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1 <?php 2 /** 3 * API for fetching the HTML to embed remote content based on a provided URL 4 * 5 * Used internally by the WP_Embed class, but is designed to be generic. 6 * 7 * @link https://wordpress.org/support/article/embeds/ 8 * @link http://oembed.com/ 9 * 10 * @package WordPress 11 * @subpackage oEmbed 12 */ 13 14 /** 15 * Core class used to implement oEmbed functionality. 16 * 17 * @since 2.9.0 18 */ 19 class WP_oEmbed { 20 21 /** 22 * A list of oEmbed providers. 23 * 24 * @since 2.9.0 25 * @var array 26 */ 27 public $providers = array(); 28 29 /** 30 * A list of an early oEmbed providers. 31 * 32 * @since 4.0.0 33 * @var array 34 */ 35 public static $early_providers = array(); 36 37 /** 38 * A list of private/protected methods, used for backward compatibility. 39 * 40 * @since 4.2.0 41 * @var array 42 */ 43 private $compat_methods = array( '_fetch_with_format', '_parse_json', '_parse_xml', '_parse_xml_body' ); 44 45 /** 46 * Constructor. 47 * 48 * @since 2.9.0 49 */ 50 public function __construct() { 51 $host = urlencode( home_url() ); 52 $providers = array( 53 '#https?://((m|www)\.)?youtube\.com/watch.*#i' => array( 'https://www.youtube.com/oembed', true ), 54 '#https?://((m|www)\.)?youtube\.com/playlist.*#i' => array( 'https://www.youtube.com/oembed', true ), 55 '#https?://youtu\.be/.*#i' => array( 'https://www.youtube.com/oembed', true ), 56 '#https?://(.+\.)?vimeo\.com/.*#i' => array( 'https://vimeo.com/api/oembed.{format}', true ), 57 '#https?://(www\.)?dailymotion\.com/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ), 58 '#https?://dai\.ly/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ), 59 '#https?://(www\.)?flickr\.com/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ), 60 '#https?://flic\.kr/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ), 61 '#https?://(.+\.)?smugmug\.com/.*#i' => array( 'https://api.smugmug.com/services/oembed/', true ), 62 '#https?://(www\.)?scribd\.com/(doc|document)/.*#i' => array( 'https://www.scribd.com/services/oembed', true ), 63 '#https?://wordpress\.tv/.*#i' => array( 'https://wordpress.tv/oembed/', true ), 64 '#https?://(.+\.)?polldaddy\.com/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ), 65 '#https?://poll\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ), 66 '#https?://(.+\.)?survey\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ), 67 '#https?://(www\.)?twitter\.com/\w{1,15}/status(es)?/.*#i' => array( 'https://publish.twitter.com/oembed', true ), 68 '#https?://(www\.)?twitter\.com/\w{1,15}$#i' => array( 'https://publish.twitter.com/oembed', true ), 69 '#https?://(www\.)?twitter\.com/\w{1,15}/likes$#i' => array( 'https://publish.twitter.com/oembed', true ), 70 '#https?://(www\.)?twitter\.com/\w{1,15}/lists/.*#i' => array( 'https://publish.twitter.com/oembed', true ), 71 '#https?://(www\.)?twitter\.com/\w{1,15}/timelines/.*#i' => array( 'https://publish.twitter.com/oembed', true ), 72 '#https?://(www\.)?twitter\.com/i/moments/.*#i' => array( 'https://publish.twitter.com/oembed', true ), 73 '#https?://(www\.)?soundcloud\.com/.*#i' => array( 'https://soundcloud.com/oembed', true ), 74 '#https?://(.+?\.)?slideshare\.net/.*#i' => array( 'https://www.slideshare.net/api/oembed/2', true ), 75 '#https?://(open|play)\.spotify\.com/.*#i' => array( 'https://embed.spotify.com/oembed/', true ), 76 '#https?://(.+\.)?imgur\.com/.*#i' => array( 'https://api.imgur.com/oembed', true ), 77 '#https?://(www\.)?meetu(\.ps|p\.com)/.