693 lines
19 KiB
PHP
693 lines
19 KiB
PHP
<?php
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defined( 'WPCOM_JSON_API__DEBUG' ) or define( 'WPCOM_JSON_API__DEBUG', false );
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require_once dirname( __FILE__ ) . '/sal/class.json-api-platform.php';
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class WPCOM_JSON_API {
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static $self = null;
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public $endpoints = array();
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public $token_details = array();
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public $method = '';
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public $url = '';
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public $path = '';
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public $version = null;
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public $query = array();
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public $post_body = null;
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public $files = null;
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public $content_type = null;
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public $accept = '';
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public $_server_https;
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public $exit = true;
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public $public_api_scheme = 'https';
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public $output_status_code = 200;
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public $trapped_error = null;
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public $did_output = false;
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/**
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* @return WPCOM_JSON_API instance
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*/
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static function init( $method = null, $url = null, $post_body = null ) {
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if ( !self::$self ) {
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$class = function_exists( 'get_called_class' ) ? get_called_class() : __CLASS__;
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self::$self = new $class( $method, $url, $post_body );
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}
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return self::$self;
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}
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function add( WPCOM_JSON_API_Endpoint $endpoint ) {
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$path_versions = serialize( array (
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$endpoint->path,
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$endpoint->min_version,
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$endpoint->max_version,
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) );
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if ( !isset( $this->endpoints[$path_versions] ) ) {
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$this->endpoints[$path_versions] = array();
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}
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$this->endpoints[$path_versions][$endpoint->method] = $endpoint;
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}
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static function is_truthy( $value ) {
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switch ( strtolower( (string) $value ) ) {
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case '1' :
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case 't' :
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case 'true' :
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return true;
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}
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return false;
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}
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static function is_falsy( $value ) {
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switch ( strtolower( (string) $value ) ) {
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case '0' :
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case 'f' :
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case 'false' :
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return true;
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}
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return false;
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}
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function __construct() {
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$args = func_get_args();
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call_user_func_array( array( $this, 'setup_inputs' ), $args );
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}
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function setup_inputs( $method = null, $url = null, $post_body = null ) {
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if ( is_null( $method ) ) {
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$this->method = strtoupper( $_SERVER['REQUEST_METHOD'] );
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} else {
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$this->method = strtoupper( $method );
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}
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if ( is_null( $url ) ) {
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$this->url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
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} else {
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$this->url = $url;
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}
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$parsed = parse_url( $this->url );
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$this->path = $parsed['path'];
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if ( !empty( $parsed['query'] ) ) {
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wp_parse_str( $parsed['query'], $this->query );
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}
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if ( isset( $_SERVER['HTTP_ACCEPT'] ) && $_SERVER['HTTP_ACCEPT'] ) {
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$this->accept = $_SERVER['HTTP_ACCEPT'];
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}
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if ( 'POST' === $this->method ) {
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if ( is_null( $post_body ) ) {
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$this->post_body = file_get_contents( 'php://input' );
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if ( isset( $_SERVER['HTTP_CONTENT_TYPE'] ) && $_SERVER['HTTP_CONTENT_TYPE'] ) {
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$this->content_type = $_SERVER['HTTP_CONTENT_TYPE'];
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} elseif ( isset( $_SERVER['CONTENT_TYPE'] ) && $_SERVER['CONTENT_TYPE'] ) {
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$this->content_type = $_SERVER['CONTENT_TYPE'] ;
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} elseif ( '{' === $this->post_body[0] ) {
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$this->content_type = 'application/json';
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} else {
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$this->content_type = 'application/x-www-form-urlencoded';
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}
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if ( 0 === strpos( strtolower( $this->content_type ), 'multipart/' ) ) {
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$this->post_body = http_build_query( stripslashes_deep( $_POST ) );
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$this->files = $_FILES;
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$this->content_type = 'multipart/form-data';
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}
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} else {
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$this->post_body = $post_body;
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$this->content_type = '{' === isset( $this->post_body[0] ) && $this->post_body[0] ? 'application/json' : 'application/x-www-form-urlencoded';
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}
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} else {
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$this->post_body = null;
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$this->content_type = null;
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}
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$this->_server_https = array_key_exists( 'HTTPS', $_SERVER ) ? $_SERVER['HTTPS'] : '--UNset--';
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}
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function initialize() {
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$this->token_details['blog_id'] = Jetpack_Options::get_option( 'id' );
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}
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function serve( $exit = true ) {
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ini_set( 'display_errors', false );
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$this->exit = (bool) $exit;
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// This was causing problems with Jetpack, but is necessary for wpcom
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// @see https://github.com/Automattic/jetpack/pull/2603
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// @see r124548-wpcom
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if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
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add_filter( 'home_url', array( $this, 'ensure_http_scheme_of_home_url' ), 10, 3 );
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}
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add_filter( 'user_can_richedit', '__return_true' );
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add_filter( 'comment_edit_pre', array( $this, 'comment_edit_pre' ) );
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$initialization = $this->initialize();
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if ( 'OPTIONS' == $this->method ) {
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/**
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* Fires before the page output.
