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<?php /** * REST API: WP_REST_Request class * * @package WordPress * @subpackage REST_API * @since 4.4.0 */ /** * Core class used to implement a REST request object. * * Contains data from the request, to be passed to the callback. * * Note: This implements ArrayAccess, and acts as an array of parameters when * used in that manner. It does not use ArrayObject (as we cannot rely on SPL), * so be aware it may have non-array behavior in some cases. * * Note: When using features provided by ArrayAccess, be aware that WordPress deliberately * does not distinguish between arguments of the same name for different request methods. * For instance, in a request with `GET id=1` and `POST id=2`, `$request['id']` will equal * 2 (`POST`) not 1 (`GET`). For more precision between request methods, use * WP_REST_Request::get_body_params(), WP_REST_Request::get_url_params(), etc. * * @since 4.4.0 * * @link https://www.php.net/manual/en/class.arrayaccess.php */ #[AllowDynamicProperties] class WP_REST_Request implements ArrayAccess { /** * HTTP method. * * @since 4.4.0 * @var string */ protected $method = ''; /** * Parameters passed to the request. * * These typically come from the `$_GET`, `$_POST` and `$_FILES` * superglobals when being created from the global scope. * * @since 4.4.0 * @var array Contains GET, POST and FILES keys mapping to arrays of data. */ protected $params; /** * HTTP headers for the request. * * @since 4.4.0 * @var array Map of key to value. Key is always lowercase, as per HTTP specification. */ protected $headers = array(); /** * Body data. * * @since 4.4.0 * @var string Binary data from the request. */ protected $body = null; /** * Route matched for the request. * * @since 4.4.0 * @var string */ protected $route; /** * Attributes (options) for the route that was matched. * * This is the options array used when the route was registered, typically * containing the callback as well as the valid methods for the route. * * @since 4.4.0 * @var array Attributes for the request. */ protected $attributes = array(); /** * Used to determine if the JSON data has been parsed yet. * * Allows lazy-parsing of JSON data where possible. * * @since 4.4.0 * @var bool */ protected $parsed_json = false; /** * Used to determine if the body data has been parsed yet. * * @since 4.4.0 * @var bool */ protected $parsed_body = false; /** * Constructor. * * @since 4.4.0 * * @param string $method Optional. Request method. Default empty. * @param string $route Optional. Request route. Default empty. * @param array $attributes Optional. Request attributes. Default empty array. */ public function __construct( $method = '', $route = '', $attributes = array() ) { $this->params = array( 'URL' => array(), 'GET' => array(), 'POST' => array(), 'FILES' => array(), // See parse_json_params. 'JSON' => null, 'defaults' => array(), ); $this->set_method( $method ); $this->set_route( $route ); $this->set_attributes( $attributes ); } /** * Retrieves the HTTP method for the request. * * @since 4.4.0 * * @return string HTTP method. */ public function get_method() { return $this->method; } /** * Sets HTTP method for the request. * * @since 4.4.0 * * @param string $method HTTP method. */ public function set_method( $method ) { $this->method = strtoupper( $method ); } /** * Retrieves all headers from the request. * * @since 4.4.0 * * @return array Map of key to value. Key is always lowercase, as per HTTP specification. */ public function get_headers() { return $this->headers; } /** * Determines if the request is the given method. * * @since 6.8.0 * * @param string $method HTTP method. * @return bool Whether the request is of the given method. */ public function is_method( $method ) { return $this->get_method() === strtoupper( $method ); } /** * Canonicalizes the header name. * * Ensures that header names are always treated the same regardless of * source. Header names are always case-insensitive. * * Note that we treat `-` (dashes) and `_` (underscores) as the same * character, as per header parsing rules in both Apache and nginx. * * @link https://stackoverflow.com/q/18185366 * @link https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/#missing-disappearing-http-headers * @link https://nginx.org/en/docs/http/ngx_http_core_module.html#underscores_in_headers * * @since 4.4.0 * * @param string $key Header name. * @return string Canonicalized name. */ public static function canonicalize_header_name( $key ) { $key = strtolower( $key ); $key = str_replace( '-', '_', $key ); return $key; } /** * Retrieves the given header from the request. * * If the header has multiple values, they will be concatenated with a comma * as per the HTTP specification. Be aware that some non-compliant headers * (notably cookie headers) cannot be joined this way. * * @since 4.4.0 * * @param string $key Header name, will be canonicalized to lowercase. * @return string|null String value if set, null otherwise. */ public function get_header( $key ) { $key = $this->canonicalize_header_name( $key ); if ( ! isset( $this->headers[ $key ] ) ) { return null; } return implode( ',', $this->headers[ $key ] ); } /** * Retrieves header values from the request. * * @since 4.4.0 * * @param string $key Header name, will be canonicalized to lowercase. * @return array|null List of string values if set, null otherwise. */ public function get_header_as_array( $key ) { $key = $this->canonicalize_header_name( $key ); if ( ! isset( $this->headers[ $key ] ) ) { return null; } return $this->headers[ $key ]; } /** * Sets the header on request. * * @since 4.4.0 * * @param string $key Header name. * @param string $value Header value, or list of values. */ public function set_header( $key, $value ) { $key = $this->canonicalize_header_name( $key ); $value = (array) $value; $this->headers[ $key ] = $value; } /** * Appends a header value for the given header. * * @since 4.4.0 * * @param string $key Header name. * @param string $value Header value, or list of values. */ public function add_header( $key, $value ) { $key = $this->canonicalize_header_name( $key ); $value = (array) $value; if ( ! isset( $this->headers[ $key ] ) ) { $this->headers[ $key ] = array(); } $this->headers[ $key ] = array_merge( $this->headers[ $key ], $value ); } /** * Removes all values for a header. * * @since 4.4.0 * * @param string $key Header name. */ public function remove_header( $key ) { $key = $this->canonicalize_header_name( $key ); unset( $this->headers[ $key ] ); } /** * Sets headers on the request. * * @since 4.4.0 * * @param array $headers Map of header name to value. * @param bool $override If true, replace the request's headers. Otherwise, merge with existing. */ public function set_headers( $headers, $override = true ) { if ( true === $override ) { $this->headers = array(); } foreach ( $headers as $key => $value ) { $this->set_header( $key, $value ); } } /** * Retrieves the Content-Type of the request. * * @since 4.4.0 * * @return array|null Map containing 'value' and 'parameters' keys * or null when no valid Content-Type header was * available. */ public function get_content_type() { $value = $this->get_header( 'Content-Type' ); if ( empty( $value ) ) { return null; } $parameters = ''; if ( strpos( $value, ';' ) ) { list( $value, $parameters ) = explode( ';', $value, 2 ); } $value = strtolower( $value ); if ( ! str_contains( $value, '/' ) ) { return null; } // Parse type and subtype out. list( $type, $subtype ) = explode( '/', $value, 2 ); $data = compact( 'value', 'type', 'subtype', 'parameters' ); $data = array_map( 'trim', $data ); return $data; } /** * Checks if the request has specified a JSON Content-Type. * * @since 5.6.0 * * @return bool True if the Content-Type header is JSON. */ public function is_json_content_type() { $content_type = $this->get_content_type(); return isset( $content_type['value'] ) && wp_is_json_media_type( $content_type['value'] ); } /** * Retrieves the parameter priority order. * * Used when checking parameters in WP_REST_Request::get_param(). * * @since 4.4.0 * * @return string[] Array of types to check, in order of priority. */ protected function get_parameter_order() { $order = array(); if ( $this->is_json_content_type() ) { $order[] = 'JSON'; } $this->parse_json_params(); // Ensure we parse the body data. $body = $this->get_body(); if ( 'POST' !