668 lines
19 KiB
PHP
668 lines
19 KiB
PHP
<?php
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/**
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* Core HTTP Request API
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*
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* Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
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* decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
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*
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* @package WordPress
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* @subpackage HTTP
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*/
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/**
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* Returns the initialized WP_Http Object
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*
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* @since 2.7.0
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* @access private
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*
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* @staticvar WP_Http $http
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*
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* @return WP_Http HTTP Transport object.
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*/
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function _wp_http_get_object() {
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static $http = null;
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if ( is_null( $http ) ) {
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$http = new WP_Http();
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}
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return $http;
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}
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/**
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* Retrieve the raw response from a safe HTTP request.
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*
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* This function is ideal when the HTTP request is being made to an arbitrary
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* URL. The URL is validated to avoid redirection and request forgery attacks.
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*
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* @since 3.6.0
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*
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* @see wp_remote_request() For more information on the response array format.
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* @see WP_Http::request() For default arguments information.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_safe_remote_request( $url, $args = array() ) {
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$args['reject_unsafe_urls'] = true;
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$http = _wp_http_get_object();
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return $http->request( $url, $args );
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}
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/**
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* Retrieve the raw response from a safe HTTP request using the GET method.
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*
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* This function is ideal when the HTTP request is being made to an arbitrary
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* URL. The URL is validated to avoid redirection and request forgery attacks.
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*
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* @since 3.6.0
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*
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* @see wp_remote_request() For more information on the response array format.
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* @see WP_Http::request() For default arguments information.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_safe_remote_get( $url, $args = array() ) {
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$args['reject_unsafe_urls'] = true;
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$http = _wp_http_get_object();
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return $http->get( $url, $args );
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}
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/**
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* Retrieve the raw response from a safe HTTP request using the POST method.
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*
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* This function is ideal when the HTTP request is being made to an arbitrary
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* URL. The URL is validated to avoid redirection and request forgery attacks.
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*
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* @since 3.6.0
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*
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* @see wp_remote_request() For more information on the response array format.
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* @see WP_Http::request() For default arguments information.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_safe_remote_post( $url, $args = array() ) {
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$args['reject_unsafe_urls'] = true;
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$http = _wp_http_get_object();
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return $http->post( $url, $args );
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}
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/**
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* Retrieve the raw response from a safe HTTP request using the HEAD method.
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*
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* This function is ideal when the HTTP request is being made to an arbitrary
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* URL. The URL is validated to avoid redirection and request forgery attacks.
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*
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* @since 3.6.0
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*
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* @see wp_remote_request() For more information on the response array format.
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* @see WP_Http::request() For default arguments information.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_safe_remote_head( $url, $args = array() ) {
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$args['reject_unsafe_urls'] = true;
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$http = _wp_http_get_object();
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return $http->head( $url, $args );
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}
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/**
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* Retrieve the raw response from the HTTP request.
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*
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* The array structure is a little complex:
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*
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* $res = array(
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* 'headers' => array(),
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* 'response' => array(
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* 'code' => int,
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* 'message' => string
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* )
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* );
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*
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* All of the headers in $res['headers'] are with the name as the key and the
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* value as the value. So to get the User-Agent, you would do the following.
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*
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* $user_agent = $res['headers']['user-agent'];
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*
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* The body is the raw response content and can be retrieved from $res['body'].
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*
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* This function is called first to make the request and there are other API
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* functions to abstract out the above convoluted setup.
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*
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* Request method defaults for helper functions:
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* - Default 'GET' for wp_remote_get()
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* - Default 'POST' for wp_remote_post()
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* - Default 'HEAD' for wp_remote_head()
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*
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* @since 2.7.0
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*
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* @see WP_Http::request() For additional information on default arguments.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_remote_request($url, $args = array()) {
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$http = _wp_http_get_object();
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return $http->request( $url, $args );
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}
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/**
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* Retrieve the raw response from the HTTP request using the GET method.
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*
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* @since 2.7.0
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*
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* @see wp_remote_request() For more information on the response array format.
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* @see WP_Http::request() For default arguments information.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_remote_get($url, $args = array()) {
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$http = _wp_http_get_object();
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return $http->get( $url, $args );
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}
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/**
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* Retrieve the raw response from the HTTP request using the POST method.
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*
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* @since 2.7.0
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*
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* @see wp_remote_request() For more information on the response array format.
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* @see WP_Http::request() For default arguments information.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_remote_post($url, $args = array()) {
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$http = _wp_http_get_object();
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return $http->post( $url, $args );
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}
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/**
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* Retrieve the raw response from the HTTP request using the HEAD method.
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*
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* @since 2.7.0
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*
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* @see wp_remote_request() For more information on the response array format.
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* @see WP_Http::request() For default arguments information.
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*
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* @param string $url Site URL to retrieve.
