angelovcom.net

http.php (22385B)

---

 <?php
 /**
  * Core HTTP Request API
  *
  * Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
  * decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
  *
  * @package WordPress
  * @subpackage HTTP
  */
 
 /**
  * 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 = null;
 
 	if ( is_null( $http ) ) {
 		$http = new WP_Http();
 	}
 	return $http;
 }
 
 /**
  * Retrieve the raw response from a safe HTTP request.
  *
  * This function is ideal when the HTTP request is being made to an arbitrary
  * URL. The URL is validated to avoid redirection and request forgery attacks.
  *
  * @since 3.6.0
  *
  * @see wp_remote_request() For more information on the response array format.
  * @see WP_Http::request() For default arguments information.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error The response or WP_Error on failure.
  */
 function wp_safe_remote_request( $url, $args = array() ) {
 	$args['reject_unsafe_urls'] = true;
 	$http                       = _wp_http_get_object();
 	return $http->request( $url, $args );
 }
 
 /**
  * Retrieve the raw response from a safe HTTP request using the GET method.
  *
  * This function is ideal when the HTTP request is being made to an arbitrary
  * URL. The URL is validated to avoid redirection and request forgery attacks.
  *
  * @since 3.6.0
  *
  * @see wp_remote_request() For more information on the response array format.
  * @see WP_Http::request() For default arguments information.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error The response or WP_Error on failure.
  */
 function wp_safe_remote_get( $url, $args = array() ) {
 	$args['reject_unsafe_urls'] = true;
 	$http                       = _wp_http_get_object();
 	return $http->get( $url, $args );
 }
 
 /**
  * Retrieve the raw response from a safe HTTP request using the POST method.
  *
  * This function is ideal when the HTTP request is being made to an arbitrary
  * URL. The URL is validated to avoid redirection and request forgery attacks.
  *
  * @since 3.6.0
  *
  * @see wp_remote_request() For more information on the response array format.
  * @see WP_Http::request() For default arguments information.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error The response or WP_Error on failure.
  */
 function wp_safe_remote_post( $url, $args = array() ) {
 	$args['reject_unsafe_urls'] = true;
 	$http                       = _wp_http_get_object();
 	return $http->post( $url, $args );
 }
 
 /**
  * Retrieve the raw response from a safe HTTP request using the HEAD method.
  *
  * This function is ideal when the HTTP request is being made to an arbitrary
  * URL. The URL is validated to avoid redirection and request forgery attacks.
  *
  * @since 3.6.0
  *
  * @see wp_remote_request() For more information on the response array format.
  * @see WP_Http::request() For default arguments information.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error The response or WP_Error on failure.
  */
 function wp_safe_remote_head( $url, $args = array() ) {
 	$args['reject_unsafe_urls'] = true;
 	$http                       = _wp_http_get_object();
 	return $http->head( $url, $args );
 }
 
 /**
  * Performs an HTTP request and returns its response.
  *
  * There are other API functions available which abstract away the HTTP method:
  *
  *  - Default 'GET'  for wp_remote_get()
  *  - Default 'POST' for wp_remote_post()
  *  - Default 'HEAD' for wp_remote_head()
  *
  * @since 2.7.0
  *
  * @see WP_Http::request() For information on default arguments.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error {
  *     The response array or a WP_Error on failure.
  *
  *     @type string[]                       $headers       Array of response headers keyed by their name.
  *     @type string                         $body          Response body.
  *     @type array                          $response      {
  *         Data about the HTTP response.
  *
  *         @type int|false    $code    HTTP response code.
  *         @type string|false $message HTTP response message.
  *     }
  *     @type WP_HTTP_Cookie[]               $cookies       Array of response cookies.
  *     @type WP_HTTP_Requests_Response|null $http_response Raw HTTP response object.
  * }
  */
 function wp_remote_request( $url, $args = array() ) {
 	$http = _wp_http_get_object();
 	return $http->request( $url, $args );
 }
 
