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1 <?php 2 /** 3 * oEmbed API: Top-level oEmbed functionality 4 * 5 * @package WordPress 6 * @subpackage oEmbed 7 * @since 4.4.0 8 */ 9 10 /** 11 * Registers an embed handler. 12 * 13 * Should probably only be used for sites that do not support oEmbed. 14 * 15 * @since 2.9.0 16 * 17 * @global WP_Embed $wp_embed 18 * 19 * @param string $id An internal ID/name for the handler. Needs to be unique. 20 * @param string $regex The regex that will be used to see if this handler should be used for a URL. 21 * @param callable $callback The callback function that will be called if the regex is matched. 22 * @param int $priority Optional. Used to specify the order in which the registered handlers will 23 * be tested. Default 10. 24 */ 25 function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) { 26 global $wp_embed; 27 $wp_embed->register_handler( $id, $regex, $callback, $priority ); 28 } 29 30 /** 31 * Unregisters a previously-registered embed handler. 32 * 33 * @since 2.9.0 34 * 35 * @global WP_Embed $wp_embed 36 * 37 * @param string $id The handler ID that should be removed. 38 * @param int $priority Optional. The priority of the handler to be removed. Default 10. 39 */ 40 function wp_embed_unregister_handler( $id, $priority = 10 ) { 41 global $wp_embed; 42 $wp_embed->unregister_handler( $id, $priority ); 43 } 44 45 /** 46 * Creates default array of embed parameters. 47 * 48 * The width defaults to the content width as specified by the theme. If the 49 * theme does not specify a content width, then 500px is used. 50 * 51 * The default height is 1.5 times the width, or 1000px, whichever is smaller. 52 * 53 * The {@see 'embed_defaults'} filter can be used to adjust either of these values. 54 * 55 * @since 2.9.0 56 * 57 * @global int $content_width 58 * 59 * @param string $url Optional. The URL that should be embedded. Default empty. 60 * 61 * @return array Default embed parameters. 62 */ 63 function wp_embed_defaults( $url = '' ) { 64 if ( ! empty( $GLOBALS['content_width'] ) ) { 65 $width = (int) $GLOBALS['content_width']; 66 } 67 68 if ( empty( $width ) ) { 69 $width = 500; 70 } 71 72 $height = min( ceil( $width * 1.5 ), 1000 ); 73 74 /** 75 * Filters the default array of embed dimensions. 76 * 77 * @since 2.9.0 78 * 79 * @param array $size An array of embed width and height values 80 * in pixels (in that order). 81 * @param string $url The URL that should be embedded. 82 */ 83 return apply_filters( 'embed_defaults', compact( 'width', 'height' ), $url ); 84 } 85 86 /** 87 * Attempts to fetch the embed HTML for a provided URL using oEmbed. 88 * 89 * @since 2.9.0 90 * 91 * @see WP_oEmbed 92 * 93 * @param string $url The URL that should be embedded. 94 * @param array $args Optional. Additional arguments and parameters for retrieving embed HTML. 95 * Default empty. 96 * @return false|string False on failure or the embed HTML on success. 97 */ 98 function wp_oembed_get( $url, $args = '' ) { 99 $oembed = _wp_oembed_get_object(); 100 return $oembed->get_html( $url, $args ); 101 } 102 103 /** 104 * Returns the initialized WP_oEmbed object. 105 * 106 * @since 2.9.0 107 * @access private 108 * 109 * @staticvar WP_oEmbed $wp_oembed 110 * 111 * @return WP_oEmbed object. 112 */ 113 function _wp_oembed_get_object() { 114 static $wp_oembed = null; 115 116 if ( is_null( $wp_oembed ) ) { 117 $wp_oembed = new WP_oEmbed(); 118 } 119 return $wp_oembed; 120 } 121 122 /** 123 * Adds a URL format and oEmbed provider URL pair. 124 * 125 * @since 2.9.0 126 * 127 * @see WP_oEmbed 128 * 129 * @param string $format The format of URL that this provider can handle. You can use asterisks 130 * as wildcards. 131 * @param string $provider The URL to the oEmbed provider. 132 * @param boolean $regex Optional. Whether the `$format` parameter is in a RegEx format. Default false. 133 */ 134 function wp_oembed_add_provider( $format, $provider, $regex = false ) { 135 if ( did_action( 'plugins_loaded' ) ) { 136 $oembed = _wp_oembed_get_object(); 137 $oembed->providers[ $format ] = array( $provider, $regex ); 138 } else { 139 WP_oEmbed::_add_provider_early( $format, $provider, $regex ); 140 } 141 } 142 143 /** 144 * Removes an oEmbed provider. 145 * 146 * @since 3.5.0 147 * 148 * @see WP_oEmbed 149 * 150 * @param string $format The URL format for the oEmbed provider to remove. 151 * @return bool Was the provider removed successfully? 152 */ 153 function wp_oembed_remove_provider( $format ) { 154 if ( did_action( 'plugins_loaded' ) ) { 155 $oembed = _wp_oembed_get_object(); 156 157 if ( isset( $oembed->providers[ $format ] ) ) { 158 unset( $oembed->providers[ $format ] ); 159 return true; 160 } 161 } else { 162 WP_oEmbed::_remove_provider_early( $format ); 163 } 164 165 return false; 166 } 167 168 /** 169 * Determines if default embed handlers should be loaded. 170 * 171 * Checks to make sure that the embeds library hasn't already been loaded. If 172 * it hasn't, then it will load the embeds library. 173 * 174 * @since 2.9.0 175 * 176 * @see wp_embed_register_handler() 177 */ 178 function wp_maybe_load_embeds() { 179 /** 180 * Filters whether to load the default embed handlers. 181 * 182 * Returning a falsey value will prevent loading the default embed handlers. 