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