因为傻逼老板的垃圾需求，不得不成长

示例代码：
获取本地局域网  ip  地址：

需要注意的是：如果存在虚拟机网络，则返回的是虚拟机网络的  ipv4  地址

import os from 'os';
export const getLocalIp = () => {const interfaces = os.networkInterfaces();for (const name of Object.keys(interfaces)) {for (const net of interfaces[name]) {if (net.family === 'IPv4' && !net.internal) {return net.address;}}}return 'Can not get local IP';
};

扫描本地端口：

因为我需要查找本地几个  ip  的  3000  端口是否开放   可根据实际需求自行修改部分代码：

import os from 'os';
import net from "net";
const { Socket } = net;const timeout = 100;
export const getLocalIp = () => {const interfaces = os.networkInterfaces();for (const name of Object.keys(interfaces)) {for (const net of interfaces[name]) {if (net.family === 'IPv4' && !net.internal) {return net.address;}}}return 'Can not get local IP';
};const scanHostPort = (host, port, cb) => {return new Promise((resolve, reject) => {const socket = new Socket();socket.setTimeout(timeout);socket.on("connect", function () {console.debug(`链接成功：${host}`);socket.end();cb && cb(null, host);resolve(host);});socket.on("timeout", function () {// console.error(`链接超时：${host}`);socket.destroy();cb && cb(new Error("timeout"), host);resolve(false);});socket.on("error", function (err) {// console.warn(`链接失败：${host}`);cb && cb(err, host);resolve(false);});socket.on("close", function (err) {});socket.connect(port, host);});
}export const scanIPs = async () => {const current_ip = getLocalIp();let current_ip_parts = current_ip.split('.');current_ip_parts.pop();current_ip_parts = current_ip_parts.join('.');const deferCache = [];for (let index = 0; index <= 255; index++) {deferCache.push(scanHostPort(`${current_ip_parts}.${index}`,3000));}const result = (await Promise.all(deferCache)).filter((it) => it);return result;
}