/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ),
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'#https?://([a-z0-9-]+\.)?amazon\.(co\.uk|de|fr|it|es|in|nl|ru)/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ),
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'#https?://([a-z0-9-]+\.)?amazon\.(co\.jp|com\.au)/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ),
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'#https?://([a-z0-9-]+\.)?amazon\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ),
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'#https?://(www\.)?a\.co/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ),
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'#https?://(www\.)?amzn\.to/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ),
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'#https?://(www\.)?amzn\.eu/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ),
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'#https?://(www\.)?amzn\.in/.*#i' => array( 'https://read.amazon.in/kp/api/oembed', true ),
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'#https?://(www\.)?amzn\.asia/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ),
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'#https?://(www\.)?z\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ),
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'#https?://www\.someecards\.com/.+-cards/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
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'#https?://www\.someecards\.com/usercards/viewcard/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
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'#https?://some\.ly\/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
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);
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if ( ! empty( self::$early_providers['add'] ) ) {
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foreach ( self::$early_providers['add'] as $format => $data ) {
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$providers[ $format ] = $data;
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}
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}
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if ( ! empty( self::$early_providers['remove'] ) ) {
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foreach ( self::$early_providers['remove'] as $format ) {
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unset( $providers[ $format ] );
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}
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}
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self::$early_providers = array();
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/**
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* Filters the list of whitelisted oEmbed providers.
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*
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* Since WordPress 4.4, oEmbed discovery is enabled for all users and allows embedding of sanitized
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* iframes. The providers in this list are whitelisted, meaning they are trusted and allowed to
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* embed any content, such as iframes, videos, JavaScript, and arbitrary HTML.
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*
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* Supported providers:
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*
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* | Provider | Flavor | Since |
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* | ------------ | ----------------------------------------- | ------- |
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* | Dailymotion | dailymotion.com | 2.9.0 |
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* | Flickr | flickr.com | 2.9.0 |
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* | Hulu | hulu.com | 2.9.0 |
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* | Scribd | scribd.com | 2.9.0 |
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* | Vimeo | vimeo.com | 2.9.0 |
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* | WordPress.tv | wordpress.tv | 2.9.0 |
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* | YouTube | youtube.com/watch | 2.9.0 |
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* | Crowdsignal | polldaddy.com | 3.0.0 |
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* | SmugMug | smugmug.com | 3.0.0 |
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* | YouTube | youtu.be | 3.0.0 |
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* | Twitter | twitter.com | 3.4.0 |
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* | Instagram | instagram.com | 3.5.0 |
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* | Instagram | instagr.am | 3.5.0 |
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* | Slideshare | slideshare.net | 3.5.0 |
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* | SoundCloud | soundcloud.com | 3.5.0 |
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* | Dailymotion | dai.ly | 3.6.0 |
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* | Flickr | flic.kr | 3.6.0 |
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* | Spotify | spotify.com | 3.6.0 |
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* | Imgur | imgur.com | 3.9.0 |
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* | Meetup.com | meetup.com | 3.9.0 |
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* | Meetup.com | meetu.ps | 3.9.0 |
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* | Animoto | animoto.com | 4.0.0 |
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* | Animoto | video214.com | 4.0.0 |
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* | CollegeHumor | collegehumor.com | 4.0.0 |
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* | Issuu | issuu.com | 4.0.0 |
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* | Mixcloud | mixcloud.com | 4.0.0 |
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* | Crowdsignal | poll.fm | 4.0.0 |
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* | TED | ted.com | 4.0.0 |
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* | YouTube | youtube.com/playlist | 4.0.0 |
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* | Tumblr | tumblr.com | 4.2.0 |
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* | Kickstarter | kickstarter.com | 4.2.0 |