183 * 184 * @since 2.9.0 185 * 186 * @param bool $maybe_load_embeds Whether to load the embeds library. Default true. 187 */ 188 if ( ! apply_filters( 'load_default_embeds', true ) ) { 189 return; 190 } 191 192 wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/(?:v|embed)/([^/]+)#i', 'wp_embed_handler_youtube' ); 193 194 /** 195 * Filters the audio embed handler callback. 196 * 197 * @since 3.6.0 198 * 199 * @param callable $handler Audio embed handler callback function. 200 */ 201 wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . join( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 ); 202 203 /** 204 * Filters the video embed handler callback. 205 * 206 * @since 3.6.0 207 * 208 * @param callable $handler Video embed handler callback function. 209 */ 210 wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 ); 211 } 212 213 /** 214 * YouTube iframe embed handler callback. 215 * 216 * Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is. 217 * 218 * @since 4.0.0 219 * 220 * @global WP_Embed $wp_embed 221 * 222 * @param array $matches The RegEx matches from the provided regex when calling 223 * wp_embed_register_handler(). 224 * @param array $attr Embed attributes. 225 * @param string $url The original URL that was matched by the regex. 226 * @param array $rawattr The original unmodified attributes. 227 * @return string The embed HTML. 228 */ 229 function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) { 230 global $wp_embed; 231 $embed = $wp_embed->autoembed( sprintf( 'https://youtube.com/watch?v=%s', urlencode( $matches[2] ) ) ); 232 233 /** 234 * Filters the YoutTube embed output. 235 * 236 * @since 4.0.0 237 * 238 * @see wp_embed_handler_youtube() 239 * 240 * @param string $embed YouTube embed output. 241 * @param array $attr An array of embed attributes. 242 * @param string $url The original URL that was matched by the regex. 243 * @param array $rawattr The original unmodified attributes. 244 */ 245 return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr ); 246 } 247 248 /** 249 * Audio embed handler callback. 250 * 251 * @since 3.6.0 252 * 253 * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). 254 * @param array $attr Embed attributes. 255 * @param string $url The original URL that was matched by the regex. 256 * @param array $rawattr The original unmodified attributes. 257 * @return string The embed HTML. 258 */ 259 function wp_embed_handler_audio( $matches, $attr, $url, $rawattr ) { 260 $audio = sprintf( '[audio src="%s" /]', esc_url( $url ) ); 261 262 /** 263 * Filters the audio embed output. 264 * 265 * @since 3.6.0 266 * 267 * @param string $audio Audio embed output. 268 * @param array $attr An array of embed attributes. 269 * @param string $url The original URL that was matched by the regex. 270 * @param array $rawattr The original unmodified attributes. 271 */ 272 return apply_filters( 'wp_embed_handler_audio', $audio, $attr, $url, $rawattr ); 273 } 274 275 /** 276 * Video embed handler callback. 277 * 278 * @since 3.6.0 279 * 280 * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). 281 * @param array $attr Embed attributes. 282 * @param string $url The original URL that was matched by the regex. 283 * @param array $rawattr The original unmodified attributes. 284 * @return string The embed HTML. 285 */ 286 function wp_embed_handler_video( $matches, $attr, $url, $rawattr ) { 287 $dimensions = ''; 288 if ( ! empty( $rawattr['width'] ) && ! empty( $rawattr['height'] ) ) { 289 $dimensions .= sprintf( 'width="%d" ', (int) $rawattr['width'] ); 290 $dimensions .= sprintf( 'height="%d" ', (int) $rawattr['height'] ); 291 } 292 $video = sprintf( '[video %s src="%s" /]', $dimensions, esc_url( $url ) ); 293 294 /** 295 * Filters the video embed output. 296 * 297 * @since 3.6.0 298 * 299 * @param string $video Video embed output. 300 * @param array $attr An array of embed attributes. 301 * @param string $url The original URL that was matched by the regex. 302 * @param array $rawattr The original unmodified attributes. 303 */ 304 return apply_filters( 'wp_embed_handler_video', $video, $attr, $url, $rawattr ); 305 } 306 307 /** 308 * Registers the oEmbed REST API route. 309 * 310 * @since 4.4.0 311 */ 312 function wp_oembed_register_route() { 313 $controller = new WP_oEmbed_Controller(); 314 $controller->register_routes(); 315 } 316 317 /** 318 * Adds oEmbed discovery links in the website <head>. 319 * 320 * @since 4.4.0 321 */ 322 function wp_oembed_add_discovery_links() { 323 $output = ''; 324 325 if ( is_singular() ) { 326 $output .= '<link rel="alternate" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n"; 327 328 if ( class_exists( 'SimpleXMLElement' ) ) { 329 $output .= '<link rel="alternate" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\n"; 330 } 331 } 332 333 /** 334 * Filters the oEmbed discovery links HTML. 335 * 336 * @since 4.4.0 337 * 338 * @param string $output HTML of the discovery links. 339 */ 340 echo apply_filters( 'oembed_discovery_links', $output ); 341 } 342 343 /** 344 * Adds the necessary JavaScript to communicate with the embedded iframes. 345 * 346 * @since 4.4.0 347 */ 348 function wp_oembed_add_host_js() { 349 wp_enqueue_script( 'wp-embed' ); 350 } 351 352 /** 353 * Retrieves the URL to embed a specific post in an iframe. 