nodejs——js 实现webSocket 兼容移动端

//服务器端
//npm install --save ws
const express = require('express');
const http = require('http');
const url = require('url');
const WebSocket = require('ws');const app = express();app.use(function (req, res) {
res.send({ msg: "hello" });
});const server = http.createServer(app);
const wss = new WebSocket.Server({ server });var stocks = {
"con1": 95.0,
"con2": 50.0,
"con3": 300.0,
"con4": 550.0,
"con5": 35.0
}
function randomInterval(min, max) {
return Math.floor(Math.random() * (max - min + 1) + min);
}
var stockUpdater;
var randomStockUpdater = function() {
for (var symbol in stocks) {
if(stocks.hasOwnProperty(symbol)) {
var randomizedChange = randomInterval(-150, 150);
var floatChange = randomizedChange / 100;
stocks[symbol] += floatChange;
}
}
var randomMSTime = randomInterval(500, 2500);
stockUpdater = setTimeout(function() {
randomStockUpdater();
}, randomMSTime);
}
randomStockUpdater(); wss.on('connection', function (ws) {
var sendStockUpdates = function (ws) {
if (ws.readyState == 1) {
var stocksObj = {};
for (var symbol in clientStocks) {
stocksObj[symbol] = stocks[symbol];
}
if (stocksObj.length !== 0) {
ws.send(JSON.stringify(stocksObj));//需要将对象转成字符串。WebSocket只支持文本和二进制数据
console.log("更新", JSON.stringify(stocksObj));
}
}
}
var clientStockUpdater = setInterval(function () {
sendStockUpdates(ws);
}, 5000);
ws.on('message', function (message) {
var stockRequest = JSON.parse(message);//根据请求过来的数据来更新。
console.log("收到消息", stockRequest);
clientStocks = stockRequest;
sendStockUpdates(ws);
});
});server.listen(8080, function listening() {
console.log('Listening on %d', server.address().port);
});

//客户端 vue，写成普通html 直接用浏览器访问也可以
<template>
<div>
<button @click="check"> 启动 </button>
<div id="con1"></div>
<div id="con2"></div>
<div id="con3"></div>
<div id="con4"></div>
<div id="con5"></div>
</div></template>
<script> export default {
data () {
return { }
},
methods:{
check(){ var isClose = false;
var stocks = {
"con1": 0, "con2": 0, "con3": 0, "con4": 0, "con5": 0
};
var WebSocketsExist = true;
try {
var ws = new WebSocket("ws://10.20.11.180:8080");
} catch (ex) {
try
{
ws = new MozWebSocket("ws://10.20.11.180:8080");
}
catch(ex)
{
WebSocketsExist = false;
}
} if (WebSocketsExist) {
alert("您的浏览器支持WebSocket. 您可以尝试连接到聊天服务器!");
} else {
alert("您的浏览器不支持WebSocket。请选择其他的浏览器再尝试连接服务器。");
} function updataUI() {
ws.onopen = function (e) {
console.log('Connection to server opened');
isClose = false;
ws.send(JSON.stringify(stocks));
console.log("sened a mesg");
}
//更新UI
var changeStockEntry = function (symbol, originalValue, newValue) {
document.getElementById(symbol).innerHTML = symbol+' : '+newValue.toFixed(2);
}
// 处理受到的消息
ws.onmessage = function (e) {
var stocksData = JSON.parse(e.data);
console.log(stocksData)
console.log('-----------------------------------------');
for (var symbol in stocksData) {
if (stocksData.hasOwnProperty(symbol)) {
changeStockEntry(symbol, stocks[symbol], stocksData[symbol]);
stocks[symbol] = stocksData[symbol];
}
}
};
}
updataUI();
}
}, }</script>