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* | Kickstarter | kck.st | 4.2.0 |
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* | Cloudup | cloudup.com | 4.3.0 |
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* | ReverbNation | reverbnation.com | 4.4.0 |
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* | VideoPress | videopress.com | 4.4.0 |
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* | Reddit | reddit.com | 4.4.0 |
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* | Speaker Deck | speakerdeck.com | 4.4.0 |
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* | Twitter | twitter.com/timelines | 4.5.0 |
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* | Twitter | twitter.com/moments | 4.5.0 |
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* | Facebook | facebook.com | 4.7.0 |
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* | Twitter | twitter.com/user | 4.7.0 |
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* | Twitter | twitter.com/likes | 4.7.0 |
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* | Twitter | twitter.com/lists | 4.7.0 |
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* | Screencast | screencast.com | 4.8.0 |
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* | Amazon | amazon.com (com.mx, com.br, ca) | 4.9.0 |
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* | Amazon | amazon.de (fr, it, es, in, nl, ru, co.uk) | 4.9.0 |
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* | Amazon | amazon.co.jp (com.au) | 4.9.0 |
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* | Amazon | amazon.cn | 4.9.0 |
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* | Amazon | a.co | 4.9.0 |
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* | Amazon | amzn.to (eu, in, asia) | 4.9.0 |
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* | Amazon | z.cn | 4.9.0 |
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* | Someecards | someecards.com | 4.9.0 |
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* | Someecards | some.ly | 4.9.0 |
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* | Crowdsignal | survey.fm | 5.1.0 |
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* | Instagram TV | instagram.com | 5.1.0 |
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* | Instagram TV | instagr.am | 5.1.0 |
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*
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* No longer supported providers:
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*
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* | Provider | Flavor | Since | Removed |
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* | ------------ | -------------------- | --------- | --------- |
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* | Qik | qik.com | 2.9.0 | 3.9.0 |
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* | Viddler | viddler.com | 2.9.0 | 4.0.0 |
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* | Revision3 | revision3.com | 2.9.0 | 4.2.0 |
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* | Blip | blip.tv | 2.9.0 | 4.4.0 |
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* | Rdio | rdio.com | 3.6.0 | 4.4.1 |
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* | Rdio | rd.io | 3.6.0 | 4.4.1 |
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* | Vine | vine.co | 4.1.0 | 4.9.0 |
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* | Photobucket | photobucket.com | 2.9.0 | 5.1.0 |
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* | Funny or Die | funnyordie.com | 3.0.0 | 5.1.0 |
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*
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* @see wp_oembed_add_provider()
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*
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* @since 2.9.0
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*
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* @param array[] $providers An array of arrays containing data about popular oEmbed providers.
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*/
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|
$this->providers = apply_filters( 'oembed_providers', $providers );
|
|
|
|
|
|
|
|
|
|
// Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop().
|
|
|
|
|
add_filter( 'oembed_dataparse', array( $this, '_strip_newlines' ), 10, 3 );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Exposes private/protected methods for backward compatibility.
|
|
|
|
|
*
|
|
|
|
|
* @since 4.0.0
|
|
|
|
|
*
|
|
|
|
|
* @param string $name Method to call.
|
|
|
|
|
* @param array $arguments Arguments to pass when calling.
|
|
|
|
|
* @return mixed|bool Return value of the callback, false otherwise.
|
|
|
|
|
*/
|
|
|
|
|
public function __call( $name, $arguments ) {
|
|
|
|
|
if ( in_array( $name, $this->compat_methods ) ) {
|
2019-09-15 07:53:56 -04:00
|
|
|
return $this->$name( ...$arguments );
|
2019-07-19 00:32:57 -04:00
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Takes a URL and returns the corresponding oEmbed provider's URL, if there is one.
|
|
|
|
|
*
|
|
|
|
|
* @since 4.0.0
|
|
|
|
|
*
|
|
|
|
|
* @see WP_oEmbed::discover()
|
|
|
|
|
*
|
|
|
|
|
* @param string $url The URL to the content.
|
|
|
|
|
* @param string|array $args Optional provider arguments.
|
|
|
|
|
* @return false|string False on failure, otherwise the oEmbed provider URL.
|
|
|
|
|
*/
|
|
|
|
|
public function get_provider( $url, $args = '' ) {
|
|
|
|
|
$args = wp_parse_args( $args );
|
|
|
|
|
|
|
|
|
|
$provider = false;
|
|
|
|
|
|
|
|
|
|
if ( ! isset( $args['discover'] ) ) {
|
|
|
|
|
$args['discover'] = true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
foreach ( $this->providers as $matchmask => $data ) {
|
|
|
|
|
list( $providerurl, $regex ) = $data;
|
|
|
|
|
|
|
|
|
|
// Turn the asterisk-type provider URLs into regex
|
|
|
|
|
if ( ! $regex ) {
|
|
|
|
|
$matchmask = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $matchmask ), '#' ) ) . '#i';
|
|
|
|
|
$matchmask = preg_replace( '|^#http\\\://|', '#https?\://', $matchmask );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if ( preg_match( $matchmask, $url ) ) {
|
|
|
|
|
$provider = str_replace( '{format}', 'json', $providerurl ); // JSON is easier to deal with than XML
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if ( ! $provider && $args['discover'] ) {
|
|
|
|
|
$provider = $this->discover( $url );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return $provider;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Adds an oEmbed provider.
