Web applications and the chat gateway
Adding real-time features to web applications has become a common requirement.
In this post, I look at the chat gateway we built with NestJS, how it uses WebSocket communication, and how users join the real-time messaging system.
The communication flow:
Client
↕ WebSocket / Socket.io
NestJS Chat Gateway
↕
Chat roomWhat the project does
The code shows how to create a WebSocket gateway that lets users exchange messages in real time.
Challenges in real-time communication
Real-time interactions can become difficult to manage, especially when many users are connected at once. WebSocket communication and tools such as NestJS help with that work.
How does this chat gateway handle messaging?
Using it
If you have a web application and want users to communicate in real time, this gateway provides a WebSocket communication channel to build on.
Connections and messages
Connected users can exchange messages within a room. The gateway manages rooms and users entering or leaving them.
It also lets users sign in and stores their session information, so that information is available when they reconnect.
Features
- Real-time messaging
- Room-based communication
- Session management
- A live count of connected users
- Message history
Final thoughts
NestJS and WebSocket communication provide the basis for the real-time features in this project. The gateway is a starting point for building a chat application and adding more features around its communication and session handling.