Using socket.io in routes

Question

I use socket.io between my angular app and my server without any trouble but I don't know how to do it when it comes to use socket.io in my routes.

Here is what i did so far :

app.js

var server = app.listen(port);
var io = require('socket.io').listen(server);
io.sockets.on('connection', function (socket) {
socket.on('server',function(data){
    log.info(data.message);
});
socket.on('console',function(data){
    log.info(data.message);
});
socket.emit('client',{action:"test"});
});

as i said , it works.

Now i want to use socket.io in one of my routes , routes loaded from my router :

require('./app/my.routes')(app,io);//i've tried to use it this way

my.routes.js

module.exports = function (app,io){ 
    io = app.get('io');//and get it this way
    io.sockets.emit('socket.io :: sucessfully passed from app to router')
    log.info('Trying to load express routes...');
    router.use(function (req, res, next) {
        next(); // make sure we go to the next routes and don't stop here
    });
    require('./models.mongoose/user');
    //require routes
    var consoleRoute = require('./express.routes/console.route')
   ...

and now I have that error

io.sockets.emit('socket.io :: sucessfully passed from app to router')
  ^

TypeError: Cannot read property 'sockets' of undefined

I must do something wrong obviously but I have no idea what. Any ideas ?

I also tried app.set('io',io) in app.js and app.get('io') on the other side but it failed all the same

SOLUTION

Finally , i've found the solution,

app.io = io.sockets.on('connection', function (socket) {
socket.on('server', function (data) {
    log.info(data);
});
socket.emit('client', {
    action: "alert",
    text: 'test from socket io'
  });
});;

Now it's linked to app, and I can use it anywhere.

Answer 1

You can setup your socket io implementation in your express configuration file and pass your "io" object as a variable within the app.

app.io = io;

the idea is to do something like this:

module.exports = function (app){ 
    app.io.sockets.emit('socket.io sucessfully passed from app to router');
}