Added websocket generic listener for port 8081, added a test script for it and updated test_ipv4_connection.py to add websocket events

py-json/ws_generic_monitor.py

@@ -0,0 +1,25 @@
+"""
+pip install websocket_client
+
+https://pypi.org/project/websocket_client/
+
+WS_Listener has three arguments in general : lfclient_host, _scriptname, _callback
+1.  Enter the LF Client Host address on which you want to monitor events (by Default is localhost)
+2.  Enter the _scriptname that should be present in the event triggered by your script,
+    refer add_event() in lfcli_base.add_event()
+    _scriptname can be any string that you want to monitor in your websocket message
+3.  Enter the Callback function that you wanna see your messages in everytime your event will trigger up.
+    refer py-scripts/ws_generic_monitor_test.py to see an example
+
+"""
+
+class WS_Listener():
+    def __init__(self, lfclient_host="localhost", _scriptname=None, _callback=None):
+        import websocket
+        self.scriptname = _scriptname
+        websocket.enableTrace(True)
+        self.ws = websocket.WebSocketApp("ws://"+lfclient_host+":8081", on_message=_callback)
+        self.ws.run_forever()
+
+
+