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* Can be used to specify custom header options.
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*
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* @module json-api
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*
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* @since 3.1.0
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*/
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do_action( 'wpcom_json_api_options' );
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return $this->output( 200, '', 'plain/text' );
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}
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if ( is_wp_error( $initialization ) ) {
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$this->output_error( $initialization );
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return;
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}
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// Normalize path and extract API version
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$this->path = untrailingslashit( $this->path );
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preg_match( '#^/rest/v(\d+(\.\d+)*)#', $this->path, $matches );
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$this->path = substr( $this->path, strlen( $matches[0] ) );
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$this->version = $matches[1];
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$allowed_methods = array( 'GET', 'POST' );
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$four_oh_five = false;
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$is_help = preg_match( '#/help/?$#i', $this->path );
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$matching_endpoints = array();
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if ( $is_help ) {
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$origin = get_http_origin();
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if ( !empty( $origin ) && 'GET' == $this->method ) {
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header( 'Access-Control-Allow-Origin: ' . esc_url_raw( $origin ) );
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}
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$this->path = substr( rtrim( $this->path, '/' ), 0, -5 );
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// Show help for all matching endpoints regardless of method
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$methods = $allowed_methods;
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$find_all_matching_endpoints = true;
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// How deep to truncate each endpoint's path to see if it matches this help request
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$depth = substr_count( $this->path, '/' ) + 1;
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if ( false !== stripos( $this->accept, 'javascript' ) || false !== stripos( $this->accept, 'json' ) ) {
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$help_content_type = 'json';
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} else {
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$help_content_type = 'html';
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}
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} else {
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if ( in_array( $this->method, $allowed_methods ) ) {
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// Only serve requested method
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$methods = array( $this->method );
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$find_all_matching_endpoints = false;
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} else {
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// We don't allow this requested method - find matching endpoints and send 405
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$methods = $allowed_methods;
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$find_all_matching_endpoints = true;
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$four_oh_five = true;
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}
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}
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// Find which endpoint to serve
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$found = false;
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foreach ( $this->endpoints as $endpoint_path_versions => $endpoints_by_method ) {
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$endpoint_path_versions = unserialize( $endpoint_path_versions );
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$endpoint_path = $endpoint_path_versions[0];
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$endpoint_min_version = $endpoint_path_versions[1];
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$endpoint_max_version = $endpoint_path_versions[2];
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// Make sure max_version is not less than min_version
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if ( version_compare( $endpoint_max_version, $endpoint_min_version, '<' ) ) {
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$endpoint_max_version = $endpoint_min_version;
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}
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foreach ( $methods as $method ) {
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if ( !isset( $endpoints_by_method[$method] ) ) {
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continue;
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}
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// Normalize
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$endpoint_path = untrailingslashit( $endpoint_path );
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if ( $is_help ) {
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// Truncate path at help depth
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$endpoint_path = join( '/', array_slice( explode( '/', $endpoint_path ), 0, $depth ) );
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}
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// Generate regular expression from sprintf()
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$endpoint_path_regex = str_replace( array( '%s', '%d' ), array( '([^/?&]+)', '(\d+)' ), $endpoint_path );
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if ( !preg_match( "#^$endpoint_path_regex\$#", $this->path, $path_pieces ) ) {
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// This endpoint does not match the requested path.
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continue;
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}
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if ( version_compare( $this->version, $endpoint_min_version, '<' ) || version_compare( $this->version, $endpoint_max_version, '>' ) ) {
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// This endpoint does not match the requested version.
