What is Node Unblocker- Implementing Node Unblocker | XVOLA

Web proxies service allow you to keep your privacy protected and bypass various restrictions when browsing the internet in office or school. These proxies hide your information, such as your request origin and IP address. You can also use additional software to bypass restrictions like rate limitations.

Node unblocker can be used as a web proxy and includes a Node.js version. It can be used for web scraping, accessing geo-restricted information, and other functions. This article will show you how to use it.

What is node unblocker?

Web proxies that allows you to bypass internet censorship. It’s a Node. js-based library that has an Express compatible API. It makes it easy to set up your proxies quickly. It’s incredibly versatile because of its JS interface and can be used in many different ways.

Web scraping is one use case for a programmable proxy like node-unblocker. Web requests allow you to bypass geographical restrictions and hide IP. You can also use multiple proxies to avoid rate limiting. It dramatically reduces the chances of your bots being blocked.

Implementing Node Unblocker

You will need to have Node.js or npm installed to set up the node.unblocker. Follow the Node.js official guide or use a version control tool such as nvm.

Node Unblocker – Creating the script

Create a new folder, start an npm-project, and install the necessary dependencies.

mkdir proxy
cd proxy
npm init -y
npm install unblocker express


Express allows you to quickly create a web server, while Unblocker is an npm package name housing node-unblocker. Once you have all the required packages installed, you are ready to implement your proxy in a new file. Start with require()in your dependencies.

const express = require(“express”);
const Unblocker = require(“unblocker”);


Next, create an Express application and a new unblocker instance.

// …
const app = express();
const unblocker = new Unblocker({ prefix: “/proxy/” });


It supports a variety of options via its config object. The config object allows you to configure almost all aspects of the library. It includes request details and custom middleware. Because most of the proxy functionality is implemented using middleware, it’s possible to enable certain features selectively.

The “prefix” property in the above snippet is not set. This property will be used to indicate the path at which it can be accessed. In this situation/proxy/. The Express-compatible API makes connecting your proxy instance to the Express server easy by simply calling the use () Method.

// …


In the end, start your Express server by using the listen().

// …
app.listen(process.env.PORT || 8080).on(“upgrade”, unblocker.onUpgrade);
console.log(“Proxy is running on port:”, process.env.PORT || 8080)


The PORT environment variable will set the port for the server, with default settings of 8080. The upgrade handler (onUpgrade Method) has been added to the server. It tells the proxies when the protocol for the connection has been changed (or upgraded) from the HTTP to WebSocket. It allows proper handling of such connections.

This is how your script will look:

const express = require(“express”);
const Unblocker = require(“unblocker”);
const app = express();
const unblocker = new Unblocker({ prefix: “/proxy/” });app.use(unblocker);
app.listen(process.env.PORT || 8080).on(“upgrade”, unblocker.onUpgrade);
console.log(“Proxy is running on port:”, process.env.PORT || 8080);


Checking the proxies

You can test the proxies implementation using Node.js.

node index.js


If all goes well, you will see the console.log() message that should appear in your terminal. To verify the proxy is working, take a URL and prefix it with localhost:[PORT]/proxy/, for example, http://localhost:8080/proxy/https://www.xvola.com/. You will verify that all requests pass through the proxies in your DevTools. To see more information about each request, set the DEBUG environment variable in case of issues with the proxies.

DEBUG=unblocker:* node index.js


Deploying to Heroku

Once you have a working proxy, you can deploy it on a remote server such as Heroku.

Acceptable Use Policy

You should be familiar with the Acceptable Use Policy before deploying any proxy or web scraping application to remote servers. This type of application is not allowed by all providers. Many allow it under rigorous conditions.

Heroku’s policy prohibits hosting proxy servers for public use or web scraping. It also doesn’t respect robot exclusion standards like the robots.txt file and provides a unique user agent string. It is important to remember when working with Heroku.

Making Script

First, adjust your package.json file to deploy your app on Heroku.

“name”: “proxy”,
“version”: “1.0.0”,
“main”: “index.js”,
“private”: true,
“engines”: {
“node”: “16.x”
“dependencies”: {
“express”: “^4.17.1”,
“unblocker”: “^2.3.0”
“scripts”: {
“start”: “node index.js”


Add a start script to let Heroku know how your app is running. An engines section will tell Node.js which version to use. This example uses Node.js’ recent LTS version (v16) and nodeindex.js for the start command.

Deploying with Heroku CLI

The Heroku CLI makes it easy to deploy a Node.js application to Heroku. Make a Heroku account. Install the Heroku CLI. Use the login command to authenticate with Heroku using the CLI

heroku login


Create a new Heroku app.

heroku apps:create


You should see your app’s URL, ID, and Git URL in the terminal. To set the remote origin for the Git repo, use the ID.

git init
heroku git:remote -a [APP_ID]


Now all you have to do is commit your code to Heroku and then deploy it.

git add .
git commit -am “Initial commit”
git push heroku master


Now you should be able to access your proxy using your Heroku app URL. Please test it out as you did the localhost by going to the following or similar URL: HTTPS://[APP_ID].herokuapp. com/proxy/https://www.xvola.com/. Congratulations, your proxy is now up and running. It can be used as unique service or combined with a headless browser like Puppeteer to perform web scraping.

More about Node Unblocker

OAuth Issues

It is unlikely that the proxy will work with OAuth forms. It applies to any website that uses the postMessage() Method. This is a minor issue that you can solve in the future. However, it only applies to standard login forms and AJAX content at the moment.

Complex websites Problem

Many popular websites like Twitter, YouTube, and Discord won’t function correctly. It is possible for some content or parts not to appear or that a request fails. There is currently no time frame for resolving this.

Maintaining your property is a priority

As with any complex service, web scraping and proxy apps are difficult to manage and maintain. You must comply with cloud provider policies and manage proxy instances. These factors can lead to significant overhead, especially when running large proxy clusters.

Recommended Topic: Mobile Performance meter hack

The Bottom Line:

Although node-unblocker is easy to implement and deploy, some limitations to the proxy can be complex. A self-managed proxy can be challenging to manage due to the maintenance work required and other problems you may encounter.

These limitations are essential to know for comparison Now you should have a solid understanding of how to set up a proxy. Although it has many benefits, it also comes with some drawbacks.

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