• 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:

     1 {
     2     "code": "00000",
     3     "msg": " ",
     4     "data":{
     5     "getSecurityIndex":[{
     6         "securityIndex": "66.6"
     7     }],
     8     "getEventAndDeviceData":[{
     9          "eventData": "10",
    10          "deviceData": "0"
    11     }],
    12     "getEventStatusData":[{
    13       "state": "处理中",
    14       "time": "2018.4.10",
    15       "con": "园区周界越界"
    16     },
    17     {
    18       "state": "未处理",
    19       "time": "2018.4.9",
    20       "con": "中央水塘"
    21     },
    22     {
    23       "state": "处理中",
    24       "time": "2018.4.6",
    25       "con": "酒店附近"
    26     },
    27     {
    28       "state": "已完成",
    29       "time": "2018.4.6",
    30       "con": "西南拐角"
    31     },
    32     {
    33       "state": "已完成",
    34       "time": "2018.4.6",
    35       "con": "酒店负一层"
    36     }],
    37     "getEventAlarmData":[{
    38        "name": "周界越界",
    39        "percent": "50%"
    40      },
    41     {
    42       "name": "停车占道",
    43       "percent": "30%"
    44     },
    45    {
    46       "name": "重点人员",
    47       "percent": "21%"
    48    }],
    49     "getEquipmentFailureData":[{
    50       "name": "摄像头",
    51       "percent": "70%"
    52     },
    53    {
    54       "name": "人行道闸",
    55       "percent": "40%"
    56    },
    57    {
    58      "name": "电梯",
    59      "percent": "35%"
    60    }]
    61    }
    62  }
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  • 原文地址:https://www.cnblogs.com/zeng2210/p/8847873.html
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