*#i' => array( 'https://api.meetup.com/oembed', true ), 78 '#https?://(www\.)?issuu\.com/.+/docs/.+#i' => array( 'https://issuu.com/oembed_wp', true ), 79 '#https?://(www\.)?mixcloud\.com/.*#i' => array( 'https://www.mixcloud.com/oembed', true ), 80 '#https?://(www\.|embed\.)?ted\.com/talks/.*#i' => array( 'https://www.ted.com/services/v1/oembed.{format}', true ), 81 '#https?://(www\.)?(animoto|video214)\.com/play/.*#i' => array( 'https://animoto.com/oembeds/create', true ), 82 '#https?://(.+)\.tumblr\.com/post/.*#i' => array( 'https://www.tumblr.com/oembed/1.0', true ), 83 '#https?://(www\.)?kickstarter\.com/projects/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ), 84 '#https?://kck\.st/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ), 85 '#https?://cloudup\.com/.*#i' => array( 'https://cloudup.com/oembed', true ), 86 '#https?://(www\.)?reverbnation\.com/.*#i' => array( 'https://www.reverbnation.com/oembed', true ), 87 '#https?://videopress\.com/v/.*#' => array( 'https://public-api.wordpress.com/oembed/?for=' . $host, true ), 88 '#https?://(www\.)?reddit\.com/r/[^/]+/comments/.*#i' => array( 'https://www.reddit.com/oembed', true ), 89 '#https?://(www\.)?speakerdeck\.com/.*#i' => array( 'https://speakerdeck.com/oembed.{format}', true ), 90 '#https?://(www\.)?screencast\.com/.*#i' => array( 'https://api.screencast.com/external/oembed', true ), 91 '#https?://([a-z0-9-]+\.)?amazon\.(com|com\.mx|com\.br|ca)/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ), 92 '#https?://([a-z0-9-]+\.)?amazon\.(co\.uk|de|fr|it|es|in|nl|ru)/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ), 93 '#https?://([a-z0-9-]+\.)?amazon\.(co\.jp|com\.au)/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ), 94 '#https?://([a-z0-9-]+\.)?amazon\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ), 95 '#https?://(www\.)?a\.co/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ), 96 '#https?://(www\.)?amzn\.to/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ), 97 '#https?://(www\.)?amzn\.eu/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ), 98 '#https?://(www\.)?amzn\.in/.*#i' => array( 'https://read.amazon.in/kp/api/oembed', true ), 99 '#https?://(www\.)?amzn\.asia/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ), 100 '#https?://(www\.)?z\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ), 101 '#https?://www\.someecards\.com/.+-cards/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ), 102 '#https?://www\.someecards\.com/usercards/viewcard/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ), 103 '#https?://some\.ly\/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ), 104 '#https?://(www\.)?tiktok\.com/.*/video/.*#i' => array( 'https://www.tiktok.com/oembed', true ), 105 '#https?://([a-z]{2}|www)\.pinterest\.com(\.(au|mx))?/.*#i' => array( 'https://www.pinterest.com/oembed.json', true ), 106 ); 107 108 if ( ! empty( self::$early_providers['add'] ) ) { 109 foreach ( self::$early_providers['add'] as $format => $data ) { 110 $providers[ $format ] = $data; 111 } 112 } 113 114 if ( ! empty( self::$early_providers['remove'] ) ) { 115 foreach ( self::$early_providers['remove'] as $format ) { 116 unset( $providers[ $format ] ); 117 } 118 } 119 120 self::$early_providers = array(); 121 122 /** 123 * Filters the list of sanctioned oEmbed providers. 