1334 lines
38 KiB
PHP
1334 lines
38 KiB
PHP
<?php
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/**
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* REST API: WP_REST_Server class
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*
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* @package WordPress
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* @subpackage REST_API
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* @since 4.4.0
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*/
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/**
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* Core class used to implement the WordPress REST API server.
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*
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* @since 4.4.0
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*/
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class WP_REST_Server {
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/**
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* Alias for GET transport method.
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*
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* @since 4.4.0
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* @var string
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*/
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const READABLE = 'GET';
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/**
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* Alias for POST transport method.
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*
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* @since 4.4.0
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* @var string
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*/
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const CREATABLE = 'POST';
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/**
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* Alias for POST, PUT, PATCH transport methods together.
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*
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* @since 4.4.0
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* @var string
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*/
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const EDITABLE = 'POST, PUT, PATCH';
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/**
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* Alias for DELETE transport method.
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*
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* @since 4.4.0
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* @var string
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*/
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const DELETABLE = 'DELETE';
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/**
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* Alias for GET, POST, PUT, PATCH & DELETE transport methods together.
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*
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* @since 4.4.0
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* @var string
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*/
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const ALLMETHODS = 'GET, POST, PUT, PATCH, DELETE';
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/**
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* Namespaces registered to the server.
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*
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* @since 4.4.0
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* @var array
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*/
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protected $namespaces = array();
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/**
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* Endpoints registered to the server.
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*
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* @since 4.4.0
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* @var array
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*/
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protected $endpoints = array();
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/**
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* Options defined for the routes.
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*
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* @since 4.4.0
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* @var array
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*/
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protected $route_options = array();
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/**
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* Instantiates the REST server.
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*
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* @since 4.4.0
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*/
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public function __construct() {
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$this->endpoints = array(
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// Meta endpoints.
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'/' => array(
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'callback' => array( $this, 'get_index' ),
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'methods' => 'GET',
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'args' => array(
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'context' => array(
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'default' => 'view',
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),
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),
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),
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);
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}
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/**
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* Checks the authentication headers if supplied.
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*
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* @since 4.4.0
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*
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* @return WP_Error|null WP_Error indicates unsuccessful login, null indicates successful
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* or no authentication provided
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*/
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public function check_authentication() {
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/**
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* Filters REST authentication errors.
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*
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* This is used to pass a WP_Error from an authentication method back to
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* the API.
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*
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* Authentication methods should check first if they're being used, as
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* multiple authentication methods can be enabled on a site (cookies,
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* HTTP basic auth, OAuth). If the authentication method hooked in is
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* not actually being attempted, null should be returned to indicate
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* another authentication method should check instead. Similarly,
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* callbacks should ensure the value is `null` before checking for
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* errors.
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*
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* A WP_Error instance can be returned if an error occurs, and this should
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* match the format used by API methods internally (that is, the `status`
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* data should be used). A callback can return `true` to indicate that
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* the authentication method was used, and it succeeded.
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*
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* @since 4.4.0
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*
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* @param WP_Error|null|bool WP_Error if authentication error, null if authentication
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* method wasn't used, true if authentication succeeded.
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*/
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return apply_filters( 'rest_authentication_errors', null );
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}
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/**
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* Converts an error to a response object.
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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 4.4.0
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*
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* @param WP_Error $error WP_Error instance.
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* @return WP_REST_Response List of associative arrays with code and message keys.
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*/
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protected function error_to_response( $error ) {
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$error_data = $error->get_error_data();
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if ( is_array( $error_data ) && isset( $error_data['status'] ) ) {
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$status = $error_data['status'];
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} else {
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$status = 500;
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}
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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, 'data' => $error->get_error_data( $code ) );
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}
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}
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$data = $errors[0];
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if ( count( $errors ) > 1 ) {
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// Remove the primary error.
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array_shift( $errors );
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$data['additional_errors'] = $errors;
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}
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$response = new WP_REST_Response( $data, $status );
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return $response;
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}
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/**
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* Retrieves an appropriate error representation in JSON.
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*
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* Note: This should only be used in WP_REST_Server::serve_request(), as it
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* cannot handle WP_Error internally. All callbacks and other internal methods
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* should instead return a WP_Error with the data set to an array that includes
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* a 'status' key, with the value being the HTTP status to send.
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*
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* @since 4.4.0
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*
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* @param string $code WP_Error-style code.
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* @param string $message Human-readable message.
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* @param int $status Optional. HTTP status code to send. Default null.
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* @return string JSON representation of the error
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*/
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protected function json_error( $code, $message, $status = null ) {
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if ( $status ) {
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$this->set_status( $status );
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}
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$error = compact( 'code', 'message' );
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return wp_json_encode( $error );
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}
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/**
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* Handles 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 4.4.0
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*
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* @see WP_REST_Server::dispatch()
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*
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* @param string $path Optional. The request route. If not set, `$_SERVER['PATH_INFO']` will be used.
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* Default null.
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* @return false|null Null if not served and a HEAD request, false otherwise.
