blob: 70ca1692057ee32e13118842c28a12f92cca8964 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
const API_CACHE_NAME = 'api-cache-v1'
const API_URL_PATTERN = /\/api\/(GetStopList)/;
const API_MAX_AGE = 24 * 60 * 60 * 1000; // 24 hours
self.addEventListener('install', (event) => {
event.waitUntil(self.skipWaiting());
});
self.addEventListener('activate', (event) => {
event.waitUntil(self.clients.claim());
});
self.addEventListener('fetch', async (event) => {
const url = new URL(event.request.url);
if (event.request.method !== "GET" || !API_URL_PATTERN.test(url.pathname)) {
return;
}
event.respondWith(apiCacheFirst(event.request));
});
async function apiCacheFirst(request) {
const cache = await caches.open(API_CACHE_NAME);
const cachedResponse = await cache.match(request);
if (cachedResponse) {
const age = Date.now() - new Date(cachedResponse.headers.get('date')).getTime();
if (age < API_MAX_AGE) {
console.debug(`SW: Cache HIT for ${request.url}`);
return cachedResponse;
}
// Cache is too old, fetch a fresh copy
cache.delete(request);
}
try {
const netResponse = await fetch(request);
const responseToCache = netResponse.clone();
cache.put(request, responseToCache);
console.debug(`SW: Cache MISS for ${request.url}`);
return netResponse;
} catch (error) {
throw error;
}
}
|
