davidnum95

Observable.interval(3000)
            .do(value => console.log('attempt #', value))
            .switchMap(() => Observable.defer(() => this.http.get(url))
                  .map(data => data)
                  .catch(err => console.log(err))
            )
            .catch (err => Observable.empty())
            .subscribe(data => console.log(data));

public function behaviors()
    {
        return [
            'corsFilter' => [
                'class' => Cors::className(),
            ],
            'authenticator' => [
                'class' => HttpBearerAuth::className(),
                'except' => ['options'],
            ],
        ];
    }