https://www.skionline.pl/service-worker.js

1const SOL_CACHE = 'skionline-pl-v15';
2
3const SOL_FILES = [
4	'/styl.css?v=15',
5	'/inne/js/skrypty.js?v=15',
6	'/inne/js/skrypty_new.js?v=15',
7	'/inne/errors/offline-skionline-pl.html',
8	'/images/logo-skionline-pl.png'
9];
10
11self.addEventListener('install', event => {
12	self.skipWaiting();
13	event.waitUntil(
14		caches.open(SOL_CACHE).then(cache => cache.addAll(SOL_FILES))
15	);
16});
17
18self.addEventListener('activate', event => {
19	event.waitUntil(
20		caches.keys().then(names => {
21			const oldCaches = names
22				.filter(name => name !== SOL_CACHE)
23				.map(name => caches.delete(name));
24
25			return Promise.all([
26				self.clients.claim(),
27				...oldCaches
28			]);
29		})
30	);
31});
32
33self.addEventListener('fetch', event => {
34
35	const request = event.request;
36	const url = new URL(request.url);
37
38	if (url.pathname.startsWith('/inne/narzedzia/') || url.pathname.startsWith('/_administracja/')) {
39		return;
40	}
41
42	if (request.method !== 'GET') return;
43	if (url.protocol !== 'http:' && url.protocol !== 'https:') return;
44	if (url.origin !== self.location.origin) return;
45	if (url.pathname.endsWith('.php')) return;
46
47	const isHTML = request.headers.get('accept')?.includes('text/html');
48	const isAjax = request.headers.get('x-requested-with') === 'XMLHttpRequest';
49
50	if (isHTML || isAjax) {
51		event.respondWith(
52			fetch(request).catch(async () => {
53				const cache = await caches.match('/inne/errors/offline-skionline-pl.html');
54				return cache || new Response('Offline', { status: 503 });
55			})
56		);
57		return;
58	}
59
60	event.respondWith(
61		caches.match(request).then(cacheResponse => {
62
63			const fetchPromise = fetch(request).then(networkResponse => {
64
65				if (!networkResponse) {
66					return new Response('', { status: 502 });
67				}
68
69				if (networkResponse.status !== 200) {
70					return networkResponse;
71				}
72
73				const responseClone = networkResponse.clone();
74
75				caches.open(SOL_CACHE).then(cache => {
76					cache.put(request, responseClone);
77				});
78
79				return networkResponse;
80
81			}).catch(() => {
82				return cacheResponse || new Response('', { status: 504 });
83			});
84
85			return cacheResponse || fetchPromise;
86		})
87	);
88});