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continue;
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}
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$found = true;
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if ( $find_all_matching_endpoints ) {
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$matching_endpoints[] = array( $endpoints_by_method[$method], $path_pieces );
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} else {
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// The method parameters are now in $path_pieces
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$endpoint = $endpoints_by_method[$method];
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break 2;
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}
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}
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}
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if ( !$found ) {
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return $this->output( 404, '', 'text/plain' );
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}
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if ( $four_oh_five ) {
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$allowed_methods = array();
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foreach ( $matching_endpoints as $matching_endpoint ) {
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$allowed_methods[] = $matching_endpoint[0]->method;
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}
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header( 'Allow: ' . strtoupper( join( ',', array_unique( $allowed_methods ) ) ) );
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return $this->output( 405, array( 'error' => 'not_allowed', 'error_message' => 'Method not allowed' ) );
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}
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if ( $is_help ) {
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/**
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* Fires before the API output.
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*
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* @since 1.9.0
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*
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* @param string help.
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*/
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do_action( 'wpcom_json_api_output', 'help' );
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if ( 'json' === $help_content_type ) {
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$docs = array();
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foreach ( $matching_endpoints as $matching_endpoint ) {
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if ( $matching_endpoint[0]->is_publicly_documentable() || WPCOM_JSON_API__DEBUG )
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$docs[] = call_user_func( array( $matching_endpoint[0], 'generate_documentation' ) );
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}
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return $this->output( 200, $docs );
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} else {
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status_header( 200 );
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foreach ( $matching_endpoints as $matching_endpoint ) {
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if ( $matching_endpoint[0]->is_publicly_documentable() || WPCOM_JSON_API__DEBUG )
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call_user_func( array( $matching_endpoint[0], 'document' ) );
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}
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}
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exit;
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}
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if ( $endpoint->in_testing && !WPCOM_JSON_API__DEBUG ) {
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return $this->output( 404, '', 'text/plain' );
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}
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/** This action is documented in class.json-api.php */
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do_action( 'wpcom_json_api_output', $endpoint->stat );
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$response = $this->process_request( $endpoint, $path_pieces );
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if ( !$response && !is_array( $response ) ) {
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return $this->output( 500, '', 'text/plain' );
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} elseif ( is_wp_error( $response ) ) {
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return $this->output_error( $response );
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}
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$output_status_code = $this->output_status_code;
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$this->set_output_status_code();
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return $this->output( $output_status_code, $response );
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}
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function process_request( WPCOM_JSON_API_Endpoint $endpoint, $path_pieces ) {
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$this->endpoint = $endpoint;
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return call_user_func_array( array( $endpoint, 'callback' ), $path_pieces );
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}
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function output_early( $status_code, $response = null, $content_type = 'application/json' ) {
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$exit = $this->exit;
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$this->exit = false;
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if ( is_wp_error( $response ) )
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$this->output_error( $response );
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else
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$this->output( $status_code, $response, $content_type );
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$this->exit = $exit;
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if ( ! defined( 'XMLRPC_REQUEST' ) || ! XMLRPC_REQUEST ) {
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$this->finish_request();
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}
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}
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function set_output_status_code( $code = 200 ) {
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$this->output_status_code = $code;
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}
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function output( $status_code, $response = null, $content_type = 'application/json' ) {
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// In case output() was called before the callback returned
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if ( $this->did_output ) {
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if ( $this->exit )
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exit;
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return $content_type;
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}
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$this->did_output = true;
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// 400s and 404s are allowed for all origins
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if ( 404 == $status_code || 400 == $status_code )
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header( 'Access-Control-Allow-Origin: *' );
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if ( is_null( $response ) ) {
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$response = new stdClass;
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}
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if ( 'text/plain' === $content_type ) {
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status_header( (int) $status_code );
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header( 'Content-Type: text/plain' );
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echo $response;
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if ( $this->exit ) {
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exit;
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}
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return $content_type;
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}
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$response = $this->filter_fields( $response );
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if ( isset( $this->query['http_envelope'] ) && self::is_truthy( $this->query['http_envelope'] ) ) {
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$response = array(
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'code' => (int) $status_code,
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'headers' => array(
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array(
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'name' => 'Content-Type',
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'value' => $content_type,
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),
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),
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'body' => $response,
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);
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$status_code = 200;
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$content_type = 'application/json';
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}
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status_header( (int) $status_code );
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header( "Content-Type: $content_type" );
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if ( isset( $this->query['callback'] ) && is_string( $this->query['callback'] ) ) {
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$callback = preg_replace( '/[^a-z0-9_.]/i', '', $this->query['callback'] );
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} else {
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$callback = false;
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}
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if ( $callback ) {
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// Mitigate Rosetta Flash [1] by setting the Content-Type-Options: nosniff header
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// and by prepending the JSONP response with a JS comment.
