CODEWITHSUNDEEP
pythonsessionflasksocket.ioflask-socketio
user2699190
user2699190

Reputation: 27

flask socketio session query string

this code is supposed to work, but it does not work

As soon as a client connects, the session 'keyo' is assigned to the value 'example'

I tried to make an equivalent of socket.myvariable with session['myvariable']

@app.route("/a")
def helljo():
    return render_template('index.html')

@socketio.on('connect')
def handleMessagae():
    session['keyo'] = request.args.get('session') # /a?session=example
    emit('connected', session.get('keyo'))

@socketio.on('message')
def handleMessage(message):
    emit('message', {'pseudo':session.get('keyo'),'message':message} , broadcast=True, include_self=False)

Upvotes: 2

Views: 3167

Answers (4)

user2699190
user2699190

Reputation: 27

The Alternative Solution :

@app.route("/a", methods=['GET'])
def index():
    resp = request.args.get('session')
    return render_template( 'index.html' , resp=resp )

@socketio.on('My_Event')
def message(msg):
    print(msg)

on index.html

 <script>
      // ...
    {% if resp %}
    variable = '{{ resp }}';
    {% else %}
    variable = 'null';
    {% endif %}

      socket.emit( 'My_Event' , variable );
    // ...
    </script>

Upvotes: 0

Miguel Grinberg
Miguel Grinberg

Reputation: 67489

The correct way to do what you want is:

@app.route("/a")
def helljo():
    session['keyo'] = request.args.get('session') # /a?session=example
    return render_template('index.html')

@socketio.on('connect')
def handleMessagae():
    emit('connected', session.get('keyo'))

@socketio.on('message')
def handleMessage(message):
    emit('message', {'pseudo':session.get('keyo'),'message':message} , broadcast=True, include_self=False)

The problem is that you are mixing up the HTTP request with the Socket.IO requests. If you invoke the /a endpoint with some query string args, you can only access those arguments in the handler for that endpoint. But saving them in the session makes them accessible later by the Socket.IO event handlers.

Upvotes: 1

user2699190
user2699190

Reputation: 27

the fourth line of this code sends to all clients except to sender of the request. I would like to send it only to sender

@app.route("/a", methods=['GET'])
def helljo():
    session['keyo'] = request.args.get('session')
    socketio.emit('alert_sender', {'resp': session.get('keyo')})
    return render_template('index.html')

@socketio.on('connect')
def handleMessagae():
    emit('connected', 'hi')

@socketio.on('message')
def handleMessage(message):
    emit('message', {'pseudo':session.get('keyo'),'message':message} , broadcast=True, include_self=False)

on index.html (when I go on /a?session=example)

...
 socket.on('alert_sender', function(data) {
  alert(data.resp);      
 // others receive alert : example    sender receive : nothing
});
...

Upvotes: 0

user5201343
user5201343

Reputation: 

@app.route("/a", methods=['GET'])
def helljo():
    session['keyo'] = request.args.get('session')
    socketio.emit('EVENT', {'var': session.get('keyo')})
    return render_template('index.html')

@socketio.on('connect')
def handleMessagae():
    emit('connected', session.get('keyo'))

@socketio.on('message')
def handleMessage(message):
    emit('message', {'pseudo':session.get('keyo'),'message':message} , broadcast=True, include_self=False)

The problem here is, that you're trying to get request arguments within a socketio event, this isn't going to work as request arguments are only accessible inside of an @app.route() function.

Upvotes: 0

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