== $this->method && ! empty( $body ) ) { $this->parse_body_params(); } $accepts_body_data = array( 'POST', 'PUT', 'PATCH', 'DELETE' ); if ( in_array( $this->method, $accepts_body_data, true ) ) { $order[] = 'POST'; } $order[] = 'GET'; $order[] = 'URL'; $order[] = 'defaults'; /** * Filters the parameter priority order for a REST API request. * * The order affects which parameters are checked when using WP_REST_Request::get_param() * and family. This acts similarly to PHP's `request_order` setting. * * @since 4.4.0 * * @param string[] $order Array of types to check, in order of priority. * @param WP_REST_Request $request The request object. */ return apply_filters( 'rest_request_parameter_order', $order, $this ); } /** * Retrieves a parameter from the request. * * @since 4.4.0 * * @param string $key Parameter name. * @return mixed|null Value if set, null otherwise. */ public function get_param( $key ) { $order = $this->get_parameter_order(); foreach ( $order as $type ) { // Determine if we have the parameter for this type. if ( isset( $this->params[ $type ][ $key ] ) ) { return $this->params[ $type ][ $key ]; } } return null; } /** * Checks if a parameter exists in the request. * * This allows distinguishing between an omitted parameter, * and a parameter specifically set to null. * * @since 5.3.0 * * @param string $key Parameter name. * @return bool True if a param exists for the given key. */ public function has_param( $key ) { $order = $this->get_parameter_order(); foreach ( $order as $type ) { if ( is_array( $this->params[ $type ] ) && array_key_exists( $key, $this->params[ $type ] ) ) { return true; } } return false; } /** * Sets a parameter on the request. * * If the given parameter key exists in any parameter type an update will take place, * otherwise a new param will be created in the first parameter type (respecting * get_parameter_order()). * * @since 4.4.0 * * @param string $key Parameter name. * @param mixed $value Parameter value. */ public function set_param( $key, $value ) { $order = $this->get_parameter_order(); $found_key = false; foreach ( $order as $type ) { if ( 'defaults' !== $type && is_array( $this->params[ $type ] ) && array_key_exists( $key, $this->params[ $type ] ) ) { $this->params[ $type ][ $key ] = $value; $found_key = true; } } if ( ! $found_key ) { $this->params[ $order[0] ][ $key ] = $value; } } /** * Retrieves merged parameters from the request. * * The equivalent of get_param(), but returns all parameters for the request. * Handles merging all the available values into a single array. * * @since 4.4.0 * * @return array Map of key to value. */ public function get_params() { $order = $this->get_parameter_order(); $order = array_reverse( $order, true ); $params = array(); foreach ( $order as $type ) { /* * array_merge() / the "+" operator will mess up * numeric keys, so instead do a manual foreach. */ foreach ( (array) $this->params[ $type ] as $key => $value ) { $params[ $key ] = $value; } } // Exclude rest_route if pretty permalinks are not enabled. if ( ! get_option( 'permalink_structure' ) ) { unset( $params['rest_route'] ); } return $params; } /** * Retrieves parameters from the route itself. * * These are parsed from the URL using the regex. * * @since 4.4.0 * * @return array Parameter map of key to value. */ public function get_url_params() { return $this->params['URL']; } /** * Sets parameters from the route. * * Typically, this is set after parsing the URL. * * @since 4.4.0 * * @param array $params Parameter map of key to value. */ public function set_url_params( $params ) { $this->params['URL'] = $params; } /** * Retrieves parameters from the query string. * * These are the parameters you'd typically find in `$_GET`. * * @since 4.4.0 * * @return array