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*/
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public function serve_request( $path = null ) {
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$content_type = isset( $_GET['_jsonp'] ) ? 'application/javascript' : 'application/json';
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$this->send_header( 'Content-Type', $content_type . '; charset=' . get_option( 'blog_charset' ) );
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$this->send_header( 'X-Robots-Tag', 'noindex' );
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$api_root = get_rest_url();
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if ( ! empty( $api_root ) ) {
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$this->send_header( 'Link', '<' . esc_url_raw( $api_root ) . '>; rel="https://api.w.org/"' );
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}
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/*
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* Mitigate possible JSONP Flash attacks.
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*
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* https://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/
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*/
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$this->send_header( 'X-Content-Type-Options', 'nosniff' );
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$this->send_header( 'Access-Control-Expose-Headers', 'X-WP-Total, X-WP-TotalPages' );
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$this->send_header( 'Access-Control-Allow-Headers', 'Authorization, Content-Type' );
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/**
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* Send nocache headers on authenticated requests.
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*
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* @since 4.4.0
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*
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* @param bool $rest_send_nocache_headers Whether to send no-cache headers.
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*/
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$send_no_cache_headers = apply_filters( 'rest_send_nocache_headers', is_user_logged_in() );
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if ( $send_no_cache_headers ) {
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foreach ( wp_get_nocache_headers() as $header => $header_value ) {
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if ( empty( $header_value ) ) {
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$this->remove_header( $header );
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} else {
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$this->send_header( $header, $header_value );
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}
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}
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}
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/**
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* Filters whether the REST API is enabled.
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*
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* @since 4.4.0
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* @deprecated 4.7.0 Use the rest_authentication_errors filter to restrict access to the API
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*
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* @param bool $rest_enabled Whether the REST API is enabled. Default true.
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*/
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apply_filters_deprecated( 'rest_enabled', array( true ), '4.7.0', 'rest_authentication_errors',
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__( 'The REST API can no longer be completely disabled, the rest_authentication_errors filter can be used to restrict access to the API, instead.' )
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);
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/**
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* Filters whether jsonp is enabled.
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*
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* @since 4.4.0
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*
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* @param bool $jsonp_enabled Whether jsonp is enabled. Default true.
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*/
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$jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true );
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$jsonp_callback = null;
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if ( isset( $_GET['_jsonp'] ) ) {
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if ( ! $jsonp_enabled ) {
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echo $this->json_error( 'rest_callback_disabled', __( 'JSONP support is disabled on this site.' ), 400 );
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return false;
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}
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$jsonp_callback = $_GET['_jsonp'];
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if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) {
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echo $this->json_error( 'rest_callback_invalid', __( 'Invalid JSONP callback function.' ), 400 );
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return false;
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}
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}
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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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}
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$request = new WP_REST_Request( $_SERVER['REQUEST_METHOD'], $path );
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$request->set_query_params( wp_unslash( $_GET ) );
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$request->set_body_params( wp_unslash( $_POST ) );
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$request->set_file_params( $_FILES );
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$request->set_headers( $this->get_headers( wp_unslash( $_SERVER ) ) );
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$request->set_body( $this->get_raw_data() );
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/*
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* HTTP method override for clients that can't use PUT/PATCH/DELETE. First, we check
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* $_GET['_method']. If that is not set, we check for the HTTP_X_HTTP_METHOD_OVERRIDE
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* header.
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*/
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if ( isset( $_GET['_method'] ) ) {
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$request->set_method( $_GET['_method'] );
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} elseif ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) {
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$request->set_method( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] );
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}
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$result = $this->check_authentication();
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if ( ! is_wp_error( $result ) ) {
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$result = $this->dispatch( $request );
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}
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// Normalize to either WP_Error or WP_REST_Response...
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$result = rest_ensure_response( $result );
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// ...then convert WP_Error across.
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if ( is_wp_error( $result ) ) {
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$result = $this->error_to_response( $result );
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}
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/**
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* Filters the API response.
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*
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* Allows modification of the response before returning.
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*
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* @since 4.4.0
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* @since 4.5.0 Applied to embedded responses.
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*
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* @param WP_HTTP_Response $result Result to send to the client. Usually a WP_REST_Response.
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* @param WP_REST_Server $this Server instance.
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* @param WP_REST_Request $request Request used to generate the response.
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*/
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$result = apply_filters( 'rest_post_dispatch', rest_ensure_response( $result ), $this, $request );
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// Wrap the response in an envelope if asked for.
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if ( isset( $_GET['_envelope'] ) ) {
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$result = $this->envelope_response( $result, isset( $_GET['_embed'] ) );
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}
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// Send extra data from response objects.
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$headers = $result->get_headers();
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$this->send_headers( $headers );
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$code = $result->get_status();
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$this->set_status( $code );
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/**
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* Filters whether the request has already been served.
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*
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* Allow sending the request manually - by returning true, the API result
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* will not be sent to the client.
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*
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* @since 4.4.0
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*
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* @param bool $served Whether the request has already been served.
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* Default false.
