Socket.io specifying heartbeat

Question

I can\'t seem to find out how to set the heartbeat options for socket.io? I\'d love to be able to specify what happens when a \"timemout\" happens, and when the server hasn\

Answer 1

Socket.IO uses engine.io, which allows you to specify ping interval and ping timeout, like so:

var app = require('express')();
var http = require('http').Server(app);

var io = require('socket.io')(http, {'pingInterval': 2000, 'pingTimeout': 5000});

(2 second interval and 5 second timeout is just an example. It might be to frequent for your use case)

Answer 2

For me the following worked:

var app = express(); 
var server = require('http').createServer(app); 
var io = require('socket.io')(server); 

io.set('heartbeat timeout', 4000); 
io.set('heartbeat interval', 2000);

For package dependency versions:

"express": "^4.12.3",
"socket.io": "1.0"