diff options
Diffstat (limited to 'plugins/jetpack/class.json-api.php')
| -rw-r--r-- | plugins/jetpack/class.json-api.php | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/plugins/jetpack/class.json-api.php b/plugins/jetpack/class.json-api.php new file mode 100644 index 00000000..5a322eb6 --- /dev/null +++ b/plugins/jetpack/class.json-api.php @@ -0,0 +1,443 @@ +<?php + +defined( 'WPCOM_JSON_API__DEBUG' ) or define( 'WPCOM_JSON_API__DEBUG', false ); + +class WPCOM_JSON_API { + static $self = null; + + var $endpoints = array(); + + var $token_details = array(); + + var $method = ''; + var $url = ''; + var $path = ''; + var $query = array(); + var $post_body = null; + var $files = null; + var $content_type = null; + var $accept = ''; + + var $_server_https; + var $exit = true; + var $public_api_scheme = 'https'; + + var $trapped_error = null; + + static function init( $method = null, $url = null, $post_body = null ) { + if ( !self::$self ) { + $class = function_exists( 'get_called_class' ) ? get_called_class() : __CLASS__; + self::$self = new $class( $method, $url, $post_body ); + } + return self::$self; + } + + function add( WPCOM_JSON_API_Endpoint $endpoint ) { + if ( !isset( $this->endpoints[$endpoint->path] ) ) { + $this->endpoints[$endpoint->path] = array(); + } + $this->endpoints[$endpoint->path][$endpoint->method] = $endpoint; + } + + static function is_truthy( $value ) { + switch ( strtolower( (string) $value ) ) { + case '1' : + case 't' : + case 'true' : + return true; + } + + return false; + } + + function __construct() { + $args = func_get_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 = ( is_ssl() ? 'https' : 'http' ) . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; + } else { + $this->url = $url; + } + + $parsed = parse_url( $this->url ); + $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 = '{' === $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::get_option( 'id' ); + } + + function serve( $exit = true ) { + $this->exit = (bool) $exit; + + 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' ) ); + + $this->initialize(); + + // Normalize path + $this->path = untrailingslashit( $this->path ); + $this->path = preg_replace( '#^/rest/v1#', '', $this->path ); + + $allowed_methods = array( 'GET', 'POST' ); + $four_oh_five = false; + + $is_help = preg_match( '#/help/?$#i', $this->path ); + $matching_endpoints = array(); + + if ( $is_help ) { + $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 => $endpoints_by_method ) { + 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; + } + + $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 ) { + do_action( 'wpcom_json_api_output', 'help' ); + if ( 'json' === $help_content_type ) { + $docs = array(); + foreach ( $matching_endpoints as $matching_endpoint ) { + if ( !$matching_endpoint[0]->in_testing || 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]->in_testing || 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' ); + } + + do_action( 'wpcom_json_api_output', $endpoint->stat ); + + $response = $this->process_request( $endpoint, $path_pieces ); + + if ( !$response ) { + return $this->output( 500, '', 'text/plain' ); + } elseif ( is_wp_error( $response ) ) { + $status_code = $response->get_error_data(); + if ( !$status_code ) { + $status_code = 400; + } + $response = array( + 'error' => $response->get_error_code(), + 'message' => $response->get_error_message(), + ); + return $this->output( $status_code, $response ); + } + + return $this->output( 200, $response ); + } + + function process_request( WPCOM_JSON_API_Endpoint $endpoint, $path_pieces ) { + return call_user_func_array( array( $endpoint, 'callback' ), $path_pieces ); + } + + function output( $status_code, $response = null, $content_type = 'application/json' ) { + if ( is_null( $response ) ) { + $response = new stdClass; + } + + if ( 'text/plain' === $content_type ) { + status_header( (int) $status_code ); + header( 'Content-Type: text/plain' ); + echo $response; + if ( $this->exit ) { + exit; + } + + return $content_type; + } + + if ( isset( $this->query['http_envelope'] ) && self::is_truthy( $this->query['http_envelope'] ) ) { + $response = array( + 'code' => (int) $status_code, + 'headers' => array( + array( + 'name' => 'Content-Type', + 'value' => $content_type, + ), + ), + '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 ( $callback ) { + echo "$callback("; + } + echo $this->json_encode( $response ); + if ( $callback ) { + echo ");"; + } + + if ( $this->exit ) { + exit; + } + + return $content_type; + } + + 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 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 ( -1 == get_option( 'blog_public' ) && !current_user_can( 'read' ) ) { + return new WP_Error( 'unauthorized', 'User cannot access this private blog.', 403 ); + } + + return $blog_id; + } + + function post_like_count( $blog_id, $post_id ) { + return 0; + } + + function get_avatar_url( $email ) { + add_filter( 'pre_option_show_avatars', '__return_true', 999 ); + $_SERVER['HTTPS'] = 'off'; + + $avatar_img_element = get_avatar( $email, 96, '' ); + + if ( !$avatar_img_element || is_wp_error( $avatar_img_element ) ) { + $return = ''; + } elseif ( !preg_match( '#src=([\'"])?(.*?)(?(1)\\1|\s)#', $avatar_img_element, $matches ) ) { + $return = ''; + } else { + $return = esc_url_raw( htmlspecialchars_decode( $matches[2] ) ); + } + + remove_filter( 'pre_option_show_avatars', '__return_true', 999 ); + if ( '--UNset--' === $this->_server_https ) { + unset( $_SERVER['HTTPS'] ); + } else { + $_SERVER['HTTPS'] = $this->_server_https; + } + + return $return; + } + + /** + * 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. + */ + function trap_wp_die( $error_code = null ) { + // Stop trapping + if ( is_null( $error_code ) ) { + $this->trapped_error = null; + remove_filter( 'wp_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; + } + } + + // Start trapping + $this->trapped_error = array( + 'status' => 500, + 'code' => $error_code, + 'message' => '', + ); + + add_filter( 'wp_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() ) { + $args = wp_parse_args( $args, array( + 'response' => 500, + ) ); + + if ( $title ) { + $message = "$title: $message"; + } + + $this->trapped_error['status'] = $args['response']; + $this->trapped_error['message'] = wp_kses( $message, array() ); + + // We still want to exit so that code execution stops where it should. + // Attach the JSON output to 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'], + ) ); + } +} |