Parameter map of key to value. */ public function get_query_params() { return $this->params['GET']; } /** * Sets parameters from the query string. * * Typically, this is set from `$_GET`. * * @since 4.4.0 * * @param array $params Parameter map of key to value. */ public function set_query_params( $params ) { $this->params['GET'] = $params; } /** * Retrieves parameters from the body. * * These are the parameters you'd typically find in `$_POST`. * * @since 4.4.0 * * @return array Parameter map of key to value. */ public function get_body_params() { return $this->params['POST']; } /** * Sets parameters from the body. * * Typically, this is set from `$_POST`. * * @since 4.4.0 * * @param array $params Parameter map of key to value. */ public function set_body_params( $params ) { $this->params['POST'] = $params; } /** * Retrieves multipart file parameters from the body. * * These are the parameters you'd typically find in `$_FILES`. * * @since 4.4.0 * * @return array Parameter map of key to value. */ public function get_file_params() { return $this->params['FILES']; } /** * Sets multipart file parameters from the body. * * Typically, this is set from `$_FILES`. * * @since 4.4.0 * * @param array $params Parameter map of key to value. */ public function set_file_params( $params ) { $this->params['FILES'] = $params; } /** * Retrieves the default parameters. * * These are the parameters set in the route registration. * * @since 4.4.0 * * @return array Parameter map of key to value. */ public function get_default_params() { return $this->params['defaults']; } /** * Sets default parameters. * * These are the parameters set in the route registration. * * @since 4.4.0 * * @param array $params Parameter map of key to value. */ public function set_default_params( $params ) { $this->params['defaults'] = $params; } /** * Retrieves the request body content. * * @since 4.4.0 * * @return string Binary data from the request body. */ public function get_body() { return $this->body; } /** * Sets body content. * * @since 4.4.0 * * @param string $data Binary data from the request body. */ public function set_body( $data ) { $this->body = $data; // Enable lazy parsing. $this->parsed_json = false; $this->parsed_body = false; $this->params['JSON'] = null; } /** * Retrieves the parameters from a JSON-formatted body. * * @since 4.4.0 * * @return array Parameter map of key to value. */ public function get_json_params() { // Ensure the parameters have been parsed out. $this->parse_json_params(); return $this->params['JSON']; } /** * Parses the JSON parameters. * * Avoids parsing the JSON data until we need to access it. * * @since 4.4.0 * @since 4.7.0 Returns error instance if value cannot be decoded. * @return true|WP_Error True if the JSON data was passed or no JSON data was provided, WP_Error if invalid JSON was passed. */ protected function parse_json_params() { if ( $this->parsed_json ) { return true; } $this->parsed_json = true; // Check that we actually got JSON. if ( ! $this->is_json_content_type() ) { return true; } $body = $this->get_body(); if ( empty( $body ) ) { return true; } $params = json_decode( $body, true ); /* * Check for a parsing error. */ if ( null === $params && JSON_ERROR_NONE !== json_last_error() ) { // Ensure subsequent calls receive error instance. $this->parsed_json = false; $error_data = array( 'status' => WP_Http::BAD_REQUEST, 'json_error_code' => json_last_error(), 'json_error_message' => json_last_error_msg(), ); return new WP_Error( 'rest_invalid_json', __( 'Invalid JSON body passed.' ), $error_data ); } $this->params['JSON'] = $params; return true; } /** * Parses the request body parameters. * * Parses out URL-encoded bodies for request methods that aren't supported * natively by PHP. * * @since 4.4.0 */ protected function parse_body_params() { if ( $this->parsed_body ) { return; } $this->parsed_body = true; /* * Check that we got URL-encoded. Treat a missing Content-Type as * URL-encoded for maximum compatibility. */ $content_type = $this->get_content_type(); if ( ! empty( $content_type ) && 'application/x-www-form-urlencoded' !