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206 lines
8.0 KiB
206 lines
8.0 KiB
'use strict';
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const MANIFEST = 'flutter-app-manifest';
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const TEMP = 'flutter-temp-cache';
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const CACHE_NAME = 'flutter-app-cache';
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const RESOURCES = {"canvaskit/skwasm.worker.js": "bfb704a6c714a75da9ef320991e88b03",
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"canvaskit/skwasm.js": "5d4f9263ec93efeb022bb14a3881d240",
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"canvaskit/canvaskit.wasm": "9251bb81ae8464c4df3b072f84aa969b",
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"canvaskit/canvaskit.js.symbols": "74a84c23f5ada42fe063514c587968c6",
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"canvaskit/skwasm.js.symbols": "c3c05bd50bdf59da8626bbe446ce65a3",
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"canvaskit/skwasm.wasm": "4051bfc27ba29bf420d17aa0c3a98bce",
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"canvaskit/canvaskit.js": "738255d00768497e86aa4ca510cce1e1",
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"canvaskit/chromium/canvaskit.wasm": "399e2344480862e2dfa26f12fa5891d7",
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"canvaskit/chromium/canvaskit.js.symbols": "ee7e331f7f5bbf5ec937737542112372",
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"canvaskit/chromium/canvaskit.js": "901bb9e28fac643b7da75ecfd3339f3f",
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"icons/Icon-maskable-192.png": "c457ef57daa1d16f64b27b786ec2ea3c",
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"icons/Icon-maskable-512.png": "301a7604d45b3e739efc881eb04896ea",
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"icons/Icon-512.png": "96e752610906ba2a93c65f8abe1645f1",
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"icons/Icon-192.png": "ac9a721a12bbc803b44f645561ecb1e1",
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"manifest.json": "b3e6ffc626a7ddc3a2a95f62ee423a43",
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"favicon.png": "5dcef449791fa27946b3d35ad8803796",
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"flutter_bootstrap.js": "f4b9883035a50b683b5e8316f3c0d9a9",
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"version.json": "9c336dc978923faadf6aa0ad75d0ea12",
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"index.html": "8b4cf635094f6ab948b49dd9b37ae3ed",
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"/": "8b4cf635094f6ab948b49dd9b37ae3ed",
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"main.dart.js": "5e6e0336d0bbccd7929e2b966fbd4d4d",
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"assets/AssetManifest.json": "2efbb41d7877d10aac9d091f58ccd7b9",
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"assets/packages/cupertino_icons/assets/CupertinoIcons.ttf": "e986ebe42ef785b27164c36a9abc7818",
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"assets/shaders/ink_sparkle.frag": "ecc85a2e95f5e9f53123dcaf8cb9b6ce",
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"assets/AssetManifest.bin.json": "69a99f98c8b1fb8111c5fb961769fcd8",
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"assets/fonts/MaterialIcons-Regular.otf": "30f082cdc45ffa6935fef188d36ea4cd",
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"assets/NOTICES": "d91e4eac21592abefdef2b08aeb0a62d",
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"assets/AssetManifest.bin": "693635b5258fe5f1cda720cf224f158c",
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"assets/FontManifest.json": "dc3d03800ccca4601324923c0b1d6d57",
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"flutter.js": "383e55f7f3cce5be08fcf1f3881f585c"};
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// The application shell files that are downloaded before a service worker can
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// start.
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const CORE = ["main.dart.js",
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"index.html",
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"flutter_bootstrap.js",
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"assets/AssetManifest.bin.json",
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"assets/FontManifest.json"];
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// During install, the TEMP cache is populated with the application shell files.
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self.addEventListener("install", (event) => {
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self.skipWaiting();
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return event.waitUntil(
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caches.open(TEMP).then((cache) => {
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return cache.addAll(
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CORE.map((value) => new Request(value, {'cache': 'reload'})));
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})
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);
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});
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// During activate, the cache is populated with the temp files downloaded in
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// install. If this service worker is upgrading from one with a saved
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// MANIFEST, then use this to retain unchanged resource files.
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self.addEventListener("activate", function(event) {
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return event.waitUntil(async function() {
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try {
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var contentCache = await caches.open(CACHE_NAME);
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var tempCache = await caches.open(TEMP);
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var manifestCache = await caches.open(MANIFEST);
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var manifest = await manifestCache.match('manifest');
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// When there is no prior manifest, clear the entire cache.
