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Edit File: class.json-api.php
<?php defined( 'WPCOM_JSON_API__DEBUG' ) or define( 'WPCOM_JSON_API__DEBUG', false ); require_once dirname( __FILE__ ) . '/sal/class.json-api-platform.php'; class WPCOM_JSON_API { static $self = null; public $endpoints = array(); public $token_details = array(); public $method = ''; public $url = ''; public $path = ''; public $version = null; public $query = array(); public $post_body = null; public $files = null; public $content_type = null; public $accept = ''; public $_server_https; public $exit = true; public $public_api_scheme = 'https'; public $output_status_code = 200; public $trapped_error = null; public $did_output = false; public $extra_headers = array(); public $amp_source_origin = null; /** * @return WPCOM_JSON_API instance */ static function init( $method = null, $url = null, $post_body = null ) { if ( ! self::$self ) { $class = function_exists( 'get_called_class' ) ? get_called_class() : __CLASS__; // phpcs:ignore PHPCompatibility.PHP.NewFunctions.get_called_classFound self::$self = new $class( $method, $url, $post_body ); } return self::$self; } function add( WPCOM_JSON_API_Endpoint $endpoint ) { $path_versions = serialize( array( $endpoint->path, $endpoint->min_version, $endpoint->max_version, ) ); if ( ! isset( $this->endpoints[ $path_versions ] ) ) { $this->endpoints[ $path_versions ] = array(); } $this->endpoints[ $path_versions ][ $endpoint->method ] = $endpoint; } static function is_truthy( $value ) { switch ( strtolower( (string) $value ) ) { case '1': case 't': case 'true': return true; } return false; } static function is_falsy( $value ) { switch ( strtolower( (string) $value ) ) { case '0': case 'f': case 'false': return true; } return false; } function __construct( ...$args ) { call_user_func_array( array( $this, 'setup_inputs' ), $args ); } function setup_inputs( $method = null, $url = null, $post_body = null ) { if ( is_null( $method ) ) { $this->method = strtoupper( $_SERVER['REQUEST_METHOD'] ); } else { $this->method = strtoupper( $method ); } if ( is_null( $url ) ) { $this->url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] ); } else { $this->url = $url; } $parsed = wp_parse_url( $this->url ); if ( ! empty( $parsed['path'] ) ) { $this->path = $parsed['path']; } if ( ! empty( $parsed['query'] ) ) { wp_parse_str( $parsed['query'], $this->query ); } if ( isset( $_SERVER['HTTP_ACCEPT'] ) && $_SERVER['HTTP_ACCEPT'] ) { $this->accept = $_SERVER['HTTP_ACCEPT']; } if ( 'POST' === $this->method ) { if ( is_null( $post_body ) ) { $this->post_body = file_get_contents( 'php://input' ); if ( isset( $_SERVER['HTTP_CONTENT_TYPE'] ) && $_SERVER['HTTP_CONTENT_TYPE'] ) { $this->content_type = $_SERVER['HTTP_CONTENT_TYPE']; } elseif ( isset( $_SERVER['CONTENT_TYPE'] ) && $_SERVER['CONTENT_TYPE'] ) { $this->content_type = $_SERVER['CONTENT_TYPE']; } elseif ( '{' === $this->post_body[0] ) { $this->content_type = 'application/json'; } else { $this->content_type = 'application/x-www-form-urlencoded'; } if ( 0 === strpos( strtolower( $this->content_type ), 'multipart/' ) ) { $this->post_body = http_build_query( stripslashes_deep( $_POST ) ); $this->files = $_FILES; $this->content_type = 'multipart/form-data'; } } else { $this->post_body = $post_body; $this->content_type = '{' === isset( $this->post_body[0] ) && $this->post_body[0] ? 