== $content_type['value'] ) { return; } parse_str( $this->get_body(), $params ); /* * Add to the POST parameters stored internally. If a user has already * set these manually (via `set_body_params`), don't override them. */ $this->params['POST'] = array_merge( $params, $this->params['POST'] ); } /** * Retrieves the route that matched the request. * * @since 4.4.0 * * @return string Route matching regex. */ public function get_route() { return $this->route; } /** * Sets the route that matched the request. * * @since 4.4.0 * * @param string $route Route matching regex. */ public function set_route( $route ) { $this->route = $route; } /** * Retrieves the attributes for the request. * * These are the options for the route that was matched. * * @since 4.4.0 * * @return array Attributes for the request. */ public function get_attributes() { return $this->attributes; } /** * Sets the attributes for the request. * * @since 4.4.0 * * @param array $attributes Attributes for the request. */ public function set_attributes( $attributes ) { $this->attributes = $attributes; } /** * Sanitizes (where possible) the params on the request. * * This is primarily based off the sanitize_callback param on each registered * argument. * * @since 4.4.0 * * @return true|WP_Error True if parameters were sanitized, WP_Error if an error occurred during sanitization. */ public function sanitize_params() { $attributes = $this->get_attributes(); // No arguments set, skip sanitizing. if ( empty( $attributes['args'] ) ) { return true; } $order = $this->get_parameter_order(); $invalid_params = array(); $invalid_details = array(); foreach ( $order as $type ) { if ( empty( $this->params[ $type ] ) ) { continue; } foreach ( $this->params[ $type ] as $key => $value ) { if ( ! isset( $attributes['args'][ $key ] ) ) { continue; } $param_args = $attributes['args'][ $key ]; // If the arg has a type but no sanitize_callback attribute, default to rest_parse_request_arg. if ( ! array_key_exists( 'sanitize_callback', $param_args ) && ! empty( $param_args['type'] ) ) { $param_args['sanitize_callback'] = 'rest_parse_request_arg'; } // If there's still no sanitize_callback, nothing to do here. if ( empty( $param_args['sanitize_callback'] ) ) { continue; } /** @var mixed|WP_Error $sanitized_value */ $sanitized_value = call_user_func( $param_args['sanitize_callback'], $value, $this, $key ); if ( is_wp_error( $sanitized_value ) ) { $invalid_params[ $key ] = implode( ' ', $sanitized_value->get_error_messages() ); $invalid_details[ $key ] = rest_convert_error_to_response( $sanitized_value )->get_data(); } else { $this->params[ $type ][ $key ] = $sanitized_value; } } } if ( $invalid_params ) { return new WP_Error( 'rest_invalid_param', /* translators: %s: List of invalid parameters. */ sprintf( __( 'Invalid parameter(s): %s' ), implode( ', ', array_keys( $invalid_params ) ) ), array( 'status' => 400, 'params' => $invalid_params, 'details' => $invalid_details, ) ); } return true; } /** * Checks whether this request is valid according to its attributes. * * @since 4.4.0 * * @return true|WP_Error True if there are no parameters to validate or if all pass validation, * WP_Error if required parameters are missing. */ public function has_valid_params() { // If JSON data was passed, check for errors. $json_error = $this->parse_json_params(); if ( is_wp_error( $json_error ) ) { return $json_error; } $attributes = $this->get_attributes(); $required = array(); $args = empty( $attributes['args'] ) ? array() : $attributes['args']; foreach ( $args as $key => $arg ) { $param = $this->get_param( $key ); if ( isset( $arg['required'] ) && true === $arg['required'] && null === $param ) { $required[] = $key; } } if ( ! empty( $required ) ) { return new WP_Error( 'rest_missing_callback_param', /* translators: %s: List of required parameters. */ sprintf( __( 'Missing parameter(s): %s' ), implode( ', ', $required ) ), array( 'status' => 400, 'params' => $required, ) ); } /* * Check the validation callbacks for each registered arg. * * This is done after required checking as required checking is cheaper. */ $invalid_params = array(); $invalid_details = array(); foreach ( $args as $key => $arg ) { $param = $this->get_param( $key ); if ( null !