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* @param WP_HTTP_Response $result Result to send to the client. Usually a WP_REST_Response.
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* @param WP_REST_Request $request Request used to generate the response.
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* @param WP_REST_Server $this Server instance.
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*/
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$served = apply_filters( 'rest_pre_serve_request', false, $result, $request, $this );
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if ( ! $served ) {
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if ( 'HEAD' === $request->get_method() ) {
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return null;
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}
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// Embed links inside the request.
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$result = $this->response_to_data( $result, isset( $_GET['_embed'] ) );
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/**
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* Filters the API response.
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*
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* Allows modification of the response data after inserting
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* embedded data (if any) and before echoing the response data.
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*
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* @since 4.8.1
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*
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* @param array $result Response data to send to the client.
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* @param WP_REST_Server $this Server instance.
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* @param WP_REST_Request $request Request used to generate the response.
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*/
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$result = apply_filters( 'rest_pre_echo_response', $result, $this, $request );
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$result = wp_json_encode( $result );
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$json_error_message = $this->get_json_last_error();
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if ( $json_error_message ) {
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$json_error_obj = new WP_Error( 'rest_encode_error', $json_error_message, array( 'status' => 500 ) );
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$result = $this->error_to_response( $json_error_obj );
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$result = wp_json_encode( $result->data[0] );
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}
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if ( $jsonp_callback ) {
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// Prepend '/**/' to mitigate possible JSONP Flash attacks.
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// https://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/
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echo '/**/' . $jsonp_callback . '(' . $result . ')';
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} else {
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echo $result;
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}
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}
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return null;
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}
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/**
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* Converts a response to data to send.
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*
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* @since 4.4.0
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*
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* @param WP_REST_Response $response Response object.
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* @param bool $embed Whether links should be embedded.
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* @return array {
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* Data with sub-requests embedded.
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*
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* @type array [$_links] Links.
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* @type array [$_embedded] Embeddeds.
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* }
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*/
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public function response_to_data( $response, $embed ) {
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$data = $response->get_data();
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$links = $this->get_compact_response_links( $response );
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if ( ! empty( $links ) ) {
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// Convert links to part of the data.
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$data['_links'] = $links;
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}
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if ( $embed ) {
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// Determine if this is a numeric array.
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if ( wp_is_numeric_array( $data ) ) {
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$data = array_map( array( $this, 'embed_links' ), $data );
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} else {
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$data = $this->embed_links( $data );
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}
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}
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return $data;
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}
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/**
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* Retrieves links from a response.
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*
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* Extracts the links from a response into a structured hash, suitable for
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* direct output.
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*
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* @since 4.4.0
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* @static
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*
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* @param WP_REST_Response $response Response to extract links from.
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* @return array Map of link relation to list of link hashes.
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*/
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public static function get_response_links( $response ) {
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$links = $response->get_links();
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if ( empty( $links ) ) {
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return array();
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}
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// Convert links to part of the data.
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$data = array();
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foreach ( $links as $rel => $items ) {
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$data[ $rel ] = array();
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foreach ( $items as $item ) {
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$attributes = $item['attributes'];
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$attributes['href'] = $item['href'];
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$data[ $rel ][] = $attributes;
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}
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}
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return $data;
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}
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/**
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* Retrieves the CURIEs (compact URIs) used for relations.
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*
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* Extracts the links from a response into a structured hash, suitable for
|
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* direct output.
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*
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* @since 4.5.0
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* @static
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*
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* @param WP_REST_Response $response Response to extract links from.
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* @return array Map of link relation to list of link hashes.
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*/
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public static function get_compact_response_links( $response ) {
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$links = self::get_response_links( $response );
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if ( empty( $links ) ) {
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return array();
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}
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$curies = $response->get_curies();
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$used_curies = array();
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foreach ( $links as $rel => $items ) {
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// Convert $rel URIs to their compact versions if they exist.
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foreach ( $curies as $curie ) {
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$href_prefix = substr( $curie['href'], 0, strpos( $curie['href'], '{rel}' ) );
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if ( strpos( $rel, $href_prefix ) !== 0 ) {
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continue;
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}
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// Relation now changes from '$uri' to '$curie:$relation'.
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$rel_regex = str_replace( '\{rel\}', '(.+)', preg_quote( $curie['href'], '!' ) );
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preg_match( '!' . $rel_regex . '!', $rel, $matches );
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if ( $matches ) {
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$new_rel = $curie['name'] . ':' . $matches[1];
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$used_curies[ $curie['name'] ] = $curie;
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$links[ $new_rel ] = $items;
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unset( $links[ $rel ] );
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break;
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}
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}
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}
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// Push the curies onto the start of the links array.
