如果你不想安装依赖，并且正在运行*nix系统，你可以这样做:

hostname -I

你会得到主机的所有地址，你可以在node中使用这个字符串:

const exec = require('child_process').exec;
let cmd = "hostname -I";
exec(cmd, function(error, stdout, stderr)
{
  console.log(stdout + error + stderr);
});

是一行代码，你不需要像'os'或'node-ip'这样可能会意外增加代码复杂性的其他库。

hostname -h

也是你的朋友;-)

希望能有所帮助!

您的本地IP地址总是127.0.0.1。

然后是网络IP地址，可以从ifconfig (*nix)或ipconfig (win)中获取。这只在本地网络中有用。

然后是你的外部/公共IP地址，你只能通过某种方式向路由器请求它，或者你可以设置一个外部服务，在收到请求时返回客户端IP地址。还有其他类似的服务，比如whatismyip.com。

在某些情况下(例如，如果您有一个广域网连接)，网络IP地址和公共IP地址是相同的，并且都可以用于外部访问您的计算机。

如果您的网络和公共IP地址不同，您可能需要让网络路由器将所有传入连接转发到您的网络IP地址。

2013年更新:

现在有了一种新的方法。你可以检查连接的套接字对象的localAddress属性，例如net.socket.localAddress。它返回套接字一端的地址。

最简单的方法是打开一个随机端口并监听它，然后获取您的地址并关闭套接字。

2015年更新:

前面的已经不管用了。

https://github.com/indutny/node-ip

var ip = require("ip");
console.dir ( ip.address() );

Use:

var os = require('os');
var networkInterfaces = os.networkInterfaces();
var arr = networkInterfaces['Local Area Connection 3']
var ip = arr[1].address;

这是我的变体，允许以可移植的方式获得IPv4和IPv6地址:

/**
 * Collects information about the local IPv4/IPv6 addresses of
 * every network interface on the local computer.
 * Returns an object with the network interface name as the first-level key and
 * "IPv4" or "IPv6" as the second-level key.
 * For example you can use getLocalIPs().eth0.IPv6 to get the IPv6 address
 * (as string) of eth0
 */
getLocalIPs = function () {
    var addrInfo, ifaceDetails, _len;
    var localIPInfo = {};
    //Get the network interfaces
    var networkInterfaces = require('os').networkInterfaces();
    //Iterate over the network interfaces
    for (var ifaceName in networkInterfaces) {
        ifaceDetails = networkInterfaces[ifaceName];
        //Iterate over all interface details
        for (var _i = 0, _len = ifaceDetails.length; _i < _len; _i++) {
            addrInfo = ifaceDetails[_i];
            if (addrInfo.family === 'IPv4') {
                //Extract the IPv4 address
                if (!localIPInfo[ifaceName]) {
                    localIPInfo[ifaceName] = {};
                }
                localIPInfo[ifaceName].IPv4 = addrInfo.address;
            } else if (addrInfo.family === 'IPv6') {
                //Extract the IPv6 address
                if (!localIPInfo[ifaceName]) {
                    localIPInfo[ifaceName] = {};
                }
                localIPInfo[ifaceName].IPv6 = addrInfo.address;
            }
        }
    }
    return localIPInfo;
};

下面是同一个函数的CoffeeScript版本:

getLocalIPs = () =>
    ###
    Collects information about the local IPv4/IPv6 addresses of
      every network interface on the local computer.
    Returns an object with the network interface name as the first-level key and
      "IPv4" or "IPv6" as the second-level key.
    For example you can use getLocalIPs().eth0.IPv6 to get the IPv6 address
      (as string) of eth0
    ###
    networkInterfaces = require('os').networkInterfaces();
    localIPInfo = {}
    for ifaceName, ifaceDetails of networkInterfaces
        for addrInfo in ifaceDetails
            if addrInfo.family=='IPv4'
                if !localIPInfo[ifaceName]
                    localIPInfo[ifaceName] = {}
                localIPInfo[ifaceName].IPv4 = addrInfo.address
            else if addrInfo.family=='IPv6'
                if !localIPInfo[ifaceName]
                    localIPInfo[ifaceName] = {}
                localIPInfo[ifaceName].IPv6 = addrInfo.address
    return localIPInfo

console.log(getLocalIPs())的示例输出

{ lo: { IPv4: '127.0.0.1', IPv6: '::1' },
  wlan0: { IPv4: '192.168.178.21', IPv6: 'fe80::aa1a:2eee:feba:1c39' },
  tap0: { IPv4: '10.1.1.7', IPv6: 'fe80::ddf1:a9a1:1242:bc9b' } }

我只用Node.js就能做到这一点。

node . js:

var os = require( 'os' );
var networkInterfaces = Object.values(os.networkInterfaces())
    .reduce((r,a) => {
        r = r.concat(a)
        return r;
    }, [])
    .filter(({family, address}) => {
        return family.toLowerCase().indexOf('v4') >= 0 &&
            address !== '127.0.0.1'
    })
    .map(({address}) => address);
var ipAddresses = networkInterfaces.join(', ')
console.log(ipAddresses);

作为Bash脚本(需要安装Node.js)

function ifconfig2 ()
{
    node -e """
        var os = require( 'os' );
        var networkInterfaces = Object.values(os.networkInterfaces())
            .reduce((r,a)=>{
                r = r.concat(a)
                return r;
            }, [])
            .filter(({family, address}) => {
                return family.toLowerCase().indexOf('v4') >= 0 &&
                    address !== '127.0.0.1'
            })
            .map(({address}) => address);
        var ipAddresses = networkInterfaces.join(', ')
        console.log(ipAddresses);
    """
}