本文介绍在Electron应用中通过Node.js内置os模块的networkInterfaces方法获取设备Mac地址的实现方案。代码遍历网络接口，过滤虚拟接口及全零地址，提取真实物理网卡地址，适用于基于设备标识的单点登录场景。
引言
为了实现单点登录功能，通常需要使用唯一的设备标识来区分客户端。Mac地址作为一种硬件标识符，是一个较为理想的选择。
实现思路
可以利用Node.js内置的os模块，调用其提供的networkInterfaces方法。该方法返回包含网络接口信息的对象数组。通过遍历该结构，即可提取出Mac地址。首先查看该方法返回的数据格式。
import { networkInterfaces } from "os";
console.log(JSON.stringify(networkInterfaces()));
{
"Ethernet0": [{
"address": "fe80::803c:6a7b:14b0:f652",
"netmask": "ffff:ffff:ffff:ffff::",
"family": "IPv6",
"mac": "00:0c:29:ea:41:55",
"internal": false,
"cidr": "fe80::803c:6a7b:14b0:f652/64",
"scopeid": 7
}, {
"address": "192.168.213.154",
"netmask": "255.255.255.0",
"family": "IPv4",
"mac": "00:0c:29:ea:41:55",
"internal": false,
"cidr": "192.168.213.154/24"
}],
"Loopback Pseudo-Interface 1": [{
"address": "::1",
"netmask": "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
"family": "IPv6",
"mac": "00:00:00:00:00:00",
"internal": true,
"cidr": "::1/128",
"scopeid": 0
}, {
"address": "127.0.0.1",
"netmask": "255.0.0.0",
"family": "IPv4",
"mac": "00:00:00:00:00:00",
"internal": true,
"cidr": "127.0.0.1/8"
}]
}代码封装
返回的数据结构为键值对形式。因此，可以直接获取键名进行遍历，从对应的对象中提取Mac地址字段。具体实现如下：
/**获取mac地址信息 */
export const getMacAddress = function (): string {
const interfaces = networkInterfaces();
let macAddress = "";
for (const interfaceName of Object.keys(interfaces)) {
const interfaceInfos = interfaces[interfaceName];
if (interfaceInfos) {
for (const interfaceInfo of interfaceInfos) {
if (interfaceInfo.mac && interfaceInfo.mac !== "00:00:00:00:00:00") {
macAddress = interfaceInfo.mac;
break;
}
}
}
if (macAddress.length > 0) break;
}
return macAddress;
};
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