124 * 125 * Since WordPress 4.4, oEmbed discovery is enabled for all users and allows embedding of sanitized 126 * iframes. The providers in this list are sanctioned, meaning they are trusted and allowed to 127 * embed any content, such as iframes, videos, JavaScript, and arbitrary HTML. 128 * 129 * Supported providers: 130 * 131 * | Provider | Flavor | Since | 132 * | ------------ | ----------------------------------------- | ------- | 133 * | Dailymotion | dailymotion.com | 2.9.0 | 134 * | Flickr | flickr.com | 2.9.0 | 135 * | Scribd | scribd.com | 2.9.0 | 136 * | Vimeo | vimeo.com | 2.9.0 | 137 * | WordPress.tv | wordpress.tv | 2.9.0 | 138 * | YouTube | youtube.com/watch | 2.9.0 | 139 * | Crowdsignal | polldaddy.com | 3.0.0 | 140 * | SmugMug | smugmug.com | 3.0.0 | 141 * | YouTube | youtu.be | 3.0.0 | 142 * | Twitter | twitter.com | 3.4.0 | 143 * | Slideshare | slideshare.net | 3.5.0 | 144 * | SoundCloud | soundcloud.com | 3.5.0 | 145 * | Dailymotion | dai.ly | 3.6.0 | 146 * | Flickr | flic.kr | 3.6.0 | 147 * | Spotify | spotify.com | 3.6.0 | 148 * | Imgur | imgur.com | 3.9.0 | 149 * | Meetup.com | meetup.com | 3.9.0 | 150 * | Meetup.com | meetu.ps | 3.9.0 | 151 * | Animoto | animoto.com | 4.0.0 | 152 * | Animoto | video214.com | 4.0.0 | 153 * | Issuu | issuu.com | 4.0.0 | 154 * | Mixcloud | mixcloud.com | 4.0.0 | 155 * | Crowdsignal | poll.fm | 4.0.0 | 156 * | TED | ted.com | 4.0.0 | 157 * | YouTube | youtube.com/playlist | 4.0.0 | 158 * | Tumblr | tumblr.com | 4.2.0 | 159 * | Kickstarter | kickstarter.com | 4.2.0 | 160 * | Kickstarter | kck.st | 4.2.0 | 161 * | Cloudup | cloudup.com | 4.3.0 | 162 * | ReverbNation | reverbnation.com | 4.4.0 | 163 * | VideoPress | videopress.com | 4.4.0 | 164 * | Reddit | reddit.com | 4.4.0 | 165 * | Speaker Deck | speakerdeck.com | 4.4.0 | 166 * | Twitter | twitter.com/timelines | 4.5.0 | 167 * | Twitter | twitter.com/moments | 4.5.0 | 168 * | Twitter | twitter.com/user | 4.7.0 | 169 * | Twitter | twitter.com/likes | 4.7.0 | 170 * | Twitter | twitter.com/lists | 4.7.0 | 171 * | Screencast | screencast.com | 4.8.0 | 172 * | Amazon | amazon.com (com.mx, com.br, ca) | 4.9.0 | 173 * | Amazon | amazon.de (fr, it, es, in, nl, ru, co.uk) | 4.9.0 | 174 * | Amazon | amazon.co.jp (com.au) | 4.9.0 | 175 * | Amazon | amazon.cn | 4.9.0 | 176 * | Amazon | a.co | 4.9.0 | 177 * | Amazon | amzn.to (eu, in, asia) | 4.9.0 | 178 * | Amazon | z.cn | 4.9.0 | 179 * | Someecards | someecards.com | 4.9.0 | 180 * | Someecards | some.ly | 4.9.0 | 181 * | Crowdsignal | survey.fm | 5.1.0 | 182 * | TikTok | tiktok.com | 5.4.0 | 183 * | Pinterest | pinterest.com | 5.9.0 | 184 * 185 * No longer supported providers: 186 * 187 * | Provider | Flavor | Since | Removed | 188 * | ------------ | -------------------- | --------- | --------- | 189 * | Qik | qik.com | 2.9.0 | 3.9.0 | 190 * | Viddler | viddler.com | 2.9.0 | 4.0.0 | 191 * | Revision3 | revision3.com | 2.9.0 | 4.2.0 | 192 * | Blip | blip.tv | 2.9.0 | 4.4.0 | 193 * | Rdio | rdio.com | 3.6.0 | 4.4.1 | 194 * | Rdio | rd.io | 3.6.0 | 4.4.1 | 195 * | Vine | vine.co | 4.1.0 | 4.9.0 | 196 * | Photobucket | photobucket.com | 2.9.0 | 5.1.0 | 197 * | Funny or Die | funnyordie.com | 3.0.0 | 5.1.0 | 198 * | CollegeHumor | collegehumor.com | 4.0.0 | 5.3.1 | 199 * | Hulu | hulu.com | 2.9.0 | 5.5.0 | 200 * | Instagram | instagram.com | 3.5.0 | 5.5.2 | 201 * | Instagram | instagr.am | 3.5.0 | 5.5.2 | 202 * | Instagram TV | instagram.com | 5.1.0 | 5.5.2 | 203 * | Instagram TV | instagr.am | 5.1.0 | 5.5.2 | 204 * | Facebook | facebook.com | 4.7.0 | 5.5.2 | 205 * 206 * @see wp_oembed_add_provider() 207 * 208 * @since 2.9.0 209 * 210 * @param array[] $providers An array of arrays containing data about popular oEmbed providers. 