node如何让一个端口同时支持https与http

var net = require('net');
var http = require('http');
var https = require('https');
var fs = require('fs');

var httpPort = 3345;
var httpsPort = 3346;

var server = http.createServer(function(req, res){
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('hello world!');
}).listen(httpPort);

var options = {
key: fs.readFileSync('./cakey.pem'),
cert: fs.readFileSync('./cacert.pem')
};

var sserver = https.createServer(options, function(req, res){
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('secured hello world');
}).listen(httpsPort);

net.createServer(function(socket){
socket.once('data', function(buf){
console.log(buf[0]);
// https数据流的第一位是十六进制“16”，转换成十进制就是22
var address = buf[0] === 22 ? httpsPort : httpPort;
//创建一个指向https或http服务器的链接
var proxy = net.createConnection(address, function() {
proxy.write(buf);
//反向代理的过程，tcp接受的数据交给代理链接，代理链接服务器端返回数据交由socket返回给客户端
socket.pipe(proxy).pipe(socket);
});

proxy.on('error', function(err) {
console.log(err);
});
});

socket.on('error', function(err) {
console.log(err);
});
}).listen(3344);