Chapter 9: Malicious Input samples

Chapter09/express-input/server.js

@@ -0,0 +1,18 @@
+const express = require("express");
+const app = express();
+
+app.get("/", (req, res) => {
+  asyncWork(() => {
+    const upper = (req.query.msg || "").toUpperCase();
+    res.send(upper);
+  });
+});
+
+app.listen(3000, () => {
+  console.log("Server listening on port 3000");
+});
+
+asyncWork = (callback) => {
+  setTimeout(callback, 0);
+};
+