701 lines
19 KiB
PHP
701 lines
19 KiB
PHP
<?php
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/**
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* WooCommerce API
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*
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* Handles REST API requests
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*
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* This class and related code (JSON response handler, resource classes) are based on WP-API v0.6 (https://github.com/WP-API/WP-API)
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* Many thanks to Ryan McCue and any other contributors!
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*
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* @author WooThemes
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* @category API
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* @package WooCommerce/API
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* @since 2.1
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*/
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if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
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require_once ABSPATH . 'wp-admin/includes/admin.php';
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class WC_API_Server {
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const METHOD_GET = 1;
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const METHOD_POST = 2;
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const METHOD_PUT = 4;
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const METHOD_PATCH = 8;
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const METHOD_DELETE = 16;
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const READABLE = 1; // GET
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const CREATABLE = 2; // POST
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const EDITABLE = 14; // POST | PUT | PATCH
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const DELETABLE = 16; // DELETE
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const ALLMETHODS = 31; // GET | POST | PUT | PATCH | DELETE
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/**
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* Does the endpoint accept a raw request body?
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*/
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const ACCEPT_RAW_DATA = 64;
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/** Does the endpoint accept a request body? (either JSON or XML) */
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const ACCEPT_DATA = 128;
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/**
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* Should we hide this endpoint from the index?
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*/
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const HIDDEN_ENDPOINT = 256;
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/**
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* Map of HTTP verbs to constants
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* @var array
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*/
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public static $method_map = array(
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'HEAD' => self::METHOD_GET,
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'GET' => self::METHOD_GET,
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'POST' => self::METHOD_POST,
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'PUT' => self::METHOD_PUT,
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'PATCH' => self::METHOD_PATCH,
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'DELETE' => self::METHOD_DELETE,
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);
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/**
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* Requested path (relative to the API root, wp-json.php)
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*
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* @var string
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*/
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public $path = '';
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/**
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* Requested method (GET/HEAD/POST/PUT/PATCH/DELETE)
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*
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* @var string
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*/
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public $method = 'HEAD';
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/**
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* Request parameters
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*
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* This acts as an abstraction of the superglobals
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* (GET => $_GET, POST => $_POST)
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*
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* @var array
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*/
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public $params = array( 'GET' => array(), 'POST' => array() );
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/**
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* Request headers
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*
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* @var array
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*/
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public $headers = array();
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/**
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* Request files (matches $_FILES)
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*
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* @var array
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*/
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public $files = array();
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/**
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* Request/Response handler, either JSON by default
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* or XML if requested by client
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*
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* @var WC_API_Handler
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*/
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public $handler;
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/**
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* Setup class and set request/response handler
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*
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* @since 2.1
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* @param $path
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* @return WC_API_Server
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*/
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public function __construct( $path ) {
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if ( empty( $path ) ) {
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if ( isset( $_SERVER['PATH_INFO'] ) )
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$path = $_SERVER['PATH_INFO'];
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else
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$path = '/';
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}
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$this->path = $path;
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$this->method = $_SERVER['REQUEST_METHOD'];
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$this->params['GET'] = $_GET;
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$this->params['POST'] = $_POST;
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$this->headers = $this->get_headers( $_SERVER );
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$this->files = $_FILES;
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// Compatibility for clients that can't use PUT/PATCH/DELETE
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if ( isset( $_GET['_method'] ) ) {
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$this->method = strtoupper( $_GET['_method'] );
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}
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// determine type of request/response and load handler, JSON by default
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if ( $this->is_json_request() )
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$handler_class = 'WC_API_JSON_Handler';
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elseif ( $this->is_xml_request() )
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$handler_class = 'WC_API_XML_Handler';
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else
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$handler_class = apply_filters( 'woocommerce_api_default_response_handler', 'WC_API_JSON_Handler', $this->path, $this );
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$this->handler = new $handler_class();
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}
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/**
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* Check authentication for the request
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*
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* @since 2.1
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* @return WP_User|WP_Error WP_User object indicates successful login, WP_Error indicates unsuccessful login
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*/
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public function check_authentication() {
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// allow plugins to remove default authentication or add their own authentication
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$user = apply_filters( 'woocommerce_api_check_authentication', null, $this );
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// API requests run under the context of the authenticated user
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if ( is_a( $user, 'WP_User' ) )
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wp_set_current_user( $user->ID );
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// WP_Errors are handled in serve_request()
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elseif ( ! is_wp_error( $user ) )
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$user = new WP_Error( 'woocommerce_api_authentication_error', __( 'Invalid authentication method', 'woocommerce' ), array( 'code' => '500' ) );
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return $user;
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}
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/**
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* Convert an error to an array
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*
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* This iterates over all error codes and messages to change it into a flat
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* array. This enables simpler client behaviour, as it is represented as a
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* list in JSON rather than an object/map
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*
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* @since 2.1
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* @param WP_Error $error
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* @return array List of associative arrays with code and message keys
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*/
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protected function error_to_array( $error ) {
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$errors = array();
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foreach ( (array) $error->errors as $code => $messages ) {
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foreach ( (array) $messages as $message ) {
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$errors[] = array( 'code' => $code, 'message' => $message );
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}
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}
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return $errors;
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}
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/**
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* Handle serving an API request
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*
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* Matches the current server URI to a route and runs the first matching
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* callback then outputs a JSON representation of the returned value.