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if ( $used_curies ) {
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$links['curies'] = array_values( $used_curies );
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|
}
|
|
|
|
return $links;
|
|
}
|
|
|
|
/**
|
|
* Embeds the links from the data into the request.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param array $data Data from the request.
|
|
* @return array {
|
|
* Data with sub-requests embedded.
|
|
*
|
|
* @type array [$_links] Links.
|
|
* @type array [$_embedded] Embeddeds.
|
|
* }
|
|
*/
|
|
protected function embed_links( $data ) {
|
|
if ( empty( $data['_links'] ) ) {
|
|
return $data;
|
|
}
|
|
|
|
$embedded = array();
|
|
|
|
foreach ( $data['_links'] as $rel => $links ) {
|
|
// Ignore links to self, for obvious reasons.
|
|
if ( 'self' === $rel ) {
|
|
continue;
|
|
}
|
|
|
|
$embeds = array();
|
|
|
|
foreach ( $links as $item ) {
|
|
// Determine if the link is embeddable.
|
|
if ( empty( $item['embeddable'] ) ) {
|
|
// Ensure we keep the same order.
|
|
$embeds[] = array();
|
|
continue;
|
|
}
|
|
|
|
// Run through our internal routing and serve.
|
|
$request = WP_REST_Request::from_url( $item['href'] );
|
|
if ( ! $request ) {
|
|
$embeds[] = array();
|
|
continue;
|
|
}
|
|
|
|
// Embedded resources get passed context=embed.
|
|
if ( empty( $request['context'] ) ) {
|
|
$request['context'] = 'embed';
|
|
}
|
|
|
|
$response = $this->dispatch( $request );
|
|
|
|
/** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
|
|
$response = apply_filters( 'rest_post_dispatch', rest_ensure_response( $response ), $this, $request );
|
|
|
|
$embeds[] = $this->response_to_data( $response, false );
|
|
}
|
|
|
|
// Determine if any real links were found.
|
|
$has_links = count( array_filter( $embeds ) );
|
|
|
|
if ( $has_links ) {
|
|
$embedded[ $rel ] = $embeds;
|
|
}
|
|
}
|
|
|
|
if ( ! empty( $embedded ) ) {
|
|
$data['_embedded'] = $embedded;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Wraps the response in an envelope.
|
|
*
|
|
* The enveloping technique is used to work around browser/client
|
|
* compatibility issues. Essentially, it converts the full HTTP response to
|
|
* data instead.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param WP_REST_Response $response Response object.
|
|
* @param bool $embed Whether links should be embedded.
|
|
* @return WP_REST_Response New response with wrapped data
|
|
*/
|
|
public function envelope_response( $response, $embed ) {
|
|
$envelope = array(
|
|
'body' => $this->response_to_data( $response, $embed ),
|
|
'status' => $response->get_status(),
|
|
'headers' => $response->get_headers(),
|
|
);
|
|
|
|
/**
|
|
* Filters the enveloped form of a response.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param array $envelope Envelope data.
|
|
* @param WP_REST_Response $response Original response data.
|
|
*/
|
|
$envelope = apply_filters( 'rest_envelope_response', $envelope, $response );
|
|
|
|
// Ensure it's still a response and return.
|
|
return rest_ensure_response( $envelope );
|
|
}
|
|
|
|
/**
|
|
* Registers a route to the server.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param string $namespace Namespace.
|
|
* @param string $route The REST route.
|
|
* @param array $route_args Route arguments.
|
|
* @param bool $override Optional. Whether the route should be overridden if it already exists.
|
|
* Default false.
|
|
*/
|
|
public function register_route( $namespace, $route, $route_args, $override = false ) {
|
|
if ( ! isset( $this->namespaces[ $namespace ] ) ) {
|
|
$this->namespaces[ $namespace ] = array();
|
|
|
|
$this->register_route( $namespace, '/' . $namespace, array(
|
|
array(
|
|
'methods' => self::READABLE,
|
|
'callback' => array( $this, 'get_namespace_index' ),
|
|
'args' => array(
|
|
'namespace' => array(
|
|
'default' => $namespace,
|
|
),
|
|
'context' => array(
|
|
'default' => 'view',
|
|
),
|
|
),
|
|
),
|
|
) );
|
|
}
|
|
|
|
// Associative to avoid double-registration.
|
|
$this->namespaces[ $namespace ][ $route ] = true;
|
|
$route_args['namespace'] = $namespace;
|
|
|
|
if ( $override || empty( $this->endpoints[ $route ] ) ) {
|
|
$this->endpoints[ $route ] = $route_args;
|
|
} else {
|
|
$this->endpoints[ $route ] = array_merge( $this->endpoints[ $route ], $route_args );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieves the route map.
|
|
*
|
|
* The route map is an associative array with path regexes as the keys. The
|
|
* value is an indexed array with the callback function/method as the first
|
|
* item, and a bitmask of HTTP methods as the second item (see the class
|
|
* constants).
|
|
*
|
|
* Each route can be mapped to more than one callback by using an array of
|
|
* the indexed arrays. This allows mapping e.g. GET requests to one callback
|
|
* and POST requests to another.
|
|
*
|
|
* Note that the path regexes (array keys) must have @ escaped, as this is
|
|
* used as the delimiter with preg_match()
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @return array `'/path/regex' => array( $callback, $bitmask )` or
|
|
* `'/path/regex' => array( array( $callback, $bitmask ), ...)`.
