✏️ 编辑：class-wp-oembed.php
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<?php /** * API for fetching the HTML to embed remote content based on a provided URL * * Used internally by the WP_Embed class, but is designed to be generic. * * @link https://developer.wordpress.org/advanced-administration/wordpress/oembed/ * @link http://oembed.com/ * * @package WordPress * @subpackage oEmbed */ /** * Core class used to implement oEmbed functionality. * * @since 2.9.0 */ #[AllowDynamicProperties] class WP_oEmbed { /** * A list of oEmbed providers. * * @since 2.9.0 * @var array<string, array{ 0: string, 1: bool }> An associative array mapping URL patterns to provider data. * Each entry's value is an array with the provider endpoint URL * string at index 0 and a boolean at index 1 indicating whether * the URL pattern (array key) is a regular expression. */ public $providers = array(); /** * A list of an early oEmbed providers. * * @since 4.0.0 * @var array */ public static $early_providers = array(); /** * A list of private/protected methods, used for backward compatibility. * * @since 4.2.0 * @var array */ private $compat_methods = array( '_fetch_with_format', '_parse_json', '_parse_xml', '_parse_xml_body' ); /** * Constructor. * * @since 2.9.0 */ public function __construct() { $host = urlencode( home_url() ); $providers = array( '#https?://((m|www)\.)?youtube\.com/watch.*#i' => array( 'https://www.youtube.com/oembed', true ), '#https?://((m|www)\.)?youtube\.com/playlist.*#i' => array( 'https://www.youtube.com/oembed', true ), '#https?://((m|www)\.)?youtube\.com/shorts/*#i' => array( 'https://www.youtube.com/oembed', true ), '#https?://((m|www)\.)?youtube\.com/live/*#i' => array( 'https://www.youtube.com/oembed', true ), '#https?://youtu\.be/.*#i' => array( 'https://www.youtube.com/oembed', true ), '#https?://(.+\.)?vimeo\.com/.*#i' => array( 'https://vimeo.com/api/oembed.{format}', true ), '#https?://(www\.)?dailymotion\.com/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ), '#https?://dai\.ly/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ), '#https?://(www\.)?flickr\.com/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ), '#https?://flic\.kr/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ), '#https?://(.+\.)?smugmug\.com/.*#i' => array( 'https://api.smugmug.com/services/oembed/', true ), '#https?://(www\.)?scribd\.com/(doc|document)/.*#i' => array( 'https://www.scribd.com/services/oembed', true ), '#https?://wordpress\.tv/.*#i' => array( 'https://wordpress.tv/oembed/', true ), '#https?://(.+\.)?crowdsignal\.net/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ), '#https?://(.+\.)?polldaddy\.com/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ), '#https?://poll\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ), '#https?://(.+\.)?survey\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ), '#https?://(www\.)?twitter\.com/\w{1,15}/status(es)?/.*#i' => array( 'https://publish.twitter.com/oembed', true ), '#https?://(www\.)?twitter\.com/\w{1,15}$#i' => array( 'https://publish.twitter.com/oembed', true ), '#https?://(www\.)?twitter\.com/\w{1,15}/likes$#i' => array( 'https://publish.twitter.com/oembed', true ), '#https?://(www\.)?twitter\.com/\w{1,15}/lists/.*#i' => array( 'https://publish.twitter.com/oembed', true ), '#https?://(www\.)?twitter\.com/\w{1,15}/timelines/.*#i' => array( 'https://publish.twitter.com/oembed', true ), '#https?://(www\.)?twitter\.com/i/moments/.*#i' => array( 'https://publish.twitter.com/oembed', true ), '#https?://(www\.)?soundcloud\.com/.*#i' => array( 'https://soundcloud.com/oembed', true ), '#https?://(open|play)\.spotify\.com/.*#i' => array( 'https://embed.spotify.com/oembed/', true ), '#https?://(www\.)?issuu\.com/.+/docs/.+#i' => array( 'https://issuu.com/oembed_wp', true ), '#https?://(www\.)?mixcloud\.com/.*#i' => array( 'https://app.mixcloud.com/oembed/', true ), '#https?://(www\.|embed\.)?ted\.com/talks/.*#i' => array( 'https://www.ted.com/services/v1/oembed.{format}', true ), '#https?://(www\.)?(animoto|video214)\.com/play/.*#i' => array( 'https://animoto.com/oembeds/create', true ), '#https?://(.+)\.tumblr\.com/.