 /**
  * Performs an HTTP request using the GET method and returns its response.
  *
  * @since 2.7.0
  *
  * @see wp_remote_request() For more information on the response array format.
  * @see WP_Http::request() For default arguments information.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error The response or WP_Error on failure.
  */
 function wp_remote_get( $url, $args = array() ) {
 	$http = _wp_http_get_object();
 	return $http->get( $url, $args );
 }
 
 /**
  * Performs an HTTP request using the POST method and returns its response.
  *
  * @since 2.7.0
  *
  * @see wp_remote_request() For more information on the response array format.
  * @see WP_Http::request() For default arguments information.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error The response or WP_Error on failure.
  */
 function wp_remote_post( $url, $args = array() ) {
 	$http = _wp_http_get_object();
 	return $http->post( $url, $args );
 }
 
 /**
  * Performs an HTTP request using the HEAD method and returns its response.
  *
  * @since 2.7.0
  *
  * @see wp_remote_request() For more information on the response array format.
  * @see WP_Http::request() For default arguments information.
  *
  * @param string $url  URL to retrieve.
  * @param array  $args Optional. Request arguments. Default empty array.
  * @return array|WP_Error The response or WP_Error on failure.
  */
 function wp_remote_head( $url, $args = array() ) {
 	$http = _wp_http_get_object();
 	return $http->head( $url, $args );
 }
 
 /**
  * Retrieve only the headers from the raw response.
  *
  * @since 2.7.0
  * @since 4.6.0 Return value changed from an array to an Requests_Utility_CaseInsensitiveDictionary instance.
  *
  * @see \Requests_Utility_CaseInsensitiveDictionary
  *
  * @param array|WP_Error $response HTTP response.
  * @return array|\Requests_Utility_CaseInsensitiveDictionary 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'] ) ) {
 		return array();
 	}
 
 	return $response['headers'];
 }
 
 /**
  * Retrieve a single header by name from the raw response.
  *
  * @since 2.7.0
  *
  * @param array|WP_Error $response HTTP 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'] ) ) {
 		return '';
 	}
 
 	if ( isset( $response['headers'][ $header ] ) ) {
 		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|WP_Error $response HTTP response.
  * @return int|string The response code as an integer. 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|WP_Error $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|WP_Error $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'];
 }
 
 /**
  * Retrieve only the cookies from the raw response.
  *
  * @since 4.4.0
  *
  * @param array|WP_Error $response HTTP response.
  * @return WP_Http_Cookie[] An array of `WP_Http_Cookie` objects from the response. Empty array if there are none, or the response is a WP_Error.
  */
 function wp_remote_retrieve_cookies( $response ) {
 	if ( is_wp_error( $response ) || empty( $response['cookies'] ) ) {
 		return array();
 	}
 
 	return $response['cookies'];
 }
 
 /**
  * Retrieve a single cookie by name from the raw response.
  *
  * @since 4.4.0
  *
  * @param array|WP_Error $response HTTP response.
  * @param string         $name     The name of the cookie to retrieve.
  * @return WP_Http_Cookie|string The `WP_Http_Cookie` object. Empty string if the cookie isn't present in the response.
  */
 function wp_remote_retrieve_cookie( $response, $name ) {
 	$cookies = wp_remote_retrieve_cookies( $response );
 
 	if ( empty( $cookies ) ) {
 		return '';
 	}
 
 	foreach ( $cookies as $cookie ) {
 		if ( $cookie->name === $name ) {
 			return $cookie;
 		}
 	}
 
 	return '';
 }
 
 /**
  * Retrieve a single cookie's value by name from the raw response.
  *
  * @since 4.4.0
  *
  * @param array|WP_Error $response HTTP response.
  * @param string         $name     The name of the cookie to retrieve.
  * @return string The value of the cookie. Empty string if the cookie isn't present in the response.
  */
 function wp_remote_retrieve_cookie_value( $response, $name ) {
 	$cookie = wp_remote_retrieve_cookie( $response, $name );
 
 	if ( ! is_a( $cookie, 'WP_Http_Cookie' ) ) {
 		return '';
 	}
 
 	return $cookie->value;
 }
 
 /**
  * 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 ) {
 	$http = _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) $http->_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'];
 	}
 
