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Hie,

I have a flask server with a React client and I'm using flask_socketio to create a socket and socket.io-client on my React client to connect to it

I'm able to send and receive messages just fine by using the following code on my server: 

message = {"hello": "world"} 

with app.test_request_context('/'): 
    send (message, broadcast=True, namespace="/")

And this code on in my client: 

import io from "socket.io-client" 

let endPoint = "http://localhost:5000"; 
let socket = io.connect (`${endPoint}`);

To connect to the socket and this code to act on messages: 

useEffect(() => {  

    socket.on ("message", msg => {
        console.log (msg); 
    }) 
}, []);

However! When I moved the code sending the messages to another file and then called it like this: (app is a global variable representing my flask app) 

from app import app 

with app.test_request_context('/'): 
    send ({"hello": "world"}, broadcast=True, namespace="/")

The message is no longer received on the client side as before

Any thoughts?

Lior Z
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1 Answers1

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Solution was to import the "app" from main and not from app: 

from __main__ import app

as explained here: Flask socket.io message events in different files

Lior Z
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  • 9
  • 21