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stevenberg/quick_and_dirty_url_validation.rb

Created December 14, 2012 14:09
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  1. stevenberg revised this gist Dec 14, 2012. No changes.
  2. stevenberg revised this gist Dec 14, 2012. No changes.
  3. stevenberg created this gist Dec 14, 2012.
    23 changes: 23 additions & 0 deletions quick_and_dirty_url_validation.rb
    View file
    Original file line number Diff line number Diff line change
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    # 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