== $param && ! empty( $arg['validate_callback'] ) ) { /** @var bool|\WP_Error $valid_check */ $valid_check = call_user_func( $arg['validate_callback'], $param, $this, $key ); if ( false === $valid_check ) { $invalid_params[ $key ] = __( 'Invalid parameter.' ); } if ( is_wp_error( $valid_check ) ) { $invalid_params[ $key ] = implode( ' ', $valid_check->get_error_messages() ); $invalid_details[ $key ] = rest_convert_error_to_response( $valid_check )->get_data(); } } } if ( $invalid_params ) { return new WP_Error( 'rest_invalid_param', /* translators: %s: List of invalid parameters. */ sprintf( __( 'Invalid parameter(s): %s' ), implode( ', ', array_keys( $invalid_params ) ) ), array( 'status' => 400, 'params' => $invalid_params, 'details' => $invalid_details, ) ); } if ( isset( $attributes['validate_callback'] ) ) { $valid_check = call_user_func( $attributes['validate_callback'], $this ); if ( is_wp_error( $valid_check ) ) { return $valid_check; } if ( false === $valid_check ) { // A WP_Error instance is preferred, but false is supported for parity with the per-arg validate_callback. return new WP_Error( 'rest_invalid_params', __( 'Invalid parameters.' ), array( 'status' => 400 ) ); } } return true; } /** * Checks if a parameter is set. * * @since 4.4.0 * * @param string $offset Parameter name. * @return bool Whether the parameter is set. */ #[ReturnTypeWillChange] public function offsetExists( $offset ) { $order = $this->get_parameter_order(); foreach ( $order as $type ) { if ( isset( $this->params[ $type ][ $offset ] ) ) { return true; } } return false; } /** * Retrieves a parameter from the request. * * @since 4.4.0 * * @param string $offset Parameter name. * @return mixed|null Value if set, null otherwise. */ #[ReturnTypeWillChange] public function offsetGet( $offset ) { return $this->get_param( $offset ); } /** * Sets a parameter on the request. * * @since 4.4.0 * * @param string $offset Parameter name. * @param mixed $value Parameter value. */ #[ReturnTypeWillChange] public function offsetSet( $offset, $value ) { $this->set_param( $offset, $value ); } /** * Removes a parameter from the request. * * @since 4.4.0 * * @param string $offset Parameter name. */ #[ReturnTypeWillChange] public function offsetUnset( $offset ) { $order = $this->get_parameter_order(); // Remove the offset from every group. foreach ( $order as $type ) { unset( $this->params[ $type ][ $offset ] ); } } /** * Retrieves a WP_REST_Request object from a full URL. * * @since 4.5.0 * * @param string $url URL with protocol, domain, path and query args. * @return WP_REST_Request|false WP_REST_Request object on success, false on failure. */ public static function from_url( $url ) { $bits = parse_url( $url ); $query_params = array(); if ( ! empty( $bits['query'] ) ) { wp_parse_str( $bits['query'], $query_params ); } $api_root = rest_url(); if ( get_option( 'permalink_structure' ) && str_starts_with( $url, $api_root ) ) { // Pretty permalinks on, and URL is under the API root. $api_url_part = substr( $url, strlen( untrailingslashit( $api_root ) ) ); $route = parse_url( $api_url_part, PHP_URL_PATH ); } elseif ( ! empty( $query_params['rest_route'] ) ) { // ?rest_route=... set directly. $route = $query_params['rest_route']; unset( $query_params['rest_route'] ); } $request = false; if ( ! empty( $route ) ) { $request = new WP_REST_Request( 'GET', $route ); $request->set_query_params( $query_params ); } /** * Filters the REST API request generated from a URL. * * @since 4.5.0 * * @param WP_REST_Request|false $request Generated request object, or false if URL * could not be parsed. * @param string $url URL the request was generated from. */ return apply_filters( 'rest_request_from_url', $request, $url ); } }
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