|
|
|
|
|
*
|
|
|
|
|
* The provider is added just-in-time when wp_oembed_add_provider() is called before
|
|
|
|
|
* the {@see 'plugins_loaded'} hook.
|
|
|
|
|
*
|
|
|
|
|
* The just-in-time addition is for the benefit of the {@see 'oembed_providers'} filter.
|
|
|
|
|
*
|
|
|
|
|
* @since 4.0.0
|
|
|
|
|
*
|
|
|
|
|
* @see wp_oembed_add_provider()
|
|
|
|
|
*
|
|
|
|
|
* @param string $format Format of URL that this provider can handle. You can use
|
|
|
|
|
* asterisks as wildcards.
|
|
|
|
|
* @param string $provider The URL to the oEmbed provider..
|
|
|
|
|
* @param bool $regex Optional. Whether the $format parameter is in a regex format.
|
|
|
|
|
* Default false.
|
|
|
|
|
*/
|
|
|
|
|
public static function _add_provider_early( $format, $provider, $regex = false ) {
|
|
|
|
|
if ( empty( self::$early_providers['add'] ) ) {
|
|
|
|
|
self::$early_providers['add'] = array();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
self::$early_providers['add'][ $format ] = array( $provider, $regex );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Removes an oEmbed provider.
|
|
|
|
|
*
|
|
|
|
|
* The provider is removed just-in-time when wp_oembed_remove_provider() is called before
|
|
|
|
|
* the {@see 'plugins_loaded'} hook.
|
|
|
|
|
*
|
|
|
|
|
* The just-in-time removal is for the benefit of the {@see 'oembed_providers'} filter.
|
|
|
|
|
*
|
|
|
|
|
* @since 4.0.0
|
|
|
|
|
*
|
|
|
|
|
* @see wp_oembed_remove_provider()
|
|
|
|
|
*
|
|
|
|
|
* @param string $format The format of URL that this provider can handle. You can use
|
|
|
|
|
* asterisks as wildcards.
|
|
|
|
|
*/
|
|
|
|
|
public static function _remove_provider_early( $format ) {
|
|
|
|
|
if ( empty( self::$early_providers['remove'] ) ) {
|
|
|
|
|
self::$early_providers['remove'] = array();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
self::$early_providers['remove'][] = $format;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Takes a URL and attempts to return the oEmbed data.
|
|
|
|
|
*
|
|
|
|
|
* @see WP_oEmbed::fetch()
|
|
|
|
|
*
|
|
|
|
|
* @since 4.8.0
|
|
|
|
|
*
|
|
|
|
|
* @param string $url The URL to the content that should be attempted to be embedded.
|
|
|
|
|
* @param array|string $args Optional. Arguments, usually passed from a shortcode. Default empty.
|
|
|
|
|
* @return false|object False on failure, otherwise the result in the form of an object.
|
|
|
|
|
*/
|
|
|
|
|
public function get_data( $url, $args = '' ) {
|
|
|
|
|
$args = wp_parse_args( $args );
|
|
|
|
|
|
|
|
|
|
$provider = $this->get_provider( $url, $args );
|
|
|
|
|
|
|
|
|
|
if ( ! $provider ) {
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
$data = $this->fetch( $provider, $url, $args );
|
|
|
|
|
|
|
|
|
|
if ( false === $data ) {
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return $data;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* The do-it-all function that takes a URL and attempts to return the HTML.
|
|
|
|
|
*
|
|
|
|
|
* @see WP_oEmbed::fetch()
|
|
|
|
|
* @see WP_oEmbed::data2html()
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0
|
|
|
|
|
*
|
|
|
|
|
* @param string $url The URL to the content that should be attempted to be embedded.
|
|
|
|
|
* @param array|string $args Optional. Arguments, usually passed from a shortcode. Default empty.
|
|
|
|
|
* @return false|string False on failure, otherwise the UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
|
|
|
|
|
*/
|
|
|
|
|
public function get_html( $url, $args = '' ) {
|
|
|
|
|
/**
|
|
|
|
|
* Filters the oEmbed result before any HTTP requests are made.
|
|
|
|
|
*
|
|
|
|
|
* This allows one to short-circuit the default logic, perhaps by
|
|
|
|
|
* replacing it with a routine that is more optimal for your setup.
|
|
|
|
|
*
|
|
|
|
|
* Passing a non-null value to the filter will effectively short-circuit retrieval,
|
|
|
|
|
* returning the passed value instead.
