在Express应用程序中的HTTPS Web服务器上创建Websocket Secure

Question

我在express.js中有一个应用程序。我无法在HTTPS Web服务器上创建wss。

var fs = require('fs');
var express = require('express');
var app = express();

var cfg = {
    ssl: true,
    port: 8001,
    ssl_key: 'sslcert/ssl.key',
    ssl_cert: 'sslcert/ssl.crt'
};
var httpServ = (cfg.ssl) ? require('https') : require('http');
if (cfg.ssl) {
    httpsServer = httpServ.createServer({
            key: fs.readFileSync(cfg.ssl_key),
            cert: fs.readFileSync(cfg.ssl_cert)
        }, app)
        .listen(cfg.port, function () {
            console.log('Magic happening at https://Secure');
        });
} else {
    httpsServer = httpServ.createServer(app)
        .listen(cfg.port, function () {
            console.log('Magic happening at http://InSecure');
        });
}
var WebSocketServer = require('websocket')
    .server;
var wsServer = new WebSocketServer({
    httpServer: httpsServer
});

wsServer.on('connection', function connection(ws) {
    console.log('Socket Connected');
});

我的印象是将Web服务器的引用传递给WebSocket，然后WebSocket就会知道服务器的端口和SSL功能。但每次我在控制台中出现错误

  

与'ws：// localhost：8001 /？trackme = TUKOCVPAF'的WebSocket连接失败：在收到握手响应之前连接已关闭

如何在创建Websocket时创建wss：// localhost：8001 /？trackme = TUKOCVPAF'??