Chapter 9: Helmet samples

Chapter09/http-app/server.js

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+const http = require("http");
+
+const server = http.createServer((req, res) => {
+  secureHeaders(res);
+  res.end("Hello World!");
+});
+
+const secureHeaders = (res) => {
+  res.setHeader("X-DNS-Prefetch-Control", "off");
+  res.setHeader("Expect-CT", "max-age=0");
+  res.setHeader("X-Frame-Options", "SAMEORIGIN");
+  res.setHeader("X-Download-Options", "noopen");
+  res.setHeader("X-Content-Type-Options", "nosniff");
+  res.setHeader("X-Permitted-Cross-Domain-Policies", "none");
+  res.setHeader("Referrer-Policy", "no-referrer");
+  res.setHeader("X-XSS-Protection", "1; mode=block");
+};
+
+server.listen(3000, () => {
+  console.log("Server listening on port 3000");
+});