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