get info from client when closing

[Ianyourgod]

Im trying to make a simple multiplayer game with this but I am having a problem figuring out how to tell the server that a person has disconnected. Can anyone help?

[miguelgrinberg]

When a client goes away your disconnect callback is automatically invoked in the server. You can use request.sid within this handler to know which client went away.

[Ianyourgod]

I got AttributeError: 'Request' object has no attribute 'sid'

[miguelgrinberg]

Not possible. Share your code and stack trace please.

[Ianyourgod]

from flask import Flask, render_template, request,redirect
from flask_socketio import SocketIO, send, emit
from time import sleep

app = Flask(__name__)
socketio = SocketIO(app, cors_allowed_origins="*")
temp = ""
temp = []

@app.route("/")
def login():
    return render_template("login.html")

players = {}
sids = {}
@app.route("/game", methods=['POST'])
def game():
    user = request.form['user']
    if user == "":
        return redirect("/")
    try:
        players[user]
        return redirect("/")
    except KeyError:
        pass
    datae = {'name':user}
    players[user] = [0,0]
    sids[request.sid] = user
    return render_template("game.html", data=datae)

def update():
    sendi = []
    for key in players:
        sendi.append(players[key])
    emit('update',sendi, broadcast=True)

@socketio.on("move")
def move(dir, name):
    if dir == "up":
        players[name][1] -= 5
    elif dir == "down":
        players[name][1] += 5
    elif dir == "left":
        players[name][0] -= 5
    else:
        players[name][0] += 5
    # list that will be sent to all of the clients
    update()

@socketio.on('disconnect')
def disconnect():
    name = sids[request.sid]
    del players[name]
    del sids[request.sid]
    update()
    

if __name__ == "__main__":
    app.run(debug=True)

Traceback (most recent call last):
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\app.py", line 2548, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\flask_socketio\__init__.py", line 43, in __call__
    return super(_SocketIOMiddleware, self).__call__(environ,
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\engineio\middleware.py", line 74, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\app.py", line 2528, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\ianlo_btxmkkk\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "c:\Users\ianlo_btxmkkk\cooliostuff\socklet\server.py", line 28, in game
    sids[request.sid] = user
AttributeError: 'Request' object has no attribute 'sid'

[miguelgrinberg]

The error is not in the disconnect handler, it is in your game HTTP handler, which cannot use request.sid because it is not a Socket.IO handler.