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<?php
/**
* Plugin Name: WP REST API
* Description: JSON-based REST API for WordPress, developed as part of GSoC 2013.
* Author: WP REST API Team
* Author URI: http://wp-api.org
* Version: 2.0-beta4
* Plugin URI: https://github.com/WP-API/WP-API
* License: GPL2+
*/
/**
* Version number for our API.
*
* @var string
*/
define( 'REST_API_VERSION', '2.0-beta4' );
/**
* Include our files for the API.
*/
include_once( dirname( __FILE__ ) . '/compatibility-v1.php' );
include_once( dirname( __FILE__ ) . '/lib/infrastructure/class-jsonserializable.php' );
include_once( dirname( __FILE__ ) . '/lib/infrastructure/class-wp-rest-server.php' );
include_once( dirname( __FILE__ ) . '/lib/infrastructure/class-wp-http-responseinterface.php' );
include_once( dirname( __FILE__ ) . '/lib/infrastructure/class-wp-http-response.php' );
include_once( dirname( __FILE__ ) . '/lib/infrastructure/class-wp-rest-response.php' );
require_once( dirname( __FILE__ ) . '/lib/infrastructure/class-wp-rest-request.php' );
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-posts-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-attachments-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-post-types-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-post-statuses-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-revisions-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-taxonomies-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-terms-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-users-controller.php';
require_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-comments-controller.php';
include_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-meta-controller.php';
include_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-meta-posts-controller.php';
include_once dirname( __FILE__ ) . '/lib/endpoints/class-wp-rest-posts-terms-controller.php';
include_once( dirname( __FILE__ ) . '/extras.php' );
/**
* Register a REST API route
*
* @param string $namespace The first URL segment after core prefix. Should be unique to your package/plugin.
* @param string $route The base URL for route you are adding.
* @param array $args Either an array of options for the endpoint, or an array of arrays for multiple methods
* @param boolean $override If the route already exists, should we override it? True overrides, false merges (with newer overriding if duplicate keys exist)
*/
function register_rest_route( $namespace, $route, $args = array(), $override = false ) {
/** @var WP_REST_Server $wp_rest_server */
global $wp_rest_server;
if ( isset( $args['callback'] ) ) {
// Upgrade a single set to multiple
$args = array( $args );
}
$defaults = array(
'methods' => 'GET',
'callback' => null,
'args' => array(),
);
foreach ( $args as $key => &$arg_group ) {
if ( ! is_numeric( $arg_group ) ) {
// Route option, skip here
continue;
}
$arg_group = array_merge( $defaults, $arg_group );
}
if ( $namespace ) {
$full_route = '/' . trim( $namespace, '/' ) . '/' . trim( $route, '/' );
} else {
// Non-namespaced routes are not allowed, with the exception of the main
// and namespace indexes. If you really need to register a
// non-namespaced route, call `WP_REST_Server::register_route` directly.
_doing_it_wrong( 'register_rest_route', 'Routes must be namespaced with plugin name and version', 'WPAPI-2.0' );
$full_route = '/' . trim( $route, '/' );
}
$wp_rest_server->register_route( $namespace, $full_route, $args, $override );
}
/**
* Register a new field on an existing WordPress object type
*
* @global array $wp_rest_additional_fields Holds registered fields, organized
* by object type.
*
* @param string|array $object_type Object(s) the field is being registered
* to, "post"|"term"|"comment" etc.
* @param string $attribute The attribute name.
* @param array $args {
* Optional. An array of arguments used to handle the registered field.
*
* @type string|array|null $get_callback Optional. The callback function
* used to retrieve the field
* value. Default is 'null', the
* field will not be returned in
* the response.
* @type string|array|null $update_callback Optional. The callback function
* used to set and update the
* field value. Default is 'null',
* the value cannot be set or
* updated.
* @type string|array|null schema Optional. The callback function
* used to create the schema for
* this field. Default is 'null',
* no schema entry will be
* returned.
