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.leave()

Unsubscribe a socket from a room.

sails.sockets.leave(socket, roomName);

Or:

  • sails.sockets.leave(socket, roomName, cb);

Usage

Argument Type Details
1 socket , The socket to be unsubscribed. May be either the incoming socket request (req) or the id of another socket.
2 roomName The name of the room to which the socket will be unsubscribed.
3 cb An optional callback which will be called when the operation is complete on the current server (see notes below for more information), or if fatal errors were encountered. In the case of errors, it will be called with a single argument (err).

Example

In a controller action, unsubscribe the requesting socket from the specified room:

leaveFunRoom: function(req, res) {
  if ( _.isUndefined(req.param('roomName')) ) {
    return res.badRequest('`roomName` is required.');
  }

  if (!req.isSocket) {
    return res.badRequest('This endpoints only supports socket requests.');
  }

  var roomName = req.param('roomName');
  sails.sockets.leave(req, roomName, function(err) {
    if (err) {return res.serverError(err);}
    return res.json({
      message: 'Left a fun room called '+roomName+'!'
    });
  });
}
Additional Examples

More examples of sails.sockets.leave() usage are available here, including unsubscribing other sockets by id, deeper integration with the database, usage within a service, and usage with the async library.

Notes

  • sails.sockets.leave() is more or less equivalent to the functionality of .leave() in Socket.io, but with additional built-in support for multi-server deployments. With recommended production settings, sails.sockets.leave() works as documented no matter what server the code happens to be running on, or the server the target socket is connected to.
  • In a multi-server environment, when calling .leave() with a socket ID argument, the callback function (cb) will be executed when the .leave() call completes on the current server. This does not guarantee that other servers in the cluster have already finished running the operation.
  • Be sure and check req.isSocket === true before passing in req as the socket to be unsubscribed. For that to work, the provided req must be from a socket request, not just any old HTTP request.

Is something missing?

If you notice something we've missed or could be improved on, please follow this link and submit a pull request to the sails-docs repo. Once we merge it, the changes will be reflected on the website the next time it is deployed.

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