基于angular2 的 http服务封装的实例代码
小处成就大事 人气:0最近在项目中折腾了下angular2,所以出来跟大家分享，希望有帮助，每个公司业务不一样，按实际情况而定，个人学习心得，不作为标准。
1、定义http-interceptor.service.ts服务，统一处理http请求
/**
* name:http服务
* describe:对http请求做统一处理
* author:Angular那些事
* date:2017/6/3
* time:11:29
*/
import {Injectable} from '@angular/core';
import {Http, Response} from '@angular/http';
import 'rxjs/add/operator/toPromise';
@Injectable()
export class HttpInterceptorService {
constructor(private http: Http) {
}
/**
* 统一发送请求
* @param params
* @returns {Promise<{success: boolean, msg: string}>|Promise<R>}
*/
public request(params: any): any {
if (params['method'] == 'post' || params['method'] == 'POST') {
return this.post(params['url'], params['data']);
}
else {
return this.get(params['url'], params['data']);
}
}
/**
* get请求
* @param url 接口地址
* @param params 参数
* @returns {Promise<R>|Promise<U>}
*/
public get(url: string, params: any): any {
return this.http.get(url, {search: params})
.toPromise()
.then(this.handleSuccess)
.catch(res => this.handleError(res));
}
/**
* post请求
* @param url 接口地址
* @param params 参数
* @returns {Promise<R>|Promise<U>}
*/
public post(url: string, params: any) {
return this.http.post(url, params)
.toPromise()
.then(this.handleSuccess)
.catch(res => this.handleError(res));
}
/**
* 处理请求成功
* @param res
* @returns {{data: (string|null|((node:any)=>any)
*/
private handleSuccess(res: Response) {
let body = res["_body"];
if (body) {
return {
data: res.json().content || {},
page: res.json().page || {},
statusText: res.statusText,
status: res.status,
success: true
}
}
else {
return {
statusText: res.statusText,
status: res.status,
success: true
}
}
}
/**
* 处理请求错误
* @param error
* @returns {void|Promise<string>|Promise<T>|any}
*/
private handleError(error) {
console.log(error);
let msg = '请求失败';
if (error.status == 400) {
console.log('请求参数正确');
}
if (error.status == 404) {
console.error('请检查路径是否正确');
}
if (error.status == 500) {
console.error('请求的服务器错误');
}
console.log(error);
return {success: false, msg: msg};
}
}
2、在每一个模块创建一个service，service定义此模块的所有http数据请求，我这里演示登录模块：login.service.ts
/**
* name:登录服务
* describe:请输入描述
* author:Angular那些事
* date:2017/6/1
* time:00:13
*/
import {Injectable} from '@angular/core';
import {HttpInterceptorService} from 'app/commons/service/http-interceptor.service'
@Injectable()
export class LoginService {
constructor(private httpInterceptorService: HttpInterceptorService) {
}
/**
* 登陆功能
* @param params
* @returns {Promise<{}>}
*/
login(userName: string, passWord: string) {
return this.httpInterceptorService.request({
method: 'POST',
url: 'http://119.232.19.182:8090/login',
data: {
loginName: userName,
password: passWord
},
});
}
/**
* 注册
* @param user
* @returns {any}
*/
reguster(user: any) {
return this.httpInterceptorService.request({
method: 'POST',
url: 'http://119.232.19.182:8090/reguster',
data: {
user: user
},
});
}
}
3、在component注入servicelogin.service.ts。调用seriveLogin.service.ts服务定义的方法，这里通过login.component.ts演示
/**
* name:登录组件
* describe:请输入描述
* author:Angular那些事
* date:2017/6/1
* time:00:30
*/
import {Component} from '@angular/core'
import {LoginService} from './login.service'
@Component({
selector: 'login',
templateUrl: './login.component.html',
providers: [LoginService],
})
export class LoginComponent {
private userName: string;
private passWord: string;
constructor(private loginService: LoginService) {
}
/**
* 登录
*/
toLogin() {
this.loginService.login(this.userName, this.passWord).then(result => {
console.log(result);//打印返回的数据
});
}
}
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