generate base64 multipart messages

encode_images.rb

require 'base64'

cur_dir = File.dirname(File.expand_path(__FILE__))
img_dir = File.join cur_dir, 'images'

Dir.chdir cur_dir

Dir.glob("*.{jpg,png}").each do |filename|
  img = File.new(filename, 'r')
  encoded_data = Base64.encode64 img.read
  img.close
  File.open(File.join(img_dir, filename), 'w+') do |file|
    file.print "-----------------------------168072824752491622650073\r\n"
    file.print "Content-Disposition: form-data; name=\"photo[image]\"; filename=\"#{filename}\"\r\n"
    file.print "Content-Type: image/jpeg\r\n"
    file.print "Content-Transfer-Encoding: Base64\r\n"
    file.print "\r\n"
    file.print encoded_data
    file.print "\r\n"
    file.print "-----------------------------168072824752491622650073--"
  end
end