Impl: whoami API

index.js

@@ -20,8 +20,12 @@ app.get("/", function (req, res) {
 });
 
 // your first API endpoint...
-app.get("/api/hello", function (req, res) {
-  res.json({ greeting: "hello API" });
+app.get("/api/whoami", (req, res) => {
+  res.json({
+    ipaddress: req.headers["cf-connecting-ip"] || req.ip,
+    language: req.headers["accept-language"],
+    software: req.headers["user-agent"],
+  });
 });
 
 // listen for requests :)