89 lines
1.9 KiB
JavaScript
89 lines
1.9 KiB
JavaScript
---
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layout: compress
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permalink: '/sw.js'
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# PWA service worker
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---
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self.importScripts('{{ "/assets/js/data/swcache.js" | relative_url }}');
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const cacheName = 'chirpy-{{ "now" | date: "%s" }}';
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function verifyDomain(url) {
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for (const domain of allowedDomains) {
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const regex = RegExp(`^http(s)?:\/\/${domain}\/`);
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if (regex.test(url)) {
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return true;
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}
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}
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return false;
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}
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function isExcluded(url) {
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for (const item of denyUrls) {
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if (url === item) {
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return true;
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}
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}
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return false;
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}
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self.addEventListener('install', (event) => {
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event.waitUntil(
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caches.open(cacheName).then((cache) => {
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return cache.addAll(resource);
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})
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);
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});
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self.addEventListener('activate', (event) => {
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event.waitUntil(
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caches.keys().then((keyList) => {
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return Promise.all(
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keyList.map((key) => {
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if (key !== cacheName) {
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return caches.delete(key);
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}
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})
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);
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})
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);
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});
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self.addEventListener('message', (event) => {
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if (event.data === 'SKIP_WAITING') {
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self.skipWaiting();
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}
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});
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self.addEventListener('fetch', (event) => {
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event.respondWith(
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caches.match(event.request).then((response) => {
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if (response) {
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return response;
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}
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return fetch(event.request).then((response) => {
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const url = event.request.url;
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if (
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event.request.method !== 'GET' ||
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!verifyDomain(url) ||
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isExcluded(url)
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) {
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return response;
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}
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/* see: <https://developers.google.com/web/fundamentals/primers/service-workers#cache_and_return_requests> */
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let responseToCache = response.clone();
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caches.open(cacheName).then((cache) => {
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/* console.log('[sw] Caching new resource: ' + event.request.url); */
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cache.put(event.request, responseToCache);
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});
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return response;
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});
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})
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);
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});
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