How to get the socket object in node.js?

Question

I am making an app with node.js(express)+socket.io and I am wondering how I can use the socket object which is the parameter of io.on('connection',function(socket){... from outside like routes files in the routes folder

app.js

app.get('/foo/:id?', routes.foo);

routes/foo.js

exports.index = function(req, res){
  //do something with socket such as socket.join()
};

any ideas or tips would be appreciated.

edited My goal is to let a user who accesses '/foo/:id?' join the socket.io's room(https://github.com/LearnBoost/socket.io/wiki/Rooms) named id?'. So I would like to call socket.join('req.params.id') at

exports.index = function(req, res){
  //HERE
};

You can access the underlying Socket via req.connection. — Joe
– Joe, Commented Apr 8, 2014 at 15:35
@Joe Thanks for commenting.But Socket I'm talking about is the parameter of socket.io's callback.I've peeked what req.connection have though I coudln't see anything related to socket.io in it or am I missing something? — suish
– suish, Commented Apr 9, 2014 at 1:56
req.connection is the Node.js socket object. Not sure what is available for socket.io, sorry. — Joe
– Joe, Commented Apr 9, 2014 at 2:59

muZk · Accepted Answer · 2014-04-16 06:06:05Z

1

+50

You should use express.io

It's really easy to implement and you could do this:

exports.index = function(req, res){
  req.io.join(req.params.id); // The client for the request joins to the room with name req.params.id
};

answered Apr 16, 2014 at 6:06

muZk

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