ActiveModel URL Validator

url_validator.rb

class UrlValidator < ActiveModel::EachValidator

  def validate_each(record, attribute, value)
    valid = begin
      URI.parse(value).kind_of?(URI::HTTP)
    rescue URI::InvalidURIError
      false
    end
    unless valid
      record.errors[attribute] << (options[:message] || "is an invalid URL")
    end
  end

end

One issue I am having is that blank urls not validated by presence are still resulting in an error. I'll fork this and see if I can fix it.

@keilmillerjr just add :allow_blank => true

Thanks, that's what I was looking for.

https? unicode? I forked, and cleaned-up a bit, but it's untested - just for discussion sake: https://gist.github.com/timocratic/5113293

.kind_of?(URI::HTTP) handles HTTPS.

Benjamin Fleischer posted a modified version based on what @timocratic published. He also included an updated version of the spec. An updated fork of this Gist can be found here.

see https://gist.github.com/adamico/2a781d6a4fc2ff577e7f for a Rails 4 with I18n messages and updated and simplified specs