/app/helpers/katello/katello_url_helper.rb

#
# Copyright 2014 Red Hat, Inc.
#
# This software is licensed to you under the GNU General Public
# License as published by the Free Software Foundation; either version
# 2 of the License (GPLv2) or (at your option) any later version.
# There is NO WARRANTY for this software, express or implied,
# including the implied warranties of MERCHANTABILITY,
# NON-INFRINGEMENT, or FITNESS FOR A PARTICULAR PURPOSE. You should
# have received a copy of GPLv2 along with this software; if not, see
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.

module Katello
module KatelloUrlHelper
  include Rails.application.routes.url_helpers

  unless defined? CONSTANTS_DEFINED
    PORT = /(([:]\d{1,5})?)/
    PROTOCOLS = %r{(https?|ftp)://}ix
    FILEPREFIX = %r{(^file://)|^/}ix # is this a file based url
    # validation of hostname according to RFC952 and RFC1123
    DOMAIN = /(?:(?:(?:(?:[a-z0-9][-a-z0-9]{0,61})?[a-z0-9])[.])*(?:[a-z][-a-z0-9]{0,61}[a-z0-9]|[a-z])[.]?)/
    IPV4 = /(?:(?: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]?)/
    #TODO: ipv6 support
    #IPV6 = /(?:[0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4}/
    URLREG = /^#{PROTOCOLS}((localhost)|#{DOMAIN}|#{IPV4})#{PORT}(\/.*)?$/ix
    FILEREG = /#{FILEPREFIX}([\w-]*\/?)*/ix # match file based urls
    CONSTANTS_DEFINED = true
  end

  def kipv4?(url)
    !!IPV4.match(url)
  end

  def kprotocol?(url)
    regex = /^#{PROTOCOLS}/
    !!regex.match(url)
  end

  def kurl_valid?(url)
    !!(file_prefix?(url) ? FILEREG.match(url) : URLREG.match(url))
  end

  def file_prefix?(url)
    !!FILEPREFIX.match(url)
  end

end
end