// ---------------------------------------------------------------------------// PostHog reverse proxy — the browser SDK targets a build-randomized// first-party path and we forward to PostHog's ingest + asset hosts. Keeps// events flowing past adblockers that match *.posthog.com. See// https://posthog.com/docs/advanced/proxy/cloudflare// --------------------------------------------------------------------------- import { createMiddleware } from "@tanstack/react-start"; const POSTHOG_INGEST_HOST = "us.i.posthog.com";const POSTHOG_ASSETS_HOST = "us-assets.i.posthog.com";const POSTHOG_PROXY_PATH = `/api/${(import.meta.env.VITE_PUBLIC_ANALYTICS_PATH ?? "a").replace(  /^\/+|\/+$/g,  "",)}`; export const posthogProxyMiddleware = createMiddleware({ type: "request" }).server(  ({ pathname, request, next }) => {    if (pathname !== POSTHOG_PROXY_PATH && !pathname.startsWith(`${POSTHOG_PROXY_PATH}/`)) {      return next();    }     const url = new URL(request.url);    url.hostname = pathname.startsWith(`${POSTHOG_PROXY_PATH}/static/`)      ? POSTHOG_ASSETS_HOST      : POSTHOG_INGEST_HOST;    url.protocol = "https:";    url.port = "";    url.pathname = pathname.slice(POSTHOG_PROXY_PATH.length) || "/";     const upstream = new Request(url, request);    upstream.headers.delete("cookie");    return fetch(upstream);  },);