300 lines
8.7 KiB
Python
300 lines
8.7 KiB
Python
# -*- coding: utf-8 -*-
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"""Daemon for local execution of commands."""
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import functools
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import json
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import lockfile
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import logging
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import logging.handlers
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import os
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import queue
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import signal
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import sys
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import threading
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import typing as T
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from bot_z.bot_z import Operator
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from bot_z.utils import Fifo, PLifo, cmd_marshal, cmd_unmarshal
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import daemon
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from selenium.webdriver.common.keys import Keys
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daemon_format = logging.Formatter("%(levelname)s: [%(name)s] -> %(message)s")
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console = logging.StreamHandler(stream=sys.stdout)
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console.setFormatter(daemon_format)
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console.addFilter(logging.Filter(__name__))
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syslog = logging.handlers.SysLogHandler(address="/dev/log")
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syslog.setFormatter(daemon_format)
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logger = logging.getLogger(__name__)
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logger.setLevel(os.environ.get("BOTZ_LOGLEVEL", logging.INFO))
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logger.addHandler(console)
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logger.addHandler(syslog)
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logger.debug("Init at debug")
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class StopDaemon(Exception):
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"""Auxiliary exception to help stop the program in daemon mode."""
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pass
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def start_daemon(
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name: str,
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base_uri: str,
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timeout: int = None,
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proxy: T.Optional[T.Tuple[str, int]] = None,
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headless: bool = True,
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debug: bool = False,
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) -> Operator:
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"""
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Spawns the Operator object.
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"""
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optional_args: T.Dict[str, T.Any] = {}
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if timeout is not None:
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optional_args["timeout"] = timeout
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if proxy is not None:
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optional_args["proxy"] = proxy
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optional_args["headless"] = headless
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optional_args["debug"] = debug
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logger.info("Started Operator.")
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logger.debug(
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"Operator parameters: "
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"{base_uri: %s, name: %s, timeout: %s, proxy: %s, headless: %s, debug: %s}",
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base_uri,
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name,
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timeout,
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proxy,
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headless,
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debug,
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)
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return Operator(base_uri=base_uri, name=name, **optional_args)
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def operator_drop(op: Operator) -> None:
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"""
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Stops the Operator.
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"""
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logger.debug("Stopping Operator...")
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logger.debug("Operator id: %s", id(op))
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op.quit()
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logger.info("Stopped Operator.")
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def operator_reload(op: Operator) -> None:
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"""
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Reload the Operator using the same object.
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"""
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op_focus = op.switch_to.active_element
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op_focus.send_keys(Keys.CONTROL + "Escape")
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op.delete_all_cookies()
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logger.info("Operator session cleaned.")
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def operator_status(op: Operator, debug: bool = False) -> T.Dict[str, str]:
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"""
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Get the current operator status.
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"""
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status = {} # type: T.Dict[str, str]
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status["is_logged_in"] = str(op.logged_in)
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status["is_checked_in"] = str(op.checked_in)
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if debug:
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status["interal_state"] = str(dir(op))
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logger.info("Status: %s", status)
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return status
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def operator_login(op: Operator, username: str, password: str, force: bool) -> None:
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"""
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Instructs the operator to perform login.
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"""
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logger.debug("Performing login.")
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op.login(username, password, force)
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logger.info("Login done.")
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def operator_logout(op: Operator, username: str, force: bool) -> None:
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"""
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Instructs the operator to perform logout.
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"""
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logger.debug("Performing logout.")
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op.logout(username, password, force)
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logger.info("Logout done.")
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def daemon_process(
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fifo_path: str,
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working_dir: str,
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umask: int,
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pidfile: lockfile.FileLock,
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base_uri: str,
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timeout: int = None,
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proxy: T.Optional[T.Tuple[str, int]] = None,
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headless: bool = True,
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debug: bool = False,
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foreground: bool = False,
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) -> None:
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"""
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The daemon function.