354 * 355 * @since 4.4.0 356 * 357 * @param int|WP_Post $post Optional. Post ID or object. Defaults to the current post. 358 * @return string|false The post embed URL on success, false if the post doesn't exist. 359 */ 360 function get_post_embed_url( $post = null ) { 361 $post = get_post( $post ); 362 363 if ( ! $post ) { 364 return false; 365 } 366 367 $embed_url = trailingslashit( get_permalink( $post ) ) . user_trailingslashit( 'embed' ); 368 $path_conflict = get_page_by_path( str_replace( home_url(), '', $embed_url ), OBJECT, get_post_types( array( 'public' => true ) ) ); 369 370 if ( ! get_option( 'permalink_structure' ) || $path_conflict ) { 371 $embed_url = add_query_arg( array( 'embed' => 'true' ), get_permalink( $post ) ); 372 } 373 374 /** 375 * Filters the URL to embed a specific post. 376 * 377 * @since 4.4.0 378 * 379 * @param string $embed_url The post embed URL. 380 * @param WP_Post $post The corresponding post object. 381 */ 382 return esc_url_raw( apply_filters( 'post_embed_url', $embed_url, $post ) ); 383 } 384 385 /** 386 * Retrieves the oEmbed endpoint URL for a given permalink. 387 * 388 * Pass an empty string as the first argument to get the endpoint base URL. 389 * 390 * @since 4.4.0 391 * 392 * @param string $permalink Optional. The permalink used for the `url` query arg. Default empty. 393 * @param string $format Optional. The requested response format. Default 'json'. 394 * @return string The oEmbed endpoint URL. 395 */ 396 function get_oembed_endpoint_url( $permalink = '', $format = 'json' ) { 397 $url = rest_url( 'oembed/1.0/embed' ); 398 399 if ( '' !== $permalink ) { 400 $url = add_query_arg( 401 array( 402 'url' => urlencode( $permalink ), 403 'format' => ( 'json' !== $format ) ? $format : false, 404 ), 405 $url 406 ); 407 } 408 409 /** 410 * Filters the oEmbed endpoint URL. 411 * 412 * @since 4.4.0 413 * 414 * @param string $url The URL to the oEmbed endpoint. 415 * @param string $permalink The permalink used for the `url` query arg. 416 * @param string $format The requested response format. 417 */ 418 return apply_filters( 'oembed_endpoint_url', $url, $permalink, $format ); 419 } 420 421 /** 422 * Retrieves the embed code for a specific post. 423 * 424 * @since 4.4.0 425 * 426 * @param int $width The width for the response. 427 * @param int $height The height for the response. 428 * @param int|WP_Post $post Optional. Post ID or object. Default is global `$post`. 429 * @return string|false Embed code on success, false if post doesn't exist. 430 */ 431 function get_post_embed_html( $width, $height, $post = null ) { 432 $post = get_post( $post ); 433 434 if ( ! $post ) { 435 return false; 436 } 437 438 $embed_url = get_post_embed_url( $post ); 439 440 $output = '<blockquote class="wp-embedded-content"><a href="' . esc_url( get_permalink( $post ) ) . '">' . get_the_title( $post ) . "</a></blockquote>\n"; 441 442 $output .= "<script type='text/javascript'>\n"; 443 $output .= "<!--//--><![CDATA[//><!--\n"; 444 if ( SCRIPT_DEBUG ) { 445 $output .= file_get_contents( ABSPATH . WPINC . '/js/wp-embed.js' ); 446 } else { 447 /* 448 * If you're looking at a src version of this file, you'll see an "include" 449 * statement below. This is used by the `npm run build` process to directly 450 * include a minified version of wp-embed.js, instead of using the 451 * file_get_contents() method from above. 452 * 453 * If you're looking at a build version of this file, you'll see a string of 454 * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG 455 * and edit wp-embed.js directly. 456 */ 457 $output .= <<<JS 458 !function(a,b){"use strict";function c(){if(!e){e=!0;var a,c,d,f,g=-1!==navigator.appVersion.indexOf("MSIE 10"),h=!!navigator.userAgent.match(/Trident.*rv:11\./),i=b.querySelectorAll("iframe.wp-embedded-content");for(c=0;c<i.length;c++){if(d=i[c],!d.getAttribute("data-secret"))f=Math.random().toString(36).substr(2,10),d.src+="#?secret="+f,d.setAttribute("data-secret",f);if(g||h)a=d.cloneNode(!0),a.removeAttribute("security"),d.parentNode.replaceChild(a,d)}}}var d=!1,e=!1;if(b.querySelector)if(a.addEventListener)d=!0;if(a.wp=a.wp||{},!a.wp.receiveEmbedMessage)if(a.wp.receiveEmbedMessage=function(c){var d=c.data;if(d)if(d.secret||d.message||d.value)if(!/[^a-zA-Z0-9]/.test(d.secret)){var e,f,g,h,i,j=b.querySelectorAll('iframe[data-secret="'+d.secret+'"]'),k=b.querySelectorAll('blockquote[data-secret="'+d.secret+'"]');for(e=0;e<k.length;e++)k[e].style.display="none";for(e=0;e<j.length;e++)if(f=j[e],c.source===f.contentWindow){if(f.removeAttribute("style"),"height"===d.message){if(g=parseInt(d.value,10),g>1e3)g=1e3;else if(~~g<200)g=200;f.height=g}if("link"===d.message)if(h=b.createElement("a"),i=b.createElement("a"),h.href=f.getAttribute("src"),i.href=d.value,i.host===h.host)if(b.activeElement===f)a.top.location.href=d.value}else;}},d)a.addEventListener("message",a.wp.receiveEmbedMessage,!1),b.addEventListener("DOMContentLoaded",c,!1),a.addEventListener("load",c,!1)}(window,document); 459 JS; 460 } 461 $output .= "\n//--><!]]>"; 462 $output .= "\n</script>"; 463 464 $output .