nodejs与websocket模拟简单的聊天室
server.js
const http = require('http')
const fs = require('fs')
var userip
var server = http.createServer((req,res)=>{
res.writeHead(200,{'Content-Type':'text/html;charset=utf8'})
res.end(fs.readFileSync('./index.html'))
userip = req.connection.remoteAddress
userip = userip.replace('10.9.166.','')
})
//socket
const Server = require('ws').Server
//建立好了服务端
var wss = new Server({server})
//存放前端连接的socket
var clientMap = {}
var count = 0
var id = 0
//当客户端连接上的就会触发，回调会接收一个socket对象
wss.on("connection",function (socket) {
count++
id++
socket.id = id
clientMap[socket.id] = socket
socket.nickname = '好友'
console.log(`现在有${count}人连接了`)
broadClients(socket.nickname,1)
//当这个客户端发送数据的时候会触发
socket.on("message",function (msg) {
//console.log(`客户端${socket.id} 说：${msg}`)
let info = JSON.parse(msg)
if(socket.nickname!=info.nickname){
socket.nickname = info.nickname
broadClients()
}
socket.nickname = info.nickname
broadcast(socket,info.msg)
})
//当客户端断开的时候触发
socket.on("close",function () {
//console.log(`客户端${socket.id} 说：${msg}`)
count--
let nickname = socket.nickname
delete clientMap[socket.id]
broadClients(nickname,2)
})
//当客户端连接出错的时候
socket.on("error",function (err) {
console.log(err)
})
})
//广播函数，像所有的客户端发送某一个客户端说的话
function broadcast(socket,msg) {
let info = {nickname:socket.nickname+userip,msg:msg,type:'msg'}
for(var id in clientMap){
info.isMe = socket.id==id?'true':false
clientMap[id].send(JSON.stringify(info))
}
}
function broadClients(nickname,type) {
let clients = []
for(var id in clientMap){
clients.push(clientMap[id].nickname)
}
for(var id in clientMap){
clientMap[id].send(JSON.stringify({
count,clients,
type:'count',
nickname:nickname+userip,
_type:type
}))
}
}
server.listen(2000,'10.9.166.56')
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>wechat</title>
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
</head>
<style>
html,body{
height: 100%;
display: flex;justify-content: center;align-items: center;
}
#room{
width: 600px;
height: 600px;
position: relative;
}
#room .panel-body{
padding: 0;
}
#room .content{
height: 460px;overflow-y: auto;
padding: 10px;
background: #fff;
}
#room .control-box{
height: 90px;
padding: 10px;
display: flex;
flex-wrap: nowrap;
align-items: center;
}
#room .control-box .btn{
margin: 0px 15px;
}
.list-group-item{
border: none;
}
.list-group-item.other span:after{
content: ':';
display: inline-block;
margin: 0px 3px;
}
.list-group-item.me span:before{
content: ':';
display: inline-block;
margin: 0px 3px;
}
.list-group-item.me{
display: flex;
align-items: center;
flex-direction: row-reverse;
}
.numbers{
position: absolute;
width: 150px;
top:0;left: -150px;
}
.numbers .online,.numbers .clients{
width: 80%;
margin-left: 10%;
}
.numbers .clients{
margin-top: 15px;
height: 400px;
overflow: auto;
}
.p-info{
font-size: 12px;
color: rgb(172, 170, 170);
}
</style>
<body>
<div id="room" class="panel panel-primary">
<div class="panel-heading clearfix">
wechat
<input id="nickname" placeholder="昵称，默认为好友" style="width:200px;" type="text" class="form-control pull-right">
</div>
<div class="panel-body">
<div class="content">
<ul class="list-group msgs"></ul>
</div>
<div class="control-box">
<input id="word" type="text" class="form-control">
<button id="send" class="btn btn-success">发送</button>
</div>
</div>
<div class="numbers">
<button class="btn btn-info online">
在线人数：<span class="count"></span>
</button>
<ul class="list-group clients">
</ul>
</div>
</div>
</body>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
<script>
//创建客户端的连接socket
var wsc = new WebSocket('ws://10.9.166.56:2000');
wsc.onopen = function (e) {//当客户端连接上的时候就会触发
//console.log('我已经连接上服务端了')
};
wsc.onmessage = function (e) {//当服务端返回消息的时候触发
// console.log(e.data);
let info = JSON.parse(e.data)
switch(info.type){
case 'msg':
handleMsg(info);break;
case 'count':
handleCount(info);break;
}
};
function handleMsg(info) {
let str = `
<li class="list-group-item ${info.isMe?'me':'other'}">
<span>${info.nickname}</span>
<button class="btn btn-success">${info.msg}</button>
</li>
`
let li = $(str)
$(".msgs").append(li)
li[0].scrollIntoView()
word.value = ''
}
function handleCount(info) {
$(".count").html(info.count)
var str = ''
info.clients.forEach(item => {
str+='<li class="list-group-item list-group-item-info text-center">'+item+'</li>'
});
$(".clients").html(str)
//如果有人来或者有人走，需要报一个消息
if(info.nickname&&info._type){
$(".msgs").append('<p class="p-info text-center">'+info.nickname+(info._type==1?'加入群聊':'离开群聊')+'</p>')
}
}
$("#send").click(function () {
send()
})
$("#word").keyup(function (e) {
if(e.keyCode==13){
send()
}
})
function send() {
var nickname = $("#nickname").val() || '好友'
var msg = $("#word").val()
var reg = /<[^>]+>/g
if(msg!=''){
if(!reg.test(msg)&&!reg.test(nickname)){
wsc.send(JSON.stringify({nickname:nickname,msg:msg}))
}else{
alert('输入框内请勿输入非法字符')
}
}else{
alert('发送内容不能为空，请重新输入')
}
}
var canUse = true
wsc.onclose = function (e) {//当服务端关闭的时候触发
// alert('聊天服务已经关闭了')
canUse = false
};
wsc.onerror = function (e) {//错误情况触发
console.log(e)
}
</script>
</html>
在终端中输入node server即可运行服务器，在浏览器输入你的IP地址+端口号
这里我的ip地址是10.9.166.56，端口号是2000，改成你的ip地址，即可开始运行，赶紧运行，和你的朋友聊起来吧