Partially revert "Add IP check against DNSBLs at account sign-up"rs-remove-ip-blocking

This partially reverts 6a5cd3ca - we keep the migration and add a new
migration that reverts it in order to keep migration history intact.

2 files changed, 0 insertions, 139 deletions

diff --git a/lib/dnsxl_check.rb b/lib/dnsxl_check.rb
deleted file mode 100644
index 1e506b2d9cb..00000000000
--- a/lib/dnsxl_check.rb
+++ /dev/null
@@ -1,105 +0,0 @@
-require 'resolv'
-
-class DNSXLCheck
-
-  class Resolver
-    def self.search(query)
-      begin
-        Resolv.getaddress(query)
-        true
-      rescue Resolv::ResolvError
-        false
-      end
-    end
-  end
-
-  IP_REGEXP = /\A(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\z/
-  DEFAULT_THRESHOLD = 0.33
-
-  def self.create_from_list(list)
-    dnsxl_check = DNSXLCheck.new
-
-    list.each do |entry|
-      dnsxl_check.add_list(entry.domain, entry.weight)
-    end
-
-    dnsxl_check
-  end
-
-  def test(ip)
-    if use_threshold?
-      test_with_threshold(ip)
-    else
-      test_strict(ip)
-    end
-  end
-
-  def test_with_threshold(ip)
-    return false if lists.empty?
-
-    search(ip)
-    final_score >= threshold
-  end
-
-  def test_strict(ip)
-    return false if lists.empty?
-
-    search(ip)
-    @score > 0
-  end
-
-  def use_threshold=(value)
-    @use_threshold = value == true
-  end
-
-  def use_threshold?
-    @use_threshold &&= true
-  end
-
-  def threshold=(threshold)
-    raise ArgumentError, "'threshold' value must be grather than 0 and less than or equal to 1" unless threshold > 0 && threshold <= 1
-    @threshold = threshold
-  end
-
-  def threshold
-    @threshold ||= DEFAULT_THRESHOLD
-  end
-
-  def add_list(domain, weight)
-    @lists ||= []
-    @lists << { domain: domain, weight: weight }
-  end
-
-  def lists
-    @lists ||= []
-  end
-
-  private
-
-  def search(ip)
-    raise ArgumentError, "'ip' value must be in #{IP_REGEXP} format" unless ip.match(IP_REGEXP)
-
-    @score = 0
-
-    reversed = reverse_ip(ip)
-    search_in_rbls(reversed)
-  end
-
-  def reverse_ip(ip)
-    ip.split('.').reverse.join('.')
-  end
-
-  def search_in_rbls(reversed_ip)
-    lists.each do |rbl|
-      query = "#{reversed_ip}.#{rbl[:domain]}"
-      @score += rbl[:weight] if Resolver.search(query)
-    end
-  end
-
-  def final_score
-    weights = lists.map{ |rbl| rbl[:weight] }.reduce(:+).to_i
-    return 0 if weights == 0
-
-    (@score.to_f / weights.to_f).round(2)
-  end
-end
diff --git a/lib/gitlab/ip_check.rb b/lib/gitlab/ip_check.rb
deleted file mode 100644
index f2e9b50d225..00000000000
--- a/lib/gitlab/ip_check.rb
+++ /dev/null
@@ -1,34 +0,0 @@
-module Gitlab
-  class IpCheck
-
-    def initialize(ip)
-      @ip = ip
-
-      application_settings = ApplicationSetting.current
-      @ip_blocking_enabled =  application_settings.ip_blocking_enabled
-      @dnsbl_servers_list = application_settings.dnsbl_servers_list
-    end
-
-    def spam?
-      @ip_blocking_enabled && blacklisted?
-    end
-
-    private
-
-    def blacklisted?
-      on_dns_blacklist?
-    end
-
-    def on_dns_blacklist?
-      dnsbl_check = DNSXLCheck.new
-      prepare_dnsbl_list(dnsbl_check)
-      dnsbl_check.test(@ip)
-    end
-
-    def prepare_dnsbl_list(dnsbl_check)
-      @dnsbl_servers_list.split(',').map(&:strip).reject(&:empty?).each do |domain|
-        dnsbl_check.add_list(domain, 1)
-      end
-    end
-  end
-end