Real-Time Chat App

A simple WebSocket-based chat application.

Features

• Real-time messaging
• Online users tracking
• Message history (last 20 messages)
• Join/leave notifications

Tech Stack

Backend: Go, Gorilla WebSocket
Frontend: Vanilla JavaScript, Tailwind CSS

Run Locally

go run cmd/server/main.go

Open http://localhost:8080

Project Structure

├── cmd/server/          # Entry point
├── internal/
│   ├── app/            # Application setup
│   ├── handler/        # HTTP & WebSocket handlers
│   ├── logger/         # Logging utility
│   └── ws/             # WebSocket logic (Hub, Client)
└── chat-frontend/       # SPA frontend

How It Works

• Hub pattern manages all client connections
• Go channels handle concurrency safely
• Single-page application with custom router
• WebSocket for real-time bidirectional communication