= sprintf( 465 '<iframe sandbox="allow-scripts" security="restricted" src="%1$s" width="%2$d" height="%3$d" title="%4$s" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>', 466 esc_url( $embed_url ), 467 absint( $width ), 468 absint( $height ), 469 esc_attr( 470 sprintf( 471 /* translators: 1: Post title, 2: Site title. */ 472 __( '“%1$s” — %2$s' ), 473 get_the_title( $post ), 474 get_bloginfo( 'name' ) 475 ) 476 ) 477 ); 478 479 /** 480 * Filters the embed HTML output for a given post. 481 * 482 * @since 4.4.0 483 * 484 * @param string $output The default iframe tag to display embedded content. 485 * @param WP_Post $post Current post object. 486 * @param int $width Width of the response. 487 * @param int $height Height of the response. 488 */ 489 return apply_filters( 'embed_html', $output, $post, $width, $height ); 490 } 491 492 /** 493 * Retrieves the oEmbed response data for a given post. 494 * 495 * @since 4.4.0 496 * 497 * @param WP_Post|int $post Post object or ID. 498 * @param int $width The requested width. 499 * @return array|false Response data on success, false if post doesn't exist. 500 */ 501 function get_oembed_response_data( $post, $width ) { 502 $post = get_post( $post ); 503 $width = absint( $width ); 504 505 if ( ! $post ) { 506 return false; 507 } 508 509 if ( 'publish' !== get_post_status( $post ) ) { 510 return false; 511 } 512 513 /** 514 * Filters the allowed minimum and maximum widths for the oEmbed response. 515 * 516 * @since 4.4.0 517 * 518 * @param array $min_max_width { 519 * Minimum and maximum widths for the oEmbed response. 520 * 521 * @type int $min Minimum width. Default 200. 522 * @type int $max Maximum width. Default 600. 523 * } 524 */ 525 $min_max_width = apply_filters( 526 'oembed_min_max_width', 527 array( 528 'min' => 200, 529 'max' => 600, 530 ) 531 ); 532 533 $width = min( max( $min_max_width['min'], $width ), $min_max_width['max'] ); 534 $height = max( ceil( $width / 16 * 9 ), 200 ); 535 536 $data = array( 537 'version' => '1.0', 538 'provider_name' => get_bloginfo( 'name' ), 539 'provider_url' => get_home_url(), 540 'author_name' => get_bloginfo( 'name' ), 541 'author_url' => get_home_url(), 542 'title' => get_the_title( $post ), 543 'type' => 'link', 544 ); 545 546 $author = get_userdata( $post->post_author ); 547 548 if ( $author ) { 549 $data['author_name'] = $author->display_name; 550 $data['author_url'] = get_author_posts_url( $author->ID ); 551 } 552 553 /** 554 * Filters the oEmbed response data. 555 * 556 * @since 4.4.0 557 * 558 * @param array $data The response data. 559 * @param WP_Post $post The post object. 560 * @param int $width The requested width. 561 * @param int $height The calculated height. 562 */ 563 return apply_filters( 'oembed_response_data', $data, $post, $width, $height ); 564 } 565 566 567 /** 568 * Retrieves the oEmbed response data for a given URL. 569 * 570 * @since 5.0.0 571 * 572 * @param string $url The URL that should be inspected for discovery `<link>` tags. 573 * @param array $args oEmbed remote get arguments. 574 * @return object|false oEmbed response data if the URL does belong to the current site. False otherwise. 575 */ 576 function get_oembed_response_data_for_url( $url, $args ) { 577 $switched_blog = false; 578 579 if ( is_multisite() ) { 580 $url_parts = wp_parse_args( 581 wp_parse_url( $url ), 582 array( 583 'host' => '', 584 'path' => '/', 585 ) 586 ); 587 588 $qv = array( 589 'domain' => $url_parts['host'], 590 'path' => '/', 591 'update_site_meta_cache' => false, 592 ); 593 594 // In case of subdirectory configs, set the path. 595 if ( ! is_subdomain_install() ) { 596 $path = explode( '/', ltrim( $url_parts['path'], '/' ) ); 597 $path = reset( $path ); 598 599 if ( $path ) { 600 $qv['path'] = get_network()->path . $path . '/'; 601 } 602 } 603 604 $sites = get_sites( $qv ); 605 $site = reset( $sites ); 606 607 if ( $site && (int) $site->blog_id !== get_current_blog_id() ) { 608 switch_to_blog( $site->blog_id ); 609 $switched_blog = true; 610 } 611 } 612 613 $post_id = url_to_postid( $url ); 614 615 /** This filter is documented in wp-includes/class-wp-oembed-controller.php */ 616 $post_id = apply_filters( 'oembed_request_post_id', $post_id, $url ); 617 618 if ( ! $post_id ) { 619 if ( $switched_blog ) { 620 restore_current_blog(); 621 } 622 623 return false; 624 } 625 626 $width = isset( $args['width'] ) ? $args['width'] : 0; 627 628 $data = get_oembed_response_data( $post_id, $width ); 629 630 if ( $switched_blog ) { 631 restore_current_blog(); 632 } 633 634 return $data ? (object) $data : false; 635 } 636 637 638 /** 639 * Filters the oEmbed response data to return an iframe embed code. 640 * 641 * @since 4.4.0 642 * 643 * @param array $data The response data. 644 * @param WP_Post $post The post object. 645 * @param int $width The requested width. 646 * @param int $height The calculated height. 647 * @return array The modified response data. 648 */ 649 function get_oembed_response_data_rich( $data, $post, $width, $height ) { 650 $data['width'] = absint( $width ); 651 $data['height'] = absint( $height ); 652 $data['type'] = 'rich'; 653 $data['html'] = get_post_embed_html( $width, $height, $post ); 654 655 // Add post thumbnail to response if available. 