dynatrace-cordova-outsystems-plugin/node_modules/request/lib/multipart.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

'use strict'

var uuid = require('uuid')
  , CombinedStream = require('combined-stream')
  , isstream = require('isstream')


function Multipart (request) {
  this.request = request
  this.boundary = uuid()
  this.chunked = false
  this.body = null
}

Multipart.prototype.isChunked = function (options) {
  var self = this
    , chunked = false
    , parts = options.data || options

  if (!parts.forEach) {
    self.request.emit('error', new Error('Argument error, options.multipart.'))
  }

  if (options.chunked !== undefined) {
    chunked = options.chunked
  }

  if (self.request.getHeader('transfer-encoding') === 'chunked') {
    chunked = true
  }

  if (!chunked) {
    parts.forEach(function (part) {
      if (typeof part.body === 'undefined') {
        self.request.emit('error', new Error('Body attribute missing in multipart.'))
      }
      if (isstream(part.body)) {
        chunked = true
      }
    })
  }

  return chunked
}

Multipart.prototype.setHeaders = function (chunked) {
  var self = this

  if (chunked && !self.request.hasHeader('transfer-encoding')) {
    self.request.setHeader('transfer-encoding', 'chunked')
  }

  var header = self.request.getHeader('content-type')

  if (!header || header.indexOf('multipart') === -1) {
    self.request.setHeader('content-type', 'multipart/related; boundary=' + self.boundary)
  } else {
    if (header.indexOf('boundary') !== -1) {
      self.boundary = header.replace(/.*boundary=([^\s;]+).*/, '$1')
    } else {
      self.request.setHeader('content-type', header + '; boundary=' + self.boundary)
    }
  }
}

Multipart.prototype.build = function (parts, chunked) {
  var self = this
  var body = chunked ? new CombinedStream() : []

  function add (part) {
    if (typeof part === 'number') {
      part = part.toString()
    }
    return chunked ? body.append(part) : body.push(new Buffer(part))
  }

  if (self.request.preambleCRLF) {
    add('\r\n')
  }

  parts.forEach(function (part) {
    var preamble = '--' + self.boundary + '\r\n'
    Object.keys(part).forEach(function (key) {
      if (key === 'body') { return }
      preamble += key + ': ' + part[key] + '\r\n'
    })
    preamble += '\r\n'
    add(preamble)
    add(part.body)
    add('\r\n')
  })
  add('--' + self.boundary + '--')

  if (self.request.postambleCRLF) {
    add('\r\n')
  }

  return body
}

Multipart.prototype.onRequest = function (options) {
  var self = this

  var chunked = self.isChunked(options)
    , parts = options.data || options

  self.setHeaders(chunked)
  self.chunked = chunked
  self.body = self.build(parts, chunked)
}

exports.Multipart = Multipart