gistfile1.rb

  # untained_csv_each(File.open('my.csv'),'Date') do |row|
  #   # do something with row
  # end
  
  def untainted_csv_each(file,line_match,&block)
    tmp_file       = File.open(file.path+"-tmp","w+") 
    garbage_passed = false

    file.each do |line|
      garbage_passed = true if line =~ /^"(.*)#{line_match}"/ && !garbage_passed
      tmp_file.write(line) if garbage_passed
    end

    tmp_file.close

    begin
      CSV.foreach(tmp_file.path,{ :headers => true }).each(&block)
    rescue CSV::MalformedCSVError
      # ignore
    end
  end