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: browser_exploit_server.rb
    path of file: ./repos/metasploit-framework/lib/msf/core/exploit/remote
    
    the code of the file until where you have to start completion: # -*- coding: binary -*-

require 'erb'
require 'cgi'
require 'date'
require 'set'
require 'rex/exploitation/js'
###
#
# The BrowserExploitServer mixin provides methods to do common tasks seen in modern browser
# exploitation, and is designed to work against common setups such as on Windows, OSX, and Linux.
# Note that this mixin is designed to be compatible with both Exploit and Auxiliary modules.
# Wiki documentation
    
    def cleanup
      super
      # Whoever registered BrowserProfilePrefix should do the cleanup
      clear_browser_profiles unless self.datastore['BrowserProfilePrefix']
    end

    # Returns the custom 404 URL set by the user
    #
    # @return [String]
    def get_custom_404_url
      datastore['Custom404'].to_s
    end


    # Returns the resource (URI) to the module to allow access to on_request_exploit
    #
    # @return [String] URI to the exploit page
    def get_module_resource
      "#{get_resource.to_s.chomp("/")}/#{@exploit_receiver_page}/"
    end


    # Returns the absolute URL to the module's resource that points to on_request_exploit
    #
    # @return [String] absolute URI to the exploit page
    def get_module_uri
      "#{get_uri.chomp("/")}/#{@exploit_receiver_page}"
    end


    # Returns the current target
    def get_target
      @target
    end


    # Returns a hash of recognizable requirements
    #
    # @param reqs [Hash] A hash that contains data for the requirements
    # @return [Hash] A hash of requirements
    def extract_requirements(reqs)
      tmp = reqs.select {|k,v| REQUIREMENT_KEY_SET.include?(k.to_s)}
      # Make sure keys are always symbols
      Hash[tmp.map{|(k,v)| [k.to_sym,v]}]
    end


    # Sets the target automatically based on what requirements are met.
    # If there's a possible matching target, it will also merge the requirements.
    # You can use the get_target() method to retrieve the most current target.
    #
    # @param profile [Hash] The profile to check
    def try_set_target(profile)
      return unless self.respond_to?(:targets)
      match_counts        = []
      target_requirements = {}
      targets.each do |t|
        target_requirements = extract_requirements(t.opts)
        if target_requirements.blank?
          match_counts << 0
        else
          match_counts << target_requirements.select { |k,v|
            if v.is_a? Regexp
              profile[k] =~ v
            else
              profile[k] == v
            end
          }.length
        end
      end