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1 <?php 2 /** 3 * REST API: WP_REST_Server class 4 * 5 * @package WordPress 6 * @subpackage REST_API 7 * @since 4.4.0 8 */ 9 10 /** 11 * Core class used to implement the WordPress REST API server. 12 * 13 * @since 4.4.0 14 */ 15 #[AllowDynamicProperties] 16 class WP_REST_Server { 17 18 /** 19 * Alias for GET transport method. 20 * 21 * @since 4.4.0 22 * @var string 23 */ 24 const READABLE = 'GET'; 25 26 /** 27 * Alias for POST transport method. 28 * 29 * @since 4.4.0 30 * @var string 31 */ 32 const CREATABLE = 'POST'; 33 34 /** 35 * Alias for POST, PUT, PATCH transport methods together. 36 * 37 * @since 4.4.0 38 * @var string 39 */ 40 const EDITABLE = 'POST, PUT, PATCH'; 41 42 /** 43 * Alias for DELETE transport method. 44 * 45 * @since 4.4.0 46 * @var string 47 */ 48 const DELETABLE = 'DELETE'; 49 50 /** 51 * Alias for GET, POST, PUT, PATCH & DELETE transport methods together. 52 * 53 * @since 4.4.0 54 * @var string 55 */ 56 const ALLMETHODS = 'GET, POST, PUT, PATCH, DELETE'; 57 58 /** 59 * Namespaces registered to the server. 60 * 61 * @since 4.4.0 62 * @var array 63 */ 64 protected $namespaces = array(); 65 66 /** 67 * Endpoints registered to the server. 68 * 69 * @since 4.4.0 70 * @var array 71 */ 72 protected $endpoints = array(); 73 74 /** 75 * Options defined for the routes. 76 * 77 * @since 4.4.0 78 * @var array 79 */ 80 protected $route_options = array(); 81 82 /** 83 * Caches embedded requests. 84 * 85 * @since 5.4.0 86 * @var array 87 */ 88 protected $embed_cache = array(); 89 90 /** 91 * Stores request objects that are currently being handled. 92 * 93 * @since 6.5.0 94 * @var array 95 */ 96 protected $dispatching_requests = array(); 97 98 /** 99 * Instantiates the REST server. 100 * 101 * @since 4.4.0 102 */ 103 public function __construct() { 104 $this->endpoints = array( 105 // Meta endpoints. 106 '/' => array( 107 'callback' => array( $this, 'get_index' ), 108 'methods' => 'GET', 109 'args' => array( 110 'context' => array( 111 'default' => 'view', 112 ), 113 ), 114 ), 115 '/batch/v1' => array( 116 'callback' => array( $this, 'serve_batch_request_v1' ), 117 'methods' => 'POST', 118 'args' => array( 119 'validation' => array( 120 'type' => 'string', 121 'enum' => array( 'require-all-validate', 'normal' ), 122 'default' => 'normal', 123 ), 124 'requests' => array( 125 'required' => true, 126 'type' => 'array', 127 'maxItems' => $this->get_max_batch_size(), 128 'items' => array( 129 'type' => 'object', 130 'properties' => array( 131 'method' => array( 132 'type' => 'string', 133 'enum' => array( 'POST', 'PUT', 'PATCH', 'DELETE' ), 134 'default' => 'POST', 135 ), 136 'path' => array( 137 'type' => 'string', 138 'required' => true, 139 ), 140 'body' => array( 141 'type' => 'object', 142 'properties' => array(), 143 'additionalProperties' => true, 144 ), 145 'headers' => array( 146 'type' => 'object', 147 'properties' => array(), 148 'additionalProperties' => array( 149 'type' => array( 'string', 'array' ), 150 'items' => array( 151 'type' => 'string', 152 ), 153 ), 154 ), 155 ), 156 ), 157 ), 158 ), 159 ), 160 ); 161 } 162 163 164 /** 165 * Checks the authentication headers if supplied. 166 * 167 * @since 4.4.0 168 * 169 * @return WP_Error|null|true WP_Error indicates unsuccessful login, null indicates successful 170 * or no authentication provided 171 */ 172 public function check_authentication() { 173 /** 174 * Filters REST API authentication errors. 175 * 176 * This is used to pass a WP_Error from an authentication method back to 177 * the API. 178 * 179 * Authentication methods should check first if they're being used, as 180 * multiple authentication methods can be enabled on a site (cookies, 181 * HTTP basic auth, OAuth). If the authentication method hooked in is 182 * not actually being attempted, null should be returned to indicate 183 * another authentication method should check instead. Similarly, 184 * callbacks should ensure the value is `null` before checking for 185 * errors. 186 * 187 * A WP_Error instance can be returned if an error occurs, and this should 188 * match the format used by API methods internally (that is, the `status` 189 * data should be used). A callback can return `true` to indicate that 190 * the authentication method was used, and it succeeded. 191 * 192 * @since 4.4.0 193 * 194 * @param WP_Error|null|true $errors WP_Error if authentication error, null if authentication 195 * method wasn't used, true if authentication succeeded. 196 */ 197 return apply_filters( 'rest_authentication_errors', null ); 198 } 199 200 /** 201 * Converts an error to a response object. 202 * 203 * This iterates over all error codes and messages to change it into a flat 204 * array. This enables simpler client behavior, as it is represented as a 205 * list in JSON rather than an object/map. 206 * 207 * @since 4.4.0 208 * @since 5.7.0 Converted to a wrapper of {@see rest_convert_error_to_response()}. 209 * 210 * @param WP_Error $error WP_Error instance. 211 * @return WP_REST_Response List of associative arrays with code and message keys. 212 */ 213 protected function error_to_response( $error ) { 214 return rest_convert_error_to_response( $error ); 215 } 216 217 /** 218 * Retrieves an appropriate error representation in JSON. 219 * 220 * Note: This should only be used in WP_REST_Server::serve_request(), as it 221 * cannot handle WP_Error internally. All callbacks and other internal methods 222 * should instead return a WP_Error with the data set to an array that includes 223 * a 'status' key, with the value being the HTTP status to send. 224 * 225 * @since 4.4.0 226 * 227 * @param string $code WP_Error-style code. 228 * @param string $message Human-readable message. 229 * @param int $status Optional. HTTP status code to send. Default null. 230 * @return string JSON representation of the error 231 */ 232 protected function json_error( $code, $message, $status = null ) { 233 if ( $status ) { 234 $this->set_status( $status ); 235 } 236 237 $error = compact( 'code', 'message' ); 238 239 return wp_json_encode( $error ); 240 } 241 242 /** 243 * Gets the encoding options passed to {@see wp_json_encode}. 244 * 245 * @since 6.1.0 246 * 247 * @param \WP_REST_Request $request The current request object. 248 * 249 * @return int The JSON encode options. 250 */ 251 protected function get_json_encode_options( WP_REST_Request $request ) { 252 $options = 0; 253 254 if ( $request->has_param( '_pretty' ) ) { 255 $options |= JSON_PRETTY_PRINT; 256 } 257 258 /** 259 * Filters the JSON encoding options used to send the REST API response. 260 * 261 * @since 6.1.0 262 * 263 * @param int $options JSON encoding options {@see json_encode()}. 264 * @param WP_REST_Request $request Current request object. 265 */ 266 return apply_filters( 'rest_json_encode_options', $options, $request ); 267 } 268 269 /** 270 * Handles serving a REST API request. 271 * 272 * Matches the current server URI to a route and runs the first matching 273 * callback then outputs a JSON representation of the returned value. 274 * 275 * @since 4.4.0 276 * 277 * @see WP_REST_Server::dispatch() 278 * 279 * @global WP_User $current_user The currently authenticated user. 280 * 281 * @param string $path Optional. The request route. If not set, `$_SERVER['PATH_INFO']` will be used. 282 * Default null. 283 * @return null|false Null if not served and a HEAD request, false otherwise. 