|
|
*/
|
|
public function get_routes() {
|
|
|
|
/**
|
|
* Filters the array of available endpoints.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param array $endpoints The available endpoints. An array of matching regex patterns, each mapped
|
|
* to an array of callbacks for the endpoint. These take the format
|
|
* `'/path/regex' => array( $callback, $bitmask )` or
|
|
* `'/path/regex' => array( array( $callback, $bitmask ).
|
|
*/
|
|
$endpoints = apply_filters( 'rest_endpoints', $this->endpoints );
|
|
|
|
// Normalise the endpoints.
|
|
$defaults = array(
|
|
'methods' => '',
|
|
'accept_json' => false,
|
|
'accept_raw' => false,
|
|
'show_in_index' => true,
|
|
'args' => array(),
|
|
);
|
|
|
|
foreach ( $endpoints as $route => &$handlers ) {
|
|
|
|
if ( isset( $handlers['callback'] ) ) {
|
|
// Single endpoint, add one deeper.
|
|
$handlers = array( $handlers );
|
|
}
|
|
|
|
if ( ! isset( $this->route_options[ $route ] ) ) {
|
|
$this->route_options[ $route ] = array();
|
|
}
|
|
|
|
foreach ( $handlers as $key => &$handler ) {
|
|
|
|
if ( ! is_numeric( $key ) ) {
|
|
// Route option, move it to the options.
|
|
$this->route_options[ $route ][ $key ] = $handler;
|
|
unset( $handlers[ $key ] );
|
|
continue;
|
|
}
|
|
|
|
$handler = wp_parse_args( $handler, $defaults );
|
|
|
|
// Allow comma-separated HTTP methods.
|
|
if ( is_string( $handler['methods'] ) ) {
|
|
$methods = explode( ',', $handler['methods'] );
|
|
} elseif ( is_array( $handler['methods'] ) ) {
|
|
$methods = $handler['methods'];
|
|
} else {
|
|
$methods = array();
|
|
}
|
|
|
|
$handler['methods'] = array();
|
|
|
|
foreach ( $methods as $method ) {
|
|
$method = strtoupper( trim( $method ) );
|
|
$handler['methods'][ $method ] = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $endpoints;
|
|
}
|
|
|
|
/**
|
|
* Retrieves namespaces registered on the server.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @return array List of registered namespaces.
|
|
*/
|
|
public function get_namespaces() {
|
|
return array_keys( $this->namespaces );
|
|
}
|
|
|
|
/**
|
|
* Retrieves specified options for a route.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param string $route Route pattern to fetch options for.
|
|
* @return array|null Data as an associative array if found, or null if not found.
|
|
*/
|
|
public function get_route_options( $route ) {
|
|
if ( ! isset( $this->route_options[ $route ] ) ) {
|
|
return null;
|
|
}
|
|
|
|
return $this->route_options[ $route ];
|
|
}
|
|
|
|
/**
|
|
* Matches the request to a callback and call it.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param WP_REST_Request $request Request to attempt dispatching.
|
|
* @return WP_REST_Response Response returned by the callback.
|
|
*/
|
|
public function dispatch( $request ) {
|
|
/**
|
|
* Filters the pre-calculated result of a REST dispatch request.
|
|
*
|
|
* Allow hijacking the request before dispatching by returning a non-empty. The returned value
|
|
* will be used to serve the request instead.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param mixed $result Response to replace the requested version with. Can be anything
|
|
* a normal endpoint can return, or null to not hijack the request.
|
|
* @param WP_REST_Server $this Server instance.
|
|
* @param WP_REST_Request $request Request used to generate the response.
|
|
*/
|
|
$result = apply_filters( 'rest_pre_dispatch', null, $this, $request );
|
|
|
|
if ( ! empty( $result ) ) {
|
|
return $result;
|
|
}
|
|
|
|
$method = $request->get_method();
|
|
$path = $request->get_route();
|
|
|
|
foreach ( $this->get_routes() as $route => $handlers ) {
|
|
$match = preg_match( '@^' . $route . '$@i', $path, $matches );
|
|
|
|
if ( ! $match ) {
|
|
continue;
|
|
}
|
|
|
|
$args = array();
|
|
foreach ( $matches as $param => $value ) {
|
|
if ( ! is_int( $param ) ) {
|
|
$args[ $param ] = $value;
|
|
}
|
|
}
|
|
|
|
foreach ( $handlers as $handler ) {
|
|
$callback = $handler['callback'];
|
|
$response = null;
|
|
|
|
// Fallback to GET method if no HEAD method is registered.
|
|
$checked_method = $method;
|
|
if ( 'HEAD' === $method && empty( $handler['methods']['HEAD'] ) ) {
|
|
$checked_method = 'GET';
|
|
}
|
|
if ( empty( $handler['methods'][ $checked_method ] ) ) {
|
|
continue;
|
|
}
|
|
|
|
if ( ! is_callable( $callback ) ) {
|
|
$response = new WP_Error( 'rest_invalid_handler', __( 'The handler for the route is invalid' ), array( 'status' => 500 ) );
|
|
}
|
|
|
|
if ( ! is_wp_error( $response ) ) {
|
|
// Remove the redundant preg_match argument.
