$args[ $param ] = $value;
}
}
foreach ( $handlers as $handler ) {
$callback = $handler['callback'];
// 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 ) ) {
return array( $route, $handler );
}
$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 );
return array( $route, $handler );
}
}
return new WP_Error(
'rest_no_route',
__( 'No route was found matching the URL and request method.' ),
array( 'status' => 404 )
);
}
/**
* Dispatches the request to the callback handler.
*
* @access private
* @since 5.6.0
*
* @param WP_REST_Request $request The request object.
* @param string $route The matched route regex.
* @param array $handler The matched route handler.
* @param WP_Error|null $response The current error object if any.
* @return WP_REST_Response
*/
protected function respond_to_request( $request, $route, $handler, $response ) {
/**
* 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_REST_Response|WP_HTTP_Response|WP_Error|mixed $response Result to send to the client.
* Usually a WP_REST_Response or WP_Error.
* @param array $handler Route handler used for the request.
* @param WP_REST_Request $request Request used to generate the response.
*/
$response = apply_filters( 'rest_request_before_callbacks', $response, $handler, $request );
// Check permission specified on the route.
if ( ! is_wp_error( $response ) && ! 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( $response ) ) {
/**
* Filters the REST API dispatch request result.
*
* Allow plugins to override dispatching the request.
*
* @since 4.4.0
* @since 4.5.0 Added `$route` and `$handler` parameters.
*
* @param mixed $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( $handler['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_REST_Response|WP_HTTP_Response|WP_Error|mixed $response Result to send to the client.
* Usually a WP_REST_Response or WP_Error.
* @param array $handler Route handler used for the request.
* @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;
}
/**
* 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 false|string Boolean false or string error message.
*/
protected function get_json_last_error() {
$last_error_code = json_last_error();
if ( 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 WP_REST_Response The API root index data.
*/
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 );
$fields = isset( $request['_fields'] ) ? $request['_fields'] : '';
$fields = wp_parse_list( $fields );
if ( empty( $fields ) ) {
$fields[] = '_links';
}
if ( $request->has_param( '_embed' ) ) {
$fields[] = '_embedded';
}
if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {
$response->add_link( 'help', 'https://developer.wordpress.org/rest-api/' );
$this->add_active_theme_link_to_index( $response );
$this->add_site_logo_to_index( $response );
$this->add_site_icon_to_index( $response );
} else {
if ( rest_is_field_included( 'site_logo', $fields ) ) {
$this->add_site_logo_to_index( $response );
}
if ( rest_is_field_included( 'site_icon', $fields ) || rest_is_field_included( 'site_icon_url', $fields ) ) {
$this->add_site_icon_to_index( $response );
}
}
/**
* Filters the REST API root index data.
*
* This contains the data describing the API. This includes information
* about supported authentication schemes, supported namespaces, routes
* available on the API, and a small amount of data about the site.
*
* @since 4.4.0
* @since 6.0.0 Added `$request` parameter.
*
* @param WP_REST_Response $response Response data.
* @param WP_REST_Request $request Request data.
*/
return apply_filters( 'rest_index', $response, $request );
}
/**
* Adds a link to the active theme for users who have proper permissions.
*
* @since 5.7.0
*
* @param WP_REST_Response $response REST API response.
*/
protected function add_active_theme_link_to_index( WP_REST_Response $response ) {
$should_add = current_user_can( 'switch_themes' ) || current_user_can( 'manage_network_themes' );
if ( ! $should_add && current_user_can( 'edit_posts' ) ) {
$should_add = true;
}
if ( ! $should_add ) {
foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) {
if ( current_user_can( $post_type->cap->edit_posts ) ) {
$should_add = true;
break;
}
}
}
if ( $should_add ) {
$theme = wp_get_theme();
$response->add_link( 'https://api.w.org/active-theme', rest_url( 'wp/v2/themes/' . $theme->get_stylesheet() ) );
}
}
/**
* Exposes the site logo through the WordPress REST API.
*
* This is used for fetching this information when user has no rights
* to update settings.
*
* @since 5.8.0
*
* @param WP_REST_Response $response REST API response.
*/
protected function add_site_logo_to_index( WP_REST_Response $response ) {
$site_logo_id = get_theme_mod( 'custom_logo', 0 );
$this->add_image_to_index( $response, $site_logo_id, 'site_logo' );
}
/**
* Exposes the site icon through the WordPress REST API.
*
* This is used for fetching this information when user has no rights
* to update settings.
