const HttpDataParser = require('@slaviczavik/http-data-parser')

// A boundary must be extracted from 'content-type' request header.
const boundary = '--------------------------034172598905589540726558'
const parser = HttpDataParser(boundary)

parser.on('header', function (data, isLast) {
  // Save headers somewhere...

  if (isLast) {
    // Here you may prepare for handling body data,
    // like create a writable stream and so on.
  }
})

parser.on('data', function (data) {
  // Save body content somewhere...
})

parser.on('part', function () {
  // We reached the end of one body part.
  // Here we can concate body content together.
})

parser.on('end', function () {
  // We reached the end of whole body.
  // No other data will come.
})

req.on('data', function (data) {
  parser.write(data)
})

req.on('end', function () {
  parser.end()
})