Socket.io not connecting to local host server

Asked Sep 12 '19 at 11:40

Active Dec 27 '22 at 03:11

Viewed 265 times

I am doing everything as per this to connect localhost to app using socket.io .

but it is not connecting, i have connected my phone and laptop to my phone's network. I don't know where i am going in wrong direction. Please guide me.

I have this node server :

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


var con = mysql.createConnection({
    host: "localhost",
    port : "3306",
    user: "root",
    password: "",
    database: "socket_database",
    charset : 'utf8mb4_bin',
    multipleStatements: true
});

app.use(express.static('public'));

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

io.on('connection', function(socket){
    let sender = socket.handshake.query.user_id;
    console.log('a user connected with id - '+ sender);

.
.
.

}

http.listen(3000, function(){
    console.log('listening on *:3000');
})

Android Side Code :

private var mSocket: Socket? = null


    override fun onCreate() {
        super.onCreate()

        try {

            mSocket = IO.socket("http://192.168.40.28:3000")

            mSocket?.on(Socket.EVENT_CONNECT, Emitter.Listener {
                Log.d("TAG", "Socket Connected!")

            })
        } catch (e: Exception) {
            println(e.localizedMessage)
        }
    }

asked Sep 12 '19 at 11:40

zephyr

`http://192.168.40.28:3000` is it your laptop IP or your mobile device? – iamkdblue Sep 12 '19 at 11:44
I have connected my mobile's network to laptop via hotspot. and ip i have fetched form laptop settings -> Wifi -> My phone's network -> IP Setting and Properties – zephyr Sep 12 '19 at 11:54
and if i run ipconfig in cmd, i am getting same ip address, @kdblue – zephyr Sep 12 '19 at 11:55
did you hit this IP in your pc? – iamkdblue Sep 12 '19 at 12:55
@kdblue, means ? – zephyr Sep 12 '19 at 13:30
did you hit this ip http://192.168.40.28:3000? in your pc ! – iamkdblue Sep 12 '19 at 14:03
@kdblue, i have pinged it in cmd. if that is what you mean by hit... – zephyr Sep 13 '19 at 05:24
i mean in your browser – iamkdblue Sep 13 '19 at 08:25
https://stackoverflow.com/a/47125117/6925888 , see this maybe its help you! – iamkdblue Sep 13 '19 at 08:29
@kdblue, yeah , i have done it and it runs my index.html – zephyr Sep 13 '19 at 08:38
do you get any error in the android side? check the logcat! – iamkdblue Sep 13 '19 at 08:55
@kdblue no, not getting any error , that's why i can not detect the problem – zephyr Sep 13 '19 at 09:30
then debug the app ! – iamkdblue Sep 13 '19 at 10:11
@kdblue already done it. it does not go in error block. just when you debug it shows socket.connection() to false. no any other information. and that's frustrating... – zephyr Sep 13 '19 at 10:15
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/199417/discussion-between-kdblue-and-zephyr). – iamkdblue Sep 13 '19 at 10:17

Socket.io not connecting to local host server

0 Answers0