Make the Blazor Wasm sample site be able to test PWA

SampleSites/Client/SampleSite.Client.csproj

@@ -4,6 +4,7 @@
     <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <ServiceWorkerAssetsManifest>service-worker-assets.js</ServiceWorkerAssetsManifest>
   </PropertyGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net6.0' ">
@@ -26,8 +27,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <!--<PackageReference Include="System.Net.Http.Json" Version="5.0.0" />-->
     <ProjectReference Include="..\Components\SampleSite.Components.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ServiceWorker Include="wwwroot\service-worker.js" PublishedContent="wwwroot\service-worker.published.js" />
+  </ItemGroup>
+
 </Project>

SampleSites/Client/wwwroot/index.html

@@ -8,7 +8,10 @@
     <meta name="description" content="This is the demonstration site of the class library that provides gamepad API access for your Blazor apps." />
     <meta name="keywords" content="blazor,gamepad" />
     <base href="/" />
+    <link rel="manifest" href="manifest.webmanifest" />
     <link rel="icon" href="./_content/SampleSite.Components/nupkg-icon.png" />
+    <link rel="apple-touch-icon" sizes="512x512" href="icon-512.png" />
+    <link rel="apple-touch-icon" sizes="192x192" href="icon-192.png" />
     <link rel="stylesheet" href="css/blazor-ui.css" />
     <link rel="stylesheet" href="_content/SampleSite.Components/styles.css" />
 </head>
@@ -30,6 +33,7 @@
 
     <script src="_framework/blazor.webassembly.js"></script>
     <!--<script src="_content/Toolbelt.Blazor.Gamepad/script.min.js"></script>-->
+    <script>navigator.serviceWorker.register('service-worker.js');</script>
 </body>
 
 </html>

SampleSites/Client/wwwroot/manifest.webmanifest

@@ -0,0 +1,22 @@
+{
+  "name": "Blazor Gamepad Sample App",
+  "short_name": "Blazor Gamepad",
+  "id": "./",
+  "start_url": "./",
+  "display": "standalone",
+  "background_color": "#ffffff",
+  "theme_color": "#03173d",
+  "prefer_related_applications": false,
+  "icons": [
+    {
+      "src": "icon-512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    },
+    {
+      "src": "icon-192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    }
+  ]
+}

SampleSites/Client/wwwroot/service-worker.js

@@ -0,0 +1,4 @@
+// In development, always fetch from the network and do not enable offline support.
+// This is because caching would make development more difficult (changes would not
+// be reflected on the first load after each change).
+self.addEventListener('fetch', () => { });

SampleSites/Client/wwwroot/service-worker.published.js

@@ -0,0 +1,55 @@
+// 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$/, /\.dat$/, /\.br$/ ];
+const offlineAssetsExclude = [ /^service-worker\.js$/ ];
+
+// 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');
+
+    // 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 cache = await caches.open(cacheName);
+        cachedResponse = await cache.match(request);
+    }
+
+    return cachedResponse || fetch(event.request);
+}

SampleSites/Server/SampleSite.Server.csproj

@@ -9,4 +9,11 @@
     <ProjectReference Include="..\Components\SampleSite.Components.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Content Update="wwwroot\favicon.ico">
+      <ExcludeFromSingleFile>true</ExcludeFromSingleFile>
+      <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
+    </Content>
+  </ItemGroup>
+
 </Project>