220 lines
8.5 KiB
JavaScript
220 lines
8.5 KiB
JavaScript
'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 = {
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"assets/AssetManifest.json": "7ceda6dd13738309d0b4d4d2702b3010",
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"assets/assets/animations/MDLF_animation.flr": "5151e91ce20a70dbc097f01a7ec97497",
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"assets/assets/files/session.json": "d41d8cd98f00b204e9800998ecf8427e",
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"assets/FontManifest.json": "dc3d03800ccca4601324923c0b1d6d57",
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"assets/fonts/MaterialIcons-Regular.otf": "4e6447691c9509f7acdbf8a931a85ca1",
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"assets/NOTICES": "838205c3fa2fbd0319ce48d7c8347af6",
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"assets/packages/cupertino_icons/assets/CupertinoIcons.ttf": "6d342eb68f170c97609e9da345464e5e",
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"favicon.png": "5dcef449791fa27946b3d35ad8803796",
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"icons/android-icon-144x144.png": "25849c1de85e1ac87dfde295a6c97dfe",
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"icons/android-icon-192x192.png": "2f38b513d97a00ddf494059260c193b5",
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"icons/android-icon-36x36.png": "5317b23569b5976037738ae5dec04859",
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"icons/android-icon-48x48.png": "1f7a48a32ed8b3d4c1e6fa7734534fc7",
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"icons/android-icon-72x72.png": "6db0636ec0c228480197e362f3f32fe5",
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"icons/android-icon-96x96.png": "d925090c0a2f6b1a24078a8640fb18e4",
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"icons/apple-icon-114x114.png": "ddd67f65d43fb30b64ebf7b3ff702427",
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"icons/apple-icon-120x120.png": "b6bee39cb32e80068c5e1e87c600ffbc",
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"icons/apple-icon-144x144.png": "25849c1de85e1ac87dfde295a6c97dfe",
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"icons/apple-icon-152x152.png": "42b1ae2dedce452961803388468d6eae",
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"icons/apple-icon-180x180.png": "17655db1c0eaff334ff6208d302a576a",
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"icons/apple-icon-57x57.png": "ffd9c2b4dfe93b5874edbef7a3829495",
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"icons/apple-icon-60x60.png": "5984c1c3aca2b357f604855446cf30f5",
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"icons/apple-icon-72x72.png": "6db0636ec0c228480197e362f3f32fe5",
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"icons/apple-icon-76x76.png": "45bb7aabc4d7211f0ee13c77e6300ec4",
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"icons/apple-icon-precomposed.png": "9cd7f52d632b4bb32f3b701eed4ec663",
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"icons/apple-icon.png": "9cd7f52d632b4bb32f3b701eed4ec663",
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"icons/browserconfig.xml": "653d077300a12f09a69caeea7a8947f8",
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"icons/favicon-16x16.png": "4fca1fd9f6c90305df787a99fe7abf62",
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"icons/favicon-32x32.png": "e78cf52bb5861c5829d6f2b63e0f703e",
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"icons/favicon-96x96.png": "91b367951bf21712259a3aa598456d29",
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"icons/favicon.ico": "941f61fe5dd76ff538f9fd9456705d7a",
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"icons/Icon-192.png": "ac9a721a12bbc803b44f645561ecb1e1",
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"icons/Icon-512.png": "96e752610906ba2a93c65f8abe1645f1",
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"icons/manifest.json": "b58fcfa7628c9205cb11a1b2c3e8f99a",
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"icons/ms-icon-144x144.png": "7f185a22f8c85fb7ccd97cd7711214e5",
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"icons/ms-icon-150x150.png": "5e33aababf68472e0bcc89c752e33fec",
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"icons/ms-icon-310x310.png": "9eace62e32aec3853604ae2919eca0ea",
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"icons/ms-icon-70x70.png": "6720855c40d6a5ba6cd4a384605fc270",
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"index.html": "b934f3f00758439d39e79bff55598ca7",
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"/": "b934f3f00758439d39e79bff55598ca7",
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"main.dart.js": "d92d406acbbcdeb9b4675562b75a0cd3",
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"manifest.json": "2ea69ab3cf494be775c9c65d32512a45",
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"version.json": "c659aa18797537bf2ce076aa3126b86e"
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};
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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 = [
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"/",
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"main.dart.js",
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"index.html",
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"assets/NOTICES",
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"assets/AssetManifest.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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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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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.
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return response || fetch(event.request).then((response) => {
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cache.put(event.request, response.clone());
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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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