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*
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* @since 2.1
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* @uses WC_API_Server::dispatch()
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*/
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public function serve_request() {
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do_action( 'woocommerce_api_server_before_serve', $this );
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$this->header( 'Content-Type', $this->handler->get_content_type(), true );
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// TODO: can we prevent wc_cookie from being sent for API requests?
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// the API is enabled by default TODO: implement check for enabled setting here
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if ( ! apply_filters( 'woocommerce_api_enabled', true, $this ) ) {
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$this->send_status( 404 );
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echo $this->handler->generate_response( array( array( 'code' => 'woocommerce_api_disabled', 'message' => 'The WooCommerce API is disabled on this site' ) ) );
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return;
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}
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$result = $this->check_authentication();
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// if authorization check was successful, dispatch the request
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if ( ! is_wp_error( $result ) ) {
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$result = $this->dispatch();
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}
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// handle any dispatch errors
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if ( is_wp_error( $result ) ) {
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$data = $result->get_error_data();
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if ( is_array( $data ) && isset( $data['status'] ) ) {
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$this->send_status( $data['status'] );
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}
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$result = $this->error_to_array( $result );
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}
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// This is a filter rather than an action, since this is designed to be
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// re-entrant if needed
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$served = apply_filters( 'woocommerce_api_serve_request', false, $result, $this );
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if ( ! $served ) {
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if ( 'HEAD' === $this->method )
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return;
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echo $this->handler->generate_response( $result );
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}
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}
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/**
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* Retrieve the route map
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*
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* The route map is an associative array with path regexes as the keys. The
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* value is an indexed array with the callback function/method as the first
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* item, and a bitmask of HTTP methods as the second item (see the class
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* constants).
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*
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* Each route can be mapped to more than one callback by using an array of
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* the indexed arrays. This allows mapping e.g. GET requests to one callback
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* and POST requests to another.
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*
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* Note that the path regexes (array keys) must have @ escaped, as this is
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* used as the delimiter with preg_match()
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*
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* @since 2.1
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* @return array `'/path/regex' => array( $callback, $bitmask )` or `'/path/regex' => array( array( $callback, $bitmask ), ...)`
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*/
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public function get_routes() {
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// index added by default
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$endpoints = array(
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'/' => array( array( $this, 'get_index' ), self::READABLE ),
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);
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$endpoints = apply_filters( 'woocommerce_api_endpoints', $endpoints );
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// Normalise the endpoints
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foreach ( $endpoints as $route => &$handlers ) {
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if ( count( $handlers ) <= 2 && isset( $handlers[1] ) && ! is_array( $handlers[1] ) ) {
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$handlers = array( $handlers );
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}
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}
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return $endpoints;
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}
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/**
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* Match the request to a callback and call it
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*
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* @since 2.1
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* @return mixed The value returned by the callback, or a WP_Error instance
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*/
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public function dispatch() {
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switch ( $this->method ) {
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case 'HEAD':
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case 'GET':
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$method = self::METHOD_GET;
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break;
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case 'POST':
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$method = self::METHOD_POST;
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break;
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case 'PUT':
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$method = self::METHOD_PUT;
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break;
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case 'PATCH':
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$method = self::METHOD_PATCH;
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break;
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case 'DELETE':
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$method = self::METHOD_DELETE;
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break;
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default:
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return new WP_Error( 'woocommerce_api_unsupported_method', __( 'Unsupported request method' ), array( 'status' => 400 ) );
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}
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foreach ( $this->get_routes() as $route => $handlers ) {
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foreach ( $handlers as $handler ) {
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$callback = $handler[0];
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$supported = isset( $handler[1] ) ? $handler[1] : self::METHOD_GET;
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if ( !( $supported & $method ) )
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continue;
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$match = preg_match( '@^' . $route . '$@i', $this->path, $args );
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if ( !$match )
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continue;
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if ( ! is_callable( $callback ) )
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return new WP_Error( 'woocommerce_api_invalid_handler', __( 'The handler for the route is invalid' ), array( 'status' => 500 ) );
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$args = array_merge( $args, $this->params['GET'] );
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if ( $method & self::METHOD_POST ) {
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$args = array_merge( $args, $this->params['POST'] );
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}
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if ( $supported & self::ACCEPT_DATA ) {
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$data = $this->handler->parse_body( $this->get_raw_data() );
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$args = array_merge( $args, array( 'data' => $data ) );
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}
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elseif ( $supported & self::ACCEPT_RAW_DATA ) {
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$data = $this->get_raw_data();
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$args = array_merge( $args, array( 'data' => $data ) );
