Middleware proxy pattern trong Next.js như thế nào?

Middleware có thể rewrite requests đến API khác: NextResponse.rewrite(new URL('/api/proxy', request.url)).

• Hoặc trong next.config.js dùng rewrites array để proxy: { source: '/api/:path', destination: 'https://backend.com/:path' }.
• Hữu ích để: hide API endpoints, implement BFF (Backend For Frontend), avoid CORS issues.

Middleware can rewrite requests to a different API: NextResponse.rewrite(new URL('/api/proxy', request.url)).

• Alternatively, use the rewrites array in next.config.js: { source: '/api/:path', destination: 'https://backend.com/:path' }.
• Useful for: hiding internal API endpoints, implementing a Backend For Frontend (BFF), and avoiding CORS issues.