#!/usr/bin/env python3
-
-import socketserver
-import threading
-import queue
import sys
import os
-from parser import ArgError, Parser
-from server_.game import World, GameError
-from game_common import Commander
-
-
-# Avoid "Address already in use" errors.
-socketserver.TCPServer.allow_reuse_address = True
-
-
-class Server(socketserver.ThreadingTCPServer):
- """Bind together threaded IO handling server and message queue."""
-
- def __init__(self, queue, *args, **kwargs):
- super().__init__(*args, **kwargs)
- self.queue_out = queue
- self.daemon_threads = True # Else, server's threads have daemon=False.
-
-
-class IO_Handler(socketserver.BaseRequestHandler):
-
- def handle(self):
- """Move messages between network socket and main thread via queues.
-
- On start, sets up new queue, sends it via self.server.queue_out to
- main thread, and from then on receives messages to send back from the
- main thread via that new queue.
-
- At the same time, loops over socket's recv to get messages from the
- outside via self.server.queue_out into the main thread. Ends connection
- once a 'QUIT' message is received from socket, and then also kills its
- own queue.
-
- All messages to the main thread are tuples, with the first element a
- meta command ('ADD_QUEUE' for queue creation, 'KILL_QUEUE' for queue
- deletion, and 'COMMAND' for everything else), the second element a UUID
- that uniquely identifies the thread (so that the main thread knows whom
- to send replies back to), and optionally a third element for further
- instructions.
- """
- import plom_socket_io
-
- def caught_send(socket, message):
- """Send message by socket, catch broken socket connection error."""
- try:
- plom_socket_io.send(socket, message)
- except plom_socket_io.BrokenSocketConnection:
- pass
-
- def send_queue_messages(socket, queue_in, thread_alive):
- """Send messages via socket from queue_in while thread_alive[0]."""
- while thread_alive[0]:
- try:
- msg = queue_in.get(timeout=1)
- except queue.Empty:
- continue
- caught_send(socket, msg)
-
- import uuid
- print('CONNECTION FROM:', str(self.client_address))
- connection_id = uuid.uuid4()
- queue_in = queue.Queue()
- self.server.queue_out.put(('ADD_QUEUE', connection_id, queue_in))
- thread_alive = [True]
- t = threading.Thread(target=send_queue_messages,
- args=(self.request, queue_in, thread_alive))
- t.start()
- for message in plom_socket_io.recv(self.request):
- if message is None:
- caught_send(self.request, 'BAD MESSAGE')
- elif 'QUIT' == message:
- caught_send(self.request, 'BYE')
- break
- else:
- self.server.queue_out.put(('COMMAND', connection_id, message))
- self.server.queue_out.put(('KILL_QUEUE', connection_id))
- thread_alive[0] = False
- print('CONNECTION CLOSED FROM:', str(self.client_address))
- self.request.close()
-
-
-def fib(n):
- """Calculate n-th Fibonacci number. Very inefficiently."""
- if n in (1, 2):
- return 1
- else:
- return fib(n-1) + fib(n-2)
-
-
-class CommandHandler(Commander):
-
- def __init__(self):
- from multiprocessing import Pool
- self.queues_out = {}
- self.world = World()
- self.parser = Parser(self)
- # self.pool and self.pool_result are currently only needed by the FIB
- # command and the demo of a parallelized game loop in cmd_inc_p.
- self.pool = Pool()
- self.pool_result = None
-
- def handle_input(self, input_, connection_id=None, abort_on_error=False):
- """Process input_ to command grammar, call command handler if found."""
- from inspect import signature
- try:
- command = self.parser.parse(input_)
- if command is None:
- self.send_to(connection_id, 'UNHANDLED INPUT')
- else:
- if 'connection_id' in list(signature(command).parameters):
- command(connection_id=connection_id)
- else:
- command()
- except ArgError as e:
- self.send_to(connection_id, 'ARGUMENT ERROR: ' + str(e))
- if abort_on_error:
- exit(1)
- except GameError as e:
- self.send_to(connection_id, 'GAME ERROR: ' + str(e))
- if abort_on_error:
- exit(1)
-
- def send_to(self, connection_id, msg):
- """Send msg to client of connection_id; if no later, print instead."""
- if connection_id:
- self.queues_out[connection_id].put(msg)
- else:
- print(msg)
-
- def send_all(self, msg):
- """Send msg to all clients."""
- for connection_id in self.queues_out:
- self.send_to(connection_id, msg)
-
- def send_all_gamestate(self):
- """Send out game state data relevant to clients."""
-
- def stringify_yx(tuple_):
- """Transform tuple (y,x) into string 'Y:'+str(y)+',X:'+str(x)."""
- return 'Y:' + str(tuple_[0]) + ',X:' + str(tuple_[1])
-
- def quoted(string):
- """Quote & escape string so client interprets it as single token."""
- quoted = []
- quoted += ['"']
- for c in string:
- if c in {'"', '\\'}:
- quoted += ['\\']
- quoted += [c]
- quoted += ['"']
- return ''.join(quoted)
-
- self.send_all('NEW_TURN ' + str(self.world.turn))
- self.send_all('MAP_SIZE ' + stringify_yx(self.world.map_size))
- for y in range(self.world.map_size[0]):
- width = self.world.map_size[1]
- terrain_line = self.world.terrain_map[y * width:(y + 1) * width]
- self.send_all('TERRAIN_LINE %5s %s' % (y, quoted(terrain_line)))
- for thing in self.world.things:
- self.send_all('THING_TYPE %s %s' % (thing.id_, thing.type_))
- self.send_all('THING_POS %s %s' % (thing.id_,
- stringify_yx(thing.position)))
-
- def proceed(self):
- """Send turn finish signal, run game world, send new world data.
