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stevenberg/quick_and_dirty_url_validation.rb

Created December 14, 2012 14:09
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Quick and Dirty URL Validation in Rails
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quick_and_dirty_url_validation.rb
# http://almosteffortless.com/2009/02/09/quick-and-dirty-url-validation/
class Link < ActiveRecord::Base
attr_accessible :url
validate :validate_url
private
def validate_url
unless %w(200 301 302).include?(self.class.status_code(url))
errors.add :url
end
end
def self.status_code(url)
regexp = url.match(%r{https?://([^/]+)(.*)})
path = regexp[2].blank? ? '/' : regexp[2]
Net::HTTP.start(regexp[1]) { |http| http.head(path).code }
rescue
nil
end
end
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