284 */ 285 public function serve_request( $path = null ) { 286 /* @var WP_User|null $current_user */ 287 global $current_user; 288 289 if ( $current_user instanceof WP_User && ! $current_user->exists() ) { 290 /* 291 * If there is no current user authenticated via other means, clear 292 * the cached lack of user, so that an authenticate check can set it 293 * properly. 294 * 295 * This is done because for authentications such as Application 296 * Passwords, we don't want it to be accepted unless the current HTTP 297 * request is a REST API request, which can't always be identified early 298 * enough in evaluation. 299 */ 300 $current_user = null; 301 } 302 303 /** 304 * Filters whether JSONP is enabled for the REST API. 305 * 306 * @since 4.4.0 307 * 308 * @param bool $jsonp_enabled Whether JSONP is enabled. Default true. 309 */ 310 $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); 311 312 $jsonp_callback = false; 313 if ( isset( $_GET['_jsonp'] ) ) { 314 $jsonp_callback = $_GET['_jsonp']; 315 } 316 317 $content_type = ( $jsonp_callback && $jsonp_enabled ) ? 'application/javascript' : 'application/json'; 318 $this->send_header( 'Content-Type', $content_type . '; charset=' . get_option( 'blog_charset' ) ); 319 $this->send_header( 'X-Robots-Tag', 'noindex' ); 320 321 $api_root = get_rest_url(); 322 if ( ! empty( $api_root ) ) { 323 $this->send_header( 'Link', '<' . sanitize_url( $api_root ) . '>; rel="https://api.w.org/"' ); 324 } 325 326 /* 327 * Mitigate possible JSONP Flash attacks. 328 * 329 * https://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/ 330 */ 331 $this->send_header( 'X-Content-Type-Options', 'nosniff' ); 332 333 /** 334 * Filters whether the REST API is enabled. 335 * 336 * @since 4.4.0 337 * @deprecated 4.7.0 Use the {@see 'rest_authentication_errors'} filter to 338 * restrict access to the REST API. 339 * 340 * @param bool $rest_enabled Whether the REST API is enabled. Default true. 341 */ 342 apply_filters_deprecated( 343 'rest_enabled', 344 array( true ), 345 '4.7.0', 346 'rest_authentication_errors', 347 sprintf( 348 /* translators: %s: rest_authentication_errors */ 349 __( 'The REST API can no longer be completely disabled, the %s filter can be used to restrict access to the API, instead.' ), 350 'rest_authentication_errors' 351 ) 352 ); 353 354 if ( $jsonp_callback ) { 355 if ( ! $jsonp_enabled ) { 356 echo $this->json_error( 'rest_callback_disabled', __( 'JSONP support is disabled on this site.' ), 400 ); 357 return false; 358 } 359 360 if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { 361 echo $this->json_error( 'rest_callback_invalid', __( 'Invalid JSONP callback function.' ), 400 ); 362 return false; 363 } 364 } 365 366 if ( empty( $path ) ) { 367 if ( isset( $_SERVER['PATH_INFO'] ) ) { 368 $path = $_SERVER['PATH_INFO']; 369 } else { 370 $path = '/'; 371 } 372 } 373 374 $request = new WP_REST_Request( $_SERVER['REQUEST_METHOD'], $path ); 375 376 $request->set_query_params( wp_unslash( $_GET ) ); 377 $request->set_body_params( wp_unslash( $_POST ) ); 378 $request->set_file_params( $_FILES ); 379 $request->set_headers( $this->get_headers( wp_unslash( $_SERVER ) ) ); 380 $request->set_body( self::get_raw_data() ); 381 382 /* 383 * HTTP method override for clients that can't use PUT/PATCH/DELETE. First, we check 384 * $_GET['_method']. If that is not set, we check for the HTTP_X_HTTP_METHOD_OVERRIDE 385 * header. 386 */ 387 $method_overridden = false; 388 if ( isset( $_GET['_method'] ) ) { 389 $request->set_method( $_GET['_method'] ); 390 } elseif ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) { 391 $request->set_method( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ); 392 $method_overridden = true; 393 } 394 395 $expose_headers = array( 'X-WP-Total', 'X-WP-TotalPages', 'Link' ); 396 397 /** 398 * Filters the list of response headers that are exposed to REST API CORS requests. 399 * 400 * @since 5.5.0 401 * @since 6.3.0 The `$request` parameter was added. 402 * 403 * @param string[] $expose_headers The list of response headers to expose. 404 * @param WP_REST_Request $request The request in context. 405 */ 406 $expose_headers = apply_filters( 'rest_exposed_cors_headers', $expose_headers, $request ); 407 408 $this->send_header( 'Access-Control-Expose-Headers', implode( ', ', $expose_headers ) ); 409 410 $allow_headers = array( 411 'Authorization', 412 'X-WP-Nonce', 413 'Content-Disposition', 414 'Content-MD5', 415 'Content-Type', 416 ); 417 418 /** 419 * Filters the list of request headers that are allowed for REST API CORS requests. 420 * 421 * The allowed headers are passed to the browser to specify which 422 * headers can be passed to the REST API. By default, we allow the 423 * Content-* headers needed to upload files to the media endpoints. 424 * As well as the Authorization and Nonce headers for allowing authentication. 425 * 426 * @since 5.5.0 427 * @since 6.3.0 The `$request` parameter was added. 428 * 429 * @param string[] $allow_headers The list of request headers to allow. 430 * @param WP_REST_Request $request The request in context. 431 */ 432 $allow_headers = apply_filters( 'rest_allowed_cors_headers', $allow_headers, $request ); 433 434 $this->send_header( 'Access-Control-Allow-Headers', implode( ', ', $allow_headers ) ); 435 436 $result = $this->check_authentication(); 437 438 if ( ! is_wp_error( $result ) ) { 439 $result = $this->dispatch( $request ); 440 } 441 442 // Normalize to either WP_Error or WP_REST_Response... 443 $result = rest_ensure_response( $result ); 444 445 // ...then convert WP_Error across. 446 if ( is_wp_error( $result ) ) { 447 $result = $this->error_to_response( $result ); 448 } 449 450 /** 451 * Filters the REST API response. 452 * 453 * Allows modification of the response before returning. 454 * 455 * @since 4.4.0 456 * @since 4.5.0 Applied to embedded responses. 457 * 458 * @param WP_HTTP_Response $result Result to send to the client. Usually a `WP_REST_Response`. 459 * @param WP_REST_Server $server Server instance. 460 * @param WP_REST_Request $request Request used to generate the response. 461 */ 462 $result = apply_filters( 'rest_post_dispatch', rest_ensure_response( $result ), $this, $request ); 463 464 // Wrap the response in an envelope if asked for. 465 if ( isset( $_GET['_envelope'] ) ) { 466 $embed = isset( $_GET['_embed'] ) ? rest_parse_embed_param( $_GET['_embed'] ) : false; 467 $result = $this->envelope_response( $result, $embed ); 468 } 469 470 // Send extra data from response objects. 471 $headers = $result->get_headers(); 472 $this->send_headers( $headers ); 473 474 $code = $result->get_status(); 475 $this->set_status( $code ); 476 477 /** 478 * Filters whether to send no-cache headers on a REST API request. 479 * 480 * @since 4.4.0 481 * @since 6.3.2 Moved the block to catch the filter added on rest_cookie_check_errors() from wp-includes/rest-api.php. 482 * 483 * @param bool $rest_send_nocache_headers Whether to send no-cache headers. 484 */ 485 $send_no_cache_headers = apply_filters( 'rest_send_nocache_headers', is_user_logged_in() ); 486 487 /* 488 * Send no-cache headers if $send_no_cache_headers is true, 489 * OR if the HTTP_X_HTTP_METHOD_OVERRIDE is used but resulted a 4xx response code. 490 */ 491 if ( $send_no_cache_headers || ( true === $method_overridden && str_starts_with( $code, '4' ) ) ) { 492 foreach ( wp_get_nocache_headers() as $header => $header_value ) { 493 if ( empty( $header_value ) ) { 494 $this->remove_header( $header ); 495 } else { 496 $this->send_header( $header, $header_value ); 497 } 498 } 499 } 500 501 /** 502 * Filters whether the REST API request has already been served. 