121 lines
4 KiB
JavaScript
121 lines
4 KiB
JavaScript
const cacheVersion = 'v1.1.3';
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const cacheTitle = `pairdrop-cache-${cacheVersion}`;
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const urlsToCache = [
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'index.html',
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'./',
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'styles.css',
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'scripts/network.js',
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'scripts/ui.js',
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'scripts/util.js',
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'scripts/qrcode.js',
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'scripts/zip.min.js',
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'scripts/NoSleep.min.js',
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'scripts/theme.js',
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'sounds/blop.mp3',
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'images/favicon-96x96.png',
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'images/favicon-96x96-notification.png',
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'images/android-chrome-192x192.png',
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'images/android-chrome-192x192-maskable.png',
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'images/android-chrome-512x512.png',
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'images/android-chrome-512x512-maskable.png',
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'images/apple-touch-icon.png',
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];
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self.addEventListener('install', function(event) {
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// Perform install steps
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event.waitUntil(
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caches.open(cacheTitle)
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.then(function(cache) {
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return cache.addAll(urlsToCache).then(_ => {
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console.log('All files cached.');
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});
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})
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);
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});
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// fetch the resource from the network
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const fromNetwork = (request, timeout) =>
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new Promise((fulfill, reject) => {
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const timeoutId = setTimeout(reject, timeout);
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fetch(request).then(response => {
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clearTimeout(timeoutId);
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fulfill(response);
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update(request);
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}, reject);
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});
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// fetch the resource from the browser cache
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const fromCache = request =>
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caches
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.open(cacheTitle)
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.then(cache =>
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cache
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.match(request)
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.then(matching => matching || cache.match('/offline/'))
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);
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// cache the current page to make it available for offline
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const update = request =>
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caches
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.open(cacheTitle)
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.then(cache =>
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fetch(request).then(response => {
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cache.put(request, response).then(_ => {
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console.log("Page successfully cached.")
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})
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})
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);
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// general strategy when making a request (eg if online try to fetch it
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// from the network with a timeout, if something fails serve from cache)
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self.addEventListener('fetch', function(event) {
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if (event.request.method === "POST") {
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// Requests related to Web Share Target.
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event.respondWith(
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(async () => {
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const formData = await event.request.formData();
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const title = formData.get("title");
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const text = formData.get("text");
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const url = formData.get("url");
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const files = formData.get("files");
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let share_url = "/";
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if (files.length > 0) {
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share_url = "/?share-target=files";
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const db = await window.indexedDB.open('pairdrop_store');
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const tx = db.transaction('share_target_files', 'readwrite');
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const store = tx.objectStore('share_target_files');
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for (let i=0; i<files.length; i++) {
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await store.add(files[i]);
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}
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await tx.complete
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db.close()
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} else if (title.length > 0 || text.length > 0 || url.length) {
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share_url = `/?share-target=text&title=${title}&text=${text}&url=${url}`;
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}
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return Response.redirect(encodeURI(share_url), 303);
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})()
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);
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} else {
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// Regular requests not related to Web Share Target.
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event.respondWith(
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fromNetwork(event.request, 10000).catch(() => fromCache(event.request))
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);
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event.waitUntil(update(event.request));
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}
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});
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// on activation, we clean up the previously registered service workers
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self.addEventListener('activate', evt =>
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evt.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 !== cacheTitle) {
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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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