access_log_grapher

#!/usr/bin/env ruby

require 'rubygems'
require 'progressbar'
require 'gruff'

module Apache
  module Log
    class Entry
      attr_accessor :method
      attr_accessor :url
      attr_accessor :status
      attr_accessor :size
      attr_accessor :time_sec
      attr_accessor :time_usec
      attr_accessor :time_passenger
  
      def initialize(params)
        params.each do |k,v|
          self.send("#{k}=", v)
        end
      end      
    end

    class List
      attr_reader :items
      
      def initialize
        @items = []
      end
      
      def read(filename)
        lines = `wc -l #{filename}`.to_i
        pbar = ProgressBar.new("Analysing", lines)
        
        File.open(filename, 'r').each do |line|
          if line =~ /"(GET|POST) ([^ ]+).*?" (\d+) (\d+) .*? (\d+)\/(\d+) "(\d+)"/
            entry = Entry.new(:method => $1, :url => $2, :status => $3, :size => $4, :time_sec => $5, :time_usec => $6, :time_passenger => $7)
            @items << entry
          end
          pbar.inc
        end
        pbar.finish
      end
      
      def to_url_size_hash
        hash = {}
        @items.each do |item|
          if hash[item.url].nil? || hash[item.url].to_i < item.size.to_i
            hash[item.url] = item.size.to_i
          end
        end
        hash
      end
      
      def top_size(number)
        items = to_url_size_hash
        items.sort {|a,b| a[1] <=> b[1]}.reverse[0..number]
      end
      
    end
  end
end

#--------------------------------------------------------------------------------

filename = ARGV[0]
list = Apache::Log::List.new
list.read(filename)

g = Gruff::Line.new(800)
g.title = "Response times"
g.data("Time/ms", list.items.collect {|e| (e.time_usec.to_i/1000).to_i } )
#g.labels = {0 => '2003', 2 => '2004', 4 => '2005'}
g.write('response_times.png')
g.hide_lines = true
g.write('response_times_no_lines.png')

`open *.png`