How to implement media-type-versioning in NestJs?

Question

When using media-type-versioning, different versions of an endpoint should have the same URL and the client can set the Accept header to the desired version: e.g.

Accept: application/vnd.adventure-works.v1+json

For version 2:

Accept: application/vnd.adventure-works.v2+json

Pseudo code for controller:

    @Controller('orders')
    export class OrdersController {
    
      @Get('orders/:id')
      getOrdersV1(@Headers('Accept') acceptHeader: string) {
        // accept header must be 'application/vnd.adventure-works.v1+json'
        return {
          orderId: 1,
          orderName: 'Order 1'
        };
      }
    
      @Get('orders/:id')
      getOrdersV2(@Headers('Accept') acceptHeader: string) {
        // accept header must be 'application/vnd.adventure-works.v2+json'
        return {
          orderId: 1,
          name: 'Order 1'
        };
      }

• How can we implement this in NestJs?
  i.e. I need to somehow tell the NestJs router that the endpoint corresponding function should only be called when the accept-header has a fixed value:
• will this work with nestjs-swagger?

Update

found a related feature request: #3569

Answer 1

you may try this:

  @Get('orders/:id')
  getOrders(@Headers('Accept') acceptHeader: string) {
    //Implement a manager class say OrderManager
    OrderManager orderManager = new OrderManager(); // Better to @Inject in constructor
    switch(acceptHeader) {
        case ''application/vnd.adventure-works.v1+json'':
            return orderManager.getOrdersV1();
        case ''application/vnd.adventure-works.v2+json'':
            return orderManager.getOrdersV2();
        default:
            // throw new InvalidInputException() if needed
            break;
    }
  }