Top Level Namespace

Defined Under Namespace

Modules: MON, Monsternet Classes: Monster

Constant Summary collapse

ATTR_FILE = 
'attr.json'
UUID_FILE = 
'uuid.txt'
PEERS_FILE = 
'peers.txt'
PAGES_DIR = 
"#{Dir.pwd}/pages"
TOK = 
File.read(UUID_FILE)
ID = 
ENV['ID'] || TOK
PORT = 
ENV['PORT'] || 9090
NICK = 
ENV['NICK'] || "M-#{ID}"
EV = 
Hash.new { |h,k| h[k] = lambda() { |*a| puts %[EV> #{k} #{a}] } }

Instance Method Summary collapse

Instance Method Details

#announce_to_peers ⇒ Object 



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# File 'lib/monsternet.rb', line 197

def announce_to_peers
  peers("HI #{ID} #{NICK} #{my_info}")
end

#handle_client(socket) ⇒ Object

Handle an incoming client connection



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# File 'lib/monsternet.rb', line 55

def handle_client(socket)
  request = CGI.unescape(socket.gets).gsub(/\n+/, "\n")
  if request.nil?
    send_response(socket, 400)
    return
  end

  if request.start_with?("HI")
    # Peer announcing itself: /announce IP:PORT
    _, peer_id, peer_nick, peer_info = request.split(" ")
    
    if peer_info
      if !MON.peer.has_key?(peer_id)
    EV[:peer].call(peer_id, peer_nick, peer_info)
    File.open(PEERS_FILE, 'a') { |f| f.puts(peer_info) }
      end
      MON.peer[peer_id] = peer_info
      MON.nicks[peer_nick] = peer_id
      MON.nick[peer_id] = peer_nick
      MON.times[peer_id] = Time.now.utc.to_i
      MON.lives[peer_id] = true
      #puts "[HI] #{peer_nick}"
      EV[:hi].call(peer_id)
      send_message(peer_info, "SUP #{ID} #{NICK} #{my_info}")
      send_response(socket, 200)
      return nil
    else
      send_response(socket, 400, "Missing peer info")
      return nil
    end

  elsif request.start_with?("SUP")
    _, peer_id, peer_nick, peer_info = request.split(" ")
    if peer_info
      if !MON.peer.has_key? peer_id
        EV[:new].call(peer_info, peer_id, peer_nick)
  File.open(PEERS_FILE, 'a') { |f| f.puts(peer_info) }
      end
      MON.peer[peer_id] = peer_info
      MON.nicks[peer_nick] = peer_id
      MON.nick[peer_id] = peer_nick
      MON.seens[peer_id] = Time.now.utc.to_i
      #puts "[HI] #{peer_nick}"
      EV[:sup].call(peer_id)
      send_response(socket, 200, "SUP #{ID} #{NICK} #{my_info}")
      return "[HI] #{peer_nick}"
    else
      send_response(socket, 400, "Missing peer info")
      return nil
    end
    
    
  elsif request.start_with?("BYE")
    # Peer announcing itself: /announce IP:PORT                                                                                                                                                                   
    peer_nick = request.split(" ")[1]
    if peer_nick
      MON.lefts[MON.nicks[peer_nick]] = Time.now.utc.to_i
      MON.lives[peer_id] = false
      #puts "[BYE] #{peer_nick}"
      EV[:bye].call(peer_id)
      send_response(socket, 200, "Bye #{peer_info}")
      return "[BYE] #{peer_nick}"
    else
      send_response(socket, 400, "Missing peer info")
      return nil
    end    
    
  elsif request.start_with?("YO")
    # /message NAME: Hello world
    parts = request.split(" ")
    parts.shift
    #puts parts.join(" ")
    EV[:yo].call(peer_id, parts.join(" "))
    send_response(socket, 200, Time.now.utc.to_s)
  return nil
    
  elsif request.start_with?("GET")
    a = request.split(" ")
    a.shift
    @peer = a.shift
    f = a.shift
    b = a.join(" ")
    @params = {}
    b.split("&").each { |e| ee = e.split("="); @params[ee[0]] = ee[1] }
#    puts %[<<< #{f}: #{@params}]
    file_path = File.join(PAGES_DIR, f)
    if File.exist?(file_path)
      EV[:get].call(@peer, file_path, @params)
      send_response(socket, 200, %[#{ERB.new(File.read(file_path)).result(binding)}])
      return nil
    else
      send_response(socket, 404, "No such page")
      return nil
    end
  end
rescue => e
  puts "[!!!] Error: #{e}"
  send_response(socket, 500)
ensure
  socket.close
end

#leave_to_peers ⇒ Object 



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# File 'lib/monsternet.rb', line 194

def leave_to_peers
  peers("BYE #{NICK}")
end

#my_info ⇒ Object 



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# File 'lib/monsternet.rb', line 169

def my_info
  %[#{Socket.gethostname}:#{PORT}]
end

#peers(x) ⇒ Object 



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# File 'lib/monsternet.rb', line 190

def peers x
  $known_peers.to_a.each { |e| send_message(e, x) }
end

#send_message(peer, message) ⇒ Object 



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# File 'lib/monsternet.rb', line 173

def send_message(peer, message)
  host, port = peer.to_s.split(":")
  begin
    socket = TCPSocket.new(host, port.to_i)
    socket.puts CGI.escape(message)
    #puts "[send] #{peer}: #{message}"
    a = []
    r = CGI.unescape(socket.gets).gsub(/\n+/,"\n").split("\n")
    r.shift
    #puts %[[res] #{r.join("\n")}]
    socket.close
    return r.join("\n")
  rescue => e
    puts "[err] #{peer}: #{e}"
  end
end

#send_response(socket, status, body = "") ⇒ Object

Simple Spartan response helper



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# File 'lib/monsternet.rb', line 50

def send_response(socket, status, body = "")
  socket.puts CGI.escape(%[#{status}\n#{body}])
end

#start_server ⇒ Object

Start TCP server thread



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# File 'lib/monsternet.rb', line 158

def start_server
  server = TCPServer.new('0.0.0.0', PORT)
  puts "[server] #{PORT}"
  puts "[nick] #{NICK}"

  loop do
    client = server.accept
    Thread.new { handle_client(client) }
  end
end