295 lines
11 KiB
Python
295 lines
11 KiB
Python
from server.Files import read_file
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from server.game_board_stats import GameBoardStoreBuilder
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from server.GameBoard import GameBoard
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from snakes import SnakeBuilder
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from quart_common.web.logger import await_log
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from quart_common.web.logger import build_logger
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from server.metrics.MetricsManager import MetricsManager
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from server.metrics.ServerMetricsCollector import ServerMetricsCollector
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from server.storage.StorageLoader import StorageLoader
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from quart import Quart, request, jsonify
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import logging, json, os, re, time
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from typing import cast
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class Server:
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default_snake_config = {
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'apiversion': '1',
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'author': '',
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'color': '#888888',
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'head': 'default',
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'tail': 'default',
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'version': '1.0.0',
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}
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def __init__(self, data_path:str, snake_type:str, storage_type:str, debug:bool=False, check_tls_security:bool=False, game_state_backend:str='memory', game_state_redis_url:str='redis://localhost:6379/0', game_state_ttl_sec:int=900, game_state_local_cache:bool=True, metrics_backend:str='memory', metrics_redis_url:str='redis://localhost:6379/0', metrics_ttl_sec:int=None):
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self.debug = debug
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self.snake_type = snake_type
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self.storage_type = storage_type
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self.config_file = os.path.join(data_path, 'data', 'snake-config.json')
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self.data_path = data_path
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self.check_tls_security = check_tls_security
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self.store_game_state = False
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normalized_backend = (game_state_backend or 'memory').strip().lower()
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self.game_state_local_cache = (game_state_local_cache and normalized_backend != 'memory')
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self.game_state_store = GameBoardStoreBuilder.build(
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backend=game_state_backend,
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redis_url=game_state_redis_url,
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ttl_seconds=game_state_ttl_sec,
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)
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metrics_backend_normalized = (metrics_backend or 'memory').strip().lower()
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self.stale_game_timeout_sec = self._get_stale_game_timeout_sec()
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self.running_games:dict[str, GameBoard] = {}
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self.game_move_counts:dict[str, int] = {}
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self.game_last_seen_unix:dict[str, int] = {}
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self.metrics_collector = ServerMetricsCollector(
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metrics_manager=MetricsManager(
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backend=metrics_backend_normalized,
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redis_url=metrics_redis_url,
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ttl_seconds=metrics_ttl_sec,
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key_prefix=os.environ.get('METRICS_REDIS_KEY_PREFIX', 'snake:metrics:worker'),
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),
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game_state_local_cache=self.game_state_local_cache,
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metrics_backend=metrics_backend_normalized,
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game_state_backend=game_state_backend,
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stale_game_timeout_sec=self.stale_game_timeout_sec,
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game_last_seen_unix=self.game_last_seen_unix,
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game_move_counts=self.game_move_counts,
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)
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self.logger = build_logger('Battlesnake', debug_env_var='DEBUG_SERVER')
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self.snake_version = self._get_snake_version()
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self.app = Quart('Battlesnake')
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# info is called when you create your Battlesnake on play.battlesnake.com
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# and controls your Battlesnake's appearance
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# TIP: If you open your Battlesnake URL in a browser you should see this data
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@self.app.get('/')
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async def on_info():
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self.metrics_collector.record_http_request('info')
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snake_config = await self._read_json_config_or_create()
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await await_log(self.logger.info(f'INFO Snake: {snake_config}'))
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return snake_config
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# start is called when your Battlesnake begins a game
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@self.app.post('/start')
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async def on_start():
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self.metrics_collector.record_http_request('start')
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await self._prune_stale_games()
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game_state = await request.get_json()
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await self._create_game_board(game_state)
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await await_log(self.logger.info(f'GAME START: {game_state['game']}'))
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return 'ok'
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# move is called when your Battlesnake game is running game
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@self.app.post('/move')
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async def on_move():
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self.metrics_collector.record_http_request('move')
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game_state = await request.get_json()
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move_started = time.perf_counter()
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game_board = cast(GameBoard, await self._get_game_board(game_state))
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next_move = game_board.snake_neat_make_a_move()
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await self._persist_game_board(game_state['game']['id'], game_board)
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elapsed_ms = (time.perf_counter() - move_started) * 1000.0
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await self.metrics_collector.record_move(next_move, elapsed_ms)
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if self.debug:
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await await_log(self.logger.debug(f'TURN: {game_state['turn']:3}, MOVE: {next_move:5}'))
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return {'move': next_move}
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# end is called when your Battlesnake finishes a game
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@self.app.post('/end')
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async def on_end():
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self.metrics_collector.record_http_request('end')
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await self._prune_stale_games()
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game_state = await request.get_json()
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if self.store_game_state:
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game_board = cast(GameBoard, await self._get_game_board(game_state, end=True))
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if self.check_tls_security:
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await game_board.save(
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StorageLoader.build(self.storage_type),
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file_path=os.path.join(self.data_path, 'data'),
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database=os.getenv('EDGEDB_DATABASE', None),
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tls_security=None,
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)
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else:
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await game_board.save(
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StorageLoader.build(self.storage_type),
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file_path=os.path.join(self.data_path, 'data'),
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database=os.getenv('EDGEDB_DATABASE', None),
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)
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await await_log(self.logger.info(f'GAME ENDED: Winner is {[x['name'] for x in game_state['board']['snakes']]}'))
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await self._delete_game_board(game_state)
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await self.metrics_collector.record_game_end(game_state)
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return 'ok'
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@self.app.after_request
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async def identify_server(response):
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response.headers.set('server', 'battlesnake/gitea/snake-python')
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return response
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@self.app.after_serving
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async def shutdown_state_storage():
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await self.game_state_store.close()
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await self.metrics_collector.close()
