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CoffeeScriptでkoaを使う

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話題のkoaをCoffeeScriptで試してみようと思ったところ

function *() { } をどのように書いたらいいのかわからず
https://github.com/jashkenas/coffee-script/pull/3240
にpull requestがあったので早速試してみた

git clone https://github.com/alubbe/coffee-script
cd coffee-script 
npm install 

node v0.11では yieldを有効にするために bin/coffee に--harmonyを付ける

#!/usr/bin/env node --harmony

公式のサンプルをCofeeScriptで書いてみた

koa = require('koa')
app = koa()

app.use ->*
  @body = "Hello, World"

app.listen 3000
koa = require('koa')
app = koa()

# x-response-time
app.use (next) ->*
  start = new Date
  yield next
  ms = new Date - start
  @set 'X-Response-Time', "#{ms}ms"

# logger
app.use (next) ->*
  start = new Date
  yield next
  ms = new Date - start
  console.log "#{@method} #{@url} - #{ms}"

# response
app.use (next) ->*
  @body = 'Hello World'

app.listen 3000
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