Carrierwave

gistfile1.rb

class UploadedFile < CarrierWave::Uploader::Base
  SEPARATOR = "\r\n".freeze
  attr_reader :body
  include CarrierWave::MimeTypes
  process :set_content_type

  def filename
    @name = key
  end

  def extension_white_list
    %w(pdf tiff tif)
  end

  def initialize(body)
    @body = body
  end

  # return boundary data
  def boundary
    @body.lines.first.strip.gsub(/^-*/, '')
  end

  # return file content
  def headers
    headers = {}
    @body.lines.each_with_index do |line, index|
      next if index == 0
      break if line.strip == ''

      key, value = *line.split(':')
      headers[key.strip] = value.strip
    end

    headers
  end

  # stripts boundaty data and headers from the file content
  def content
    first_line_index = 0
    @body.lines.each do |line|
      first_line_index += 1
      break if line.strip == ''
    end

    @body.lines.to_a[first_line_index..-2].join()[0..-3]
  end
end