656 $thumbnail_id = false; 657 658 if ( has_post_thumbnail( $post->ID ) ) { 659 $thumbnail_id = get_post_thumbnail_id( $post->ID ); 660 } 661 662 if ( 'attachment' === get_post_type( $post ) ) { 663 if ( wp_attachment_is_image( $post ) ) { 664 $thumbnail_id = $post->ID; 665 } elseif ( wp_attachment_is( 'video', $post ) ) { 666 $thumbnail_id = get_post_thumbnail_id( $post ); 667 $data['type'] = 'video'; 668 } 669 } 670 671 if ( $thumbnail_id ) { 672 list( $thumbnail_url, $thumbnail_width, $thumbnail_height ) = wp_get_attachment_image_src( $thumbnail_id, array( $width, 99999 ) ); 673 $data['thumbnail_url'] = $thumbnail_url; 674 $data['thumbnail_width'] = $thumbnail_width; 675 $data['thumbnail_height'] = $thumbnail_height; 676 } 677 678 return $data; 679 } 680 681 /** 682 * Ensures that the specified format is either 'json' or 'xml'. 683 * 684 * @since 4.4.0 685 * 686 * @param string $format The oEmbed response format. Accepts 'json' or 'xml'. 687 * @return string The format, either 'xml' or 'json'. Default 'json'. 688 */ 689 function wp_oembed_ensure_format( $format ) { 690 if ( ! in_array( $format, array( 'json', 'xml' ), true ) ) { 691 return 'json'; 692 } 693 694 return $format; 695 } 696 697 /** 698 * Hooks into the REST API output to print XML instead of JSON. 699 * 700 * This is only done for the oEmbed API endpoint, 701 * which supports both formats. 702 * 703 * @access private 704 * @since 4.4.0 705 * 706 * @param bool $served Whether the request has already been served. 707 * @param WP_HTTP_ResponseInterface $result Result to send to the client. Usually a WP_REST_Response. 708 * @param WP_REST_Request $request Request used to generate the response. 709 * @param WP_REST_Server $server Server instance. 710 * @return true 711 */ 712 function _oembed_rest_pre_serve_request( $served, $result, $request, $server ) { 713 $params = $request->get_params(); 714 715 if ( '/oembed/1.0/embed' !== $request->get_route() || 'GET' !== $request->get_method() ) { 716 return $served; 717 } 718 719 if ( ! isset( $params['format'] ) || 'xml' !== $params['format'] ) { 720 return $served; 721 } 722 723 // Embed links inside the request. 724 $data = $server->response_to_data( $result, false ); 725 726 if ( ! class_exists( 'SimpleXMLElement' ) ) { 727 status_header( 501 ); 728 die( get_status_header_desc( 501 ) ); 729 } 730 731 $result = _oembed_create_xml( $data ); 732 733 // Bail if there's no XML. 734 if ( ! $result ) { 735 status_header( 501 ); 736 return get_status_header_desc( 501 ); 737 } 738 739 if ( ! headers_sent() ) { 740 $server->send_header( 'Content-Type', 'text/xml; charset=' . get_option( 'blog_charset' ) ); 741 } 742 743 echo $result; 744 745 return true; 746 } 747 748 /** 749 * Creates an XML string from a given array. 750 * 751 * @since 4.4.0 752 * @access private 753 * 754 * @param array $data The original oEmbed response data. 755 * @param SimpleXMLElement $node Optional. XML node to append the result to recursively. 756 * @return string|false XML string on success, false on error. 757 */ 758 function _oembed_create_xml( $data, $node = null ) { 759 if ( ! is_array( $data ) || empty( $data ) ) { 760 return false; 761 } 762 763 if ( null === $node ) { 764 $node = new SimpleXMLElement( '<oembed></oembed>' ); 765 } 766 767 foreach ( $data as $key => $value ) { 768 if ( is_numeric( $key ) ) { 769 $key = 'oembed'; 770 } 771 772 if ( is_array( $value ) ) { 773 $item = $node->addChild( $key ); 774 _oembed_create_xml( $value, $item ); 775 } else { 776 $node->addChild( $key, esc_html( $value ) ); 777 } 778 } 779 780 return $node->asXML(); 781 } 782 783 /** 784 * Filters the given oEmbed HTML to make sure iframes have a title attribute. 785 * 786 * @since 5.2.0 787 * 788 * @param string $result The oEmbed HTML result. 789 * @param object $data A data object result from an oEmbed provider. 790 * @param string $url The URL of the content to be embedded. 791 * @return string The filtered oEmbed result. 792 */ 793 function wp_filter_oembed_iframe_title_attribute( $result, $data, $url ) { 794 if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ) ) ) { 795 return $result; 796 } 797 798 $title = ! empty( $data->title ) ? $data->title : ''; 799 800 $pattern = '`<iframe[^>]*?title=(\\\\\'|\\\\"|[\'"])([^>]*?)\1`i'; 801 $has_title_attr = preg_match( $pattern, $result, $matches ); 802 803 if ( $has_title_attr && ! empty( $matches[2] ) ) { 804 $title = $matches[2]; 805 } 806 807 /** 808 * Filters the title attribute of the given oEmbed HTML iframe. 809 * 810 * @since 5.2.0 811 * 812 * @param string $title The title attribute. 813 * @param string $result The oEmbed HTML result. 814 * @param object $data A data object result from an oEmbed provider. 815 * @param string $url The URL of the content to be embedded. 816 */ 817 $title = apply_filters( 'oembed_iframe_title_attribute', $title, $result, $data, $url ); 818 819 if ( '' === $title ) { 820 return $result; 821 } 822 823 if ( $has_title_attr ) { 824 // Remove the old title, $matches[1]: quote, $matches[2]: title attribute value. 825 $result = str_replace( ' title=' . $matches[1] . $matches[2] . $matches[1], '', $result ); 826 } 827 828 return str_ireplace( '<iframe ', sprintf( '<iframe title="%s" ', esc_attr( $title ) ), $result ); 829 } 830 831 832 /** 833 * Filters the given oEmbed HTML. 834 * 835 * If the `$url` isn't on the trusted providers list, 836 * we need to filter the HTML heavily for security. 