Code which was working on socketio version 4.6.0 is not working now in version 5.0.4

[krishnavelu]

pythons-socketio version 4.6.0 & engineio version 3.13.1
Connects and works perfectly withtout any problem.
Note: Namespace / is connected and no rejection from server side

Version information of socketio & engineio

>pip show python-socketio
Name: python-socketio
Version: 4.6.0
Summary: Socket.IO server
Home-page: http://github.com/miguelgrinberg/python-socketio/
Author: Miguel Grinberg
Author-email: miguelgrinberg50@gmail.com
License: MIT
Location: c:\python38\lib\site-packages
Requires: six, python-engineio
Required-by:

>pip show python-engineio
Name: python-engineio
Version: 3.13.1
Summary: Engine.IO server
Home-page: http://github.com/miguelgrinberg/python-engineio/
Author: Miguel Grinberg
Author-email: miguelgrinberg50@gmail.com
License: MIT
Location: c:\python38\lib\site-packages
Requires: six
Required-by: python-socketio

logging enabled in both library

>python main.py
23:37:40.891.263, client, INFO, Attempting WebSocket connection to wss://ws.upstox.com/socket.io/?  information removed &transport=websocket&EIO=3
23:37:41.931.590, client, INFO, WebSocket connection accepted with {'sid': 'AKfyGHnlpuv_91ZTAJFS', 'upgrades': [], 'pingInterval': 2000, 'pingTimeout': 60000}
23:37:41.931.590, client, INFO, Engine.IO connection established
23:37:41.932.587, client, INFO, Sending packet PING data None
23:37:41.942.563, client, INFO, Received packet MESSAGE data 0
23:37:41.943.559, client, INFO, Namespace / is connected
23:37:42.160.441, client, INFO, Received packet PONG data None
23:37:43.934.515, client, INFO, Sending packet PING data None
23:37:44.163.661, client, INFO, Received packet PONG data None
23:37:45.935.990, client, INFO, Sending packet PING data None
23:37:46.164.545, client, INFO, Received packet PONG data None
23:37:47.936.101, client, INFO, Sending packet PING data None
23:37:48.168.060, client, INFO, Received packet PONG data None
23:37:49.936.557, client, INFO, Sending packet PING data None
23:37:50.165.909, client, INFO, Received packet PONG data None
23:37:51.936.624, client, INFO, Sending packet PING data None
23:37:51.944.657, broker, INFO, Logging in to upstox server
23:37:51.944.657, client, INFO, Emitting event "message" [/]
23:37:51.944.657, client, INFO, Sending packet MESSAGE data 2["message",{"method":"client_login","type":"interactive","data":{"client_id":"","password":""}}]
23:37:52.170.459, client, INFO, Received packet PONG data None
23:37:52.222.219, client, INFO, Received packet MESSAGE data 2["message",{"timestamp":1610734070921,"response_type":"client_login","guid":null,"data":{"success":true,"statusCode":1,"connected_server":"ip-172-31-21-200"}}]
23:37:52.223.191, client, INFO, Received event "message" [/]
23:37:52.223.191, client, INFO, Emitting event "message" [/]
23:37:56.175.874, client, INFO, Received packet PONG data None
23:37:57.939.303, client, INFO, Sending packet PING data None
23:37:58.180.645, client, INFO, Received packet PONG data None
23:37:59.939.735, client, INFO, Sending packet PING data None
23:38:00.166.902, client, INFO, Received packet PONG data None
23:38:01.940.612, client, INFO, Sending packet PING data None
23:38:02.169.766, client, INFO, Received packet PONG data None
23:38:03.940.732, client, INFO, Sending packet PING data None
23:38:04.180.604, client, INFO, Received packet PONG data None
23:38:05.941.043, client, INFO, Sending packet PING data None
23:38:06.169.315, client, INFO, Received packet PONG data None
23:38:07.941.815, client, INFO, Sending packet PING data None
23:38:08.170.819, client, INFO, Received packet PONG data None
23:38:09.942.222, client, INFO, Sending packet PING data None
23:38:10.171.609, client, INFO, Received packet PONG data None
23:38:11.942.829, client, INFO, Sending packet PING data None
23:38:12.172.043, client, INFO, Received packet PONG data None
23:38:13.943.691, client, INFO, Sending packet PING data None

