io.sockets.socket(socket_id).emit() - has no method 'socket'

Question

im running a nodejs server + express + socket.io version 1.0.4 and everything works as expected in my app, but i just cant emit a message from server side to client side via:

socket_server.sockets.socket(socket_id).emit("message", data);

when i try server throws following error:

    TypeError: Object #<Namespace> has no method 'socket'

but i can remember that code worked on my socket.io 0.7./0.8. projects

What am i doing wrong? :(

a snippet out of my app.js (nodejs server):

    var express = require('express');
var app = express();

/* Server Start */
var server = app.listen(8080, function() {
    console.log('Listening on port %d', server.address().port);
});

app.set("view options", {
    layout: false
});
app.use(express.static(__dirname + '/public'));

app.get('/', function(req, res) {
    res.render('index.html');
});

var socket_server = require('socket.io').listen(server);
socket_server.sockets.on('connection', function(client) {
// fire my emits here like: socket_server.sockets.socket(socket_id).emit("msg", data);
}

Why are you using socket_server.sockets.socket(socket_id) instead of the way given in demo. If this is the code for old version, it maynot work with 1.0. Try refractoring your code for newer version. — user568109, Jun 14 '14 at 17:43
which way is given in demo for emitting to one specific socket? — Mafu, Jun 14 '14 at 19:08

Tony Chen · Accepted Answer · 2014-06-17T01:41:19.747

6

In 1.0 you should use:

io.sockets.connected[socketid].emit();

to emit to a specific client.

socket_server.sockets.socket(socket_id).emit();

has been replaced in socket.io 1.0.

edited Jun 17 '14 at 01:41

answered Jun 16 '14 at 01:58

Tony Chen

501
4
16

score 5 · Answer 2 · answered Jun 27 '16 at 07:56

In version >= 1.0 you should use:

io.to(socket.id).emit();

where socket.id is the id as string. The solution was found by victorwoo in following thread https://github.com/socketio/socket.io/issues/1618

Note: The solution describe above by Tony Chen

io.sockets.connected[socketid].emit();

didn't worked for me, since io.sockets.connected is an array of socket objects and not string (id)

score 0 · Answer 3 · answered Jun 14 '14 at 19:01

Change your last part of code to:

var io = require('socket.io').listen(server);
io.on('connection', function(socket) {
    socket.emit('msg',data);
    //to only that client
    io.sockets.emit('msg',data);
    //to all sockets.
}

io is your socket_server. And you listen for connections to it, not to its sockets.

score 0 · Answer 4 · answered Aug 15 '17 at 13:26

in 1.x version, u can find in docs a list of migration tips from oldest version, especifically

Broadcasting to all clients in default namespace

Previously:

io.sockets.emit('eventname', 'eventdata');

Now:

io.emit('eventname', 'eventdata');

red the docs here

io.sockets.socket(socket_id).emit() - has no method 'socket'

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