DomainValidator

Adds a DomainValidator to ActiveModel, allowing for easy validation of FQDNs

Add this line to your application's Gemfile:

gem 'domain_validator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install domain_validator

Add a domain validation to your ActiveModel enabled class

class User < ActiveRecord::Base
  attr_accessible :domain
  validates :domain, :domain => true
end

DomainValidator can also perform a DNS check using ruby's built-in Resolv library

class User < ActiveRecord::Base
  attr_accessible :domain
  validates :domain, :domain => {:verify_dns => true}

  # Also supports a custom message when failing DNS check
  # validates :domain, :domain => {:verify_dns => {:message => "DNS check failed"}}
end

user = User.new :domain => 'mydomain.com'
user.valid? # => true

user.domain = 'invalid*characters.com'
user.valid? # => false

DomainValidator is tested against:

MRI 1.9.3, 2.0, 2.1.1, 2.1.2 JRuby 1.9
Rubinus 2.1.1

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Add some specs (so I don't accidentally break your functionality in future versions)
4. Commit your changes (git commit -am 'Add some feature')
5. Push to the branch (git push origin my-new-feature)
6. Create new Pull Request