gistfile1.rb

require 'gmail'
require 'net/ftp'

local_path = "tmp"

def ftp_to_bluehost(file)  
  ftp_user = "user@domain.com"
  ftp_pass = "pass"
  ftp_host = "ftp.domain.com"
  ftp_port = 21
  remote_file_path = "remote"
  
  ftp = Net::FTP.new
  ftp.connect(ftp_host,ftp_port)
  ftp.login(ftp_user,ftp_pass)
  ftp.mkdir(remote_file_path) if ftp.ls.include?(remote_file_path)
  ftp.chdir(remote_file_path)
  ftp.putbinaryfile(file)
  ftp.close
end

def get_bluehost_file(file, local_path)
  ftp_user = "user@domain.com"
  ftp_pass = "pass"
  ftp_host = "ftp.domain.com"
  ftp_port = 21
  remote_file_path = "remote"
  
  ftp = Net::FTP.new
  ftp.connect(ftp_host,ftp_port)
  ftp.login(ftp_user,ftp_pass)
  ftp.chdir(remote_file_path)
  ftp.getbinaryfile(file, "tmp/#{file}")
  
  ftp.close
end

def delete_tmp_dir(local_path)
  Dir.foreach(local_path) { |file| puts file; File.delete("#{local_path}/#{file}") unless file == "." || file == ".."}
end

#working in 1.9.3
gmail = Gmail.connect('user@gmail.com', 'pass') 
gmail.inbox.emails.each do |email|
  email.message.attachments.each do |f|
    f.filename.match(/[\w+-_ ]+.(\w{3})/)
    puts "extension for #{f.filename} is #{$1}"
    File.write(File.join(local_path, f.filename), f.body.decoded)
    ftp_to_bluehost(File.join(local_path, f.filename))
    delete_tmp_dir(local_path)
    get_bluehost_file(f.filename, "#{local_path}/#{f.filename}")
  end
end

gmail.logout