module Seahorse::Util

def escape_header_list_string(s)
  s.include?('"') || s.include?(',') ? "\"#{s.gsub('"', '\"')}\"" : s
end

def host_label?(str)
  str =~ /^(?!-)[a-zA-Z0-9-]{1,63}(?<!-)$/
end

def uri_escape(string)
  CGI.escape(string.to_s.encode('UTF-8')).gsub('+', '%20').gsub('%7E', '~')
end

def uri_path_escape(path)
  path.gsub(/[^\/]+/) { |part| uri_escape(part) }
end