234 lines
8.4 KiB
PHP
234 lines
8.4 KiB
PHP
<?php
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namespace App\Http\Middleware;
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use Closure;
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use Illuminate\Http\Request;
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use Illuminate\Support\Facades\Cache;
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use Illuminate\Support\Facades\DB;
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class BotDetector
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{
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// Tamamen engelle — 403
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private const BAD_BOTS = [
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'scrapy', 'httrack', 'webcopier', 'webzip', 'teleportpro', 'webstripper',
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'offline explorer', 'larbin', 'libwww-perl',
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'masscan', 'nikto', 'sqlmap', 'nmap', 'zgrab', 'nuclei',
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'dirsearch', 'gobuster', 'feroxbuster', 'ffuf',
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'ahrefsbot', 'semrushbot', 'dotbot', 'mj12bot', 'blexbot',
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'bytespider', 'gptbot', 'claudebot', 'chatgpt-user',
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'ccbot', 'anthropic-ai', 'cohere-ai', 'omgili', 'omgilibot',
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'pinterestbot', 'petalbot', 'proximic', 'mediatoolkitbot',
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'dataforseobot', 'sitechecker', 'seokicks', 'linkfluence',
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'serpstatbot', 'serendeputy', 'riddler', 'netcraftsurveyagent',
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'netsystemsresearch', 'ioncrawl', 'brandverity',
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'wp_is_mobile', 'wordpress', 'wpbot',
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];
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// Bu IP prefix'leri için tüm kontroller atlanır (güvenilir crawler'lar)
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private const TRUSTED_IP_PREFIXES = [
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'66.249.', // Googlebot
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'64.233.', // Google
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'74.125.', // Google
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'209.85.', // Google
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'216.239.', // Google
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'34.68.', // Google Cloud us-central1
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'34.64.', // Google Cloud
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'35.187.', // Google Cloud
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'35.190.', // Google Cloud
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];
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// İzin ver ama bot olarak işaretle (SEO crawler'lar)
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private const GOOD_BOTS = [
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'googlebot', 'google-inspectiontool', 'google-structured-data-testing-tool',
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'adsbot-google', 'adsbot-google-mobile', 'mediapartners-google',
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'apis-google', 'feedfetcher-google', 'google-adwords-instant',
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'bingbot', 'msnbot', 'adidxbot', 'bingpreview',
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'duckduckbot', 'baiduspider', 'yandexbot', 'yandexmobilebot',
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'slurp', 'teoma', 'ia_archiver',
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'facebot', 'facebookexternalhit',
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'twitterbot', 'linkedinbot', 'whatsapp',
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'applebot', 'discordbot', 'telegrambot',
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'slackbot', 'pingdom',
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];
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// Rate-limit uygula (dakikada 10'dan fazla → uyarı, 30'dan fazla → otomatik engel)
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private const GENERIC_BOTS = [
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'curl/', 'wget/', 'python-requests', 'python-urllib',
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'go-http-client', 'java/', 'okhttp/', 'libcurl',
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'node-fetch', 'node.js', 'axios', 'got/',
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'apache-httpclient', 'php/', 'perl/', 'ruby',
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'postman', 'insomnia', 'httpie',
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];
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// Bu path'ler için sadece log tut, engelleme ve genel rate limit yapma
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private const SKIP_PATHS = [
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'/up',
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'/api/',
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'/sitemap',
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'/stream/',
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'/vtt-proxy',
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'/track/',
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'/calls/',
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'/episode/',
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'/comments',
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'/media/',
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'/assets/',
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'/build/',
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'/vendor/',
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];
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public function handle(Request $request, Closure $next)
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{
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$ip = $request->ip();
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$ua = strtolower($request->userAgent() ?? '');
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$path = '/' . ltrim($request->path(), '/');
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// index.php önekini normalize et (/index.php/stream/seg -> /stream/seg)
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if (str_starts_with($path, '/index.php/')) {
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$path = '/' . substr($path, 11);
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}
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// Skip paths
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foreach (self::SKIP_PATHS as $skip) {
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if (str_starts_with($path, $skip)) {
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return $next($request);
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}
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}
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// Güvenilir IP (Google vb.) — tüm kontrolleri atla
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foreach (self::TRUSTED_IP_PREFIXES as $prefix) {
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if (str_starts_with($ip, $prefix)) {
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return $next($request);
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}
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}
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// Manuel engelli IP kontrolü (Sadece yöneticinin manuel engellediği IP'ler)
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if ($this->isBlockedIp($ip)) {
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$this->logBot($ip, $request->userAgent(), $path, $request->method(), 'ip_blocked', 'blocked_ip');
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return response('Erişim engellendi.', 403);
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}
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// UA boşsa bot olarak işaretle
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if (empty($ua)) {
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$request->attributes->set('is_bot', true);
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$request->attributes->set('bot_type', 'noua');
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$this->logBot($ip, '', $path, $request->method(), 'allowed', 'no_ua');
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return $next($request);
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}
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// Kötü bot mu?
