web/flutter_service_worker.js
'use strict';
const MANIFEST = 'flutter-app-manifest';
const TEMP = 'flutter-temp-cache';
const CACHE_NAME = 'flutter-app-cache';
const RESOURCES = {
"version.json": "351852e4eaaddf35b79da94d3bda0ca8",
"index.html": "49b054a3585ca99c8a529a318690e093",
"/": "49b054a3585ca99c8a529a318690e093",
"main.dart.js": "278c3df7c5d69109959c9743c20426bf",
"assets/AssetManifest.json": "de83a63d1426e5090f702bf824873f38",
"assets/NOTICES": "93fd72cb0204dbf68b5a181d611f7a79",
"assets/pubspec.yaml": "89b6191c4f657f403b31a9c09af96742",
"assets/FontManifest.json": "59deb22468fa7f3abe626f062d7258be",
"assets/packages/cupertino_icons/assets/CupertinoIcons.ttf": "115e937bb829a890521f72d2e664b632",
"assets/packages/flutter_vector_icons/fonts/Fontisto.ttf": "b49ae8ab2dbccb02c4d11caaacf09eab",
"assets/packages/flutter_vector_icons/fonts/Octicons.ttf": "8e7f807ef943bff1f6d3c2c6e0f3769e",
"assets/packages/flutter_vector_icons/fonts/Feather.ttf": "ca9ce9ff0676a9b04ef0f8a3ad17dd08",
"assets/packages/flutter_vector_icons/fonts/Entypo.ttf": "744ce60078c17d86006dd0edabcd59a7",
"assets/packages/flutter_vector_icons/fonts/FontAwesome5_Brands.ttf": "c39278f7abfc798a241551194f55e29f",
"assets/packages/flutter_vector_icons/fonts/MaterialCommunityIcons.ttf": "3c851d60ad5ef3f2fe43ebd263490d78",
"assets/packages/flutter_vector_icons/fonts/AntDesign.ttf": "3a2ba31570920eeb9b1d217cabe58315",
"assets/packages/flutter_vector_icons/fonts/Foundation.ttf": "e20945d7c929279ef7a6f1db184a4470",
"assets/packages/flutter_vector_icons/fonts/Ionicons.ttf": "b2e0fc821c6886fb3940f85a3320003e",
"assets/packages/flutter_vector_icons/fonts/FontAwesome5_Solid.ttf": "b70cea0339374107969eb53e5b1f603f",
"assets/packages/flutter_vector_icons/fonts/FontAwesome5_Regular.ttf": "f6c6f6c8cb7784254ad00056f6fbd74e",
"assets/packages/flutter_vector_icons/fonts/FontAwesome.ttf": "b06871f281fee6b241d60582ae9369b9",
"assets/packages/flutter_vector_icons/fonts/Zocial.ttf": "5cdf883b18a5651a29a4d1ef276d2457",
"assets/packages/flutter_vector_icons/fonts/EvilIcons.ttf": "140c53a7643ea949007aa9a282153849",
"assets/packages/flutter_vector_icons/fonts/SimpleLineIcons.ttf": "d2285965fe34b05465047401b8595dd0",
"assets/packages/flutter_vector_icons/fonts/MaterialIcons.ttf": "a37b0c01c0baf1888ca812cc0508f6e2",
"assets/packages/flutter_transmission/assets/images/turtle.svg": "063ba31cf386b0d5197b8ba6670a7895",
"assets/fonts/MaterialIcons-Regular.otf": "1288c9e28052e028aba623321f7826ac",
"assets/assets/images/bg_login_portrait.jpg": "ce5b6db560e4a7459f919e0ba8e8e8a6",
"assets/assets/images/bg_login_landscape.jpg": "fd6a86ecce87e769d1f1f0b48f94a212",
"assets/assets/images/lisa.png": "e7b686d15f157699088057e982df72f5",
"assets/assets/images/logo.png": "2fd25730be5e7c51553602ba88205837",
"assets/assets/fonts/Raleway-SemiBold.ttf": "6ec58d1ea836b7ef69f94ea6770972a3",
"assets/assets/fonts/Raleway-Regular.ttf": "84abe14c9756256a4b91300ba3e4ec62",
"assets/assets/fonts/Raleway-Italic.ttf": "e97be495a4a423cf1dd376b9becca841",
"assets/assets/fonts/Raleway-Bold.ttf": "2f99a85426a45e0c7f8707aae53af803",
"assets/assets/animations/AudioWave.flr": "6d3be0d072c593cb1468b9a4eb7229ff",
"assets/assets/animations/intro.flr": "9a2835b4cf6ccc59fa7e1083cb7e9846"
};
// The application shell files that are downloaded before a service worker can
// start.
const CORE = [
"/",
"main.dart.js",
"index.html",
"assets/NOTICES",
"assets/AssetManifest.json",
"assets/FontManifest.json"];
// During install, the TEMP cache is populated with the application shell files.
