discourse/lib/validators/url_validator.rb

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class UrlValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
if value.present?
valid =
begin
uri = URI.parse(value)
uri.is_a?(URI::HTTP) && !uri.host.nil? && uri.host.include?(".")
rescue URI::Error => e
if (e.message =~ /URI must be ascii only/)
value = URI.encode(value)
retry
end
nil
end
unless valid
record.errors[attribute] << (options[:message] || I18n.t('errors.messages.invalid'))
end
end
end
end