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* @param array $args Optional. Request arguments. Default empty array.
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* @return WP_Error|array The response or WP_Error on failure.
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*/
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function wp_remote_head($url, $args = array()) {
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$http = _wp_http_get_object();
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return $http->head( $url, $args );
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}
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/**
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* Retrieve only the headers from the raw response.
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*
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* @since 2.7.0
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*
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* @param array $response HTTP response.
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* @return array The headers of the response. Empty array if incorrect parameter given.
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*/
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function wp_remote_retrieve_headers( $response ) {
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if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers']))
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return array();
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return $response['headers'];
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}
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/**
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* Retrieve a single header by name from the raw response.
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*
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* @since 2.7.0
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*
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* @param array $response
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* @param string $header Header name to retrieve value from.
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* @return string The header value. Empty string on if incorrect parameter given, or if the header doesn't exist.
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*/
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function wp_remote_retrieve_header( $response, $header ) {
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if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers']))
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return '';
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if ( array_key_exists($header, $response['headers']) )
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return $response['headers'][$header];
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return '';
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}
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/**
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* Retrieve only the response code from the raw response.
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*
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* Will return an empty array if incorrect parameter value is given.
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*
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* @since 2.7.0
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*
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* @param array $response HTTP response.
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* @return int|string The response code as an integer. Empty string on incorrect parameter given.
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*/
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function wp_remote_retrieve_response_code( $response ) {
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if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response']))
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return '';
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return $response['response']['code'];
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}
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/**
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* Retrieve only the response message from the raw response.
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*
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* Will return an empty array if incorrect parameter value is given.
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*
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* @since 2.7.0
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*
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* @param array $response HTTP response.
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* @return string The response message. Empty string on incorrect parameter given.
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*/
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function wp_remote_retrieve_response_message( $response ) {
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if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response']))
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return '';
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return $response['response']['message'];
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}
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/**
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* Retrieve only the body from the raw response.
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*
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* @since 2.7.0
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*
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* @param array $response HTTP response.
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* @return string The body of the response. Empty string if no body or incorrect parameter given.
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*/
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function wp_remote_retrieve_body( $response ) {
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if ( is_wp_error($response) || ! isset($response['body']) )
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return '';
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return $response['body'];
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}
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/**
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* Retrieve only the cookies from the raw response.
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*
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* @since 4.4.0
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*
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* @param array $response HTTP response.
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* @return array An array of `WP_Http_Cookie` objects from the response. Empty array if there are none, or the response is a WP_Error.
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*/
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function wp_remote_retrieve_cookies( $response ) {
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if ( is_wp_error( $response ) || empty( $response['cookies'] ) ) {
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return array();
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}
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return $response['cookies'];
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}
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/**
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* Retrieve a single cookie by name from the raw response.
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*
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* @since 4.4.0
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*
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* @param array $response HTTP response.
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* @param string $name The name of the cookie to retrieve.
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* @return WP_Http_Cookie|string The `WP_Http_Cookie` object. Empty string if the cookie isn't present in the response.
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*/
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function wp_remote_retrieve_cookie( $response, $name ) {
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$cookies = wp_remote_retrieve_cookies( $response );
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if ( empty( $cookies ) ) {
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return '';
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}
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foreach ( $cookies as $cookie ) {
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if ( $cookie->name === $name ) {
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return $cookie;
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}
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}
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return '';
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}
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/**
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* Retrieve a single cookie's value by name from the raw response.
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*
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* @since 4.4.0
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*
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* @param array $response HTTP response.
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* @param string $name The name of the cookie to retrieve.
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* @return string The value of the cookie. Empty string if the cookie isn't present in the response.
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*/
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function wp_remote_retrieve_cookie_value( $response, $name ) {
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$cookie = wp_remote_retrieve_cookie( $response, $name );
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if ( ! is_a( $cookie, 'WP_Http_Cookie' ) ) {
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return '';
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}
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return $cookie->value;
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}
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/**
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* Determines if there is an HTTP Transport that can process this request.
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*
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* @since 3.2.0
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*
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* @param array $capabilities Array of capabilities to test or a wp_remote_request() $args array.
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* @param string $url Optional. If given, will check if the URL requires SSL and adds
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* that requirement to the capabilities array.
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*
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* @return bool
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*/
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function wp_http_supports( $capabilities = array(), $url = null ) {
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$http = _wp_http_get_object();
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$capabilities = wp_parse_args( $capabilities );
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$count = count( $capabilities );
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// If we have a numeric $capabilities array, spoof a wp_remote_request() associative $args array
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if ( $count && count( array_filter( array_keys( $capabilities ), 'is_numeric' ) ) == $count ) {
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$capabilities = array_combine( array_values( $capabilities ), array_fill( 0, $count, true ) );
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}
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if ( $url && !isset( $capabilities['ssl'] ) ) {
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$scheme = parse_url( $url, PHP_URL_SCHEME );
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if ( 'https' == $scheme || 'ssl' == $scheme ) {
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$capabilities['ssl'] = true;
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}
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}
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return (bool) $http->_get_first_available_transport( $capabilities );
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}
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/**
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* Get the HTTP Origin of the current request.
