question: global middleware for custom serialization

[tsedio]

question: global middleware for custom serialization

[Romakita]

Hi @WalterLeinert ,

You can create your own decorator or use the UseAfter decorator to add your own middleware on a method.

SendResponseMiddleware is the last middleware called for one method. After that, it's the global middleware witch handle the current request. The ReponseViewMiddleware is the right example to change the behavior outgoing response data. Try this : https://github.com/Romakita/ts-express-decorators/wiki/Middlewares#how-to-format-the-response-with-middleware.

See you :)
Romain

[WalterLeinert]

Hi Romain,

thank you for the answer and your hints.
As in SendResponseMiddleware I need global handling of requests/responses to serialize my data in one place. I dont want to decorate each corrresponding controller method.

Any idea?

Regards,
Walter

[Romakita]

Maybe you can use Converter to create a serializer for a Model (class). But I don't think if that answer to your need. See https://github.com/Romakita/ts-express-decorators/wiki/Converters

Other solution is to override the SendReponseMiddleware.use() method with the MiddlewareService.get(SendResponseMiddleware) //=>instance of middleware.

I haven't a mechanism to do that easily actually (except with the Converter).

See you,
Romain

[Romakita]

Hum maybe that will be works:

export class ExtendedSendResponseMiddleware extends SendResponseMiddleware {

   public use(@ResponseData() data: any, @Response() response: Express.Response) {

        /// place your code here ....

        
        return super.use(data, response);
    }
}

// it's hack
(MiddlewareService as any).middlewares.set(SendResponseMiddleware, {
    provide: SendResponseMiddleware, 
    useClass: ExtendedSendResponseMiddleware,
    type: 1
});

Maybe works ^^

[WalterLeinert]

Hi Romain,

Thank you for your proposal. I will try it tomorrow.

Regards, walter