expressjs socket.io port 3000已经在使用中

Question

我是否需要为express（3000）和socket.io指定不同的端口？

错误：端口3000已在使用中

我的代码：

index.js

my @cmd = ("-out", $args->{keyfile}, $args->{keysize});
unshift @cmd, ("-des3", "-passout", "fd:3") if defined $args->{keypass};
# ...
my $h = start ["openssl", "genrsa", @cmd], '<', \$in, '>', \$out, '3<', \$args->{keypass};

的index.html

var express = require('express')
,router = express.Router()
  , app = express()
  , http = require('http')
  , server = http.Server(app)
  , io = require('socket.io').listen(server)

server.listen(3000);

router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});


io.on('connection',function(socket){  
    console.log("A user is connected");

    socket.on('point1', function (value) {
        socket.broadcast.emit('point1',value);
    });

    socket.on('less1', function (value) {
        socket.broadcast.emit('less1',value);
    });

    socket.on('point2', function (value) {
        socket.broadcast.emit('point2',value);
    });

    socket.on('less2', function (value) {
        socket.broadcast.emit('less2',value);
    });
});

module.exports = router;

或如何在io.connect上传递变量（“use-host：use-port”）;

来自app.js的index.html或配置文件。