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if (!manifest) {
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await caches.delete(CACHE_NAME);
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contentCache = await caches.open(CACHE_NAME);
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for (var request of await tempCache.keys()) {
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var response = await tempCache.match(request);
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await contentCache.put(request, response);
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}
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await caches.delete(TEMP);
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// Save the manifest to make future upgrades efficient.
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await manifestCache.put('manifest', new Response(JSON.stringify(RESOURCES)));
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// Claim client to enable caching on first launch
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self.clients.claim();
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return;
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}
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var oldManifest = await manifest.json();
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var origin = self.location.origin;
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for (var request of await contentCache.keys()) {
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var key = request.url.substring(origin.length + 1);
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if (key == "") {
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key = "/";
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}
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// If a resource from the old manifest is not in the new cache, or if
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// the MD5 sum has changed, delete it. Otherwise the resource is left
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// in the cache and can be reused by the new service worker.
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if (!RESOURCES[key] || RESOURCES[key] != oldManifest[key]) {
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await contentCache.delete(request);
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}
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}
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// Populate the cache with the app shell TEMP files, potentially overwriting
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// cache files preserved above.
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for (var request of await tempCache.keys()) {
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var response = await tempCache.match(request);
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await contentCache.put(request, response);
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}
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await caches.delete(TEMP);
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// Save the manifest to make future upgrades efficient.
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await manifestCache.put('manifest', new Response(JSON.stringify(RESOURCES)));
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// Claim client to enable caching on first launch
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self.clients.claim();
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return;
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} catch (err) {
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// On an unhandled exception the state of the cache cannot be guaranteed.
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console.error('Failed to upgrade service worker: ' + err);
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await caches.delete(CACHE_NAME);
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await caches.delete(TEMP);
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await caches.delete(MANIFEST);
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}
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}());
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});
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// The fetch handler redirects requests for RESOURCE files to the service
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// worker cache.
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self.addEventListener("fetch", (event) => {
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if (event.request.method !== 'GET') {
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return;
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}
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var origin = self.location.origin;
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var key = event.request.url.substring(origin.length + 1);
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// Redirect URLs to the index.html
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if (key.indexOf('?v=') != -1) {
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key = key.split('?v=')[0];
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}
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if (event.request.url == origin || event.request.url.startsWith(origin + '/#') || key == '') {
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key = '/';
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}
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// If the URL is not the RESOURCE list then return to signal that the
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// browser should take over.
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if (!RESOURCES[key]) {
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return;
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}
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// If the URL is the index.html, perform an online-first request.
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if (key == '/') {
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return onlineFirst(event);
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}
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event.respondWith(caches.open(CACHE_NAME)
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.then((cache) => {
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return cache.match(event.request).then((response) => {
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// Either respond with the cached resource, or perform a fetch and
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// lazily populate the cache only if the resource was successfully fetched.
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return response || fetch(event.request).then((response) => {
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if (response && Boolean(response.ok)) {
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cache.put(event.request, response.clone());
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}
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return response;
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});
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})
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})
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);
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});
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self.addEventListener('message', (event) => {
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// SkipWaiting can be used to immediately activate a waiting service worker.
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// This will also require a page refresh triggered by the main worker.
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if (event.data === 'skipWaiting') {
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self.skipWaiting();
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return;
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}
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if (event.data === 'downloadOffline') {
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downloadOffline();
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return;
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}
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});
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// Download offline will check the RESOURCES for all files not in the cache
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// and populate them.
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async function downloadOffline() {
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var resources = [];
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var contentCache = await caches.open(CACHE_NAME);
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var currentContent = {};
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for (var request of await contentCache.keys()) {
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var key = request.url.substring(origin.length + 1);
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if (key == "") {
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key = "/";
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}
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currentContent[key] = true;
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}
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for (var resourceKey of Object.keys(RESOURCES)) {
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if (!currentContent[resourceKey]) {
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resources.push(resourceKey);
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}
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}
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return contentCache.addAll(resources);
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}
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// Attempt to download the resource online before falling back to
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// the offline cache.
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function onlineFirst(event) {
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return event.respondWith(
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fetch(event.request).then((response) => {
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return caches.open(CACHE_NAME).then((cache) => {
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cache.put(event.request, response.clone());
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return response;
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});
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}).catch((error) => {
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return caches.open(CACHE_NAME).then((cache) => {
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return cache.match(event.request).then((response) => {
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if (response != null) {
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return response;
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}
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throw error;
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});
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});
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})
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);
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}
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