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| const swconfig = { CACHE_VERSION: "v2.0", runtimeCaching: [ { urlPattern: RegExp('^https://www.favicon.vip/get.php'), handler: "CacheFirst", maxAgeSeconds: 60 * 60 * 24 * 365 }, { urlPattern: RegExp('^https://image.thum.io/'), handler: "CacheFirst", maxAgeSeconds: 60 * 60 * 24 * 30 }, { urlPattern: /https?:\/\/[^\/]+\/.*\.(png|jpg|jpeg|gif|svg|ico|woff2|ttf|js|css?)(\?.*)?/, handler: "CacheFirst", maxAgeSeconds: 60 * 60 * 24 * 365 }, { urlPattern: /^https:\/\/ik.imagekit.io\//, handler: "CacheFirst", maxAgeSeconds: 0 }, { urlPattern: /^https:\/\/weavatar.com\/avatar\//, handler: "CacheFirst", maxAgeSeconds: 60 * 60 * 24 * 30 }, { urlPattern: /^https:\/\/assets.ksable.top\/js\/my-js.js/, handler: "CacheFirst", maxAgeSeconds: 60 * 60 * 24 * 1 } ], exclude: [ /^https:\/\/blog.ksable.top\/sw.js/gi ], precacheUrls: [ '/content.json', '/offline.html' ] };
const CACHE_NAME = `${swconfig.CACHE_VERSION}-cache`; const CACHE_META_KEY = 'cache-meta'; const OFFLINE_URL = '/offline.html';
function matchRule(request) { const url = request.url;
for (const pattern of swconfig.exclude) { if (pattern.test(url)) return null; }
for (let i = swconfig.runtimeCaching.length - 1; i >= 0; i--) { const rule = swconfig.runtimeCaching[i]; if (rule.urlPattern.test(url)) { return rule; } }
return null; }
async function getCacheMeta() { const cache = await caches.open(CACHE_NAME); const response = await cache.match(CACHE_META_KEY); return response ? await response.json() : {}; }
async function updateCacheMeta(url, timestamp) { const cache = await caches.open(CACHE_NAME); const meta = await getCacheMeta();
meta[url] = { timestamp, cachedAt: Date.now() };
await cache.put( CACHE_META_KEY, new Response(JSON.stringify(meta), { headers: { 'Content-Type': 'application/json' } }) ); }
async function backgroundUpdate(request, rule) { try { const cache = await caches.open(CACHE_NAME); const cachedResponse = await cache.match(request);
if (!cachedResponse) return;
const headers = new Headers(); const etag = cachedResponse.headers.get('ETag'); const lastModified = cachedResponse.headers.get('Last-Modified');
if (etag) headers.set('If-None-Match', etag); if (lastModified) headers.set('If-Modified-Since', lastModified);
const networkResponse = await fetch(request, { headers, cache: 'no-cache' });
if (networkResponse.status === 304) { await updateCacheMeta(request.url, Date.now()); } else if (networkResponse.ok) { const responseClone = networkResponse.clone(); await cache.put(request, responseClone); await updateCacheMeta(request.url, Date.now()); } } catch (error) { console.error('Background update failed:', error); } }
self.addEventListener('install', event => { event.waitUntil( caches.open(CACHE_NAME).then(cache => { return cache.put( CACHE_META_KEY, new Response('{}', { headers: { 'Content-Type': 'application/json' } }) ).then(() => { return cache.addAll(swconfig.precacheUrls); }); }).then(() => self.skipWaiting()) ); });
self.addEventListener('activate', event => { event.waitUntil( caches.keys().then(cacheNames => { return Promise.all( cacheNames.map(name => { if (name !== CACHE_NAME && name.startsWith('v')) { return caches.delete(name); } }) ); }).then(() => self.clients.claim()) ); });
self.addEventListener('fetch', event => { const request = event.request;
if (request.method !== 'GET') return;
if (request.mode === 'navigate') { event.respondWith( (async () => { try { const networkResponse = await fetch(request); return networkResponse; } catch (error) { const offlineResponse = await caches.match(OFFLINE_URL); if (offlineResponse) { return offlineResponse; } return new Response('Offline', { status: 503, statusText: 'Service Unavailable' }); } })() ); return; } const rule = matchRule(request); if (!rule) return;
switch (rule.handler) { case 'NetworkOnly': event.respondWith(fetch(request)); break;
case 'CacheOnly': event.respondWith( caches.match(request).then(response => response || Response.error()) ); break;
case 'NetworkFirst': event.respondWith( fetch(request).catch(() => caches.match(request)) ); break;
case 'CacheFirst': default: event.respondWith((async () => { const cache = await caches.open(CACHE_NAME); const cachedResponse = await cache.match(request); const meta = await getCacheMeta(); const url = request.url; const metaEntry = meta[url];
if (cachedResponse) { if (rule.maxAgeSeconds > 0 && metaEntry) { const age = (Date.now() - metaEntry.cachedAt) / 1000; if (age > rule.maxAgeSeconds) { event.waitUntil(backgroundUpdate(request, rule)); } } return cachedResponse; }
try { const networkResponse = await fetch(request); if (networkResponse.ok) { const responseClone = networkResponse.clone(); await cache.put(request, responseClone); await updateCacheMeta(url, Date.now()); } return networkResponse; } catch (error) { return Response.error(); } })()); break; } });
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