381 lines
12 KiB
PHP
381 lines
12 KiB
PHP
<?php
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/**
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* Geolocation class
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*
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* Handles geolocation and updating the geolocation database.
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*
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* This product includes GeoLite data created by MaxMind, available from http://www.maxmind.com.
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*
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* @author WooThemes
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* @category Admin
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* @package WooCommerce/Classes
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* @version 2.4.0
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*/
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* WC_Geolocation Class.
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*/
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class WC_Geolocation {
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/** URL to the geolocation database we're using */
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const GEOLITE_DB = 'http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz';
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const GEOLITE_IPV6_DB = 'http://geolite.maxmind.com/download/geoip/database/GeoIPv6.dat.gz';
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/** @var array API endpoints for looking up user IP address */
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private static $ip_lookup_apis = array(
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'icanhazip' => 'http://icanhazip.com',
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'ipify' => 'http://api.ipify.org/',
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'ipecho' => 'http://ipecho.net/plain',
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'ident' => 'http://ident.me',
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'whatismyipaddress' => 'http://bot.whatismyipaddress.com',
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'ip.appspot' => 'http://ip.appspot.com',
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);
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/** @var array API endpoints for geolocating an IP address */
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private static $geoip_apis = array(
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'freegeoip' => 'https://freegeoip.net/json/%s',
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'ipinfo.io' => 'https://ipinfo.io/%s/json',
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'ip-api.com' => 'http://ip-api.com/json/%s',
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);
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/**
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* Hook in tabs.
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*/
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public static function init() {
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// Only download the database from MaxMind if the geolocation function is enabled, or a plugin specifically requests it
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if ( 'geolocation' === get_option( 'woocommerce_default_customer_address' ) || apply_filters( 'woocommerce_geolocation_update_database_periodically', false ) ) {
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add_action( 'woocommerce_geoip_updater', array( __CLASS__, 'update_database' ) );
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}
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add_filter( 'pre_update_option_woocommerce_default_customer_address', array( __CLASS__, 'maybe_update_database' ), 10, 2 );
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}
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/**
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* Maybe trigger a DB update for the first time.
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* @param string $new_value
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* @param string $old_value
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* @return string
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*/
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public static function maybe_update_database( $new_value, $old_value ) {
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if ( $new_value !== $old_value && 'geolocation' === $new_value ) {
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self::update_database();
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}
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return $new_value;
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}
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/**
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* Check if is a valid IP address.
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*
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* @since 3.0.6
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* @param string $ip_address IP address.
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* @return string|bool The valid IP address, otherwise false.
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*/
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private static function is_ip_address( $ip_address ) {
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// WP 4.7+ only.
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if ( function_exists( 'rest_is_ip_address' ) ) {
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return rest_is_ip_address( $ip_address );
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}
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// Support for WordPress 4.4 to 4.6.
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if ( ! class_exists( 'Requests_IPv6', false ) ) {
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include_once( dirname( __FILE__ ) . '/vendor/class-requests-ipv6.php' );
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}
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$ipv4_pattern = '/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/';
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if ( ! preg_match( $ipv4_pattern, $ip_address ) && ! Requests_IPv6::check_ipv6( $ip_address ) ) {
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return false;
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}
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return $ip_address;
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}
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/**
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* Get current user IP Address.
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* @return string
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*/
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public static function get_ip_address() {
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if ( isset( $_SERVER['HTTP_X_REAL_IP'] ) ) {
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return $_SERVER['HTTP_X_REAL_IP'];
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} elseif ( isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
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// Proxy servers can send through this header like this: X-Forwarded-For: client1, proxy1, proxy2
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// Make sure we always only send through the first IP in the list which should always be the client IP.
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return (string) self::is_ip_address( trim( current( explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) ) );
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} elseif ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
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return $_SERVER['REMOTE_ADDR'];
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}
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return '';
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}
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/**
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* Get user IP Address using an external service.
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* This is used mainly as a fallback for users on localhost where
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* get_ip_address() will be a local IP and non-geolocatable.
