99 lines
4.0 KiB
Python
99 lines
4.0 KiB
Python
# A Demo of a service that takes advantage of the additional notifications
|
|
# available in later Windows versions.
|
|
|
|
# Note that all output is written as event log entries - so you must install
|
|
# and start the service, then look at the event log for messages as events
|
|
# are generated.
|
|
|
|
# Events are generated for USB device insertion and removal, power state
|
|
# changes and hardware profile events - so try putting your computer to
|
|
# sleep and waking it, inserting a memory stick, etc then check the event log
|
|
|
|
# Most event notification support lives around win32gui
|
|
import servicemanager
|
|
import win32con
|
|
import win32event
|
|
import win32gui
|
|
import win32gui_struct
|
|
import win32service
|
|
import win32serviceutil
|
|
|
|
GUID_DEVINTERFACE_USB_DEVICE = "{A5DCBF10-6530-11D2-901F-00C04FB951ED}"
|
|
|
|
|
|
class EventDemoService(win32serviceutil.ServiceFramework):
|
|
_svc_name_ = "PyServiceEventDemo"
|
|
_svc_display_name_ = "Python Service Event Demo"
|
|
_svc_description_ = (
|
|
"Demonstrates a Python service which takes advantage of the extra notifications"
|
|
)
|
|
|
|
def __init__(self, args):
|
|
win32serviceutil.ServiceFramework.__init__(self, args)
|
|
self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
|
|
# register for a device notification - we pass our service handle
|
|
# instead of a window handle.
|
|
filter = win32gui_struct.PackDEV_BROADCAST_DEVICEINTERFACE(
|
|
GUID_DEVINTERFACE_USB_DEVICE
|
|
)
|
|
self.hdn = win32gui.RegisterDeviceNotification(
|
|
self.ssh, filter, win32con.DEVICE_NOTIFY_SERVICE_HANDLE
|
|
)
|
|
|
|
# Override the base class so we can accept additional events.
|
|
def GetAcceptedControls(self):
|
|
# say we accept them all.
|
|
rc = win32serviceutil.ServiceFramework.GetAcceptedControls(self)
|
|
rc |= (
|
|
win32service.SERVICE_ACCEPT_PARAMCHANGE
|
|
| win32service.SERVICE_ACCEPT_NETBINDCHANGE
|
|
| win32service.SERVICE_CONTROL_DEVICEEVENT
|
|
| win32service.SERVICE_ACCEPT_HARDWAREPROFILECHANGE
|
|
| win32service.SERVICE_ACCEPT_POWEREVENT
|
|
| win32service.SERVICE_ACCEPT_SESSIONCHANGE
|
|
)
|
|
return rc
|
|
|
|
# All extra events are sent via SvcOtherEx (SvcOther remains as a
|
|
# function taking only the first args for backwards compat)
|
|
def SvcOtherEx(self, control, event_type, data):
|
|
# This is only showing a few of the extra events - see the MSDN
|
|
# docs for "HandlerEx callback" for more info.
|
|
if control == win32service.SERVICE_CONTROL_DEVICEEVENT:
|
|
info = win32gui_struct.UnpackDEV_BROADCAST(data)
|
|
msg = "A device event occurred: %x - %s" % (event_type, info)
|
|
elif control == win32service.SERVICE_CONTROL_HARDWAREPROFILECHANGE:
|
|
msg = "A hardware profile changed: type=%s, data=%s" % (event_type, data)
|
|
elif control == win32service.SERVICE_CONTROL_POWEREVENT:
|
|
msg = "A power event: setting %s" % data
|
|
elif control == win32service.SERVICE_CONTROL_SESSIONCHANGE:
|
|
# data is a single elt tuple, but this could potentially grow
|
|
# in the future if the win32 struct does
|
|
msg = "Session event: type=%s, data=%s" % (event_type, data)
|
|
else:
|
|
msg = "Other event: code=%d, type=%s, data=%s" % (control, event_type, data)
|
|
|
|
servicemanager.LogMsg(
|
|
servicemanager.EVENTLOG_INFORMATION_TYPE,
|
|
0xF000, # generic message
|
|
(msg, ""),
|
|
)
|
|
|
|
def SvcStop(self):
|
|
self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
|
|
win32event.SetEvent(self.hWaitStop)
|
|
|
|
def SvcDoRun(self):
|
|
# do nothing at all - just wait to be stopped
|
|
win32event.WaitForSingleObject(self.hWaitStop, win32event.INFINITE)
|
|
# Write a stop message.
|
|
servicemanager.LogMsg(
|
|
servicemanager.EVENTLOG_INFORMATION_TYPE,
|
|
servicemanager.PYS_SERVICE_STOPPED,
|
|
(self._svc_name_, ""),
|
|
)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
win32serviceutil.HandleCommandLine(EventDemoService)
|