initial commit

workers/analytics/index.js

@@ -0,0 +1,40 @@
+const scriptName = "/js/script.js";
+const endpoint = "/api/event";
+
+addEventListener("fetch", (event) => {
+  event.passThroughOnException();
+  event.respondWith(handleRequest(event));
+});
+
+async function handleRequest(event) {
+  const url = new URL(event.request.url);
+  const pathname = url.pathname;
+
+  if (pathname === scriptName) {
+    return getScript(event);
+  } else if (pathname === endpoint) {
+    return postData(event);
+  }
+  return new Response(null, { status: 404 });
+}
+
+async function getScript(event) {
+  const cache = caches.default;
+  let response = await cache.match(event.request);
+
+  if (!response) {
+    const scriptUrl =
+      "https://plausible.io/js/plausible.outbound-links.tagged-events.js";
+    response = await fetch(scriptUrl);
+    if (response.ok)
+      event.waitUntil(cache.put(event.request, response.clone()));
+  }
+
+  return response;
+}
+
+async function postData(event) {
+  const request = new Request(event.request);
+  request.headers.delete("cookie");
+  return await fetch("https://plausible.io/api/event", request);
+}