56 lines
1.8 KiB
JavaScript
56 lines
1.8 KiB
JavaScript
import {joinPaths} from '../utils.js';
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const {useServiceWorker, assetUrlPrefix, appVer} = window.config;
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const cachePrefix = 'static-cache-v'; // actual version is set in the service worker script
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const workerAssetPath = joinPaths(assetUrlPrefix, 'serviceworker.js');
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async function unregisterAll() {
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for (const registration of await navigator.serviceWorker.getRegistrations()) {
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if (registration.active) await registration.unregister();
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}
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}
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async function unregisterOtherWorkers() {
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for (const registration of await navigator.serviceWorker.getRegistrations()) {
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const scriptURL = registration.active?.scriptURL || '';
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if (!scriptURL.endsWith(workerAssetPath)) await registration.unregister();
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}
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}
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async function invalidateCache() {
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for (const key of await caches.keys()) {
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if (key.startsWith(cachePrefix)) caches.delete(key);
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}
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}
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async function checkCacheValidity() {
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const cacheKey = appVer;
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const storedCacheKey = localStorage.getItem('staticCacheKey');
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// invalidate cache if it belongs to a different gitea version
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if (cacheKey && storedCacheKey !== cacheKey) {
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await invalidateCache();
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localStorage.setItem('staticCacheKey', cacheKey);
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}
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}
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export default async function initServiceWorker() {
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if (!('serviceWorker' in navigator)) return;
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if (useServiceWorker) {
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// unregister all service workers where scriptURL does not match the current one
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await unregisterOtherWorkers();
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try {
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// the spec strictly requires it to be same-origin so the AssetUrlPrefix should contain AppSubUrl
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await checkCacheValidity();
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await navigator.serviceWorker.register(workerAssetPath);
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} catch (err) {
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console.error(err);
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await invalidateCache();
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await unregisterAll();
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}
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} else {
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await invalidateCache();
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await unregisterAll();
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}
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}
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