105 lines
2.7 KiB
JavaScript
105 lines
2.7 KiB
JavaScript
const pre_cache_file_version = "pre-v1.1.0";
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const auto_cache_file_version = "auto-v1.1.0";
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const ASSETS = [
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"/images/lifeadventurer-192x192.png",
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"/images/lifeadventurer-512x512.png",
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"/images/lifeadventurer-180x180.png",
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"/images/lifeadventurer-270x270.png",
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"/images/lifeadventurer.jpg",
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"https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css",
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"https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js",
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];
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const NEED_UPDATE = [
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"/fortune_generator/",
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"/fortune_generator/index.html",
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"/fortune_generator/css/styles.css",
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"/fortune_generator/js/fortune.js",
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"/fortune_generator/js/matrix.js",
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"/fortune_generator/json/special.json",
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"/fortune_generator/json/fortune.json",
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"/fortune_generator/json/manifest.json",
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"https://api.ipify.org/?format=json",
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];
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const limit_cache_size = (name, size) => {
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caches.open(name).then((cache) => {
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cache.keys().then((keys) => {
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if (keys.length > size) {
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cache.delete(keys[0]).then(() => {
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limit_cache_size(name, size);
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});
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}
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});
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});
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};
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const is_in_array = (str, array) => {
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let path = "";
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// Check the request's domain is the same as the current domain.
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if (str.indexOf(self.origin) === 0) {
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path = str.substring(self.origin.length); // Remove https://lifeadventurer.github.io
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} else {
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path = str; // outside request
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}
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return array.indexOf(path) > -1;
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};
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// install
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self.addEventListener("install", (event) => {
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self.skipWaiting();
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//pre-cache files
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event.waitUntil(
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caches.open(pre_cache_file_version).then((cache) => {
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cache.addAll(ASSETS);
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}),
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);
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});
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// activate
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self.addEventListener("activate", (event) => {
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event.waitUntil(
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caches.keys().then((keys) => {
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return Promise.all(keys.map((key) => {
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if (
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pre_cache_file_version.indexOf(key) === -1 &&
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auto_cache_file_version.indexOf(key) === -1
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) {
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return caches.delete(key);
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}
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}));
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}),
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);
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});
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// fetch event
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self.addEventListener("fetch", (event) => {
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if (is_in_array(event.request.url, ASSETS)) {
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// cache only strategy
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event.respondWith(
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caches.match(event.request.url),
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);
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} else if (is_in_array(event.request.url, NEED_UPDATE)) {
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event.respondWith(
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fetch(event.request.url).then(async (response) => {
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if (response.ok) {
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const cache = await caches.open(auto_cache_file_version);
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cache.put(event.request.url, response.clone());
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return response;
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}
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throw new Error("Network response was not ok.");
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}).catch(async (_error) => {
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const cache = await caches.open(auto_cache_file_version);
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return cache.match(event.request.url);
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}),
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);
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}
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});
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