115 lines
3.8 KiB
Python
115 lines
3.8 KiB
Python
# Python imports
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import os
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import threading
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import time
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from multiprocessing.connection import Client
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from multiprocessing.connection import Listener
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# Lib imports
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# Application imports
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from .singleton import Singleton
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class IPCServer(Singleton):
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""" Create a listener so that other {app_name} instances send requests back to existing instance. """
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def __init__(self, ipc_address: str = '127.0.0.1', conn_type: str = "socket"):
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self.is_ipc_alive = False
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self._ipc_port = 4848
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self._ipc_address = ipc_address
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self._conn_type = conn_type
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self._ipc_authkey = b'' + bytes(f'{app_name}-ipc', 'utf-8')
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self._ipc_timeout = 15.0
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if conn_type == "socket":
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self._ipc_address = f'/tmp/{app_name}-ipc.sock'
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elif conn_type == "full_network":
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self._ipc_address = '0.0.0.0'
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elif conn_type == "full_network_unsecured":
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self._ipc_authkey = None
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self._ipc_address = '0.0.0.0'
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elif conn_type == "local_network_unsecured":
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self._ipc_authkey = None
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self._subscribe_to_events()
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def _subscribe_to_events(self):
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event_system.subscribe("post_file_to_ipc", self.send_ipc_message)
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def create_ipc_listener(self) -> None:
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if self._conn_type == "socket":
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if os.path.exists(self._ipc_address) and settings.is_dirty_start():
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os.unlink(self._ipc_address)
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listener = Listener(address=self._ipc_address, family="AF_UNIX", authkey=self._ipc_authkey)
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elif "unsecured" not in self._conn_type:
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listener = Listener((self._ipc_address, self._ipc_port), authkey=self._ipc_authkey)
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else:
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listener = Listener((self._ipc_address, self._ipc_port))
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self.is_ipc_alive = True
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self._run_ipc_loop(listener)
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@daemon_threaded
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def _run_ipc_loop(self, listener) -> None:
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# NOTE: Not thread safe if using with Gtk. Need to import GLib and use idle_add
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while True:
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try:
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conn = listener.accept()
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start_time = time.perf_counter()
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self._handle_ipc_message(conn, start_time)
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except Exception as e:
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...
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listener.close()
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def _handle_ipc_message(self, conn, start_time) -> None:
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while True:
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msg = conn.recv()
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if settings.is_debug():
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print(msg)
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if "FILE|" in msg:
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file = msg.split("FILE|")[1].strip()
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if file:
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event_system.emit("handle_file_from_ipc", file)
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if "DIR|" in msg:
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file = msg.split("DIR|")[1].strip()
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if file:
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event_system.emit("handle_dir_from_ipc", file)
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conn.close()
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break
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if msg in ['close connection', 'close server']:
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conn.close()
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break
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# NOTE: Not perfect but insures we don't lock up the connection for too long.
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end_time = time.perf_counter()
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if (end_time - start_time) > self._ipc_timeout:
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conn.close()
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break
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def send_ipc_message(self, message: str = "Empty Data...") -> None:
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try:
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if self._conn_type == "socket":
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conn = Client(address=self._ipc_address, family="AF_UNIX", authkey=self._ipc_authkey)
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elif "unsecured" not in self._conn_type:
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conn = Client((self._ipc_address, self._ipc_port), authkey=self._ipc_authkey)
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else:
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conn = Client((self._ipc_address, self._ipc_port))
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conn.send(message)
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conn.close()
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except ConnectionRefusedError as e:
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print("Connection refused...")
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except Exception as e:
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print(repr(e))
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