75 lines
2.4 KiB
JavaScript
75 lines
2.4 KiB
JavaScript
const CACHE_NAME = 'medi-customers-v1';
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const urlsToCache = [
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'/',
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'/static/css/styles.css',
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'/static/js/script.js',
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'/static/images/logo.png',
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'/static/images/icon-192x192.png',
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'/static/images/icon-512x512.png'
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];
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// Installation des Service Workers
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self.addEventListener('install', event => {
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event.waitUntil(
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caches.open(CACHE_NAME)
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.then(cache => {
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console.log('Cache geöffnet');
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return cache.addAll(urlsToCache);
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})
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);
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});
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// Aktivierung des Service Workers
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self.addEventListener('activate', event => {
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event.waitUntil(
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caches.keys().then(cacheNames => {
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return Promise.all(
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cacheNames.map(cacheName => {
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if (cacheName !== CACHE_NAME) {
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console.log('Lösche alten Cache:', cacheName);
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return caches.delete(cacheName);
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}
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})
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);
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})
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);
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});
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// Fetch-Event-Handler
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self.addEventListener('fetch', event => {
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event.respondWith(
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caches.match(event.request)
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.then(response => {
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// Cache-Treffer - gib die Antwort zurück
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if (response) {
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return response;
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}
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// Kein Cache-Treffer - führe Netzwerkanfrage durch
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return fetch(event.request)
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.then(response => {
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// Prüfe, ob wir eine gültige Antwort erhalten haben
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if (!response || response.status !== 200 || response.type !== 'basic') {
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return response;
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}
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// Klone die Antwort
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const responseToCache = response.clone();
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// Speichere die Antwort im Cache
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caches.open(CACHE_NAME)
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.then(cache => {
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cache.put(event.request, responseToCache);
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});
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return response;
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})
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.catch(() => {
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// Fallback für Offline-Zugriff
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if (event.request.mode === 'navigate') {
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return caches.match('/offline.html');
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}
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});
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})
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);
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});
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