|
|
|
|
|
*
|
|
|
|
|
* @since 4.5.3
|
|
|
|
|
*
|
|
|
|
|
* @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null.
|
|
|
|
|
* @param string $url The URL to the content that should be attempted to be embedded.
|
|
|
|
|
* @param array $args Optional. Arguments, usually passed from a shortcode. Default empty.
|
|
|
|
|
*/
|
|
|
|
|
$pre = apply_filters( 'pre_oembed_result', null, $url, $args );
|
|
|
|
|
|
|
|
|
|
if ( null !== $pre ) {
|
|
|
|
|
return $pre;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
$data = $this->get_data( $url, $args );
|
|
|
|
|
|
|
|
|
|
if ( false === $data ) {
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Filters the HTML returned by the oEmbed provider.
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0
|
|
|
|
|
*
|
|
|
|
|
* @param string|false $data The returned oEmbed HTML (false if unsafe).
|
|
|
|
|
* @param string $url URL of the content to be embedded.
|
|
|
|
|
* @param array $args Optional arguments, usually passed from a shortcode.
|
|
|
|
|
*/
|
|
|
|
|
return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Attempts to discover link tags at the given URL for an oEmbed provider.
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0
|
|
|
|
|
*
|
|
|
|
|
* @param string $url The URL that should be inspected for discovery `<link>` tags.
|
|
|
|
|
* @return false|string False on failure, otherwise the oEmbed provider URL.
|
|
|
|
|
*/
|
|
|
|
|
public function discover( $url ) {
|
|
|
|
|
$providers = array();
|
|
|
|
|
$args = array(
|
|
|
|
|
'limit_response_size' => 153600, // 150 KB
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Filters oEmbed remote get arguments.
|
|
|
|
|
*
|
|
|
|
|
* @since 4.0.0
|
|
|
|
|
*
|
|
|
|
|
* @see WP_Http::request()
|
|
|
|
|
*
|
|
|
|
|
* @param array $args oEmbed remote get arguments.
|
|
|
|
|
* @param string $url URL to be inspected.
|
|
|
|
|
*/
|
|
|
|
|
$args = apply_filters( 'oembed_remote_get_args', $args, $url );
|
|
|
|
|
|
|
|
|
|
// Fetch URL content
|
|
|
|
|
$request = wp_safe_remote_get( $url, $args );
|
|
|
|
|
$html = wp_remote_retrieve_body( $request );
|
|
|
|
|
if ( $html ) {
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Filters the link types that contain oEmbed provider URLs.
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0
|
|
|
|
|
*
|
|
|
|
|
* @param string[] $format Array of oEmbed link types. Accepts 'application/json+oembed',
|
|
|
|
|
* 'text/xml+oembed', and 'application/xml+oembed' (incorrect,
|
|
|
|
|
* used by at least Vimeo).
|
|
|
|
|
*/
|
|
|
|
|
$linktypes = apply_filters(
|
|
|
|
|
'oembed_linktypes',
|
|
|
|
|
array(
|
|
|
|
|
'application/json+oembed' => 'json',
|
|
|
|
|
'text/xml+oembed' => 'xml',
|
|
|
|
|
'application/xml+oembed' => 'xml',
|
|
|
|
|
)
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
// Strip <body>
|
|
|
|
|
$html_head_end = stripos( $html, '</head>' );
|
|
|
|
|
if ( $html_head_end ) {
|
|
|
|
|
$html = substr( $html, 0, $html_head_end );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Do a quick check
|
|
|
|
|
$tagfound = false;
|
|
|
|
|
foreach ( $linktypes as $linktype => $format ) {
|
|
|
|
|
if ( stripos( $html, $linktype ) ) {
|
|
|
|
|
$tagfound = true;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if ( $tagfound && preg_match_all( '#<link([^<>]+)/?>#iU', $html, $links ) ) {
|
|
|
|
|
foreach ( $links[1] as $link ) {
|
|
|
|
|
$atts = shortcode_parse_atts( $link );
|
|
|
|
|
|
|
|
|
|
if ( ! empty( $atts['type'] ) && ! empty( $linktypes[ $atts['type'] ] ) && ! empty( $atts['href'] ) ) {
|
|
|
|
|
$providers[ $linktypes[ $atts['type'] ] ] = htmlspecialchars_decode( $atts['href'] );
|
|
|
|
|
|
|
|
|
|
// Stop here if it's JSON (that's all we need)
|
|
|
|
|
if ( 'json' == $linktypes[ $atts['type'] ] ) {
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// JSON is preferred to XML
|
|
|
|
|
if ( ! empty( $providers['json'] ) ) {
|
|
|
|
|
return $providers['json'];
|
|
|
|
|
} elseif ( ! empty( $providers['xml'] ) ) {
|
|
|
|
|
return $providers['xml'];
|
|
|
|
|
} else {
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Connects to a oEmbed provider and returns the result.