837 * 838 * Only filters 'rich' and 'video' response types. 839 * 840 * @since 4.4.0 841 * 842 * @param string $result The oEmbed HTML result. 843 * @param object $data A data object result from an oEmbed provider. 844 * @param string $url The URL of the content to be embedded. 845 * @return string The filtered and sanitized oEmbed result. 846 */ 847 function wp_filter_oembed_result( $result, $data, $url ) { 848 if ( false === $result || ! in_array( $data->type, array( 'rich', 'video' ) ) ) { 849 return $result; 850 } 851 852 $wp_oembed = _wp_oembed_get_object(); 853 854 // Don't modify the HTML for trusted providers. 855 if ( false !== $wp_oembed->get_provider( $url, array( 'discover' => false ) ) ) { 856 return $result; 857 } 858 859 $allowed_html = array( 860 'a' => array( 861 'href' => true, 862 ), 863 'blockquote' => array(), 864 'iframe' => array( 865 'src' => true, 866 'width' => true, 867 'height' => true, 868 'frameborder' => true, 869 'marginwidth' => true, 870 'marginheight' => true, 871 'scrolling' => true, 872 'title' => true, 873 ), 874 ); 875 876 $html = wp_kses( $result, $allowed_html ); 877 878 preg_match( '|(<blockquote>.*?</blockquote>)?.*(<iframe.*?></iframe>)|ms', $html, $content ); 879 // We require at least the iframe to exist. 880 if ( empty( $content[2] ) ) { 881 return false; 882 } 883 $html = $content[1] . $content[2]; 884 885 preg_match( '/ src=([\'"])(.*?)\1/', $html, $results ); 886 887 if ( ! empty( $results ) ) { 888 $secret = wp_generate_password( 10, false ); 889 890 $url = esc_url( "{$results[2]}#?secret=$secret" ); 891 $q = $results[1]; 892 893 $html = str_replace( $results[0], ' src=' . $q . $url . $q . ' data-secret=' . $q . $secret . $q, $html ); 894 $html = str_replace( '<blockquote', "<blockquote data-secret=\"$secret\"", $html ); 895 } 896 897 $allowed_html['blockquote']['data-secret'] = true; 898 $allowed_html['iframe']['data-secret'] = true; 899 900 $html = wp_kses( $html, $allowed_html ); 901 902 if ( ! empty( $content[1] ) ) { 903 // We have a blockquote to fall back on. Hide the iframe by default. 904 $html = str_replace( '<iframe', '<iframe style="position: absolute; clip: rect(1px, 1px, 1px, 1px);"', $html ); 905 $html = str_replace( '<blockquote', '<blockquote class="wp-embedded-content"', $html ); 906 } 907 908 $html = str_ireplace( '<iframe', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $html ); 909 910 return $html; 911 } 912 913 /** 914 * Filters the string in the 'more' link displayed after a trimmed excerpt. 915 * 916 * Replaces '[...]' (appended to automatically generated excerpts) with an 917 * ellipsis and a "Continue reading" link in the embed template. 918 * 919 * @since 4.4.0 920 * 921 * @param string $more_string Default 'more' string. 922 * @return string 'Continue reading' link prepended with an ellipsis. 923 */ 924 function wp_embed_excerpt_more( $more_string ) { 925 if ( ! is_embed() ) { 926 return $more_string; 927 } 928 929 $link = sprintf( 930 '<a href="%1$s" class="wp-embed-more" target="_top">%2$s</a>', 931 esc_url( get_permalink() ), 932 /* translators: %s: Post title. */ 933 sprintf( __( 'Continue reading %s' ), '<span class="screen-reader-text">' . get_the_title() . '</span>' ) 934 ); 935 return ' … ' . $link; 936 } 937 938 /** 939 * Displays the post excerpt for the embed template. 940 * 941 * Intended to be used in 'The Loop'. 942 * 943 * @since 4.4.0 944 */ 945 function the_excerpt_embed() { 946 $output = get_the_excerpt(); 947 948 /** 949 * Filters the post excerpt for the embed template. 950 * 951 * @since 4.4.0 952 * 953 * @param string $output The current post excerpt. 954 */ 955 echo apply_filters( 'the_excerpt_embed', $output ); 956 } 957 958 /** 959 * Filters the post excerpt for the embed template. 960 * 961 * Shows players for video and audio attachments. 962 * 963 * @since 4.4.0 964 * 965 * @param string $content The current post excerpt. 966 * @return string The modified post excerpt. 967 */ 968 function wp_embed_excerpt_attachment( $content ) { 969 if ( is_attachment() ) { 970 return prepend_attachment( '' ); 971 } 972 973 return $content; 974 } 975 976 /** 977 * Enqueue embed iframe default CSS and JS & fire do_action('enqueue_embed_scripts') 978 * 979 * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE. 980 * 981 * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script(). 982 * Runs first in oembed_head(). 983 * 984 * @since 4.4.0 985 */ 986 function enqueue_embed_scripts() { 987 wp_enqueue_style( 'wp-embed-template-ie' ); 988 989 /** 990 * Fires when scripts and styles are enqueued for the embed iframe. 991 * 992 * @since 4.4.0 993 */ 994 do_action( 'enqueue_embed_scripts' ); 995 } 996 997 /** 998 * Prints the CSS in the embed iframe header. 999 * 1000 * @since 4.4.0 1001 */ 1002 function print_embed_styles() { 1003 $type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"'; 1004 ?> 1005 <style<?php echo $type_attr; ?>> 1006 <?php 1007 if ( SCRIPT_DEBUG ) { 1008 readfile( ABSPATH . WPINC . '/css/wp-embed-template.css' ); 1009 } else { 1010 /* 1011 * If you're looking at a src version of this file, you'll see an "include" 1012 * statement below. This is used by the `npm run build` process to directly 1013 * include a minified version of wp-oembed-embed.css, instead of using the 1014 * readfile() method from above. 