|
|
unset( $args[0] );
|
|
|
|
$request->set_url_params( $args );
|
|
$request->set_attributes( $handler );
|
|
|
|
$defaults = array();
|
|
|
|
foreach ( $handler['args'] as $arg => $options ) {
|
|
if ( isset( $options['default'] ) ) {
|
|
$defaults[ $arg ] = $options['default'];
|
|
}
|
|
}
|
|
|
|
$request->set_default_params( $defaults );
|
|
|
|
$check_required = $request->has_valid_params();
|
|
if ( is_wp_error( $check_required ) ) {
|
|
$response = $check_required;
|
|
} else {
|
|
$check_sanitized = $request->sanitize_params();
|
|
if ( is_wp_error( $check_sanitized ) ) {
|
|
$response = $check_sanitized;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Filters the response before executing any REST API callbacks.
|
|
*
|
|
* Allows plugins to perform additional validation after a
|
|
* request is initialized and matched to a registered route,
|
|
* but before it is executed.
|
|
*
|
|
* Note that this filter will not be called for requests that
|
|
* fail to authenticate or match to a registered route.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param WP_HTTP_Response $response Result to send to the client. Usually a WP_REST_Response.
|
|
* @param WP_REST_Server $handler ResponseHandler instance (usually WP_REST_Server).
|
|
* @param WP_REST_Request $request Request used to generate the response.
|
|
*/
|
|
$response = apply_filters( 'rest_request_before_callbacks', $response, $handler, $request );
|
|
|
|
if ( ! is_wp_error( $response ) ) {
|
|
// Check permission specified on the route.
|
|
if ( ! empty( $handler['permission_callback'] ) ) {
|
|
$permission = call_user_func( $handler['permission_callback'], $request );
|
|
|
|
if ( is_wp_error( $permission ) ) {
|
|
$response = $permission;
|
|
} elseif ( false === $permission || null === $permission ) {
|
|
$response = new WP_Error( 'rest_forbidden', __( 'Sorry, you are not allowed to do that.' ), array( 'status' => rest_authorization_required_code() ) );
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( ! is_wp_error( $response ) ) {
|
|
/**
|
|
* Filters the REST dispatch request result.
|
|
*
|
|
* Allow plugins to override dispatching the request.
|
|
*
|
|
* @since 4.4.0
|
|
* @since 4.5.0 Added `$route` and `$handler` parameters.
|
|
*
|
|
* @param bool $dispatch_result Dispatch result, will be used if not empty.
|
|
* @param WP_REST_Request $request Request used to generate the response.
|
|
* @param string $route Route matched for the request.
|
|
* @param array $handler Route handler used for the request.
|
|
*/
|
|
$dispatch_result = apply_filters( 'rest_dispatch_request', null, $request, $route, $handler );
|
|
|
|
// Allow plugins to halt the request via this filter.
|
|
if ( null !== $dispatch_result ) {
|
|
$response = $dispatch_result;
|
|
} else {
|
|
$response = call_user_func( $callback, $request );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Filters the response immediately after executing any REST API
|
|
* callbacks.
|
|
*
|
|
* Allows plugins to perform any needed cleanup, for example,
|
|
* to undo changes made during the {@see 'rest_request_before_callbacks'}
|
|
* filter.
|
|
*
|
|
* Note that this filter will not be called for requests that
|
|
* fail to authenticate or match to a registered route.
|
|
*
|
|
* Note that an endpoint's `permission_callback` can still be
|
|
* called after this filter - see `rest_send_allow_header()`.
|
|
*
|
|
* @since 4.7.0
|
|
*
|
|
* @param WP_HTTP_Response $response Result to send to the client. Usually a WP_REST_Response.
|
|
* @param WP_REST_Server $handler ResponseHandler instance (usually WP_REST_Server).
|
|
* @param WP_REST_Request $request Request used to generate the response.
|
|
*/
|
|
$response = apply_filters( 'rest_request_after_callbacks', $response, $handler, $request );
|
|
|
|
if ( is_wp_error( $response ) ) {
|
|
$response = $this->error_to_response( $response );
|
|
} else {
|
|
$response = rest_ensure_response( $response );
|
|
}
|
|
|
|
$response->set_matched_route( $route );
|
|
$response->set_matched_handler( $handler );
|
|
|
|
return $response;
|
|
}
|
|
}
|
|
|
|
return $this->error_to_response( new WP_Error( 'rest_no_route', __( 'No route was found matching the URL and request method' ), array( 'status' => 404 ) ) );
|
|
}
|
|
|
|
/**
|
|
* Returns if an error occurred during most recent JSON encode/decode.
|
|
*
|
|
* Strings to be translated will be in format like
|
|
* "Encoding error: Maximum stack depth exceeded".
