Is it possible to apply a middleware for all routes (globally)?

I’d like to apply a middleware for all routes, but apparently the forRoutes() config is needed. Is there a way to apply the middleware for all routes in the app.module ?

My use case is the JWT authentication for a REST Api which should be active for all endpoints.

export class AppModule {
  configure(consumer: MiddlewaresConsumer) {
    consumer.apply(AuthMiddleware);
  }
}

[Mesko89]

You can also use forRoutes({ path: '*', method: RequestMethod.ALL }):

export class AppModule {
  configure(consumer: MiddlewaresConsumer): void {
    consumer
      .apply([AuthMiddleware])
      .with('AppModule')
      .forRoutes({ path: '*', method: RequestMethod.ALL });
  }
}

[felixhayashi]

Hi @kamilmysliwiec,

thanks for your reply.

The section regarding global middlewares does not include a note about that only functional middlewares are possible on a “global” level.

I would recommend to add: “Accessing the DI container in a global middleware is not possible, you need to use a functional middleware instead when using app.use();”

The section about functional middlewares also does not conatin such a hint. Maybe it could be extended to:

Consider using the simpler functional middleware alternative any time your middleware doesn’t need any dependencies or if you need to register the middleware as global middleware.

Finally, in the section about DI it starts of with the claim:

Nest middleware fully supports Dependency Injection.

Which does not seem to be true for global middlewares.

The only part I found where it is implicitly communicated, that DI is impossible for global DI is this part in the section about DI.

Just as with providers and controllers, they are able to inject dependencies that are available within the same module. As usual, this is done through the constructor

May I ask, whether you ever considered also making the services, that are publicly exposed by the different modules via providers, available to global middlewares via DI?

Anyhow, the .forRoutes('*') technique to listen to all requests works fine for me now.

Offtopic: thanks for the great framwork, it is great to see somebody being dedicated to the idea of improving the architecture of nodejs backends 👍