cnpm install -g koa-generator

// 這里一定要用koa2
koa2 /foo

app.use(require('koa-less')(__dirname + '/public'))

@import 'foo.less';
@import 'bar.less';

// 設置app keys，session會根據這個進行加密
app.keys = ['some secret hurr'];
// 配置session config
const CONFIG = {
  key: 'bougie:session',
  /** (string) cookie key (default is koa:sess) */
  maxAge: 1000 * 60 * 60 * 24 * 7,
  overwrite: true,
  /** (boolean) can overwrite or not (default true) */
  httpOnly: true,
  /** (boolean) httpOnly or not (default true) */
  signed: true,
  /** (boolean) signed or not (default true) */
  rolling: true,
  /** (boolean) Force a session identifier cookie to be set on every response. The expiration is reset to the original maxAge, resetting the expiration countdown. (default is false) */
  renew: false,
  /** (boolean) renew session when session is nearly expired, so we can always keep user logged in. (default is false)*/
};

// 應用中間件
app.use(session(CONFIG, app));

// 賦值
ctx.session.statu = value
// 取值
ctx.session.statu
// 刪除
ctx.session.statu = null

const proxy = require('koa-proxies')
app.use(proxy('/octocat', {
  target: 'https://api.github.com/users',  
  changeOrigin: true,
  agent: new httpsProxyAgent('http://1.2.3.4:88'),
  rewrite: path => path.replace(/^\/octocat(\/|\/\w+)?$/, '/vagusx'),
  logs: true
}))

ctx.query.param

ctx.params.id

ctx.request.body

ctx.body = yourData

ctx.render('layout', yourData)

const userAuth = (ctx, next) => {
  let isLogin = ctx.session.isLogin
  if(isLogin) return next()
}
router.use('/', userAuth)