SocketIO signal issue

[w8eight]

Hi,

I am trying to run some application using python-socketio as Windows Service and while executing this line into cmd: 'python myapplication.py start' I am getting following error.

File "C:\Users\w23209\Documents\Subversion\Webservice\Digital Factory Web Service\src\frontend\server.py", line 14, in <module> from socketio.server import Server File "C:\Users\w23209\Documents\Subversion\Webservice\venv\Lib\site-packages\socketio\__init__.py", line 3, in <module> from .client import Client File "C:\Users\w23209\Documents\Subversion\Webservice\venv\Lib\site-packages\socketio\client.py", line 6, in <module> import engineio File "C:\Users\w23209\Documents\Subversion\Webservice\venv\Lib\site-packages\engineio\__init__.py", line 3, in <module> from .client import Client File "C:\Users\w23209\Documents\Subversion\Webservice\venv\Lib\site-packages\engineio\client.py", line 49, in <module> original_signal_handler = signal.signal(signal.SIGINT, signal_handler) File "C:\Program Files\Python37\Lib\signal.py", line 47, in signal handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler)) ValueError: signal only works in main thread %2: %3

Any idea what can cause such error?

Python 3.7.4, running from virtualenv

[miguelgrinberg]

What webserver are you using? Can you show me the code that runs as a response of the start argument passed into your script?

[w8eight]

What webserver are you using? Can you show me the code that runs as a response of the start argument passed into your script?

I am using pywin32 hadnle 'start':
win32serviceutil.HandleCommandLine(MyService)
MyService is class inheriting from 'win32serviceutil.ServiceFramework'

Inside Myservice class SvcDoRun function starts actual server.

And this is server class

import bottle
from socketio.server import Server

class GeventSocketIOServer(bottle.ServerAdapter):
    def run(self, handler):
        address = (self.host, self.port)
        self.srv = Server(address, handler, **self.options)
        try:
            log.debug('serve forever')
            self.srv.serve_forever()
            log.debug('stopped serve forever')
        except KeyboardInterrupt:
            self.srv.close()
            raise

Resolving issue is no longer needed for me because I used pywsgi gevent server instead.

[miguelgrinberg]

Thanks. I've written miguelgrinberg/python-engineio#147 to keep track of this issue, so I'll close this one here.