'application/json' : 'application/x-www-form-urlencoded'; } } else { $this->post_body = null; $this->content_type = null; } $this->_server_https = array_key_exists( 'HTTPS', $_SERVER ) ? $_SERVER['HTTPS'] : '--UNset--'; } function initialize() { $this->token_details['blog_id'] = Jetpack_Options::get_option( 'id' ); } /** * Checks if the current request is authorized with a blog token. * This method is overridden by a child class in WPCOM. * * @since 9.1.0 * * @param boolean|int $site_id The site id. * @return boolean */ public function is_jetpack_authorized_for_site( $site_id = false ) { if ( ! $this->token_details ) { return false; } $token_details = (object) $this->token_details; $site_in_token = (int) $token_details->blog_id; if ( $site_in_token < 1 ) { return false; } if ( $site_id && $site_in_token !== (int) $site_id ) { return false; } if ( (int) get_current_user_id() !== 0 ) { // If Jetpack blog token is used, no logged-in user should exist. return false; } return true; } function serve( $exit = true ) { ini_set( 'display_errors', false ); $this->exit = (bool) $exit; // This was causing problems with Jetpack, but is necessary for wpcom // @see https://github.com/Automattic/jetpack/pull/2603 // @see r124548-wpcom if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) { add_filter( 'home_url', array( $this, 'ensure_http_scheme_of_home_url' ), 10, 3 ); } add_filter( 'user_can_richedit', '__return_true' ); add_filter( 'comment_edit_pre', array( $this, 'comment_edit_pre' ) ); $initialization = $this->initialize(); if ( 'OPTIONS' == $this->method ) { /** * Fires before the page output. * Can be used to specify custom header options. * * @module json-api * * @since 3.1.0 */ do_action( 'wpcom_json_api_options' ); return $this->output( 200, '', 'text/plain' ); } if ( is_wp_error( $initialization ) ) { $this->output_error( $initialization ); return; } // Normalize path and extract API version $this->path = untrailingslashit( $this->path ); preg_match( '#^/rest/v(\d+(\.\d+)*)#', $this->path, $matches ); $this->path = substr( $this->path, strlen( $matches[0] ) ); $this->version = $matches[1]; $allowed_methods = array( 'GET', 'POST' ); $four_oh_five = false; $is_help = preg_match( '#/help/?$#i', $this->path ); $matching_endpoints = array(); if ( $is_help ) { $origin = get_http_origin(); if ( ! empty( $origin ) && 'GET' == $this->method ) { header( 'Access-Control-Allow-Origin: ' . esc_url_raw( $origin ) ); } $this->path = substr( rtrim( $this->path, '/' ), 0, -5 ); // Show help for all matching endpoints regardless of method $methods = $allowed_methods; $find_all_matching_endpoints = true; // How deep to truncate each endpoint's path to see if it matches this help request $depth = substr_count( $this->path, '/' ) + 1; if ( false !== stripos( $this->accept, 'javascript' ) || false !== stripos( $this->accept, 'json' ) ) { $help_content_type = 'json'; } else { $help_content_type = 'html'; } } else { if ( in_array( $this->method, $allowed_methods ) ) { // Only serve requested method $methods = array( $this->method ); $find_all_matching_endpoints = false; } else { // We don't allow this requested method - find matching endpoints and send 405 $methods = $allowed_methods; $find_all_matching_endpoints = true; $four_oh_five = true; } } // Find which endpoint to serve $found = false; foreach ( $this->endpoints as $endpoint_path_versions => $endpoints_by_method ) { $endpoint_path_versions = unserialize( $endpoint_path_versions ); $endpoint_path = $endpoint_path_versions[0]; $endpoint_min_version = $endpoint_path_versions[1]; $endpoint_max_version = $endpoint_path_versions[2]; // Make sure max_version is not less than min_version if ( version_compare( $endpoint_max_version, $endpoint_min_version, '<' ) ) { $endpoint_max_version = $endpoint_min_version; } foreach ( $methods as $method ) { if ( ! isset( $endpoints_by_method[ $method ] ) ) { continue; } // Normalize $endpoint_path = untrailingslashit( $endpoint_path ); if ( $is_help ) { // Truncate path at help depth $endpoint_path = join( '/', array_slice( explode( '/', $endpoint_path ), 0, $depth ) ); } // Generate regular expression from sprintf() $endpoint_path_regex = str_replace( array( '%s', '%d' ), array( '([^/?