Mini Url checker tool

stress_test.rb

#!/usr/bin/env ruby
# encoding: utf-8

# Uğur Özyılmazel, ugur@ozyilmazel.com @vigobronx, @ugurozyilmazel

require 'optparse'
require 'open-uri'
require 'uri'

$VERSION = 1.1

# terminal colors...
$RESET             = "\e[0m"      # reset
$BLACK             = "\e[0;30m"
$RED               = "\e[0;31m"
$GREEN             = "\e[0;32m"
$BROWN             = "\e[0;33m"
$BLUE              = "\e[0;34m"
$PURPLE            = "\e[0;35m"
$CYAN              = "\e[0;36m"
$LIGHT_GREY        = "\e[0;37m"


if $0 == __FILE__
  options = {}
  # defaults
  options[:loop_count] = 100
  options[:interval] = 5
  
  opt_parser = OptionParser.new do |opt|
    opt.banner = "Usage: #{$0} [URL] [OPTIONS]"
    opt.separator  ""
    opt.separator  "URL: Must be a valid url and must started with http://"
    opt.separator  ""
    opt.separator  "Options"
    opt.separator  "---------------------------------------------------------"
    opt.separator  ""
    
    opt.on("-V","Version Information") do
      puts "#{$VERSION}"
      exit
    end

    opt.on("-l","--loop LOOP_COUNT","Iteration amount. Default is #{options[:loop_count]} times.") do |loop_count|
      options[:loop_count] = loop_count
    end
    
    opt.on("-i","--interval SECONDS","Call url in every XX Seconds. Default is #{options[:interval]} seconds.") do |interval|
      options[:interval] = interval
    end
    
    # opt.on("-u","--url URL","Website address") do |url|
    #   options[:url] = url
    # end

    opt.on("-n","--no-caching","Enable anti-caching. Add timestap at the end of url (http://example.com?1328790164)") do
      options[:no_cache] = true
    end
    
    opt.on("-v","--verbose","Verbose mode") do
      options[:verbose] = true
    end

    opt.on("-h","--help","help") do
      puts opt_parser
      puts ""
      exit
    end
  end
  
  opt_parser.parse!
  
  url = ARGV[0]
  
  if options[:no_cache] then url = "%s?%s" % [url, Time.now.to_i] end
  
  loop_count = options[:loop_count].to_i
  interval = options[:interval].to_i
  total_seconds = []
  error_count = 0
  unless (url =~ URI::regexp).nil?
    loop_count.times{ |i|
      time_start = Time.now
      print "Fetching..."
      
      begin
        fetched_url = open(url)
      rescue SocketError
        puts "#{$RED}Site is not responding#{$RESET}..."
        error_count += 1
      end
      time_end = Time.now
      time_diff = time_end - time_start
      total_seconds.push(time_diff)
      
      if options[:verbose] then print "Started at #{$CYAN}#{time_start.strftime('%H:%M:%S')}#{$RESET}, " end
      
      print "#{i+1} completed. (#{$PURPLE}#{time_diff}#{$RESET} seconds)."
      
      if options[:verbose] then print " Endend at #{$CYAN}#{time_end.strftime('%H:%M:%S')}#{$RESET}." end
      print "\n"
      
      if options[:verbose]
        html = fetched_url.read.split("\n")
        html.each_with_index { |text, index| html[index] = text.strip }
        html.reject! { |item| item.empty? } # clear empty lines...
        puts "Random line from grabbed html:"
        puts "\t#{$BLUE}#{html[rand(html.size)]}#{$RESET}\n"
      end
      sleep(interval)
    }
    
    total_time = 0
    total_seconds.each{ |t| total_time+= t }
    puts ""
    puts "#{$BROWN}#{url}#{$RESET} has been called #{$PURPLE}#{loop_count}#{$RESET} times in #{$PURPLE}#{interval}#{$RESET} seconds interval."
    puts "Avarage response is #{$RED}#{total_time/(loop_count*1.0)}#{$RESET} seconds..."
    if error_count > 0 then puts "Site did not responded #{$RED}#{error_count}#{$RESET} time(s)" end
    puts ""
  else
    puts "Sorry, please enter valid url... Maybe http:// is missing"
  end
end