211 */ 212 $this->providers = apply_filters( 'oembed_providers', $providers ); 213 214 // Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop(). 215 add_filter( 'oembed_dataparse', array( $this, '_strip_newlines' ), 10, 3 ); 216 } 217 218 /** 219 * Exposes private/protected methods for backward compatibility. 220 * 221 * @since 4.0.0 222 * 223 * @param string $name Method to call. 224 * @param array $arguments Arguments to pass when calling. 225 * @return mixed|false Return value of the callback, false otherwise. 226 */ 227 public function __call( $name, $arguments ) { 228 if ( in_array( $name, $this->compat_methods, true ) ) { 229 return $this->$name( ...$arguments ); 230 } 231 return false; 232 } 233 234 /** 235 * Takes a URL and returns the corresponding oEmbed provider's URL, if there is one. 236 * 237 * @since 4.0.0 238 * 239 * @see WP_oEmbed::discover() 240 * 241 * @param string $url The URL to the content. 242 * @param string|array $args { 243 * Optional. Additional provider arguments. Default empty. 244 * 245 * @type bool $discover Optional. Determines whether to attempt to discover link tags 246 * at the given URL for an oEmbed provider when the provider URL 247 * is not found in the built-in providers list. Default true. 248 * } 249 * @return string|false The oEmbed provider URL on success, false on failure. 250 */ 251 public function get_provider( $url, $args = '' ) { 252 $args = wp_parse_args( $args ); 253 254 $provider = false; 255 256 if ( ! isset( $args['discover'] ) ) { 257 $args['discover'] = true; 258 } 259 260 foreach ( $this->providers as $matchmask => $data ) { 261 list( $providerurl, $regex ) = $data; 262 263 // Turn the asterisk-type provider URLs into regex. 264 if ( ! $regex ) { 265 $matchmask = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $matchmask ), '#' ) ) . '#i'; 266 $matchmask = preg_replace( '|^#http\\\://|', '#https?\://', $matchmask ); 267 } 268 269 if ( preg_match( $matchmask, $url ) ) { 270 $provider = str_replace( '{format}', 'json', $providerurl ); // JSON is easier to deal with than XML. 271 break; 272 } 273 } 274 275 if ( ! $provider && $args['discover'] ) { 276 $provider = $this->discover( $url ); 277 } 278 279 return $provider; 280 } 281 282 /** 283 * Adds an oEmbed provider. 284 * 285 * The provider is added just-in-time when wp_oembed_add_provider() is called before 286 * the {@see 'plugins_loaded'} hook. 287 * 288 * The just-in-time addition is for the benefit of the {@see 'oembed_providers'} filter. 289 * 290 * @since 4.0.0 291 * 292 * @see wp_oembed_add_provider() 293 * 294 * @param string $format Format of URL that this provider can handle. You can use 295 * asterisks as wildcards. 296 * @param string $provider The URL to the oEmbed provider.. 297 * @param bool $regex Optional. Whether the $format parameter is in a regex format. 298 * Default false. 299 */ 300 public static function _add_provider_early( $format, $provider, $regex = false ) { 301 if ( empty( self::$early_providers['add'] ) ) { 302 self::$early_providers['add'] = array(); 303 } 304 305 self::$early_providers['add'][ $format ] = array( $provider, $regex ); 306 } 307 308 /** 309 * Removes an oEmbed provider. 310 * 311 * The provider is removed just-in-time when wp_oembed_remove_provider() is called before 312 * the {@see 'plugins_loaded'} hook. 313 * 314 * The just-in-time removal is for the benefit of the {@see 'oembed_providers'} filter. 