old_contents: module.exports = {
    handler: function (req, res) {
      console.log(req.body)
      res.end('hello world')
    }
  }
  
new_contents: module.exports = {
    handler: function (req, res) {
      var body = []
      req.on('error', function (err) {
        console.error(err)
      }).on('data', function (chunk) {
        body.push(chunk)
      }).on('end', function () {
        body = Buffer.concat(body).toString()
        console.log(body)
        res.end(body)
      })
    }
  }
  
subject: Fix nodejs with data example