* }
* @return bool|wp_error
*/
function register_api_field( $object_type, $attribute, $args = array() ) {
$defaults = array(
'get_callback' => null,
'update_callback' => null,
'schema' => null,
);
$args = wp_parse_args( $args, $defaults );
global $wp_rest_additional_fields;
$object_types = (array) $object_type;
foreach ( $object_types as $object_type ) {
$wp_rest_additional_fields[ $object_type ][ $attribute ] = $args;
}
}
/**
* Add the extra Post Type registration arguments we need
* These attributes will eventually be committed to core.
*/
function _add_extra_api_post_type_arguments() {
global $wp_post_types;
$wp_post_types['post']->show_in_rest = true;
$wp_post_types['post']->rest_base = 'posts';
$wp_post_types['post']->rest_controller_class = 'WP_REST_Posts_Controller';
$wp_post_types['page']->show_in_rest = true;
$wp_post_types['page']->rest_base = 'pages';
$wp_post_types['page']->rest_controller_class = 'WP_REST_Posts_Controller';
$wp_post_types['attachment']->show_in_rest = true;
$wp_post_types['attachment']->rest_base = 'media';
$wp_post_types['attachment']->rest_controller_class = 'WP_REST_Attachments_Controller';
}
add_action( 'init', '_add_extra_api_post_type_arguments', 11 );
/**
* Add the extra Taxonomy registration arguments we need.
* These attributes will eventually be committed to core.
*/
function _add_extra_api_taxonomy_arguments() {
global $wp_taxonomies;
if ( isset( $wp_taxonomies['category'] ) ) {
$wp_taxonomies['category']->show_in_rest = true;
$wp_taxonomies['category']->rest_base = 'category';
$wp_taxonomies['category']->rest_controller_class = 'WP_REST_Terms_Controller';
}
if ( isset( $wp_taxonomies['post_tag'] ) ) {
$wp_taxonomies['post_tag']->show_in_rest = true;
$wp_taxonomies['post_tag']->rest_base = 'tag';
$wp_taxonomies['post_tag']->rest_controller_class = 'WP_REST_Terms_Controller';
}
}
add_action( 'init', '_add_extra_api_taxonomy_arguments', 11 );
/**
* Register default REST API routes
*/
function create_initial_rest_routes() {
foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) {
$class = ! empty( $post_type->rest_controller_class ) ? $post_type->rest_controller_class : 'WP_REST_Posts_Controller';
if ( ! class_exists( $class ) ) {
continue;
}
$controller = new $class( $post_type->name );
if ( ! is_subclass_of( $controller, 'WP_REST_Controller' ) ) {
continue;
}
$controller->register_routes();
if ( post_type_supports( $post_type->name, 'custom-fields' ) ) {
$meta_controller = new WP_REST_Meta_Posts_Controller( $post_type->name );
$meta_controller->register_routes();
}
if ( post_type_supports( $post_type->name, 'revisions' ) ) {
$revisions_controller = new WP_REST_Revisions_Controller( $post_type->name );
$revisions_controller->register_routes();
}
foreach ( get_object_taxonomies( $post_type->name, 'objects' ) as $taxonomy ) {
if ( empty( $taxonomy->show_in_rest ) ) {
continue;
}
$posts_terms_controller = new WP_REST_Posts_Terms_Controller( $post_type->name, $taxonomy->name );
$posts_terms_controller->register_routes();
}
}
/*
* Post types
*/
$controller = new WP_REST_Post_Types_Controller;
$controller->register_routes();
/*
* Post statuses
*/
$controller = new WP_REST_Post_Statuses_Controller;
$controller->register_routes();
/*
* Taxonomies
*/
$controller = new WP_REST_Taxonomies_Controller;
$controller->register_routes();
/*
* Terms
*/
foreach ( get_taxonomies( array( 'show_in_rest' => true ), 'object' ) as $taxonomy ) {
$class = ! empty( $taxonomy->rest_controller_class ) ? $taxonomy->rest_controller_class : 'WP_REST_Terms_Controller';
if ( ! class_exists( $class ) ) {
continue;
}
$controller = new $class( $taxonomy->name );
if ( ! is_subclass_of( $controller, 'WP_REST_Controller' ) ) {
continue;
}
$controller->register_routes();
}
/*
* Users
*/
$controller = new WP_REST_Users_Controller;
$controller->register_routes();
/**
* Comments
*/
$controller = new WP_REST_Comments_Controller;
$controller->register_routes();
}
add_action( 'rest_api_init', 'create_initial_rest_routes', 0 );
/**
* Register rewrite rules for the API.