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foreach (self::BAD_BOTS as $pattern) {
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if (str_contains($ua, $pattern)) {
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$this->logBot($ip, $request->userAgent(), $path, $request->method(), 'blocked', $pattern);
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return response('', 403);
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}
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}
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// İyi bot mu?
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foreach (self::GOOD_BOTS as $pattern) {
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if (str_contains($ua, $pattern)) {
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$request->attributes->set('is_bot', true);
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$request->attributes->set('bot_type', 'good');
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// İyi botlar için rate limit (dakikada 120)
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if ($this->isRateLimited($ip, 120, 'good_bot')) {
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return response('', 429);
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}
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return $next($request);
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}
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}
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// Generic araç mı?
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foreach (self::GENERIC_BOTS as $pattern) {
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if (str_contains($ua, $pattern)) {
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$request->attributes->set('is_bot', true);
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$request->attributes->set('bot_type', 'generic');
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if ($this->isRateLimited($ip, 20, 'generic')) {
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$this->logBot($ip, $request->userAgent(), $path, $request->method(), 'rate_limited', $pattern);
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// 50+ istek → otomatik engelle
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$count = Cache::get("bot_count_{$ip}", 0);
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if ($count > 50) {
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$this->autoBlock($ip, 'Otomatik: dakikada 50+ generic bot isteği');
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}
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return response('', 429);
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}
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$this->logBot($ip, $request->userAgent(), $path, $request->method(), 'allowed', $pattern);
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return $next($request);
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}
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}
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// Normal kullanıcı — genel sayfa istek limiti (dakikada 300 sayfa isteği)
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if ($this->isRateLimited($ip, 300, 'human')) {
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$this->logBot($ip, $request->userAgent(), $path, $request->method(), 'rate_limited', 'human_flood');
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return response('Çok fazla istek gönderdiniz. Lütfen biraz bekleyin.', 429);
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}
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$request->attributes->set('is_bot', false);
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return $next($request);
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}
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private function isBlockedIp(string $ip): bool
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{
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return Cache::remember("blocked_ip_{$ip}", 30, function () use ($ip) {
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try {
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return DB::table('blocked_ips')
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->where('ip', $ip)
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->where('auto_blocked', 0)
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->where(function ($q) {
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$q->whereNull('expires_at')->orWhere('expires_at', '>', now());
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})
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->exists();
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} catch (\Exception) {
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return false;
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}
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});
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}
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private function isRateLimited(string $ip, int $maxPerMinute, string $type): bool
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{
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$key = "rl_{$type}_{$ip}";
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$count = Cache::get($key, 0);
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if ($count === 0) {
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Cache::put($key, 1, 60);
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} else {
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Cache::increment($key);
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}
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// Bot count ayrı izle
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Cache::put("bot_count_{$ip}", Cache::get("bot_count_{$ip}", 0) + 1, 60);
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return $count >= $maxPerMinute;
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}
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private function autoBlock(string $ip, string $reason): void
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{
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try {
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DB::table('blocked_ips')->insertOrIgnore([
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'ip' => $ip,
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'reason' => $reason,
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'auto_blocked' => 1,
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'blocked_at' => now(),
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'expires_at' => now()->addHours(24),
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]);
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Cache::forget("blocked_ip_{$ip}");
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} catch (\Exception) {}
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}
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private function logBot(string $ip, ?string $ua, string $path, string $method, string $action, string $botName): void
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{
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try {
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DB::table('analytics_bot_logs')->insert([
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'ip' => $ip,
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'user_agent' => mb_substr($ua ?? '', 0, 500),
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'path' => mb_substr($path, 0, 500),
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'method' => $method,
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'action' => $action,
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'bot_name' => mb_substr($botName, 0, 100),
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'created_at' => now(),
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]);
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} catch (\Exception) {}
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}
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}
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