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0
|
|
|
|
|
*
|
|
|
|
|
* @param string $provider The URL to the oEmbed provider.
|
|
|
|
|
* @param string $url The URL to the content that is desired to be embedded.
|
|
|
|
|
* @param array|string $args Optional. Arguments, usually passed from a shortcode. Default empty.
|
|
|
|
|
* @return false|object False on failure, otherwise the result in the form of an object.
|
|
|
|
|
*/
|
|
|
|
|
public function fetch( $provider, $url, $args = '' ) {
|
|
|
|
|
$args = wp_parse_args( $args, wp_embed_defaults( $url ) );
|
|
|
|
|
|
|
|
|
|
$provider = add_query_arg( 'maxwidth', (int) $args['width'], $provider );
|
|
|
|
|
$provider = add_query_arg( 'maxheight', (int) $args['height'], $provider );
|
|
|
|
|
$provider = add_query_arg( 'url', urlencode( $url ), $provider );
|
|
|
|
|
$provider = add_query_arg( 'dnt', 1, $provider );
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Filters the oEmbed URL to be fetched.
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0
|
|
|
|
|
* @since 4.9.0 The `dnt` (Do Not Track) query parameter was added to all oEmbed provider URLs.
|
|
|
|
|
*
|
|
|
|
|
* @param string $provider URL of the oEmbed provider.
|
|
|
|
|
* @param string $url URL of the content to be embedded.
|
|
|
|
|
* @param array $args Optional arguments, usually passed from a shortcode.
|
|
|
|
|
*/
|
|
|
|
|
$provider = apply_filters( 'oembed_fetch_url', $provider, $url, $args );
|
|
|
|
|
|
|
|
|
|
foreach ( array( 'json', 'xml' ) as $format ) {
|
|
|
|
|
$result = $this->_fetch_with_format( $provider, $format );
|
|
|
|
|
if ( is_wp_error( $result ) && 'not-implemented' == $result->get_error_code() ) {
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
return ( $result && ! is_wp_error( $result ) ) ? $result : false;
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Fetches result from an oEmbed provider for a specific format and complete provider URL
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*
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* @since 3.0.0
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*
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* @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.)
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* @param string $format Format to use
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* @return false|object|WP_Error False on failure, otherwise the result in the form of an object.
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*/
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private function _fetch_with_format( $provider_url_with_args, $format ) {
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$provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args );
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/** This filter is documented in wp-includes/class-wp-oembed.php */
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$args = apply_filters( 'oembed_remote_get_args', array(), $provider_url_with_args );
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$response = wp_safe_remote_get( $provider_url_with_args, $args );
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if ( 501 == wp_remote_retrieve_response_code( $response ) ) {
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return new WP_Error( 'not-implemented' );
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}
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$body = wp_remote_retrieve_body( $response );
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if ( ! $body ) {
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return false;
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}
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$parse_method = "_parse_$format";
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return $this->$parse_method( $body );
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}
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/**
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* Parses a json response body.
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*
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* @since 3.0.0
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*
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* @param string $response_body
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* @return object|false
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*/
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private function _parse_json( $response_body ) {
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$data = json_decode( trim( $response_body ) );
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return ( $data && is_object( $data ) ) ? $data : false;
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}
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/**
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* Parses an XML response body.
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*
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* @since 3.0.0
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*
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* @param string $response_body
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* @return object|false
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*/
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private function _parse_xml( $response_body ) {
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if ( ! function_exists( 'libxml_disable_entity_loader' ) ) {
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return false;
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}
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$loader = libxml_disable_entity_loader( true );
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$errors = libxml_use_internal_errors( true );
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$return = $this->_parse_xml_body( $response_body );
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libxml_use_internal_errors( $errors );
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libxml_disable_entity_loader( $loader );
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return $return;
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}
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/**
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* Serves as a helper function for parsing an XML response body.
