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File Manager
File Manager
Viewing File: user_manager.py
# -*- coding: utf-8 -*-
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
"""
This module contains class implementing part of X-Ray Manager
related to User Agent management (enable/disable/status)
"""
import os
import subprocess
import logging
from xray import gettext as _
from .exceptions import XRayManagerError
from clcommon.utils import is_ubuntu
class ManageUserAgent:
"""
Manager actions related to user plugin
"""
def __init__(self):
self.service_name = 'xray-user-agent'
self.service_socket = 'xray-user-agent.socket'
self.logger = logging.getLogger('user_plugin_manager')
self.subprocess_errors = (
OSError, ValueError, subprocess.SubprocessError
)
@staticmethod
def is_systemd():
"""
Check for systemd available
"""
return os.path.isfile('/bin/systemctl')
def _run_external(self, *args, capture_output=True, text=True,
check=False) -> subprocess.CompletedProcess:
"""
Call subprocess described with given *args
"""
try:
result = subprocess.run(args,
capture_output=capture_output,
text=text,
check=check)
self.logger.info("Command '%s' succeeded", {' '.join(args)})
except subprocess.CalledProcessError as e:
self.logger.error("External command '%s' failed with code %s: %s",
e.cmd, e.returncode, e.stdout or e.stderr,
extra={'cmd': e.cmd, 'retcode': e.returncode,
'stdout': e.stdout, 'stderr': e.stderr})
raise XRayManagerError(
_("External command '{}' failed with code {}: {}".format(str(e.cmd),
str(e.returncode),
str(e.stderr) or str(e.stderr))))
except self.subprocess_errors as e:
self.logger.error("Failed to run '%s' external command",
' '.join(args),
extra={'err': str(e)})
raise XRayManagerError(
_("Failed to run '{}' external command: {}".format(' '.join(args), str(e))))
return result
def _autostart(self, switch=True):
"""
Switch autostart ON or OFF
"""
autostart_select = {
True: ('enable', 'on'),
False: ('disable', 'off')
}
if self.is_systemd():
self._run_external('/bin/systemctl',
autostart_select[switch][0],
self.service_socket)
else:
self._run_external('/sbin/chkconfig',
self.service_name,
autostart_select[switch][1])
def user_agent_service(self, command: str, socket_unit=False,
check_retcode=False) -> subprocess.CompletedProcess:
"""
Run /sbin/service utility to make given operation
with X-Ray User Agent service
:command: command to invoke
:check_retcode: whether to run with check or not
:return: subprocess info about completed process
"""
if is_ubuntu():
srv = self.service_name
else:
srv = self.service_socket if socket_unit else self.service_name
try:
return self._run_external('/sbin/service', srv, command,
check=check_retcode)
except XRayManagerError as e:
raise XRayManagerError(_("X-Ray User Agent '{}' failed: {}".format(command, str(e.reason))))
def enable(self) -> 'json str':
"""
Enable X-Ray User Agent:
start or restart service if it is accidentally already running
For systemd systems -- start socket unit only
For SysV -- start the entire service
:return: JSON encoded result of enable action
"""
self._autostart()
agent_status = self.user_agent_service('status')
if agent_status.returncode:
if self.is_systemd():
self.user_agent_service('start', socket_unit=True,
check_retcode=True)
else:
self.user_agent_service('start', check_retcode=True)
else:
self.user_agent_service('restart', check_retcode=True)
def disable(self) -> 'json str':
"""
Disable X-Ray User Agent:
stop the entire service
or do nothing if it is accidentally not running
For systemd systems -- also check if socket unit is running
and stop it too
:return: JSON encoded result of disable action
"""
self._autostart(False)
agent_status = self.user_agent_service('status')
if not agent_status.returncode:
self.user_agent_service('stop', check_retcode=True)
if self.is_systemd():
if not self.user_agent_service('status',
socket_unit=True).returncode:
self.user_agent_service('stop', socket_unit=True,
check_retcode=True)
def status(self) -> 'json str':
"""
Get status of X-Ray User Agent service
:return: JSON encoded result of status action
"""
if self.is_systemd():
_status = self.user_agent_service('status', socket_unit=True)
else:
_status = self.user_agent_service('status')
return 'disabled' if _status.returncode else 'enabled'
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