Format koa's respond json.

## Installation

```sh
$ npm install koahub-body-res
```

## Use with koa

```js
var app = require('koa')();
var koaRes = require('koahub-body-res');
app.use(koaRes());

this.data = 'This is a body';
this.msg = 'This is a msg';
this.go = 'This is a go url';

output

this.body = {
	code: 200,
	data: 'This is a body',
	msg: 'This is a msg'
}

this.body = {
    code: 200,
    data: 'This is a body',
    msg: 'This is a msg',
    go: 'This is a go url'
};

```

##
官网：[http://js.koahub.com](http://js.koahub.com)

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