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*
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* @since 3.6.0
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*
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* @param string $response_body
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* @return stdClass|false
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*/
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private function _parse_xml_body( $response_body ) {
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if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument', false ) ) {
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return false;
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}
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$dom = new DOMDocument;
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$success = $dom->loadXML( $response_body );
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if ( ! $success ) {
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return false;
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}
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if ( isset( $dom->doctype ) ) {
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return false;
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}
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foreach ( $dom->childNodes as $child ) {
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if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType ) {
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return false;
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}
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}
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$xml = simplexml_import_dom( $dom );
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if ( ! $xml ) {
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return false;
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}
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$return = new stdClass;
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foreach ( $xml as $key => $value ) {
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$return->$key = (string) $value;
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}
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return $return;
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}
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/**
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* Converts a data object from WP_oEmbed::fetch() and returns the HTML.
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*
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* @since 2.9.0
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*
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* @param object $data A data object result from an oEmbed provider.
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* @param string $url The URL to the content that is desired to be embedded.
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* @return false|string False on error, otherwise the HTML needed to embed.
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*/
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public function data2html( $data, $url ) {
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if ( ! is_object( $data ) || empty( $data->type ) ) {
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return false;
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}
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$return = false;
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switch ( $data->type ) {
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case 'photo':
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if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) ) {
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break;
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}
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if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) ) {
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break;
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}
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$title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : '';
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$return = '<a href="' . esc_url( $url ) . '"><img src="' . esc_url( $data->url ) . '" alt="' . esc_attr( $title ) . '" width="' . esc_attr( $data->width ) . '" height="' . esc_attr( $data->height ) . '" /></a>';
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break;
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case 'video':
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case 'rich':
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if ( ! empty( $data->html ) && is_string( $data->html ) ) {
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$return = $data->html;
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}
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break;
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case 'link':
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|
if ( ! empty( $data->title ) && is_string( $data->title ) ) {
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|
$return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>';
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}
|
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|
|
break;
|
|
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|
|
default:
|
|
|
|
|
$return = false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Filters the returned oEmbed HTML.
|
|
|
|
|
*
|
|
|
|
|
* Use this filter to add support for custom data types, or to filter the result.
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0
|
|
|
|
|
*
|
|
|
|
|
* @param string $return The returned oEmbed HTML.
|
|
|
|
|
* @param object $data A data object result from an oEmbed provider.
|
|
|
|
|
* @param string $url The URL of the content to be embedded.
|
|
|
|
|
*/
|
|
|
|
|
return apply_filters( 'oembed_dataparse', $return, $data, $url );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Strips any new lines from the HTML.
|
|
|
|
|
*
|
|
|
|
|
* @since 2.9.0 as strip_scribd_newlines()
|
|
|
|
|
* @since 3.0.0
|
|
|
|
|
*
|
|
|
|
|
* @param string $html Existing HTML.
|
|
|
|
|
* @param object $data Data object from WP_oEmbed::data2html()
|
|
|
|
|
* @param string $url The original URL passed to oEmbed.
|
|
|
|
|
* @return string Possibly modified $html
|
|
|
|
|
*/
|
|
|
|
|
public function _strip_newlines( $html, $data, $url ) {
|
|
|
|
|
if ( false === strpos( $html, "\n" ) ) {
|
|
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|
|
return $html;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
$count = 1;
|
|
|
|
|
$found = array();
|
|
|
|
|
$token = '__PRE__';
|
|
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|
|
$search = array( "\t", "\n", "\r", ' ' );
|
|
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|
|
$replace = array( '__TAB__', '__NL__', '__CR__', '__SPACE__' );
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|
|
$tokenized = str_replace( $search, $replace, $html );
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|
|
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|
preg_match_all( '#(<pre[^>]*>.+?</pre>)#i', $tokenized, $matches, PREG_SET_ORDER );
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|
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|
|
foreach ( $matches as $i => $match ) {
|
|
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|
|
$tag_html = str_replace( $replace, $search, $match[0] );
|
|
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|
|
$tag_token = $token . $i;
|
|
|
|
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|
|
$found[ $tag_token ] = $tag_html;
|
|
|
|
|
$html = str_replace( $tag_html, $tag_token, $html, $count );
|
|
|
|
|
}
|
|
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|
|
$replaced = str_replace( $replace, $search, $html );
|
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|
$stripped = str_replace( array( "\r\n", "\n" ), '', $replaced );
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|
$pre = array_values( $found );
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|
$tokens = array_keys( $found );
|
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|
|
return str_replace( $tokens, $pre, $stripped );
|
|
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|
|
}
|
|
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|
|
}
|
