gistfile1.txt

def create_upload_file(options = {})
  if options[:file]
    options = {
      "content_type" => "tmp",
      "size" => File.size?(options[:file].path),
      "tempfile" => options[:file],
      "original_filename" => options[:file].path.split(File::SEPARATOR).last
    }.merge(options)
  elsif options[:data] && options[:file_name]
    options = {
      "content_type" => "tmp",
      "size" => options[:data].size,
      "tempfile" => StringIO.new(options[:data]),
      "original_filename" => options[:original_filename]
    }.merge(options)
  else
    raise "You need to specify either :file or both :data and :original_filename for this method"
  end
  Hashie::Mash.new(options)
end