 	/**
 	 * Change the origin of an HTTP request.
 	 *
 	 * @since 3.4.0
 	 *
 	 * @param string $origin The original origin for the request.
 	 */
 	return apply_filters( 'http_origin', $origin );
 }
 
 /**
  * Retrieve list of allowed HTTP origins.
  *
  * @since 3.4.0
  *
  * @return string[] 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'],
 		)
 	);
 
 	/**
 	 * Change the origin types allowed for HTTP requests.
 	 *
 	 * @since 3.4.0
 	 *
 	 * @param string[] $allowed_origins {
 	 *     Array of default allowed HTTP origins.
 	 *
 	 *     @type string $0 Non-secure URL for admin origin.
 	 *     @type string $1 Secure URL for admin origin.
 	 *     @type string $2 Non-secure URL for home origin.
 	 *     @type string $3 Secure URL for home origin.
 	 * }
 	 */
 	return apply_filters( 'allowed_http_origins', $allowed_origins );
 }
 
 /**
  * Determines if the HTTP origin is an authorized one.
  *
  * @since 3.4.0
  *
  * @param null|string $origin Origin URL. If not provided, the value of get_http_origin() is used.
  * @return string Origin URL if allowed, empty string if not.
  */
 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(), true ) ) {
 		$origin = '';
 	}
 
 	/**
 	 * Change the allowed HTTP origin result.
 	 *
 	 * @since 3.4.0
 	 *
 	 * @param string $origin     Origin URL if allowed, empty string if not.
 	 * @param string $origin_arg Original origin string passed into is_allowed_http_origin function.
 	 */
 	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.
  *
  * If the request is an OPTIONS request, the script exits with either access
  * control headers sent, or a 403 response if the origin is not allowed. For
  * other request methods, you will receive a return value.
  *
  * @since 3.4.0
  *
  * @return string|false 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 ) ) {
 		header( 'Access-Control-Allow-Origin: ' . $origin );
 		header( 'Access-Control-Allow-Credentials: true' );
 		if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
 			exit;
 		}
 		return $origin;
 	}
 
 	if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
 		status_header( 403 );
 		exit;
 	}
 
 	return false;
 }
 
 /**
  * Validate a URL for safe use in the HTTP API.
  *
  * @since 3.5.2
  *
  * @param string $url Request URL.
  * @return string|false URL or false on failure.
  */
 function wp_http_validate_url( $url ) {
 	$original_url = $url;
 	$url          = wp_kses_bad_protocol( $url, array( 'http', 'https' ) );
 	if ( ! $url || strtolower( $url ) !== strtolower( $original_url ) ) {
 		return false;
 	}
 
 	$parsed_url = parse_url( $url );
 	if ( ! $parsed_url || empty( $parsed_url['host'] ) ) {
 		return false;
 	}
 
 	if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) ) {
 		return false;
 	}
 
 	if ( false !== strpbrk( $parsed_url['host'], ':#?[]' ) ) {
 		return false;
 	}
 
 	$parsed_home = parse_url( get_option( 'home' ) );
 
 	if ( isset( $parsed_home['host'] ) ) {
 		$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   $external Whether HTTP request is external or not.
 				 * @param string $host     Host name of the requested URL.
 				 * @param string $url      Requested URL.
 				 */
 				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;
 }
 
 /**
  * Mark allowed redirect hosts safe for HTTP requests as well.
  *
  * Attached to the {@see '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;
 }
 
