小编Dee*_*eej的帖子

我正在尝试在Angular 2中创建一个通用数据服务,我遇到了一个奇怪的错误.本质上,我正在创建一个HTTP服务,其方法包含api url的一部分,以便我可以将它用于多种情况.例如,我想传递'projects /'并加入'api /'来获取'api/projects /'然后我可以在http调用中使用它.

我目前的dataService.ts:

import { Injectable } from '@angular/core';
import { Http, Response, Headers } from '@angular/http';
import 'rxjs/add/operator/map'
import { Observable } from 'rxjs/Observable';
import { Configuration } from '../app.constants';

@Injectable()
export class DataService {

    private actionUrl: string;
    private headers: Headers;

    constructor(private _http: Http, private _configuration: Configuration, public action: string) {

    this.actionUrl = _configuration.ApiUrl

    this.headers = new Headers();
    this.headers.append('Content-Type', 'application/json');
    this.headers.append('Accept', 'application/json');
    }

    public GetAll (action: string): Observable<any> {
        return this._http.get(this.actionUrl + action).map((response: Response) => …