バックエンドでレンダリングされたパラメーターを Angular2 ブートストラップ メソッドに渡すにはどうすればよいですか?

var headers = ... // Retrieve headers from the server

bootstrap(AppComponent, [{ provide: 'headers', useValue: headers }]);

class SomeComponentOrService {
   constructor(@Inject('headers') private headers) {}
}

class MyRequestOptions extends BaseRequestOptions {
  constructor(private headers) {
    super();
  }
} 

var values = ... // Fetch headers from the server
var headers = new MyRequestOptions(values);

bootstrap(AppComponent, [{ provide: BaseRequestOptions, useValue: headers }]);

class ConfigService {
  constructor(private http: Http, @Inject(BaseRequestOptions) private baseRequestOptions) { }
}

function loadContext(context: ContextService) {
  return () => context.load();
}

@NgModule({
  ...
  providers: [ ..., ContextService, { provide: APP_INITIALIZER, useFactory: loadContext, deps: [ContextService], multi: true } ],

Instead of directly injecting `MyDependency`:

setTimeout(() => this.router = injector.get(Router));