54 lines
1.6 KiB
JavaScript
54 lines
1.6 KiB
JavaScript
var CACHE_NAME = 'trivial-static-image-gallery-v1';
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var urlsToCache = [
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'./',
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'./index.html',
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'./nsfw.html',
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'./index.json',
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'./nsfw.json',
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'./main.css',
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'./main.js',
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'./font-awesome-4.7.0/css/font-awesome.min.css',
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'./font-awesome-4.7.0/fonts/fontawesome-webfont.woff2',
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'./font-awesome-4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0'
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];
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self.addEventListener('install', event => {
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// Perform install steps
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event.waitUntil(
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caches.open(CACHE_NAME)
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.then(cache => {
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console.log('Opened cache');
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return cache.addAll(urlsToCache);
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})
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);
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});
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self.addEventListener('fetch', function (evt) {
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console.log('The service worker is serving the asset.');
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evt.respondWith(fromNetwork(evt.request, 15000).catch(function () {
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return fromCache(evt.request);
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}));
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});
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function fromNetwork(request, timeout) {
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return new Promise(function (fulfill, reject) {
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var timeoutId = setTimeout(reject, timeout);
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fetch(request).then(function (response) {
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clearTimeout(timeoutId);
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var responseToCache = response.clone();
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fulfill(response);
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caches.open(CACHE_NAME).then(function (cache) {
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cache.put(request, responseToCache);
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});
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}, reject);
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});
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}
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function fromCache(request) {
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return caches.open(CACHE_NAME).then(function (cache) {
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return cache.match(request).then(function (matching) {
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return matching || Promise.reject('no-match');
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});
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});
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}
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