503 * 504 * Allow sending the request manually - by returning true, the API result 505 * will not be sent to the client. 506 * 507 * @since 4.4.0 508 * 509 * @param bool $served Whether the request has already been served. 510 * Default false. 511 * @param WP_HTTP_Response $result Result to send to the client. Usually a `WP_REST_Response`. 512 * @param WP_REST_Request $request Request used to generate the response. 513 * @param WP_REST_Server $server Server instance. 514 */ 515 $served = apply_filters( 'rest_pre_serve_request', false, $result, $request, $this ); 516 517 if ( ! $served ) { 518 if ( 'HEAD' === $request->get_method() ) { 519 return null; 520 } 521 522 // Embed links inside the request. 523 $embed = isset( $_GET['_embed'] ) ? rest_parse_embed_param( $_GET['_embed'] ) : false; 524 $result = $this->response_to_data( $result, $embed ); 525 526 /** 527 * Filters the REST API response. 528 * 529 * Allows modification of the response data after inserting 530 * embedded data (if any) and before echoing the response data. 531 * 532 * @since 4.8.1 533 * 534 * @param array $result Response data to send to the client. 535 * @param WP_REST_Server $server Server instance. 536 * @param WP_REST_Request $request Request used to generate the response. 537 */ 538 $result = apply_filters( 'rest_pre_echo_response', $result, $this, $request ); 539 540 // The 204 response shouldn't have a body. 541 if ( 204 === $code || null === $result ) { 542 return null; 543 } 544 545 $result = wp_json_encode( $result, $this->get_json_encode_options( $request ) ); 546 547 $json_error_message = $this->get_json_last_error(); 548 549 if ( $json_error_message ) { 550 $this->set_status( 500 ); 551 $json_error_obj = new WP_Error( 552 'rest_encode_error', 553 $json_error_message, 554 array( 'status' => 500 ) 555 ); 556 557 $result = $this->error_to_response( $json_error_obj ); 558 $result = wp_json_encode( $result->data, $this->get_json_encode_options( $request ) ); 559 } 560 561 if ( $jsonp_callback ) { 562 // Prepend '/**/' to mitigate possible JSONP Flash attacks. 563 // https://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/ 564 echo '/**/' . $jsonp_callback . '(' . $result . ')'; 565 } else { 566 echo $result; 567 } 568 } 569 570 return null; 571 } 572 573 /** 574 * Converts a response to data to send. 575 * 576 * @since 4.4.0 577 * @since 5.4.0 The `$embed` parameter can now contain a list of link relations to include. 578 * 579 * @param WP_REST_Response $response Response object. 580 * @param bool|string[] $embed Whether to embed all links, a filtered list of link relations, or no links. 581 * @return array { 582 * Data with sub-requests embedded. 583 * 584 * @type array $_links Links. 585 * @type array $_embedded Embedded objects. 586 * } 587 */ 588 public function response_to_data( $response, $embed ) { 589 $data = $response->get_data(); 590 $links = self::get_compact_response_links( $response ); 591 592 if ( ! empty( $links ) ) { 593 // Convert links to part of the data. 594 $data['_links'] = $links; 595 } 596 597 if ( $embed ) { 598 $this->embed_cache = array(); 599 // Determine if this is a numeric array. 600 if ( wp_is_numeric_array( $data ) ) { 601 foreach ( $data as $key => $item ) { 602 $data[ $key ] = $this->embed_links( $item, $embed ); 603 } 604 } else { 605 $data = $this->embed_links( $data, $embed ); 606 } 607 $this->embed_cache = array(); 608 } 609 610 return $data; 611 } 612 613 /** 614 * Retrieves links from a response. 615 * 616 * Extracts the links from a response into a structured hash, suitable for 617 * direct output. 618 * 619 * @since 4.4.0 620 * 621 * @param WP_REST_Response $response Response to extract links from. 622 * @return array Map of link relation to list of link hashes. 623 */ 624 public static function get_response_links( $response ) { 625 $links = $response->get_links(); 626 627 if ( empty( $links ) ) { 628 return array(); 629 } 630 631 // Convert links to part of the data. 632 $data = array(); 633 foreach ( $links as $rel => $items ) { 634 $data[ $rel ] = array(); 635 636 foreach ( $items as $item ) { 637 $attributes = $item['attributes']; 638 $attributes['href'] = $item['href']; 639 640 if ( 'self' !== $rel ) { 641 $data[ $rel ][] = $attributes; 642 continue; 643 } 644 645 $target_hints = self::get_target_hints_for_link( $attributes ); 646 if ( $target_hints ) { 647 $attributes['targetHints'] = $target_hints; 648 } 649 650 $data[ $rel ][] = $attributes; 651 } 652 } 653 654 return $data; 655 } 656 657 /** 658 * Gets the target links for a REST API Link. 659 * 660 * @since 6.7.0 661 * 662 * @param array $link 663 * 664 * @return array|null 665 */ 666 protected static function get_target_hints_for_link( $link ) { 667 // Prefer targetHints that were specifically designated by the developer. 668 if ( isset( $link['targetHints']['allow'] ) ) { 669 return null; 670 } 671 672 $request = WP_REST_Request::from_url( $link['href'] ); 673 if ( ! $request ) { 674 return null; 675 } 676 677 $server = rest_get_server(); 678 $match = $server->match_request_to_handler( $request ); 679 680 if ( is_wp_error( $match ) ) { 681 return null; 682 } 683 684 if ( is_wp_error( $request->has_valid_params() ) ) { 685 return null; 686 } 687 688 if ( is_wp_error( $request->sanitize_params() ) ) { 689 return null; 690 } 691 692 $target_hints = array(); 693 694 $response = new WP_REST_Response(); 695 $response->set_matched_route( $match[0] ); 696 $response->set_matched_handler( $match[1] ); 697 $headers = rest_send_allow_header( $response, $server, $request )->get_headers(); 698 699 foreach ( $headers as $name => $value ) { 700 $name = WP_REST_Request::canonicalize_header_name( $name ); 701 702 $target_hints[ $name ] = array_map( 'trim', explode( ',', $value ) ); 703 } 704 705 return $target_hints; 706 } 707 708 /** 709 * Retrieves the CURIEs (compact URIs) used for relations. 710 * 711 * Extracts the links from a response into a structured hash, suitable for 712 * direct output. 713 * 714 * @since 4.5.0 715 * 716 * @param WP_REST_Response $response Response to extract links from. 717 * @return array Map of link relation to list of link hashes. 718 */ 719 public static function get_compact_response_links( $response ) { 720 $links = self::get_response_links( $response ); 721 722 if ( empty( $links ) ) { 723 return array(); 724 } 725 726 $curies = $response->get_curies(); 727 $used_curies = array(); 728 729 foreach ( $links as $rel => $items ) { 730 731 // Convert $rel URIs to their compact versions if they exist. 732 foreach ( $curies as $curie ) { 733 $href_prefix = substr( $curie['href'], 0, strpos( $curie['href'], '{rel}' ) ); 734 if ( ! str_starts_with( $rel, $href_prefix ) ) { 735 continue; 736 } 737 738 // Relation now changes from '$uri' to '$curie:$relation'. 739 $rel_regex = str_replace( '\{rel\}', '(.+)', preg_quote( $curie['href'], '!' ) ); 740 preg_match( '!' . $rel_regex . '!', $rel, $matches ); 741 if ( $matches ) { 742 $new_rel = $curie['name'] . ':' . $matches[1]; 743 $used_curies[ $curie['name'] ] = $curie; 744 $links[ $new_rel ] = $items; 745 unset( $links[ $rel ] ); 746 break; 747 } 748 } 749 } 750 751 // Push the curies onto the start of the links array. 752 if ( $used_curies ) { 753 $links['curies'] = array_values( $used_curies ); 754 } 755 756 return $links; 757 } 758 759 /** 760 * Embeds the links from the data into the request. 