socketio.exceptions.ConnectionError: Unexpected response from server

[AnanyaCS]

1.I have a flask_socketio app which is deployed on heroku. the flask app shows an index.html page when you call the url.

Config for flask app
Flask==2.0.2
gunicorn==20.1.0
eventlet==0.30.2
gevent-websocket==0.10.1
Flask-SocketIO==4.3.1
python-engineio==3.13.2
python-socketio==4.6.0

from flask import Flask, render_template, make_response, redirect
from flask_socketio import SocketIO, send, emit
import os
These are the imports in the flask server

When i access this server deployed to heroku using a html+js app I can access it using cdn in script tag(from any html page basically)

But when i access it from python program I get unexpected response error. Providing full stacktrace here:

Attempting polling connection to https://my-server-raspi.herokuapp.com/socket.io/?transport=polling&EIO=4
Traceback (most recent call last):
File "/home/pi/Desktop/test-project/client.py", line 4, in
sio.connect('https://my-server-raspi.herokuapp.com/')
File "/home/pi/.local/lib/python3.9/site-packages/socketio/client.py", line 282, in connect
six.raise_from(exceptions.ConnectionError(exc.args[0]), None)
File "", line 3, in raise_from
socketio.exceptions.ConnectionError: Unexpected response from server

edit: I had posted it on repo accidentally and miguel suggested keeping the version of python-socketio same but that didnt help as server uses flask_socketio and not python_socketio
Server: flask_socketio
Client: python_socketio

[atomscaler]

Can you post the code of the Python client? It may be that the error is arising there

On Thu, 23 Dec 2021 at 06:01, AnanyaCS ***@***.***> wrote: 1.I have a flask_socketio app which is deployed on heroku. the flask app shows an index.html page when you call the url. Config for flask app Flask==2.0.2 gunicorn==20.1.0 eventlet==0.30.2 gevent-websocket==0.10.1 Flask-SocketIO==4.3.1 python-engineio==3.13.2 python-socketio==4.6.0 from flask import Flask, render_template, make_response, redirect from flask_socketio import SocketIO, send, emit import os These are the imports in the flask server When i access this server deployed to heroku using a html+js app I can access it using cdn in script tag(from any html page basically) But when i access it from python program I get unexpected response error. Providing full stacktrace here: Attempting polling connection to https://my-server-raspi.herokuapp.com/socket.io/?transport=polling&EIO=4 Traceback (most recent call last): File "/home/pi/Desktop/test-project/client.py", line 4, in sio.connect('https://my-server-raspi.herokuapp.com/') File "/home/pi/.local/lib/python3.9/site-packages/socketio/client.py", line 282, in connect six.raise_from(exceptions.ConnectionError(exc.args[0]), None) File "", line 3, in raise_from socketio.exceptions.ConnectionError: Unexpected response from server edit: I had posted it on repo accidentally and miguel suggested keeping the version of python-socketio same but that didnt help as server uses flask_socketio and not python_socketio *Server*: flask_socketio *Client*: python_socketio — Reply to this email directly, view it on GitHub <#836>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AHVT3QZ5BH6GINYBSZRRZC3USK3LPANCNFSM5KUBMFQQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

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[miguelgrinberg]

Make sure you use the same version of python-socketio and python-engineio in the client and server.