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}
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$args['_method'] = $method;
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$args['_route'] = $route;
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$args['_path'] = $this->path;
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$args['_headers'] = $this->headers;
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$args['_files'] = $this->files;
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$args = apply_filters( 'woocommerce_api_dispatch_args', $args, $callback );
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// Allow plugins to halt the request via this filter
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if ( is_wp_error( $args ) ) {
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return $args;
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}
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$params = $this->sort_callback_params( $callback, $args );
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if ( is_wp_error( $params ) )
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return $params;
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return call_user_func_array( $callback, $params );
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}
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}
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return new WP_Error( 'woocommerce_api_no_route', __( 'No route was found matching the URL and request method' ), array( 'status' => 404 ) );
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}
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/**
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* Sort parameters by order specified in method declaration
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*
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* Takes a callback and a list of available params, then filters and sorts
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* by the parameters the method actually needs, using the Reflection API
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*
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* @since 2.1
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* @param array $callback the endpoint callback
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* @param array $provided the provided request parameters
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* @return array
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*/
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protected function sort_callback_params( $callback, $provided ) {
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if ( is_array( $callback ) )
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$ref_func = new ReflectionMethod( $callback[0], $callback[1] );
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else
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$ref_func = new ReflectionFunction( $callback );
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$wanted = $ref_func->getParameters();
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$ordered_parameters = array();
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foreach ( $wanted as $param ) {
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if ( isset( $provided[ $param->getName() ] ) ) {
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// We have this parameters in the list to choose from
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$ordered_parameters[] = $provided[ $param->getName() ];
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}
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elseif ( $param->isDefaultValueAvailable() ) {
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// We don't have this parameter, but it's optional
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$ordered_parameters[] = $param->getDefaultValue();
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}
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else {
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// We don't have this parameter and it wasn't optional, abort!
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return new WP_Error( 'woocommerce_api_missing_callback_param', sprintf( __( 'Missing parameter %s' ), $param->getName() ), array( 'status' => 400 ) );
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}
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}
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return $ordered_parameters;
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}
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/**
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* Get the site index.
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*
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* This endpoint describes the capabilities of the site.
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*
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* @since 2.1
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* @return array Index entity
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*/
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public function get_index() {
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// General site data
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$available = array(
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'name' => get_option( 'blogname' ),
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'description' => get_option( 'blogdescription' ),
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'URL' => get_option( 'siteurl' ),
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'routes' => array(),
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'meta' => array(
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'currency' => get_woocommerce_currency(),
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'weight_unit' => get_option( 'woocommerce_weight_unit' ),
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'dimension_unit' => get_option( 'woocommerce_dimension_unit' ),
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'supports_ssl' => ( 'yes' === get_option( 'woocommerce_force_ssl_checkout' ) ),
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'links' => array(
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'help' => 'http://docs.woothemes.com/document/woocommerce-rest-api/',
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'profile' => 'https://raw.github.com/rmccue/WP-API/master/docs/schema.json', // TODO: update this
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),
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),
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);
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// Find the available routes
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foreach ( $this->get_routes() as $route => $callbacks ) {
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$data = array();
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$route = preg_replace( '#\(\?P(<\w+?>).*?\)#', '$1', $route );
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$methods = array();
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foreach ( self::$method_map as $name => $bitmask ) {
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foreach ( $callbacks as $callback ) {
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// Skip to the next route if any callback is hidden
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if ( $callback[1] & self::HIDDEN_ENDPOINT )
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continue 3;
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if ( $callback[1] & $bitmask )
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$data['supports'][] = $name;
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if ( $callback[1] & self::ACCEPT_DATA )
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$data['accepts_data'] = true;
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// For non-variable routes, generate links
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if ( strpos( $route, '<' ) === false ) {
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$data['meta'] = array(
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'self' => get_woocommerce_api_url( $route ),
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);
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}
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}
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}
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$available['routes'][$route] = apply_filters( 'woocommerce_api_endpoints_description', $data );
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}
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return apply_filters( 'woocommerce_api_index', $available );
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}
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/**
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* Send a HTTP status code
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*
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* @since 2.1
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* @param int $code HTTP status
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*/
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public function send_status( $code ) {
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status_header( $code );
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}
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/**
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* Send a HTTP header
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*
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* @since 2.1
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* @param string $key Header key
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* @param string $value Header value
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* @param boolean $replace Should we replace the existing header?