761 * 762 * @since 4.4.0 763 * @since 5.4.0 The `$embed` parameter can now contain a list of link relations to include. 764 * 765 * @param array $data Data from the request. 766 * @param bool|string[] $embed Whether to embed all links or a filtered list of link relations. 767 * @return array { 768 * Data with sub-requests embedded. 769 * 770 * @type array $_links Links. 771 * @type array $_embedded Embedded objects. 772 * } 773 */ 774 protected function embed_links( $data, $embed = true ) { 775 if ( empty( $data['_links'] ) ) { 776 return $data; 777 } 778 779 $embedded = array(); 780 781 foreach ( $data['_links'] as $rel => $links ) { 782 /* 783 * If a list of relations was specified, and the link relation 784 * is not in the list of allowed relations, don't process the link. 785 */ 786 if ( is_array( $embed ) && ! in_array( $rel, $embed, true ) ) { 787 continue; 788 } 789 790 $embeds = array(); 791 792 foreach ( $links as $item ) { 793 // Determine if the link is embeddable. 794 if ( empty( $item['embeddable'] ) ) { 795 // Ensure we keep the same order. 796 $embeds[] = array(); 797 continue; 798 } 799 800 if ( ! array_key_exists( $item['href'], $this->embed_cache ) ) { 801 // Run through our internal routing and serve. 802 $request = WP_REST_Request::from_url( $item['href'] ); 803 if ( ! $request ) { 804 $embeds[] = array(); 805 continue; 806 } 807 808 // Embedded resources get passed context=embed. 809 if ( empty( $request['context'] ) ) { 810 $request['context'] = 'embed'; 811 } 812 813 if ( empty( $request['per_page'] ) ) { 814 $matched = $this->match_request_to_handler( $request ); 815 if ( ! is_wp_error( $matched ) && isset( $matched[1]['args']['per_page']['maximum'] ) ) { 816 $request['per_page'] = (int) $matched[1]['args']['per_page']['maximum']; 817 } 818 } 819 820 $response = $this->dispatch( $request ); 821 822 /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ 823 $response = apply_filters( 'rest_post_dispatch', rest_ensure_response( $response ), $this, $request ); 824 825 $this->embed_cache[ $item['href'] ] = $this->response_to_data( $response, false ); 826 } 827 828 $embeds[] = $this->embed_cache[ $item['href'] ]; 829 } 830 831 // Determine if any real links were found. 832 $has_links = count( array_filter( $embeds ) ); 833 834 if ( $has_links ) { 835 $embedded[ $rel ] = $embeds; 836 } 837 } 838 839 if ( ! empty( $embedded ) ) { 840 $data['_embedded'] = $embedded; 841 } 842 843 return $data; 844 } 845 846 /** 847 * Wraps the response in an envelope. 848 * 849 * The enveloping technique is used to work around browser/client 850 * compatibility issues. Essentially, it converts the full HTTP response to 851 * data instead. 852 * 853 * @since 4.4.0 854 * @since 6.0.0 The `$embed` parameter can now contain a list of link relations to include. 855 * 856 * @param WP_REST_Response $response Response object. 857 * @param bool|string[] $embed Whether to embed all links, a filtered list of link relations, or no links. 858 * @return WP_REST_Response New response with wrapped data 859 */ 860 public function envelope_response( $response, $embed ) { 861 $envelope = array( 862 'body' => $this->response_to_data( $response, $embed ), 863 'status' => $response->get_status(), 864 'headers' => $response->get_headers(), 865 ); 866 867 /** 868 * Filters the enveloped form of a REST API response. 869 * 870 * @since 4.4.0 871 * 872 * @param array $envelope { 873 * Envelope data. 874 * 875 * @type array $body Response data. 876 * @type int $status The 3-digit HTTP status code. 877 * @type array $headers Map of header name to header value. 878 * } 879 * @param WP_REST_Response $response Original response data. 880 */ 881 $envelope = apply_filters( 'rest_envelope_response', $envelope, $response ); 882 883 // Ensure it's still a response and return. 884 return rest_ensure_response( $envelope ); 885 } 886 887 /** 888 * Registers a route to the server. 889 * 890 * @since 4.4.0 891 * 892 * @param string $route_namespace Namespace. 893 * @param string $route The REST route. 894 * @param array $route_args Route arguments. 895 * @param bool $override Optional. Whether the route should be overridden if it already exists. 896 * Default false. 897 */ 898 public function register_route( $route_namespace, $route, $route_args, $override = false ) { 899 if ( ! isset( $this->namespaces[ $route_namespace ] ) ) { 900 $this->namespaces[ $route_namespace ] = array(); 901 902 $this->register_route( 903 $route_namespace, 904 '/' . $route_namespace, 905 array( 906 array( 907 'methods' => self::READABLE, 908 'callback' => array( $this, 'get_namespace_index' ), 909 'args' => array( 910 'namespace' => array( 911 'default' => $route_namespace, 912 ), 913 'context' => array( 914 'default' => 'view', 915 ), 916 ), 917 ), 918 ) 919 ); 920 } 921 922 // Associative to avoid double-registration. 923 $this->namespaces[ $route_namespace ][ $route ] = true; 924 925 $route_args['namespace'] = $route_namespace; 926 927 if ( $override || empty( $this->endpoints[ $route ] ) ) { 928 $this->endpoints[ $route ] = $route_args; 929 } else { 930 $this->endpoints[ $route ] = array_merge( $this->endpoints[ $route ], $route_args ); 931 } 932 } 933 934 /** 935 * Retrieves the route map. 936 * 937 * The route map is an associative array with path regexes as the keys. The 938 * value is an indexed array with the callback function/method as the first 939 * item, and a bitmask of HTTP methods as the second item (see the class 940 * constants). 941 * 942 * Each route can be mapped to more than one callback by using an array of 943 * the indexed arrays. This allows mapping e.g. GET requests to one callback 944 * and POST requests to another. 945 * 946 * Note that the path regexes (array keys) must have @ escaped, as this is 947 * used as the delimiter with preg_match() 948 * 949 * @since 4.4.0 950 * @since 5.4.0 Added `$route_namespace` parameter. 951 * 952 * @param string $route_namespace Optionally, only return routes in the given namespace. 953 * @return array `'/path/regex' => array( $callback, $bitmask )` or 954 * `'/path/regex' => array( array( $callback, $bitmask ), ...)`. 955 */ 956 public function get_routes( $route_namespace = '' ) { 957 $endpoints = $this->endpoints; 958 959 if ( $route_namespace ) { 960 $endpoints = wp_list_filter( $endpoints, array( 'namespace' => $route_namespace ) ); 961 } 962 963 /** 964 * Filters the array of available REST API endpoints. 965 * 966 * @since 4.4.0 967 * 968 * @param array $endpoints The available endpoints. An array of matching regex patterns, each mapped 969 * to an array of callbacks for the endpoint. These take the format 970 * `'/path/regex' => array( $callback, $bitmask )` or 971 * `'/path/regex' => array( array( $callback, $bitmask ). 972 */ 973 $endpoints = apply_filters( 'rest_endpoints', $endpoints ); 974 975 // Normalize the endpoints. 976 $defaults = array( 977 'methods' => '', 978 'accept_json' => false, 979 'accept_raw' => false, 980 'show_in_index' => true, 981 'args' => array(), 982 ); 983 984 foreach ( $endpoints as $route => &$handlers ) { 985 986 if ( isset( $handlers['callback'] ) ) { 987 // Single endpoint, add one deeper. 988 $handlers = array( $handlers ); 989 } 990 991 if ( ! isset( $this->route_options[ $route ] ) ) { 992 $this->route_options[ $route ] = array(); 993 } 994 995 foreach ( $handlers as $key => &$handler ) { 996 997 if ( ! is_numeric( $key ) ) { 998 // Route option, move it to the options. 