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@self.app.get('/cleanup')
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async def cleanup():
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results = self._cleanup_database()
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return jsonify(data=json.loads(results), status=200)
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@self.app.get('/metrics')
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async def metrics():
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snapshot = await self.metrics_collector.build_snapshot(self.game_last_seen_unix, self.game_move_counts)
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return jsonify(snapshot)
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@self.app.get('/metrics/prometheus')
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async def metrics_prometheus():
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snapshot = await self.metrics_collector.build_snapshot(self.game_last_seen_unix, self.game_move_counts)
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return (
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self.metrics_collector.build_prometheus_metrics(snapshot),
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200,
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{'Content-Type': 'text/plain; version=0.0.4; charset=utf-8'},
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)
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async def run(self, host:str='0.0.0.0', port:int=8000, debug:bool=False):
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logging.getLogger('werkzeug').setLevel(logging.ERROR)
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await await_log(self.logger.info(f'Running Battlesnake at http://{host}:{port} with the {" ".join(re.findall("[A-Z][^A-Z]*", self.snake_type))}'))
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await self.app.run_task(host=host, port=port, debug=debug)
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async def _read_json_config_or_create(self) -> dict[str, str]:
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snake_config = cast(dict[str, str]|None, await read_file(self.config_file, json.load))
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if not snake_config:
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return await self._override_snake_config_with_environment_variables(self.default_snake_config)
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return await self._override_snake_config_with_environment_variables(snake_config)
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async def _override_snake_config_with_environment_variables(self, config:dict[str, str]) -> dict[str, str]:
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config['version'] = self.snake_version
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for key in ('author', 'color', 'head', 'tail'):
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value = os.environ.get(f'SNAKE_{key.upper()}')
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if value is not None:
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config[key] = value
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version_override = os.environ.get('SNAKE_VERSION')
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if version_override is not None:
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config['version'] = version_override
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return config
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def _get_snake_version(self) -> str:
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configured_version = SnakeBuilder.get_version(self.snake_type)
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if configured_version:
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return configured_version
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try:
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snake = SnakeBuilder.build(self.snake_type)
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except Exception:
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return self.default_snake_config['version']
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version = getattr(snake, 'version', None)
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if version is None:
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version = getattr(snake, 'VERSION', None)
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if not version:
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return self.default_snake_config['version']
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return str(version)
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def _get_stale_game_timeout_sec(self) -> int:
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value = os.getenv('SNAKE_STUCK_GAME_TIMEOUT_SEC', '180')
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try:
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return max(30, int(value))
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except ValueError:
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return 180
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async def _create_game_board(self, game_state:dict) -> GameBoard:
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game_id = game_state['game']['id']
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new_game_board = GameBoard(
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game_id=game_id,
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width=game_state['board']['width'],
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height=game_state['board']['height'],
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ruleset=game_state['game']['ruleset'],
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source=game_state['game']['source'],
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map=game_state['game']['map'],
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snake_class=SnakeBuilder.build(self.snake_type),
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)
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await new_game_board.start_game(game_state)
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if self.game_state_local_cache:
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self.running_games[game_id] = new_game_board
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await self.game_state_store.save(game_id, new_game_board)
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self.game_move_counts[game_id] = 0
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self.game_last_seen_unix[game_id] = int(time.time())
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await self.metrics_collector.record_game_started(len(self.game_last_seen_unix))
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return new_game_board
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async def _persist_game_board(self, game_id:str, game_board:GameBoard):
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if self.game_state_local_cache:
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self.running_games[game_id] = game_board
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await self.game_state_store.save(game_id, game_board)
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async def _delete_game_board(self, game_state:dict):
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game_id = game_state['game']['id']
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self.running_games.pop(game_id, None)
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self.game_move_counts.pop(game_id, None)
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self.game_last_seen_unix.pop(game_id, None)
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await self.game_state_store.delete(game_id)
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async def _get_game_board(self, game_state:dict, end:bool=False) -> GameBoard:
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game_id = game_state['game']['id']
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game_board: GameBoard
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if self.game_state_local_cache and game_id in self.running_games:
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game_board = self.running_games[game_id]
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else:
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persisted_board = await self.game_state_store.load(game_id)
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if persisted_board is not None:
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game_board = cast(GameBoard, persisted_board)
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if self.game_state_local_cache:
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self.running_games[game_id] = game_board
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else:
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game_board = await self._create_game_board(game_state)
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await self.metrics_collector.record_game_autocreated()
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if not end:
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self.game_move_counts[game_id] = self.game_move_counts.get(game_id, 0) + 1
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self.game_last_seen_unix[game_id] = int(time.time())
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game_board.read_game_data(game_state)
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if end:
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game_board.end_game(game_state)
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await self._persist_game_board(game_id, game_board)
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return game_board
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def enable_store_game_state(self):
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self.store_game_state = True
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def _cleanup_database(self):
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storage = StorageLoader.build(self.storage_type)()
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return storage.cleanup()
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async def _prune_stale_games(self):
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if not self.game_last_seen_unix:
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return
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now = int(time.time())
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stale_ids = [
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game_id
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for game_id, last_seen in self.game_last_seen_unix.items()
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if now - last_seen >= self.stale_game_timeout_sec
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]
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for game_id in stale_ids:
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self.running_games.pop(game_id, None)
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self.game_move_counts.pop(game_id, None)
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self.game_last_seen_unix.pop(game_id, None)
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await self.metrics_collector.record_stuck_removed()
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