Serverless Edge

AWS Lambda@Edge

CloudFront Function

export async function handler(event: AWSCloudFrontEvent) {
  const request = event.Records[0].cf.request;
  
  // Implement geo-based routing
  const countryCode = request.headers['cloudfront-viewer-country'][0].value;
  if (countryCode === 'DE') {
    request.uri = `/de${request.uri}`;
  }
  
  return request;
}

Cloudflare Workers

Edge Processing

export default {
  async fetch(request: Request): Promise<Response> {
    // Cache configuration
    const cache = caches.default;
    const cacheKey = new Request(request.url, request);
    
    // Check cache first
    let response = await cache.match(cacheKey);
    if (response) return response;
    
    // Process at edge
    const data = await processAtEdge(request);
    response = new Response(JSON.stringify(data), {
      headers: {
        'Content-Type': 'application/json',
        'Cache-Control': 'public, max-age=3600'
      }
    });
    
    // Cache response
    await cache.put(cacheKey, response.clone());
    return response;
  }
};

Azure Static Web Apps

Configuration

staticwebapp.config.json:
{
  "routes": [
    {
      "route": "/api/*",
      "methods": ["GET"],
      "rewrite": "/api/index"
    }
  ],
  "navigationFallback": {
    "rewrite": "index.html",
    "exclude": ["/images/*.{png,jpg,gif}", "/css/*"]
  },
  "globalHeaders": {
    "content-security-policy": "default-src https: 'unsafe-eval' 'unsafe-inline'; object-src 'none'"
  },
  "responseOverrides": {
    "404": {
      "rewrite": "/404.html"
    }
  }
}

Best Practices

1. Performance Optimization

   • Edge caching

   • Request coalescing

   • Dynamic compression

   • Asset optimization

2. Security Implementation

   • Edge authentication

   • Request validation

   • Rate limiting

   • DDoS protection

3. Monitoring Strategy

   • Edge analytics

   • Performance metrics

   • Error tracking

   • Usage patterns

4. Development Workflow

   • Local testing

   • CI/CD integration

   • Version control

   • Deployment staging