Use of KOA framework

2022/7/21
A Study Day

name	Koa Use of framework
author	Bump
state	The end
brief introduction	How to use it after reading Koa The framework ~

Installation command

npm i -g koa-generator

Create project

koa2 -e  Project name 

Enter the project root directory to execute : npm install
stay package.json Modify the startup command to nodemon

Premise remember to install nodemon Oh …

Cross domain

install koa2-cors Solving cross domain problems

npm i -S koa2-cors

To configure :
stay app.js Add the following code before introducing the routing configuration

const cors=require('koa2-cors')
app.use(cors({
    
  origin:'*',
  allowMethods:['GET','POST','OPTIONS','PUT','DELETE'],
  allowHeaders:['authorization','token','Content-Type']
}))

database mysql

install mysql2

npm i -S mysql2

Encapsulated connection pool

Created in the root directory utils/dbpool.js

const mysql=require('mysql2/promise')
const pool=mysql.createPool({
    
  host:'localhost',
  port:3306,
  database:'dbshop',
  user:'root',
  password:'123456',
  connectionLimit:10
})
module.exports= pool;

Use

Import in a route file dbpool.js that will do , for example

Example

• How to insert records
  

encryption

adopt crypto To encrypt

• For example, the login registration password is encrypted

Installation dependency

npm i -S crypto

Encryption method

let The encrypted string =crypto.createHmac(‘sha256’, Key string ).update( password ).digest(‘base64’);

for example :

About me

personal Blog Online : Bump Study