FTPSaving.rb

# FTP authentification -- see OVH FTP Backup guides
server, user, pass = ["your_server", "your_user", "your_pass"]

keep = 15  # keep last 15 days
what_to_save = ["/home/save/*.tar.gz"] # no subdirs

class SaveFtp
  require "net/ftp"
  require "time"

  def initialize(server, user, pass)
    @ftp = Net::FTP.new(server, user, pass)
  end
  
  def save(what_to_save)
    today = Time.now.strftime("%Y%m%d")
    @ftp.mkdir(today) rescue nil
    @ftp.chdir(today)
    what_to_save.each do |wts|
      Dir.glob(wts).each do |file|
        @ftp.putbinaryfile(file, file.split("/").last)
        puts "saving #{file} => #{@ftp.getdir}/#{file.split("/").last}"
      end
    end
  end
  
  def delete_remote_dir(from = "/", keep = 15)
    @ftp.chdir from
    (@ftp.nlst - [".", ".."]).each do |folder|
      begin
        @ftp.chdir folder
        todelete = @ftp.getdir
        if ((Time.now - Time.parse(folder)) / 24 / 60 / 60) > keep
          delete_remote_dir from + "/#{folder}"
          (@ftp.nlst - [".", ".."]).each do |file|
            @ftp.delete "#{todelete}/#{file}"
          end
          @ftp.chdir from
          @ftp.rmdir todelete
        else
          @ftp.chdir from
        end    
      rescue Exception => e
        puts "Error : #{e.inspect}"
      end
    end
  end

  def close
    @ftp.close
  end

end

myftp = SaveFtp.new server, user, pass
myftp.save what_to_save
myftp.delete_remote_dir "/", keep
myftp.close