85 lines
2.9 KiB
JavaScript
85 lines
2.9 KiB
JavaScript
// This service worker is required to expose an exported Godot project as a
|
|
// Progressive Web App. It provides an offline fallback page telling the user
|
|
// that they need an Internet connection to run the project if desired.
|
|
// Incrementing CACHE_VERSION will kick off the install event and force
|
|
// previously cached resources to be updated from the network.
|
|
const CACHE_VERSION = "@GODOT_VERSION@";
|
|
const CACHE_NAME = "@GODOT_NAME@-cache";
|
|
const OFFLINE_URL = "offline.html";
|
|
// Files that will be cached on load.
|
|
const CACHED_FILES = [
|
|
"godot.tools.html",
|
|
"offline.html",
|
|
"godot.tools.js",
|
|
"godot.tools.worker.js",
|
|
"godot.tools.audio.worklet.js",
|
|
"logo.svg",
|
|
"favicon.png",
|
|
];
|
|
|
|
// Files that we might not want the user to preload, and will only be cached on first load.
|
|
const CACHABLE_FILES = [
|
|
"godot.tools.wasm",
|
|
];
|
|
const FULL_CACHE = CACHED_FILES.concat(CACHABLE_FILES);
|
|
|
|
self.addEventListener("install", (event) => {
|
|
event.waitUntil(async function () {
|
|
const cache = await caches.open(CACHE_NAME);
|
|
// Clear old cache (including optionals).
|
|
await Promise.all(FULL_CACHE.map(path => cache.delete(path)));
|
|
// Insert new one.
|
|
const done = await cache.addAll(CACHED_FILES);
|
|
return done;
|
|
}());
|
|
});
|
|
|
|
self.addEventListener("activate", (event) => {
|
|
event.waitUntil(async function () {
|
|
if ("navigationPreload" in self.registration) {
|
|
await self.registration.navigationPreload.enable();
|
|
}
|
|
}());
|
|
// Tell the active service worker to take control of the page immediately.
|
|
self.clients.claim();
|
|
});
|
|
|
|
self.addEventListener("fetch", (event) => {
|
|
const isNavigate = event.request.mode === "navigate";
|
|
const url = event.request.url || "";
|
|
const referrer = event.request.referrer || "";
|
|
const base = referrer.slice(0, referrer.lastIndexOf("/") + 1);
|
|
const local = url.startsWith(base) ? url.replace(base, "") : "";
|
|
const isCachable = FULL_CACHE.some(v => v === local) || (base === referrer && base.endsWith(CACHED_FILES[0]));
|
|
if (isNavigate || isCachable) {
|
|
event.respondWith(async function () {
|
|
try {
|
|
// Use the preloaded response, if it's there
|
|
let request = event.request.clone();
|
|
let response = await event.preloadResponse;
|
|
if (!response) {
|
|
// Or, go over network.
|
|
response = await fetch(event.request);
|
|
}
|
|
if (isCachable) {
|
|
// Update the cache
|
|
const cache = await caches.open(CACHE_NAME);
|
|
cache.put(request, response.clone());
|
|
}
|
|
return response;
|
|
} catch (error) {
|
|
const cache = await caches.open(CACHE_NAME);
|
|
if (event.request.mode === "navigate") {
|
|
// Check if we have full cache.
|
|
const cached = await Promise.all(FULL_CACHE.map(name => cache.match(name)));
|
|
const missing = cached.some(v => v === undefined);
|
|
const cachedResponse = missing ? await caches.match(OFFLINE_URL) : await caches.match(CACHED_FILES[0]);
|
|
return cachedResponse;
|
|
}
|
|
const cachedResponse = await caches.match(event.request);
|
|
return cachedResponse;
|
|
}
|
|
}());
|
|
}
|
|
});
|