import { freeStorage, storageFreeable } from '../storage/modifier'; import './web_push_notifications'; function openSystemCache() { return caches.open('mastodon-system'); } function openWebCache() { return caches.open('mastodon-web'); } function fetchRoot() { return fetch('/', { credentials: 'include', redirect: 'manual' }); } const firefox = navigator.userAgent.match(/Firefox\/(\d+)/); const invalidOnlyIfCached = firefox && firefox[1] < 60; // Cause a new version of a registered Service Worker to replace an existing one // that is already installed, and replace the currently active worker on open pages. self.addEventListener('install', function(event) { event.waitUntil(Promise.all([openWebCache(), fetchRoot()]).then(([cache, root]) => cache.put('/', root))); }); self.addEventListener('activate', function(event) { event.waitUntil(self.clients.claim()); }); self.addEventListener('fetch', function(event) { const url = new URL(event.request.url); if (url.pathname.startsWith('/web/')) { const asyncResponse = fetchRoot(); const asyncCache = openWebCache(); event.respondWith(asyncResponse.then( response => asyncCache.then(cache => cache.put('/', response.clone())) .then(() => response), () => asyncCache.then(cache => cache.match('/')))); } else if (url.pathname === '/auth/sign_out') { const asyncResponse = fetch(event.request); const asyncCache = openWebCache(); event.respondWith(asyncResponse.then(response => { if (response.ok || response.type === 'opaqueredirect') { return Promise.all([ asyncCache.then(cache => cache.delete('/')), indexedDB.deleteDatabase('mastodon'), ]).then(() => response); } return response; })); } else if (storageFreeable && process.env.CDN_HOST ? url.host === process.env.CDN_HOST : url.pathname.startsWith('/system/')) { event.respondWith(openSystemCache().then(cache => { return cache.match(event.request.url).then(cached => { if (cached === undefined) { const asyncResponse = invalidOnlyIfCached && event.request.cache === 'only-if-cached' ? fetch(event.request, { cache: 'no-cache' }) : fetch(event.request); return asyncResponse.then(response => { if (response.ok) { const put = cache.put(event.request.url, response.clone()); put.catch(() => freeStorage()); return put.then(() => { freeStorage(); return response; }); } return response; }); } return cached; }); })); } });