*
* @since 5.9.0
*
* @param WP_REST_Response $response REST API response.
*/
protected function add_site_icon_to_index( WP_REST_Response $response ) {
$site_icon_id = get_option( 'site_icon', 0 );
$this->add_image_to_index( $response, $site_icon_id, 'site_icon' );
$response->data['site_icon_url'] = get_site_icon_url();
}
/**
* Exposes an image through the WordPress REST API.
* This is used for fetching this information when user has no rights
* to update settings.
*
* @since 5.9.0
*
* @param WP_REST_Response $response REST API response.
* @param int $image_id Image attachment ID.
* @param string $type Type of Image.
*/
protected function add_image_to_index( WP_REST_Response $response, $image_id, $type ) {
$response->data[ $type ] = (int) $image_id;
if ( $image_id ) {
$response->add_link(
'https://api.w.org/featuredmedia',
rest_url( rest_get_route_for_post( $image_id ) ),
array(
'embeddable' => true,
'type' => $type,
)
);
}
}
/**
* 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 REST API 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, keyed by route.
*/
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 publicly-visible data for a single REST API route.
*
* @since 4.4.0
*
* @param array $data Publicly-visible data for the route.
*/
$available[ $route ] = apply_filters( 'rest_endpoints_description', $data );
}
/**
* Filters the publicly-visible data for REST API 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 Route data to expose in indexes, keyed by route.
* @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(),
);
$allow_batch = false;
if ( isset( $this->route_options[ $route ] ) ) {
$options = $this->route_options[ $route ];
if ( isset( $options['namespace'] ) ) {
$data['namespace'] = $options['namespace'];
}
$allow_batch = isset( $options['allow_batch'] ) ? $options['allow_batch'] : false;
if ( isset( $options['schema'] ) && 'help' === $context ) {
$data['schema'] = call_user_func( $options['schema'] );
}
}
$allowed_schema_keywords = array_flip( rest_get_allowed_schema_keywords() );
$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'] ),
);
$callback_batch = isset( $callback['allow_batch'] ) ? $callback['allow_batch'] : $allow_batch;
if ( $callback_batch ) {
$endpoint_data['allow_batch'] = $callback_batch;
}
if ( isset( $callback['args'] ) ) {
$endpoint_data['args'] = array();
foreach ( $callback['args'] as $key => $opts ) {
if ( is_string( $opts ) ) {
$opts = array( $opts => 0 );
} elseif ( ! is_array( $opts ) ) {
$opts = array();
}
$arg_data = array_intersect_key( $opts, $allowed_schema_keywords );
$arg_data['required'] = ! empty( $opts['required'] );
$endpoint_data['args'][ $key ] = $arg_data;
}
}
$data['endpoints'][] = $endpoint_data;
// For non-variable routes, generate links.
if ( ! str_contains( $route, '{' ) ) {
$data['_links'] = array(
'self' => array(
array(
'href' => rest_url( $route ),
),
),
);
}
}
if ( empty( $data['methods'] ) ) {
// No methods supported, hide the route.
return null;
}
return $data;
}
/**
* Gets the maximum number of requests that can be included in a batch.
*
* @since 5.6.0
*
* @return int The maximum requests.
*/
protected function get_max_batch_size() {
/**
* Filters the maximum number of REST API requests that can be included in a batch.
*
* @since 5.6.0
*
* @param int $max_size The maximum size.
*/
return apply_filters( 'rest_get_max_batch_size', 25 );
}
/**
* Serves the batch/v1 request.
*
* @since 5.6.0
*
* @param WP_REST_Request $batch_request The batch request object.
* @return WP_REST_Response The generated response object.
*/
public function serve_batch_request_v1( WP_REST_Request $batch_request ) {
$requests = array();
foreach ( $batch_request['requests'] as $args ) {
$parsed_url = wp_parse_url( $args['path'] );
if ( false === $parsed_url ) {
$requests[] = new WP_Error( 'parse_path_failed', __( 'Could not parse the path.' ), array( 'status' => 400 ) );
continue;
}
$single_request = new WP_REST_Request( isset( $args['method'] ) ? $args['method'] : 'POST', $parsed_url['path'] );
if ( ! empty( $parsed_url['query'] ) ) {
$query_args = null; // Satisfy linter.
