重构及封装
## 重构笔记
- 关键代码
1. app.js
```js
import koa from "koa"
import router from "koa-router"
import bodyparser from "koa-bodyparser"
import { route } from "./router/index.js"
const app = new koa()
const Router = new router()
app.use(bodyparser())
// 找到并遍历所有指定路径下的js文件
app.use(route)
app.listen(4000)
```
2. books.js
```js
let list = async(ctx,next) =>{
console.log('图书列表');
ctx.body = '图书列表'
}
let list_Id = async(ctx,next) =>{
let Id = ctx.params.Id
ctx.body = '单个图书'
}
let list_add = async(ctx,next) =>{
ctx.body = '新增图书'
}
let list_update = async(ctx,next) =>{
let Id = ctx.params.Id
ctx.body = '修改图书'
}
let list_del = async(ctx,next) =>{
ctx.body = '删除'
}
export const obj = {
'get /books' : list,
'get /books/:id' :list_Id,
'post /books/' : list_add,
'put /books/:id' : list_update,
'delete /books' : list_del
}
```
3. router/index.js
```js
import Router from "koa-router"
import path from "path"
import {FAllCon,Reg} from "./utils.js"
let router =new Router()
/*
1. 注册路由【通过两个函数】【把 router 传进去】
2. 使用app.use(Router.routes())
*/
// 传路径
let dir = '../Controller'
// 找到所有的控制器文件
let controllers = FAllCon(dir)
// 注册路由
Reg(router,controllers)
/*
1. 具名导出
export let abc // import {abc} from ''
2. deefault {} 全场只能出现一个 default
export default {} // import x from ''
*/
export let route = router.routes();
```
4. router/utils.js
```js
import { log } from 'console';
import fs from 'fs'
import path from "path"
// 找到所有的控制器文件
function findAllControllers(ConDir){
// 使用绝对路径
const ab = `F:/123/28/Controller`
let aaa = fs.readdirSync(ab)
console.log(aaa);
if (fs.existsSync(ab)) {
let allFile = fs.readdirSync(ab)
let allConFiles = allFile.filter(x=>x.endsWith('.js')).map(x=>`file:///${ab}/${x}`)
return allConFiles
}
}
// 注册路由
function regRouter(router,controllers){
// 遍历所有的控制器，动态导入每个控制器模块
controllers.forEach(async file => {
// 动态导入模块
let {obj} = await import(file)
// 遍历对象
for (const key in obj) {
let x = key.split(' ')
console.log(x);
let [keyMethod,keyPath] = key.split(' ')
let keyFn = obj[key]
console.log(keyMethod);
if (keyMethod === 'get') {
router.get(keyPath,keyFn)
}
if (keyMethod === 'post') {
router.post(keyPath,keyFn)
}
if (keyMethod === 'delete') {
router.delete(keyPath,keyFn)
}
if (keyMethod === 'put') {
router.put(keyPath,keyFn)
}
}
});
}
export const FAllCon = findAllControllers
export const Reg = regRouter
```
5.
```h
@url = http://localhost:4000
###
GET {{url}}/blogs HTTP/1.1
Content-Type: application/json
{
"name":"巴拉巴拉"
}
###
get {{url}}/blogs/:id HTTP/1.1
```