koa 初识

之前一直用的express，当作本地服务器测试使用，最近发现使用koa的同学比较多，就差看文档学习了一下，直接贴项目了.项目目录下运行指令

​

npm install
npm start

​

1. 项目目录

   ├── index.js
   ├── package-lock.json
   ├── package.json
   ├── public
   │   ├── css
   │   │   ├── style.css
   │   │   └── style1.css
   │   ├── index.html
   │   └── ts
   │       └── main.ts
   └── 
   

2. Index.js

   const Koa = require('koa');
   const app = new Koa();
   const route = require('koa-route');
   const serve = require('koa-static');
   const path = require('path');
    
   // 把静态页统一放到public中管理
   const home   = serve(path.join(__dirname)+'/public/');
   // hello接口
   const hello = ctx => {
     ctx.response.body = 'Hello World';
   };
    
   // route 测试
   app.use(home); 
   app.use(route.get('/hello', hello));
   
   app.listen(3000,function(){
   	console.log('server is running on port 3000')
   });
   
   

3. package.json

   {
     "name": "koaserver",
     "version": "1.0.0",
     "description": "koa 搭建server服务器 ",
     "main": "index.js",
     "scripts": {
       "test": "echo \"Error: no test specified\" && exit 1",
       "start": "node index.js"
     },
     "author": "",
     "license": "ISC",
     "dependencies": {
       "koa": "2.13.0",
       "koa-route": "3.2.0",
       "koa-static": "5.0.0",
       "path": "0.12.7"
     }
   }