Node.js HTTP Server

const http = require("http");

const server = http.createServer((req, res) => {
  if (req.url === "/hello") {
    res.writeHead(200, { "Content-Type": "text/plain" });
    res.end("Hello, client!");
  } else if (req.url === "/json") {
    res.writeHead(200, { "Content-Type": "application/json" });
    res.end(JSON.stringify({ ok: true, path: req.url, method: req.method }));
  } else {
    res.writeHead(404);
    res.end("Not found");
  }
});

server.listen(0, async () => {
  const port = server.address().port;
  for (const path of ["/hello", "/json", "/missing"]) {
    const r = await fetch(`http://localhost:${port}${path}`);
    console.log(r.status, await r.text());
  }
  server.close();
});

200 Hello, client!
200 {"ok":true,"path":"/json","method":"GET"}
404 Not found