WebSocket

WebSocket Server is a technology that enables real-time communication between a web application and a server. It provides a bidirectional data transmission mechanism that allows both the client and the server to send messages to each other simultaneously. Unlike traditional HTTP communication, WebSockets enable full-duplex communication between the client and server, making it ideal for real-time applications.

A WebSocket Server works by establishing a persistent connection between the client and the server using the WebSocket Protocol. This connection remains open, allowing for two-way communication, unlike traditional HTTP communication, which is based on request-response interactions. The WebSocket Protocol allows for low latency and high-frequency data transfer, making it suitable for real-time applications.

Enable WebSocket in Cpanel Server with Nginx

To test a WebSocket server, use

https://ws-playground.netlify.app

On Nginx Proxy connection, to allow websocket, add

proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";

example

location / {
    proxy_set_header X-Real-IP  $remote_addr;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_pass http://127.0.0.1:3000;
}