Node.js socket.io with websocket

Question

I'm begginer in Node.js or websocket. I have problem:

My HTML code:

<!DOCTYPE html>
<html>
    <head>
        <title>test</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
        <script>
            "use strict";
            var gniazdo = new WebSocket('ws://localhost:3000');
            gniazdo.onopen = function(){ 
                 console.log('Połączono');
            };
            gniazdo.onmessage = function(m){ 
                console.log(m.data); 
            };
        </script>
    </body>
</html>

My Node.js code:

var io = require('socket.io')(3000);
io.on('connection', function(socket){
    console.log('a user connected');
});

I have error in console:

WebSocket connection to 'ws://localhost:3000/' failed: Connection closed before receiving a handshake response

Help plz :)

Socket.io first tests the connection with long-polling and upgrades to websockets if they are supported. You need to use the socket.io client library. — Ben Fortune
– Ben Fortune, Commented Oct 16, 2014 at 20:30

ldmat · Accepted Answer · 2014-10-16 22:52:13Z

7

Your client is using WebSockets, but Socket.IO has its own protocol (that may be transported over WebSockets, but it can also be transported over other protocols). Change your client to use Socket.IO's own client:

<script src="https://cdn.socket.io/socket.io-1.1.0.js"></script>

<script>

    'use strict';

    var gniazdo = io('ws://localhost:3000');

    gniazdo.on('connect', function () {

        console.log('Połączono');

        gniazdo.on('message', function (m) {
            console.log(m.data);
        });

    });

</script>

edited Oct 16, 2014 at 22:52

answered Oct 16, 2014 at 22:46

ldmat

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