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*/
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public function header( $key, $value, $replace = true ) {
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header( sprintf( '%s: %s', $key, $value ), $replace );
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}
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/**
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* Send a Link header
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*
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* @internal The $rel parameter is first, as this looks nicer when sending multiple
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*
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* @link http://tools.ietf.org/html/rfc5988
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* @link http://www.iana.org/assignments/link-relations/link-relations.xml
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*
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* @since 2.1
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* @param string $rel Link relation. Either a registered type, or an absolute URL
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* @param string $link Target IRI for the link
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* @param array $other Other parameters to send, as an assocative array
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*/
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public function link_header( $rel, $link, $other = array() ) {
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$header = 'Link: <' . $link . '>; rel="' . $rel . '"';
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foreach ( $other as $key => $value ) {
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if ( 'title' == $key )
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$value = '"' . $value . '"';
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$header .= '; ' . $key . '=' . $value;
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}
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$this->header( 'Link', $header, false );
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}
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/**
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* Send navigation-related headers for post collections
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*
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* @since 2.1
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* @param WP_Query $query
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*/
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public function query_navigation_headers( $query ) {
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$max_page = $query->max_num_pages;
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$paged = $query->get('paged');
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if ( !$paged )
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$paged = 1;
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$nextpage = intval($paged) + 1;
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if ( ! $query->is_single() ) {
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if ( $paged > 1 ) {
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$request = remove_query_arg( 'page' );
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$request = add_query_arg( 'page', $paged - 1, $request );
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$this->link_header( 'prev', $request );
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}
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if ( $nextpage <= $max_page ) {
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$request = remove_query_arg( 'page' );
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$request = add_query_arg( 'page', $nextpage, $request );
|
|
$this->link_header( 'next', $request );
|
|
}
|
|
}
|
|
|
|
$this->header( 'X-WP-Total', $query->found_posts );
|
|
$this->header( 'X-WP-TotalPages', $max_page );
|
|
|
|
do_action('woocommerce_api_query_navigation_headers', $this, $query);
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieve the raw request entity (body)
|
|
*
|
|
* @since 2.1
|
|
* @return string
|
|
*/
|
|
public function get_raw_data() {
|
|
global $HTTP_RAW_POST_DATA;
|
|
|
|
// A bug in PHP < 5.2.2 makes $HTTP_RAW_POST_DATA not set by default,
|
|
// but we can do it ourself.
|
|
if ( !isset( $HTTP_RAW_POST_DATA ) ) {
|
|
$HTTP_RAW_POST_DATA = file_get_contents( 'php://input' );
|
|
}
|
|
|
|
return $HTTP_RAW_POST_DATA;
|
|
}
|
|
|
|
/**
|
|
* Parse an RFC3339 timestamp into a DateTime
|
|
*
|
|
* @param string $date RFC3339 timestamp
|
|
* @param boolean $force_utc Force UTC timezone instead of using the timestamp's TZ?
