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randogoth 2025-02-19 10:50:16 +02:00
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docs/flutter_service_worker.js Normal file
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'use strict';
const MANIFEST = 'flutter-app-manifest';
const TEMP = 'flutter-temp-cache';
const CACHE_NAME = 'flutter-app-cache';
const RESOURCES = {"canvaskit/canvaskit.js": "26eef3024dbc64886b7f48e1b6fb05cf",
"canvaskit/canvaskit.js.symbols": "efc2cd87d1ff6c586b7d4c7083063a40",
"canvaskit/canvaskit.wasm": "e7602c687313cfac5f495c5eac2fb324",
"canvaskit/chromium/canvaskit.js": "b7ba6d908089f706772b2007c37e6da4",
"canvaskit/chromium/canvaskit.js.symbols": "e115ddcfad5f5b98a90e389433606502",
"canvaskit/chromium/canvaskit.wasm": "ea5ab288728f7200f398f60089048b48",
"canvaskit/skwasm.js": "ac0f73826b925320a1e9b0d3fd7da61c",
"canvaskit/skwasm.js.symbols": "96263e00e3c9bd9cd878ead867c04f3c",
"canvaskit/skwasm.wasm": "828c26a0b1cc8eb1adacbdd0c5e8bcfa",
"canvaskit/skwasm.worker.js": "89990e8c92bcb123999aa81f7e203b1c",
"flutter.js": "4b2350e14c6650ba82871f60906437ea",
"flutter_bootstrap.js": "4a64535ab9dec44ba990bdf12fa910e9",
"index.html": "53b1c2166ddfa53bc03a5e177e7fe7f5",
"/": "53b1c2166ddfa53bc03a5e177e7fe7f5",
"main.dart.js": "fb11aa29022963f1f4fb52bcc739ec47",
"version.json": "51548f6c0a8f6ffbd43480dcb61be70b",
"assets/packages/cupertino_icons/assets/CupertinoIcons.ttf": "e986ebe42ef785b27164c36a9abc7818",
"assets/packages/flutter_map/lib/assets/flutter_map_logo.png": "208d63cc917af9713fc9572bd5c09362",
"assets/fonts/MaterialIcons-Regular.otf": "7d779b4b996bcc13a26c58f29cdc9007",
"assets/shaders/ink_sparkle.frag": "ecc85a2e95f5e9f53123dcaf8cb9b6ce",
"assets/AssetManifest.json": "96d47c011a5a5aa71f9631b60049eb4e",
"assets/AssetManifest.bin": "a53491ba33870e68dce7c820b0867cda",
"assets/NOTICES": "6e120fb076df11f63fa7d04fac4ccab9",
"assets/AssetManifest.bin.json": "bb5daa477ab092a8c1a34a960dc05d3a",
"assets/FontManifest.json": "dc3d03800ccca4601324923c0b1d6d57",
"favicon.png": "5dcef449791fa27946b3d35ad8803796",
"icons/Icon-maskable-512.png": "301a7604d45b3e739efc881eb04896ea",
"icons/Icon-512.png": "96e752610906ba2a93c65f8abe1645f1",
"icons/Icon-maskable-192.png": "c457ef57daa1d16f64b27b786ec2ea3c",
"icons/Icon-192.png": "ac9a721a12bbc803b44f645561ecb1e1",
"manifest.json": "4fec8e675075b36b93af7202f8b58dc2"};
// The application shell files that are downloaded before a service worker can
// start.
const CORE = ["main.dart.js",
"index.html",
"flutter_bootstrap.js",
"assets/AssetManifest.bin.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, {'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)));
// Claim client to enable caching on first launch
self.clients.claim();
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)));
// Claim client to enable caching on first launch
self.clients.claim();
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 only if the resource was successfully fetched.
return response || fetch(event.request).then((response) => {
if (response && Boolean(response.ok)) {
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;
});
});
})
);
}