refactoring-nodejs-simple-route.js

import { readFile } from "fs";

router.get("/some-file", function (req, res) {
  const url = "./data/some-file.ext";

  readFile(url, function (err, file) {
    if (err) {
      res.writeHead(404);
      res.end();
    } else {
      res.writeHead(200, { "Content-Type": "application/octet-stream" });
      res.write(file);
      res.end();
    }
  });
});