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system.py
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system.py
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"""System utilities used by the sipclient scripts"""
__all__ = ['IPAddressMonitor', 'copy_default_certificates']
import os
import shutil
from application.notification import NotificationCenter, NotificationData
from application.system import host, makedirs
from eventlib import api
from sipclient.configuration import config_directory
from sipclient.configuration.datatypes import ResourcePath
from sipsimple.threading import run_in_twisted_thread
from sipsimple.threading.green import run_in_green_thread
class IPAddressMonitor(object):
"""
An object which monitors the IP address used for the default route of the
host and posts a SystemIPAddressDidChange notification when a change is
detected.
"""
def __init__(self):
self.greenlet = None
@run_in_green_thread
def start(self):
notification_center = NotificationCenter()
if self.greenlet is not None:
return
self.greenlet = api.getcurrent()
current_address = host.default_ip
while True:
new_address = host.default_ip
# make sure the address stabilized
api.sleep(5)
if new_address != host.default_ip:
continue
if new_address != current_address:
notification_center.post_notification(name='SystemIPAddressDidChange', sender=self, data=NotificationData(old_ip_address=current_address, new_ip_address=new_address))
current_address = new_address
api.sleep(5)
@run_in_twisted_thread
def stop(self):
if self.greenlet is not None:
api.kill(self.greenlet, api.GreenletExit())
self.greenlet = None
def copy_default_certificates():
default_tls_certificate = ResourcePath('tls/default.crt').normalized
local_tls_certificate = os.path.join(config_directory, 'tls/default.crt')
if not os.path.isfile(local_tls_certificate):
makedirs(os.path.join(config_directory, 'tls'))
shutil.copy(default_tls_certificate, local_tls_certificate)
default_tls_ca = ResourcePath('tls/ca.crt').normalized
local_tls_ca = os.path.join(config_directory, 'tls/ca.crt')
if not os.path.isfile(local_tls_ca):
makedirs(os.path.join(config_directory, 'tls'))
shutil.copy(default_tls_ca, local_tls_ca)

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