134 lines
4.3 KiB
Python
134 lines
4.3 KiB
Python
import logging, traceback
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from config import Config
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#import gc
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from messages import Message, hex_dump_memory
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logger = logging.getLogger('conn')
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class AsyncStream(Message):
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def __init__(self, reader, writer, addr, remote_stream, server_side: bool) -> None:
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super().__init__()
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self.reader = reader
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self.writer = writer
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self.remoteStream = remote_stream
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self.server_side = server_side
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self.addr = addr
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self.unique_id = 0
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self.node_id = ''
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'''
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Our puplic methods
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'''
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def set_serial_no(self, serial_no : str):
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logger.info(f'SerialNo: {serial_no}')
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if self.unique_id != serial_no:
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inverters = Config.get('inverters')
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#logger.debug(f'Inverters: {inverters}')
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if serial_no in inverters:
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logger.debug(f'SerialNo {serial_no} allowed!')
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inv = inverters[serial_no]
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self.node_id = inv['node_id']
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self.sug_area = inv['suggested_area']
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else:
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logger.debug(f'SerialNo {serial_no} not known!')
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self.node_id = ''
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self.sug_area = ''
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if not inverters['allow_all']:
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self.unique_id = None
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logger.error('ignore message from unknow inverter!')
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return
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self.unique_id = serial_no
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async def loop(self) -> None:
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while True:
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try:
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await self.__async_read()
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if self.id_str:
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self.set_serial_no(self.id_str.decode("utf-8"))
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if self.unique_id:
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await self.__async_write()
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await self.__async_forward()
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await self.async_publ_mqtt()
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except (ConnectionResetError,
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ConnectionAbortedError,
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RuntimeError) as error:
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logger.error(f'In loop for {self.addr}: {error}')
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self.close()
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return
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except Exception:
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logger.error(
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f"Exception for {self.addr}:\n"
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f"{traceback.format_exc()}")
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self.close()
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return
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def disc(self) -> None:
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logger.debug(f'in AsyncStream.disc() {self.addr}')
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self.writer.close()
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def close(self):
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logger.debug(f'in AsyncStream.close() {self.addr}')
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self.writer.close()
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super().close() # call close handler in the parent class
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# logger.info (f'AsyncStream refs: {gc.get_referrers(self)}')
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'''
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Our private methods
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'''
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async def __async_read(self) -> None:
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data = await self.reader.read(4096)
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if data:
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self._recv_buffer += data
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self.read() # call read in parent class
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else:
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raise RuntimeError("Peer closed.")
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async def __async_write(self) -> None:
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if self._send_buffer:
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hex_dump_memory(logging.INFO, f'Transmit to {self.addr}:', self._send_buffer, len(self._send_buffer))
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self.writer.write(self._send_buffer)
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await self.writer.drain()
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self._send_buffer = bytearray(0) #self._send_buffer[sent:]
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async def __async_forward(self) -> None:
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if self._forward_buffer:
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if not self.remoteStream:
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await self.async_create_remote() # only implmeneted for server side => syncServerStream
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if self.remoteStream:
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hex_dump_memory(logging.DEBUG, f'Forward to {self.remoteStream.addr}:', self._forward_buffer, len(self._forward_buffer))
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self.remoteStream.writer.write (self._forward_buffer)
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await self.remoteStream.writer.drain()
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self._forward_buffer = bytearray(0)
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async def async_create_remote(self) -> None:
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pass
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async def async_publ_mqtt(self) -> None:
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pass
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def __del__ (self):
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logging.debug (f"AsyncStream.__del__ {self.addr}")
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super().__del__()
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