86 lines
2.6 KiB
JavaScript
86 lines
2.6 KiB
JavaScript
const CACHE_NAME = "page-cache";
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// JavaScript equivalent of TypeScript hashText function
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async function hashText(text) {
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const encoder = new TextEncoder();
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const data = encoder.encode(text);
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const hashBuffer = await crypto.subtle.digest("SHA-256", data);
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const hashArray = Array.from(new Uint8Array(hashBuffer));
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const hashHex = hashArray.map((b) => b.toString(16).padStart(2, "0")).join(
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"",
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);
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return hashHex;
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}
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// Listen for postMessage to prefetch-and-cache any specified URL
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self.addEventListener("message", async (event) => {
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const data = event.data;
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if (data && data.type === "prefetch" && data.url) {
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let prefectchSuccess = false;
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const cache = await caches.open(CACHE_NAME);
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const cachedResponse = await cache.match(data.url);
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if (cachedResponse) {
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const originalUrl = new URL(cachedResponse.url);
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const data1Url = originalUrl.toString().replace(
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"portal.cyberhybridhub.com",
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"data1.cyberhybridhub.com",
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);
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const checkData1Url = new URL(data1Url);
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checkData1Url.searchParams.set("naunce", await hashText(data.naunce));
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const checkRequest = new Request(checkData1Url, {
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method: cachedResponse.method,
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headers: cachedResponse.headers,
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credentials: "include",
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body: cachedResponse.body,
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});
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const checkResponse = await fetch(checkRequest);
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if (checkResponse.ok) {
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const cloneResponse = checkResponse.clone();
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const cloneText = await cloneResponse.text();
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if (cloneText && cloneText.length > 0) {
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await cache.put(data.url, checkResponse);
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}
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prefectchSuccess = true;
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} else {
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console.warn(
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`[Prefetch] Failed to fetch from data1: ${response.status} ${response.statusText}`,
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);
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}
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} else {
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const networkResponse = await fetch(event.request, {
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credentials: "include",
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});
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if (networkResponse.ok) {
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prefectchSuccess = true;
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await cache.put(event.request, networkResponse);
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}
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}
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if (prefectchSuccess) {
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const clients = await self.clients.matchAll();
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clients.forEach((client) =>
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client.postMessage({ type: "prefetch-complete", url: data.url })
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);
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} else {
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const clients = await self.clients.matchAll();
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clients.forEach((client) =>
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client.postMessage({
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type: "prefetch-failed",
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url: data.url,
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error: "Failed to fetch from data1",
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})
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);
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}
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}
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});
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self.addEventListener("fetch", (event) => {
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event.respondWith(fetch(event.request));
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});
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