blocks|key|346517|text|http://nodejs.org/api/os.html#os_os_networkinterfaces|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|346518|var+os+=+require('os');

var+interfaces+=+os.networkInterfaces();
var+addresses+=+[];
for+(var+k+in+interfaces)+{
++++for+(var+k2+in+interfaces[k])+{
++++++++var+address+=+interfaces[k][k2];
++++++++if+(address.family+===+'IPv4'+&&+!address.internal)+{
++++++++++++addresses.push(address.address);
++++++++}
++++}
}

console.log(addresses);|code-block|syntax|javascript|346519|entityMap|0|LINK|mutability|MUTABLE|url^0|0|1H|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|4]]]]

<a href="http://nodejs.org/api/os.html#os_os_networkinterfaces">http://nodejs.org/api/os.html#os_os_networkinterfaces</a>

<pre><code>var os = require('os');

var interfaces = os.networkInterfaces();
var addresses = [];
for (var k in interfaces) {
 for (var k2 in interfaces[k]) {
 var address = interfaces[k][k2];
 if (address.family === 'IPv4' &amp;&amp; !address.internal) {
 addresses.push(address.address);
 }
 }
}

console.log(addresses);
</code></pre>

blocks|key|346535|text|https://github.com/indutny/node-ip|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|346536|var+ip+=+require("ip");
console.dir+(+ip.address()+);|code-block|syntax|javascript|346537|entityMap|0|LINK|mutability|MUTABLE|url^0|0|Y|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|4]]]]

<a href="https://github.com/indutny/node-ip">https://github.com/indutny/node-ip</a>

<pre><code>var ip = require("ip");
console.dir ( ip.address() );
</code></pre>

blocks|key|562637|text|我的版本需要一个紧凑的单文件脚本，希望对其他人有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|562638|var+ifs+=+require('os').networkInterfaces();
var+result+=+Object.keys(ifs)
++.map(x+=>+[x,+ifs[x].filter(x+=>+x.family+===+'IPv4')[0]])
++.filter(x+=>+x[1])
++.map(x+=>+x[1].address);|code-block|syntax|javascript|562639|或者回答最初的问题：|562640|var+ifs+=+require('os').networkInterfaces();
var+result+=+Object.keys(ifs)
++.map(x+=>+ifs[x].filter(x+=>+x.family+===+'IPv4'+&&+!x.internal)[0])
++.filter(x+=>+x)[0].address;|562641|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

My version which was needed for a compact and single file script, hope to be useful for others:

<pre><code>var ifs = require('os').networkInterfaces();
var result = Object.keys(ifs)
 .map(x =&gt; [x, ifs[x].filter(x =&gt; x.family === 'IPv4')[0]])
 .filter(x =&gt; x[1])
 .map(x =&gt; x[1].address);
</code></pre>

Or to answer the original question:

<pre><code>var ifs = require('os').networkInterfaces();
var result = Object.keys(ifs)
 .map(x =&gt; ifs[x].filter(x =&gt; x.family === 'IPv4' &amp;&amp; !x.internal)[0])
 .filter(x =&gt; x)[0].address;
</code></pre>

blocks|key|562580|text|$+npm+install+--save+quick-local-ip|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|562581|紧随其后|unstyled|562582|var+myip+=+require('quick-local-ip');

//getting+ip4+network+address+of+local+system
myip.getLocalIP4();

//getting+ip6+network+address+of+local+system
myip.getLocalIP6();|562583|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>$ npm install --save quick-local-ip
</code></pre>

follwed by

<pre><code>var myip = require('quick-local-ip');

//getting ip4 network address of local system
myip.getLocalIP4();

//getting ip6 network address of local system
myip.getLocalIP6();
</code></pre>

blocks|key|346575|text|https://github.com/dominictarr/my-local-ip|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|346576|$+npm+install+-g+my-local-ip
$+my-local-ip|code-block|syntax|javascript|346577|或|346578|$+npm+install+--save+my-local-ip
$+node
>+console.log(require('my-local-ip')())|346579|一个非常小的模块就可以做到这一点。|346580|entityMap|0|LINK|mutability|MUTABLE|url^0|0|16|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|10|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|11|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|12|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|4]]]]

