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You Probably Don't Know How to Write APIs Like This Using Express
- The article discusses how n8n approaches API development differently from traditional Express setups.
- Instead of the usual route-controller-service flow, n8n utilizes a more TypeScript-heavy, decorator-driven approach resembling NestJS.
- n8n's Server.ts file sets up an Express-based API dynamically loading controllers, handling webhooks, middleware, and frontend assets.
- API routes in n8n are defined using TypeScript decorators, eliminating the need for explicit route definitions in traditional Express.
- @RestController decorator in n8n registers entire controllers automatically, simplifying route mapping.
- An example with ActiveWorkflowsController showcases how decorators handle routing, authentication, and validation in n8n.
- n8n employs a service layer with dependency injection for managing services like ActiveWorkflowsService.
- By using decorators and dependency injection, n8n keeps its API modular, maintainable, and extensible.
- The article suggests considering n8n's structure with decorators and dependency injection for API-heavy applications.
- Additionally, it introduces LiveAPI, a tool for quick API documentation generation and execution directly from the browser.
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