har_script.rb

require 'json'
require "net/http"
require "uri"

response = Net::HTTP.get_response(URI.parse(ARGV[0]))
data_hash = JSON.parse(response.body)

request_times = {"fastest" => {}, "slowest" => {}}
entries = data_hash['log']['entries']

# get the fastest & slowest times
for entry in entries
    e_time = entry['time']
    e_file = entry['request']['url']
	
    if !request_times['fastest'].has_key? "time"
        request_times['fastest']['time'] = e_time
		request_times['fastest']['file'] = e_file
		
		# if the fastest isn't set, the slowest shouldn't be either	
		request_times['slowest']['time'] = e_time
		request_times['slowest']['file'] = e_file
		next
    end
	
	if request_times['fastest']['time'] > e_time
		request_times['fastest']['time'] = e_time
		request_times['fastest']['file'] = e_file
		next
	end
	
	if request_times['slowest']['time'] < e_time
		request_times['slowest']['time'] = e_time
		request_times['slowest']['file'] = e_file
	end
end

puts "Fastest: #{URI.unescape(request_times['fastest']['file'])} #{request_times['fastest']['time']} seconds"
puts "Slowest: #{URI.unescape(request_times['slowest']['file'])} #{request_times['slowest']['time']} seconds"