src/cgi-files/.svn/text-base/ttc-simple.rb.svn-base

   1 #!/usr/bin/ruby -w
   2 #
   3 # == Synopsis
   4 #
   5 # Play one move of a Trap the Cap game
   6 #
   7 # == Usage
   8 # ttc [ -b | --board-size SIZE ] [ -i | --input FILE ] [ -r | --robot ROBOT ] [ -h | --help ]
   9 #
  10 # == Author
  11 # Neil Smith
  12
  13 require 'libttc'
  14 require 'cgi'
  15 require 'open3'
  16 require 'timeout'
  17
  18 # Prevent dangerous operations
  19 $SAFE = 1
  20
  21 class InvalidRobotError < StandardError
  22 end
  23
  24 class NoInputFileError < StandardError
  25 end
  26
  27 class InvalidMoveInHistoryError < StandardError
  28 end
  29
  30 class GameWonInHistoryError < StandardError
  31 end
  32
  33
  34 # A table of the known game-playing robots
  35
  36 $ROBOT_NAME_TABLE = {
  37   'Always clockwise simple' => '/var/www/scripts.njae.me.uk/trap-the-cap/robots/1',
  38   'Clockwise cloud' => '/var/www/scripts.njae.me.uk/trap-the-cap/robots/2',
  39   'GA generation 1006' => '/var/www/scripts.njae.me.uk/trap-the-cap/robots/3'
  40 }
  41
  42 $ROBOT_CODE_TABLE = {
  43   '1'  => '/var/www/scripts.njae.me.uk/trap-the-cap/robots/1',
  44   '2'  => '/var/www/scripts.njae.me.uk/trap-the-cap/robots/2',
  45   '3'  => '/var/www/scripts.njae.me.uk/trap-the-cap/robots/3'
  46 }
  47
  48
  49 # How long the robot has to respond
  50 $ROBOT_TIMEOUT = 10
  51
  52
  53 def generate_output(cgi, returned_move, annotation)
  54   if returned_move.empty?
  55     return_part = ""
  56   else
  57     return_part = cgi.p { "Result is: " } + "\n" + cgi.h1 { returned_move } + "\n"
  58   end
  59
  60   if annotation.empty?
  61     annotation_part = ""
  62   else
  63     annotation_part = cgi.p { annotation }
  64   end
  65
  66   cgi.html {
  67     cgi.head { "\n" + cgi.title{"Move result"} } + "\n" +
  68     cgi.body { return_part + annotation_part }
  69     }
  70 end
  71
  72
  73 begin
  74
  75   cgi = CGI.new("html4")
  76
  77   chosen_robot = cgi['robot']
  78   if $ROBOT_NAME_TABLE.has_key? chosen_robot
  79     chosen_robot_dir = $ROBOT_NAME_TABLE[chosen_robot]
  80     chosen_robot_dir.untaint
  81   else
  82     raise InvalidRobotError, "#{chosen_robot} is not a valid robot code"
  83   end
  84
  85   begin
  86     game, moves, next_roll = Game.read_game(cgi['moves'].downcase.split("\n"))
  87     game.apply_moves! moves
  88   rescue InvalidMoveError => error
  89     raise(InvalidMoveInHistoryError, error.message)
  90   rescue GameWonNotice => error
  91     raise(GameWonInHistoryError, error.message)
  92   end
  93
  94   current_directory = Dir.pwd
  95   current_directory.untaint
  96   Dir.chdir chosen_robot_dir
  97
  98   returned_move = ""
  99   returned_error = ""
 100   robot_input = game.players.length.to_s + "\n"
 101   robot_input += (moves.collect {|m| m.to_s}).join("\n") + "\n" if not moves.empty?
 102   robot_input += next_roll.to_s
 103
 104 #  cgi.out { generate_output(cgi, "", "passing robot #{game.players.length.to_s + "#" + (moves.collect {|m| m.to_s}).join('!\n!') + "#" + next_roll.to_s}!") }
 105 #  cgi.out { generate_output(cgi, "", "passing robot #{robot_input}!") }
 106
 107
 108   Timeout.timeout($ROBOT_TIMEOUT + 1) do
 109     Open3.popen3('./runme') do |robot_in, robot_out, robot_err|
 110       robot_in << robot_input
 111       robot_in.close_write
 112       returned_move  = robot_out.gets
 113       returned_error = robot_err.gets
 114     end
 115   end
 116
 117   Dir.chdir current_directory
 118
 119 #  cgi.out { generate_output(cgi, "", "Returned move #{returned_move}; robot error was #{returned_error}!") }
 120
 121   raise(InvalidMoveError, "Robot returned error '#{returned_error}'") if returned_error != nil
 122   raise(InvalidMoveError, "Null move") if returned_move.nil? or returned_move.empty?
 123   next_move = returned_move.chomp.to_move(game)
 124   game.apply_move! next_move
 125
 126 #    cgi.out { generate_output(cgi, "", "Applied move #{returned_move}!") }
 127   cgi.out { generate_output(cgi, returned_move, "")  }
 128
 129 rescue InvalidMoveInHistoryError => error
 130   cgi.out { generate_output(cgi, "", "Invalid move in history: #{error}") }
 131 #  puts "Invalid move in history: #{error}"
 132 rescue GameWonInHistoryError => error
 133   cgi.out { generate_output(cgi, "", "Game already won in historic moves: #{error}") }
 134 #  puts "Game already won in historic moves: #{error}"
 135
 136 rescue InvalidMoveError => error
 137   cgi.out { generate_output(cgi, "", "Robot returned invalid move: #{error}") }
 138 #  puts "Robot returned invalid move: #{error}"
 139 rescue GameWonNotice => error
 140   cgi.out { generate_output(cgi, returned_move, "Game won: #{error}") }
 141 #  puts "Robot returned #{returned_move}"
 142 #  puts "Game won: #{error}"
 143
 144 rescue InvalidRobotError => error
 145   cgi.out { generate_output(cgi, "", "Invalid robot selection: #{error}") }
 146 #  puts "Invalid robot selection: #{error}"
 147 rescue Timeout::Error => error
 148   cgi.out { generate_output(cgi, "", "Robot timed out") }
 149 #  puts "Robot timeout: #{error}"
 150
 151 end