Flask-SocketIO session dont sharing between http and websocket behind spring cloud gateway redirect

[GMoraesGarcia]

I have a simple endpoint redirection in spring cloud gateway, to my flask service, when i access this flask app by gateway, the session between http and websocket is not sync, and when i access direct my flask app works normaly, i using redis session.

My configuration:
app.config['SECRET_KEY'] = 'secret!'
app.config["SESSION_PERMANENT"] = False
app.config["SESSION_TYPE"] = "redis"
app.config['SESSION_USE_SIGNER'] = True
app.config['SESSION_REDIS'] = redis.from_url('redis://{HOST_REDIS}:6379')
Session(app)
CORS(app, resources={r"/": {"origins":""}})
socketio = SocketIO(app, cors_allowed_origins="*", manage_session=True, engineio_logger=True)

endpoint that the gateway does the redirection:
@app.route("/flask-mvp", methods=['GET'])
def print_hi():
header = request.headers
bearer_token = TOKEN #header.get("Authorization").split(" ")[1]
content = decoder(bearer_token)
user_id = content['sub']
user_name = content['name']
user_email = content['email']
session['user_infs'] = {
"user_name": user_name,
"user_email": user_email,
"user_id": user_id
}
logging.critical(session['user_infs']['user_id'])
return render_template('mvp-front-session.html',
user_id=user_id,
user_name=user_name,
user_email=user_email,
)

websocket topic when i consume session infs:

@socketio.on('sendOther')
def other_impl_teste(msg):
rabbit_conn = pika.BlockingConnection(pika.ConnectionParameters(RABBITMQ_HOST))
channel = rabbit_conn.channel()
queue_callback = "callback_other_" + session['user_infs']['user_id']
data = {
"message": msg,
"queue_callback": queue_callback
}
channel.queue_declare(queue=queue_callback)
channel.basic_publish(
exchange='',
routing_key=queue_callback,
body=json.dumps(data)
)
channel.close()
emit('getOther', 'Deploing Other...')
time.sleep(20)
sub_rabbit(queue_callback)

[miguelgrinberg]

Unfortunately I cannot help with this, as I'm not familiar with the cloud service that you are using. You need to ensure that the session cookie is always passed on to the Flask app. It must be missing in your WebSocket requests.

[GMoraesGarcia]

Tanks for you answer, spring cloud gateway is kind of Kong ou other regular API gateway, what i do is Just redirect to my flask app, info the flask app i configure Sessions and websocket, but like i said, deploing the flask app alone Works normaly, but using this redirection, http Sessions Works but not Sync with websocket.

[miguelgrinberg]

As I said above, I don't think I can help with this. The problem is that either your proxy server does not support websocket, or that it does not forward the session cookie for websocket requests. The best course of action is that you ask your cloud provider about this.