44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
const sw_version = '0.1.0';
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const cache_name = `sake-v${sw_version}`;
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const cached_files = [
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'/',
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'/app.js',
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'/index.html',
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'/vendor/base32.min.js',
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'/vendor/base32.min.js.map',
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'/vendor/sha256.min.js',
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];
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function log_message(msg) {
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console.log(`[Service Worker] v${sw_version}: ${msg}`);
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}
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self.addEventListener('install', (event) => {
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log_message('Installed');
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self.skipWaiting();
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event.waitUntil(caches.open(cache_name).then((cache) => {
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log_message('Caching all');
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return cache.addAll(cached_files);
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}));
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});
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self.addEventListener('fetch', (event) => {
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if (!(event.request.url.startsWith('https:') || event.request.url.startsWith('http:'))) {
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log_message(`Fetching resource failed: invalid protocol: ${event.request.url}`);
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return;
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}
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event.respondWith((async () => {
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log_message(`Fetching resource: ${event.request.url}`);
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const cache_promise = await caches.match(event.request);
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if (cache_promise) {
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log_message(`Resource retrieved from cache: ${event.request.url}`);
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return cache_promise;
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}
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const fetch_promise = await fetch(event.request);
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const cache = await caches.open(cache_name);
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log_message(`Caching new resource: ${event.request.url}`);
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cache.put(event.request, fetch_promise.clone());
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return fetch_promise;
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})());
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});
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