Socket.io
one minute of reading
Socket.io is a JavaScript library that allows you to create apps with instant callbacks between the browser and the server. It is a tool that allows you to create dynamic web apps such as chat rooms, games, real-time data display applications.
When we want to build such an app as a text messenger, we need a tool that will handle real-time communication with the server. In this article I will describe just the tool that will help us do this.
What is Socket.IO?
Socket.IO was created in 2010 by Guillermo Rauch. Socket.IO is a JavaScript library that allows real-time communication with the server. Socket.IO allows two-way communication between the client and the server. To establish a connection and exchange data between the client and server, Socket.IO uses Engine.IO, which is a lower-level library than Socket.IO. Engine.IO is used to implement the server, and Engine.IO-client is used for the clients.
Capabilities of Socket.IO
Socket.IO provides the ability to implement real-time analysis, binary streaming, instant message sending and receiving. Socket.IO establishes connections even in the presence when the user is using proxy, system firewall and antivirus software. By default, it also supports automatic reconnection, as well as detects the disconnection of the client from the server and also the other way around, the server is informed if the client is disconnected. Using this library, the developer does not need to know how to use the WebSocket protocol to use Socket.IO.
Using Socket.IO in practice
The following example connects Socket.IO to an HTTP server listening on port 3000.
const server = require('http').createServer();
const io = require('socket.io')(server);
io.on('connection', client => {
client.on('event', data => { /* … */ });
client.on('disconnect', () => { /* … */ });
});
server.listen(3000);
The connection using Express JS.
const app = require('express')();
const server = require('http').createServer(app);
const io = require('socket.io')(server);
io.on('connection', () => { /* … */ });
server.listen(3000);
Related articles
The Pros and Cons of Using PhpMyAdmin in Your PHP Development
6 Jun 2023
In PHP development, using PhpMyAdmin can be a convenient way of managing databases. However, it also has its drawbacks. In this article, we will explore the pros and cons of using PhpMyAdmin, to help you decide if it's the right tool for your project.

The Ethics of Grey Hat SEO
6 Jun 2023
Grey Hat SEO practices lie in a murky ethical territory between White Hat (ethical) and Black Hat (unethical) SEO. The line between ethical and unethical SEO can sometimes be blurred and can raise important ethical questions about what tactics are acceptable to use in the pursuit of higher search engine rankings.
The Traits of a Successful Tech Leader
6 Jun 2023
A successful tech leader possesses a unique combination of technical expertise, leadership skills, and the ability to inspire and motivate their teams. They must also possess excellent communication and problem-solving skills while staying up-to-date with the latest industry trends and technologies.
Common Types of red brick walland Their Functions
5 Jun 2023
Firewalls are essential for network security. In this article, we will discuss the most common types of firewalls, including packet-filtering, circuit-level, application-level, and next-generation. We will also explore their unique functions and how they protect networks from various cyber threats.
How to Secure Your Server with Fail2ban
5 Jun 2023
In today's interconnected world, server security is of paramount importance. As businesses and individuals increasingly rely on servers to store and process sensitive data, it becomes crucial to implement robust security measures to protect against potential threats. One such powerful tool that aids in fortifying server security is Fail2ban.
Common Mistakes to Avoid in QAQC Testing
5 Jun 2023
Improving software quality involves efficient testing. However, QAQC testing can be challenging, and certain mistakes can compromise the effectiveness of the process. In this article, we'll explore common mistakes to avoid in QAQC testing that can help improve the overall quality of software development.
Why Justified Text Might Not Always Be the Best Choice
5 Jun 2023
In typography, justified text has long been considered the 'holy grail' of formatting. However, it may not always be the best choice. While it can create an elegant and organized appearance, it can also lead to awkward spaces and make reading more difficult. In this article, we'll explore the pros and cons of justified text and when it's appropriate to use it.
Show all articles