&]+)', '(\d+)' ), $endpoint_path ); if ( ! preg_match( "#^$endpoint_path_regex\$#", $this->path, $path_pieces ) ) { // This endpoint does not match the requested path. continue; } if ( version_compare( $this->version, $endpoint_min_version, '<' ) || version_compare( $this->version, $endpoint_max_version, '>' ) ) { // This endpoint does not match the requested version. continue; } $found = true; if ( $find_all_matching_endpoints ) { $matching_endpoints[] = array( $endpoints_by_method[ $method ], $path_pieces ); } else { // The method parameters are now in $path_pieces $endpoint = $endpoints_by_method[ $method ]; break 2; } } } if ( ! $found ) { return $this->output( 404, '', 'text/plain' ); } if ( $four_oh_five ) { $allowed_methods = array(); foreach ( $matching_endpoints as $matching_endpoint ) { $allowed_methods[] = $matching_endpoint[0]->method; } header( 'Allow: ' . strtoupper( join( ',', array_unique( $allowed_methods ) ) ) ); return $this->output( 405, array( 'error' => 'not_allowed', 'error_message' => 'Method not allowed', ) ); } if ( $is_help ) { /** * Fires before the API output. * * @since 1.9.0 * * @param string help. */ do_action( 'wpcom_json_api_output', 'help' ); $proxied = function_exists( 'wpcom_is_proxied_request' ) ? wpcom_is_proxied_request() : false; if ( 'json' === $help_content_type ) { $docs = array(); foreach ( $matching_endpoints as $matching_endpoint ) { if ( $matching_endpoint[0]->is_publicly_documentable() || $proxied || WPCOM_JSON_API__DEBUG ) { $docs[] = call_user_func( array( $matching_endpoint[0], 'generate_documentation' ) ); } } return $this->output( 200, $docs ); } else { status_header( 200 ); foreach ( $matching_endpoints as $matching_endpoint ) { if ( $matching_endpoint[0]->is_publicly_documentable() || $proxied || WPCOM_JSON_API__DEBUG ) { call_user_func( array( $matching_endpoint[0], 'document' ) ); } } } exit; } if ( $endpoint->in_testing && ! WPCOM_JSON_API__DEBUG ) { return $this->output( 404, '', 'text/plain' ); } /** This action is documented in class.json-api.php */ do_action( 'wpcom_json_api_output', $endpoint->stat ); $response = $this->process_request( $endpoint, $path_pieces ); if ( ! $response && ! is_array( $response ) ) { return $this->output( 500, '', 'text/plain' ); } elseif ( is_wp_error( $response ) ) { return $this->output_error( $response ); } $output_status_code = $this->output_status_code; $this->set_output_status_code(); return $this->output( $output_status_code, $response, 'application/json', $this->extra_headers ); } function process_request( WPCOM_JSON_API_Endpoint $endpoint, $path_pieces ) { $this->endpoint = $endpoint; return call_user_func_array( array( $endpoint, 'callback' ), $path_pieces ); } function output_early( $status_code, $response = null, $content_type = 'application/json' ) { $exit = $this->exit; $this->exit = false; if ( is_wp_error( $response ) ) { $this->output_error( $response ); } else { $this->output( $status_code, $response, $content_type ); } $this->exit = $exit; if ( ! defined( 'XMLRPC_REQUEST' ) || ! XMLRPC_REQUEST ) { $this->finish_request(); } } function set_output_status_code( $code = 200 ) { $this->output_status_code = $code; } function output( $status_code, $response = null, $content_type = 'application/json', $extra = array() ) { // In case output() was called before the callback returned if ( $this->did_output ) { if ( $this->exit ) { exit; } return $content_type; } $this->did_output = true; // 400s and 404s are allowed for all origins if ( 404 == $status_code || 400 == $status_code ) { header( 'Access-Control-Allow-Origin: *' ); } /* Add headers for form submission from <amp-form/> */ if ( $this->amp_source_origin ) { header( 'Access-Control-Allow-Origin: ' . wp_unslash( $this->amp_source_origin ) ); header( 'Access-Control-Allow-Credentials: true' ); } if ( is_null( $response ) ) { $response = new stdClass(); } if ( 'text/plain' === $content_type || 'text/html' === $content_type ) { status_header( (int) $status_code ); header( 'Content-Type: ' . $content_type ); foreach ( $extra as $key => $value ) { header( "$key: $value" ); } echo $response; if ( $this->exit ) { exit; } return $content_type; } $response = $this->filter_fields( $response ); if ( isset( $this->query['http_envelope'] ) && self::is_truthy( $this->query['http_envelope'] ) ) { $headers = array( array( 'name' => 'Content-Type', 'value' => $content_type, ), ); foreach ( $extra as $key => $value ) { $headers[] = array( 'name' => $key, 'value' => $value, ); } $response = array( 'code' => (int) $status_code, 'headers' => $headers, 'body' => $response, ); $status_code = 200; $content_type = 'application/json'; } status_header( (int) $status_code ); header( "Content-Type: $content_type" ); if ( isset( $this->query['callback'] ) && is_string( $this->query['callback'] ) ) { $callback = preg_replace( '/[^a-z0-9_.]/i', '', $this->query['callback'] ); } else { $callback = false; } if ( $callback ) { // Mitigate Rosetta Flash [1] by setting the Content-Type-Options: nosniff header // and by prepending the JSONP response with a JS comment. // [1] https://blog.miki.it/2014/7/8/abusing-jsonp-with-rosetta-flash/index.html echo "/**/$callback("; } echo $this->json_encode( $response ); if ( $callback ) { echo ');'; } if ( $this->exit ) { exit; } return $content_type; } public static function serializable_error( $error ) { $status_code = $error->get_error_data(); if ( is_array( $status_code ) ) { $status_code = $status_code['status_code']; } if ( ! $status_code ) { $status_code = 400; } $response = array( 'error' => $error->get_error_code(), 'message' => $error->get_error_message(), ); if ( $additional_data = $error->get_error_data( 'additional_data' ) ) { $response['data'] = $additional_data; } return array( 'status_code' => $status_code, 'errors' => $response, ); } function output_error( $error ) { $error_response = $this->serializable_error( $error ); return $this->output( $error_response['status_code'], $error_response['errors'] ); } function filter_fields( $response ) { if ( empty( $this->query['fields'] ) || ( is_array( $response ) && ! empty( $response['error'] ) ) || ! empty( $this->endpoint->custom_fields_filtering ) ) { return $response; } $fields = array_map( 'trim', explode( ',', $this->query['fields'] ) ); if ( is_object( $response ) ) { $response = (array) $response; } $has_filtered = false; if ( is_array( $response ) && empty( $response['ID'] ) ) { $keys_to_filter = array( 'categories', 'comments', 'connections', 'domains', 'groups', 'likes', 'media', 'notes', 'posts', 'services', 'sites', 'suggestions', 'tags', 'themes', 'topics', 'users', ); foreach ( $keys_to_filter as $key_to_filter ) { if ( ! isset( $response[ $key_to_filter ] ) || $has_filtered ) { continue; } foreach ( $response[ $key_to_filter ] as $key => $values ) { if ( is_object( $values ) ) { if ( is_object( $response[ $key_to_filter ] ) ) { $response[ $key_to_filter ]->$key = (object) array_intersect_key( ( (array) $values ), array_flip( $fields ) ); } elseif ( is_array( $response[ $key_to_filter ] ) ) { $response[ $key_to_filter ][ $key ] = (object) array_intersect_key( ( (array) $values ), array_flip( $fields ) ); } } elseif ( is_array( $values ) ) { $response[ $key_to_filter ][ $key ] = array_intersect_key( $values, array_flip( $fields ) ); } } $has_filtered = true; } } if ( ! $has_filtered ) { if ( is_object( $response ) ) { $response = (object) array_intersect_key( (array) $response, array_flip( $fields ) ); } elseif ( is_array( $response ) ) { $response = array_intersect_key( $response, array_flip( $fields ) ); } } return $response; } function ensure_http_scheme_of_home_url( $url, $path, $original_scheme ) { if ( $original_scheme ) { return $url; } return preg_replace( '#^https:#', 'http:', $url ); } function comment_edit_pre( $comment_content ) { return htmlspecialchars_decode( $comment_content, ENT_QUOTES ); } function json_encode( $data ) { return wp_json_encode( $data ); } function ends_with( $haystack, $needle ) { return $needle === substr( $haystack, -strlen( $needle ) ); } // Returns the site's blog_id in the WP.com ecosystem function get_blog_id_for_output() { return $this->token_details['blog_id']; } // Returns the site's local blog_id function get_blog_id( $blog_id ) { return $GLOBALS['blog_id']; } function switch_to_blog_and_validate_user( $blog_id = 0, $verify_token_for_blog = true ) { if ( $this->is_restricted_blog( $blog_id ) ) { return new WP_Error( 'unauthorized', 'User cannot access this restricted blog', 403 ); } /** * If this is a private site we check for 2 things: * 1. In case of user based authentication, we need to check if the logged-in user has the 'read' capability. * 2. In case of site based authentication, make sure the endpoint accepts it. */ if ( -1 === (int) get_option( 'blog_public' ) && ! current_user_can( 'read' ) && ! $this->endpoint->accepts_site_based_authentication() ) { return new WP_Error( 'unauthorized', 'User cannot access this private blog.', 403 ); } return $blog_id; } // Returns true if the specified blog ID is a restricted blog function is_restricted_blog( $blog_id ) { /** * Filters all REST API access and return a 403 unauthorized response for all Restricted blog IDs. * * @module json-api * * @since 3.4.0 * * @param array $array Array of Blog IDs. */ $restricted_blog_ids = apply_filters( 'wpcom_json_api_restricted_blog_ids', array() ); return true === in_array( $blog_id, $restricted_blog_ids ); } function post_like_count( $blog_id, $post_id ) { return 0; } function is_liked( $blog_id, $post_id ) { return false; } function is_reblogged( $blog_id, $post_id ) { return false; } function is_following( $blog_id ) { return false; } function add_global_ID( $blog_id, $post_id ) { return ''; } function get_avatar_url( $email, $avatar_size = null ) { if ( function_exists( 'wpcom_get_avatar_url' ) ) { return null === $avatar_size ? wpcom_get_avatar_url( $email ) : wpcom_get_avatar_url( $email, $avatar_size ); } else { return null === $avatar_size ? get_avatar_url( $email ) : get_avatar_url( $email, $avatar_size ); } } /** * Counts the number of comments on a site, excluding certain comment types. * * @param $post_id int Post ID. * @return array Array of counts, matching the output of https://developer.wordpress.org/reference/functions/get_comment_count/. */ public function wp_count_comments( $post_id ) { global $wpdb; if ( 0 !== $post_id ) { return wp_count_comments( $post_id ); } $counts = array( 'total_comments' => 0, 'all' => 0, ); /** * Exclude certain comment types from comment counts in the REST API. * * @since 6.9.0 * @module json-api * * @param array Array of comment types to exclude (default: 'order_note', 'webhook_delivery', 'review', 'action_log') */ $exclude = apply_filters( 'jetpack_api_exclude_comment_types_count', array( 'order_note', 'webhook_delivery', 'review', 'action_log' ) ); if ( empty( $exclude ) ) { return wp_count_comments( $post_id ); } array_walk( $exclude, 'esc_sql' ); $where = sprintf( "WHERE comment_type NOT IN ( '%s' )", implode( "','", $exclude ) ); $count = $wpdb->get_results( "SELECT comment_approved, COUNT(*) AS num_comments FROM $wpdb->comments {$where} GROUP BY comment_approved " ); $approved = array( '0' => 'moderated', '1' => 'approved', 'spam' => 'spam', 'trash' => 'trash', 'post-trashed' => 'post-trashed', ); // https://developer.wordpress.org/reference/functions/get_comment_count/#source foreach ( $count as $row ) { if ( ! in_array( $row->comment_approved, array( 'post-trashed', 'trash', 'spam' ), true ) ) { $counts['all'] += $row->num_comments; $counts['total_comments'] += $row->num_comments; } elseif ( ! in_array( $row->comment_approved, array( 'post-trashed', 'trash' ), true ) ) { $counts['total_comments'] += $row->num_comments; } if ( isset( $approved[ $row->comment_approved ] ) ) { $counts[ $approved[ $row->comment_approved ] ] = $row->num_comments; } } foreach ( $approved as $key ) { if ( empty( $counts[ $key ] ) ) { $counts[ $key ] = 0; } } $counts = (object) $counts; return $counts; } /** * traps `wp_die()` calls and outputs a JSON response instead. * The result is always output, never returned. * * @param string|null $error_code Call with string to start the trapping. Call with null to stop. * @param int $http_status HTTP status code, 400 by default. */ function trap_wp_die( $error_code = null, $http_status = 400 ) { // Determine the filter name; based on the conditionals inside the wp_die function. if ( wp_is_json_request() ) { $die_handler = 'wp_die_json_handler'; } elseif ( wp_is_jsonp_request() ) { $die_handler = 'wp_die_jsonp_handler'; } elseif ( wp_is_xml_request() ) { $die_handler = 'wp_die_xml_handler'; } else { $die_handler = 'wp_die_handler'; } if ( is_null( $error_code ) ) { $this->trapped_error = null; // Stop trapping remove_filter( $die_handler, array( $this, 'wp_die_handler_callback' ) ); return; } // If API called via PHP, bail: don't do our custom wp_die(). Do the normal wp_die(). if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) { if ( ! defined( 'REST_API_REQUEST' ) || ! REST_API_REQUEST ) { return; } } else { if ( ! defined( 'XMLRPC_REQUEST' ) || ! XMLRPC_REQUEST ) { return; } } $this->trapped_error = array( 'status' => $http_status, 'code' => $error_code, 'message' => '', ); // Start trapping add_filter( $die_handler, array( $this, 'wp_die_handler_callback' ) ); } function wp_die_handler_callback() { return array( $this, 'wp_die_handler' ); } function wp_die_handler( $message, $title = '', $args = array() ) { // Allow wp_die calls to override HTTP status code... $args = wp_parse_args( $args, array( 'response' => $this->trapped_error['status'], ) ); // ... unless it's 500 if ( (int) $args['response'] !== 500 ) { $this->trapped_error['status'] = $args['response']; } if ( $title ) { $message = "$title: $message"; } $this->trapped_error['message'] = wp_kses( $message, array() ); switch ( $this->trapped_error['code'] ) { case 'comment_failure': if ( did_action( 'comment_duplicate_trigger' ) ) { $this->trapped_error['code'] = 'comment_duplicate'; } elseif ( did_action( 'comment_flood_trigger' ) ) { $this->trapped_error['code'] = 'comment_flood'; } break; } // We still want to exit so that code execution stops where it should. // Attach the JSON output to the WordPress shutdown handler add_action( 'shutdown', array( $this, 'output_trapped_error' ), 0 ); exit; } function output_trapped_error() { $this->exit = false; // We're already exiting once. Don't do it twice. $this->output( $this->trapped_error['status'], (object) array( 'error' => $this->trapped_error['code'], 'message' => $this->trapped_error['message'], ) ); } function finish_request() { if ( function_exists( 'fastcgi_finish_request' ) ) { return fastcgi_finish_request(); } } }
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