*#i' => array( 'https://www.tumblr.com/oembed/1.0', true ), '#https?://(www\.)?kickstarter\.com/projects/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ), '#https?://kck\.st/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ), '#https?://cloudup\.com/.*#i' => array( 'https://cloudup.com/oembed', true ), '#https?://((legacy|www)\.)?reverbnation\.com/.*#i' => array( 'https://legacy.reverbnation.com/oembed', true ), '#https?://videopress\.com/v/.*#' => array( 'https://public-api.wordpress.com/oembed/?for=' . $host, true ), '#https?://(www\.)?reddit\.com/r/[^/]+/comments/.*#i' => array( 'https://www.reddit.com/oembed', true ), '#https?://(www\.)?speakerdeck\.com/.*#i' => array( 'https://speakerdeck.com/oembed.{format}', true ), '#https?://([a-z0-9-]+\.)?amazon\.(com|com\.mx|com\.br|ca)/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ), '#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 ), '#https?://([a-z0-9-]+\.)?amazon\.(co\.jp|com\.au)/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ), '#https?://([a-z0-9-]+\.)?amazon\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ), '#https?://(www\.)?a\.co/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ), '#https?://(www\.)?amzn\.to/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ), '#https?://(www\.)?amzn\.eu/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ), '#https?://(www\.)?amzn\.in/.*#i' => array( 'https://read.amazon.in/kp/api/oembed', true ), '#https?://(www\.)?amzn\.asia/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ), '#https?://(www\.)?z\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ), '#https?://(www\.)?tiktok\.com/.*/video/.*#i' => array( 'https://www.tiktok.com/oembed', true ), '#https?://(www\.)?tiktok\.com/@.*#i' => array( 'https://www.tiktok.com/oembed', true ), '#https?://([a-z]{2}|www)\.pinterest\.com(\.(au|mx))?/.*#i' => array( 'https://www.pinterest.com/oembed.json', true ), '#https?://(www\.)?wolframcloud\.com/obj/.+#i' => array( 'https://www.wolframcloud.com/oembed', true ), '#https?://pca\.st/.+#i' => array( 'https://pca.st/oembed.json', true ), '#https?://((play|www)\.)?anghami\.com/.*#i' => array( 'https://api.anghami.com/rest/v1/oembed.view', true ), '#https?://bsky.app/profile/.*/post/.*#i' => array( 'https://embed.bsky.app/oembed', true ), '#https?://(www\.)?canva\.com/design/.*/view.*#i' => array( 'https://canva.com/_oembed', true ), ); if ( ! empty( self::$early_providers['add'] ) ) { foreach ( self::$early_providers['add'] as $format => $data ) { $providers[ $format ] = $data; } } if ( ! empty( self::$early_providers['remove'] ) ) { foreach ( self::$early_providers['remove'] as $format ) { unset( $providers[ $format ] ); } } self::$early_providers = array(); /** * Filters the list of sanctioned oEmbed providers. * * Since WordPress 4.4, oEmbed discovery is enabled for all users and allows embedding of sanitized * iframes. The providers in this list are sanctioned, meaning they are trusted and allowed to * embed any content, such as iframes, videos, JavaScript, and arbitrary HTML. * * Supported providers: * * | Provider | Flavor | Since | * | ------------ | ----------------------------------------- | ------- | * | Dailymotion | dailymotion.com | 2.9.0 | * | Flickr | flickr.com | 2.9.0 | * | Scribd | scribd.com | 2.9.0 | * | Vimeo | vimeo.com | 2.9.0 | * | WordPress.tv | wordpress.tv | 2.9.0 | * | YouTube | youtube.com/watch | 2.9.0 | * | Crowdsignal | polldaddy.com | 3.0.0 | * | SmugMug | smugmug.com | 3.0.0 | * | YouTube | youtu.be | 3.0.0 | * | Twitter | twitter.com | 3.4.0 | * | SoundCloud | soundcloud.com | 3.5.0 | * | Dailymotion | dai.ly | 3.6.0 | * | Flickr | flic.kr | 3.6.0 | * | Spotify | spotify.com | 3.6.0 | * | Animoto | animoto.com | 4.0.0 | * | Animoto | video214.com | 4.0.0 | * | Issuu | issuu.com | 4.0.0 | * | Mixcloud | mixcloud.com | 4.0.0 | * | Crowdsignal | poll.fm | 4.0.0 | * | TED | ted.com | 4.0.0 | * | YouTube | youtube.com/playlist | 4.0.0 | * | Tumblr | tumblr.com | 4.2.0 | * | Kickstarter | kickstarter.com | 4.2.0 | * | Kickstarter | kck.st | 4.2.0 | * | Cloudup | cloudup.com | 4.3.0 | * | ReverbNation | reverbnation.com | 4.4.0 | * | VideoPress | videopress.com | 4.4.0 | * | Reddit | reddit.com | 4.4.0 | * | Speaker Deck | speakerdeck.com | 4.4.0 | * | Twitter | twitter.com/timelines | 4.5.0 | * | Twitter | twitter.com/moments | 4.5.0 | * | Twitter | twitter.com/user | 4.7.0 | * | Twitter | twitter.com/likes | 4.7.0 | * | Twitter | twitter.com/lists | 4.7.0 | * | Screencast | screencast.com | 4.8.0 | * | Amazon | amazon.com (com.mx, com.br, ca) | 4.9.0 | * | Amazon | amazon.de (fr, it, es, in, nl, ru, co.uk) | 4.9.0 | * | Amazon | amazon.co.jp (com.au) | 4.9.0 | * | Amazon | amazon.cn | 4.9.0 | * | Amazon | a.co | 4.9.0 | * | Amazon | amzn.to (eu, in, asia) | 4.9.0 | * | Amazon | z.cn | 4.9.0 | * | Crowdsignal | survey.fm | 5.1.0 | * | TikTok | tiktok.com | 5.4.0 | * | Pinterest | pinterest.com | 5.9.0 | * | WolframCloud | wolframcloud.com | 5.9.0 | * | Pocket Casts | pocketcasts.com | 6.1.0 | * | Crowdsignal | crowdsignal.net | 6.2.0 | * | Anghami | anghami.com | 6.3.0 | * | Bluesky | bsky.app | 6.6.0 | * | Canva | canva.com | 6.8.0 | * * No longer supported providers: * * | Provider | Flavor | Since | Removed | * | ------------ | -------------------- | --------- | --------- | * | Qik | qik.com | 2.9.0 | 3.9.0 | * | Viddler | viddler.com | 2.9.0 | 4.0.0 | * | Revision3 | revision3.com | 2.9.0 | 4.2.0 | * | Blip | blip.tv | 2.9.0 | 4.4.0 | * | Rdio | rdio.com | 3.6.0 | 4.4.1 | * | Rdio | rd.io | 3.6.0 | 4.4.1 | * | Vine | vine.co | 4.1.0 | 4.9.0 | * | Photobucket | photobucket.com | 2.9.0 | 5.1.0 | * | Funny or Die | funnyordie.com | 3.0.0 | 5.1.0 | * | CollegeHumor | collegehumor.com | 4.0.0 | 5.3.1 | * | Hulu | hulu.com | 2.9.0 | 5.5.0 | * | Instagram | instagram.com | 3.5.0 | 5.5.2 | * | Instagram | instagr.am | 3.5.0 | 5.5.2 | * | Instagram TV | instagram.com | 5.1.0 | 5.5.2 | * | Instagram TV | instagr.am | 5.1.0 | 5.5.2 | * | Facebook | facebook.com | 4.7.0 | 5.5.2 | * | Meetup.com | meetup.com | 3.9.0 | 6.0.1 | * | Meetup.com | meetu.ps | 3.9.0 | 6.0.1 | * | SlideShare | slideshare.net | 3.5.0 | 6.6.0 | * | Screencast | screencast.com | 4.8.0 | 6.8.2 | * | Imgur | imgur.com | 3.9.0 | 7.1.3 | * | Someecards | someecards.com | 4.9.0 | 7.1.3 | * | Someecards | some.ly | 4.9.0 | 7.1.3 | * * @see wp_oembed_add_provider() * * @since 2.9.0 * * @param array<string, array{ 0: string, 1?: bool }> $providers An associative array mapping URL patterns to * provider data. Each value must be an array * with a provider endpoint URL string at index 0 * and an optional boolean regex flag at index 1. */ $providers = (array) apply_filters( 'oembed_providers', $providers ); foreach ( $providers as $match_mask => $data ) { $provider = $this->sanitize_provider( $match_mask, $data ); if ( null === $provider ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: oembed_providers, 2: The oEmbed provider URL pattern. */ __( 'The oEmbed provider data returned by the %1$s filter at key %2$s is malformed. The providers array must be a mapping of provider URL patterns to a tuple array consisting of a provider endpoint URL string at index 0 and an optional boolean regex flag at index 1.' ), '<code>oembed_providers</code>', '<code>' . esc_html( (string) $match_mask ) . '</code>' ), '7.1.0' ); } else { $this->providers[ $provider['match_mask'] ] = array( $provider['endpoint'], $provider['is_regex'] ); } } // 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|false Return value of the callback, false otherwise. */ public function __call( $name, $arguments ) { if ( in_array( $name, $this->compat_methods, true ) ) { return $this->$name( ...$arguments ); } return false; } /** * Sanitizes and normalizes a single oEmbed provider entry. * * Validates that the match mask is a non-empty string and that the provider data * is an array with a non-empty string endpoint URL at index 0. Normalizes the * optional regex flag at index 1 to a boolean. * * @since 7.1.0 * * @param array-key $match_mask The URL pattern used to match against URLs. * @param mixed $data The raw provider data to sanitize. * @return array{ match_mask: non-empty-string, endpoint: non-empty-string, is_regex: bool }|null Normalized provider array, or null if malformed. */ private function sanitize_provider( $match_mask, $data ): ?array { if ( is_string( $match_mask ) && '' !