angular2 resolveAndCreate HTTP-RC7中缺少HTTP_PROVIDERS

Question

回到RC4，当存在HTTP_PROVIDERS时，我可以使用创建我的自定义http实例

export function createHTTP(url:string, headers?:Headers){
  let injector = ReflectiveInjector.resolveAndCreate([
    myHttp,
    {provide:'defaultUrl', useValue:url},
    {provide:'defaultHeaders', useValue:headers || new Headers()},
    ...HTTP_Providers
  ])
  return injector.get(myHttp)
}

myHttp是Http的包装器

@Injectable()
export class myHttp{
  constructor(@Inject('defaultUrl) private url:string, @Inject('defaultHeaders) private headers:Headers, private http:Http){}

  get()
  put()...
}

现在已弃用并删除了HTTP_PROVIDERS，如何提供它？

谢谢！

Answer 1

@NgModule({
  imports: [HttpModule],
  ...
})
class AppModule {}

或将Angular2源中HTTP_PROVIDERS的定义复制到您的源中，并像以前一样在此处使用它。

const HTTP_PROVIDERS = [
    {provide: Http, useFactory: 
      (xhrBackend: XHRBackend, requestOptions: RequestOptions): Http =>
          new Http(xhrBackend, requestOptions), 
          deps: [XHRBackend, RequestOptions]},
    BrowserXhr,
    {provide: RequestOptions, useClass: BaseRequestOptions},
    {provide: ResponseOptions, useClass: BaseResponseOptions},
    XHRBackend,
    {provide: XSRFStrategy, useFactory: () => new CookieXSRFStrategy()},
];

您也可以使用以下提供者自己创建注射器

let resolvedProviders = ReflectiveInjector.resolve(HTTP_PROVIDERS);
let injector = ReflectiveInjector.fromResolvedProviders(resolvedProviders, /* this.injector (parent injector if any) */ );
var http = child.get(Http);

另请参阅以角度2手动注入Http