This websocket connection fails. The funny thing is this was working a couple days ago. I downgraded electron from 6 to 5.0.6 but this didn’t help.
Server
from aiohttp import web
import socketio
app = web.Application()
sio = socketio.AsyncServer()
# or sio = socketio.AsyncServer(cors_allowed_origins='*')
sio.attach(app)
@sio.on('connect')
async def user_connected(sid, arg):
print(sid)
print(arg)
if __name__ == '__main__':
web.run_app(app)
Client (also tested from pure node)
const con = 'http://0.0.0.0:8080';
const socket = require('socket.io-client').connect(con);
socket.on('connect', (e) => console.log(e));
When I try it in the browser, I get cors error. Thus, I allowed cors which made it work
sio = socketio.AsyncServer(cors_allowed_origins='*')
When I run this from electron/node now, I get the same error as initially plus a key error:
Since it was working before, and now it doesn’t on 2 different machines and with a minimal example project, I have no idea what could cause all of this.
Please help me stack people.
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Answer
2021: Note that you can now install again from pypi. You still need to allow cors.
After a chat with Miguel Grinberg on twitter, I found out how to set it up. There are a couple of things. First 4.3 introduced CORS restriction by default. There was a bug with CORS headers from node client, since node is not a browser. That is fixed by now.
However, it is still not enough to simply pip install python-socketio
You have to install the master branch of python-enginio manually as there is the CORS header fix.
My Pipfile looks like this:
[packages]
aiohttp = "*"
aiohttp-cors = "*"
python-enginio = {git = "https://github.com/miguelgrinberg/python-engineio/",ref = "master"}
python-socketio = "*"
Dont forget to allow CORS now serverside.
sio = socketio.AsyncServer(cors_allowed_origins='*')