如何检查node.js中的打开连接数？

const net = require('net');

const server = net.createServer();
const port = 3000; // 举例使用的端口号
server.listen(port, () => {
  console.log(`Server listening on port ${port}`);
});

let connectionCount = 0; // 记录连接数
server.on('connection', (socket) => {
  connectionCount++;
  console.log(`New connection. Total connections: ${connectionCount}`);

  // 监听连接关闭事件
  socket.on('close', () => {
    connectionCount--;
    console.log(`Connection closed. Total connections: ${connectionCount}`);
  });
});

console.log(`Current open connections: ${connectionCount}`);

const net = require('net');

const server = net.createServer();
const port = 3000; // 举例使用的端口号
let connectionCount = 0;

server.listen(port, () => {
  console.log(`Server listening on port ${port}`);
});

server.on('connection', (socket) => {
  connectionCount++;
  console.log(`New connection. Total connections: ${connectionCount}`);

  socket.on('close', () => {
    connectionCount--;
    console.log(`Connection closed. Total connections: ${connectionCount}`);
  });
});

console.log(`Current open connections: ${connectionCount}`);