Find and download attachments in gmail's sent mail.

attachment_finder.rb

#! /usr/bin/env ruby

# tested with ruby-1.9.2p320
# no additional gems should be required as net/imap is
# part of the default "library"

require 'net/imap'

# imap server (gmail)
$server = 'imap.gmail.com'

# email address (login)
$account = 'account@gmail.com'

# password for account
$passwd = 'S0me_5ecuR3!pa$$WD%%'

# minimum size (this is a dumb check, but hopefully good enough.)
$min_attachment_size = 8192

# Should not need to edit below this.
####
imap = Net::IMAP.new($server, 993, true)

imap.login $account, $passwd
imap.examine '[Gmail]/Sent Mail'
imap.search(%w{ALL}).each do |msg_id|
  size = imap.fetch(msg_id, 'RFC822.SIZE').first.attr['RFC822.SIZE']
  next if size < $min_attachment_size
  p "msg '#{msg_id}' appears to meet size criteria, downloading"

  body = imap.fetch(msg_id, 'BODY').first.attr['BODY']
  i = 1

  until body.parts[i].nil?
    name = body.parts[i].param['NAME']
    i += 1

    attachment = imap.fetch(msg_id, "BODY[#{i}]").first.attr["BODY[#{i}]"]
    unless File.exists? name
      File.new(name, 'w').write attachment.unpack('m').first
      p "Wrote #{name}"
    else
      p "#{name} appears to exist already, skipping..."
    end
  end
end

imap.logout
imap.disconnect