<a href="https://github.com/dominictarr/my-local-ip" rel="noreferrer">https://github.com/dominictarr/my-local-ip</a>

<pre><code>$ npm install -g my-local-ip
$ my-local-ip
</code></pre>

or 

<pre><code>$ npm install --save my-local-ip
$ node
&gt; console.log(require('my-local-ip')())
</code></pre>

A very small module that does just this.

blocks|key|346762|text|savage单行传入|type|unstyled|depth|inlineStyleRanges|entityRanges|data|346763|根据已接受的答案，此函数将构建一个对象数组，其中包含取决于地址属性的条件条目|346764|[{name:+{interface+name},+ip:+{ip+address}},+...]|code-block|syntax|javascript|346765|const+ips+=+Object.entries(require("os").networkInterfaces()).reduce((acc,+iface)+=>+[...acc,+...(iface[1].reduce((acc,+address)+=>+acc+%7C%7C+(address.family+===+"IPv4"+&&+!address.internal),+false)+?+[{name:+iface[0],+ip:+iface[1].filter(address+=>+address.family+===+"IPv4"+&&+!address.internal).map(address+=>+address.address)[0]}]+:+[])],+[]);
console.log(ips);|346766|解释：|346767|const+ips+=+Object.entries(require("os").networkInterfaces())+//+fetch+network+interfaces
.reduce((acc,+iface)+=>+[+//+reduce+to+build+output+object
++++...acc,+//+accumulator
++++...(
++++++++iface[1].reduce((acc,+address)+=>+acc+%7C%7C+(address.family+===+"IPv4"+&&+!address.internal),+false)+?+//+conditional+entry
++++++++[+//+validate,+insert+it+in+output
++++++++++++{+//+create+{name,+ip}+object
++++++++++++++++name:+iface[0],+//+interface+name
++++++++++++++++ip:+iface[1]+//+interface+IP
++++++++++++++++.filter(address+=>+address.family+===+"IPv4"+&&+!address.internal)+//+check+is+IPv4+&&+not+internal
++++++++++++++++.map(address+=>+address.address)[0]+//+get+IP
++++++++++++}
++++++++]+
++++++++:+
++++++++[]+//+ignore+interface+&&+ip
++++)
],+[]);|346768|输出示例：|346769|Array(4)+[Object,+Object,+Object,+Object]
length:4
__proto__:Array(0)+[,+…]
0:Object+{name:+"vEthernet+(WSL)",+ip:+"172.31.xxx.x"}
1:Object+{name:+"Ethernet",+ip:+"10.0.x.xx"}
2:Object+{name:+"VMware+Network+Adapter+VMnet1",+ip:+"192.168.xxx.x"}
3:Object+{name:+"VMware+Network+Adapter+VMnet8",+ip:+"192.168.xx.x"}|346770|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|X|8|@]|9|@]|A|$G|H]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|F|7|Z|8|@]|9|@]|A|$G|H]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|11|8|@]|9|@]|A|$G|H]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

savage one-liner incoming

based on accepted answer, this one will build an array of objects with conditional entries depending on address properties

<pre><code>[{name: {interface name}, ip: {ip address}}, ...]
</code></pre>

<pre><code>const ips = Object.entries(require("os").networkInterfaces()).reduce((acc, iface) =&gt; [...acc, ...(iface[1].reduce((acc, address) =&gt; acc || (address.family === "IPv4" &amp;&amp; !address.internal), false) ? [{name: iface[0], ip: iface[1].filter(address =&gt; address.family === "IPv4" &amp;&amp; !address.internal).map(address =&gt; address.address)[0]}] : [])], []);
console.log(ips);
</code></pre>

Explained : 

