gistfile1.txt

#!/usr/bin/node
var net = require('net');
var fs = require('fs');

var server = require('net').createServer(function(conn) {
        var upsock = new net.Socket();
        var send = [];
        var connected = false;
        var connecting = false;
        console.log('===== CONNECT =====');

        function onconnect() {
                for(var i=0;i<send.length;i++) {
                        upsock.write(send[i]);
                }
                connected = true;
        };

        setTimeout(function() {
                if (connecting) return;
                console.log(conn.remoteAddress, 'connects to', 'ssh');
                connecting = true;
                upsock.connect(22, 'localhost', onconnect);
        }, 2000);

        conn.on('data', function(d) {
                if (!connecting) {
                        var utf = d.toString('utf8');
                        if (utf.substr(0, 100).match(/[A-Za-z]{2,8} \/\S* HTTP\/\d\.\d/)) {
                                console.log(conn.remoteAddress, 'connects to', 'http');
                                connecting = true;
                                upsock.connect(44301, 'localhost', onconnect);
                        } else {
                                console.log(conn.remoteAddress, 'connects to', 'https');
                                connecting = true;
                                upsock.connect(44302, 'localhost', onconnect);
                        }
                }
                if (connected) {
                        if (upsock.writable) upsock.write(d);
                } else {
                        send.push(d);
                }
        });
        conn.on('close', function() {
                upsock.end();
                console.log('===== DISCONNECT =====');
        });
        upsock.on('data', function(d) {
                if (conn.writable) conn.write(d);
        });
        upsock.on('close', function() {
                conn.end();
        });
});
server.listen(44300);

var http = require('http').createServer(function(req, res) {
        console.log('request http:', req.url, req.headers);
        res.writeHead(200, {'content-type': 'text/plain'});
        res.end('qwertyuiop');
});
http.listen(44301);

var https = require('https').createServer({
        key: fs.readFileSync('key.pem'),
        cert: fs.readFileSync('cert.pem'),
}, function(req, res) {
        console.log('request https:', req.url, req.headers);
        res.writeHead(200, {'content-type': 'text/plain'});
        res.end('qwertyuiop');
});
https.listen(44302);