flask socketio emit to specific user

by

I’m not sure I understand the logic behind emitting to the first client, but anyway, this is how to do it:

clients = []

@socketio.on('joined', namespace="/chat")
def joined(message):
    """Sent by clients when they enter a room.
    A status message is broadcast to all people in the room."""
    # Add client to client list
    clients.append(request.sid)

    room = session.get('room')
    join_room(room)

    # emit to the first client that joined the room
    emit('status', {'msg': session.get('name') + ' has entered the room.'}, room=clients[0])

As you can see, each client has a room for itself. The name of that room is the Socket.IO session id, which you can get as request.sid when you are handling an event from that client. So all you need to do is store this sid value for all your clients, and then use the desired one as room name in the emit call.

More Related Contents:

  1. Refering to a directory in a Flask app doesn’t work unless the path is absolute
  2. Get a variable from the URL in a Flask route
  3. Add a prefix to all Flask routes
  4. Post values from an HTML form and access them in a Flask view
  5. Get IP address of visitors using Flask for Python
  6. How to stop flask application without using ctrl-c
  7. How to stop Flask from initialising twice in Debug Mode? [duplicate]
  8. What is the g object in this Flask code?
  9. Application not picking up .css file (flask/python) [duplicate]
  10. Flask-SQLAlchemy import/context issue
  11. Trailing slash triggers 404 in Flask path rule
  12. Run code after flask application has started
  13. How to divide flask app into multiple py files?
  14. When should Flask.g be used?
  15. Python: How to show matplotlib in flask [duplicate]
  16. Configure Flask-Mail to use GMail
  17. Flask CLI throws ‘OSError: [Errno 8] Exec format error’ when run through docker-compose
  18. Form validation fails due missing CSRF
  19. Upload image in Flask
  20. Test if Flask response is JSON
  21. Does Flask support regular expressions in its URL routing?
  22. Serve static files from a CDN rather than Flask in production
  23. How to generate an html directory list using Python
  24. Can’t connect to Flask web service, connection refused
  25. “TypeError”: ‘list’ object is not callable flask
  26. creating a database outside the application context
  27. flask does not see change in .js file
  28. SQLAlchemy ordering by count on a many to many relationship
  29. How do I run a long-running job in the background in Python
  30. ModuleNotFoundError: No module named ‘MySQLdb’

Leave a Comment