angular2的angular-cli如何加载环境变量 [英] angular-cli for angular2 how to load environment variables

问题描述

我是angular-cli的新手，并希望通过env为我的api服务调用加载url.例如

I am new to the angular-cli and want to load url's for my api service calls by env. E.g.

local: http://127.0.0.1:5000
dev: http://123.123.123.123:80
prod: https://123.123.123.123:443

例如在environment.prod.ts

e.g. in environment.prod.ts

我认为这是

export const environment = {
  production: true
  "API_URL": "prod: https://123.123.123.123:443"
};

但是从angular2来说，我该如何调用才能获取API_URL?

But from angular2, how do I call so I can get API_URL?

例如

this.http.post(API_URL + '/auth', body, { headers: contentHeaders })
      .subscribe(
        response => {
          console.log(response.json().access_token);
          localStorage.setItem('id_token', response.json().access_token);
          this.router.navigate(['/dashboard']);
        },
        error => {
          alert(error.text());
          console.log(error.text());
        }
      );
  } 

谢谢

推荐答案

如果您查看angular-cli生成项目的根，您将在main.ts中看到:

If you look at the root of your angular-cli's generated project, you will see in main.ts :

import { environment } from './environments/environment';

要获取您的api URL，只需在服务标头中执行相同的操作.

To get your api URL, you just have to do the same in your service header.

环境路径取决于与环境文件夹相关的服务位置.对我来说，它是这样的:

The path to environment is depending on the position of your service related to the environment folder. For me, it works like this :

import { Http, Response } from '@angular/http';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { environment } from '../../environments/environment';

@Injectable()
export class ValuesService {
    private valuesUrl = environment.apiBaseUrl + 'api/values';
    constructor(private http: Http) { }

    getValues(): Observable<string[]> {
        return this.http.get(this.valuesUrl)
        .map(this.extractData)
        .catch(this.handleError);
    }

    private extractData(res: Response) {
        let body = res.json();
        return body || { };
    }

    private handleError(error: any) {
        let errMsg = (error.message) ? error.message :
        error.status ? `${error.status} - ${error.statusText}` : 'Server error';
        console.error(errMsg);
        return Observable.throw(errMsg);
    }
}

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