Using the following simple application of socket.io, I get very strange behaviour, but only on some computers I tested. On most computers, it seems to work fine. This is the setup I used:
server.js:
var app = require('http').createServer(handler)
, io = require('socket.io').listen(app)
, fs = require('fs')
app.listen(80);
function handler (req, res) {
fs.readFile(__dirname + '/index.html',
function (err, data) {
if (err) {
res.writeHead(500);
return res.end('Error loading index.html');
}
res.writeHead(200);
res.end(data);
});
}
io.sockets.on('connection', function (socket) {
i = 0;
setInterval(function() {
socket.emit('news', 'test');
}, 200);
socket.on('my other event', function (data) {
console.log(data);
});
});
index.html:
<html>
<script src="/socket.io/socket.io.js"></script>
<script>
var socket = io.connect();
socket.on('news', function (data) {;
console.log("test");
socket.emit('my other event', { my: 'data' });
});
</script>
</html>
<body></body>
If I set the interval on 30 instead of 200 milliseconds, it seems to work well (i.e. the client and server both receive the socket messages on time), but when I set the interval on 100 or more milliseconds, the client does not respond to the first 13 (consequently 13) messages sent by the server and then suddenly receives all 13 messages at once, directly followed by this error:
"WebSocket connection to 'ws://example.com/socket.io/1/websocket/63zOWQ5mEuzV01WuqZ5X' failed: Unrecognized frame opcode: 11".
This behaviour repeats for some time, so sets of 13 messages are suddenly received followed by the error, but sometimes, after a random amount of error sets, it starts behaving normally again. I know this sounds really weird, but I can't find the source of this problem and it greatly affects the user experience. What could trigger this problem?
I am using node.js version 0.8.24, socket.io 0.9.14 and chrome version 31.0.1650.63 m. I am running on CentOS version 6.5. This behaviour also happens on IE 10 with a different error: "SCRIPT12152: WebSocket Error: Network Error 12152"