Uninstalled both and installed latest version of both. python-socketio = 5.0.4 python-engineio = 4.0.0

>pip uninstall python-engineio
Found existing installation: python-engineio 3.13.1
Uninstalling python-engineio-3.13.1:
  Would remove:
    c:\python38\lib\site-packages\engineio\*
    c:\python38\lib\site-packages\python_engineio-3.13.1.dist-info\*
Proceed (y/n)? y
  Successfully uninstalled python-engineio-3.13.1

>pip uninstall python-socketio
Found existing installation: python-socketio 4.6.0
Uninstalling python-socketio-4.6.0:
  Would remove:
    c:\python38\lib\site-packages\python_socketio-4.6.0.dist-info\*
    c:\python38\lib\site-packages\socketio\*
Proceed (y/n)? y
  Successfully uninstalled python-socketio-4.6.0

>pip install python-socketio
Collecting python-socketio
  Using cached python_socketio-5.0.4-py2.py3-none-any.whl (52 kB)
Requirement already satisfied: bidict>=0.21.0 in c:\python38\lib\site-packages (from python-socketio) (0.21.2)
Collecting python-engineio>=4
  Using cached python_engineio-4.0.0-py2.py3-none-any.whl (50 kB)
Installing collected packages: python-engineio, python-socketio
Successfully installed python-engineio-4.0.0 python-socketio-5.0.4

Latest library connects, but server sending namespace / was rejected message, eventually leading to BadNamespaceError \ error
python-socketio = 5.0.4 python-engineio = 4.0.0

>python main.py
23:42:35.111.527, client, INFO, Attempting WebSocket connection to wss://ws.upstox.com/socket.io/? Information removed &transport=websocket&EIO=4
23:42:36.158.799, client, INFO, WebSocket connection accepted with {'sid': 'xzIaRZIKYz1BwKKkAJEw', 'upgrades': [], 'pingInterval': 2000, 'pingTimeout': 60000}
23:42:36.158.799, client, INFO, Engine.IO connection established
23:42:36.158.799, client, INFO, Sending packet MESSAGE data 0
23:42:36.184.729, client, INFO, Received packet MESSAGE data 0
23:42:36.185.752, client, INFO, Namespace / is connected
23:42:36.390.209, client, INFO, Received packet MESSAGE data 4"{\"timestamp\":1610734355081,\"response_type\":\"server_error\",\"error\":{\"message\":\"You have not been authorized for this action\",\"statusCode\":500}}"
23:42:36.395.195, client, INFO, Connection to namespace / was rejected
Exception in thread Thread-3:
Traceback (most recent call last):
  File "C:\Python38\lib\threading.py", line 932, in _bootstrap_inner
    self.run()
  File "C:\Python38\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Python38\lib\site-packages\socketio\client.py", line 611, in _handle_eio_message
    self._handle_connect(pkt.namespace, pkt.data)
  File "C:\Python38\lib\site-packages\socketio\client.py", line 485, in _handle_connect
    self._trigger_event('connect', namespace=namespace)
  File "C:\Python38\lib\site-packages\socketio\client.py", line 547, in _trigger_event
    return self.handlers[namespace][event](*args)
  File "D:\projects\PTrade\broker_upstox_hacked\broker.py", line 205, in __login_to_upstox_server
    self.__sio.send(loginJSON)
  File "C:\Python38\lib\site-packages\socketio\client.py", line 364, in send
    self.emit('message', data=data, namespace=namespace,
  File "C:\Python38\lib\site-packages\socketio\client.py", line 328, in emit
    raise exceptions.BadNamespaceError(
socketio.exceptions.BadNamespaceError: / is not a connected namespace.
23:43:36.157.881, client, WARNING, WebSocket connection was closed, aborting
23:43:36.158.879, client, INFO, Waiting for write loop task to end
23:43:36.158.879, client, INFO, Exiting write loop task
23:43:36.160.875, client, INFO, Engine.IO connection dropped
23:43:36.161.870, client, INFO, Exiting read loop task

In both client code is same, server is same only difference is socketio and enginio libraries.