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @return bool|string Boolean false or string error message.
|
|
*/
|
|
protected function get_json_last_error() {
|
|
// See https://core.trac.wordpress.org/ticket/27799.
|
|
if ( ! function_exists( 'json_last_error' ) ) {
|
|
return false;
|
|
}
|
|
|
|
$last_error_code = json_last_error();
|
|
|
|
if ( ( defined( 'JSON_ERROR_NONE' ) && JSON_ERROR_NONE === $last_error_code ) || empty( $last_error_code ) ) {
|
|
return false;
|
|
}
|
|
|
|
return json_last_error_msg();
|
|
}
|
|
|
|
/**
|
|
* Retrieves the site index.
|
|
*
|
|
* This endpoint describes the capabilities of the site.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param array $request {
|
|
* Request.
|
|
*
|
|
* @type string $context Context.
|
|
* }
|
|
* @return array Index entity
|
|
*/
|
|
public function get_index( $request ) {
|
|
// General site data.
|
|
$available = array(
|
|
'name' => get_option( 'blogname' ),
|
|
'description' => get_option( 'blogdescription' ),
|
|
'url' => get_option( 'siteurl' ),
|
|
'home' => home_url(),
|
|
'gmt_offset' => get_option( 'gmt_offset' ),
|
|
'timezone_string' => get_option( 'timezone_string' ),
|
|
'namespaces' => array_keys( $this->namespaces ),
|
|
'authentication' => array(),
|
|
'routes' => $this->get_data_for_routes( $this->get_routes(), $request['context'] ),
|
|
);
|
|
|
|
$response = new WP_REST_Response( $available );
|
|
|
|
$response->add_link( 'help', 'http://v2.wp-api.org/' );
|
|
|
|
/**
|
|
* Filters the API root index data.
|
|
*
|
|
* This contains the data describing the API. This includes information
|
|
* about supported authentication schemes, supported namespaces, routes
|
|
* available on the API, and a small amount of data about the site.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param WP_REST_Response $response Response data.
|
|
*/
|
|
return apply_filters( 'rest_index', $response );
|
|
}
|
|
|
|
/**
|
|
* Retrieves the index for a namespace.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param WP_REST_Request $request REST request instance.
|
|
* @return WP_REST_Response|WP_Error WP_REST_Response instance if the index was found,
|
|
* WP_Error if the namespace isn't set.
|
|
*/
|
|
public function get_namespace_index( $request ) {
|
|
$namespace = $request['namespace'];
|
|
|
|
if ( ! isset( $this->namespaces[ $namespace ] ) ) {
|
|
return new WP_Error( 'rest_invalid_namespace', __( 'The specified namespace could not be found.' ), array( 'status' => 404 ) );
|
|
}
|
|
|
|
$routes = $this->namespaces[ $namespace ];
|
|
$endpoints = array_intersect_key( $this->get_routes(), $routes );
|
|
|
|
$data = array(
|
|
'namespace' => $namespace,
|
|
'routes' => $this->get_data_for_routes( $endpoints, $request['context'] ),
|
|
);
|
|
$response = rest_ensure_response( $data );
|
|
|
|
// Link to the root index.
|
|
$response->add_link( 'up', rest_url( '/' ) );
|
|
|
|
/**
|
|
* Filters the namespace index data.
|
|
*
|
|
* This typically is just the route data for the namespace, but you can
|
|
* add any data you'd like here.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param WP_REST_Response $response Response data.
|
|
* @param WP_REST_Request $request Request data. The namespace is passed as the 'namespace' parameter.
|
|
*/
|
|
return apply_filters( 'rest_namespace_index', $response, $request );
|
|
}
|
|
|
|
/**
|
|
* Retrieves the publicly-visible data for routes.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param array $routes Routes to get data for.
|
|
* @param string $context Optional. Context for data. Accepts 'view' or 'help'. Default 'view'.
|
|
* @return array Route data to expose in indexes.
|
|
*/
|
|
public function get_data_for_routes( $routes, $context = 'view' ) {
|
|
$available = array();
|
|
|
|
// Find the available routes.
|
|
foreach ( $routes as $route => $callbacks ) {
|
|
$data = $this->get_data_for_route( $route, $callbacks, $context );
|
|
if ( empty( $data ) ) {
|
|
continue;
|
|
}
|
|
|
|
/**
|
|
* Filters the REST endpoint data.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param WP_REST_Request $request Request data. The namespace is passed as the 'namespace' parameter.
|
|
*/
|
|
$available[ $route ] = apply_filters( 'rest_endpoints_description', $data );
|
|
}
|
|
|
|
/**
|
|
* Filters the publicly-visible data for routes.
|
|
*
|
|
* This data is exposed on indexes and can be used by clients or
|
|
* developers to investigate the site and find out how to use it. It
|
|
* acts as a form of self-documentation.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param array $available Map of route to route data.
|
|
* @param array $routes Internal route data as an associative array.
|
|
*/
|
|
return apply_filters( 'rest_route_data', $available, $routes );
|
|
}
|
|
|
|
/**
|
|
* Retrieves publicly-visible data for the route.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param string $route Route to get data for.
|
|
* @param array $callbacks Callbacks to convert to data.
