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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/>. #
# #
# ========================================================================== #
from typing import Tuple
from typing import Dict
from typing import AsyncGenerator
import aiohttp
from .. import htclient
# =====
class StreamerError(Exception):
pass
# =====
class StreamerClient:
def __init__(
self,
host: str,
port: int,
unix_path: str,
timeout: float,
user_agent: str,
) -> None:
assert port or unix_path
self.__host = host
self.__port = port
self.__unix_path = unix_path
self.__timeout = timeout
self.__user_agent = user_agent
async def read_stream(self) -> AsyncGenerator[Tuple[bool, int, int, bytes], None]:
try:
async with self.__make_http_session(infinite=True) as session:
async with session.get(
url=self.__make_url("stream"),
params={"extra_headers": "1"},
) as response:
htclient.raise_not_200(response)
reader = aiohttp.MultipartReader.from_response(response)
while True:
frame = await reader.next() # pylint: disable=not-callable
if not isinstance(frame, aiohttp.BodyPartReader):
raise RuntimeError("Expected body part")
if hasattr(frame, "_content"):
if frame._content.is_eof(): # pylint: disable=protected-access
break
data = bytes(await frame.read())
if not data:
break
yield (
(frame.headers["X-UStreamer-Online"] == "true"),
int(frame.headers["X-UStreamer-Width"]),
int(frame.headers["X-UStreamer-Height"]),
data,
)
except Exception as err: # Тут бывают и ассерты, и KeyError, и прочая херня из-за корявых исключений в MultipartReader
raise StreamerError(f"{type(err).__name__}: {err}")
raise StreamerError("Reached EOF")
# async def get_snapshot(self) -> Tuple[bool, bytes]:
# async with self.__make_http_session(infinite=False) as session:
# async with session.get(self.__make_url("snapshot")) as response:
# htclient.raise_not_200(response)
# return (
# (response.headers["X-UStreamer-Online"] == "true"),
# bytes(await response.read()),
# )
def __make_http_session(self, infinite: bool) -> aiohttp.ClientSession:
kwargs: Dict = {"headers": {"User-Agent": self.__user_agent}}
if infinite:
kwargs["timeout"] = aiohttp.ClientTimeout(
connect=self.__timeout,
sock_read=self.__timeout,
)
else:
kwargs["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}"
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