ekoa：我想把Koa 2.x写的跟express一样

koa 2.x use express-style middlewares

Features

• app.use = app.em = app.expressmiddleware 支持Express风格的中间件
• app._use 依然可以使用Koa 2.x的三种中间件

Install

$ npm i -S ekoa

Usages

最常见的用法

const Koa = require('ekoa')
const app = new Koa()

// log1
app.use(function(req, res, next){
  const start = new Date();
  return next().then(() => {
    const ms = new Date() - start;
    console.log(`${req.method} ${req.url} - ${ms}ms`);
  });
})

// log2
app.use(function(req, res, next){
  console.log('start')
  next()
})

app.use(function(req, res, next){
  console.log('process')
  res.body = "Hello Koa 1";
})

// response
app._use(ctx => {
  ctx.body = 'Hello Koa 2'
})

app.run(4000)

支持async函数

const Koa = require('.')
const app = new Koa('sss',{})

// log1
app.use(async function(req, res, next){
  const start = new Date();
  await next()
  
  const ms = new Date() - start;
  console.log(`${req.method} ${req.url} - ${ms}ms`);
})

// log2
app.use(async function(req, res, next){
  console.log('start')
  await next()
})

app.use(function(req, res, next){
  console.log('process')
  res.body = "Hello Koa 1";
})

// response
app._use(ctx => {
  ctx.body = 'Hello Koa 2'
})

app.run(4000)

通过runkoa执行即可（或babel，或者node 7+）

可使用的express风格的中间件

app.em = app.expressmiddleware

正常写法

function(req, res, next){
  console.log('start')
  
  return next().then(function (){
    console.log('end')
  })
}

next和koa commonfunction中的next是一样的。

更简单的写法

app.use(function(req, res, next){
  console.log('start')
  next()
})

中间件正常写法

function(req, res){
  res.body = "xxx"
}

此种写法有先后顺序，没有next中间件就不会向下传递。

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

版本历史

• v1.0.0 初始化版本

欢迎fork和反馈

• write by i5ting [email protected]

如有建议或意见，请在issue提问或邮件

License

this repo is released under the MIT License.