The client is using an unsupported version of the Socket.IO or Engine.IO protocols Error
Question:
I’m trying to run a client an server in python using flask_socketio, socketIO_client and SOCKET.IO in a raspberry pi 4 but I’m getting the following error:
The client is using an unsupported version of the Socket.IO or Engine.IO protocols (further occurrences of this error will be logged with level INFO)
192.168.1.80 - - [05/Feb/2021 18:30:41] "GET /socket.io/?EIO=3&transport=polling&t=NTpTT-L HTTP/1.1" 400 219 0.000618
These are my current versions:
pi@raspberrypi:~/Desktop/EDAdataLogger $ npm list socket.io
EDAdataLogger@ /home/pi/Desktop/EDAdataLogger
└── [email protected]
pi@raspberrypi:~/Desktop/EDAdataLogger $ npm list socket.io-client
EDAdataLogger@ /home/pi/Desktop/EDAdataLogger
└── [email protected]
python-engineio==4.0.0
python-socketio==5.0.4
Flask==1.1.2
Flask-Session==0.3.2
Flask-SocketIO==5.0.1
How can I define JavaScript Socket.IO version and Socket.IO protocol revision so everything matches according to (https://pypi.org/project/python-socketio/) ?
How can I fix this? Thank you
Answers:
There appears to be some backward compatibility issues with SocketIO. You can uninstall python-engineio, python-socketio (and Flask-SocketIO just to be on the safe side) and reinstall lower versions.
The combination that worked for me was:
Flask-SocketIO==4.3.1
python-engineio==3.13.2
python-socketio==4.6.0
To fix the version incompatibility, you can run below "upgrade"commands:
pip install --upgrade python-socketio==4.6.0
pip install --upgrade python-engineio==3.13.2
pip install --upgrade Flask-SocketIO==4.3.1
flask-socketio-5.1.2
python-engineio-4.3.2
python-socketio-5.6.0
script src="//cdnjs.cloudflare.com/ajax/libs/socket.io/4.5.0/socket.io.js">
This worked for me. This error is due to dependency related to python-engineio .
After this, check your socket request shows EIO4 like this
"GET /socket.io/?EIO=4&transport=websocket&sid=mJ1g8wm0didssJSiAAAA HTTP/1.1" 200
My fix was to use the socket.io version, not cloudflare as the source
Check for the compatibility between the JS Client version and the Socket.IO server version here: https://socket.io/docs/v4/client-installation/ and accordingly upgrade/downgrade the client/server version.
You will need these modules on the server side:
Flask-SocketIO
python-engineio
python-socketio
You will have this kind of URL in your client:
//cdnjs.cloudflare.com/ajax/libs/socket.io/
One working example, which I’m using:
On Server side:
Flask-SocketIO==5.2.0
python-engineio==4.3.3
python-socketio==5.7.1
simple-websocket==0.7.0
On Client side:
//cdnjs.cloudflare.com/ajax/libs/socket.io/4.2.0/socket.io.js
I’m trying to run a client an server in python using flask_socketio, socketIO_client and SOCKET.IO in a raspberry pi 4 but I’m getting the following error:
The client is using an unsupported version of the Socket.IO or Engine.IO protocols (further occurrences of this error will be logged with level INFO)
192.168.1.80 - - [05/Feb/2021 18:30:41] "GET /socket.io/?EIO=3&transport=polling&t=NTpTT-L HTTP/1.1" 400 219 0.000618
These are my current versions:
pi@raspberrypi:~/Desktop/EDAdataLogger $ npm list socket.io
EDAdataLogger@ /home/pi/Desktop/EDAdataLogger
└── [email protected]
pi@raspberrypi:~/Desktop/EDAdataLogger $ npm list socket.io-client
EDAdataLogger@ /home/pi/Desktop/EDAdataLogger
└── [email protected]
python-engineio==4.0.0
python-socketio==5.0.4
Flask==1.1.2
Flask-Session==0.3.2
Flask-SocketIO==5.0.1
How can I define JavaScript Socket.IO version and Socket.IO protocol revision so everything matches according to (https://pypi.org/project/python-socketio/) ?
How can I fix this? Thank you
There appears to be some backward compatibility issues with SocketIO. You can uninstall python-engineio, python-socketio (and Flask-SocketIO just to be on the safe side) and reinstall lower versions.
The combination that worked for me was:
Flask-SocketIO==4.3.1
python-engineio==3.13.2
python-socketio==4.6.0
To fix the version incompatibility, you can run below "upgrade"commands:
pip install --upgrade python-socketio==4.6.0 pip install --upgrade python-engineio==3.13.2 pip install --upgrade Flask-SocketIO==4.3.1
flask-socketio-5.1.2
python-engineio-4.3.2
python-socketio-5.6.0
script src="//cdnjs.cloudflare.com/ajax/libs/socket.io/4.5.0/socket.io.js">
This worked for me. This error is due to dependency related to python-engineio .
After this, check your socket request shows EIO4 like this
"GET /socket.io/?EIO=4&transport=websocket&sid=mJ1g8wm0didssJSiAAAA HTTP/1.1" 200
My fix was to use the socket.io version, not cloudflare as the source
Check for the compatibility between the JS Client version and the Socket.IO server version here: https://socket.io/docs/v4/client-installation/ and accordingly upgrade/downgrade the client/server version.
You will need these modules on the server side:
Flask-SocketIO
python-engineio
python-socketio
You will have this kind of URL in your client:
//cdnjs.cloudflare.com/ajax/libs/socket.io/
One working example, which I’m using:
On Server side:
Flask-SocketIO==5.2.0
python-engineio==4.3.3
python-socketio==5.7.1
simple-websocket==0.7.0
On Client side:
//cdnjs.cloudflare.com/ajax/libs/socket.io/4.2.0/socket.io.js