315 * 316 * @since 4.0.0 317 * 318 * @see wp_oembed_remove_provider() 319 * 320 * @param string $format The format of URL that this provider can handle. You can use 321 * asterisks as wildcards. 322 */ 323 public static function _remove_provider_early( $format ) { 324 if ( empty( self::$early_providers['remove'] ) ) { 325 self::$early_providers['remove'] = array(); 326 } 327 328 self::$early_providers['remove'][] = $format; 329 } 330 331 /** 332 * Takes a URL and attempts to return the oEmbed data. 333 * 334 * @see WP_oEmbed::fetch() 335 * 336 * @since 4.8.0 337 * 338 * @param string $url The URL to the content that should be attempted to be embedded. 339 * @param string|array $args Optional. Additional arguments for retrieving embed HTML. 340 * See wp_oembed_get() for accepted arguments. Default empty. 341 * @return object|false The result in the form of an object on success, false on failure. 342 */ 343 public function get_data( $url, $args = '' ) { 344 $args = wp_parse_args( $args ); 345 346 $provider = $this->get_provider( $url, $args ); 347 348 if ( ! $provider ) { 349 return false; 350 } 351 352 $data = $this->fetch( $provider, $url, $args ); 353 354 if ( false === $data ) { 355 return false; 356 } 357 358 return $data; 359 } 360 361 /** 362 * The do-it-all function that takes a URL and attempts to return the HTML. 363 * 364 * @see WP_oEmbed::fetch() 365 * @see WP_oEmbed::data2html() 366 * 367 * @since 2.9.0 368 * 369 * @param string $url The URL to the content that should be attempted to be embedded. 370 * @param string|array $args Optional. Additional arguments for retrieving embed HTML. 371 * See wp_oembed_get() for accepted arguments. Default empty. 372 * @return string|false The UNSANITIZED (and potentially unsafe) HTML that should be used to embed 373 * on success, false on failure. 374 */ 375 public function get_html( $url, $args = '' ) { 376 /** 377 * Filters the oEmbed result before any HTTP requests are made. 378 * 379 * This allows one to short-circuit the default logic, perhaps by 380 * replacing it with a routine that is more optimal for your setup. 381 * 382 * Returning a non-null value from the filter will effectively short-circuit retrieval 383 * and return the passed value instead. 384 * 385 * @since 4.5.3 386 * 387 * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. 388 * Default null to continue retrieving the result. 389 * @param string $url The URL to the content that should be attempted to be embedded. 390 * @param string|array $args Optional. Additional arguments for retrieving embed HTML. 391 * See wp_oembed_get() for accepted arguments. Default empty. 392 */ 393 $pre = apply_filters( 'pre_oembed_result', null, $url, $args ); 394 395 if ( null !== $pre ) { 396 return $pre; 397 } 398 399 $data = $this->get_data( $url, $args ); 400 401 if ( false === $data ) { 402 return false; 403 } 404 405 /** 406 * Filters the HTML returned by the oEmbed provider. 407 * 408 * @since 2.9.0 409 * 410 * @param string|false $data The returned oEmbed HTML (false if unsafe). 411 * @param string $url URL of the content to be embedded. 412 * @param string|array $args Optional. Additional arguments for retrieving embed HTML. 413 * See wp_oembed_get() for accepted arguments. Default empty. 414 */ 415 return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args ); 416 } 417 418 /** 419 * Attempts to discover link tags at the given URL for an oEmbed provider. 420 * 421 * @since 2.9.0 422 * 423 * @param string $url The URL that should be inspected for discovery `<link>` tags. 424 * @return string|false The oEmbed provider URL on success, false on failure. 