<?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 = tr