백엔드 렌더링 매개변수를 Angular 2 부트스트랩 방법에 어떻게 전달할 수 있나요?

import { bootstrap } from '@angular/platform-browser-dynamic';
import { AppComponent } from "./app.component.ts";

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

// Pass headers to bootstrap method using dependency injection
bootstrap(AppComponent, [{provide: 'headers', useValue: headers}]);

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

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

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

// Pass the custom request options to the bootstrap method
bootstrap(AppComponent, [{provide: BaseRequestOptions, useValue: headers}]);

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

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