#Using Python to create windows service #Template

import win32serviceutil
import win32event
import servicemanager

class MyService(win32serviceutil.ServiceFramework):
	_svc_name_ = 'KennySrv'
	_svc_display_name_ = 'Kenny Test Service'
	_svc_description_ = 'Test Kenny Service'

	def __init__(self, args):
    	win32serviceutil.ServiceFramework.__init__(self, args)
    	self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
	
	def SvcDoRun(self):
		self.ReportServiceStatus(win32service.SERVICE_START_PENDING) 
		self.ReportServiceStatus(win32service.SERVICE_RUNNING)
		...
		win32event.WaitForSingleObject(self.stop_event, win32event.INFINITE)
	
	def SvcStop(self):
		self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
		...
		win32event.SetEvent(self.stop_event)
    	self.ReportServiceStatus(win32service.SERVICE_STOPPED)

Using the win32serviceutil.ServiceFramewok and implement above these function. Note that the keyword _svc_name_, _svc_display_name_ and _svc_description_ is the windwos service keyword. To explain below

• _svc_name_ : It's a name for Windows Service Name, this name could be the same name of the Class Name, or could not, for example, the Class Name is MyService, the svc_name could be the same (MyService) or other name (KennySrv). The important thing is, when load the service into the windows, we must be to use the srv_name, not class name!
• _svc_display_name_ : When service is loaded, Windows service manager will show this display name
• _svc_description_ : It's just a description and will be put the note.

##Test Method

When you write down the code which name is MyService.py for example, you cane use the pythonic way to test, the instruction list below.

1. python MyService.py install (install the service to windows)
2. net start KennySrv (if the _srv_name_ is KennySrv)
3. All of the message will be output to Event viewer, You can open the start menu and type the evnetvwr to open this application. (Windows Logs --> Application)
4. net stop KennySrv (stop the service from windows)
5. python MyService.py remove (remove the servie from windows service register list)

If your python script has been converted to executable file(using pyinstaller or py2exe), then you can just do the same thing but no python keyword

1. MyService.exe install
2. net start KennySrv
3. net stop KennySrv
4. MyService.exe remove

You can open the debug mode like this

• python MyService.py debug, or
• MyService.exe debug All of the messages will be output to console screen.

If you use net command to start the service but the servies can't run successfully, restart again, it will be ok.

• NET COMMAND: The net use command is a Command Prompt command that's used to connect to, remove, and configure connections to shared resources, like mapped drives and network printers.
• SC COMMAND: Service Control - Create, Start, Stop, Query or Delete any Windows SERVICE. The command options for SC are case sensitive.

Using the sc command to create service, the instruction is below

sc create [_srv_name_] binpath= "The full path of your executable file full"

for example:

sc create KennySrv binpath= "C:\abc\def\MyService.exe"

sc start [_srv_name_]

for example

sc start KennySrv

sc stop [_srv_name_]

for example

sc stop KennySrv

sc delete [_srv_name_]

for example

sc delete KennySrv

When you install the service by executable file (like MyServie.exe install), you can remove(delete) this service by sc, just use sc delete command :)

Important Note: the option binpath= or other options of sc must be followed by the one space character(blank), if you have not this, the sc command will show syntax error message.

For example

• Wrong way: binpath="C:\abc\def\MyService.exe"
• Right way: binpath= "C:\abc\def\MyService.exe"