upload image to a file server

upload_base64_image.rb

class UploadBase64Image < Dun::Activity
  data_reader :file_data, :as, :file_name
 
  set :server_address, 'http://xx.xx.xx.xx'
  set :client, RestClient
 
  def initialize(data)
    super
    default :as, 'image'
    default :file_name, SecureRandom.urlsafe_base64
  end
 
  def call
    client.post "#{server_address}/#{store_dir}/#{file_name}", file: file
  end
 
  private
 
  def store_dir
    "fchk/#{as}"
  end
 
  def file
    get_or_set :file do
      tempfile = Tempfile.new('fileupload')
      tempfile.binmode
      tempfile.write(Base64.decode64 file_data)
      File.new(tempfile.path, 'rb')
    end
  end
 
end