|
|
* @return DateTime
|
|
*/
|
|
public function parse_date( $date, $force_utc = false ) {
|
|
// Default timezone to the server's current one
|
|
$timezone = self::get_timezone();
|
|
if ( $force_utc ) {
|
|
$date = preg_replace( '/[+-]\d+:?\d+$/', '+00:00', $date );
|
|
$timezone = new DateTimeZone( 'UTC' );
|
|
}
|
|
|
|
// Strip millisecond precision (a full stop followed by one or more digits)
|
|
if ( strpos( $date, '.' ) !== false ) {
|
|
$date = preg_replace( '/\.\d+/', '', $date );
|
|
}
|
|
$datetime = DateTime::createFromFormat( DateTime::RFC3339, $date );
|
|
|
|
return $datetime;
|
|
}
|
|
|
|
/**
|
|
* Get a local date with its GMT equivalent, in MySQL datetime format
|
|
*
|
|
* @param string $date RFC3339 timestamp
|
|
* @param boolean $force_utc Should we force UTC timestamp?
|
|
* @return array Local and UTC datetime strings, in MySQL datetime format (Y-m-d H:i:s)
|
|
*/
|
|
public function get_date_with_gmt( $date, $force_utc = false ) {
|
|
$datetime = $this->parse_date( $date, $force_utc );
|
|
|
|
$datetime->setTimezone( self::get_timezone() );
|
|
$local = $datetime->format( 'Y-m-d H:i:s' );
|
|
|
|
$datetime->setTimezone( new DateTimeZone( 'UTC' ) );
|
|
$utc = $datetime->format('Y-m-d H:i:s');
|
|
|
|
return array( $local, $utc );
|
|
}
|
|
|
|
/**
|
|
* Get the timezone object for the site
|
|
*
|
|
* @return DateTimeZone
|
|
*/
|
|
public function get_timezone() {
|
|
static $zone = null;
|
|
if ($zone !== null)
|
|
return $zone;
|
|
|
|
$tzstring = get_option( 'timezone_string' );
|
|
if ( ! $tzstring ) {
|
|
// Create a UTC+- zone if no timezone string exists
|
|
$current_offset = get_option( 'gmt_offset' );
|
|
if ( 0 == $current_offset )
|
|
$tzstring = 'UTC';
|
|
elseif ($current_offset < 0)
|
|
$tzstring = 'Etc/GMT' . $current_offset;
|
|
else
|
|
$tzstring = 'Etc/GMT+' . $current_offset;
|
|
}
|
|
$zone = new DateTimeZone( $tzstring );
|
|
return $zone;
|
|
}
|
|
|
|
/**
|
|
* Extract headers from a PHP-style $_SERVER array
|
|
*
|
|
* @since 2.1
|
|
* @param array $server Associative array similar to $_SERVER
|
|
* @return array Headers extracted from the input
|
|
*/
|
|
public function get_headers($server) {
|
|
$headers = array();
|
|
// CONTENT_* headers are not prefixed with HTTP_
|
|
$additional = array('CONTENT_LENGTH' => true, 'CONTENT_MD5' => true, 'CONTENT_TYPE' => true);
|
|
|
|
foreach ($server as $key => $value) {
|
|
if ( strpos( $key, 'HTTP_' ) === 0) {
|
|
$headers[ substr( $key, 5 ) ] = $value;
|
|
}
|
|
elseif ( isset( $additional[ $key ] ) ) {
|
|
$headers[ $key ] = $value;
|
|
}
|
|
}
|
|
|
|
return $headers;
|
|
}
|
|
|
|
/**
|
|
* Check if the current request accepts a JSON response by checking the endpoint suffix (.json) or
|
|
* the HTTP ACCEPT header
|
|
*
|
|
* @since 2.1
|
|
* @return bool
|
|
*/
|
|
private function is_json_request() {
|
|
|
|
// check path
|
|
if ( false !== stripos( $this->path, '.json' ) )
|
|
return true;
|
|
|
|
// check ACCEPT header, only 'application/json' is acceptable, see RFC 4627
|
|
if ( isset( $this->headers['ACCEPT'] ) && 'application/json' == $this->headers['ACCEPT'] )
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check if the current request accepts an XML response by checking the endpoint suffix (.xml) or
|
|
* the HTTP ACCEPT header
|
|
*
|
|
* @since 2.1
|
|
* @return bool
|
|
*/
|
|
private function is_xml_request() {
|
|
|
|
// check path
|
|
if ( false !== stripos( $this->path, '.xml' ) )
|
|
return true;
|
|
|
|
// check headers, 'application/xml' or 'text/xml' are acceptable, see RFC 2376
|
|
if ( isset( $this->headers['ACCEPT'] ) && ( 'application/xml' == $this->headers['ACCEPT'] || 'text/xml' == $this->headers['ACCEPT'] ) )
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
}
|