<?php /** * Simple and uniform HTTP request API. * * Will eventually replace and standardize the WordPress HTTP requests made. * * @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal * * @package WordPress * @subpackage HTTP * @since 2.7.0 */ /** * Returns the initialized WP_Http Object * * @since 2.7.0 * @access private * * @return WP_Http HTTP Transport object. */ function &_wp_http_get_object() { static $http; if ( is_null($http) ) $http = new WP_Http(); return $http; } /** * Retrieve the raw response from the HTTP request. * * The array structure is a little complex. * * <code> * $res = array( 'headers' => array(), 'response' => array('code' => int, 'message' => string) ); * </code> * * All of the headers in $res['headers'] are with the name as the key and the * value as the value. So to get the User-Agent, you would do the following. * * <code> * $user_agent = $res['headers']['user-agent']; * </code> * * The body is the raw response content and can be retrieved from $res['body']. * * This function is called first to make the request and there are other API * functions to abstract out the above convoluted setup. * * @since 2.7.0 * * @param string $url Site URL to retrieve. * @param array $args Optional. Override the defaults. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_request($url, $args = array()) { $objFetchSite = _wp_http_get_object(); return $objFetchSite->request($url, $args); } /** * Retrieve the raw response from the HTTP request using the GET method. * * @see wp_remote_request() For more information on the response array format. * * @since 2.7.0 * * @param string $url Site URL to retrieve. * @param array $args Optional. Override the defaults. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_get($url, $args = array()) { $objFetchSite = _wp_http_get_object(); return $objFetchSite->get($url, $args); } /** * Retrieve the raw response from the HTTP request using the POST method. * * @see wp_remote_request() For more information on the response array format. * * @since 2.7.0 * * @param string $url Site URL to retrieve. * @param array $args Optional. Override the defaults. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_post($url, $args = array()) { $objFetchSite = _wp_http_get_object(); return $objFetchSite->post($url, $args); } /** * Retrieve the raw response from the HTTP request using the HEAD method. * * @see wp_remote_request() For more information on the response array format. * * @since 2.7.0 * * @param string $url Site URL to retrieve. * @param array $args Optional. Override the defaults. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_head($url, $args = array()) { $objFetchSite = _wp_http_get_object(); return $objFetchSite->head($url, $args); } /** * Retrieve only the headers from the raw response. * * @since 2.7.0 * * @param array $response HTTP response. * @return array The headers of the response. Empty array if incorrect parameter given. */ function wp_remote_retrieve_headers(&$response) { if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers'])) return array(); return $response['headers']; } /** * Retrieve a single header by name from the raw response. * * @since 2.7.0 * * @param array $response * @param string $header Header name to retrieve value from. * @return string The header value. Empty string on if incorrect parameter given, or if the header doesn't exist. */ function wp_remote_retrieve_header(&$response, $header) { if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers'])) return ''; if ( array_key_exists($header, $response['headers']) ) return $response['headers'][$header]; return ''; } /** * Retrieve only the response code from the raw response. * * Will return an empty array if incorrect parameter value is given. * * @since 2.7.0 * * @param array $response HTTP response. * @return string the response code. Empty string on incorrect parameter given. */ function wp_remote_retrieve_response_code(&$response) { if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response'])) return ''; return $response['response']['code']; } /** * Retrieve only the response message from the raw response. * * Will return an empty array if incorrect parameter value is given. * * @since 2.7.0 * * @param array $response HTTP response. * @return string The response message. Empty string on incorrect parameter given. */ function wp_remote_retrieve_response_message(&$response) { if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response'])) return ''; return $response['response']['message']; } /** * Retrieve only the body from the raw response. * * @since 2.7.0 * * @param array $response HTTP response. * @return string The body of the response. Empty string if no body or incorrect parameter given. */ function wp_remote_retrieve_body(&$response) { if ( is_wp_error($response) || ! isset($response['body']) ) return ''; return $response['body']; } /** * Determines if there is an HTTP Transport that can process this request. * * @since 3.2.0 * * @param array $capabilities Array of capabilities to test or a wp_remote_request() $args array. * @param string $url Optional. If given, will check if the URL requires SSL and adds that requirement to the capabilities array. * * @return bool */ function wp_http_supports( $capabilities = array(), $url = null ) { $objFetchSite = _wp_http_get_object(); $capabilities = wp_parse_args( $capabilities ); $count = count( $capabilities ); // If we have a numeric $capabilities array, spoof a wp_remote_request() associative $args array if ( $count && count( array_filter( array_keys( $capabilities ), 'is_numeric' ) ) == $count ) { $capabilities = array_combine( array_values( $capabilities ), array_fill( 0, $count, true ) ); } if ( $url && !isset( $capabilities['ssl'] ) ) { $scheme = parse_url( $url, PHP_URL_SCHEME ); if ( 'https' == $scheme || 'ssl' == $scheme ) { $capabilities['ssl'] = true; } } return (bool) $objFetchSite->_get_first_available_transport( $capabilities ); } /** * Get the HTTP Origin of the current request. * * @since 3.4.0 * * @return string URL of the origin. Empty string if no origin. */ function get_http_origin() { $origin = ''; if ( ! empty ( $_SERVER[ 'HTTP_ORIGIN' ] ) ) $origin = $_SERVER[ 'HTTP_ORIGIN' ]; return apply_filters( 'http_origin', $origin ); } /** * Retrieve list of allowed http origins. * * @since 3.4.0 * * @return array Array of origin URLs. */ function get_allowed_http_origins() { $admin_origin = parse_url( admin_url() ); $home_origin = parse_url( home_url() ); // @todo preserve port? $allowed_origins = array_unique( array( 'http://' . $admin_origin[ 'host' ], 'https://' . $admin_origin[ 'host' ], 'http://' . $home_origin[ 'host' ], 'https://' . $home_origin[ 'host' ], ) ); return apply_filters( 'allowed_http_origins' , $allowed_origins ); } /** * Determines if the http origin is an authorized one. * * @since 3.4.0 * * @param string Origin URL. If not provided, the value of get_http_origin() is used. * @return bool True if the origin is allowed. False otherwise. */ function is_allowed_http_origin( $origin = null ) { $origin_arg = $origin; if ( null === $origin ) $origin = get_http_origin(); if ( $origin && ! in_array( $origin, get_allowed_http_origins() ) ) $origin = ''; return apply_filters( 'allowed_http_origin', $origin, $origin_arg ); } /** * Send Access-Control-Allow-Origin and related headers if the current request * is from an allowed origin. * * @since 3.4.0 * * @return bool|string Returns the origin URL if headers are sent. Returns false * if headers are not sent. */ function send_origin_headers() { $origin = get_http_origin(); if ( ! is_allowed_http_origin( $origin ) ) return false; @header( 'Access-Control-Allow-Origin: ' . $origin ); @header( 'Access-Control-Allow-Credentials: true' ); return $origin; }