425 */ 426 public function discover( $url ) { 427 $providers = array(); 428 $args = array( 429 'limit_response_size' => 153600, // 150 KB 430 ); 431 432 /** 433 * Filters oEmbed remote get arguments. 434 * 435 * @since 4.0.0 436 * 437 * @see WP_Http::request() 438 * 439 * @param array $args oEmbed remote get arguments. 440 * @param string $url URL to be inspected. 441 */ 442 $args = apply_filters( 'oembed_remote_get_args', $args, $url ); 443 444 // Fetch URL content. 445 $request = wp_safe_remote_get( $url, $args ); 446 $html = wp_remote_retrieve_body( $request ); 447 if ( $html ) { 448 449 /** 450 * Filters the link types that contain oEmbed provider URLs. 451 * 452 * @since 2.9.0 453 * 454 * @param string[] $format Array of oEmbed link types. Accepts 'application/json+oembed', 455 * 'text/xml+oembed', and 'application/xml+oembed' (incorrect, 456 * used by at least Vimeo). 457 */ 458 $linktypes = apply_filters( 459 'oembed_linktypes', 460 array( 461 'application/json+oembed' => 'json', 462 'text/xml+oembed' => 'xml', 463 'application/xml+oembed' => 'xml', 464 ) 465 ); 466 467 // Strip <body>. 468 $html_head_end = stripos( $html, '</head>' ); 469 if ( $html_head_end ) { 470 $html = substr( $html, 0, $html_head_end ); 471 } 472 473 // Do a quick check. 474 $tagfound = false; 475 foreach ( $linktypes as $linktype => $format ) { 476 if ( stripos( $html, $linktype ) ) { 477 $tagfound = true; 478 break; 479 } 480 } 481 482 if ( $tagfound && preg_match_all( '#<link([^<>]+)/?>#iU', $html, $links ) ) { 483 foreach ( $links[1] as $link ) { 484 $atts = shortcode_parse_atts( $link ); 485 486 if ( ! empty( $atts['type'] ) && ! empty( $linktypes[ $atts['type'] ] ) && ! empty( $atts['href'] ) ) { 487 $providers[ $linktypes[ $atts['type'] ] ] = htmlspecialchars_decode( $atts['href'] ); 488 489 // Stop here if it's JSON (that's all we need). 490 if ( 'json' === $linktypes[ $atts['type'] ] ) { 491 break; 492 } 493 } 494 } 495 } 496 } 497 498 // JSON is preferred to XML. 499 if ( ! empty( $providers['json'] ) ) { 500 return $providers['json']; 501 } elseif ( ! empty( $providers['xml'] ) ) { 502 return $providers['xml']; 503 } else { 504 return false; 505 } 506 } 507 508 /** 509 * Connects to a oEmbed provider and returns the result. 510 * 511 * @since 2.9.0 512 * 513 * @param string $provider The URL to the oEmbed provider. 514 * @param string $url The URL to the content that is desired to be embedded. 515 * @param string|array $args Optional. Additional arguments for retrieving embed HTML. 516 * See wp_oembed_get() for accepted arguments. Default empty. 517 * @return object|false The result in the form of an object on success, false on failure. 518 */ 519 public function fetch( $provider, $url, $args = '' ) { 520 $args = wp_parse_args( $args, wp_embed_defaults( $url ) ); 521 522 $provider = add_query_arg( 'maxwidth', (int) $args['width'], $provider ); 523 $provider = add_query_arg( 'maxheight', (int) $args['height'], $provider ); 524 $provider = add_query_arg( 'url', urlencode( $url ), $provider ); 525 $provider = add_query_arg( 'dnt', 1, $provider ); 526 527 /** 528 * Filters the oEmbed URL to be fetched. 529 * 530 * @since 2.9.0 531 * @since 4.9.0 The `dnt` (Do Not Track) query parameter was added to all oEmbed provider URLs. 532 * 533 * @param string $provider URL of the oEmbed provider. 534 * @param string $url URL of the content to be embedded. 