angular2实现统一的http请求头方法

如下所示：

constructor(_backend: ConnectionBackend,_defaultOptions: RequestOptions,private appInitService: AppInitService) {
super(_backend,_defaultOptions);
}

get(url: string,options?: RequestOptionsArgs): Observable {
let optionBuf = new RequestOptions({
headers: this.defaultHeaders,params: {'token': this.appInitService.token}
});
//here extend options;
return super.get(url,optionBuf);
}
}

export function myHttpFactory(xhrBackend: XHRBackend,requestOptions: RequestOptions,appInitService: AppInitService): myHttp {
return new myHttp(xhrBackend,requestOptions,appInitService); // 创建myHttp对象
}

export const myHttpProvider = {
provide: myHttp,useFactory: myHttpFactory,deps: [XHRBackend,RequestOptions,AppInitService]
};

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