devfest2016_sample

발표자료: http://www.slideshare.net/kingori/ss-68326596

소켓서버 설정 방법

1. socket io master zip 다운로드
2. 서버가 ack 를 처리하도록 examples/chat/index.js 수정

```
socket.on('new message', function (data, ack) {
  // we tell the client to execute 'new message'
  socket.broadcast.emit('new message', {
    username: socket.username,
    message: data
  });
  if( ack) {
    ack('ack');
  }
});
```  

3. chat server 실행

```
$ cd socket.io
$ npm install
$ cd examples/chat
$ npm install
$ DEBUG=socket.io* node .
```