1 files changed, 80 insertions, 0 deletions
diff --git a/BugMine.Web/wwwroot/service-worker.published.js b/BugMine.Web/wwwroot/service-worker.published.js
new file mode 100644
index 0000000..9219755
--- /dev/null
+++ b/BugMine.Web/wwwroot/service-worker.published.js
@@ -0,0 +1,80 @@
+// 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 = [// Standard resources
+    /\.dll$/, /\.pdb$/, /\.wasm/, /\.html/, /\.js$/, /\.json$/, /\.css$/, /\.woff$/, /\.png$/, /\.jpe?g$/, /\.gif$/, /\.ico$/, /\.blat$/, /\.dat$/, /* Extra known-static paths */
+    /\/_matrix\/media\/.{2}\/download\//, /api\.dicebear\.com\/6\.x\/identicon\/svg/];
+const offlineAssetsExclude = [/^service-worker\.js$/];
+
+// Replace with your base path if you are hosting on a subfolder. Ensure there is a trailing '/'.
+const base = "/";
+const baseUrl = new URL(base, self.origin);
+const manifestUrlList = self.assetsManifest.assets.map(asset => new URL(asset.url, baseUrl).href);
+
+async function onInstall(event) {
+    console.info('Service worker: Install');
+
+    // Activate the new service worker as soon as the old one is retired.
+    self.skipWaiting();
+
+    // 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'}));
+    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,
+        // unless that request is for an offline resource.
+        // If you need some URLs to be server-rendered, edit the following check to exclude those URLs
+        const shouldServeIndexHtml = event.request.mode === 'navigate' && !manifestUrlList.some(url => url === event.request.url);
+
+        const request = shouldServeIndexHtml ? 'index.html' : event.request;
+        const shouldCache = offlineAssetsInclude.some(pattern => pattern.test(request.url));
+
+        const cache = await caches.open(cacheName);
+        cachedResponse = await cache.match(request);
+        let exception;
+        let fetched;
+        if (!cachedResponse && shouldCache) {
+            console.log("Service worker caching: fetching ", request.url)
+            try {
+                fetched = true;
+                await cache.add(request);
+                cachedResponse = await cache.match(request);
+            } catch (e) {
+                exception = e;
+                console.error("cache.add error: ", e, request.url)
+            }
+        }
+        let consoleLog = {
+            fetched, shouldCache, request, exception, cachedResponse, url: request.url,
+        }
+        Object.keys(consoleLog).forEach(key => consoleLog[key] == null && delete consoleLog[key])
+        if(consoleLog.exception)
+            console.log("Service worker caching: ", consoleLog)
+    }
+
+    return cachedResponse || fetch(event.request);
+}