How make a python windows service of a flask/gevent.socketio server?

To stop it from SvcStop you need to store a reference to "ws" in a global variable (that is, somewhere where it can be retrieved later on). AFAIK "ws.kill()" should then end the loop.

The run_with_reloader decorator appears to run the decorated function immediately, which would explain why the command-line is processed after running the web server. Do you need auto reloading, appearently the decorator only needed when you need reloading.

UPDATE: added example service code

In a project not using flask or gevent I use something like this (with lots of details removed):

class Service (win32serviceutil.ServiceFramework):   def __init__(self, *args, **kwds):       self._mainloop = None       win32serviceutil.ServiceFramework.__init__(self, *args, **kwds)   def SvcStop(self):       self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)       if self._mainloop is not None:           self._mainloop.shutdown()    def SvcStart(self):        self.ReportServiceStatus(win32service.SERVICE_START_PENDING)        self._mainloop = ... .MainLoop()        self.ReportServiceStatus(win32service.SERVICE_RUNNING)        try:            self._mainloop.run_forever()        finally:            self.ReportServiceStatus(win32service.SERVICE_STOPPED)win32serviceutil.HandleCommandLine(Service)

The method serve_forever comes from BaseServer.serve_forever. To stop it, you must call BaseServer.shutdown() or a derivative of it.

In short, you must declare ws in the global scope. Putting this code before your Service class definition is one way to do it.

ws = None

Then change your Service.SvcStop implementation to this :

def SvcStop(self):    self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)    #Tell the serve_forever() loop to stop and wait until it does.     ws.shutdown()

Since ws.shutdown() already waits for the listener to stop, you can get rid of self.hWaitStop, unless you use it somewhere else in your code.

Requires Python 2.6+

I can't access WSGIRequestHandler in Flask outside request, so I use Process.

import win32serviceutilimport win32serviceimport win32eventimport servicemanagerfrom multiprocessing import Processfrom app import appclass Service(win32serviceutil.ServiceFramework):    _svc_name_ = "TestService"    _svc_display_name_ = "Test Service"    _svc_description_ = "Tests Python service framework by receiving and echoing messages over a named pipe"    def __init__(self, *args):        super().__init__(*args)    def SvcStop(self):        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)        self.process.terminate()        self.ReportServiceStatus(win32service.SERVICE_STOPPED)    def SvcDoRun(self):        self.process = Process(target=self.main)        self.process.start()        self.process.run()    def main(self):        app.run()if __name__ == '__main__':    win32serviceutil.HandleCommandLine(Service)