999 $this->route_options[ $route ][ $key ] = $handler; 1000 unset( $handlers[ $key ] ); 1001 continue; 1002 } 1003 1004 $handler = wp_parse_args( $handler, $defaults ); 1005 1006 // Allow comma-separated HTTP methods. 1007 if ( is_string( $handler['methods'] ) ) { 1008 $methods = explode( ',', $handler['methods'] ); 1009 } elseif ( is_array( $handler['methods'] ) ) { 1010 $methods = $handler['methods']; 1011 } else { 1012 $methods = array(); 1013 } 1014 1015 $handler['methods'] = array(); 1016 1017 foreach ( $methods as $method ) { 1018 $method = strtoupper( trim( $method ) ); 1019 $handler['methods'][ $method ] = true; 1020 } 1021 } 1022 } 1023 1024 return $endpoints; 1025 } 1026 1027 /** 1028 * Retrieves namespaces registered on the server. 1029 * 1030 * @since 4.4.0 1031 * 1032 * @return string[] List of registered namespaces. 1033 */ 1034 public function get_namespaces() { 1035 return array_keys( $this->namespaces ); 1036 } 1037 1038 /** 1039 * Retrieves specified options for a route. 1040 * 1041 * @since 4.4.0 1042 * 1043 * @param string $route Route pattern to fetch options for. 1044 * @return array|null Data as an associative array if found, or null if not found. 1045 */ 1046 public function get_route_options( $route ) { 1047 if ( ! isset( $this->route_options[ $route ] ) ) { 1048 return null; 1049 } 1050 1051 return $this->route_options[ $route ]; 1052 } 1053 1054 /** 1055 * Matches the request to a callback and call it. 1056 * 1057 * @since 4.4.0 1058 * 1059 * @param WP_REST_Request $request Request to attempt dispatching. 1060 * @return WP_REST_Response Response returned by the callback. 1061 */ 1062 public function dispatch( $request ) { 1063 $this->dispatching_requests[] = $request; 1064 1065 /** 1066 * Filters the pre-calculated result of a REST API dispatch request. 1067 * 1068 * Allow hijacking the request before dispatching by returning a non-empty. The returned value 1069 * will be used to serve the request instead. 1070 * 1071 * @since 4.4.0 1072 * 1073 * @param mixed $result Response to replace the requested version with. Can be anything 1074 * a normal endpoint can return, or null to not hijack the request. 1075 * @param WP_REST_Server $server Server instance. 1076 * @param WP_REST_Request $request Request used to generate the response. 1077 */ 1078 $result = apply_filters( 'rest_pre_dispatch', null, $this, $request ); 1079 1080 if ( ! empty( $result ) ) { 1081 1082 // Normalize to either WP_Error or WP_REST_Response... 1083 $result = rest_ensure_response( $result ); 1084 1085 // ...then convert WP_Error across. 1086 if ( is_wp_error( $result ) ) { 1087 $result = $this->error_to_response( $result ); 1088 } 1089 1090 array_pop( $this->dispatching_requests ); 1091 return $result; 1092 } 1093 1094 $error = null; 1095 $matched = $this->match_request_to_handler( $request ); 1096 1097 if ( is_wp_error( $matched ) ) { 1098 $response = $this->error_to_response( $matched ); 1099 array_pop( $this->dispatching_requests ); 1100 return $response; 1101 } 1102 1103 list( $route, $handler ) = $matched; 1104 1105 if ( ! is_callable( $handler['callback'] ) ) { 1106 $error = new WP_Error( 1107 'rest_invalid_handler', 1108 __( 'The handler for the route is invalid.' ), 1109 array( 'status' => 500 ) 1110 ); 1111 } 1112 1113 if ( ! is_wp_error( $error ) ) { 1114 $check_required = $request->has_valid_params(); 1115 if ( is_wp_error( $check_required ) ) { 1116 $error = $check_required; 1117 } else { 1118 $check_sanitized = $request->sanitize_params(); 1119 if ( is_wp_error( $check_sanitized ) ) { 1120 $error = $check_sanitized; 1121 } 1122 } 1123 } 1124 1125 $response = $this->respond_to_request( $request, $route, $handler, $error ); 1126 array_pop( $this->dispatching_requests ); 1127 return $response; 1128 } 1129 1130 /** 1131 * Returns whether the REST server is currently dispatching / responding to a request. 1132 * 1133 * This may be a standalone REST API request, or an internal request dispatched from within a regular page load. 1134 * 1135 * @since 6.5.0 1136 * 1137 * @return bool Whether the REST server is currently handling a request. 1138 */ 1139 public function is_dispatching() { 1140 return (bool) $this->dispatching_requests; 1141 } 1142 1143 /** 1144 * Matches a request object to its handler. 1145 * 1146 * @access private 1147 * @since 5.6.0 1148 * 1149 * @param WP_REST_Request $request The request object. 1150 * @return array|WP_Error The route and request handler on success or a WP_Error instance if no handler was found. 1151 */ 1152 protected function match_request_to_handler( $request ) { 1153 $method = $request->get_method(); 1154 $path = $request->get_route(); 1155 1156 $with_namespace = array(); 1157 1158 foreach ( $this->get_namespaces() as $namespace ) { 1159 if ( str_starts_with( trailingslashit( ltrim( $path, '/' ) ), $namespace ) ) { 1160 $with_namespace[] = $this->get_routes( $namespace ); 1161 } 1162 } 1163 1164 if ( $with_namespace ) { 1165 $routes = array_merge( ...$with_namespace ); 1166 } else { 1167 $routes = $this->get_routes(); 1168 } 1169 1170 foreach ( $routes as $route => $handlers ) { 1171 $match = preg_match( '@^' . $route . '$@i', $path, $matches ); 1172 1173 if ( ! $match ) { 1174 continue; 1175 } 1176 1177 $args = array(); 1178 1179 foreach ( $matches as $param => $value ) { 1180 if ( ! is_int( $param ) ) { 1181 $args[ $param ] = $value; 1182 } 1183 } 1184 1185 foreach ( $handlers as $handler ) { 1186 $callback = $handler['callback']; 1187 1188 // Fallback to GET method if no HEAD method is registered. 1189 $checked_method = $method; 1190 if ( 'HEAD' === $method && empty( $handler['methods']['HEAD'] ) ) { 1191 $checked_method = 'GET'; 1192 } 1193 if ( empty( $handler['methods'][ $checked_method ] ) ) { 1194 continue; 1195 } 1196 1197 if ( ! is_callable( $callback ) ) { 1198 return array( $route, $handler ); 1199 } 1200 1201 $request->set_url_params( $args ); 1202 $request->set_attributes( $handler ); 1203 1204 $defaults = array(); 1205 1206 foreach ( $handler['args'] as $arg => $options ) { 1207 if ( isset( $options['default'] ) ) { 1208 $defaults[ $arg ] = $options['default']; 1209 } 1210 } 1211 1212 $request->set_default_params( $defaults ); 1213 1214 return array( $route, $handler ); 1215 } 1216 } 1217 1218 return new WP_Error( 1219 'rest_no_route', 1220 __( 'No route was found matching the URL and request method.' ), 1221 array( 'status' => 404 ) 1222 ); 1223 } 1224 1225 /** 1226 * Dispatches the request to the callback handler. 1227 * 1228 * @access private 1229 * @since 5.6.0 1230 * 1231 * @param WP_REST_Request $request The request object. 1232 * @param string $route The matched route regex. 1233 * @param array $handler The matched route handler. 1234 * @param WP_Error|null $response The current error object if any. 1235 * @return WP_REST_Response 1236 */ 1237 protected function respond_to_request( $request, $route, $handler, $response ) { 1238 /** 1239 * Filters the response before executing any REST API callbacks. 1240 * 1241 * Allows plugins to perform additional validation after a 1242 * request is initialized and matched to a registered route, 1243 * but before it is executed. 1244 * 1245 * Note that this filter will not be called for requests that 1246 * fail to authenticate or match to a registered route. 1247 * 1248 * @since 4.7.0 1249 * 1250 * @param WP_REST_Response|WP_HTTP_Response|WP_Error|mixed $response Result to send to the client. 1251 * Usually a WP_REST_Response or WP_Error. 1252 * @param array $handler Route handler used for the request. 