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PyodideServiceWorker.js
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PyodideServiceWorker.js
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const appName = 'Lumen'
const appCacheName = 'Lumen-0.7.0a31';
const preCacheFiles = [];
const cachePatterns = ['https://cdn.holoviz.org/panel/1.5.3-b.1/dist/', 'https://cdn.bokeh.org/bokeh/', 'https://cdn.jsdelivr.net/pyodide/', 'https://files.pythonhosted.org/packages/', 'https://pypi.org/pypi/'];
self.addEventListener('install', (e) => {
console.log('[Service Worker] Install');
self.skipWaiting();
e.waitUntil((async () => {
const cacheNames = await caches.keys();
for (const cacheName of cacheNames) {
if (cacheName.startsWith(appName) && cacheName !== appCacheName) {
console.log(`[Service Worker] Delete old cache ${cacheName}`);
caches.delete(cacheName);
}
}
const cache = await caches.open(appCacheName);
if (preCacheFiles.length) {
console.log('[Service Worker] Precaching ');
}
preCacheFiles.forEach(async (cacheFile) => {
const request = new Request(cacheFile);
const response = await fetch(request);
if (response.ok || response.type == 'opaque') {
cache.put(request, response);
}
})
})());
});
self.addEventListener('activate', (event) => {
console.log('[Service Worker] Activating');
return self.clients.claim();
});
self.addEventListener('fetch', (e) => {
if (e.request.method !== 'GET') {
return
}
e.respondWith((async () => {
const cache = await caches.open(appCacheName);
let response = await cache.match(e.request);
console.log(`[Service Worker] Fetching resource: ${e.request.url}`);
if (response) {
return response;
}
response = await fetch(e.request);
if (!response.ok && !(response.type == 'opaque')) {
throw Error(`[Service Worker] Fetching resource ${e.request.url} failed with response: ${response.status}`);
}
console.log(`[Service Worker] Caching new resource: ${e.request.url}`);
if (e.request.mode !== 'no-cors') {
cache.put(e.request, response.clone());
}
return response;
})());
});