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// Caution! Be sure you understand the caveats before publishing an application with
// offline support. See https://aka.ms/blazor-offline-considerations
self.importScripts('./service-worker-assets.js');
self.addEventListener('install', event => event.waitUntil(onInstall(event)));
self.addEventListener('activate', event => event.waitUntil(onActivate(event)));
self.addEventListener('fetch', event => event.respondWith(onFetch(event)));
const cacheNamePrefix = 'offline-cache-';
const cacheName = `${cacheNamePrefix}${self.assetsManifest.version}`;
const offlineAssetsInclude = [ /\.dll$/, /\.pdb$/, /\.wasm/, /\.html/, /\.js$/, /\.json$/, /\.css$/, /\.woff$/, /\.png$/, /\.jpe?g$/, /\.gif$/, /\.ico$/, /\.blat$/, /\.dat$/ ];
const offlineAssetsExclude = [ /^service-worker\.js$/ ];
async function onInstall(event) {
console.info('Service worker: Install');
// Fetch and cache all matching items from the assets manifest
const assetsRequests = self.assetsManifest.assets
.filter(asset => offlineAssetsInclude.some(pattern => pattern.test(asset.url)))
.filter(asset => !offlineAssetsExclude.some(pattern => pattern.test(asset.url)))
.map(asset => new Request(asset.url, { integrity: asset.hash, cache: 'no-cache' }));
//#if(Hosted)
// Also cache authentication configuration
assetsRequests.push(new Request('_configuration/EmptyComponentsWebAssembly-CSharp.Client'));
//#endif
await caches.open(cacheName).then(cache => cache.addAll(assetsRequests));
}
async function onActivate(event) {
console.info('Service worker: Activate');
// Delete unused caches
const cacheKeys = await caches.keys();
await Promise.all(cacheKeys
.filter(key => key.startsWith(cacheNamePrefix) && key !== cacheName)
.map(key => caches.delete(key)));
}
async function onFetch(event) {
let cachedResponse = null;
if (event.request.method === 'GET') {
// For all navigation requests, try to serve index.html from cache
// If you need some URLs to be server-rendered, edit the following check to exclude those URLs
//#if(Hosted)
const shouldServeIndexHtml = event.request.mode === 'navigate'
&& !event.request.url.includes('/connect/')
//#else
const shouldServeIndexHtml = event.request.mode === 'navigate';
//#endif
const request = shouldServeIndexHtml ? 'index.html' : event.request;
const cache = await caches.open(cacheName);
cachedResponse = await cache.match(request);
}
return cachedResponse || fetch(event.request);
}
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