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Extract some common code into telnet_spot_provier as a base class for DX cluster and RBN
This commit is contained in:
Ian Renton
+29
-112
@@ -1,21 +1,17 @@
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import logging
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import re
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import socket
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from datetime import datetime
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from threading import Event, Lock, Thread
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import pytz
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import telnetlib3
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from core.config import SERVER_OWNER_CALLSIGN
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from data.spot import Spot
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from providers.spot.spot_provider import SpotProvider
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from core.utils import decode_telnet_bytes
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from providers.spot.telnet_spot_provider import TelnetSpotProvider
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logger = logging.getLogger(__name__)
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class DXCluster(SpotProvider):
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class DXCluster(TelnetSpotProvider):
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"""Spot provider for a DX Cluster. Hostname, port, login_prompt, login_callsign and allow_rbn_spots are provided in config.
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See config-example.yml for examples."""
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@@ -32,112 +28,33 @@ class DXCluster(SpotProvider):
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"""Constructor requires hostname and port"""
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name = provider_config.get("name", "Cluster")
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super().__init__(name, provider_config)
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self._hostname = provider_config["host"]
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self._port = provider_config["port"]
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self._login_prompt = provider_config.get("login_prompt", "login:")
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self._login_callsign = provider_config.get("login_callsign", SERVER_OWNER_CALLSIGN)
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self._allow_rbn_spots = provider_config.get("allow_rbn_spots", False)
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self._spot_line_pattern = (
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self._LINE_PATTERN_ALLOW_RBN if self._allow_rbn_spots else self._LINE_PATTERN_EXCLUDE_RBN
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allow_rbn_spots = provider_config.get("allow_rbn_spots", False)
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self._spot_line_pattern = self._LINE_PATTERN_ALLOW_RBN if allow_rbn_spots else self._LINE_PATTERN_EXCLUDE_RBN
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super().__init__(
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name,
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provider_config,
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host=provider_config["host"],
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port=provider_config["port"],
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login_prompt=provider_config.get("login_prompt", "login:"),
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login_response=provider_config.get("login_callsign", SERVER_OWNER_CALLSIGN),
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)
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self._telnet = None
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self._telnet_lock = Lock()
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self._thread = None
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self._stop_event = Event()
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def start(self):
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self._thread = Thread(target=self._handle, name=f"DXClusterSpotProvider-{self.name}", daemon=True)
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self._thread.start()
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def _parse_line(self, line):
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match = self._spot_line_pattern.match(line)
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if not match:
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return None
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def stop(self):
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self._stop_event.set()
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with self._telnet_lock:
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if self._telnet:
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try:
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self._telnet.sock.shutdown(socket.SHUT_RDWR)
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except (AttributeError, OSError):
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pass
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self._telnet.close()
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if self._thread:
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self._thread.join(timeout=5)
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if self._thread.is_alive():
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logger.warning(f"DX Cluster {self._hostname} worker thread did not exit on time and will be killed.")
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def _handle(self):
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while not self._stop_event.is_set():
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connected = False
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while not connected and not self._stop_event.is_set():
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try:
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self.status = "Connecting"
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logger.info(f"DX Cluster {self._hostname} connecting...")
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new_telnet = telnetlib3.Telnet(self._hostname, self._port)
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with self._telnet_lock:
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self._telnet = new_telnet
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if self._stop_event.is_set():
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# stop() was called while we were connecting, close the connection rather than trying to
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# read when we know it won't work
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new_telnet.close()
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break
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self._telnet.read_until(self._login_prompt.encode("latin-1"))
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self._telnet.write(f"{self._login_callsign}\n".encode("latin-1"))
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connected = True
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logger.info(f"DX Cluster {self._hostname} connected.")
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except ConnectionRefusedError:
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self.status = "Error"
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logger.warning(f"Connection refused to DX cluster {self._hostname}")
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self._stop_event.wait(timeout=300)
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except Exception:
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self.status = "Error"
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logger.exception(f"Exception while connecting to DX Cluster Provider ({self._hostname}).")
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self._stop_event.wait(timeout=5)
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self.status = "Waiting for Data"
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while connected and not self._stop_event.is_set():
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try:
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# Check new telnet info against regular expression
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telnet_output = self._telnet.read_until("\n".encode("latin-1"))
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match = self._spot_line_pattern.match(decode_telnet_bytes(telnet_output))
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if match:
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spot_time = datetime.strptime(match.group(5), "%H%MZ").replace(tzinfo=pytz.UTC)
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spot_datetime = datetime.combine(
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datetime.now(pytz.UTC).date(),
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spot_time.time(),
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tzinfo=pytz.UTC,
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)
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spot = Spot(
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source=self.name,
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dx_call=match.group(3),
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de_call=match.group(1),
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freq=float(match.group(2)) * 1000,
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comment=match.group(4).strip(),
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time=spot_datetime.timestamp(),
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)
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# Add to our list
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self._submit(spot)
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self.status = "OK"
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self.last_update_time = datetime.now(pytz.UTC)
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logger.debug(f"Data received from DX Cluster {self._hostname}.")
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except EOFError:
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connected = False
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if not self._stop_event.is_set():
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self.status = "Restarting"
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logger.warning(f"Disconnected from DX Cluster {self._hostname}. Reconnecting...")
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self._stop_event.wait(timeout=5)
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else:
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logger.info(f"DX Cluster {self._hostname} shutting down...")
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self.status = "Shutting down"
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except Exception:
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connected = False
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if not self._stop_event.is_set():
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self.status = "Error"
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logger.exception(f"Exception in DX Cluster Provider ({self._hostname})")
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self._stop_event.wait(timeout=5)
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else:
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logger.info(f"DX Cluster {self._hostname} shutting down...")
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self.status = "Shutting down"
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self.status = "Disconnected"
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spot_time = datetime.strptime(match.group(5), "%H%MZ").replace(tzinfo=pytz.UTC)
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spot_datetime = datetime.combine(
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datetime.now(pytz.UTC).date(),
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spot_time.time(),
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tzinfo=pytz.UTC,
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)
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return Spot(
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source=self.name,
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dx_call=match.group(3),
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de_call=match.group(1),
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freq=float(match.group(2)) * 1000,
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comment=match.group(4).strip(),
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time=spot_datetime.timestamp(),
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)
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