今天给聊天程序升个级 

局域网 多台机器 使用inde.html  发送消息 并显示 （就是群聊） 带着IP

socket.io 获得客户端IP 返回值是::ffff:IP 需要处理一下 用js replace('::ffff:', ''); 处理一下 完事

if(socket.handshake.headers['x-forwarded-for'] != null){
        ip = socket.handshake.headers['x-forwarded-for'];
    }else{
        ip = socket.handshake.address;
    }

nodejs

var http = require('http');//http模块加载
var fs = require('fs');//文件模块加载
var url=require("url");
 
var server = http.createServer(function(request,response)
{
    if(url.parse(request.url).path=='/favicon.ico')
    return;
    fs.readFile(__dirname+'/index.html',function(err,data)
    {
        if(err)
        {
            console.log(err);
        }else
        {
            response.writeHead(200, {'Content-Type': 'text/plain;charset=UTF8'});
            response.write(data);
            response.end();
        }
    });
}).listen(8888);
//实例化上面的链接 server
var io = require('socket.io')(server);
io.on('connection',function(socket)
{
    var ip='';
    // socket.on('sendMessage',function(data)
    // {

    // })
    if(socket.handshake.headers['x-forwarded-for'] != null){
        ip = socket.handshake.headers['x-forwarded-for'];
    }else{
        ip = socket.handshake.address;
    }
    socket.on('sendMessage', (data) => {
        data.id = socket.id;

        data.msg= ip+':' +data.msg;
        data.msg = data.msg.replace('::ffff:', '');
        console.log(data.msg);
        //调用客户端事件
        io.emit('receiveMessage', data);
    })
}
);

HTML

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>群聊</title>
</head>
<body>
<h1>群聊</h1>
<div style="width: 30%; float: left">
    输入:<input type="text" id="msginput">
    <button id="msgbtn">发送</button>
</div>
<div style="width: 65%; float: right" id="showbox">
 
</div>
</body>
<script src="http://Nodejs服务IP:端口号/socket.io/socket.io.js">
// 这个script标签访问数据就相当访问了127.0.0.1:3000/socket.io/socket.io.js,浏览器打开其实就是socket.io插件源码
</script>
<script>
    let socket = io.connect('http://Nodejs服务IP:端口号');
    let btn = document.getElementById('msgbtn');
    let msginput = document.getElementById('msginput');
    let showbox = document.getElementById('showbox');
    btn.addEventListener('click', (event) => {
        let msg = msginput.value;
        let data = {msg: msg};
        //服务器声明好的事件
        socket.emit('sendMessage', data);
    });
    //服务器socket 调用的receiveMessage事件
    socket.on('receiveMessage', (data) => {
        console.log('收到');
        console.log(data);
        
        let message = document.createElement('div');
        message.innerHTML = `${data.msg}`;
        showbox.appendChild(message);
    });
</script>
 
</html>

Nodejs（socket.io获得访问IP）_html

隐藏一下IP 虽然不知道会怎么样 但是还是涂上的好

Nodejs（socket.io获得访问IP）_服务器_02