Development Workflow

A modern development workflow for edge applications combines local development, testing, continuous integration, and automated deployment to deliver high-quality applications efficiently.

Local Development Environment

🔧 Clodo CLI

Command-line interface for project management, development server, and deployment

# Install CLI
npm install -g @clodo/cli

# Create new project
clodo create my-app

# Start development server
clodo dev

📝 Code Editor

VS Code with Clodo extensions for syntax highlighting, debugging, and IntelliSense

🧪 Testing Framework

Jest and Vitest for unit tests, integration tests, and end-to-end testing

🐳 Local Stack

Miniflare for local Cloudflare Workers simulation with KV, D1, and Durable Objects

Project Structure

my-clodo-app/
├── src/
│   ├── routes/
│   │   ├── api.ts
│   │   └── web.ts
│   ├── middleware/
│   │   ├── auth.ts
│   │   └── cors.ts
│   ├── models/
│   │   └── user.ts
│   └── index.ts
├── tests/
│   ├── unit/
│   ├── integration/
│   └── e2e/
├── migrations/
│   └── 001_initial.sql
├── clodo.config.ts
├── package.json
└── README.md

Testing Strategies

Unit Testing

Test individual functions and components in isolation

import { describe, it, expect } from 'vitest';
import { validateEmail } from '../src/utils/validation';

describe('Email Validation', () => {
  it('should validate correct email', () => {
    expect(validateEmail('user@example.com')).toBe(true);
  });

  it('should reject invalid email', () => {
    expect(validateEmail('invalid-email')).toBe(false);
  });
});

Integration Testing

Test how components work together, including database interactions

import { test, expect } from 'vitest';
import { Clodo } from '@clodo/framework';

test('user registration flow', async () => {
  const app = new Clodo();

  const response = await app.request('/api/register', {
    method: 'POST',
    body: JSON.stringify({
      email: 'test@example.com',
      password: 'password123'
    })
  });

  expect(response.status).toBe(201);
  const user = await response.json();
  expect(user.email).toBe('test@example.com');
});

E2E Testing

Test complete user journeys from frontend to backend

import { test, expect } from '@playwright/test';

test('complete user registration', async ({ page }) => {
  await page.goto('/register');

  await page.fill('[name="email"]', 'test@example.com');
  await page.fill('[name="password"]', 'password123');
  await page.click('[type="submit"]');

  await expect(page).toHaveURL('/dashboard');
  await expect(page.locator('.welcome-message')).toContainText('Welcome');
});

Continuous Integration & Deployment

1. Code Quality

Linting, type checking, and security scanning

2. Testing

Run unit, integration, and E2E test suites

3. Build

Optimize and bundle code for production

4. Deploy

Deploy to staging, run smoke tests, then production

5. Monitor

Monitor performance and error rates post-deployment

GitHub Actions Example

name: CI/CD Pipeline

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: '18'
      - run: npm ci
      - run: npm run lint
      - run: npm test
      - run: npm run build

  deploy-staging:
    needs: test
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: clodo deploy --env staging

  deploy-production:
    needs: deploy-staging
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: clodo deploy --env production

Performance Optimization

⚡ Response Time Optimization

  • Use streaming responses for large data
  • Implement caching strategies (CDN, KV, browser)
  • Optimize database queries and connections
  • Minimize external API calls

📦 Bundle Size Optimization

  • Tree shaking to remove unused code
  • Code splitting for better caching
  • Compress assets (gzip, brotli)
  • Lazy load non-critical resources

🔄 Runtime Optimization

  • Use efficient algorithms and data structures
  • Implement connection pooling
  • Cache expensive computations
  • Profile and optimize hot paths

🌐 Network Optimization

  • Minimize round trips with batching
  • Use HTTP/2 for multiplexing
  • Implement proper CORS headers
  • Optimize for edge network topology

Performance Monitoring

// Performance monitoring middleware
export async function performanceMiddleware(c, next) {
  const start = Date.now();

  const response = await next();

  const duration = Date.now() - start;

  // Log slow requests
  if (duration > 1000) {
    console.warn(`Slow request: ${c.req.method} ${c.req.url} took ${duration}ms`);
  }