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* @return string
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*/
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public static function get_external_ip_address() {
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$external_ip_address = '0.0.0.0';
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if ( '' !== self::get_ip_address() ) {
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$transient_name = 'external_ip_address_' . self::get_ip_address();
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$external_ip_address = get_transient( $transient_name );
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}
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if ( false === $external_ip_address ) {
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$external_ip_address = '0.0.0.0';
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$ip_lookup_services = apply_filters( 'woocommerce_geolocation_ip_lookup_apis', self::$ip_lookup_apis );
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$ip_lookup_services_keys = array_keys( $ip_lookup_services );
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shuffle( $ip_lookup_services_keys );
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foreach ( $ip_lookup_services_keys as $service_name ) {
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$service_endpoint = $ip_lookup_services[ $service_name ];
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$response = wp_safe_remote_get( $service_endpoint, array( 'timeout' => 2 ) );
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if ( ! is_wp_error( $response ) && $response['body'] ) {
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$external_ip_address = apply_filters( 'woocommerce_geolocation_ip_lookup_api_response', wc_clean( $response['body'] ), $service_name );
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break;
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}
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}
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set_transient( $transient_name, $external_ip_address, WEEK_IN_SECONDS );
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}
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return $external_ip_address;
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}
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/**
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* Geolocate an IP address.
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* @param string $ip_address
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* @param bool $fallback If true, fallbacks to alternative IP detection (can be slower).
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* @param bool $api_fallback If true, uses geolocation APIs if the database file doesn't exist (can be slower).
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* @return array
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*/
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public static function geolocate_ip( $ip_address = '', $fallback = true, $api_fallback = true ) {
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// Filter to allow custom geolocation of the IP address.
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$country_code = apply_filters( 'woocommerce_geolocate_ip', false, $ip_address, $fallback, $api_fallback );
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if ( false === $country_code ) {
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// If GEOIP is enabled in CloudFlare, we can use that (Settings -> CloudFlare Settings -> Settings Overview)
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if ( ! empty( $_SERVER['HTTP_CF_IPCOUNTRY'] ) ) {
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$country_code = sanitize_text_field( strtoupper( $_SERVER['HTTP_CF_IPCOUNTRY'] ) );
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// WP.com VIP has a variable available.
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} elseif ( ! empty( $_SERVER['GEOIP_COUNTRY_CODE'] ) ) {
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$country_code = sanitize_text_field( strtoupper( $_SERVER['GEOIP_COUNTRY_CODE'] ) );
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// VIP Go has a variable available also.
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} elseif ( ! empty( $_SERVER['HTTP_X_COUNTRY_CODE'] ) ) {
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$country_code = sanitize_text_field( strtoupper( $_SERVER['HTTP_X_COUNTRY_CODE'] ) );
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} else {
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$ip_address = $ip_address ? $ip_address : self::get_ip_address();
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if ( self::is_IPv6( $ip_address ) ) {
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$database = self::get_local_database_path( 'v6' );
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} else {
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$database = self::get_local_database_path();
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}
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if ( file_exists( $database ) ) {
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$country_code = self::geolocate_via_db( $ip_address );
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} elseif ( $api_fallback ) {
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$country_code = self::geolocate_via_api( $ip_address );
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} else {
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$country_code = '';
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}
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if ( ! $country_code && $fallback ) {
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// May be a local environment - find external IP
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return self::geolocate_ip( self::get_external_ip_address(), false, $api_fallback );
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}
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}
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}
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return array(
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'country' => $country_code,
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'state' => '',
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);
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}
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/**
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* Path to our local db.
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* @param string $version
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* @return string
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*/
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public static function get_local_database_path( $version = 'v4' ) {
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$version = ( 'v4' == $version ) ? '' : 'v6';
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$upload_dir = wp_upload_dir();
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return apply_filters( 'woocommerce_geolocation_local_database_path', $upload_dir['basedir'] . '/GeoIP' . $version . '.dat', $version );
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}
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/**
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* Update geoip database. Adapted from https://wordpress.org/plugins/geoip-detect/.
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*/
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public static function update_database() {
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$logger = wc_get_logger();
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if ( ! is_callable( 'gzopen' ) ) {
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$logger->notice( 'Server does not support gzopen', array( 'source' => 'geolocation' ) );
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return;
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}
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require_once( ABSPATH . 'wp-admin/includes/file.php' );
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$tmp_databases = array(
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'v4' => download_url( self::GEOLITE_DB ),
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'v6' => download_url( self::GEOLITE_IPV6_DB ),
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);
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foreach ( $tmp_databases as $tmp_database_version => $tmp_database_path ) {
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if ( ! is_wp_error( $tmp_database_path ) ) {
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$gzhandle = @gzopen( $tmp_database_path, 'r' );
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$handle = @fopen( self::get_local_database_path( $tmp_database_version ), 'w' );
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if ( $gzhandle && $handle ) {
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while ( $string = gzread( $gzhandle, 4096 ) ) {
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fwrite( $handle, $string, strlen( $string ) );
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}
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gzclose( $gzhandle );
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$s_array = fstat( $handle );
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fclose( $handle );
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if ( ! isset( $s_array['size'] ) || 0 === $s_array['size'] ) {
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$logger->notice( 'Empty database file, deleting local copy.', array( 'source' => 'geolocation' ) );
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// Delete empty DB, we do not want to keep empty files around.
