Vue+Nodejs uses WebSocket to create a simple chat room

1. Page effect

2. Architecture process

Use vue to write front-end pages, nodejs to process server-side messages, and WebSocket for real-time communication.

3. Technical details

1.Client

<template>
    <div>
        <form onsubmit="return false">
            <textarea  id="responseTest"  style="width: 500px; height: 300px"  ></textarea>
            <br />
            <input  type="text"  name="message"  style="width: 300px"  :value="inputVal"  @input="input"  />
            <input type="button" value="发送消息" @click="send(inputVal)" />
            <input type="button" value="清空聊天记录" @click="clean" />
        </form>
    </div>
</template>

<script>
export default {
    
    
    data() {
    
    
        return {
    
    
          inputVal: '欢迎来到二二得四的聊天室',
          socket:null
        }
    },
    methods: {
    
    
        testWebsocket() {
    
    
            if (!window.WebSocket) {
    
    
                window.WebSocket = window.MozWebSocket
            }
            if (window.WebSocket) {
    
    
                this.socket = new WebSocket('ws://localhost:8088/ws')
              this.socket.onmessage = function (event) {
    
    
                    var ta = document.getElementById('responseTest')
                    ta.value = ta.value + '\n' + event.data
                }
              this.socket.onopen = function (event) {
    
    
                    var ta = document.getElementById('responseTest')
                    ta.value = '连接开启!'
                }
                this.socket.onclose = function (event) {
    
    
                    var ta = document.getElementById('responseTest')
                    ta.value = '连接关闭!'
                }
            } else {
    
    
                alert('你的浏览器不支持WebSocket')
            }
        },
        input(e) {
    
    
            this.inputVal = e.detail.value
        },
        clean() {
    
    
            document.getElementById('responseTest').value = ''
        },
        send(message) {
    
    
            if (!window.WebSocket) {
    
    
                return
            }
          if (this.socket.readyState === WebSocket.OPEN) {
    
    
              this.socket.send(message)
            } else {
    
    
                alert('连接没有开启')
            }
        },
    },
    mounted() {
    
    
        this.testWebsocket()
    },
}
</script>

<style></style>

2. Server

Using nodejs

const ws = require('ws')

const webserve = new ws.Server({
    
    port:8088})

//打开WebSocket服务器：通过监听open事件打开服务器
webserve.on('open',function open() {
    
    
    console.log('connected')
})

//关闭WebSocket服务器：通过监听close事件关闭服务器
webserve.on('close',function close() {
    
    
    console.log('disconnected')
})

//监听连接：ws通过connection事件来监听连接
webserve.on('connection',function connection(res,req) {
    
    
    const ip1 =  req.headers['x-forwarded-for'] || req.socket.remoteAddress
    const port1 = req.socket.remotePort
    const clientName = ip1+port1
    console.log('连接已开启，开始发送消息')

    // 发送数据：ws通过send()方法来发送到客户端数据
    // res.send('welcome，'+clientName)

  //接收数据：ws通过message事件来接收数据。当客户端有消息发送给服务器时，服务器就能够触发该消息
    res.on('message',function incoming(message) {
    
    
        console.log('received: %s from %s',message,clientName)

        /**
         * 准备的状态：ws中WebSocket类具有以下4中准备状态
         * 1、CONNCETION：值为0，表示连接还没有打开
         * 2、OPEN：值为1，表示连接已经打开，可以通信了
         * 3、CLOSING：值为2，表示连接正在关闭
         * 4、CLOSED：值为2，表示连接已经关闭
         */
        webserve.clients.forEach(function each(client) {
    
    
            if(client.readyState === ws.OPEN){
    
    
                client.send(message.toString())
            }
        })
    })
})