fix: respect write_only

socketio/uwsgi_manager.py

@@ -24,7 +24,6 @@ class UWSGIManager(PubSubManager):  # pragma: no cover
         server = socketio.Server(client_manager=socketio.UWSGIManager())
 
     Notes:
-        - uWSGI signal must be registered when app is starting.
         - ``uwsgi.signal_wait()`` not working in async mode but
           when fixed it will be a better approach for the listen part.
         - uWSGI does not provide a blocking queue, the workaround is to use the
@@ -45,7 +44,6 @@ class UWSGIManager(PubSubManager):  # pragma: no cover
         self._check_configuration()
         self.signum = self._sig_number(url)
         self.queue = Queue()
-        uwsgi.register_signal(self.signum, 'workers', self._enqueue)
         super(UWSGIManager, self).__init__(channel=channel,
                                            write_only=write_only,
                                            logger=logger)
@@ -80,6 +78,7 @@ class UWSGIManager(PubSubManager):  # pragma: no cover
         self.queue.put(uwsgi.queue_last())
 
     def _uwsgi_listen(self):
+        uwsgi.register_signal(self.signum, 'workers', self._enqueue)
         for message in iter(self.queue.get, None):
             if message is not None:
                 yield message