Merge pull request #3 from ZXY101/service-worker

Service worker test
2023-09-25 10:29:59 +02:00
parent 2efa4fb7a1 014452f715
commit 3b75f69b8f
3 changed files with 74 additions and 0 deletions
--- a/src/app.html
+++ b/src/app.html
@@ -3,6 +3,7 @@
  <head>
    <meta charset="utf-8" />
    <link rel="icon" href="%sveltekit.assets%/favicon.png" />
+    <link rel="manifest" crossorigin="use-credentials" href="manifest.json">
    <meta
      name="viewport"
      content="width=device-width, height=device-height,initial-scale=1, minimum-scale=1, user-scalable=no"
--- a/src/service-worker.js
+++ b/src/service-worker.js
@@ -0,0 +1,62 @@
+/// <reference types="@sveltejs/kit" />
+import { build, files, version } from '$service-worker';
+
+// Create a unique cache name for this deployment
+const CACHE = `cache-${version}`;
+
+const ASSETS = [
+  ...build, // the app itself
+  ...files  // everything in `static`
+];
+
+self.addEventListener('install', (event) => {
+  // Create a new cache and add all files to it
+  async function addFilesToCache() {
+    const cache = await caches.open(CACHE);
+    await cache.addAll(ASSETS);
+  }
+
+  event.waitUntil(addFilesToCache());
+});
+
+self.addEventListener('activate', (event) => {
+  // Remove previous cached data from disk
+  async function deleteOldCaches() {
+    for (const key of await caches.keys()) {
+      if (key !== CACHE) await caches.delete(key);
+    }
+  }
+
+  event.waitUntil(deleteOldCaches());
+});
+
+self.addEventListener('fetch', (event) => {
+  // ignore POST requests etc
+  if (event.request.method !== 'GET') return;
+
+  async function respond() {
+    const url = new URL(event.request.url);
+    const cache = await caches.open(CACHE);
+
+    // `build`/`files` can always be served from the cache
+    if (ASSETS.includes(url.pathname)) {
+      return cache.match(url.pathname);
+    }
+
+    // for everything else, try the network first, but
+    // fall back to the cache if we're offline
+    try {
+      const response = await fetch(event.request);
+
+      if (response.status === 200) {
+        cache.put(event.request, response.clone());
+      }
+
+      return response;
+    } catch {
+      return cache.match(event.request);
+    }
+  }
+
+  event.respondWith(respond());
+});
--- a/static/manifest.json
+++ b/static/manifest.json
@@ -0,0 +1,11 @@
+{
+  "name": "Mokuro Reader",
+  "short_name": "Mokuro",
+  "icons": [],
+  "start_url": "/",
+  "background_color": "#0d0d0f",
+  "display": "standalone",
+  "scope": "/",
+  "theme_color": "#0d0d0f",
+  "description": "Reader for Mokuro processed manga"
+}