[网络协议]node.js实现websocket

导入模块这些基础操作这里不进行赘述：
首先启动一个websocket服务端：

var ws = require('nodejs-websocket');
console.log('开始建立连接...')
let count = 0
ws.createServer(function (conn) {
    conn.on('text', function (str) {
        console.log('浏览器给服务端收到的信息为:' + str)
        conn.sendText('服务器下发的内容=>'+str)
    })
    conn.on('close', function (code, reason) {
        console.log('关闭连接', code, reason)
    });
    conn.on('error', function (code, reason) {
        console.log('异常关闭', code, reason)
    });
}).listen(8001)
console.log('WebSocket建立完毕');

然后再vue中使用的话类似下面这段代码：

<template>
  <div class="hello">
    <el-button @click="test">测试</el-button>
  </div>
</template>

<script>
export default {
  name: 'HelloWorld',
  data () {
    return {
      msg: 'Welcome to Your Vue.js App',
      ws: window.WebSocket ? new WebSocket('ws://127.0.0.1:8001') : null
    }
  },
  created () {
  },
  methods: {
    test () {
      this.ws.onopen = function () {
        console.log('连接服务器成功!')
        this.ws.send('startting...')
      }
      this.ws.onclose = function () {
        console.log('服务器关闭')
      }
      this.ws.onerror = function () {
        console.log('连接出错')
      }
      this.ws.onmessage = function (e) {
        console.log(e.data)
      }
      this.ws.send('startting11111111111...')
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h1, h2 {
  font-weight: normal;
}
ul {
  list-style-type: none;
  padding: 0;
}
li {
  display: inline-block;
  margin: 0 10px;
}
a {
  color: #42b983;
}
</style>