== $match_mask && is_array( $data ) && isset( $data[0] ) && is_string( $data[0] ) && '' !== $data[0] ) { return array( 'match_mask' => $match_mask, 'endpoint' => $data[0], 'is_regex' => (bool) ( $data[1] ?? false ), ); } return null; } /** * 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. Additional provider arguments. Default empty. * * @type bool $discover Optional. Determines whether to attempt to discover link tags * at the given URL for an oEmbed provider when the provider URL * is not found in the built-in providers list. Default true. * } * @return string|false The oEmbed provider URL on success, false on failure. */ public function get_provider( $url, $args = '' ) { $args = wp_parse_args( $args ); $provider = false; if ( ! isset( $args['discover'] ) ) { $args['discover'] = true; } foreach ( $this->providers as $match_mask => $data ) { $provider_data = $this->sanitize_provider( $match_mask, $data ); if ( null === $provider_data ) { continue; } $match_mask = $provider_data['match_mask']; // Turn the asterisk-type provider URLs into regex. if ( ! $provider_data['is_regex'] ) { $match_mask = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $match_mask ), '#' ) ) . '#i'; $match_mask = (string) preg_replace( '|^#http\\\://|', '#https?\://', $match_mask ); } if ( preg_match( $match_mask, $url ) ) { $provider = str_replace( '{format}', 'json', $provider_data['endpoint'] ); // 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 string|array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. * @return object|false The result in the form of an object on success, false on failure. */ public function get_data( $url, $args = '' ) { $args = wp_parse_args( $args ); $provider = $this->get_provider( $url, $args ); if ( ! $provider ) { return false; } return $this->fetch( $provider, $url, $args ); } /** * 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 string|array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. * @return string|false The UNSANITIZED (and potentially unsafe) HTML that should be used to embed * on success, false on failure. */ 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. * * Returning a non-null value from the filter will effectively short-circuit retrieval * and return 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 to continue retrieving the result. * @param string $url The URL to the content that should be attempted to be embedded. * @param string|array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. 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 string|array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. */ 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 string|false The oEmbed provider URL on success, false on failure. */ 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 an 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 string|array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. * @return object|false The result in the form of an object on success, false on failure. */ 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. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. */ $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 * * @since 3.0.0 * * @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.) * @param string $format Format to use. * @return object|false|WP_Error The result in the form of an object on success, false on failure. */ private function _fetch_with_format( $provider_url_with_args, $format ) { $provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args ); /** This filter is documented in wp-includes/class-wp-oembed.php */ $args = apply_filters( 'oembed_remote_get_args', array(), $provider_url_with_args ); $response = wp_safe_remote_get( $provider_url_with_args, $args ); if ( 501 === wp_remote_retrieve_response_code( $response ) ) { return new WP_Error( 'not-implemented' ); } $body = wp_remote_retrieve_body( $response ); if ( ! $body ) { return false; } $parse_method = "_parse_$format"; return $this->$parse_method( $body ); } /** * Parses