san
74 lines
2.3 KiB
JavaScript
74 lines
2.3 KiB
JavaScript
const CACHE_NAME = 'minecraft-web-v1';
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const ASSETS_TO_CACHE = [
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'./',
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'./index.html',
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'./index.js',
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'./index.wasm',
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'./mc_platform.js',
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'./manifest.json'
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];
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// Install event: cache core assets
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self.addEventListener('install', event => {
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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(ASSETS_TO_CACHE);
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})
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);
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});
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// Activate event: clean up old caches
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self.addEventListener('activate', event => {
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event.waitUntil(
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caches.keys().then(cacheNames => {
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return Promise.all(
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cacheNames.map(cacheName => {
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if (cacheName !== CACHE_NAME) {
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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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// Fetch event: Network falling back to cache
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self.addEventListener('fetch', event => {
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// Only intercept GET requests, and skip extensions like browser-sync if running locally
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if (event.request.method !== 'GET') return;
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event.respondWith(
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fetch(event.request)
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.then(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(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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.catch(() => {
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// If network fails, fallback to cache
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return 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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// Could return a fallback offline page here if needed
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});
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})
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);
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});
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