text: const http = require("http");
  
  const hostname = "127.0.0.1";
  const port = 3000;
  
  const server = http.createServer((req, res) => {
    res.statusCode = 200;
    res.setHeader("Content-Type", "text/plain");
    res.end("bcbcbcbcbc\n");
  });
  
  server.listen(port, hostname, () => {
    console.log(`服务器运行在 http://${hostname}:${port}/`);
  });
  