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*
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* @since 3.4.0
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*
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* @return string URL of the origin. Empty string if no origin.
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*/
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function get_http_origin() {
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$origin = '';
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if ( ! empty ( $_SERVER[ 'HTTP_ORIGIN' ] ) )
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$origin = $_SERVER[ 'HTTP_ORIGIN' ];
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/**
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* Change the origin of an HTTP request.
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*
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* @since 3.4.0
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*
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* @param string $origin The original origin for the request.
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*/
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return apply_filters( 'http_origin', $origin );
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}
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/**
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* Retrieve list of allowed HTTP origins.
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*
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* @since 3.4.0
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*
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* @return array Array of origin URLs.
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*/
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function get_allowed_http_origins() {
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$admin_origin = parse_url( admin_url() );
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$home_origin = parse_url( home_url() );
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// @todo preserve port?
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$allowed_origins = array_unique( array(
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'http://' . $admin_origin[ 'host' ],
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'https://' . $admin_origin[ 'host' ],
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'http://' . $home_origin[ 'host' ],
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'https://' . $home_origin[ 'host' ],
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) );
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/**
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* Change the origin types allowed for HTTP requests.
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*
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* @since 3.4.0
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*
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* @param array $allowed_origins {
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* Default allowed HTTP origins.
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* @type string Non-secure URL for admin origin.
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* @type string Secure URL for admin origin.
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* @type string Non-secure URL for home origin.
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* @type string Secure URL for home origin.
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* }
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*/
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return apply_filters( 'allowed_http_origins' , $allowed_origins );
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}
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/**
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* Determines if the HTTP origin is an authorized one.
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*
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* @since 3.4.0
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*
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* @param null|string $origin Origin URL. If not provided, the value of get_http_origin() is used.
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* @return string Origin URL if allowed, empty string if not.
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*/
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function is_allowed_http_origin( $origin = null ) {
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$origin_arg = $origin;
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if ( null === $origin )
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$origin = get_http_origin();
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if ( $origin && ! in_array( $origin, get_allowed_http_origins() ) )
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$origin = '';
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/**
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* Change the allowed HTTP origin result.
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*
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* @since 3.4.0
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*
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* @param string $origin Origin URL if allowed, empty string if not.
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* @param string $origin_arg Original origin string passed into is_allowed_http_origin function.
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*/
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return apply_filters( 'allowed_http_origin', $origin, $origin_arg );
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}
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/**
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* Send Access-Control-Allow-Origin and related headers if the current request
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* is from an allowed origin.
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*
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* If the request is an OPTIONS request, the script exits with either access
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* control headers sent, or a 403 response if the origin is not allowed. For
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* other request methods, you will receive a return value.
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*
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* @since 3.4.0
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*
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* @return string|false Returns the origin URL if headers are sent. Returns false
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* if headers are not sent.
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*/
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function send_origin_headers() {
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$origin = get_http_origin();
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if ( is_allowed_http_origin( $origin ) ) {
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@header( 'Access-Control-Allow-Origin: ' . $origin );
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@header( 'Access-Control-Allow-Credentials: true' );
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if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] )
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exit;
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return $origin;
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}
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if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
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status_header( 403 );
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exit;
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}
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return false;
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}
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/**
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* Validate a URL for safe use in the HTTP API.
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*
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* @since 3.5.2
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*
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* @param string $url
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* @return false|string URL or false on failure.
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*/
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function wp_http_validate_url( $url ) {
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$original_url = $url;
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$url = wp_kses_bad_protocol( $url, array( 'http', 'https' ) );
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if ( ! $url || strtolower( $url ) !== strtolower( $original_url ) )
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return false;
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$parsed_url = @parse_url( $url );
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if ( ! $parsed_url || empty( $parsed_url['host'] ) )
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return false;
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if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) )
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return false;
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if ( false !== strpbrk( $parsed_url['host'], ':#?[]' ) )
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return false;
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$parsed_home = @parse_url( get_option( 'home' ) );
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if ( isset( $parsed_home['host'] ) ) {
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$same_host = strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
|
|
} else {
|
|
$same_host = false;
|
|
}
|
|
|
|
if ( ! $same_host ) {
|
|
$host = trim( $parsed_url['host'], '.' );
|
|
if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $host ) ) {
|
|
$ip = $host;
|
|
} else {
|
|
$ip = gethostbyname( $host );
|
|
if ( $ip === $host ) { // Error condition for gethostbyname()
|
|
return false;
|
|
}
|
|
}
|
|
if ( $ip ) {
|
|
$parts = array_map( 'intval', explode( '.', $ip ) );
|
|
if ( 127 === $parts[0] || 10 === $parts[0] || 0 === $parts[0]
|
|
|| ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] )
|
|
|| ( 192 === $parts[0] && 168 === $parts[1] )
|
|
) {
|
|
// If host appears local, reject unless specifically allowed.
|
|
/**
|
|
* Check if HTTP request is external or not.
|
|
*
|
|
* Allows to change and allow external requests for the HTTP request.
