100 lines
2.5 KiB
PHP
100 lines
2.5 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Blog\Support;
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use Illuminate\Http\Request;
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use Illuminate\Support\Facades\Cache;
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use Symfony\Component\HttpFoundation\Response;
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/**
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* 前台页面响应缓存：
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* - 仅缓存匿名 GET 请求的 HTML 页面（首页/列表/文章/归档/标签等）
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* - 登录用户、后台、API、动态端点不缓存
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* - 浏览量走独立的 /track-view 端点，不受整页缓存影响
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*/
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class PageCacheMiddleware
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{
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public const TAG = 'pages';
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public function handle(Request $request, \Closure $next): Response
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{
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if (! $this->shouldCache($request)) {
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return $next($request);
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}
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$key = $this->key($request);
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$ttl = (int) config('blog.page_cache_ttl', 300);
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if ($cached = Cache::get($key)) {
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return response($cached['body'], 200, [
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'Content-Type' => $cached['type'],
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'Cache-Control' => 'public, max-age='.$ttl,
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]);
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}
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$response = $next($request);
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if ($response->getStatusCode() === 200) {
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Cache::put($key, [
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'body' => $response->getContent(),
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'type' => $response->headers->get('Content-Type') ?: 'text/html; charset=utf-8',
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], $ttl);
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self::rememberKey($key);
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}
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return $response;
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}
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public static function flush(): void
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{
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foreach ((array) Cache::get(self::TAG.'_keys', []) as $key) {
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Cache::forget($key);
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}
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Cache::forget(self::TAG.'_keys');
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}
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public static function count(): int
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{
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return count((array) Cache::get(self::TAG.'_keys', []));
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}
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private static function rememberKey(string $key): void
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{
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$keys = (array) Cache::get(self::TAG.'_keys', []);
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$keys[$key] = true;
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Cache::put(self::TAG.'_keys', $keys, now()->addDay());
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}
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private function shouldCache(Request $request): bool
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{
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if (! $request->isMethod('GET')) {
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return false;
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}
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if (auth()->check()) {
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return false;
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}
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$path = $request->path();
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if (str_starts_with($path, 'admin') || str_starts_with($path, 'api') || str_starts_with($path, 'themes')) {
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return false;
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}
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// 动态端点
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if (str_starts_with($path, 'track-view')) {
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return false;
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}
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return true;
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}
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private function key(Request $request): string
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{
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return self::TAG.':'.md5($request->fullUrl());
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}
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}
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