feat: add telemetry

packages/telemetry/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "telemetry",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "deploy": "wrangler deploy",
+    "dev": "wrangler dev",
+    "start": "wrangler dev",
+    "cf-typegen": "wrangler types"
+  },
+  "devDependencies": {
+    "@cloudflare/workers-types": "^4.20231218.0",
+    "typescript": "^5.5.2",
+    "wrangler": "^3.60.3"
+  }
+}

packages/telemetry/src/index.ts

@@ -0,0 +1,15 @@
+export default {
+  async fetch(request): Promise<Response> {
+    // https://github.com/mixpanel/tracking-proxy/blob/master/nginx.conf
+    const headers = new Headers(request.headers);
+    if (request.method !== 'POST' && request.method !== 'OPTIONS') {
+      console.log(request.headers.get('Origin'));
+      return new Response('Method Not Allowed', { status: 405 });
+    }
+    headers.set('Host', 'api-eu.mixpanel.com');
+    const res = await fetch(request, {
+      headers,
+    });
+    return res;
+  },
+} satisfies ExportedHandler<Env>;

packages/telemetry/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "./src/"
+  },
+  "include": ["./src", "worker-configuration.d.ts"],
+  "references": []
+}

packages/telemetry/worker-configuration.d.ts

@@ -0,0 +1,4 @@
+// Generated by Wrangler
+// After adding bindings to `wrangler.toml`, regenerate this interface via `npm run cf-typegen`
+interface Env {
+}

packages/telemetry/wrangler.toml

@@ -0,0 +1,3 @@
+name = "telemetry"
+main = "./src/index.ts"
+compatibility_date = "2024-07-24"