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|
# ========================================================================== #
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2020 Maxim Devaev <[email protected]> #
# #
# 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 contextlib
import types
from typing import Tuple
from typing import Dict
from typing import Set
from typing import Callable
from typing import Type
from typing import AsyncGenerator
from typing import Optional
import aiohttp
from .. import aiotools
# =====
class _BaseApiPart:
def __init__(
self,
ensure_http_session: Callable[[], aiohttp.ClientSession],
make_url: Callable[[str], str],
) -> None:
self._ensure_http_session = ensure_http_session
self._make_url = make_url
class _AuthApiPart(_BaseApiPart):
async def check(self) -> bool:
session = self._ensure_http_session()
try:
async with session.get(self._make_url("auth/check")) as response:
aiotools.raise_not_200(response)
return True
except aiohttp.ClientResponseError as err:
if err.status in [401, 403]:
return False
raise
class _StreamerApiPart(_BaseApiPart):
async def set_params(self, quality: int, desired_fps: int) -> None:
session = self._ensure_http_session()
async with session.post(
url=self._make_url("streamer/set_params"),
params={"quality": quality, "desired_fps": desired_fps},
) as response:
aiotools.raise_not_200(response)
class _HidApiPart(_BaseApiPart):
async def get_keymaps(self) -> Tuple[str, Set[str]]:
session = self._ensure_http_session()
async with session.get(self._make_url("hid/keymaps")) as response:
aiotools.raise_not_200(response)
result = (await response.json())["result"]
return (result["keymaps"]["default"], set(result["keymaps"]["available"]))
async def print(self, text: str, limit: int, keymap_name: str) -> None:
session = self._ensure_http_session()
async with session.post(
url=self._make_url("hid/print"),
params={"limit": limit, "keymap": keymap_name},
data=text,
) as response:
aiotools.raise_not_200(response)
class _AtxApiPart(_BaseApiPart):
async def get_state(self) -> Dict:
session = self._ensure_http_session()
async with session.get(self._make_url("atx")) as response:
aiotools.raise_not_200(response)
return (await response.json())["result"]
async def switch_power(self, action: str) -> bool:
session = self._ensure_http_session()
try:
async with session.post(
url=self._make_url("atx/power"),
params={"action": action},
) as response:
aiotools.raise_not_200(response)
return True
except aiohttp.ClientResponseError as err:
if err.status == 409:
return False
raise
class KvmdClientSession:
def __init__(
self,
make_http_session: Callable[[], aiohttp.ClientSession],
make_url: Callable[[str], str],
) -> None:
self.__make_http_session = make_http_session
self.__make_url = make_url
self.__http_session: Optional[aiohttp.ClientSession] = None
args = (self.__ensure_http_session, make_url)
self.auth = _AuthApiPart(*args)
self.streamer = _StreamerApiPart(*args)
self.hid = _HidApiPart(*args)
self.atx = _AtxApiPart(*args)
@contextlib.asynccontextmanager
async def ws(self) -> AsyncGenerator[aiohttp.ClientWebSocketResponse, None]:
session = self.__ensure_http_session()
async with session.ws_connect(self.__make_url("ws")) as ws:
yield ws
def __ensure_http_session(self) -> aiohttp.ClientSession:
if not self.__http_session:
self.__http_session = self.__make_http_session()
return self.__http_session
async def close(self) -> None:
if self.__http_session:
await self.__http_session.close()
self.__http_session = None
async def __aenter__(self) -> "KvmdClientSession":
return self
async def __aexit__(
self,
_exc_type: Type[BaseException],
_exc: BaseException,
_tb: types.TracebackType,
) -> None:
await self.close()
class KvmdClient:
def __init__(
self,
host: str,
port: int,
unix_path: str,
timeout: float,
user_agent: str,
) -> None:
self.__host = host
self.__port = port
self.__unix_path = unix_path
self.__timeout = timeout
self.__user_agent = user_agent
def make_session(self, user: str, passwd: str) -> KvmdClientSession:
return KvmdClientSession(
make_http_session=(lambda: self.__make_http_session(user, passwd)),
make_url=self.__make_url,
)
def __make_http_session(self, user: str, passwd: str) -> aiohttp.ClientSession:
kwargs: Dict = {
"headers": {
"X-KVMD-User": user,
"X-KVMD-Passwd": passwd,
"User-Agent": self.__user_agent,
},
"timeout": aiohttp.ClientTimeout(total=self.__timeout),
}
if self.__unix_path:
kwargs["connector"] = aiohttp.UnixConnector(path=self.__unix_path)
return aiohttp.ClientSession(**kwargs)
def __make_url(self, handle: str) -> str:
assert not handle.startswith("/"), handle
return f"http://{self.__host}:{self.__port}/{handle}"
|