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"""
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if debug:
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logger.setLevel(logging.DEBUG)
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lifo_path = os.path.join(working_dir, "botz_open_daemons.list")
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if os.path.exists(lifo_path):
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logger.warning("Lifo (%s) exists. Removing!", lifo_path)
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os.remove(lifo_path)
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starter = functools.partial(
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start_daemon,
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base_uri=base_uri,
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timeout=timeout,
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proxy=proxy,
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headless=headless,
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debug=debug,
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)
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def stop_all() -> None:
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pass
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def reload_all() -> None:
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pass
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def list_all() -> None:
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pass
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context = daemon.DaemonContext(
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working_directory=working_dir, umask=umask, pidfile=pidfile
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)
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logger.debug("context defined")
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context.signal_map = {
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signal.SIGTERM: stop_all,
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signal.SIGHUP: "terminate",
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signal.SIGUSR1: reload_all,
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signal.SIGUSR2: list_all,
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}
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logger.debug("signal map defined")
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cmd_map = {
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"start": starter,
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"stop": operator_drop,
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"reload": operator_reload,
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"status": operator_status,
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"login": operator_login,
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"logout": operator_logout,
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}
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logger.debug("command map defined")
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if foreground:
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logger.debug("Started in foreground")
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try:
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listen_commands(lifo_path, fifo_path, cmd_map)
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except KeyboardInterrupt:
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logger.info("Process killed!")
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finally:
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os.remove(lifo_path)
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return
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with context:
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logger.debug("Started in background")
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try:
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listen_commands(lifo_path, fifo_path, cmd_map)
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except StopDaemon:
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os.remove(lifo_path)
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return
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def listen_client(
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name: str, chan: queue.Queue, cmd_map: T.Dict[str, T.Callable]
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) -> None:
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"""
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The listen loop for an operator instance.
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"""
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op = cmd_map["start"](name)
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logger.debug("Started operator id: %s", id(op))
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while True:
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cmd = chan.get()
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if cmd["name"] != name:
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log.warning("Command sent to the wrong instance: %s\n%s", name, cmd)
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continue
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if cmd["cmd"] == "start":
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logger.error("Alredy started: %s", name)
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continue
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if cmd["cmd"] == "stop":
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logger.debug("Received command: stop")
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cmd_map["stop"](op)
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return
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elif cmd["cmd"] == "reload":
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logger.debug("Received command: reload")
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cmd_map["reload"](op)
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elif cmd["cmd"] == "status":
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logger.debug("Received command: status")
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status = cmd_map["status"](op)
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logger.debug("Status: %s", status)
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with Fifo(cmd["rfifo_path"], "w") as rfifo:
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rfifo.write(cmd_marshal(name=cmd["name"], cmd=status))
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def listen_commands(
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lifopath: str, fifopath: str, cmd_map: T.Dict[str, T.Callable]
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) -> None:
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"""
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The main loop to listen incoming commands.
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"""
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client_chans = {}
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while True:
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with Fifo(fifopath) as fifo:
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for cmd_str in fifo:
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logger.debug("Command received in main loop: %s", cmd_str)
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cmd = cmd_unmarshal(cmd_str)
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logger.debug("Cmd unmarshalled: %s", cmd)
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if cmd["cmd"] == "start":
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if cmd["name"] not in client_chans:
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client_chans[cmd["name"]] = queue.Queue(1)
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logger.debug('Queue created for "%s".', cmd["name"])
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if cmd["name"] in PLifo.All(lifopath):
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logger.warning("Name %s is yet used. Not proceeding.", name)
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continue
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logger.debug(
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'"%s" being pushed onto "%s"...', cmd["name"], lifopath
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)
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PLifo.Push(lifopath, cmd["name"])
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logger.debug("Client %s has been newly created.", cmd["name"])
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chan = client_chans.get(cmd["name"], None)
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logger.debug("Starting new client in a thread...")
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client = threading.Thread(
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name=cmd["name"],
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target=functools.partial(
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listen_client, name=cmd["name"], chan=chan, cmd_map=cmd_map
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),
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)
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client.start()
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logger.debug('Client "%s" started.', cmd["name"])
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continue
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if cmd["cmd"] == "stop-daemon":
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stop_all(client_chans)
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logger.info("Daemon clients stopped. Exiting...")
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raise StopDaemon
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logger.debug("Opening client: %s", cmd["name"])
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chan = client_chans.get(cmd["name"], None)
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if chan is None:
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logger.warning(
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'No client found with name "%s". Skipping.', cmd["name"]
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)
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continue
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chan.put(cmd)
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def stop_all(client_chans: T.Dict[str, queue.Queue]) -> None:
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"""
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Send the stop command to all the clients.
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"""
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for name, chan in client_chans.items():
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logger.debug('Stopping "%s"...', name)
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chan.put({"name": name, "cmd": "stop"})
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logger.info("Stopped %s.", name)
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