535 * @param array $args Optional. Additional arguments for retrieving embed HTML. 536 * See wp_oembed_get() for accepted arguments. Default empty. 537 */ 538 $provider = apply_filters( 'oembed_fetch_url', $provider, $url, $args ); 539 540 foreach ( array( 'json', 'xml' ) as $format ) { 541 $result = $this->_fetch_with_format( $provider, $format ); 542 if ( is_wp_error( $result ) && 'not-implemented' === $result->get_error_code() ) { 543 continue; 544 } 545 return ( $result && ! is_wp_error( $result ) ) ? $result : false; 546 } 547 return false; 548 } 549 550 /** 551 * Fetches result from an oEmbed provider for a specific format and complete provider URL 552 * 553 * @since 3.0.0 554 * 555 * @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.) 556 * @param string $format Format to use. 557 * @return object|false|WP_Error The result in the form of an object on success, false on failure. 558 */ 559 private function _fetch_with_format( $provider_url_with_args, $format ) { 560 $provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args ); 561 562 /** This filter is documented in wp-includes/class-wp-oembed.php */ 563 $args = apply_filters( 'oembed_remote_get_args', array(), $provider_url_with_args ); 564 565 $response = wp_safe_remote_get( $provider_url_with_args, $args ); 566 if ( 501 == wp_remote_retrieve_response_code( $response ) ) { 567 return new WP_Error( 'not-implemented' ); 568 } 569 $body = wp_remote_retrieve_body( $response ); 570 if ( ! $body ) { 571 return false; 572 } 573 $parse_method = "_parse_$format"; 574 return $this->$parse_method( $body ); 575 } 576 577 /** 578 * Parses a json response body. 579 * 580 * @since 3.0.0 581 * 582 * @param string $response_body 583 * @return object|false 584 */ 585 private function _parse_json( $response_body ) { 586 $data = json_decode( trim( $response_body ) ); 587 return ( $data && is_object( $data ) ) ? $data : false; 588 } 589 590 /** 591 * Parses an XML response body. 592 * 593 * @since 3.0.0 594 * 595 * @param string $response_body 596 * @return object|false 597 */ 598 private function _parse_xml( $response_body ) { 599 if ( ! function_exists( 'libxml_disable_entity_loader' ) ) { 600 return false; 601 } 602 603 if ( PHP_VERSION_ID < 80000 ) { 604 // This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading 605 // is disabled by default, so this function is no longer needed to protect against XXE attacks. 606 // phpcs:ignore PHPCompatibility.FunctionUse.RemovedFunctions.libxml_disable_entity_loaderDeprecated 607 $loader = libxml_disable_entity_loader( true ); 608 } 609 610 $errors = libxml_use_internal_errors( true ); 611 612 $return = $this->_parse_xml_body( $response_body ); 613 614 libxml_use_internal_errors( $errors ); 615 616 if ( PHP_VERSION_ID < 80000 && isset( $loader ) ) { 617 // phpcs:ignore PHPCompatibility.FunctionUse.RemovedFunctions.libxml_disable_entity_loaderDeprecated 618 libxml_disable_entity_loader( $loader ); 619 } 620 621 return $return; 622 } 623 624 /** 625 * Serves as a helper function for parsing an XML response body. 626 * 627 * @since 3.6.0 628 * 629 * @param string $response_body 630 * @return stdClass|false 631 */ 632 private function _parse_xml_body( $response_body ) { 633 if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument', false ) ) { 634 return false; 635 } 636 637 $dom = new DOMDocument; 638 $success = $dom->loadXML( $response_body ); 639 if ( ! $success ) { 640 return false; 641 } 642 643 if ( isset( $dom->doctype ) ) { 644 return false; 645 } 646 647 foreach ( $dom->childNodes as $child ) { 648 if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType ) { 649 return false; 650 } 651 } 652 653 $xml = simplexml_import_dom( $dom ); 654 if ( ! $xml ) { 655 return false; 656 } 657 658 $return = new stdClass; 659 foreach ( $xml as $key => $value ) { 660 $return->$key = (string) $value; 661 } 662 663 return $return; 664 } 665 666 /** 667 * Converts a data object from WP_oEmbed::fetch() and returns the HTML. 668 * 669 * @since 2.9.0 670 * 671 * @param object $data A data object result from an oEmbed provider. 672 * @param string $url The URL to the content that is desired to be embedded. 673 * @return string|false The HTML needed to embed on success, false on failure. 674 */ 675 public function data2html( $data, $url ) { 676 if ( ! is_object( $data ) || empty( $data->type ) ) { 677 return false; 678 } 679 680 $return = false; 681 682 switch ( $data->type ) { 683 case 'photo': 684 if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) ) { 685 break; 686 } 687 if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) ) { 688 break; 689 } 690 691 $title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : ''; 692 $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>'; 693 break; 694 695 case 'video': 696 case 'rich': 697 if ( ! empty( $data->html ) && is_string( $data->html ) ) { 698 $return = $data->html; 699 } 700 break; 701 702 case 'link': 703 if ( ! empty( $data->title ) && is_string( $data->title ) ) { 704 $return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>'; 705 } 706 break; 707 708 default: 709 $return = false; 710 } 711 712 /** 713 * Filters the returned oEmbed HTML. 714 * 715 * Use this filter to add support for custom data types, or to filter the result. 716 * 717 * @since 2.9.0 718 * 719 * @param string $return The returned oEmbed HTML. 720 * @param object $data A data object result from an oEmbed provider. 721 * @param string $url The URL of the content to be embedded. 722 */ 723 return apply_filters( 'oembed_dataparse', $return, $data, $url ); 724 } 725 726 /** 727 * Strips any new lines from the HTML. 728 * 729 * @since 2.9.0 as strip_scribd_newlines() 730 * @since 3.0.0 731 * 732 * @param string $html Existing HTML. 733 * @param object $data Data object from WP_oEmbed::data2html() 734 * @param string $url The original URL passed to oEmbed. 735 * @return string Possibly modified $html 736 */ 737 public function _strip_newlines( $html, $data, $url ) { 738 if ( false === strpos( $html, "\n" ) ) { 739 return $html; 740 } 741 742 $count = 1; 743 $found = array(); 744 $token = '__PRE__'; 745 $search = array( "\t", "\n", "\r", ' ' ); 746 $replace = array( '__TAB__', '__NL__', '__CR__', '__SPACE__' ); 747 $tokenized = str_replace( $search, $replace, $html ); 748 749 preg_match_all( '#(<pre[^>]*>.+?</pre>)#i', $tokenized, $matches, PREG_SET_ORDER ); 750 foreach ( $matches as $i => $match ) { 751 $tag_html = str_replace( $replace, $search, $match[0] ); 752 $tag_token = $token . $i; 753 754 $found[ $tag_token ] = $tag_html; 755 $html = str_replace( $tag_html, $tag_token, $html, $count ); 756 } 757 758 $replaced = str_replace( $replace, $search, $html ); 759 $stripped = str_replace( array( "\r\n", "\n" ), '', $replaced ); 760 $pre = array_values( $found ); 761 $tokens = array_keys( $found ); 762 763 return str_replace( $tokens, $pre, $stripped ); 764 } 765 }
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| Generated: Fri Sep 24 01:00:04 2021 | Cross-referenced by PHPXref 0.7.1 |