Express.js – req.ips Property

The req.ips property contains an array of all the IP addresses in the X-Forwarded-For request header value. This property is only populated when the trust proxy setting does not evaluate to False. This header values or IP's can be set either by the proxy or the client.

Syntax

req.ips

Example 1

Create a file with the name "reqIps.js" and copy the following code snippet. After creating the file, use the command "node reqIps.js" to run this code as shown in the example below −

// req.ips Property Demo Example
// Importing the express & cookieParser module
var cookieParser = require('cookie-parser');
var express = require('express');

// Initializing the express and port number
var app = express();

// Initializing the router from express
var router = express.Router();
var PORT = 3000;

// Defining multiple Endpoint
app.get('/api', function (req, res) {
   console.log("IP's : ", req.ips);
   res.send(req.ips);
});
app.listen(PORT, function(err){
   if (err) console.log(err);
   console.log("Server listening on PORT", PORT);
});

Hit the following Endpoint with a GET request: localhost:3000/api

Output

C:\home
ode>> node reqIps.js
Server listening on PORT 3000
IP's : []

Example 2

Let's take a look at one more example.

// req.ips Property Demo Example
// Importing the express & cookieParser module
var cookieParser = require('cookie-parser');
var express = require('express');

// Initializing the express and port number
var app = express();

// Initializing the router from express
var router = express.Router();
var PORT = 3000;

// Defining multiple Endpoint
app.get('/api', function (req, res) {
   console.log("IP's : ", req.ips);
   res.send(req.ips);
});
app.listen(PORT, function(err){
   if (err) console.log(err);
   console.log("Server listening on PORT", PORT);
});

Output

Hit the following Endpoint one by one −

• GET Request – localhost:3000/api

and set the header as −

• x-forwarded-for: 105.0.114.165, 61.91.3.17, 120.192.192.255

C:\home
ode>> node reqIps.js
Server listening on PORT 3000
Server listening on PORT 3000
IP's : [105.0.114.165, 61.91.3.17, 120.192.192.255]

Mayank Agarwal

e

Updated on: 06-Apr-2022

221 Views

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