Koa搭建基本服务器

│  server.js
│  
├─libs
│      database.js
│      
├─log
├─routers
│  │  static.js
│  │  
│  ├─admin
│  │      index.js
│  │      
│  ├─api
│  └─www
│          index.js
│          
├─static
│  └─upload
├─template
└─upload

cnpm i koa koa-router koa-better-body koa-ejs koa-session mysql co-mysql

const Router = require('koa-router');

router = new Router();
router.get('/',ctx=>{
    ctx.body='test'
});
module.exports = router.routes();

const static = require('koa-static');
module.exports = function(router,options){
    options = options||{};
    options.image = options.image||30;
    options.script = options.script||1;
    options.styles = options.styles||30;
    options.html = options.html||30;
    options.other = options.othre||7;
    router.all(/((\.jpg)|(\.png)|(\.gif))$/i,static('./static',{
        maxAge:options.image*86400*1000
    }));
    router.all(/((\.js)|(\.jsx))$/i,static('./static',{
        maxAge:options.script*86400*1000
    }));
    router.all(/((\.css))$/i,static('./static',{
        maxAge:options.styles*86400*1000
    }));
    router.all(/((\.html)|(\.htm))$/i,static('./static',{
        maxAge:options.html*86400*1000
    }));
    router.all(/\*/,static('./static',{
        maxAge:options.other*86400*1000
    }))
}

module.exports={
    DB_HOST:'localhost',
    DB_USER:'root',
    DB_PASS:'root',
    DB_NAME:'ches'
}

const mysql = require('mysql');
const co = require('co-mysql');
const config = require('../config')

let conn = mysql.createPool({
    host:config.DB_HOST,
    user:config.DB_USER,
    password:config.DB_PASS,
    database:config.DB_NAME
})

module.exports = co(conn);

/**生成sessionkey */
const fs = require('fs');

const KEY_LEN = 1024;
const KEY_COUNT = 2048;
const CHARS = 'abcdefghijklmnOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890<>?'
let arr = [];
for(let i=0;i<KEY_COUNT;i++){
    let key = ''
    for(let j=0;j<KEY_LEN;j++){
        key+=CHARS[Math.floor(Math.random()*CHARS.length)];
    }
    arr.push(key)
}
fs.writeFileSync('.keys',arr.join('\n'));
console.info(`生成${KEY_COUNT}keys`)

const Koa = require('koa');
const Router = require('koa-router');
const ejs = require('koa-ejs');
const static = require('./routers/static');
const body = require('koa-better-body');
const path = require('path');
const session = require('koa-session');
const fs = require('fs');
let server = new Koa();
server.listen(3000);
//中间件
//better-body
server.use(body({
    uploadDir:path.resolve(__dirname,'./static/upload')

}))

//session
server.keys = fs.readFileSync('.keys').toString().split('\n');
server.use(session({
    maxAge:20*60*1000,//20分钟过期
    renew:true
},server));
//数据库
server.context.db=require('./libs/database')//ctx的原型
let router = new Router();
//ejs

ejs(server,{
    root:path.resolve(__dirname,'template'),
    layout:false,
    viewExt:'ejs',
    cache:false,
    debug:false

});
//统一处理
// router.use(async(ctx,next)=>{
//     try{
//         await next();
//     }catch(e){
//         // ctx.state=500;
//         // ctx.body = '服务器内部错误'
//         ctx.throw('500','出差了')
//     }
// });
router.use('/admin',require('./routers/admin'));

router.use('/',require('./routers/www'));
static(router,{
    html:365
});

server.use(router.routes());