  // Add performance headers
  response.headers.set('X-Response-Time', `${duration}ms`);
  response.headers.set('X-Edge-Location', c.req.cf?.colo || 'unknown');

  return response;
}

Security Best Practices

🔐 Authentication & Authorization

  • Use JWT with proper expiration
  • Implement role-based access control
  • Validate all user inputs
  • Use secure session management

🛡️ Input Validation & Sanitization

  • Validate and sanitize all inputs
  • Use parameterized queries
  • Implement rate limiting
  • Escape output to prevent XSS

🔒 Data Protection

  • Encrypt sensitive data at rest
  • Use HTTPS for all communications
  • Implement proper CORS policies
  • Regular security audits

🚨 Monitoring & Incident Response

  • Log security events
  • Implement intrusion detection
  • Have incident response plans
  • Regular security updates

Security Headers Middleware

export async function securityHeaders(c, next) {
  const response = await next();

  // Security headers
  response.headers.set('X-Frame-Options', 'DENY');
  response.headers.set('X-Content-Type-Options', 'nosniff');
  response.headers.set('Referrer-Policy', 'strict-origin-when-cross-origin');
  response.headers.set('Permissions-Policy', 'geolocation=(), microphone=()');

  // CSP header
  response.headers.set('Content-Security-Policy',
    "default-src 'self'; " +
    "script-src 'self' 'nonce-${c.req.nonce}'; " +
    "style-src 'self' https://fonts.googleapis.com; " +
    "font-src 'self' https://fonts.gstatic.com; " +
    "img-src 'self' data: https:; " +
    "connect-src 'self' https://api.example.com"
  );

  return response;
}

Scaling Strategies

Horizontal Scaling

Cloudflare automatically scales your application across 200+ edge locations based on traffic patterns.

Database Scaling

Use read replicas, connection pooling, and caching to handle increased database load.

Caching Strategies

Implement multi-layer caching: browser, CDN, edge, and database caching.

Load Balancing

Distribute traffic intelligently across regions and data centers.

Scaling Best Practices

  • Stateless Design: Design applications to be stateless for easy scaling
  • Auto-scaling: Let the platform handle scaling automatically
  • Monitoring: Monitor key metrics to identify scaling needs
  • Cost Optimization: Scale down during low-traffic periods
  • Global Distribution: Use edge locations to reduce latency worldwide
  • Failover: Implement automatic failover for high availability

Deployment Strategies

Blue-Green Deployment

Maintain two identical environments and switch traffic between them for zero-downtime deployments.

Canary Deployment

Gradually roll out new versions to a small percentage of users before full deployment.

Rolling Deployment

Update instances gradually while keeping the application available throughout the process.

Feature Flags

Deploy code with features disabled, then enable them gradually or for specific user groups.

Environment Configuration

// clodo.config.ts
export default {
  environments: {
    development: {
      database: 'dev-db',
      cache: 'dev-cache',
      debug: true
    },
    staging: {
      database: 'staging-db',
      cache: 'staging-cache',
      debug: false
    },
    production: {
      database: 'prod-db',
      cache: 'prod-cache',
      debug: false
    }
  },

  build: {
    minify: true,
    sourcemap: false,
    target: 'es2020'
  },

  deployment: {
    strategy: 'blue-green',
    healthCheck: '/api/health',
    rollback: {
      enabled: true,
      timeout: 300
    }
  }
};

Monitoring & Observability

📊 Cloudflare Analytics

Built-in analytics for requests, performance, and errors

🔍 Custom Logging

Structured logging with correlation IDs and context

📈 Performance Monitoring

Real-time performance metrics and alerting

🚨 Error Tracking

Comprehensive error tracking and reporting

Further Reading

Clodo Framework Guide

Learn about the framework that powers your development and deployment workflows.

Cloudflare Workers Guide

Understand the runtime environment and capabilities for your applications.

Edge Computing Guide

Master the edge computing paradigm that influences deployment strategies.

Documentation

Explore comprehensive documentation and guides for deploying at scale.

Ready to Deploy at Scale?

Master the development and deployment lifecycle with Clodo Framework's enterprise-grade tools and best practices.

Start Building