Getting the client IP address in a Node.js Express application is a common task. Here is a simple tutorial on how to do it.
1. Install the ip-address npm package
The first step is to install the ip-address npm package. This package provides a simple way to get the client IP address from a Node.js Express application.
To install the package, open a terminal window and run the following command:
npm install ip-address
2. Require the ip-address package
Once the package is installed, you can require it in your Node.js Express application.
To do this, add the following line of code to the top of your application:
const ip = require(‘ip-address’);
3. Get the client IP address
Now that the package is installed and required, you can get the client IP address.
To do this, add the following line of code to your application:
const clientIp = ip.address();
This will return the client IP address as a string.
4. Use the client IP address
Now that you have the client IP address, you can use it in your application.
For example, you could use it to log the IP address of each user that visits your application.
Conclusion
In this tutorial, we have shown you how to get the client IP address in a Node.js Express application. We have also shown you how to use the client IP address in your application.
Node js express get client ip address example. In this tutorial, you will learn how to get client ip address in node js and express js using request ip.
An IP address, or Internet Protocol address, is a series of numbers that identifies any device on a network. Computers use IP addresses to communicate with each other both over the internet as well as on other networks.
A small node.js module to retrieve the request’s IP address. It looks for specific headers in the request and falls back to some defaults if they do not exist.
The user IP is determined by the following order:
X-Client-IPX-Forwarded-For(Header may return multiple IP addresses in the format: “client IP, proxy 1 IP, proxy 2 IP”, so we take the the first one.)CF-Connecting-IP(Cloudflare)Fastly-Client-Ip(Fastly CDN and Firebase hosting header when forwared to a cloud function)True-Client-Ip(Akamai and Cloudflare)X-Real-IP(Nginx proxy/FastCGI)X-Cluster-Client-IP(Rackspace LB, Riverbed Stingray)X-Forwarded,Forwarded-ForandForwarded(Variations of #2)req.connection.remoteAddressreq.socket.remoteAddressreq.connection.socket.remoteAddressreq.info.remoteAddress
If an IP address cannot be found, it will return null.
How to Get Client IP Address in Node JS
- Step 1 – Create Node JS App
- Step 2 – Install Express and request-ip Library
- Step 3 – Create Server.js File
- Step 4 – Import Request Ip Dependencies in Server.js File
- Step 5 – Start Development Server
Step 1 – Create Node JS App
Execute the following command on terminal to install node js app:
mkdir my-app cd my-app npm init -y
Step 2 – Install Express and request-ip Library
In this step, open again your terminal and execute the following command to install express and multer dependencies in your node js app:
npm install express npm install request-ip --save
Step 3 – Create Server.js File
In this step, you need to create server.js file and add the following code into it:
var express = require('express');
var app = express();
app.get('/',function(request, response) {
var clientIp = requestIp.getClientIp(request);
console.log(clientIp);
});
app.listen(3000, () => console.log(`App listening on port 3000`))
Step 4 – Import Request Ip Dependencies in Server.js File
In this step, you need to import request ip dependencies in server.js file:
var requestIp = require('request-ip');
Click to know more about the express.
Step 5 – Start Development Server
You can use the following command to run development server:
//run the below command npm start after run this command open your browser and hit http://127.0.0.1:3000/
Conclusion
Node js express get client ip address example. In this tutorial, you have learned how to get client ip address in node js and express js using request ip.