*
* @global WP $wp Current WordPress environment instance.
*/
function rest_api_init() {
rest_api_register_rewrites();
global $wp;
$wp->add_query_var( 'rest_route' );
}
add_action( 'init', 'rest_api_init' );
/**
* Add rewrite rules.
*/
function rest_api_register_rewrites() {
add_rewrite_rule( '^' . rest_get_url_prefix() . '/?$','index.php?rest_route=/','top' );
add_rewrite_rule( '^' . rest_get_url_prefix() . '(.*)?','index.php?rest_route=$matches[1]','top' );
}
/**
* Determine if the rewrite rules should be flushed.
*/
function rest_api_maybe_flush_rewrites() {
$version = get_option( 'rest_api_plugin_version', null );
if ( empty( $version ) || REST_API_VERSION !== $version ) {
flush_rewrite_rules();
update_option( 'rest_api_plugin_version', REST_API_VERSION );
}
}
add_action( 'init', 'rest_api_maybe_flush_rewrites', 999 );
/**
* Register the default REST API filters.
*
* @internal This will live in default-filters.php
*
* @global WP_REST_Posts $WP_REST_posts
* @global WP_REST_Pages $WP_REST_pages
* @global WP_REST_Media $WP_REST_media
* @global WP_REST_Taxonomies $WP_REST_taxonomies
*
* @param WP_REST_Server $server Server object.
*/
function rest_api_default_filters( $server ) {
// Deprecated reporting.
add_action( 'deprecated_function_run', 'rest_handle_deprecated_function', 10, 3 );
add_filter( 'deprecated_function_trigger_error', '__return_false' );
add_action( 'deprecated_argument_run', 'rest_handle_deprecated_argument', 10, 3 );
add_filter( 'deprecated_argument_trigger_error', '__return_false' );
// Default serving
add_filter( 'rest_pre_serve_request', 'rest_send_cors_headers' );
add_filter( 'rest_post_dispatch', 'rest_send_allow_header', 10, 3 );
add_filter( 'rest_pre_dispatch', 'rest_handle_options_request', 10, 3 );
}
add_action( 'rest_api_init', 'rest_api_default_filters', 10, 1 );
/**
* Load the REST API.
*
* @todo Extract code that should be unit tested into isolated methods such as
* the wp_rest_server_class filter and serving requests. This would also
* help for code re-use by `wp-json` endpoint. Note that we can't unit
* test any method that calls die().
*/
function rest_api_loaded() {
if ( empty( $GLOBALS['wp']->query_vars['rest_route'] ) ) {
return;
}
/**
* Whether this is a XML-RPC Request.
*
* @var bool
* @todo Remove me in favour of REST_REQUEST
*/
define( 'XMLRPC_REQUEST', true );
/**
* Whether this is a REST Request.
*
* @var bool
*/
define( 'REST_REQUEST', true );
/** @var WP_REST_Server $wp_rest_server */
global $wp_rest_server;
// Allow for a plugin to insert a different class to handle requests.
$wp_rest_server_class = apply_filters( 'wp_rest_server_class', 'WP_REST_Server' );
$wp_rest_server = new $wp_rest_server_class;
/**
* Fires when preparing to serve an API request.