1253 * @param WP_REST_Request $request Request used to generate the response. 1254 */ 1255 $response = apply_filters( 'rest_request_before_callbacks', $response, $handler, $request ); 1256 1257 // Check permission specified on the route. 1258 if ( ! is_wp_error( $response ) && ! empty( $handler['permission_callback'] ) ) { 1259 $permission = call_user_func( $handler['permission_callback'], $request ); 1260 1261 if ( is_wp_error( $permission ) ) { 1262 $response = $permission; 1263 } elseif ( false === $permission || null === $permission ) { 1264 $response = new WP_Error( 1265 'rest_forbidden', 1266 __( 'Sorry, you are not allowed to do that.' ), 1267 array( 'status' => rest_authorization_required_code() ) 1268 ); 1269 } 1270 } 1271 1272 if ( ! is_wp_error( $response ) ) { 1273 /** 1274 * Filters the REST API dispatch request result. 1275 * 1276 * Allow plugins to override dispatching the request. 1277 * 1278 * @since 4.4.0 1279 * @since 4.5.0 Added `$route` and `$handler` parameters. 1280 * 1281 * @param mixed $dispatch_result Dispatch result, will be used if not empty. 1282 * @param WP_REST_Request $request Request used to generate the response. 1283 * @param string $route Route matched for the request. 1284 * @param array $handler Route handler used for the request. 1285 */ 1286 $dispatch_result = apply_filters( 'rest_dispatch_request', null, $request, $route, $handler ); 1287 1288 // Allow plugins to halt the request via this filter. 1289 if ( null !== $dispatch_result ) { 1290 $response = $dispatch_result; 1291 } else { 1292 $response = call_user_func( $handler['callback'], $request ); 1293 } 1294 } 1295 1296 /** 1297 * Filters the response immediately after executing any REST API 1298 * callbacks. 1299 * 1300 * Allows plugins to perform any needed cleanup, for example, 1301 * to undo changes made during the {@see 'rest_request_before_callbacks'} 1302 * filter. 1303 * 1304 * Note that this filter will not be called for requests that 1305 * fail to authenticate or match to a registered route. 1306 * 1307 * Note that an endpoint's `permission_callback` can still be 1308 * called after this filter - see `rest_send_allow_header()`. 1309 * 1310 * @since 4.7.0 1311 * 1312 * @param WP_REST_Response|WP_HTTP_Response|WP_Error|mixed $response Result to send to the client. 1313 * Usually a WP_REST_Response or WP_Error. 1314 * @param array $handler Route handler used for the request. 1315 * @param WP_REST_Request $request Request used to generate the response. 1316 */ 1317 $response = apply_filters( 'rest_request_after_callbacks', $response, $handler, $request ); 1318 1319 if ( is_wp_error( $response ) ) { 1320 $response = $this->error_to_response( $response ); 1321 } else { 1322 $response = rest_ensure_response( $response ); 1323 } 1324 1325 $response->set_matched_route( $route ); 1326 $response->set_matched_handler( $handler ); 1327 1328 return $response; 1329 } 1330 1331 /** 1332 * Returns if an error occurred during most recent JSON encode/decode. 1333 * 1334 * Strings to be translated will be in format like 1335 * "Encoding error: Maximum stack depth exceeded". 1336 * 1337 * @since 4.4.0 1338 * 1339 * @return false|string Boolean false or string error message. 1340 */ 1341 protected function get_json_last_error() { 1342 $last_error_code = json_last_error(); 1343 1344 if ( JSON_ERROR_NONE === $last_error_code || empty( $last_error_code ) ) { 1345 return false; 1346 } 1347 1348 return json_last_error_msg(); 1349 } 1350 1351 /** 1352 * Retrieves the site index. 1353 * 1354 * This endpoint describes the capabilities of the site. 1355 * 1356 * @since 4.4.0 1357 * 1358 * @param array $request { 1359 * Request. 1360 * 1361 * @type string $context Context. 1362 * } 1363 * @return WP_REST_Response The API root index data. 1364 */ 1365 public function get_index( $request ) { 1366 // General site data. 1367 $available = array( 1368 'name' => get_option( 'blogname' ), 1369 'description' => get_option( 'blogdescription' ), 1370 'url' => get_option( 'siteurl' ), 1371 'home' => home_url(), 1372 'gmt_offset' => get_option( 'gmt_offset' ), 1373 'timezone_string' => get_option( 'timezone_string' ), 1374 'namespaces' => array_keys( $this->namespaces ), 1375 'authentication' => array(), 1376 'routes' => $this->get_data_for_routes( $this->get_routes(), $request['context'] ), 1377 ); 1378 1379 $response = new WP_REST_Response( $available ); 1380 1381 $fields = isset( $request['_fields'] ) ? $request['_fields'] : ''; 1382 $fields = wp_parse_list( $fields ); 1383 if ( empty( $fields ) ) { 1384 $fields[] = '_links'; 1385 } 1386 1387 if ( $request->has_param( '_embed' ) ) { 1388 $fields[] = '_embedded'; 1389 } 1390 1391 if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) { 1392 $response->add_link( 'help', 'https://developer.wordpress.org/rest-api/' ); 1393 $this->add_active_theme_link_to_index( $response ); 1394 $this->add_site_logo_to_index( $response ); 1395 $this->add_site_icon_to_index( $response ); 1396 } else { 1397 if ( rest_is_field_included( 'site_logo', $fields ) ) { 1398 $this->add_site_logo_to_index( $response ); 1399 } 1400 if ( rest_is_field_included( 'site_icon', $fields ) || rest_is_field_included( 'site_icon_url', $fields ) ) { 1401 $this->add_site_icon_to_index( $response ); 1402 } 1403 } 1404 1405 /** 1406 * Filters the REST API root index data. 1407 * 1408 * This contains the data describing the API. This includes information 1409 * about supported authentication schemes, supported namespaces, routes 1410 * available on the API, and a small amount of data about the site. 1411 * 1412 * @since 4.4.0 1413 * @since 6.0.0 Added `$request` parameter. 1414 * 1415 * @param WP_REST_Response $response Response data. 1416 * @param WP_REST_Request $request Request data. 1417 */ 1418 return apply_filters( 'rest_index', $response, $request ); 1419 } 1420 1421 /** 1422 * Adds a link to the active theme for users who have proper permissions. 1423 * 1424 * @since 5.7.0 1425 * 1426 * @param WP_REST_Response $response REST API response. 1427 */ 1428 protected function add_active_theme_link_to_index( WP_REST_Response $response ) { 1429 $should_add = current_user_can( 'switch_themes' ) || current_user_can( 'manage_network_themes' ); 1430 1431 if ( ! $should_add && current_user_can( 'edit_posts' ) ) { 1432 $should_add = true; 1433 } 1434 1435 if ( ! $should_add ) { 1436 foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) { 1437 if ( current_user_can( $post_type->cap->edit_posts ) ) { 1438 $should_add = true; 1439 break; 1440 } 1441 } 1442 } 1443 1444 if ( $should_add ) { 1445 $theme = wp_get_theme(); 1446 $response->add_link( 'https://api.w.org/active-theme', rest_url( 'wp/v2/themes/' . $theme->get_stylesheet() ) ); 1447 } 1448 } 1449 1450 /** 1451 * Exposes the site logo through the WordPress REST API. 1452 * 1453 * This is used for fetching this information when user has no rights 1454 * to update settings. 1455 * 1456 * @since 5.8.0 1457 * 1458 * @param WP_REST_Response $response REST API response. 1459 */ 1460 protected function add_site_logo_to_index( WP_REST_Response $response ) { 1461 $site_logo_id = get_theme_mod( 'custom_logo', 0 ); 1462 1463 $this->add_image_to_index( $response, $site_logo_id, 'site_logo' ); 1464 } 1465 1466 /** 1467 * Exposes the site icon through the WordPress REST API. 1468 * 1469 * This is used for fetching this information when user has no rights 1470 * to update settings. 