Go Cloud Functions on EdgeOne Pages - Chi Framework

A full-stack demo application built with Next.js + Tailwind CSS frontend and Go Chi backend, showcasing how to deploy Go Cloud Functions using the Chi router on EdgeOne Pages with RESTful API routing.

🚀 Features

• Chi Router Integration: Lightweight, composable Go HTTP router with middleware stack and route groups
• Modern UI Design: Dark theme with #1c66e5 accent color, responsive layout with interactive elements
• Interactive API Testing: Built-in API endpoint panel — click "Call" to test each REST endpoint in real-time
• RESTful API Design: Complete Todo CRUD operations with structured route groups (/api/todos)
• TypeScript Support: Complete type definitions and type safety on the frontend

🛠️ Tech Stack

Frontend

• Next.js 15 - React full-stack framework (with Turbopack)
• React 19 - User interface library
• TypeScript - Type-safe JavaScript
• Tailwind CSS 4 - Utility-first CSS framework

UI Components

• shadcn/ui - High-quality React components
• Lucide React - Beautiful icon library
• class-variance-authority - Component style variant management
• clsx & tailwind-merge - CSS class name merging utilities

Backend

• Go 1.21 - Cloud Functions runtime
• Chi v5 - Lightweight, composable Go HTTP router

📁 Project Structure

go-chi/
├── cloud-functions/                # Go Cloud Functions source
│   ├── api.go                     # Chi app with all REST API routes
│   ├── go.mod                     # Go module definition
│   └── go.sum                     # Go dependency checksums
├── src/
│   ├── app/                       # Next.js App Router
│   │   ├── globals.css           # Global styles (dark theme)
│   │   ├── layout.tsx            # Root layout
│   │   └── page.tsx              # Main page (API testing UI)
│   ├── components/               # React components
│   │   └── ui/                   # UI base components
│   │       ├── button.tsx        # Button component
│   │       └── card.tsx          # Card component
│   └── lib/                      # Utility functions
│       └── utils.ts              # Common utilities (cn helper)
├── public/                        # Static assets
│   ├── eo-logo-blue.svg          # EdgeOne logo (blue)
│   └── eo-logo-white.svg         # EdgeOne logo (white)
├── package.json                   # Project configuration
└── README.md                     # Project documentation

🚀 Quick Start

Requirements

• Node.js 18+
• pnpm (recommended) or npm
• Go 1.21+ (for local development)

Install Dependencies

pnpm install
# or
npm install

Development Mode

edgeone pages dev

Visit http://localhost:8088 to view the application.

Build Production Version

edgeone pages build

🎯 Core Features

1. Chi REST API Routes

All API endpoints are defined in a single cloud-functions/api.go file using Chi's route groups:

Method	Route	Description
GET	/	Welcome message with route list
GET	/health	Health check
GET	/api/todos	List all todos
POST	/api/todos	Create a new todo
GET	/api/todos/{id}	Get todo by ID
PATCH	/api/todos/{id}/toggle	Toggle todo completion
DELETE	/api/todos/{id}	Delete a todo

2. Interactive API Testing Panel

• 7 pre-configured API endpoint cards with "Call" buttons
• Real-time JSON response display with syntax highlighting
• POST request support with pre-filled JSON body
• Loading states and error handling

3. Chi Framework Convention

The Go backend uses Chi's standard patterns — composable routing, middleware, and subrouters:

package main

import (
    "github.com/go-chi/chi/v5"
    "github.com/go-chi/chi/v5/middleware"
    "net/http"
)

func main() {
    r := chi.NewRouter()

    r.Use(middleware.Recoverer)
    r.Use(middleware.Logger)

    r.Route("/api/todos", func(r chi.Router) {
        r.Get("/", listTodos)
        r.Post("/", createTodo)
        r.Get("/{id}", getTodo)
        r.Patch("/{id}/toggle", toggleTodo)
        r.Delete("/{id}", deleteTodo)
    })

    http.ListenAndServe(":9000", r)
}

4. Data Model

type Todo struct {
    ID        int       `json:"id"`
    Title     string    `json:"title"`
    Completed bool      `json:"completed"`
    CreatedAt time.Time `json:"createdAt"`
}

🔧 Configuration

Tailwind CSS Configuration

The project uses Tailwind CSS 4 with custom color variables:

:root {
  --primary: #1c66e5;        /* Primary color */
  --background: #000000;     /* Background color */
  --foreground: #ffffff;     /* Foreground color */
}

Component Styling

Uses class-variance-authority to manage component style variants with multiple preset styles.

📚 Documentation

• EdgeOne Pages Official Docs: https://pages.edgeone.ai/document/go
• Chi Router: https://go-chi.io/#/README
• Next.js Documentation: https://nextjs.org/docs
• Tailwind CSS Documentation: https://tailwindcss.com/docs

🚀 Deployment Guide

EdgeOne Pages Deployment

1. Push code to GitHub repository
2. Create new project in EdgeOne Pages console
3. Select GitHub repository as source
4. Configure build command: edgeone pages build
5. Deploy project

Go Chi Cloud Function

Create cloud-functions/api.go in project root with your Chi application:

package main

import (
    "github.com/go-chi/chi/v5"
    "net/http"
    "encoding/json"
)

func main() {
    r := chi.NewRouter()

    r.Get("/hello", func(w http.ResponseWriter, r *http.Request) {
        w.Header().Set("Content-Type", "application/json")
        json.NewEncoder(w).Encode(map[string]string{
            "message": "Hello from Go Chi on EdgeOne Pages!",
        })
    })

    http.ListenAndServe(":9000", r)
}

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.