Angular 2 Custom Error Handling and Router

Question

I have a custom exception handler that is supposed to take the user to a custom error page if any exception occurs(just trying it out).

I am trying to get the instance of the router using Injector. Reason for doing this, I believe the injector will give the existing router instance and using it i will be able to route the user.

Any ideas why this is not working or how this can be achieved ?

Thank You :)

@Injectable()
export class AppExceptionHandler extends ExceptionHandler{

constructor(){
    super(null, null);
}

call(exception:any, stackTrace?:any, reason?:string):void {
    console.log('call...')


    var providers = Injector.resolve([ROUTER_PROVIDERS]);
    var injector = Injector.fromResolvedProviders(providers);

    // this is causing issue, not sure it is the correct way
    let router : Router = injector.get(Router);

    // not executed
    console.log(router)

    // not executed 
    console.log('done...')
    router.navigate(["CustomErrorPage"]);
    }

}

---

Answer - tested in 2.0.0-beta.17 Thanks to Druxtan

1. Created a file app.injector.ts inside the app folder (app/app.injector.ts)

let appInjectorRef;

export const appInjector = (injector?) => {
    if (!injector) {
        return appInjectorRef;
    }

    appInjectorRef = injector;

    return appInjectorRef;
};

2. Added to the bootstrap in the main.ts 

bootstrap(AppComponent,[ROUTER_PROVIDERS, HTTP_PROVIDERS,provide(ExceptionHandler,{useClass : AppExceptionHandler})])
    .then((appRef) => appInjector(appRef.injector));

3. In the AppExceptionHandler, retrieved the Router instance as shown below

export class AppExceptionHandler {

    call(exception:any, stackTrace?:any, reason?:string):void {

        let injectorApp = appInjector();
        let router = injectorApp.get(Router);
        let localStorageService = injectorApp.get(LocalStorageService);

        if(exception.message === '-1'){
            localStorageService.clear();
            router.navigate(["Login"]);
        }
    }

}

Answer 1

I would implement your feature this way since this class takes place in the dependency injection:

@Injectable()
export class AppExceptionHandler extends ExceptionHandler {
  constructor(private router:Router) {
    super(null, null);
  }

  call(exception:any, stackTrace?:any, reason?:string):void {
    console.log('call...')

    this.router.navigate(['CustomErrorPage']);
  }
}

and register your handle this way:

bootstrap(MyApp, [
  provide(ExceptionHandler, {useClass: AppExceptionHandler})
]);