diff options
Diffstat (limited to 'puppet/modules/stdlib/lib/puppet/parser/functions/is_domain_name.rb')
-rw-r--r-- | puppet/modules/stdlib/lib/puppet/parser/functions/is_domain_name.rb | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/puppet/modules/stdlib/lib/puppet/parser/functions/is_domain_name.rb b/puppet/modules/stdlib/lib/puppet/parser/functions/is_domain_name.rb new file mode 100644 index 00000000..b3fee965 --- /dev/null +++ b/puppet/modules/stdlib/lib/puppet/parser/functions/is_domain_name.rb @@ -0,0 +1,50 @@ +# +# is_domain_name.rb +# + +module Puppet::Parser::Functions + newfunction(:is_domain_name, :type => :rvalue, :doc => <<-EOS +Returns true if the string passed to this function is a syntactically correct domain name. + EOS + ) do |arguments| + + if (arguments.size != 1) then + raise(Puppet::ParseError, "is_domain_name(): Wrong number of arguments "+ + "given #{arguments.size} for 1") + end + + domain = arguments[0] + + # Limits (rfc1035, 3.1) + domain_max_length=255 + label_min_length=1 + label_max_length=63 + + # Only allow string types + return false unless domain.is_a?(String) + + # Allow ".", it is the top level domain + return true if domain == '.' + + # Remove the final dot, if present. + domain.chomp!('.') + + # Check the whole domain + return false if domain.empty? + return false if domain.length > domain_max_length + + # Check each label in the domain + labels = domain.split('.') + vlabels = labels.each do |label| + break if label.length < label_min_length + break if label.length > label_max_length + break if label[-1..-1] == '-' + break if label[0..0] == '-' + break unless /^[a-z\d-]+$/i.match(label) + end + return vlabels == labels + + end +end + +# vim: set ts=2 sw=2 et : |