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POReal time updation using node.js and websocket
 

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  1. POReal time updation using node.js and websocket
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    <p>I am implementing an websocket application which gives some real time data. After some research i came up with a code which gives me the desired output. But i know this is not the correct way of doing this. Please give any suggestion to make it right.</p> <p><strong>Server.js</strong> </p> <pre><code>var http = require('http'); var server = http.createServer(function (request, response) { response.writeHead(404); response.end(); }); var port = 8889; server.listen(port, function () { console.log('server is listening on port ' + port); }); var WebSocketServer = require('websocket').server; wsServer = new WebSocketServer({ httpServer: server, autoAcceptConnections: false }); var mysql = require('mysql'); var _livedata; var db_con = mysql.createConnection({ host : 'localhost', user : 'root', password : 'root', database: 'dev_db' }); function getLiveData() { db_con.query('SELECT * from live_data', function (err, rows, fields) { //* if (err) throw err; _livedata = rows[0]; }); } setInterval(getLiveData, 2000); // update _livedata wsServer.on('request', function (request) { var connection = request.accept('chat', request.origin); setInterval(sendLiveData, 5000); // sends updated _livedata function sendLiveData() { connection.sendUTF(JSON.stringify({ data: _livedata })); } }); </code></pre> <p><strong>Client.js</strong></p> <pre><code> socket = new WebSocket("ws://localhost:8889", 'chat'); socket.addEventListener("open", function () { var a = socket.send(JSON.stringify("Please send data")); }); socket.addEventListener('message', function (data) { var parsedData = JSON.parse(data.data).vehicle; console.log(parsedData) }); </code></pre> <ul> <li>live_data table is updated every 5 seconds.</li> </ul> <p>I am very new to node.js and websocket. Help!!</p>
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    2. COThat is about calling setinterval, using chat protocol, any security issues
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