self.addEventListener("install", (event) => {
self.skipWaiting();
return event.waitUntil(
caches.open(TEMP).then((cache) => {
return cache.addAll(
CORE.map((value) => new Request(value + '?revision=' + RESOURCES[value], {'cache': 'reload'})));
})
);
});
// During activate, the cache is populated with the temp files downloaded in
// install. If this service worker is upgrading from one with a saved
// MANIFEST, then use this to retain unchanged resource files.
self.addEventListener("activate", function(event) {
return event.waitUntil(async function() {
try {
var contentCache = await caches.open(CACHE_NAME);
var tempCache = await caches.open(TEMP);
var manifestCache = await caches.open(MANIFEST);
var manifest = await manifestCache.match('manifest');
// When there is no prior manifest, clear the entire cache.
if (!manifest) {
await caches.delete(CACHE_NAME);
contentCache = await caches.open(CACHE_NAME);
for (var request of await tempCache.keys()) {
var response = await tempCache.match(request);
await contentCache.put(request, response);
}
await caches.delete(TEMP);
// Save the manifest to make future upgrades efficient.
await manifestCache.put('manifest', new Response(JSON.stringify(RESOURCES)));
return;
}
var oldManifest = await manifest.json();
var origin = self.location.origin;
for (var request of await contentCache.keys()) {
var key = request.url.substring(origin.length + 1);
if (key == "") {
key = "/";
}
// If a resource from the old manifest is not in the new cache, or if
// the MD5 sum has changed, delete it. Otherwise the resource is left
// in the cache and can be reused by the new service worker.
if (!RESOURCES[key] || RESOURCES[key] != oldManifest[key]) {
await contentCache.delete(request);
}
}
// Populate the cache with the app shell TEMP files, potentially overwriting
// cache files preserved above.
for (var request of await tempCache.keys()) {
var response = await tempCache.match(request);
await contentCache.put(request, response);
}
await caches.delete(TEMP);
// Save the manifest to make future upgrades efficient.
await manifestCache.put('manifest', new Response(JSON.stringify(RESOURCES)));
return;
} catch (err) {
// On an unhandled exception the state of the cache cannot be guaranteed.
console.error('Failed to upgrade service worker: ' + err);
await caches.delete(CACHE_NAME);
await caches.delete(TEMP);
await caches.delete(MANIFEST);
}
}());
});
// The fetch handler redirects requests for RESOURCE files to the service
// worker cache.
self.addEventListener("fetch", (event) => {
if (event.request.method !== 'GET') {
return;
}
var origin = self.location.origin;
var key = event.request.url.substring(origin.length + 1);
// Redirect URLs to the index.html
if (key.indexOf('?v=') != -1) {
key = key.split('?v=')[0];
}
if (event.request.url == origin || event.request.url.startsWith(origin + '/#') || key == '') {
key = '/';
}
// If the URL is not the RESOURCE list then return to signal that the
// browser should take over.
if (!RESOURCES[key]) {
return;
}
// If the URL is the index.html, perform an online-first request.
if (key == '/') {
return onlineFirst(event);
}
event.respondWith(caches.open(CACHE_NAME)
.then((cache) => {
return cache.match(event.request).then((response) => {
// Either respond with the cached resource, or perform a fetch and
// lazily populate the cache.
return response || fetch(event.request).then((response) => {
cache.put(event.request, response.clone());
return response;
});
})
})
);
});
self.addEventListener('message', (event) => {
// SkipWaiting can be used to immediately activate a waiting service worker.
// This will also require a page refresh triggered by the main worker.
if (event.data === 'skipWaiting') {
self.skipWaiting();
return;
}
if (event.data === 'downloadOffline') {
downloadOffline();
return;
}
});
// Download offline will check the RESOURCES for all files not in the cache
// and populate them.
async function downloadOffline() {
var resources = [];
var contentCache = await caches.open(CACHE_NAME);
var currentContent = {};
for (var request of await contentCache.keys()) {
var key = request.url.substring(origin.length + 1);
if (key == "") {
key = "/";
}
currentContent[key] = true;
}
for (var resourceKey of Object.keys(RESOURCES)) {
if (!currentContent[resourceKey]) {
resources.push(resourceKey);
}
}
return contentCache.addAll(resources);
}
// Attempt to download the resource online before falling back to
// the offline cache.
function onlineFirst(event) {
return event.respondWith(
fetch(event.request).then((response) => {
return caches.open(CACHE_NAME).then((cache) => {
cache.put(event.request, response.clone());
return response;
});
}).catch((error) => {
return caches.open(CACHE_NAME).then((cache) => {
return cache.match(event.request).then((response) => {
if (response != null) {
return response;
}
throw error;
});
});
})
);
}