Javascript 安全WebSocket通信

我试着在这里寻找解决方案，但没有真正有效的方法。 我需要创建一个与WebSocket的安全连接。 Im使用websocket扩展来测试URL：

• wss://localhost:443
• ws://localhost:8443 这是服务器代码：

对于证书，我使用了Openssl命令行 有什么想法吗

var fs = require('fs');

// read ssl certificate
var privateKey = fs.readFileSync('private.pem', 'utf8');
var certificate = fs.readFileSync('server.cert', 'utf8');

var credentials = { key: privateKey, cert: certificate };
var https = require('https');

//pass in your credentials to create an https server
var httpsServer = https.createServer(credentials);
httpsServer.listen(8443);

var WebSocketServer = require('ws').Server;
var wss = new WebSocketServer({
    server: httpsServer
});

wss.on('connection', function connection(ws) {
    ws.on('message', function incoming(message) {
        console.log('received: %s', message);
        ws.send('reply from server : ' + message)
    });
    ws.send('something');
});