1015 * 1016 * If you're looking at a build version of this file, you'll see a string of 1017 * minified CSS. If you need to debug it, please turn on SCRIPT_DEBUG 1018 * and edit wp-embed-template.css directly. 1019 */ 1020 ?> 1021 /*! 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0;padding:0 11px 0 0;border-left:none;border-right:1px solid #aaa} 1023 <?php 1024 } 1025 ?> 1026 </style> 1027 <?php 1028 } 1029 1030 /** 1031 * Prints the JavaScript in the embed iframe header. 1032 * 1033 * @since 4.4.0 1034 */ 1035 function print_embed_scripts() { 1036 $type_attr = current_theme_supports( 'html5', 'script' ) ? '' : ' type="text/javascript"'; 1037 ?> 1038 <script<?php echo $type_attr; ?>> 1039 <?php 1040 if ( SCRIPT_DEBUG ) { 1041 readfile( ABSPATH . WPINC . '/js/wp-embed-template.js' ); 1042 } else { 1043 /* 1044 * If you're looking at a src version of this file, you'll see an "include" 1045 * statement below. This is used by the `npm run build` process to directly 1046 * include a minified version of wp-embed-template.js, instead of using the 1047 * readfile() method from above. 1048 * 1049 * If you're looking at a build version of this file, you'll see a string of 1050 * minified JavaScript. If you need to debug it, please turn on SCRIPT_DEBUG 1051 * and edit wp-embed-template.js directly. 1052 */ 1053 ?> 1054 !function(a,b){"use strict";function c(b,c){a.parent.postMessage({message:b,value:c,secret:g},"*")}function d(){function d(){l.className=l.className.replace("hidden",""),b.querySelector('.wp-embed-share-tab-button [aria-selected="true"]').focus()}function e(){l.className+=" hidden",b.querySelector(".wp-embed-share-dialog-open").focus()}function f(a){var c=b.querySelector('.wp-embed-share-tab-button [aria-selected="true"]');c.setAttribute("aria-selected","false"),b.querySelector("#"+c.getAttribute("aria-controls")).setAttribute("aria-hidden","true"),a.target.setAttribute("aria-selected","true"),b.querySelector("#"+a.target.getAttribute("aria-controls")).setAttribute("aria-hidden","false")}function g(a){var c,d,e=a.target,f=e.parentElement.previousElementSibling,g=e.parentElement.nextElementSibling;if(37===a.keyCode)c=f;else{if(39!==a.keyCode)return!1;c=g}"rtl"===b.documentElement.getAttribute("dir")&&(c=c===f?g:f),c&&(d=c.firstElementChild,e.setAttribute("tabindex","-1"),e.setAttribute("aria-selected",!1),b.querySelector("#"+e.getAttribute("aria-controls")).setAttribute("aria-hidden","true"),d.setAttribute("tabindex","0"),d.setAttribute("aria-selected","true"),d.focus(),b.querySelector("#"+d.getAttribute("aria-controls")).setAttribute("aria-hidden","false"))}function h(a){var c=b.querySelector('.wp-embed-share-tab-button [aria-selected="true"]');n!==a.target||a.shiftKey?c===a.target&&a.shiftKey&&(n.focus(),a.preventDefault()):(c.focus(),a.preventDefault())}function i(a){var b,d=a.target;b=d.hasAttribute("href")?d.getAttribute("href"):d.parentElement.getAttribute("href"),b&&(c("link",b),a.preventDefault())}if(!k){k=!0;var j,l=b.querySelector(".wp-embed-share-dialog"),m=b.querySelector(".wp-embed-share-dialog-open"),n=b.querySelector(".wp-embed-share-dialog-close"),o=b.querySelectorAll(".wp-embed-share-input"),p=b.querySelectorAll(".wp-embed-share-tab-button button"),q=b.querySelector(".wp-embed-featured-image img");if(o)for(j=0;j<o.length;j++)o[j].addEventListener("click",function(a){a.target.select()});if(m&&m.addEventListener("click",function(){d()}),n&&n.addEventListener("click",function(){e()}),p)for(j=0;j<p.length;j++)p[j].addEventListener("click",f),p[j].addEventListener("keydown",g);b.addEventListener("keydown",function(a){27===a.keyCode&&-1===l.className.indexOf("hidden")?e():9===a.keyCode&&h(a)},!1),a.self!==a.top&&(c("height",Math.ceil(b.body.getBoundingClientRect().height)),q&&q.addEventListener("load",function(){c("height",Math.ceil(b.body.getBoundingClientRect().height))}),b.addEventListener("click",i))}}function e(){a.self!==a.top&&(clearTimeout(i),i=setTimeout(function(){c("height",Math.ceil(b.body.getBoundingClientRect().height))},100))}function f(){a.self===a.top||g||(g=a.location.hash.replace(/.*secret=([\d\w]{10}).*/,"$1"),clearTimeout(h),h=setTimeout(function(){f()},100))}var g,h,i,j=b.querySelector&&a.addEventListener,k=!1;j&&(f(),b.documentElement.className=b.documentElement.className.replace(/\bno-js\b/,"")+" js",b.addEventListener("DOMContentLoaded",d,!1),a.addEventListener("load",d,!1),a.addEventListener("resize",e,!1))}(window,document); 1055 <?php 1056 } 1057 ?> 1058 </script> 1059 <?php 1060 } 1061 1062 /** 1063 * Prepare the oembed HTML to be displayed in an RSS feed. 1064 * 1065 * @since 4.4.0 1066 * @access private 1067 * 1068 * @param string $content The content to filter. 1069 * @return string The filtered content. 1070 */ 1071 function _oembed_filter_feed_content( $content ) { 1072 return str_replace( '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);"', '<iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted"', $content ); 1073 } 1074 1075 /** 1076 * Prints the necessary markup for the embed comments button. 