Angular2提供自定义Http不工作

import { Http,ConnectionBackend,Request,RequestOptions,RequestOptionsArgs,Response,Headers} from '@angular/http';
import { Router} from '@angular/router';
import { Injectable} from '@angular/core';
import { Observable} from 'rxjs/Rx';

@Injectable()


export class CustomHttp extends Http {

    constructor(backend: ConnectionBackend,defaultOptions: RequestOptions,private _router : Router) {
        super(backend,defaultOptions);
    }

    request(url: string | Request,options?: RequestOptionsArgs): Observable<Response> {
        return this.intercept(super.request(url,options));
    }

    get(url: string,options?: RequestOptionsArgs): Observable<Response> {
        return this.intercept(super.get(url,options));
    }

    post(url: string,body: string,options?: RequestOptionsArgs): Observable<Response> {
        return this.intercept(super.post(url,body,this.getRequestOptionArgs(options)));
    }

    put(url: string,options?: RequestOptionsArgs): Observable<Response> {
        return this.intercept(super.put(url,this.getRequestOptionArgs(options)));
    }

    delete(url: string,options?: RequestOptionsArgs): Observable<Response> {
        return this.intercept(super.delete(url,options));
    }

    getRequestOptionArgs(options?: RequestOptionsArgs): RequestOptionsArgs {
        if (options == null) {
            options = new RequestOptions();
        }
        if (options.headers == null) {
            options.headers = new Headers();
        }
        options.headers.append('Content-Type','application/json');
        return options;
    }

    intercept(observable: Observable<Response>): Observable<Response> {
        return observable.catch((err,source) => {
            console.log('CustomHttp Error status:  ' + err.status);
            return Observable.throw(err); 
        });
    }

}

这是我如何引导我的应用程序并尝试用我的实现替换默认HTTP：

import { bootstrap }    from '@angular/platform-browser-dynamic';
import { AppComponent } from './app.component';
import { HTTP_PROVIDERS,Http,XHRBackend,RequestOptions} from '@angular/http';
import { ROUTER_DIRECTIVES,Router } from '@angular/router';
import { APP_ROUTER_PROVIDERS  } from './app.routes';
import { provide,PLATFORM_DIRECTIVES} from '@angular/core';
import { LocationStrategy,HashLocationStrategy } from '@angular/common';
import { CustomHttp } from './utils/http/customhttp';


    bootstrap(AppComponent,[
        APP_ROUTER_PROVIDERS,HTTP_PROVIDERS,provide(LocationStrategy,{ useClass: HashLocationStrategy }),provide(PLATFORM_DIRECTIVES,{ useValue: [ROUTER_DIRECTIVES],multi: true }),provide( Http,{
            useFactory: (xhrBackend: XHRBackend,requestOptions: RequestOptions,router: Router) => new CustomHttp(xhrBackend,requestOptions,router),deps: [XHRBackend,Router]
        }),]);

没有编译错误但是当我尝试使用默认提供程序而不是我的实现来创建一些http请求时.我知道这是因为我故意调用一个返回500的webapi端点,并且不设置为我的catch子句并写一个日志语句.

以下是我的js依赖：

"dependencies": {
    "@angular/common": "2.0.0-rc.4","@angular/compiler": "2.0.0-rc.4","@angular/core": "2.0.0-rc.4","@angular/forms": "0.2.0","@angular/http": "2.0.0-rc.4","@angular/platform-browser": "2.0.0-rc.4","@angular/platform-browser-dynamic": "2.0.0-rc.4","@angular/router": "3.0.0-beta.1","@angular/router-deprecated": "2.0.0-rc.2","@angular/upgrade": "2.0.0-rc.4","systemjs": "0.19.27","core-js": "^2.4.0","reflect-metadata": "^0.1.3","rxjs": "5.0.0-beta.6","zone.js": "^0.6.12","lodash": "4.13.1","angular2-in-memory-web-api": "0.0.14","bootstrap": "^3.3.6"
  }

我在这里缺少什么胶水？