79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
var APP_NAME = 'breaklock',
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APP_VERSION = 12,
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CACHE_NAME = APP_NAME + '_' + APP_VERSION;
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var filesToCache = [
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'./',
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'./?utm_source=homescreen',
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'./app.css',
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'./app.js',
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'./assets/intro.svg',
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'./assets/fonts/robotomono-light-webfont.woff2',
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'./assets/fonts/robotomono-light-webfont.woff',
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'./assets/fonts/robotomono-light-webfont.ttf'
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];
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// Service worker from Google Documentation
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self.addEventListener('install', function(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(function(cache) {
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return cache.addAll(filesToCache);
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})
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);
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});
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self.addEventListener('activate', function(event) {
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event.waitUntil(
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caches.keys().then(function(cacheNames) {
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return Promise.all(
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cacheNames.map(function(cacheName) {
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if (cacheName.indexOf(APP_NAME) === 0 && CACHE_NAME !== cacheName) {
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return caches.delete(cacheName);
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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('fetch', function(event) {
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event.respondWith(
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caches.match(event.request)
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.then(function(response) {
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// Cache hit - return response
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if (response) {
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return response;
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}
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// IMPORTANT: Clone the request. A request is a stream and
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// can only be consumed once. Since we are consuming this
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// once by cache and once by the browser for fetch, we need
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// to clone the response.
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var fetchRequest = event.request.clone();
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return fetch(fetchRequest).then(
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function(response) {
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// Check if we received a valid response
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if(!response || response.status !== 200 || response.type !== 'basic') {
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return response;
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}
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// IMPORTANT: Clone the response. A response is a stream
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// and because we want the browser to consume the response
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// as well as the cache consuming the response, we need
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// to clone it so we have two streams.
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var responseToCache = response.clone();
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caches.open(CACHE_NAME)
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.then(function(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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});
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