Class: Wmap::HostTracker::PrimaryHost

Inherits:
Wmap::HostTracker show all
Includes:
Singleton, Utils
Defined in:
lib/wmap/host_tracker/primary_host.rb

Overview

Class to differentiate the primary host-name from the potential aliases. This is needed in order to minimize the confusion on our final site inventory list, as it contains a large number of duplicates (aliases). More specifically, a filter could be built by using this class to track the primary url of a website.

Constant Summary

Constants included from Utils::UrlMagic

Utils::UrlMagic::Max_http_timeout

Constants included from Utils::DomainRoot

Utils::DomainRoot::File_ccsld, Utils::DomainRoot::File_cctld, Utils::DomainRoot::File_gtld, Utils::DomainRoot::File_tld

Instance Attribute Summary collapse

Attributes inherited from Wmap::HostTracker

#alias, #max_parallel

Instance Method Summary collapse

Methods included from Utils

#cidr_2_ips, #file_2_hash, #file_2_list, #get_nameserver, #get_nameservers, #host_2_ip, #host_2_ips, #is_cidr?, #is_fqdn?, #is_ip?, #list_2_file, #reverse_dns_lookup, #sort_ips, #valid_dns_record?, #zone_transferable?

Methods included from Utils::Logger

#wlog

Methods included from Utils::UrlMagic

#create_absolute_url_from_base, #create_absolute_url_from_context, #host_2_url, #is_site?, #is_ssl?, #is_url?, #landing_location, #make_absolute, #normalize_url, #open_page, #redirect_location, #response_code, #url_2_host, #url_2_path, #url_2_port, #url_2_site, #urls_on_same_domain?

Methods included from Utils::DomainRoot

#get_domain_root, #get_domain_root_by_ccsld, #get_domain_root_by_cctld, #get_domain_root_by_tlds, #get_sub_domain, #is_domain_root?, #print_ccsld, #print_cctld, #print_gtld

Methods inherited from Wmap::HostTracker

#add, #bulk_add, #bulk_delete, #count, #delete, #dump_sub_domains, #file_add, #file_delete, #get_a_records, #get_root_domains, #host_aliases, #host_known?, #ip_known?, #local_host_2_ip, #local_ip_2_host, #print_host, #print_known_hosts, #refresh, #refresh_all, #save_known_hosts_to_file!, #search, #sub_domain_known?, #top_hostname

Constructor Details

#initialize(params = {}) ⇒ PrimaryHost

Initialize the instance variables



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# File 'lib/wmap/host_tracker/primary_host.rb', line 23

def initialize (params = {})
	@verbose=params.fetch(:verbose, false)
    @data_dir=params.fetch(:data_dir, File.dirname(__FILE__)+'/../../../data/')
	# Set default instance variables
	@file_hosts=@data_dir + 'prime_hosts'
	file=params.fetch(:hosts_file, @file_hosts)
	# Initialize the instance variables
    File.write(@file_hosts, "") unless File.exist?(@file_hosts)
	@known_hosts=load_known_hosts_from_file(file)
	@known_ips=Hash.new
	de_duplicate
end

Instance Attribute Details

#data_dir ⇒ Object

Returns the value of attribute data_dir.



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# File 'lib/wmap/host_tracker/primary_host.rb', line 19

def data_dir
  @data_dir
end

#hosts_file ⇒ Object

Returns the value of attribute hosts_file.



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# File 'lib/wmap/host_tracker/primary_host.rb', line 19

def hosts_file
  @hosts_file
end

#known_hosts ⇒ Object (readonly)

Returns the value of attribute known_hosts.



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# File 'lib/wmap/host_tracker/primary_host.rb', line 20

def known_hosts
  @known_hosts
end

#known_ips ⇒ Object (readonly)

Returns the value of attribute known_ips.



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# File 'lib/wmap/host_tracker/primary_host.rb', line 20

def known_ips
  @known_ips
end

#verbose ⇒ Object

Returns the value of attribute verbose.



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# File 'lib/wmap/host_tracker/primary_host.rb', line 19

def verbose
  @verbose
end

Instance Method Details

#de_duplicate ⇒ Object Also known as: deduplicate

Procedures to remove the redundant entries in the primary hosts data repository



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# File 'lib/wmap/host_tracker/primary_host.rb', line 103

def de_duplicate
	@known_hosts.keys.map do |key|
		ip=@known_hosts[key]
		if @known_ips.key?(ip)
			@known_hosts.delete(key)
		else
			@known_ips[ip]=true
		end
	end
end

#prime(host) ⇒ Object

Method to replace hostname with known primary hostname



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# File 'lib/wmap/host_tracker/primary_host.rb', line 116

def prime (host)
	begin
		raise "Unknown hostname format: #{host}" unless is_fqdn?(host)
		ip=local_host_2_ip(host)
		ip=host_2_ip(host) if ip.nil?
		if @known_ips.key?(ip)
			return @known_hosts[ip]
		end
		return host
	rescue Exception => ee
		puts "Exception on method #{__method__}: #{ee}" if @verbose
		return host
	end
end

#update_from_site_redirections! ⇒ Object

Procedures to identify primary host-name from the site store redirection URLs. The assumption is that on site redirection, it must be directed to the well known primary site.



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# File 'lib/wmap/host_tracker/primary_host.rb', line 76

def update_from_site_redirections!
	puts "Invoke internal procedures to update the primary host-name table from the site store."
	begin
		my_tracker=Wmap::SiteTracker.instance
      my_tracker.data_dir=@data_dir
      urls = my_tracker.get_redirection_urls
      my_tracker = nil 
		urls.map do |url|
			if is_url?(url)
				host=url_2_host(url)
				if is_fqdn?(host)
					ip=host_2_ip(host)
					# Add duplication check
					unless @known_hosts.key?(ip)
						self.add(host)
					end
				end
			end
		end
		self.save!
	rescue Exception => ee
		puts "Exception on method #{__method__}: #{ee}" if @verbose
		return nil
	end
end

#update_from_site_store! ⇒ Object Also known as: update!

Procedures to identify primary host-name from the site store SSL certificates. The assumption is that the CN used in the cert application must be primary hostname and used by the users.



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# File 'lib/wmap/host_tracker/primary_host.rb', line 37

def update_from_site_store!
	#begin
      puts "Invoke internal procedures to update the primary host-name table from the site store."
      # Step 1 - update the prime host table based on the SSL cert CN fields
		cns=Hash.new
		checker=Wmap::UrlChecker.new(:data_dir=>@data_dir)
      my_tracker = Wmap::SiteTracker.instance
      my_tracker.data_dir = @data_dir
		my_tracker.get_ssl_sites.map do |site|
			puts "Exam SSL enabled site entry #{site} ..."
			my_host=url_2_host(site)
			next if @known_hosts.key?(my_host) # add the logic to optimize the process
			puts "Pull SSL cert details on site: #{site}"
			cn=checker.get_cert_cn(site)
			unless cn.nil? or cns.key?(cn)
				cns[cn]=true
			end
		end
		cns.keys.map do |cn|
			if is_fqdn?(cn)
				next if @known_hosts.key?(cn)
				self.add(cn)
				puts "New entry added: #{cn}\t#{@known_hosts[cn]}"
			end
		end
		# Step 2 - Save the cache into the file
		self.save!
      checker=nil
      my_tracker=nil
	#rescue Exception => ee
	#	puts "Exception on method #{__method__}: #{ee}" if @verbose
    #  checker=nil
    #  my_tracker=nil
	#	return nil
	#end
end