在Express 4.x中启动HTTPS

我正在尝试使用Express 4.x在HTTPS中启动服务器。 我试过了

var credentials = {key: privateKey, cert: certificate}; var app = express(credentials); 

但它不工作。

你可以很容易地做这样的事情:

 var app = express(), credentials = {key: privateKey, cert: certificate}, server = https.createServer(credentials, app); server.listen(8443);