-
- First sends 'TURN_FINISHED' message, then runs game world
- until new player input is needed, then sends game state.
- """
- self.send_all('TURN_FINISHED ' + str(self.world.turn))
- self.world.proceed_to_next_player_turn()
- self.send_all_gamestate()
-
- def cmd_MOVE(self, direction):
- """Set player task to 'move' with direction arg, finish player turn."""
- if direction not in {'UP', 'DOWN', 'RIGHT', 'LEFT'}:
- raise ArgError('Move argument must be one of: '
- 'UP, DOWN, RIGHT, LEFT')
- self.world.get_player().set_task('move', direction=direction)
- self.proceed()
- cmd_MOVE.argtypes = 'string'
-
- def cmd_WAIT(self):
- """Set player task to 'wait', finish player turn."""
- self.world.get_player().set_task('wait')
- self.proceed()
-
- def cmd_GET_TURN(self, connection_id):
- """Send world.turn to caller."""
- self.send_to(connection_id, str(self.world.turn))
-
- def cmd_ECHO(self, msg, connection_id):
- """Send msg to caller."""
- self.send_to(connection_id, msg)
- cmd_ECHO.argtypes = 'string'
-
- def cmd_ALL(self, msg, connection_id):
- """Send msg to all clients."""
- self.send_all(msg)
- cmd_ALL.argtypes = 'string'
-
- def cmd_FIB(self, numbers, connection_id):
- """Reply with n-th Fibonacci numbers, n taken from tokens[1:].
-
- Numbers are calculated in parallel as far as possible, using fib().
- A 'CALCULATING …' message is sent to caller before the result.
- """
- self.send_to(connection_id, 'CALCULATING …')
- results = self.pool.map(fib, numbers)
- reply = ' '.join([str(r) for r in results])
- self.send_to(connection_id, reply)
- cmd_FIB.argtypes = 'seq:int:nonneg'
-
- def cmd_INC_P(self, connection_id):
- """Increment world.turn, send game turn data to everyone.
-
- To simulate game processing waiting times, a one second delay between
- TURN_FINISHED and NEW_TURN occurs; after NEW_TURN, some expensive
- calculations are started as pool processes that need to be finished
- until a further INC finishes the turn.
-
- This is just a demo structure for how the game loop could work when
- parallelized. One might imagine a two-step game turn, with a non-action
- step determining actor tasks (the AI determinations would take the
- place of the fib calculations here), and an action step wherein these
- tasks are performed (where now sleep(1) is).
- """
- from time import sleep
- if self.pool_result is not None:
- self.pool_result.wait()
- self.send_all('TURN_FINISHED ' + str(self.world.turn))
- sleep(1)
- self.world.turn += 1
- self.send_all_gamestate()
- self.pool_result = self.pool.map_async(fib, (35, 35))
-
-
-def io_loop(q, commander):
- """Handle commands coming through queue q, send results back.
-
- Commands from q are expected to be tuples, with the first element either
- 'ADD_QUEUE', 'COMMAND', or 'KILL_QUEUE', the second element a UUID, and
- an optional third element of arbitrary type. The UUID identifies a
- receiver for replies.
-
- An 'ADD_QUEUE' command should contain as third element a queue through
- which to send messages back to the sender of the command. A 'KILL_QUEUE'
- command removes the queue for that receiver from the list of queues through
- which to send replies.
-
- A 'COMMAND' command is specified in greater detail by a string that is the
- tuple's third element. The commander CommandHandler takes care of processing
- this and sending out replies.
- """
- while True:
- x = q.get()
- command_type = x[0]
- connection_id = x[1]
- content = None if len(x) == 2 else x[2]
- if command_type == 'ADD_QUEUE':
- commander.queues_out[connection_id] = content
- elif command_type == 'COMMAND':
- commander.handle_input(content, connection_id)
- elif command_type == 'KILL_QUEUE':
- del commander.queues_out[connection_id]
+import server_.game
if len(sys.argv) != 2:
print('wrong number of arguments, expected one (game file)')
exit(1)
game_file_name = sys.argv[1]
-commander = CommandHandler()
+game = server_.game.Game(game_file_name)
if os.path.exists(game_file_name):
if not os.path.isfile(game_file_name):
print('game file name does not refer to a valid game file')
lines = f.readlines()
for i in range(len(lines)):
line = lines[i]
- print("FILE INPUT LINE %s: %s" % (i, line), end='')
- commander.handle_input(line, abort_on_error=True)
+ print("FILE INPUT LINE %5s: %s" % (i, line), end='')
+ game.io.handle_input(line, store=False)
else:
- commander.handle_input('MAP_SIZE Y:5,X:5')
- commander.handle_input('TERRAIN_LINE 0 "xxxxx"')
- commander.handle_input('TERRAIN_LINE 1 "x...x"')
- commander.handle_input('TERRAIN_LINE 2 "x.X.x"')
- commander.handle_input('TERRAIN_LINE 3 "x...x"')
- commander.handle_input('TERRAIN_LINE 4 "xxxxx"')
- commander.handle_input('THING_TYPE 0 human')
- commander.handle_input('THING_POS 0 Y:3,X:3')
- commander.handle_input('THING_TYPE 1 monster')
- commander.handle_input('THING_POS 1 Y:1,X:1')
-q = queue.Queue()
-c = threading.Thread(target=io_loop, daemon=True, args=(q, commander))
-c.start()
-server = Server(q, ('localhost', 5000), IO_Handler)
-try:
- server.serve_forever()
-except KeyboardInterrupt:
- pass
-finally:
- print('Killing server')
- server.server_close()
+ game.io.handle_input('GEN_WORLD Hex Y:16,X:16 bar')
+game.io.run_loop_with_server()
projects / plomrogue2-experiments / blobdiff