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Add service worker

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0d0 2025-02-07 02:22:45 +01:00
parent 1bb3fd8e6d
commit 0c8779abc5
3 changed files with 89 additions and 0 deletions
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1
src/app.html
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@ -3,6 +3,7 @@
<head> <head>
<meta charset="utf-8" /> <meta charset="utf-8" />
<link rel="icon" href="%sveltekit.assets%/favicon.png" /> <link rel="icon" href="%sveltekit.assets%/favicon.png" />
<link rel="manifest" href="manifest.json">
<meta name="viewport" content="width=device-width, initial-scale=1" /> <meta name="viewport" content="width=device-width, initial-scale=1" />
%sveltekit.head% %sveltekit.head%
<style> <style>

79
src/service-worker.js Normal file
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@ -0,0 +1,79 @@
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' || event.request.pathname === 'download') 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)) {
const response = await cache.match(url.pathname);
if (response) {
return response;
}
}
// 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 we're offline, fetch can return a value that is not a Response
// instead of throwing - and we can't pass this non-Response to respondWith
if (!(response instanceof Response)) {
throw new Error('invalid response from fetch');
}
if (response.status === 200) {
cache.put(event.request, response.clone());
}
return response;
} catch (err) {
const response = await cache.match(event.request);
if (response) {
return response;
}
// if there's no cache, then just error out
// as there is nothing we can do to respond to this request
throw err;
}
}
event.respondWith(respond());
});

9
static/manifest.json Normal file
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{
"name": "EmersaDownloader",
"start_url": "https://dl.emersa.it",
"theme_color": "rgb(34,197,94)",
"background": "black",
"orientation": "portrait",
"display": "fullscreen",
"short_name": "e-downloader"
}