211 lines
8.3 KiB
JavaScript
211 lines
8.3 KiB
JavaScript
'use strict';
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const BASE_HREF = "IIITB_Menu/";
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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 = {"index.html": "138c2d81e3bf374a775dbb0e6156efc6",
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"/": "138c2d81e3bf374a775dbb0e6156efc6",
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"canvaskit/canvaskit.js": "c86fbd9e7b17accae76e5ad116583dc4",
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"canvaskit/skwasm.js": "445e9e400085faead4493be2224d95aa",
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"canvaskit/skwasm.wasm": "e42815763c5d05bba43f9d0337fa7d84",
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"canvaskit/chromium/canvaskit.js": "43787ac5098c648979c27c13c6f804c3",
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"canvaskit/chromium/canvaskit.wasm": "f5934e694f12929ed56a671617acd254",
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"canvaskit/chromium/canvaskit.js.symbols": "4525682ef039faeb11f24f37436dca06",
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"canvaskit/canvaskit.wasm": "3d2a2d663e8c5111ac61a46367f751ac",
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"canvaskit/skwasm.js.symbols": "741d50ffba71f89345996b0aa8426af8",
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"canvaskit/skwasm.worker.js": "bfb704a6c714a75da9ef320991e88b03",
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"canvaskit/canvaskit.js.symbols": "38cba9233b92472a36ff011dc21c2c9f",
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"assets/FontManifest.json": "b77836550e77478ad0c8ce7ff8c1285d",
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"assets/fonts/MaterialIcons-Regular.otf": "9475aaef2a930073f21969ae48e78735",
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"assets/AssetManifest.bin.json": "413f261e6673879ca49ac022a0cf1186",
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"assets/assets/robotoReg.ttf": "8a36205bd9b83e03af0591a004bc97f4",
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"assets/assets/plate.png": "89fc6540c9fa9a6b95e921d105f9314d",
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"assets/AssetManifest.bin": "1d7d18549dfcb5104467a9eb461475e3",
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"assets/NOTICES": "bd38e344f93699d5f8165d1993377f09",
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"assets/shaders/ink_sparkle.frag": "ecc85a2e95f5e9f53123dcaf8cb9b6ce",
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"assets/packages/cupertino_icons/assets/CupertinoIcons.ttf": "89ed8f4e49bcdfc0b5bfc9b24591e347",
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"assets/AssetManifest.json": "274f598008a40230415aeeab3517be4a",
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"version.json": "d7fbd41faace5a7a02bb5da13e6049ec",
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"icons/favicon-16x16.png": "ad35e12ce84a4abac20afb61795a90d6",
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"icons/favicon-32x32.png": "9c90e886fef86874dad704dc4b37f8a5",
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"icons/safari-pinned-tab.svg": "6ecc28ad3037a300978a2927b7fb3d1c",
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"icons/android-chrome-512x512.png": "3c5fb92485b3737401099b1193e94001",
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"icons/apple-touch-icon.png": "03d54bae9bfc7c6bea8bc596d1c441e7",
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"icons/android-chrome-192x192.png": "80d142675305ba3cdf3bafacf172ec21",
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"icons/favicon-96x96.png": "ff924a53b1eb62b512264433643a72f0",
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"favicon.ico": "f636204ccad9374ce9047423413c6d2e",
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"manifest.json": "afd226ab6e25f82439d85dcf9262338e",
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"flutter.js": "c71a09214cb6f5f8996a531350400a9a",
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"main.dart.js": "195e51f623985bb0f764e6942e624fbf"};
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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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"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 == '' || key == BASE_HREF) {
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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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var resKey = key.replace(BASE_HREF, "");
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if (!RESOURCES[resKey]) {
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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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