import { Injectable } from '@angular/core'; import { Http, Headers, RequestOptions, Response } from

最新推荐文章于 2024-04-01 03:50:45 发布

AndrewDengpf

最新推荐文章于 2024-04-01 03:50:45 发布

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分类专栏： Angular2/4

本文链接：https://blog.youkuaiyun.com/andrewDengpf/article/details/75012420

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这篇博客探讨了如何在Angular应用中使用`@Injectable`装饰器创建服务，并利用`Http`模块进行HTTP请求，获取远程数据。通过访问提供的链接http://47.92.39.225:8080/可以了解更多相关内容。

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定义一个Angular2/4 service:

import { Injectable } from '@angular/core';
import { Http, Headers, RequestOptions, Response } from '@angular/http';
 
import { User } from '../_models/index';
 
@Injectable()
export class UserService {
    constructor(private http: Http) { }
 
    getAll() {
        return this.http.get('/api/users', this.jwt()).map((response: Response) => response.json());
    }
 
    getById(id: number) {
        return this.http.get('/api/users/' + id, this.jwt()).map((response: Response) => response.json());
    }
 
    create(user: User) {
        return this.http.post('/api/users', user, this.jwt()).map((response: Response) => response.json());
    }
 
    update(user: User) {
        return this.http.put('/api/users/' + user.id, user, this.jwt()).map((response: Response) => response.json());
    }
 
    delete(id: number) {
        return this.http.delete('/api/users/' + id, this.jwt()).map((response: Response) => response.json());
    }
 
    // private helper methods
 
    private jwt() {
        // create authorization header with jwt token
        let currentUser = JSON.parse(localStorage.getItem('currentUser'));
        if (currentUser && currentUser.token) {
            let headers = new Headers({ 'Authorization': 'Bearer ' + currentUser.token });
            return new RequestOptions({ headers: headers });
        }
    }
}