stage 1

lib/request.ts

@@ -0,0 +1,14 @@
+import type { NextRequest } from "next/server";
+
+export function clientIp(req: NextRequest | Request): string | null {
+  const headers = "headers" in req ? req.headers : new Headers();
+  const fwd = headers.get("x-forwarded-for");
+  if (fwd) return fwd.split(",")[0]!.trim();
+  const real = headers.get("x-real-ip");
+  if (real) return real.trim();
+  return null;
+}
+
+export function userAgent(req: NextRequest | Request): string | null {
+  return req.headers.get("user-agent");
+}