Backend API

To stream video rendering progress via Server-Sent Events, you implement SSE endpoints in Express that maintain an open connection and push incremental updates to the client as the render task progresses.

The best way to validate Express API requests is to centralize input validation using TypeScript types, ensuring typed request shapes from your types file are strictly enforced before route handlers process the data.

You structure consistent error handling by applying standard HTTP status codes and returning uniform JSON error response formats across all Express routes, centralizing the logic to improve API maintainability.

Yes, your Express API needs a health check endpoint for video rendering orchestration and monitoring, allowing orchestration tools to verify service availability and operational status before routing traffic.

Yes, you can use Express for long-running video rendering tasks without blocking other requests by implementing Server-Sent Events to stream progress asynchronously, keeping the main event loop free for incoming traffic.

To separate concerns when defining Express routes, you isolate request validation, business logic, and streaming progress into distinct modules, ensuring the route handler in server/index.ts only orchestrates the workflow.