107 lines
3.7 KiB
JavaScript
107 lines
3.7 KiB
JavaScript
// NOTE: This service worker is for the web/PWA build.
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// For development we aggressively unregister SWs in `src/player.js`.
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//
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// Bump this value whenever caching logic changes to guarantee clients don't
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// keep an old UI after updates.
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const CACHE_NAME = 'radioplayer-pwa-v4';
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const CORE_ASSETS = [
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'./',
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'index.html',
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'data/radio-stations.json',
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'stations.json',
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'manifest.json',
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'assets/radioplayer-logo-192.png',
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'assets/radioplayer-logo-512.png',
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];
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const CORE_PATHS = new Set(CORE_ASSETS.map((p) => new URL(p, self.registration.scope).pathname));
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self.addEventListener('install', (event) => {
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// Activate updated SW as soon as it's installed.
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self.skipWaiting();
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event.waitUntil(
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caches.open(CACHE_NAME).then(async (cache) => {
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const reqs = CORE_ASSETS.map((p) => new Request(p, { cache: 'reload' }));
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await cache.addAll(reqs);
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// Vite fingerprints JS/CSS assets in production. Parse the built HTML so
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// the installed PWA can launch offline after its first install.
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try {
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const indexResp = await fetch(new Request('./', { cache: 'reload' }));
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const indexText = await indexResp.clone().text();
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await cache.put('./', indexResp);
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const assetUrls = [...indexText.matchAll(/(?:src|href)="([^"]+)"/g)]
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.map((match) => match[1])
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.filter((assetPath) => assetPath.startsWith('./assets/') || assetPath.startsWith('assets/'))
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.map((assetPath) => new URL(assetPath, self.registration.scope).href);
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await Promise.all(assetUrls.map((assetUrl) => {
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return cache.add(new Request(assetUrl, { cache: 'reload' })).catch(() => {});
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}));
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} catch (e) {
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// If HTML parsing fails, runtime caching below still catches assets.
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}
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})
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);
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});
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self.addEventListener('activate', (event) => {
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event.waitUntil(
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Promise.all([
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self.clients.claim(),
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caches.keys().then((keys) => Promise.all(
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keys.map((k) => { if (k !== CACHE_NAME) return caches.delete(k); return null; })
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)),
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])
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);
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});
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self.addEventListener('fetch', (event) => {
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// Only handle GET requests
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if (event.request.method !== 'GET') return;
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const url = new URL(event.request.url);
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// Don't cache cross-origin requests (station logos, APIs, etc.).
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if (url.origin !== self.location.origin) {
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return;
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}
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const isCore = CORE_PATHS.has(url.pathname);
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const isHtmlNavigation = event.request.mode === 'navigate' || (event.request.headers.get('accept') || '').includes('text/html');
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// Network-first for navigations and core assets to prevent "old UI" issues.
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if (isHtmlNavigation || isCore) {
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event.respondWith(
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fetch(event.request)
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.then((networkResp) => {
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const respClone = networkResp.clone();
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caches.open(CACHE_NAME).then((cache) => cache.put(event.request, respClone)).catch(() => {});
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return networkResp;
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})
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.catch(() => caches.match(event.request).then((cached) => cached || caches.match('./') || caches.match('index.html')))
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);
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return;
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}
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event.respondWith(
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caches.match(event.request).then((cached) => {
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if (cached) return cached;
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return fetch(event.request).then((networkResp) => {
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// Optionally cache new resources (best-effort)
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try {
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const respClone = networkResp.clone();
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caches.open(CACHE_NAME).then((cache) => cache.put(event.request, respClone)).catch(()=>{});
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} catch (e) {}
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return networkResp;
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}).catch(() => {
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// If offline and HTML navigation, return cached index.html
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if (event.request.mode === 'navigate') return caches.match('./') || caches.match('index.html');
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return new Response('', { status: 503, statusText: 'Service Unavailable' });
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});
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})
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);
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});
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