litmus-app-ip-regex-spec.rb

# IP Ranges of Litmus App servers
# http://litmusapp.com
#
# 67.202.0.0/18
# 72.44.32.0/19
# 75.101.128.0/17
# 174.129.0.0/16
# 184.73.0.0/16
# 184.72.0.0/18
# 204.236.192.0/18
# 204.236.128.0/18
# 204.9.221.14/32
# 209.20.0.0/16
# 216.182.224.0/20


class LitmusAppIp

  # FOR GA 255 char limit!
  # 
  # Caveats, due to tactics to shorten the regex for Google Analytics the
  # following IP addresses should not be matched by this regex but will be.
  # (I deemed it okay as they are most likely within the same hosting company)
  #
  # 67.202.0.19
  # 184.73.0.17
  # 184.73.0.18
  # 184.73.0.19
  # 184.72.0.19
  # 204.236.192.19
  # 204.236.128.19
  # 
  # Perhaps it will work to write an include rule that will include them back in.
  # ... though that kindof makes shortening it a bit of yak shaving.
  #
  SHORTENED_REGEX = /^(67\.202\.0\.(\d|1\d))|(72\.44\.32\.(\d|1\d))|(75\.101\.128\.(\d|1[0-7]))|(174\.129\.0\.(\d|1[0-6]))|(184\.(72|73)\.0\.(\d|1[0-8]))|(204\.236\.(192|128)\.(\d|1\d))|(204\.9\.221\.(1[4-9]|2\d|3[0-2]))|(209\.20\.0\.(\d|1[0-6]))|(216\.182\.224\.(\d|1\d|20))$/

  # This is a perfect regex rule with no caveats. 
  # Thought it will need split up as two google analytics exclude filters
  #
  LONG_REGEX = /^(216\.182\.224\.([0-9]|1[0-9]|20))|(72\.44\.32\.([0-9]|1[0-9]))|(67\.202\.0\.([0-9]|1[0-8]))|(75\.101\.128\.([0-9]|1[0-7]))|(174\.129\.0\.([0-9]|1[0-6]))|(204\.236\.192\.([0-9]|1[0-8]))|(184\.73\.0\.([0-9]|1[0-6]))|(204\.236\.128\.([0-9]|1[0-8]))|(184\.72\.0\.([0-9]|1[0-8]))|(209\.20\.0\.([0-9]|1[0-6]))|(204\.9\.221\.(1[4-9]|2[0-9]|3[0-2]))$/

  def self.match(address)
    address =~ SHORTENED_REGEX
  end

end

describe LitmusAppIp do

  before(:all) do
    @valid_ips = [ "216.182.224.0", "216.182.224.10", "216.182.224.20",
      "72.44.32.0", "67.202.0.0",
      "75.101.128.0", "174.129.0.0", "204.236.192.18", "184.73.0.1", 
      "204.236.128.5", "184.72.0.2", "209.20.0.3", "204.9.221.14"
    ]
    @invalid_ips = [ "216.182.225.0", "72.44.52.0", "67.202.1.0",
      "76.101.128.0", "194.129.0.0", "202.236.192.18", "183.73.0.1", 
      "234.236.128.5", "174.72.0.2", "201.20.0.3", "204.9.224.14", "216.182.224.21", "216.182.224.215"
    ]
  end
  
  it "should match litmus IP addresses" do
    @valid_ips.each do |address|
      LitmusAppIp.match(address).should == 0
    end
  end

  it "should not match non litmus IP addresses" do
    @invalid_ips.each do |address|
      LitmusAppIp.match(address).should == nil
    end
  end

end