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@ -8,75 +8,75 @@ const to_cache = shell.concat(files); |
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const cached = new Set(to_cache); |
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self.addEventListener('install', event => { |
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event.waitUntil( |
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caches |
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.open(ASSETS) |
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.then(cache => cache.addAll(to_cache)) |
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.then(() => { |
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self.skipWaiting(); |
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}) |
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); |
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event.waitUntil( |
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caches |
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.open(ASSETS) |
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.then(cache => cache.addAll(to_cache)) |
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.then(() => { |
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self.skipWaiting(); |
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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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caches.keys().then(async keys => { |
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// delete old caches
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for (const key of keys) { |
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if (key !== ASSETS) await caches.delete(key); |
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} |
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event.waitUntil( |
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caches.keys().then(async keys => { |
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// delete old caches
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for (const key of keys) { |
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if (key !== ASSETS) await caches.delete(key); |
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} |
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self.clients.claim(); |
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}) |
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); |
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self.clients.claim(); |
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}) |
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); |
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}); |
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self.addEventListener('fetch', event => { |
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if (event.request.method !== 'GET' || event.request.headers.has('range')) return; |
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if (event.request.method !== 'GET' || event.request.headers.has('range')) return; |
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const url = new URL(event.request.url); |
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const url = new URL(event.request.url); |
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// don't try to handle e.g. data: URIs
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if (!url.protocol.startsWith('http')) return; |
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// don't try to handle e.g. data: URIs
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if (!url.protocol.startsWith('http')) return; |
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// ignore dev server requests
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if (url.hostname === self.location.hostname && url.port !== self.location.port) return; |
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// ignore dev server requests
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if (url.hostname === self.location.hostname && url.port !== self.location.port) return; |
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// always serve static files and bundler-generated assets from cache
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if (url.host === self.location.host && cached.has(url.pathname)) { |
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event.respondWith(caches.match(event.request)); |
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return; |
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} |
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// always serve static files and bundler-generated assets from cache
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if (url.host === self.location.host && cached.has(url.pathname)) { |
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event.respondWith(caches.match(event.request)); |
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return; |
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} |
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// for pages, you might want to serve a shell `service-worker-index.html` file,
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// which Sapper has generated for you. It's not right for every
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// app, but if it's right for yours then uncomment this section
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/* |
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if (url.origin === self.origin && routes.find(route => route.pattern.test(url.pathname))) { |
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event.respondWith(caches.match('/service-worker-index.html')); |
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return; |
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} |
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*/ |
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// for pages, you might want to serve a shell `service-worker-index.html` file,
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// which Sapper has generated for you. It's not right for every
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// app, but if it's right for yours then uncomment this section
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/* |
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if (url.origin === self.origin && routes.find(route => route.pattern.test(url.pathname))) { |
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event.respondWith(caches.match('/service-worker-index.html')); |
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return; |
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} |
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*/ |
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if (event.request.cache === 'only-if-cached') return; |
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if (event.request.cache === 'only-if-cached') return; |
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// for everything else, try the network first, falling back to
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// cache if the user is offline. (If the pages never change, you
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// might prefer a cache-first approach to a network-first one.)
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event.respondWith( |
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caches |
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.open(`offline${timestamp}`) |
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.then(async cache => { |
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try { |
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const response = await fetch(event.request); |
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cache.put(event.request, response.clone()); |
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return response; |
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} catch(err) { |
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const response = await cache.match(event.request); |
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if (response) return response; |
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// for everything else, try the network first, falling back to
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// cache if the user is offline. (If the pages never change, you
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// might prefer a cache-first approach to a network-first one.)
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event.respondWith( |
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caches |
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.open(`offline${timestamp}`) |
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.then(async cache => { |
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try { |
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const response = await fetch(event.request, {credentials: 'same-origin'}); |
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// cache.put(event.request, response.clone());
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return response; |
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} catch(err) { |
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const response = await cache.match(event.request); |
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if (response) return response; |
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throw err; |
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} |
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}) |
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); |
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throw err; |
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} |
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}) |
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); |
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}); |
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