a json response body. * * @since 3.0.0 * * @param string $response_body * @return object|false */ private function _parse_json( $response_body ) { $data = json_decode( trim( $response_body ) ); return ( $data && is_object( $data ) ) ? $data : false; } /** * Parses an XML response body. * * @since 3.0.0 * * @param string $response_body * @return object|false */ private function _parse_xml( $response_body ) { if ( ! function_exists( 'libxml_disable_entity_loader' ) ) { return false; } if ( PHP_VERSION_ID < 80000 ) { /* * This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading * is disabled by default, so this function is no longer needed to protect against XXE attacks. */ $loader = libxml_disable_entity_loader( true ); } $errors = libxml_use_internal_errors( true ); $return = $this->_parse_xml_body( $response_body ); libxml_use_internal_errors( $errors ); if ( PHP_VERSION_ID < 80000 && isset( $loader ) ) { // phpcs:ignore PHPCompatibility.FunctionUse.RemovedFunctions.libxml_disable_entity_loaderDeprecated libxml_disable_entity_loader( $loader ); } return $return; } /** * Serves as a helper function for parsing an XML response body. * * @since 3.6.0 * * @param string $response_body * @return stdClass|false */ private function _parse_xml_body( $response_body ) { if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument', false ) ) { return false; } $dom = new DOMDocument(); $success = $dom->loadXML( $response_body ); if ( ! $success ) { return false; } if ( isset( $dom->doctype ) ) { return false; } foreach ( $dom->childNodes as $child ) { if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType ) { return false; } } $xml = simplexml_import_dom( $dom ); if ( ! $xml ) { return false; } $return = new stdClass(); foreach ( $xml as $key => $value ) { $return->$key = (string) $value; } return $return; } /** * Converts a data object from WP_oEmbed::fetch() and returns the HTML. * * @since 2.9.0 * * @param object $data A data object result from an oEmbed provider. * @param string $url The URL to the content that is desired to be embedded. * @return string|false The HTML needed to embed on success, false on failure. */ public function data2html( $data, $url ) { if ( ! is_object( $data ) || empty( $data->type ) ) { return false; } $return = false; switch ( $data->type ) { case 'photo': if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) ) { break; } if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) ) { break; } $title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : ''; $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>'; break; case 'video': case 'rich': if ( ! empty( $data->html ) && is_string( $data->html ) ) { $return = $data->html; } break; case 'link': if ( ! empty( $data->title ) && is_string( $data->title ) ) { $return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>'; } break; 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|false $return The returned oEmbed HTML, or false on failure. * @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|false $html Existing HTML. * @param object $data Data object from WP_oEmbed::data2html() * @param string $url The original URL passed to oEmbed. * @return string|false Possibly modified $html. */ public function _strip_newlines( $html, $data, $url ) { if ( ! str_contains( $html, "\n" ) ) { return $html; } $count = 1; $found = array(); $token = '__PRE__'; $search = array( "\t", "\n", "\r", ' ' ); $replace = array( '__TAB__', '__NL__', '__CR__', '__SPACE__' ); $tokenized = str_replace( $search, $replace, $html ); preg_match_all( '#(<pre[^>]*>.+?</pre>)#i', $tokenized, $matches, PREG_SET_ORDER ); foreach ( $matches as $i => $match ) { $tag_html = str_replace( $replace, $search, $match[0] ); $tag_token = $token . $i; $found[ $tag_token ] = $tag_html; $html = str_replace( $tag_html, $tag_token, $html, $count ); } $replaced = str_replace( $replace, $search, $html ); $stripped = str_replace( array( "\r\n", "\n" ), '', $replaced ); $pre = array_values( $found ); $tokens = array_keys( $found ); return str_replace( $tokens, $pre, $stripped ); } }
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