def createWebsocketInterface(appcfg):
address = keyChainValue(appcfg, 'view_server', 'address')
port = keyChainValue(appcfg, 'view_server', 'port')
sockopt = ((socket.IPPROTO_TCP, socket.TCP_NODELAY, 1),)
ws_url = "ws://{0}:{1}/data_websocket".format(address, port)
ui_server_websocket = create_connection(ws_url, None, sockopt=sockopt)
ui_server_websocket.settimeout(0)
# Inform feedback webserver of experiment directory list
avail_exp_list = DataCollectionRuntime.getActiveExperimentNames(
appcfg.get("experiment_inactive_token"))
msg_type = 'EXP_FOLDER_LIST'
ui_server_websocket.send(ujson.encode([{'msg_type': msg_type,
'data': avail_exp_list}, ]))
msg_type = 'DATA_COLLECT_CONFIG'
ui_server_websocket.send(ujson.encode([{'msg_type': msg_type,
'data': appcfg}, ]))
return ui_server_websocket
