express、lodash、validator搭建服务端接口

1、安装4个拓展（express、lodash、validator、body-parser）

npm intall express
npm intall lodash
npm intall validator
npm intall body-parser

2、新建route.js文件

const express = require('express')
const router = express.Router();
var validator = require('validator')
var isEmpty = require('lodash/isEmpty')

const validatorInput = (data) => {
    let errors = {}
    if(validator.isEmpty(data.username)){
        errors.username = '用户名不能为空'
    }
    if(validator.isEmpty(data.password)){
        errors.username = '密码不能为空'
    }
    if(validator.isEmail(data.email)){
        errors.username = '邮箱不能为空'
    }
    if (!validator.equals(data.password, data.passwordConfirmation)){
        errors.passwordConfirmation = '两次密码不一致'
    }
    return {
        isValid: !isEmpty(errors),
        errors
    }
}

router.post("/register", (req, res) => {
    const {isValid, errors} = validatorInput(req.body)

    if (!isValid){
        res.status(400).json(errors)
    }else{
        res.send({
            msg: 'success'
        })
    }
})
module.exports = router

3、新建index.js文件

const express = require('express')
const app = express();

const router = require("./router")

const bodyparser = require('body-parser')

app.use(bodyparser.urlencoded({
 extended: true
}))

app.use('/api', router)

app.listen(3300, () => {
 console.log('服务启动了（八点博客）')
})

4、运行index.js文件

node index.js

5、访问

http://localhost:3300/api/register