*
* Endpoint objects should be created and register their hooks on this
* action rather than another action to ensure they're only loaded when
* needed.
*
* @param WP_REST_Server $wp_rest_server Server object.
*/
do_action( 'rest_api_init', $wp_rest_server );
// Fire off the request.
$wp_rest_server->serve_request( $GLOBALS['wp']->query_vars['rest_route'] );
// We're done.
die();
}
add_action( 'parse_request', 'rest_api_loaded' );
/**
* Register routes and flush the rewrite rules on activation.
*
* @param bool $network_wide ?
*/
function rest_api_activation( $network_wide ) {
if ( function_exists( 'is_multisite' ) && is_multisite() && $network_wide ) {
$mu_blogs = wp_get_sites();
foreach ( $mu_blogs as $mu_blog ) {
switch_to_blog( $mu_blog['blog_id'] );
rest_api_register_rewrites();
update_option( 'rest_api_plugin_version', null );
}
restore_current_blog();
} else {
rest_api_register_rewrites();
update_option( 'rest_api_plugin_version', null );
}
}
register_activation_hook( __FILE__, 'rest_api_activation' );
/**
* Flush the rewrite rules on deactivation.
*
* @param bool $network_wide ?
*/
function rest_api_deactivation( $network_wide ) {
if ( function_exists( 'is_multisite' ) && is_multisite() && $network_wide ) {
$mu_blogs = wp_get_sites();
foreach ( $mu_blogs as $mu_blog ) {
switch_to_blog( $mu_blog['blog_id'] );
delete_option( 'rest_api_plugin_version' );
}
restore_current_blog();
} else {
delete_option( 'rest_api_plugin_version' );
}
}
register_deactivation_hook( __FILE__, 'rest_api_deactivation' );
/**
* Get the URL prefix for any API resource.
*
* @return string Prefix.
*/
function rest_get_url_prefix() {
/**
* Filter the rest URL prefix.
*
* @since 1.0
*
* @param string $prefix URL prefix. Default 'wp-json'.
*/
return apply_filters( 'rest_url_prefix', 'wp-json' );
}
/**
* Get URL to a REST endpoint on a site.
*
* @todo Check if this is even necessary
*
* @param int $blog_id Blog ID. Optional. The ID of the multisite blog to get URL for. Default null of null returns URL for current blog.
* @param string $path Optional. REST route. Default empty.
* @param string $scheme Optional. Sanitization scheme. Default 'json'.
* @return string Full URL to the endpoint.
*/
function get_rest_url( $blog_id = null, $path = '/', $scheme = 'json' ) {
if ( empty( $path ) ) {
$path = '/';
}
if ( get_option( 'permalink_structure' ) ) {
$url = get_home_url( $blog_id, rest_get_url_prefix(), $scheme );
$url .= '/' . ltrim( $path, '/' );
} else {
$url = trailingslashit( get_home_url( $blog_id, '', $scheme ) );
$path = '/' . ltrim( $path, '/' );
$url = add_query_arg( 'rest_route', $path, $url );
}
/**
* Filter the REST URL.
*
* @since 1.0
*
* @param string $url REST URL.
* @param string $path REST route.
* @param int $blod_ig Blog ID.
* @param string $scheme Sanitization scheme.
*/
return apply_filters( 'rest_url', $url, $path, $blog_id, $scheme );
}
/**
* Get URL to a REST endpoint.
*
* @param string $path Optional. REST route. Default empty.
* @param string $scheme Optional. Sanitization scheme. Default 'json'.
* @return string Full URL to the endpoint.
*/
function rest_url( $path = '', $scheme = 'json' ) {
return get_rest_url( null, $path, $scheme );
}
/**
* Do a REST request.
* Used primarily to route internal requests through WP_REST_Server
*
* @param WP_REST_Request|string $request
* @return WP_REST_Response
*/
function rest_do_request( $request ) {
global $wp_rest_server;
$request = rest_ensure_request( $request );
return $wp_rest_server->dispatch( $request );
}
/**
* Ensure request arguments are a request object.
