如何在Node.js中获取本机IP地址

gistfile1.js

//获取本地IP地址
var os = require('os');  
var IPv4,hostName;  
hostName=os.hostname();  
for(var i=0;i<os.networkInterfaces().eth0.length;i++){  
    if(os.networkInterfaces().eth0[i].family=='IPv4'){  
        IPv4=os.networkInterfaces().eth0[i].address;  
    }  
}  
console.log('----------local IP: '+IPv4);  
console.log('----------local host: '+hostName);



//获取外网IP地址
//需要添加库：npm install jquery   
//          npm install iconv-lite  
var $ = require('jquery'),  
    iconv = require('iconv-lite'),  
    http = require('http');  
  
  
var options = {  
    host:'ip.qq.com',  
    port:80,  
    path:'/'  
};  
  
var html = "";//http获取html字符串  
http.get(options, function (res) {  
    res.setEncoding('binary');//or hex  
    res.on('data',function (data) {//加载数据,一般会执行多次  
        html += data;  
    }).on('end', function () {  
            html=iconv.decode(new Buffer(html,'binary'), 'GBK');//把gbk编码转换成  
            var dom = $(html);  
            var ip=dom.find("#login_show .red").text();  
            if(ip.split('.').length==4){  
                console.log('server ip: '+ip);  
            }  
        })  
});  

获取本地ip会报错。networkInterfaces()是对象不是数组。修改代码如下:

_.getIp = function(){
    var os = require('os');
    var interfaces = os.networkInterfaces();
    var IPv4 = '127.0.0.1';
    for (var key in interfaces) {
      var alias = 0;
      interfaces[key].forEach(function(details){
        if (details.family == 'IPv4' && key == 'en0'  ) {
            IPv4 = details.address;
        }
      });
    }
    return IPv4;
}

windows 下情况也不一样。得依据系统区分来写

Windows 10 下是 key === '以太网'