|
|
* @param string $context Optional. Context for the data. Accepts 'view' or 'help'. Default 'view'.
|
|
* @return array|null Data for the route, or null if no publicly-visible data.
|
|
*/
|
|
public function get_data_for_route( $route, $callbacks, $context = 'view' ) {
|
|
$data = array(
|
|
'namespace' => '',
|
|
'methods' => array(),
|
|
'endpoints' => array(),
|
|
);
|
|
|
|
if ( isset( $this->route_options[ $route ] ) ) {
|
|
$options = $this->route_options[ $route ];
|
|
|
|
if ( isset( $options['namespace'] ) ) {
|
|
$data['namespace'] = $options['namespace'];
|
|
}
|
|
|
|
if ( isset( $options['schema'] ) && 'help' === $context ) {
|
|
$data['schema'] = call_user_func( $options['schema'] );
|
|
}
|
|
}
|
|
|
|
$route = preg_replace( '#\(\?P<(\w+?)>.*?\)#', '{$1}', $route );
|
|
|
|
foreach ( $callbacks as $callback ) {
|
|
// Skip to the next route if any callback is hidden.
|
|
if ( empty( $callback['show_in_index'] ) ) {
|
|
continue;
|
|
}
|
|
|
|
$data['methods'] = array_merge( $data['methods'], array_keys( $callback['methods'] ) );
|
|
$endpoint_data = array(
|
|
'methods' => array_keys( $callback['methods'] ),
|
|
);
|
|
|
|
if ( isset( $callback['args'] ) ) {
|
|
$endpoint_data['args'] = array();
|
|
foreach ( $callback['args'] as $key => $opts ) {
|
|
$arg_data = array(
|
|
'required' => ! empty( $opts['required'] ),
|
|
);
|
|
if ( isset( $opts['default'] ) ) {
|
|
$arg_data['default'] = $opts['default'];
|
|
}
|
|
if ( isset( $opts['enum'] ) ) {
|
|
$arg_data['enum'] = $opts['enum'];
|
|
}
|
|
if ( isset( $opts['description'] ) ) {
|
|
$arg_data['description'] = $opts['description'];
|
|
}
|
|
if ( isset( $opts['type'] ) ) {
|
|
$arg_data['type'] = $opts['type'];
|
|
}
|
|
if ( isset( $opts['items'] ) ) {
|
|
$arg_data['items'] = $opts['items'];
|
|
}
|
|
$endpoint_data['args'][ $key ] = $arg_data;
|
|
}
|
|
}
|
|
|
|
$data['endpoints'][] = $endpoint_data;
|
|
|
|
// For non-variable routes, generate links.
|
|
if ( strpos( $route, '{' ) === false ) {
|
|
$data['_links'] = array(
|
|
'self' => rest_url( $route ),
|
|
);
|
|
}
|
|
}
|
|
|
|
if ( empty( $data['methods'] ) ) {
|
|
// No methods supported, hide the route.
|
|
return null;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Sends an HTTP status code.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param int $code HTTP status.
|
|
*/
|
|
protected function set_status( $code ) {
|
|
status_header( $code );
|
|
}
|
|
|
|
/**
|
|
* Sends an HTTP header.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param string $key Header key.
|
|
* @param string $value Header value.
|
|
*/
|
|
public function send_header( $key, $value ) {
|
|
/*
|
|
* Sanitize as per RFC2616 (Section 4.2):
|
|
*
|
|
* Any LWS that occurs between field-content MAY be replaced with a
|
|
* single SP before interpreting the field value or forwarding the
|
|
* message downstream.
|
|
*/
|
|
$value = preg_replace( '/\s+/', ' ', $value );
|
|
header( sprintf( '%s: %s', $key, $value ) );
|
|
}
|
|
|
|
/**
|
|
* Sends multiple HTTP headers.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param array $headers Map of header name to header value.
|
|
*/
|
|
public function send_headers( $headers ) {
|
|
foreach ( $headers as $key => $value ) {
|
|
$this->send_header( $key, $value );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes an HTTP header from the current response.
|
|
*
|
|
* @since 4.8.0
|
|
*
|
|
* @param string $key Header key.
|
|
*/
|
|
public function remove_header( $key ) {
|
|
if ( function_exists( 'header_remove' ) ) {
|
|
// In PHP 5.3+ there is a way to remove an already set header.
|
|
header_remove( $key );
|
|
} else {
|
|
// In PHP 5.2, send an empty header, but only as a last resort to
|
|
// override a header already sent.
|
|
foreach ( headers_list() as $header ) {
|
|
if ( 0 === stripos( $header, "$key:" ) ) {
|
|
$this->send_header( $key, '' );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieves the raw request entity (body).
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @global string $HTTP_RAW_POST_DATA Raw post data.
|
|
*
|
|
* @return string Raw request data.
|
|
*/
|
|
public static 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;
|
|
}
|
|
|
|
/**
|
|
* Extracts headers from a PHP-style $_SERVER array.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @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;
|
|
}
|
|
}
|