nodejs socket.io cannot connect to server?

后端未结

关注

 4  1805

I\'ve been staring at node.js and socket.io examples all afternoon and i\'m trying to piece together a simple page that will tell me how many users I have connected to the s

相关标签:

4条回答

执念已碎

2020-12-28 19:53
replace app.use(express.bodyParser());, with
```
app.use(express.json());
app.use(express.urlencoded());
```
...save file, restart node server.
0 讨论(0)
发布评论:

提交评论
- 加载中...
走了就别回头了

2020-12-28 19:54
The problem is because of Express now being a function.

You need to do the following:
```
var express = require('express');
var app = express();
var server = app.listen(3000);

var io = require('socket.io').listen(server);
```
0 讨论(0)
发布评论:

提交评论
- 加载中...
轮回少年

2020-12-28 19:56

Express 3.0.0alpha and socket.io are not (directly) compatible, due to changes in Express between 2.* and 3.* (or rather, changes in Connect between 1.* and 2.*). I would recommend you to downgrade to Express 2.5.9 for the time being, or you can follow this advice from Express' author, TJ Holowaychuk.

0 讨论(0)
发布评论:

提交评论
- 加载中...

星月不相逢

2020-12-28 20:06

I set up a test environment, installed express 3.0 and socket.io 0.9.5, and reproduced your error.

Then I ran npm install express@2.5.1 made a couple backwards tweaks based on the migration guide, and it ran great.

So I'm going to go ahead and suggest that socket.io is probably not compatible with express 3 yet, which still looks pretty unstable.

My app.js tweaked for express 2:

var express = require('express'),
    config = {
    port: 8080,
    hostname: 'localhost'
};

var server = module.exports = express.createServer();
/* server configuration */
server.set('views', __dirname + '/lib/views');
server.set('view options', { layout: false });
server.set('view engine', 'ejs');
//server.register('.html', 'ejs');require('ejs').__express);
server.use(express.cookieParser('keyboard unicorn'));
server.use(express.bodyParser());
server.use(express.methodOverride());
server.use(express.session({ secret: 'keyboard unicorn' }));
server.use('/', express.static(__dirname + '/lib/assets'));
server.use(server.router);

var io = require('socket.io').listen(server);

io.set('log level', 2);

var connections = { 'length': 0 };

server.get('/', function( req, res ) {
        res.render('index', {
                'page_title': 'sample application',
                    'number_of_connections': connections.length
                    });
    });

io.sockets.on('connection', function(socket) {
        socket.__fd = socket.fd;
        connections[socket.__fd]=socket.remoteAddress;
        ++connections.length;
        console.log('user connected! There are a total of ' + connections.length + ' users online.');
        return socket.on('disconnect',function(){
                delete conns[socket.__fd];
                --connections.length;
                console.log('user disconnected! There are a total of ' + connections.length + ' users remaining online.');
            });
    });

server.listen(config.port);

My index.ejs file:

<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="utf-8">
   <title><%= page_title %></title>
</head>
<body>
<div>There is a total of <%= number_of_connections %> user(s) connected.</div>
<!--<script src="http://cdn.socket.io/stable/socket.io.js"></script>-->
<script src='/socket.io/socket.io.js'></script>
<script type="text/javascript">
   var socket = io.connect('http://hostname.com:8080');
   socket.on('connect', function() {
      console.log('connected');
   });
</script>
</body>
</html>

I hope something here helps.

0 讨论(0)