1471 * 1472 * @since 5.9.0 1473 * 1474 * @param WP_REST_Response $response REST API response. 1475 */ 1476 protected function add_site_icon_to_index( WP_REST_Response $response ) { 1477 $site_icon_id = get_option( 'site_icon', 0 ); 1478 1479 $this->add_image_to_index( $response, $site_icon_id, 'site_icon' ); 1480 1481 $response->data['site_icon_url'] = get_site_icon_url(); 1482 } 1483 1484 /** 1485 * Exposes an image through the WordPress REST API. 1486 * This is used for fetching this information when user has no rights 1487 * to update settings. 1488 * 1489 * @since 5.9.0 1490 * 1491 * @param WP_REST_Response $response REST API response. 1492 * @param int $image_id Image attachment ID. 1493 * @param string $type Type of Image. 1494 */ 1495 protected function add_image_to_index( WP_REST_Response $response, $image_id, $type ) { 1496 $response->data[ $type ] = (int) $image_id; 1497 if ( $image_id ) { 1498 $response->add_link( 1499 'https://api.w.org/featuredmedia', 1500 rest_url( rest_get_route_for_post( $image_id ) ), 1501 array( 1502 'embeddable' => true, 1503 'type' => $type, 1504 ) 1505 ); 1506 } 1507 } 1508 1509 /** 1510 * Retrieves the index for a namespace. 1511 * 1512 * @since 4.4.0 1513 * 1514 * @param WP_REST_Request $request REST request instance. 1515 * @return WP_REST_Response|WP_Error WP_REST_Response instance if the index was found, 1516 * WP_Error if the namespace isn't set. 1517 */ 1518 public function get_namespace_index( $request ) { 1519 $namespace = $request['namespace']; 1520 1521 if ( ! isset( $this->namespaces[ $namespace ] ) ) { 1522 return new WP_Error( 1523 'rest_invalid_namespace', 1524 __( 'The specified namespace could not be found.' ), 1525 array( 'status' => 404 ) 1526 ); 1527 } 1528 1529 $routes = $this->namespaces[ $namespace ]; 1530 $endpoints = array_intersect_key( $this->get_routes(), $routes ); 1531 1532 $data = array( 1533 'namespace' => $namespace, 1534 'routes' => $this->get_data_for_routes( $endpoints, $request['context'] ), 1535 ); 1536 $response = rest_ensure_response( $data ); 1537 1538 // Link to the root index. 1539 $response->add_link( 'up', rest_url( '/' ) ); 1540 1541 /** 1542 * Filters the REST API namespace index data. 1543 * 1544 * This typically is just the route data for the namespace, but you can 1545 * add any data you'd like here. 1546 * 1547 * @since 4.4.0 1548 * 1549 * @param WP_REST_Response $response Response data. 1550 * @param WP_REST_Request $request Request data. The namespace is passed as the 'namespace' parameter. 1551 */ 1552 return apply_filters( 'rest_namespace_index', $response, $request ); 1553 } 1554 1555 /** 1556 * Retrieves the publicly-visible data for routes. 1557 * 1558 * @since 4.4.0 1559 * 1560 * @param array $routes Routes to get data for. 1561 * @param string $context Optional. Context for data. Accepts 'view' or 'help'. Default 'view'. 1562 * @return array[] Route data to expose in indexes, keyed by route. 1563 */ 1564 public function get_data_for_routes( $routes, $context = 'view' ) { 1565 $available = array(); 1566 1567 // Find the available routes. 1568 foreach ( $routes as $route => $callbacks ) { 1569 $data = $this->get_data_for_route( $route, $callbacks, $context ); 1570 if ( empty( $data ) ) { 1571 continue; 1572 } 1573 1574 /** 1575 * Filters the publicly-visible data for a single REST API route. 1576 * 1577 * @since 4.4.0 1578 * 1579 * @param array $data Publicly-visible data for the route. 1580 */ 1581 $available[ $route ] = apply_filters( 'rest_endpoints_description', $data ); 1582 } 1583 1584 /** 1585 * Filters the publicly-visible data for REST API routes. 1586 * 1587 * This data is exposed on indexes and can be used by clients or 1588 * developers to investigate the site and find out how to use it. It 1589 * acts as a form of self-documentation. 1590 * 1591 * @since 4.4.0 1592 * 1593 * @param array[] $available Route data to expose in indexes, keyed by route. 1594 * @param array $routes Internal route data as an associative array. 1595 */ 1596 return apply_filters( 'rest_route_data', $available, $routes ); 1597 } 1598 1599 /** 1600 * Retrieves publicly-visible data for the route. 1601 * 1602 * @since 4.4.0 1603 * 1604 * @param string $route Route to get data for. 1605 * @param array $callbacks Callbacks to convert to data. 1606 * @param string $context Optional. Context for the data. Accepts 'view' or 'help'. Default 'view'. 1607 * @return array|null Data for the route, or null if no publicly-visible data. 1608 */ 1609 public function get_data_for_route( $route, $callbacks, $context = 'view' ) { 1610 $data = array( 1611 'namespace' => '', 1612 'methods' => array(), 1613 'endpoints' => array(), 1614 ); 1615 1616 $allow_batch = false; 1617 1618 if ( isset( $this->route_options[ $route ] ) ) { 1619 $options = $this->route_options[ $route ]; 1620 1621 if ( isset( $options['namespace'] ) ) { 1622 $data['namespace'] = $options['namespace']; 1623 } 1624 1625 $allow_batch = isset( $options['allow_batch'] ) ? $options['allow_batch'] : false; 1626 1627 if ( isset( $options['schema'] ) && 'help' === $context ) { 1628 $data['schema'] = call_user_func( $options['schema'] ); 1629 } 1630 } 1631 1632 $allowed_schema_keywords = array_flip( rest_get_allowed_schema_keywords() ); 1633 1634 $route = preg_replace( '#\(\?P<(\w+?)>.*?\)#', '{$1}', $route ); 1635 1636 foreach ( $callbacks as $callback ) { 1637 // Skip to the next route if any callback is hidden. 1638 if ( empty( $callback['show_in_index'] ) ) { 1639 continue; 1640 } 1641 1642 $data['methods'] = array_merge( $data['methods'], array_keys( $callback['methods'] ) ); 1643 $endpoint_data = array( 1644 'methods' => array_keys( $callback['methods'] ), 1645 ); 1646 1647 $callback_batch = isset( $callback['allow_batch'] ) ? $callback['allow_batch'] : $allow_batch; 1648 1649 if ( $callback_batch ) { 1650 $endpoint_data['allow_batch'] = $callback_batch; 1651 } 1652 1653 if ( isset( $callback['args'] ) ) { 1654 $endpoint_data['args'] = array(); 1655 1656 foreach ( $callback['args'] as $key => $opts ) { 1657 if ( is_string( $opts ) ) { 1658 $opts = array( $opts => 0 ); 1659 } elseif ( ! is_array( $opts ) ) { 1660 $opts = array(); 1661 } 1662 $arg_data = array_intersect_key( $opts, $allowed_schema_keywords ); 1663 $arg_data['required'] = ! empty( $opts['required'] ); 1664 1665 $endpoint_data['args'][ $key ] = $arg_data; 1666 } 1667 } 1668 1669 $data['endpoints'][] = $endpoint_data; 1670 1671 // For non-variable routes, generate links. 1672 if ( ! str_contains( $route, '{' ) ) { 1673 $data['_links'] = array( 1674 'self' => array( 1675 array( 1676 'href' => rest_url( $route ), 1677 ), 1678 ), 1679 ); 1680 } 1681 } 1682 1683 if ( empty( $data['methods'] ) ) { 1684 // No methods supported, hide the route. 1685 return null; 1686 } 1687 1688 return $data; 1689 } 1690 1691 /** 1692 * Gets the maximum number of requests that can be included in a batch. 1693 * 1694 * @since 5.6.0 1695 * 1696 * @return int The maximum requests. 1697 */ 1698 protected function get_max_batch_size() { 1699 /** 1700 * Filters the maximum number of REST API requests that can be included in a batch. 1701 * 1702 * @since 5.6.0 1703 * 1704 * @param int $max_size The maximum size. 1705 */ 1706 return apply_filters( 'rest_get_max_batch_size', 25 ); 1707 } 1708 1709 /** 1710 * Serves the batch/v1 request. 1711 * 1712 * @since 5.6.0 1713 * 1714 * @param WP_REST_Request $batch_request The batch request object. 1715 * @return WP_REST_Response The generated response object. 