Quick script to help recover garbled base64 encoded mail attachments.

decode64.rb

# Quick script to help recover garbled base64 encoded mail attachments.
# Converts files in place.
# Usage:
#   # decode files in the current directory
#     ruby decode64.rb ./ file_one.jpg file_two.png file_three.gif
#   # decode files in another directory
#     ruby decode64.rb /path/to/else/where other.png estimate.doc

require 'base64'

dir = ARGV[0] # where files live
files = ARGV[1..-1] # base64 encoded files, maybe copied-n-pasted from Mail client

# convert decoded file
files.each do |filename|
  file = File.read(File.join(dir,filename))
  File.open(File.join(dir,filename), 'w+') do |new_file|
    new_file.print Base64.decode64(file)
  end
end