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @param bool false Whether HTTP request is external or not.
|
|
* @param string $host IP of the requested host.
|
|
* @param string $url URL of the requested host.
|
|
*/
|
|
if ( ! apply_filters( 'http_request_host_is_external', false, $host, $url ) )
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( empty( $parsed_url['port'] ) )
|
|
return $url;
|
|
|
|
$port = $parsed_url['port'];
|
|
if ( 80 === $port || 443 === $port || 8080 === $port )
|
|
return $url;
|
|
|
|
if ( $parsed_home && $same_host && isset( $parsed_home['port'] ) && $parsed_home['port'] === $port )
|
|
return $url;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Whitelists allowed redirect hosts for safe HTTP requests as well.
|
|
*
|
|
* Attached to the http_request_host_is_external filter.
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @param bool $is_external
|
|
* @param string $host
|
|
* @return bool
|
|
*/
|
|
function allowed_http_request_hosts( $is_external, $host ) {
|
|
if ( ! $is_external && wp_validate_redirect( 'http://' . $host ) )
|
|
$is_external = true;
|
|
return $is_external;
|
|
}
|
|
|
|
/**
|
|
* Whitelists any domain in a multisite installation for safe HTTP requests.
|
|
*
|
|
* Attached to the http_request_host_is_external filter.
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
* @staticvar array $queried
|
|
*
|
|
* @param bool $is_external
|
|
* @param string $host
|
|
* @return bool
|
|
*/
|
|
function ms_allowed_http_request_hosts( $is_external, $host ) {
|
|
global $wpdb;
|
|
static $queried = array();
|
|
if ( $is_external )
|
|
return $is_external;
|
|
if ( $host === get_current_site()->domain )
|
|
return true;
|
|
if ( isset( $queried[ $host ] ) )
|
|
return $queried[ $host ];
|
|
$queried[ $host ] = (bool) $wpdb->get_var( $wpdb->prepare( "SELECT domain FROM $wpdb->blogs WHERE domain = %s LIMIT 1", $host ) );
|
|
return $queried[ $host ];
|
|
}
|
|
|
|
/**
|
|
* A wrapper for PHP's parse_url() function that handles edgecases in < PHP 5.4.7
|
|
*
|
|
* PHP 5.4.7 expanded parse_url()'s ability to handle non-absolute url's, including
|
|
* schemeless and relative url's with :// in the path, this works around those
|
|
* limitations providing a standard output on PHP 5.2~5.4+.
|
|
*
|
|
* Error suppression is used as prior to PHP 5.3.3, an E_WARNING would be generated
|
|
* when URL parsing failed.
|
|
*
|
|
* @since 4.4.0
|
|
*
|
|
* @param string $url The URL to parse.
|
|
* @return bool|array False on failure; Array of URL components on success;
|
|
* See parse_url()'s return values.
|
|
*/
|
|
function wp_parse_url( $url ) {
|
|
$parts = @parse_url( $url );
|
|
if ( ! $parts ) {
|
|
// < PHP 5.4.7 compat, trouble with relative paths including a scheme break in the path
|
|
if ( '/' == $url[0] && false !== strpos( $url, '://' ) ) {
|
|
// Since we know it's a relative path, prefix with a scheme/host placeholder and try again
|
|
if ( ! $parts = @parse_url( 'placeholder://placeholder' . $url ) ) {
|
|
return $parts;
|
|
}
|
|
// Remove the placeholder values
|
|
unset( $parts['scheme'], $parts['host'] );
|
|
} else {
|
|
return $parts;
|
|
}
|
|
}
|
|
|
|
// < PHP 5.4.7 compat, doesn't detect schemeless URL's host field
|
|
if ( '//' == substr( $url, 0, 2 ) && ! isset( $parts['host'] ) ) {
|
|
$path_parts = explode( '/', substr( $parts['path'], 2 ), 2 );
|
|
$parts['host'] = $path_parts[0];
|
|
if ( isset( $path_parts[1] ) ) {
|
|
$parts['path'] = '/' . $path_parts[1];
|
|
} else {
|
|
unset( $parts['path'] );
|
|
}
|
|
}
|
|
|
|
return $parts;
|
|
}
|