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@unlink( self::get_local_database_path( $tmp_database_version ) );
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// Reschedule download of DB.
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wp_clear_scheduled_hook( 'woocommerce_geoip_updater' );
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wp_schedule_event( strtotime( 'first tuesday of next month' ), 'monthly', 'woocommerce_geoip_updater' );
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}
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} else {
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$logger->notice( 'Unable to open database file', array( 'source' => 'geolocation' ) );
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}
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@unlink( $tmp_database_path );
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} else {
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$logger->notice(
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'Unable to download GeoIP Database: ' . $tmp_database_path->get_error_message(),
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array( 'source' => 'geolocation' )
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);
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}
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}
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}
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/**
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* Use MAXMIND GeoLite database to geolocation the user.
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* @param string $ip_address
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* @return string
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*/
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private static function geolocate_via_db( $ip_address ) {
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if ( ! class_exists( 'WC_Geo_IP', false ) ) {
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include_once( WC_ABSPATH . 'includes/class-wc-geo-ip.php' );
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}
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$gi = new WC_Geo_IP();
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if ( self::is_IPv6( $ip_address ) ) {
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$database = self::get_local_database_path( 'v6' );
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if ( ! self::get_file_size( $database ) ) {
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return false;
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}
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$gi->geoip_open( $database, 0 );
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$country_code = $gi->geoip_country_code_by_addr_v6( $ip_address );
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} else {
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$database = self::get_local_database_path();
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if ( ! self::get_file_size( $database ) ) {
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return false;
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}
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$gi->geoip_open( $database, 0 );
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$country_code = $gi->geoip_country_code_by_addr( $ip_address );
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}
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$gi->geoip_close();
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return sanitize_text_field( strtoupper( $country_code ) );
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}
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/**
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* Check file size
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* Check the file size, if empty file also delete it.
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*
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* @param string $filename Name of the file to check.
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* @return bool|int
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*/
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private static function get_file_size( $filename ) {
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$handle = @fopen( $filename, 'r' );
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$s_array = fstat( $handle );
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@fclose( $handle );
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if ( ! isset( $s_array['size'] ) || 0 === $s_array['size'] ) {
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$logger = wc_get_logger();
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$logger->notice( 'Empty database file, deleting local copy.', array( 'source' => 'geolocation' ) );
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// Delete the file as we do not want to keep empty files around.
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@unlink( $filename );
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return false;
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}
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return $s_array['size'];
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}
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/**
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* Use APIs to Geolocate the user.
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* @param string $ip_address
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* @return string|bool
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*/
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private static function geolocate_via_api( $ip_address ) {
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$country_code = get_transient( 'geoip_' . $ip_address );
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if ( false === $country_code ) {
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$geoip_services = apply_filters( 'woocommerce_geolocation_geoip_apis', self::$geoip_apis );
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$geoip_services_keys = array_keys( $geoip_services );
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shuffle( $geoip_services_keys );
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foreach ( $geoip_services_keys as $service_name ) {
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$service_endpoint = $geoip_services[ $service_name ];
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$response = wp_safe_remote_get( sprintf( $service_endpoint, $ip_address ), array( 'timeout' => 2 ) );
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if ( ! is_wp_error( $response ) && $response['body'] ) {
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switch ( $service_name ) {
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case 'ipinfo.io' :
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$data = json_decode( $response['body'] );
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$country_code = isset( $data->country ) ? $data->country : '';
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break;
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case 'ip-api.com' :
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$data = json_decode( $response['body'] );
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$country_code = isset( $data->countryCode ) ? $data->countryCode : '';
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break;
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case 'freegeoip' :
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$data = json_decode( $response['body'] );
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$country_code = isset( $data->country_code ) ? $data->country_code : '';
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break;
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default :
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$country_code = apply_filters( 'woocommerce_geolocation_geoip_response_' . $service_name, '', $response['body'] );
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break;
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}
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$country_code = sanitize_text_field( strtoupper( $country_code ) );
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if ( $country_code ) {
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break;
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}
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}
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}
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set_transient( 'geoip_' . $ip_address, $country_code, WEEK_IN_SECONDS );
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}
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return $country_code;
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}
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/**
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* Test if is IPv6.
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*
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* @since 2.4.0
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*
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* @param string $ip_address
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* @return bool
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*/
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private static function is_IPv6( $ip_address ) {
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return false !== filter_var( $ip_address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 );
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}
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}
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WC_Geolocation::init();
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