Please let me know what I'm doing wrong or how to tackle this.

[miguelgrinberg]

Did you upgrade your server? The new Socket.IO protocol version is not backwards compatible, if you upgrade the client you have to upgrade the server too.

[krishnavelu]

No, server is not in my control. I only do client side code.

[krishnavelu]

Can you please give me more information about the Socket.IO protocol versions and which version of the library supports which one? So that I can update the library appropriately.

[miguelgrinberg]

https://python-socketio.readthedocs.io/en/latest/intro.html#version-compatibility

[krishnavelu]

Thank you for the information. How do I find out which version the server is using? Is there any way?

[miguelgrinberg]

There are two major variations of Socket.IO currently in use. The new one, represented by the Socket.IO v3 JavaScript reference client and server, and the old one, which is based on the v2 Socket.IO JavaScript.

The v5 of this package maps to the v3 of Socket.IO. If that does not work, then try v4. When you switch versions make sure you also install the correct version of python-engineio. The table shows the correct versions for each.

[krishnavelu]

Thank you

[ericmandel]

@miguelgrinberg I also upgraded gtom 4.6.1 to 5.0.4 and get a very similar namespace error. In my case, the initial connection to the "/" namespace seems to work:

Namespace / is connected

but the first attempt to send a message via socket io results in the error:

socketio.exceptions.BadNamespaceError: / is not a connected namespace.

A full log is appended below. FWIW, at the moment I have both v2 and v3 installed and listening on the server side and distinguish them by using a different socketio_path for v3 from the default (see below). Perhaps use of a non-standard socketio_path might be relevant?

% python3
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 16:52:21) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyjs9
>>> j = pyjs9.JS9()
Attempting polling connection to http://localhost:2718/socket.io-3/?transport=polling&EIO=4
INFO:engineio.client:Attempting polling connection to http://localhost:2718/socket.io-3/?transport=polling&EIO=4
Polling connection accepted with {'sid': 'CLjl8us4Pa7CULPBAAAV', 'upgrades': ['websocket'], 'pingInterval': 25000, 'pingTimeout': 5000}
INFO:engineio.client:Polling connection accepted with {'sid': 'CLjl8us4Pa7CULPBAAAV', 'upgrades': ['websocket'], 'pingInterval': 25000, 'pingTimeout': 5000}
Engine.IO connection established
INFO:socketio.client:Engine.IO connection established
Sending packet MESSAGE data 0
INFO:engineio.client:Sending packet MESSAGE data 0
Attempting WebSocket upgrade to ws://localhost:2718/socket.io-3/?transport=websocket&EIO=4
INFO:engineio.client:Attempting WebSocket upgrade to ws://localhost:2718/socket.io-3/?transport=websocket&EIO=4
WebSocket upgrade was successful
INFO:engineio.client:WebSocket upgrade was successful
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/eric/pyjs9/pyjs9/__init__.py", line 270, in __init__
Received packet MESSAGE data 0{"sid":"SopQAdVyz5fpe0rzAAAW"}
INFO:engineio.client:Received packet MESSAGE data 0{"sid":"SopQAdVyz5fpe0rzAAAW"}
Namespace / is connected
INFO:socketio.client:Namespace / is connected
    self._alive()
  File "/Users/eric/pyjs9/pyjs9/__init__.py", line 284, in _alive
    self.send(None, msg='alive')
  File "/Users/eric/pyjs9/pyjs9/__init__.py", line 334, in send
    self.sockio.emit('msg', obj, callback=self.sockioCB)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/socketio/client.py", line 329, in emit
    namespace + ' is not a connected namespace.')
socketio.exceptions.BadNamespaceError: / is not a connected namespace.

[miguelgrinberg]

@ericmandel See #634

[ericmandel]

@miguelgrinberg Beautiful, thanks! All is well now ...