mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
141 lines
5.4 KiB
Python
141 lines
5.4 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main PiKVM daemon. #
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# #
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# Copyright (C) 2018-2022 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import os
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import asyncio
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from typing import List
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from typing import Dict
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from aiohttp.web import Request
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from aiohttp.web import WebSocketResponse
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from ...logging import get_logger
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from ... import tools
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from ... import aiotools
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from ... import aiohelpers
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from ...htserver import exposed_http
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from ...htserver import exposed_ws
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from ...htserver import WsSession
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from ...htserver import HttpServer
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# =====
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class PstServer(HttpServer): # pylint: disable=too-many-arguments,too-many-instance-attributes
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def __init__( # pylint: disable=too-many-arguments,too-many-locals
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self,
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storage_path: str,
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ro_retries_delay: float,
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ro_cleanup_delay: float,
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remount_cmd: List[str],
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) -> None:
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super().__init__()
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self.__data_path = os.path.join(storage_path, "data")
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self.__ro_retries_delay = ro_retries_delay
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self.__ro_cleanup_delay = ro_cleanup_delay
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self.__remount_cmd = remount_cmd
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self.__notifier = aiotools.AioNotifier()
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# ===== WEBSOCKET
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@exposed_http("GET", "/ws")
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async def __ws_handler(self, request: Request) -> WebSocketResponse:
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async with self._ws_session(request) as ws:
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await ws.send_event("loop", {})
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return (await self._ws_loop(ws))
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@exposed_ws("ping")
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async def __ws_ping_handler(self, ws: WsSession, _: Dict) -> None:
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await ws.send_event("pong", {})
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# ===== SYSTEM STUFF
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async def _init_app(self) -> None:
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if (await self.__remount_storage(rw=True)):
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await self.__remount_storage(rw=False)
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aiotools.create_deadly_task("Controller", self.__controller())
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self._add_exposed(self)
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async def _on_shutdown(self) -> None:
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logger = get_logger(0)
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logger.info("Stopping system tasks ...")
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await aiotools.stop_all_deadly_tasks()
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logger.info("Disconnecting clients ...")
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await self.__broadcast_storage_state(len(self._get_wss()), False)
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if (await self._close_all_wss()):
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await asyncio.sleep(self.__ro_cleanup_delay)
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logger.info("On-Shutdown complete")
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async def _on_cleanup(self) -> None:
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logger = get_logger(0)
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await self.__remount_storage(rw=False)
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logger.info("On-Cleanup complete")
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async def _on_ws_opened(self) -> None:
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await self.__notifier.notify()
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async def _on_ws_closed(self) -> None:
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await self.__notifier.notify()
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# ===== SYSTEM TASKS
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async def __controller(self) -> None:
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prev: int = 0
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while True:
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cur = len(self._get_wss())
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if cur > 0:
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if not self.__is_write_available():
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await self.__remount_storage(rw=True)
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elif prev > 0 and cur == 0:
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while not (await self.__remount_storage(rw=False)):
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if len(self._get_wss()) > 0:
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continue
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await asyncio.sleep(self.__ro_retries_delay)
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await self.__broadcast_storage_state(cur, self.__is_write_available())
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prev = cur
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await self.__notifier.wait()
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async def __broadcast_storage_state(self, clients: int, write_allowed: bool) -> None:
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await self._broadcast_ws_event("storage_state", {
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"clients": clients,
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"data": {
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"path": self.__data_path,
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"write_allowed": write_allowed,
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},
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})
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def __is_write_available(self) -> bool:
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try:
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return (not (os.statvfs(self.__data_path).f_flag & os.ST_RDONLY))
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except Exception as err:
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get_logger(0).info("Can't get filesystem state of PST (%s): %s",
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self.__data_path, tools.efmt(err))
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return False
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async def __remount_storage(self, rw: bool) -> bool:
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return (await aiohelpers.remount("PST", self.__remount_cmd, rw))
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