root
61 lines
1.6 KiB
PHP
61 lines
1.6 KiB
PHP
<?php
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declare(strict_types=1);
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namespace app\common\service;
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/**
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* 分流链接 IP 防护：开启时校验访客 IP 国家是否在链接投放国家列表内
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*/
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class SplitIpProtectService
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{
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/**
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* 是否允许继续轮转跳转
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*
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* @param int|string $ipProtect 链接 ip_protect：0=关闭，1=开启
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* @param string $countriesStorage 链接 countries 字段（ISO2 逗号分隔）
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* @param string $clientIp 访客 IP
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*/
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public static function isAllowed($ipProtect, string $countriesStorage, string $clientIp): bool
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{
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if ((int) $ipProtect !== 1) {
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return true;
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}
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$allowed = self::parseAllowedCountries($countriesStorage);
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if ($allowed === []) {
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return false;
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}
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if (!SplitGeoIpService::isDatabaseAvailable()) {
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return false;
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}
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$visitorCountry = SplitGeoIpService::getCountryIso2($clientIp);
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if ($visitorCountry === null || $visitorCountry === '') {
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return false;
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}
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return in_array($visitorCountry, $allowed, true);
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}
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/**
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* @return array<int, string> 大写 ISO2 列表
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*/
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public static function parseAllowedCountries(string $storage): array
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{
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if (trim($storage) === '') {
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return [];
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}
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$result = [];
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foreach (explode(',', $storage) as $code) {
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$code = strtoupper(trim($code));
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if ($code !== '' && !in_array($code, $result, true)) {
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$result[] = $code;
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}
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}
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return $result;
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}
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}
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