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flutter_service_worker.js
308 lines (299 loc) · 18.2 KB
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flutter_service_worker.js
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'use strict';
const MANIFEST = 'flutter-app-manifest';
const TEMP = 'flutter-temp-cache';
const CACHE_NAME = 'flutter-app-cache';
const RESOURCES = {
".git/COMMIT_EDITMSG": "1740e6134fc11ec41a550cb3f4158068",
".git/config": "61957c0a8321548458d7851eec9f2236",
".git/description": "a0a7c3fff21f2aea3cfa1d0316dd816c",
".git/HEAD": "4cf2d64e44205fe628ddd534e1151b58",
".git/hooks/applypatch-msg.sample": "ce562e08d8098926a3862fc6e7905199",
".git/hooks/commit-msg.sample": "579a3c1e12a1e74a98169175fb913012",
".git/hooks/post-update.sample": "2b7ea5cee3c49ff53d41e00785eb974c",
".git/hooks/pre-applypatch.sample": "054f9ffb8bfe04a599751cc757226dda",
".git/hooks/pre-commit.sample": "01b1688f97f94776baae85d77b06048b",
".git/hooks/pre-push.sample": "3c5989301dd4b949dfa1f43738a22819",
".git/hooks/pre-rebase.sample": "81005745454846bb79cc3c7c0c57658d",
".git/hooks/prepare-commit-msg.sample": "7dfe15854212a30f346da5255c1d794b",
".git/hooks/update.sample": "517f14b9239689dff8bda3022ebd9004",
".git/index": "c23ddbc174988a5c3d8e4802a8136df8",
".git/info/exclude": "036208b4a1ab4a235d75c181e685e5a3",
".git/logs/HEAD": "ca291d52f59d46a916de977ca3fca9d9",
".git/logs/refs/heads/master": "55c5d633468ad359c46bffb935378fc1",
".git/logs/refs/remotes/origin/master": "33d2873af48375e7a25c410961fde3ec",
".git/objects/05/7aed0c422fee32cff4da6aa0bda82dc7d936cd": "7f9053fe265d5e935e4445746e397d08",
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"favicon.png": "fd58e36b9edf2a302bc11cc68efa0d88",
"icons/android-chrome-192x192.png": "febdf5489d90a4f21552d6a4dfd1fb4a",
"icons/android-chrome-512x512.png": "d643dbe77c48ce92dea0c9aaa40585a8",
"icons/apple-touch-icon.png": "296e8928fa81b860317a9548a36f13ca",
"icons/browserconfig.xml": "99effbcd7a7597f2340c4f91965fa15c",
"icons/favicon-16x16.png": "6f771c0e2ddea0ff40e41bf5c7a99aa6",
"icons/favicon-32x32.png": "1ac624915c7adb75b2a2bee19200430a",
"icons/favicon.ico": "ce6bbaa49e7343956436f790a80c28c9",
"icons/mstile-150x150.png": "928a5c5954a5f4f3b89b2c79317c0934",
"icons/safari-pinned-tab.svg": "d3d61d3d102c2dddf81fd402f851d049",
"icons/site.webmanifest": "35f3698d1ef7a7459be6ec9005be6466",
"index.html": "cc52bd6acead6331050488a84fbc96ef",
"/": "cc52bd6acead6331050488a84fbc96ef",
"main.dart.js": "878c05c78f6086b8c728d33d8dbe4ed5",
"manifest.json": "9ac4084ea7dfbe2a81e7ef65c5a07eac"
};
// 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) => {
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) => {
var origin = self.location.origin;
var key = event.request.url.substring(origin.length + 1);
// Redirect URLs to the index.html
if (event.request.url == origin || event.request.url.startsWith(origin + '/#')) {
key = '/';
}
// If the URL is not the RESOURCE list, skip the cache.
if (!RESOURCES[key]) {
return event.respondWith(fetch(event.request));
}
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. Ensure the resources are not cached
// by the browser for longer than the service worker expects.
var modifiedRequest = new Request(event.request, {'cache': 'reload'});
return response || fetch(modifiedRequest).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') {
return self.skipWaiting();
}
if (event.message === 'downloadOffline') {
downloadOffline();
}
});
// 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 in Object.keys(RESOURCES)) {
if (!currentContent[resourceKey]) {
resources.push(resourceKey);
}
}
return contentCache.addAll(resources);
}