forked from andrius/neohubapi
Add error checking/exception to connection code.
Add a timeout for async read/write to the stream.
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@ -6,6 +6,7 @@ import asyncio
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import datetime
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import json
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import logging
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import socket
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from async_property import async_cached_property
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from types import SimpleNamespace
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@ -22,27 +23,49 @@ class NeoHubUsageError(Error):
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pass
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class NeoHubConnectionError(Error):
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pass
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class NeoHub:
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def __init__(self, host='Neo-Hub', port=4242):
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def __init__(self, host='Neo-Hub', port=4242, request_timeout=5):
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self._logger = logging.getLogger('neohub')
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self._host = host
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self._port = port
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self._request_timeout = request_timeout
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async def _send(self, message, expected_reply=None):
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reader, writer = await asyncio.open_connection(self._host, self._port)
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async def _send_message(self, reader: asyncio.StreamReader, writer: asyncio.StreamWriter, message: str):
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encoded_message = bytearray(json.dumps(message) + "\0\r", "utf-8")
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self._logger.debug(f"Sending message: {encoded_message}")
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writer.write(encoded_message)
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await writer.drain()
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data = await reader.readuntil(b'\0')
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data = data.strip(b'\0')
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json_string = data.decode('utf-8')
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self._logger.debug(f"Received message: {json_string}")
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writer.close()
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await writer.wait_closed()
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data = data.strip(b'\0')
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return data
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async def _send(self, message, expected_reply=None):
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try:
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reader, writer = await asyncio.open_connection(self._host, self._port)
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except (socket.gaierror, ConnectionRefusedError) as e:
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err = f'Could not connect to NeoHub at {self._host}: {e}'
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self._logger.error(err)
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raise NeoHubConnectionError from e
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try:
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data = await asyncio.wait_for(
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self._send_message(reader, writer, message), timeout=self._request_timeout)
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except asyncio.TimeoutError as e:
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self._logger.error(f'Timeout talking to NeoHub: {e}')
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return False
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json_string = data.decode('utf-8')
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self._logger.debug(f"Received message: {json_string}")
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try:
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reply = json.loads(json_string, object_hook=lambda d: SimpleNamespace(**d))
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except json.decoder.JSONDecodeError as e:
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