<pre><code>const ips = Object.entries(require("os").networkInterfaces()) // fetch network interfaces
.reduce((acc, iface) =&gt; [ // reduce to build output object
 ...acc, // accumulator
 ...(
 iface[1].reduce((acc, address) =&gt; acc || (address.family === "IPv4" &amp;&amp; !address.internal), false) ? // conditional entry
 [ // validate, insert it in output
 { // create {name, ip} object
 name: iface[0], // interface name
 ip: iface[1] // interface IP
 .filter(address =&gt; address.family === "IPv4" &amp;&amp; !address.internal) // check is IPv4 &amp;&amp; not internal
 .map(address =&gt; address.address)[0] // get IP
 }
 ] 
 : 
 [] // ignore interface &amp;&amp; ip
 )
], []);
</code></pre>

Output example :

<pre><code>Array(4) [Object, Object, Object, Object]
length:4
__proto__:Array(0) [, …]
0:Object {name: "vEthernet (WSL)", ip: "172.31.xxx.x"}
1:Object {name: "Ethernet", ip: "10.0.x.xx"}
2:Object {name: "VMware Network Adapter VMnet1", ip: "192.168.xxx.x"}
3:Object {name: "VMware Network Adapter VMnet8", ip: "192.168.xx.x"}
</code></pre>

blocks|key|562728|text|从Node版本0.9.6开始，就有了一种简单的方法来根据每个请求获取服务器的IP地址。如果您的机器有多个IP地址，或者即使您在本地主机上执行某些操作，这一点也可能很重要。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|562729|req.socket.localAddress将根据当前连接返回正在运行的机器节点的地址。|offset|length|style|CODE|562730|如果您的公共IP地址为1.2.3.4，并且有人从外部访问您的节点服务器，则req.socket.localAddress的值将为"1.2.3.4"。|562731|如果您从本地主机访问同一服务器，则地址将为"127.0.0.1"|562732|如果您的服务器有多个公共地址，那么req.socket.localAddress的值将是套接字连接的正确地址。|562733|entityMap^0|0|0|N|0|B|7|11|N|1S|9|0|L|B|0|H|N|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@$D|U|E|V|F|G]|$D|W|E|X|F|G]|$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|13|8|@$D|14|E|15|F|G]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|O|$]]

Ever since Node version 0.9.6 there is a simple way to get the server's IP address based on each request. This could be important if your machine has multiple IP addresses or even if you are doing something on localhost.

<code>req.socket.localAddress</code> will return the address of the machine node is running on based on the current connection.

If you have a public IP address of <code>1.2.3.4</code> and someone hits your node server from the outside then the value for <code>req.socket.localAddress</code> will be <code>"1.2.3.4"</code>.

If you hit the same server from localhost then the address will be <code>"127.0.0.1"</code>

If your server has multiple public addresses then the value of <code>req.socket.localAddress</code> will be the correct address of the socket connection.

blocks|key|346836|text|使用一些es6和模块语法修改了一些Ebrahim's+answer，以便更精简的代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|346837|import+{+networkInterfaces+}+from+"os";
const+netInterfaces+=+networkInterfaces();
const+[{+address+}]+=+Object.values(netInterfaces).flatMap((netInterface)+=>
++netInterface.filter((prop)+=>+prop.family+===+"IPv4"+&&+!prop.internal)
);
console.log(address)+//+->+'192.168...'|code-block|syntax|javascript|346838|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/38929214/5762431^0|H|G|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Modified a bit <a href="https://stackoverflow.com/a/38929214/5762431">Ebrahim's answer</a> with some es6 and module syntax, for leaner code:
<pre class="lang-js prettyprint-override"><code>import { networkInterfaces } from &quot;os&quot;;
const netInterfaces = networkInterfaces();
const [{ address }] = Object.values(netInterfaces).flatMap((netInterface) =&gt;
 netInterface.filter((prop) =&gt; prop.family === &quot;IPv4&quot; &amp;&amp; !prop.internal)
);
console.log(address) // -&gt; '192.168...'
</code></pre>

I'm not referring to

127.0.0.1

But rather the one that other computers would use to access the machine e.g.

192.168.1.6

How can I get the local IP address in Node.js?

我不是指127.0.0.1而是其他计算机用来访问机器的文件，例如192.168.1.6

问如何在Node.js中获取本地IP地址？
EN

回答 8

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问如何在Node.js中获取本地IP地址？EN

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问如何在Node.js中获取本地IP地址？
EN