statstat.rb

#!/home/y/bin/ruby1.8

# constant
delim = [ 5 ].pack("c")
# how often do we output
period = 60

def initStats
	s = Hash.new
	s[:start] = Time.now
	s[:vers] = Hash.new
	s
end

File.open("/home/y/logs/yapache/access", "r") { |f|
        f.seek(0, IO::SEEK_END)
        puts "Moved to end of access log (offset is #{f.pos}) - will output every #{period}s"

	stats = initStats
         
	while true
		# is time up?
		if ((Time.now - stats[:start]) > period)
			op = stats[:vers].keys.collect { |k| "(#{k}: #{stats[:vers][k]})" }.join("\t")  
			cnt = 0 
			stats[:vers].each { |k,v| cnt += v }
			puts "#{cnt}  -- #{op}"
		        stats = initStats
		end

		cur = f.pos
		while true 
			f.seek(0, IO::SEEK_END)
			if f.pos != cur
				f.seek(cur, IO::SEEK_SET)
			        break
			end
			sleep 0.1
		end      
                         
		while s = f.gets
			hostid = s[0,8]
			time = s[8,8].to_i(16)
			size = s[24,8].to_i(16)
			url = s[32, s.index(delim, 32) - 32]
			next if url !~ /^\/usage/
			dat = Hash.new
			url.sub(/^.*\?/, '').split('&').each { |v|
				ar = v.split('=')
			        dat[ar[0]] = ar[1]
			}               
			next if !dat.has_key?('bp')
			v = dat['bp']
			stats[:vers][v] = 0 if !(stats[:vers].has_key?(v))
                        stats[:vers][v] += 1
                end
	end
}