Question

我是NodeJs的新手。我正在网上关于如何制作socket.io（聊天应用程序）的教程。我创建了一个脱机工作的简单应用程序，但是为了使它工作，我必须转到命令提示符，进入我的项目并输入：节点服务器：在端口上启动服务器3000。

我想把这个小应用程序放到我的网站上，我做了here

但是当我尝试在聊天框中输入内容时，它不会显示，并且它在控制台中给了我一堆错误。我知道它可能与端口有关。我只是不知道如何在现场网站上运行它。

这是我的服务器端代码：

// Include all of our modules
var express = require('express');

// Set variable "app" = to the 'express' variable
var app = express();

// Set our server variable, and pass in 'app' variable
var server = require('http').createServer(app);

// Include socket.io and listen to the 'server' variable
var io = require('socket.io').listen(server);


// * We are going to have 2 arrays
// One for users, other one for connections
users = [];
connections = [];


// Run the server, and listen to assigned port
server.listen(process.env.PORT || 3000);


console.log('Server running...');


// Create a route, a function is going to take in a "request" and a "response"
app.get('/', function (req, res) {
    res.sendFile(__dirname + '/index.html');
});


// Open a connection with socket.io
io.sockets.on('connection', function(socket) {
    connections.push(socket);
    console.log('Connected: %s sockets connected', connections.length);

    // Write our disconnect, and console.log how many are still connected
    socket.on('disconnect', function (data) {
        connections.splice(connections.indexOf(socket), 1);
        console.log('Disconnected: %s sockets connected', connections.length);
    });


    // Send message
    socket.on('send message', function (data) {
        // emmit a new message event
        io.sockets.emit('new message', {msg: data});
    })

});

这是我的客户端代码：

 <div class="container">
        <div class="row">
            <div class="col-md-4">
                <div class="well">
                    <h4>Online Users</h4>
                    <ul class="list-group" id="users"></ul>
                </div>
            </div>
            <div class="col-md-8">
                <div class="chat" id="chat"></div>

                <form id="messageForm">
                    <div class="form-group">
                        <label>Enter a message</label>
                        <textarea class="form-control" id="message"></textarea>
                        <br />
                        <input type="submit" class="btn btn-primary" value="Send Message">
                    </div>
                </form>

            </div>
        </div>
    </div>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.4.6/socket.io.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>

    <script>
        $(function() {
            var socket = io.connect();
            var $messageForm = $('#messageForm');
            var $message = $('#message');
            var $chat = $('#chat');

            // create a event when form is submitted
            $messageForm.submit(function(e) {
                e.preventDefault();
                socket.emit('send message', $message.val());
                $message.val('');
            });

            socket.on('new message', function(data) {
                $chat.append('<div class="well">'+data.msg+'</div>');
            });
        });
    </script>

Answer 1

当我们省略连接URL

时，

socket.io自动配置其连接

准确地说，我总是将网址传递给io.connect (more info)

var socket = io.connect('http://<website_name>:<port>/');

例如在您的情况下：

var socket = io.connect('http://davidtrushkov.com:3000/');

简单的聊天应用程序不适用于实时网站

1 个答案: