#
# Ridiculously basic script to search license plate combinations.
# I removed the user-agent and cookie headers that I copied from
# chrome, but if you need them just add your own user-agent and
# cookie from the carfax site back in.
#
# You'll need to change the possibilites, plate pattern and regex
# to suite your needs. I wrote this in about 5 minutes so it's
# basic, crude and pretty unmaintainable, but gives you a sense
# of what can be done.

require 'htmlentities'
require 'cgi'

letters = ('A'..'Z').to_a
possibilities = letters.product letters
hits = []

possibilities.each do |combos|
  combos.each do |combo|
    plate = "XXX#{combo}XXX" # Change to suite your needs!
    response = `curl -s 'http://www.carfax.com/processQuickVin.cfx?partnerCode=CFX&partnerSiteLocation=Y&checkReport=DEC&checkReportVersion=30&fid=&test=&cctest=&affiliateId=&subId=&bannerName=&partnerCode=CFX&partnerSiteLocation=Y&checkReport=DEC&checkReportVersion=30&fid=&test=&cctest=&affiliateId=&subId=&bannerName=&licensePlateNumber=#{plate}&licensePlateState=CA' -H 'Accept-Encoding: gzip, deflate, sdch' -H 'Accept-Language: en-US,en;q=0.8' -H 'Referer: http://www.carfax.com/'`

    if response =~ /year=(\d{4})&make=(\w+)&model=(.+?)&recordCheckType/
      hits << { plate: plate, year: $1, make: $2, model: $3 }
      puts "Found #{hits.last[:plate]} #{hits.last[:year]} #{hits.last[:make]} #{CGI.unescape(HTMLEntities.new.decode hits.last[:model])}"
    end
  end
end

puts "Found #{hits.count} plates..."
puts hits.inspect