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: struts2_namespace_ognl.rb
    path of file: ./repos/metasploit-framework/modules/exploits/multi/http
    
    the code of the file until where you have to start completion: ##
# This module 
    
  def profile_os
    # Probe for the target OS and architecture
    begin
      properties = send_profile()
      os = properties[:'os.name'].downcase
    rescue
      vprint_warning("Target profiling was unable to determine operating system")
      os = ''
      os = 'windows' if datastore['PAYLOAD'].downcase.include? 'win'
      os = 'linux'   if datastore['PAYLOAD'].downcase.include? 'linux'
      os = 'unix'    if datastore['PAYLOAD'].downcase.include? 'unix'
    end