1716 */ 1717 public function serve_batch_request_v1( WP_REST_Request $batch_request ) { 1718 $requests = array(); 1719 1720 foreach ( $batch_request['requests'] as $args ) { 1721 $parsed_url = wp_parse_url( $args['path'] ); 1722 1723 if ( false === $parsed_url ) { 1724 $requests[] = new WP_Error( 'parse_path_failed', __( 'Could not parse the path.' ), array( 'status' => 400 ) ); 1725 1726 continue; 1727 } 1728 1729 $single_request = new WP_REST_Request( isset( $args['method'] ) ? $args['method'] : 'POST', $parsed_url['path'] ); 1730 1731 if ( ! empty( $parsed_url['query'] ) ) { 1732 $query_args = array(); 1733 wp_parse_str( $parsed_url['query'], $query_args ); 1734 $single_request->set_query_params( $query_args ); 1735 } 1736 1737 if ( ! empty( $args['body'] ) ) { 1738 $single_request->set_body_params( $args['body'] ); 1739 } 1740 1741 if ( ! empty( $args['headers'] ) ) { 1742 $single_request->set_headers( $args['headers'] ); 1743 } 1744 1745 $requests[] = $single_request; 1746 } 1747 1748 $matches = array(); 1749 $validation = array(); 1750 $has_error = false; 1751 1752 foreach ( $requests as $single_request ) { 1753 $match = $this->match_request_to_handler( $single_request ); 1754 $matches[] = $match; 1755 $error = null; 1756 1757 if ( is_wp_error( $match ) ) { 1758 $error = $match; 1759 } 1760 1761 if ( ! $error ) { 1762 list( $route, $handler ) = $match; 1763 1764 if ( isset( $handler['allow_batch'] ) ) { 1765 $allow_batch = $handler['allow_batch']; 1766 } else { 1767 $route_options = $this->get_route_options( $route ); 1768 $allow_batch = isset( $route_options['allow_batch'] ) ? $route_options['allow_batch'] : false; 1769 } 1770 1771 if ( ! is_array( $allow_batch ) || empty( $allow_batch['v1'] ) ) { 1772 $error = new WP_Error( 1773 'rest_batch_not_allowed', 1774 __( 'The requested route does not support batch requests.' ), 1775 array( 'status' => 400 ) 1776 ); 1777 } 1778 } 1779 1780 if ( ! $error ) { 1781 $check_required = $single_request->has_valid_params(); 1782 if ( is_wp_error( $check_required ) ) { 1783 $error = $check_required; 1784 } 1785 } 1786 1787 if ( ! $error ) { 1788 $check_sanitized = $single_request->sanitize_params(); 1789 if ( is_wp_error( $check_sanitized ) ) { 1790 $error = $check_sanitized; 1791 } 1792 } 1793 1794 if ( $error ) { 1795 $has_error = true; 1796 $validation[] = $error; 1797 } else { 1798 $validation[] = true; 1799 } 1800 } 1801 1802 $responses = array(); 1803 1804 if ( $has_error && 'require-all-validate' === $batch_request['validation'] ) { 1805 foreach ( $validation as $valid ) { 1806 if ( is_wp_error( $valid ) ) { 1807 $responses[] = $this->envelope_response( $this->error_to_response( $valid ), false )->get_data(); 1808 } else { 1809 $responses[] = null; 1810 } 1811 } 1812 1813 return new WP_REST_Response( 1814 array( 1815 'failed' => 'validation', 1816 'responses' => $responses, 1817 ), 1818 WP_Http::MULTI_STATUS 1819 ); 1820 } 1821 1822 foreach ( $requests as $i => $single_request ) { 1823 $clean_request = clone $single_request; 1824 $clean_request->set_url_params( array() ); 1825 $clean_request->set_attributes( array() ); 1826 $clean_request->set_default_params( array() ); 1827 1828 /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ 1829 $result = apply_filters( 'rest_pre_dispatch', null, $this, $clean_request ); 1830 1831 if ( empty( $result ) ) { 1832 $match = $matches[ $i ]; 1833 $error = null; 1834 1835 if ( is_wp_error( $validation[ $i ] ) ) { 1836 $error = $validation[ $i ]; 1837 } 1838 1839 if ( is_wp_error( $match ) ) { 1840 $result = $this->error_to_response( $match ); 1841 } else { 1842 list( $route, $handler ) = $match; 1843 1844 if ( ! $error && ! is_callable( $handler['callback'] ) ) { 1845 $error = new WP_Error( 1846 'rest_invalid_handler', 1847 __( 'The handler for the route is invalid' ), 1848 array( 'status' => 500 ) 1849 ); 1850 } 1851 1852 $result = $this->respond_to_request( $single_request, $route, $handler, $error ); 1853 } 1854 } 1855 1856 /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ 1857 $result = apply_filters( 'rest_post_dispatch', rest_ensure_response( $result ), $this, $single_request ); 1858 1859 $responses[] = $this->envelope_response( $result, false )->get_data(); 1860 } 1861 1862 return new WP_REST_Response( array( 'responses' => $responses ), WP_Http::MULTI_STATUS ); 1863 } 1864 1865 /** 1866 * Sends an HTTP status code. 1867 * 1868 * @since 4.4.0 1869 * 1870 * @param int $code HTTP status. 1871 */ 1872 protected function set_status( $code ) { 1873 status_header( $code ); 1874 } 1875 1876 /** 1877 * Sends an HTTP header. 1878 * 1879 * @since 4.4.0 1880 * 1881 * @param string $key Header key. 1882 * @param string $value Header value. 1883 */ 1884 public function send_header( $key, $value ) { 1885 /* 1886 * Sanitize as per RFC2616 (Section 4.2): 1887 * 1888 * Any LWS that occurs between field-content MAY be replaced with a 1889 * single SP before interpreting the field value or forwarding the 1890 * message downstream. 1891 */ 1892 $value = preg_replace( '/\s+/', ' ', $value ); 1893 header( sprintf( '%s: %s', $key, $value ) ); 1894 } 1895 1896 /** 1897 * Sends multiple HTTP headers. 1898 * 1899 * @since 4.4.0 1900 * 1901 * @param array $headers Map of header name to header value. 1902 */ 1903 public function send_headers( $headers ) { 1904 foreach ( $headers as $key => $value ) { 1905 $this->send_header( $key, $value ); 1906 } 1907 } 1908 1909 /** 1910 * Removes an HTTP header from the current response. 1911 * 1912 * @since 4.8.0 1913 * 1914 * @param string $key Header key. 1915 */ 1916 public function remove_header( $key ) { 1917 header_remove( $key ); 1918 } 1919 1920 /** 1921 * Retrieves the raw request entity (body). 1922 * 1923 * @since 4.4.0 1924 * 1925 * @global string $HTTP_RAW_POST_DATA Raw post data. 1926 * 1927 * @return string Raw request data. 1928 */ 1929 public static function get_raw_data() { 1930 // phpcs:disable PHPCompatibility.Variables.RemovedPredefinedGlobalVariables.http_raw_post_dataDeprecatedRemoved 1931 global $HTTP_RAW_POST_DATA; 1932 1933 // $HTTP_RAW_POST_DATA was deprecated in PHP 5.6 and removed in PHP 7.0. 1934 if ( ! isset( $HTTP_RAW_POST_DATA ) ) { 1935 $HTTP_RAW_POST_DATA = file_get_contents( 'php://input' ); 1936 } 1937 1938 return $HTTP_RAW_POST_DATA; 1939 // phpcs:enable 1940 } 1941 1942 /** 1943 * Extracts headers from a PHP-style $_SERVER array. 1944 * 1945 * @since 4.4.0 1946 * 1947 * @param array $server Associative array similar to `$_SERVER`. 1948 * @return array Headers extracted from the input. 1949 */ 1950 public function get_headers( $server ) { 1951 $headers = array(); 1952 1953 // CONTENT_* headers are not prefixed with HTTP_. 1954 $additional = array( 1955 'CONTENT_LENGTH' => true, 1956 'CONTENT_MD5' => true, 1957 'CONTENT_TYPE' => true, 1958 ); 1959 1960 foreach ( $server as $key => $value ) { 1961 if ( str_starts_with( $key, 'HTTP_' ) ) { 1962 $headers[ substr( $key, 5 ) ] = $value; 1963 } elseif ( 'REDIRECT_HTTP_AUTHORIZATION' === $key && empty( $server['HTTP_AUTHORIZATION'] ) ) { 1964 /* 1965 * In some server configurations, the authorization header is passed in this alternate location. 1966 * Since it would not be passed in in both places we do not check for both headers and resolve. 1967 */ 1968 $headers['AUTHORIZATION'] = $value; 1969 } elseif ( isset( $additional[ $key ] ) ) { 1970 $headers[ $key ] = $value; 1971 } 1972 } 1973 1974 return $headers; 1975 } 1976 }
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