*
* This ensures that the request is consistent.
*
* @param array|WP_REST_Request $request Request to check.
* @return WP_REST_Request
*/
function rest_ensure_request( $request ) {
if ( $request instanceof WP_REST_Request ) {
return $request;
}
return new WP_REST_Request( 'GET', '', $request );
}
/**
* Ensure a REST response is a response object.
*
* This ensures that the response is consistent, and implements
* {@see WP_HTTP_ResponseInterface}, allowing usage of
* `set_status`/`header`/etc without needing to double-check the object. Will
* also allow {@see WP_Error} to indicate error responses, so users should
* immediately check for this value.
*
* @param WP_Error|WP_HTTP_ResponseInterface|mixed $response Response to check.
* @return WP_Error|WP_HTTP_ResponseInterface|WP_REST_Response WP_Error if response generated an error, WP_HTTP_ResponseInterface if response is a already an instance, otherwise returns a new WP_REST_Response instance.
*/
function rest_ensure_response( $response ) {
if ( is_wp_error( $response ) ) {
return $response;
}
if ( $response instanceof WP_HTTP_ResponseInterface ) {
return $response;
}
return new WP_REST_Response( $response );
}
/**
* Handle {@see _deprecated_function()} errors.
*
* @param string $function Function name.
* @param string $replacement Replacement function name.
* @param string $version Version.
*/
function rest_handle_deprecated_function( $function, $replacement, $version ) {
if ( ! empty( $replacement ) ) {
$string = sprintf( __( '%1$s (since %2$s; use %3$s instead)' ), $function, $version, $replacement );
} else {
$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function, $version );
}
header( sprintf( 'X-WP-DeprecatedFunction: %s', $string ) );
}
/**
* Handle {@see _deprecated_function} errors.
*
* @param string $function Function name.
* @param string $replacement Replacement function name.
* @param string $version Version.
*/
function rest_handle_deprecated_argument( $function, $replacement, $version ) {
if ( ! empty( $replacement ) ) {
$string = sprintf( __( '%1$s (since %2$s; %3$s)' ), $function, $version, $replacement );
} else {
$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function, $version );
}
header( sprintf( 'X-WP-DeprecatedParam: %s', $string ) );
}
/**
* Send Cross-Origin Resource Sharing headers with API requests
*
* @param mixed $value Response data
* @return mixed Response data
*/
function rest_send_cors_headers( $value ) {
$origin = get_http_origin();
if ( $origin ) {
header( 'Access-Control-Allow-Origin: ' . esc_url_raw( $origin ) );
header( 'Access-Control-Allow-Methods: POST, GET, OPTIONS, PUT, DELETE' );
header( 'Access-Control-Allow-Credentials: true' );
}
return $value;
}
/**
* Handle OPTIONS requests for the server
*
* This is handled outside of the server code, as it doesn't obey normal route
* mapping.
*
* @param mixed $response Current response, either response or `null` to indicate pass-through.
* @param WP_REST_Server $handler ResponseHandler instance (usually WP_REST_Server).
* @param WP_REST_Request $request The request that was used to make current response.
* @return WP_REST_Response $response Modified response, either response or `null` to indicate pass-through.
*/
function rest_handle_options_request( $response, $handler, $request ) {
if ( ! empty( $response ) || $request->get_method() !== 'OPTIONS' ) {
return $response;
}
$response = new WP_REST_Response();
$data = array();
$accept = array();
foreach ( $handler->get_routes() as $route => $endpoints ) {
$match = preg_match( '@^' . $route . '$@i', $request->get_route(), $args );
if ( ! $match ) {
continue;
}
$data = $handler->get_data_for_route( $route, $endpoints, 'help' );
$accept = array_merge( $accept, $data['methods'] );
break;
}
$response->header( 'Accept', implode( ', ', $accept ) );
$response->set_data( $data );
return $response;
}
/**
* Send the "Allow" header to state all methods that can be sen
* to the current route
*
* @param WP_REST_Response $response Current response being served.
