You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: fileserve.rb
    path of file: ./repos/Cookbook/ruby/xmpp/examples/advanced
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby

require 'yaml'
require 'xmpp4r'
require 'xmpp4r/bytestreams'
require 'xmpp4r/roster'
require 'xmpp4r/version'

Jabber::debug = true

def human_readable(num)
  unit = ''
  units = %w(K M G T P E)
  while num > 10240 and units.size > 0
    num /= 1024
    unit = units.shift
  end
  "#{num} #{unit}B"
end

class Transfer
  attr_reader :peer, :filename, :bytes, :filesize

  def initialize(filetransfer, peer, filename, filesize, msgblock)
    @filetransfer = filetransfer
    @peer = peer
    @filename = filename
    @filesize = filesize
    @msgblock = msgblock

    @done = false
    @bytes = 0
    @stats = [0]
    @stats_lock = Mutex.new
    @stats_thread = Thread.new { stats_loop }


    @streamhost_cb = lambda { |streamho
    
  def initialize(conf)
    @uploads = 0
    @downloads = 0

    @transfers = []
    @transfers_lock = Mutex.new

    @client = Jabber::Client.new Jabber::JID.new(conf['jabber']['jid'])
    @client.connect
    @client.auth(conf['jabber']['password'])

    @ft = Jabber::FileTransfer::Helper.new(@client)
    Jabber::Version::SimpleResponder.new(@client,
                                       "XMPP4R FileServe example",
                                       Jabber::XMPP4R_VERSION,
                                       IO.popen('uname -sr').readlines.to_s.strip)
    register_handlers

    @directory = conf['directory']
    @directory.gsub!(/\/+$/, '')

    @socksserver = Jabber::Bytestreams::SOCKS5BytestreamsServer.new(conf['socks']['port'])

    conf['socks']['addresses'].each { |addr| @socksserver.add_address(addr) }

    @proxies = []
    conf['socks']['proxies'].collect { |jid|
      puts "Querying proxy #{jid}..."
      begin
        @proxies.push(Jabber::Bytestreams::SOCKS5Bytestreams::query_streamhost(@client, jid))
      rescue
        puts "Error: #{$!}"
      end