websocket后台数据推送

Websocket定义：

说明：

作为下一代的 Web 标准，HTML5 拥有许多引人注目的新特性，如 Canvas、本地存储、多媒体编程接口、WebSocket 等等。这其中有“Web 的 TCP ”之称的 WebSocket 格外吸引开发人员的注意。WebSocket 的出现使得浏览器提供对 Socket 的支持成为可能，从而在浏览器和服务器之间提供了一个基于 TCP 连接的双向通道。Web 开发人员可以非常方便地使用 WebSocket 构建实时 web 应用，开发人员的手中从此又多了一柄神兵利器。本文首先介绍 HTML5 WebSocket 的基本概念以及这个规范试图解决的问题，然后介绍 WebSocket 的基本原理和编程接口。接下来会通过一个简单案例来示范怎样实现一个 WebSocket 应用，并且展示 WebSocket 如何在功能强大和编程简单易用上达到的完美统一。最后介绍了目前主流浏览器对 WebSocket 支持的状况、局限性以及未来的展望。

Websocket在vue项目中的使用dome：

1）加入Websocket

其中config.js，如下图

其中index.js，如下图

2）在组件中引入

3）在组件中获取数据

这样就可获得websocket后台推送的数据

websocket手动输入json数据测试页代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

    <title>Insert title here</title>

    <script

            src="https://code.jquery.com/jquery-3.2.1.js"

            integrity="sha256-DZAnKJ/6XZ9si04Hgrsxu/8s717jcIzLy3oi35EouyE="

            crossorigin="anonymous"></script>

    <script src="https://cdn.bootcss.com/sockjs-client/1.0.3/sockjs.js"></script>

    <script>

        var websocket;

		//var wspath='127.0.0.1:9018/scp-websocketcomponent';

		//var wspath='192.168.0.242:39018';

		var wspath='192.168.0.109:9018';

		var wsurl="/egscuimain/readData";

		console.log(' location.search: '+ location.search)

		if (location.search == '?ws') {

			wsurl=="/egscuimain/readData";

		} else if(location.search == '?ws1') {

		    wsurl="/egscuigardensecurity/readData";

		}else if(location.search == '?ws2') {

			wsurl="/egscuicarstatistics/readData";

		}else if(location.search == '?ws3') {

			wsurl="/egscuipersonstatistics/readData";

		}else{

			wsurl=="/egscuimain/readData";

		}

		 if ('WebSocket' in window) {

                websocket = new WebSocket("ws://"+wspath+"/webSocket"+wsurl);

            } else if ('MozWebSocket' in window) {

                websocket = new MozWebSocket("ws://"+wspath+"/webSocket"+wsurl);

            } else {

			websocket = new SockJS("http://"+wspath+"/sockjs"+wsurl);

		}

		console.log('wspath: ' + wspath+' > wsurl:'+ wsurl)

        websocket.onopen = function (evnt) {

            $("#msgcount").append("WebSocket链接开始！<br/>");

        };

        websocket.onmessage = function (evnt) {

            $("#msgcount").append(evnt.data+"<br/>");

        };

        websocket.onerror = function (evnt) {

            $("#msgcount").append("WebSocket链接出错！<br/>");

        };

        websocket.onclose = function (evnt) {

            $("#msgcount").append("WebSocket链接关闭！<br/>");

        };

        function send() {

            websocket.send($("#msg").val());

        }

    </script>

</head>

<body>

<hr/>

<textarea rows="5" cols="20" id="msg"></textarea>

<br>

<button onclick="send()">发送</button>

<hr />

<div id="msgcount"></div>

</body>

</html>

另加websocket中自己的数据格式：

 {

     "code": "00000",

     "msg": " ",

     "data":{

     "getSecurityIndex":[{

         "securityIndex": "66.6"

     }],

     "getEventAndDeviceData":[{

          "eventData": "10",

          "deviceData": "0"

     }],

     "getEventStatusData":[{

       "state": "处理中",

       "time": "2018.4.10",

       "con": "园区周界越界"

     },

     {

       "state": "未处理",

       "time": "2018.4.9",

       "con": "中央水塘"

     },

     {

       "state": "处理中",

       "time": "2018.4.6",

       "con": "酒店附近"

     },

     {

       "state": "已完成",

       "time": "2018.4.6",

       "con": "西南拐角"

     },

     {

       "state": "已完成",

       "time": "2018.4.6",

       "con": "酒店负一层"

     }],

     "getEventAlarmData":[{

        "name": "周界越界",

        "percent": "50%"

      },

     {

       "name": "停车占道",

       "percent": "30%"

     },

    {

       "name": "重点人员",

       "percent": "21%"

    }],

     "getEquipmentFailureData":[{

       "name": "摄像头",

       "percent": "70%"

     },

    {

       "name": "人行道闸",

       "percent": "40%"

    },

    {

      "name": "电梯",

      "percent": "35%"

    }]

    }

  }