* @param WP_REST_Server $server ResponseHandler instance (usually WP_REST_Server)
* @param WP_REST_Request $request The request that was used to make current response.
*/
function rest_send_allow_header( $response, $server, $request ) {
$matched_route = $response->get_matched_route();
if ( ! $matched_route ) {
return $response;
}
$routes = $server->get_routes();
$allowed_methods = array();
// get the allowed methods across the routes
foreach ( $routes[ $matched_route ] as $_handler ) {
foreach ( $_handler['methods'] as $handler_method => $value ) {
if ( ! empty( $_handler['permission_callback'] ) ) {
$permission = call_user_func( $_handler['permission_callback'], $request );
$allowed_methods[ $handler_method ] = true === $permission;
} else {
$allowed_methods[ $handler_method ] = true;
}
}
}
// strip out all the methods that are not allowed (false values)
$allowed_methods = array_filter( $allowed_methods );
if ( $allowed_methods ) {
$response->header( 'Allow', implode( ', ', array_map( 'strtoupper', array_keys( $allowed_methods ) ) ) );
}
return $response;
}
if ( ! function_exists( 'json_last_error_msg' ) ) :
/**
* Returns the error string of the last json_encode() or json_decode() call
*
* @internal This is a compatibility function for PHP <5.5
*
* @return boolean|string Returns the error message on success, "No Error" if no error has occurred, or FALSE on failure.
*/
function json_last_error_msg() {
// see https://core.trac.wordpress.org/ticket/27799
if ( ! function_exists( 'json_last_error' ) ) {
return false;
}
$last_error_code = json_last_error();
// just in case JSON_ERROR_NONE is not defined
$error_code_none = defined( 'JSON_ERROR_NONE' ) ? JSON_ERROR_NONE : 0;
switch ( true ) {
case $last_error_code === $error_code_none:
return 'No error';
case defined( 'JSON_ERROR_DEPTH' ) && JSON_ERROR_DEPTH === $last_error_code:
return 'Maximum stack depth exceeded';
case defined( 'JSON_ERROR_STATE_MISMATCH' ) && JSON_ERROR_STATE_MISMATCH === $last_error_code:
return 'State mismatch (invalid or malformed JSON)';
case defined( 'JSON_ERROR_CTRL_CHAR' ) && JSON_ERROR_CTRL_CHAR === $last_error_code:
return 'Control character error, possibly incorrectly encoded';
case defined( 'JSON_ERROR_SYNTAX' ) && JSON_ERROR_SYNTAX === $last_error_code:
return 'Syntax error';
case defined( 'JSON_ERROR_UTF8' ) && JSON_ERROR_UTF8 === $last_error_code:
return 'Malformed UTF-8 characters, possibly incorrectly encoded';
case defined( 'JSON_ERROR_RECURSION' ) && JSON_ERROR_RECURSION === $last_error_code:
return 'Recursion detected';
case defined( 'JSON_ERROR_INF_OR_NAN' ) && JSON_ERROR_INF_OR_NAN === $last_error_code:
return 'Inf and NaN cannot be JSON encoded';
case defined( 'JSON_ERROR_UNSUPPORTED_TYPE' ) && JSON_ERROR_UNSUPPORTED_TYPE === $last_error_code:
return 'Type is not supported';
default:
return 'An unknown error occurred';
}
}
endif;
/**
* Is the variable a list? (Numeric-indexed array)
*
* @param mixed $data Variable to check.
* @return boolean
*/
function rest_is_list( $data ) {
if ( ! is_array( $data ) ) {
return false;
}
$keys = array_keys( $data );
$string_keys = array_filter( $keys, 'is_string' );
return count( $string_keys ) === 0;
}