wp_parse_str( $parsed_url['query'], $query_args );
$single_request->set_query_params( $query_args );
}
if ( ! empty( $args['body'] ) ) {
$single_request->set_body_params( $args['body'] );
}
if ( ! empty( $args['headers'] ) ) {
$single_request->set_headers( $args['headers'] );
}
$requests[] = $single_request;
}
$matches = array();
$validation = array();
$has_error = false;
foreach ( $requests as $single_request ) {
$match = $this->match_request_to_handler( $single_request );
$matches[] = $match;
$error = null;
if ( is_wp_error( $match ) ) {
$error = $match;
}
if ( ! $error ) {
list( $route, $handler ) = $match;
if ( isset( $handler['allow_batch'] ) ) {
$allow_batch = $handler['allow_batch'];
} else {
$route_options = $this->get_route_options( $route );
$allow_batch = isset( $route_options['allow_batch'] ) ? $route_options['allow_batch'] : false;
}
if ( ! is_array( $allow_batch ) || empty( $allow_batch['v1'] ) ) {
$error = new WP_Error(
'rest_batch_not_allowed',
__( 'The requested route does not support batch requests.' ),
array( 'status' => 400 )
);
}
}
if ( ! $error ) {
$check_required = $single_request->has_valid_params();
if ( is_wp_error( $check_required ) ) {
$error = $check_required;
}
}
if ( ! $error ) {
$check_sanitized = $single_request->sanitize_params();
if ( is_wp_error( $check_sanitized ) ) {
$error = $check_sanitized;
}
}
if ( $error ) {
$has_error = true;
$validation[] = $error;
} else {
$validation[] = true;
}
}
$responses = array();
if ( $has_error && 'require-all-validate' === $batch_request['validation'] ) {
foreach ( $validation as $valid ) {
if ( is_wp_error( $valid ) ) {
$responses[] = $this->envelope_response( $this->error_to_response( $valid ), false )->get_data();
} else {
$responses[] = null;
}
}
return new WP_REST_Response(
array(
'failed' => 'validation',
'responses' => $responses,
),
WP_Http::MULTI_STATUS
);
}
foreach ( $requests as $i => $single_request ) {
$clean_request = clone $single_request;
$clean_request->set_url_params( array() );
$clean_request->set_attributes( array() );
$clean_request->set_default_params( array() );
/** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
$result = apply_filters( 'rest_pre_dispatch', null, $this, $clean_request );
if ( empty( $result ) ) {
$match = $matches[ $i ];
$error = null;
if ( is_wp_error( $validation[ $i ] ) ) {
$error = $validation[ $i ];
}
if ( is_wp_error( $match ) ) {
$result = $this->error_to_response( $match );
} else {
list( $route, $handler ) = $match;
if ( ! $error && ! is_callable( $handler['callback'] ) ) {
$error = new WP_Error(
'rest_invalid_handler',
__( 'The handler for the route is invalid' ),
array( 'status' => 500 )
);
}
$result = $this->respond_to_request( $single_request, $route, $handler, $error );
}
}
/** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
$result = apply_filters( 'rest_post_dispatch', rest_ensure_response( $result ), $this, $single_request );
$responses[] = $this->envelope_response( $result, false )->get_data();
}
return new WP_REST_Response( array( 'responses' => $responses ), WP_Http::MULTI_STATUS );
}
/**
* 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 ) {
header_remove( $key );
}
/**
* 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() {
// phpcs:disable PHPCompatibility.Variables.RemovedPredefinedGlobalVariables.http_raw_post_dataDeprecatedRemoved
global $HTTP_RAW_POST_DATA;
// $HTTP_RAW_POST_DATA was deprecated in PHP 5.6 and removed in PHP 7.0.
if ( ! isset( $HTTP_RAW_POST_DATA ) ) {
$HTTP_RAW_POST_DATA = file_get_contents( 'php://input' );
}
return $HTTP_RAW_POST_DATA;
// phpcs:enable
}
/**
* 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 ( str_starts_with( $key, 'HTTP_' ) ) {
$headers[ substr( $key, 5 ) ] = $value;
} elseif ( 'REDIRECT_HTTP_AUTHORIZATION' === $key && empty( $server['HTTP_AUTHORIZATION'] ) ) {
/*
* In some server configurations, the authorization header is passed in this alternate location.
* Since it would not be passed in in both places we do not check for both headers and resolve.
*/
$headers['AUTHORIZATION'] = $value;
} elseif ( isset( $additional[ $key ] ) ) {
$headers[ $key ] = $value;
}
}
return $headers;
}
}
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