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koa-sample's Introduction

Koa 篇

Koa 是目前最流行的基于Node.js平台的web开发框架,利用 async 函数,Koa 丢弃了回调函数,并有力地增强错误处理。 Koa 并没有捆绑任何中间件,给人一种干净利落的感觉,体积小、编程方式干净

一、koa-router

多路由拆分到controller 目录

二、koa-body

koa-body 简化请求数据解析,也可以使用 koa-body 接受文件

const koaBody = require('koa-body')  //接受请求传入的参数

// 接受post参数解析
index.use(koaBody({
    multipart: true
}))


// 使用
const bodyData = ctx.request.body // post请求body

const params = ctx.request.query // get请求的params

三、koa-static 静态文件中间件

设置静态文件目录,生成图片链接

四、使用Sequelize操作数据库

npm install mysql2 sequelize -s

  • 1、封装数据库操作,查看 utils/db.js

  • 2、创建数据表对应的模型对象,查看 model/Leida.js

  • 3、基本使用,查看 controller/leida.js

五、nodemon 自动重启服务

nodemon用来监视node.js应用程序中的任何更改并自动重启服务

nodemon src/index.js 启动命令

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