1077 * 1078 * @since 4.4.0 1079 */ 1080 function print_embed_comments_button() { 1081 if ( is_404() || ! ( get_comments_number() || comments_open() ) ) { 1082 return; 1083 } 1084 ?> 1085 <div class="wp-embed-comments"> 1086 <a href="<?php comments_link(); ?>" target="_top"> 1087 <span class="dashicons dashicons-admin-comments"></span> 1088 <?php 1089 printf( 1090 /* translators: %s: Number of comments. */ 1091 _n( 1092 '%s <span class="screen-reader-text">Comment</span>', 1093 '%s <span class="screen-reader-text">Comments</span>', 1094 get_comments_number() 1095 ), 1096 number_format_i18n( get_comments_number() ) 1097 ); 1098 ?> 1099 </a> 1100 </div> 1101 <?php 1102 } 1103 1104 /** 1105 * Prints the necessary markup for the embed sharing button. 1106 * 1107 * @since 4.4.0 1108 */ 1109 function print_embed_sharing_button() { 1110 if ( is_404() ) { 1111 return; 1112 } 1113 ?> 1114 <div class="wp-embed-share"> 1115 <button type="button" class="wp-embed-share-dialog-open" aria-label="<?php esc_attr_e( 'Open sharing dialog' ); ?>"> 1116 <span class="dashicons dashicons-share"></span> 1117 </button> 1118 </div> 1119 <?php 1120 } 1121 1122 /** 1123 * Prints the necessary markup for the embed sharing dialog. 1124 * 1125 * @since 4.4.0 1126 */ 1127 function print_embed_sharing_dialog() { 1128 if ( is_404() ) { 1129 return; 1130 } 1131 ?> 1132 <div class="wp-embed-share-dialog hidden" role="dialog" aria-label="<?php esc_attr_e( 'Sharing options' ); ?>"> 1133 <div class="wp-embed-share-dialog-content"> 1134 <div class="wp-embed-share-dialog-text"> 1135 <ul class="wp-embed-share-tabs" role="tablist"> 1136 <li class="wp-embed-share-tab-button wp-embed-share-tab-button-wordpress" role="presentation"> 1137 <button type="button" role="tab" aria-controls="wp-embed-share-tab-wordpress" aria-selected="true" tabindex="0"><?php esc_html_e( 'WordPress Embed' ); ?></button> 1138 </li> 1139 <li class="wp-embed-share-tab-button wp-embed-share-tab-button-html" role="presentation"> 1140 <button type="button" role="tab" aria-controls="wp-embed-share-tab-html" aria-selected="false" tabindex="-1"><?php esc_html_e( 'HTML Embed' ); ?></button> 1141 </li> 1142 </ul> 1143 <div id="wp-embed-share-tab-wordpress" class="wp-embed-share-tab" role="tabpanel" aria-hidden="false"> 1144 <input type="text" value="<?php the_permalink(); ?>" class="wp-embed-share-input" aria-describedby="wp-embed-share-description-wordpress" tabindex="0" readonly/> 1145 1146 <p class="wp-embed-share-description" id="wp-embed-share-description-wordpress"> 1147 <?php _e( 'Copy and paste this URL into your WordPress site to embed' ); ?> 1148 </p> 1149 </div> 1150 <div id="wp-embed-share-tab-html" class="wp-embed-share-tab" role="tabpanel" aria-hidden="true"> 1151 <textarea class="wp-embed-share-input" aria-describedby="wp-embed-share-description-html" tabindex="0" readonly><?php echo esc_textarea( get_post_embed_html( 600, 400 ) ); ?></textarea> 1152 1153 <p class="wp-embed-share-description" id="wp-embed-share-description-html"> 1154 <?php _e( 'Copy and paste this code into your site to embed' ); ?> 1155 </p> 1156 </div> 1157 </div> 1158 1159 <button type="button" class="wp-embed-share-dialog-close" aria-label="<?php esc_attr_e( 'Close sharing dialog' ); ?>"> 1160 <span class="dashicons dashicons-no"></span> 1161 </button> 1162 </div> 1163 </div> 1164 <?php 1165 } 1166 1167 /** 1168 * Prints the necessary markup for the site title in an embed template. 1169 * 1170 * @since 4.5.0 1171 */ 1172 function the_embed_site_title() { 1173 $site_title = sprintf( 1174 '<a href="%s" target="_top"><img src="%s" srcset="%s 2x" width="32" height="32" alt="" class="wp-embed-site-icon"/><span>%s</span></a>', 1175 esc_url( home_url() ), 1176 esc_url( get_site_icon_url( 32, admin_url( 'images/w-logo-blue.png' ) ) ), 1177 esc_url( get_site_icon_url( 64, admin_url( 'images/w-logo-blue.png' ) ) ), 1178 esc_html( get_bloginfo( 'name' ) ) 1179 ); 1180 1181 $site_title = '<div class="wp-embed-site-title">' . $site_title . '</div>'; 1182 1183 /** 1184 * Filters the site title HTML in the embed footer. 1185 * 1186 * @since 4.4.0 1187 * 1188 * @param string $site_title The site title HTML. 1189 */ 1190 echo apply_filters( 'embed_site_title_html', $site_title ); 1191 } 1192 1193 /** 1194 * Filters the oEmbed result before any HTTP requests are made. 1195 * 1196 * If the URL belongs to the current site, the result is fetched directly instead of 1197 * going through the oEmbed discovery process. 1198 * 1199 * @since 4.5.3 1200 * 1201 * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null. 1202 * @param string $url The URL that should be inspected for discovery `<link>` tags. 1203 * @param array $args oEmbed remote get arguments. 1204 * @return null|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. 1205 * Null if the URL does not belong to the current site. 1206 */ 1207 function wp_filter_pre_oembed_result( $result, $url, $args ) { 1208 $data = get_oembed_response_data_for_url( $url, $args ); 1209 1210 if ( $data ) { 1211 return _wp_oembed_get_object()->data2html( $data, $url ); 1212 } 1213 1214 return $result; 1215 }
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| Generated: Sat Sep 21 01:00:03 2019 | Cross-referenced by PHPXref 0.7.1 |