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// [1] http://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/
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echo "/**/$callback(";
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}
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echo $this->json_encode( $response );
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if ( $callback ) {
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echo ");";
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}
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if ( $this->exit ) {
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exit;
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}
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return $content_type;
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}
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public static function serializable_error ( $error ) {
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$status_code = $error->get_error_data();
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if ( is_array( $status_code ) )
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$status_code = $status_code['status_code'];
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if ( !$status_code ) {
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$status_code = 400;
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}
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$response = array(
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'error' => $error->get_error_code(),
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'message' => $error->get_error_message(),
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);
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return array(
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'status_code' => $status_code,
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'errors' => $response
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);
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}
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function output_error( $error ) {
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if ( function_exists( 'bump_stats_extra' ) ) {
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$client_id = ! empty( $this->token_details['client_id'] ) ? $this->token_details['client_id'] : 0;
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bump_stats_extra( 'rest-api-errors', $client_id );
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}
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$error_response = $this->serializable_error( $error );
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return $this->output( $error_response[ 'status_code'], $error_response['errors'] );
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}
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function filter_fields( $response ) {
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if ( empty( $this->query['fields'] ) || ( is_array( $response ) && ! empty( $response['error'] ) ) || ! empty( $this->endpoint->custom_fields_filtering ) )
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return $response;
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$fields = array_map( 'trim', explode( ',', $this->query['fields'] ) );
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if ( is_object( $response ) ) {
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$response = (array) $response;
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}
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$has_filtered = false;
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if ( is_array( $response ) && empty( $response['ID'] ) ) {
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$keys_to_filter = array(
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'categories',
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'comments',
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'connections',
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'domains',
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'groups',
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'likes',
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'media',
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'notes',
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'posts',
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'services',
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'sites',
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'suggestions',
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'tags',
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'themes',
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'topics',
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'users',
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);
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foreach ( $keys_to_filter as $key_to_filter ) {
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if ( ! isset( $response[ $key_to_filter ] ) || $has_filtered )
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continue;
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foreach ( $response[ $key_to_filter ] as $key => $values ) {
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if ( is_object( $values ) ) {
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$response[ $key_to_filter ][ $key ] = (object) array_intersect_key( (array) $values, array_flip( $fields ) );
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} elseif ( is_array( $values ) ) {
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$response[ $key_to_filter ][ $key ] = array_intersect_key( $values, array_flip( $fields ) );
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}
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}
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$has_filtered = true;
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}
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}
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if ( ! $has_filtered ) {
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if ( is_object( $response ) ) {
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$response = (object) array_intersect_key( (array) $response, array_flip( $fields ) );
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} else if ( 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 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 ( -1 == get_option( 'blog_public' ) && !current_user_can( 'read' ) ) {
|
|
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 = 96 ) {
|
|
add_filter( 'pre_option_show_avatars', '__return_true', 999 );
|
|
$_SERVER['HTTPS'] = 'off';
|
|
|
|
$avatar_img_element = get_avatar( $email, $avatar_size, '' );
|
|
|
|
if ( !$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";
|
|
}
|
|
|
|
switch ( $this->trapped_error['code'] ) {
|
|
case 'comment_failure' :
|
|
if ( did_action( 'comment_duplicate_trigger' ) ) {
|
|
$this->trapped_error['code'] = 'comment_duplicate';
|
|
} else if ( did_action( 'comment_flood_trigger' ) ) {
|
|
$this->trapped_error['code'] = 'comment_flood';
|
|
}
|
|
break;
|
|
}
|
|
|
|
$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'],
|
|
) );
|
|
}
|
|
|
|
function finish_request() {
|
|
if ( function_exists( 'fastcgi_finish_request' ) )
|
|
return fastcgi_finish_request();
|
|
}
|
|
}
|