 /**
  * Adds any domain in a multisite installation for safe HTTP requests to the
  * allowed list.
  *
  * Attached to the {@see 'http_request_host_is_external'} filter.
  *
  * @since 3.6.0
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @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 ( get_network()->domain === $host ) {
 		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 consistency in the return
  * values across PHP versions.
  *
  * 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 function works around
  * those limitations providing a standard output on PHP 5.2~5.4+.
  *
  * Secondly, across various PHP versions, schemeless URLs starting containing a ":"
  * in the query are being handled inconsistently. This function works around those
  * differences as well.
  *
  * @since 4.4.0
  * @since 4.7.0 The `$component` parameter was added for parity with PHP's `parse_url()`.
  *
  * @link https://www.php.net/manual/en/function.parse-url.php
  *
  * @param string $url       The URL to parse.
  * @param int    $component The specific component to retrieve. Use one of the PHP
  *                          predefined constants to specify which one.
  *                          Defaults to -1 (= return all parts as an array).
  * @return mixed False on parse failure; Array of URL components on success;
  *               When a specific component has been requested: null if the component
  *               doesn't exist in the given URL; a string or - in the case of
  *               PHP_URL_PORT - integer when it does. See parse_url()'s return values.
  */
 function wp_parse_url( $url, $component = -1 ) {
 	$to_unset = array();
 	$url      = (string) $url;
 
 	if ( '//' === substr( $url, 0, 2 ) ) {
 		$to_unset[] = 'scheme';
 		$url        = 'placeholder:' . $url;
 	} elseif ( '/' === substr( $url, 0, 1 ) ) {
 		$to_unset[] = 'scheme';
 		$to_unset[] = 'host';
 		$url        = 'placeholder://placeholder' . $url;
 	}
 
 	$parts = parse_url( $url );
 
 	if ( false === $parts ) {
 		// Parsing failure.
 		return $parts;
 	}
 
 	// Remove the placeholder values.
 	foreach ( $to_unset as $key ) {
 		unset( $parts[ $key ] );
 	}
 
 	return _get_component_from_parsed_url_array( $parts, $component );
 }
 
 /**
  * Retrieve a specific component from a parsed URL array.
  *
  * @internal
  *
  * @since 4.7.0
  * @access private
  *
  * @link https://www.php.net/manual/en/function.parse-url.php
  *
  * @param array|false $url_parts The parsed URL. Can be false if the URL failed to parse.
  * @param int         $component The specific component to retrieve. Use one of the PHP
  *                               predefined constants to specify which one.
  *                               Defaults to -1 (= return all parts as an array).
  * @return mixed False on parse failure; Array of URL components on success;
  *               When a specific component has been requested: null if the component
  *               doesn't exist in the given URL; a string or - in the case of
  *               PHP_URL_PORT - integer when it does. See parse_url()'s return values.
  */
 function _get_component_from_parsed_url_array( $url_parts, $component = -1 ) {
 	if ( -1 === $component ) {
 		return $url_parts;
 	}
 
 	$key = _wp_translate_php_url_constant_to_key( $component );
 	if ( false !== $key && is_array( $url_parts ) && isset( $url_parts[ $key ] ) ) {
 		return $url_parts[ $key ];
 	} else {
 		return null;
 	}
 }
 
 /**
  * Translate a PHP_URL_* constant to the named array keys PHP uses.
  *
  * @internal
  *
  * @since 4.7.0
  * @access private
  *
  * @link https://www.php.net/manual/en/url.constants.php
  *
  * @param int $constant PHP_URL_* constant.
  * @return string|false The named key or false.
  */
 function _wp_translate_php_url_constant_to_key( $constant ) {
 	$translation = array(
 		PHP_URL_SCHEME   => 'scheme',
 		PHP_URL_HOST     => 'host',
 		PHP_URL_PORT     => 'port',
 		PHP_URL_USER     => 'user',
 		PHP_URL_PASS     => 'pass',
 		PHP_URL_PATH     => 'path',
 		PHP_URL_QUERY    => 'query',
 		PHP_URL_FRAGMENT => 'fragment',
 	);
 
 	if ( isset( $translation[ $constant ] ) ) {
 		return $translation[ $constant ];
 	} else {
 		return false;
 	}
 }