92 lines
2 KiB
JavaScript
92 lines
2 KiB
JavaScript
importScripts('./assets/js/data/swconf.js');
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const purge = swconf.purge;
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const interceptor = swconf.interceptor;
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function verifyUrl(url) {
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const requestUrl = new URL(url);
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const requestPath = requestUrl.pathname;
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if (!requestUrl.protocol.startsWith('http')) {
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return false;
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}
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for (const prefix of interceptor.urlPrefixes) {
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if (requestUrl.href.startsWith(prefix)) {
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return false;
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}
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}
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for (const path of interceptor.paths) {
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if (requestPath.startsWith(path)) {
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return false;
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}
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}
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return true;
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}
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self.addEventListener('install', (event) => {
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if (purge) {
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return;
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}
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event.waitUntil(
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caches.open(swconf.cacheName).then((cache) => {
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return cache.addAll(swconf.resources);
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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 (purge) {
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return caches.delete(key);
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} else {
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if (key !== swconf.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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});
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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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if (event.request.headers.has('range')) {
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return;
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}
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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 (purge || event.request.method !== 'GET' || !verifyUrl(url)) {
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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(swconf.cacheName).then((cache) => {
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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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