TCP proxy server

client --> proxy --> remote --> proxy --> client

Файл proxy.js

var net = require('net');

var LOCAL_PORT = 8080
    , LOCAL_ADDR = '127.0.0.1'

    , REMOTE_PORT = 80
    , REMOTE_ADDR = 'google.com';

var server = net.createServer(function (socket) {
    socket.on('data', function (data) {
        console.log('------- START -------');
        console.log('<< From client to proxy ', data.toString());
        var serviceSocket = new net.Socket();
        serviceSocket.connect(REMOTE_PORT, REMOTE_ADDR, function () {
            console.log('>> From proxy to remote', data.toString());
            serviceSocket.write(data);
        });
        serviceSocket.on('data', function (data) {
            console.log('<< From remote to proxy', data.toString());
            socket.write(data);
            console.log('>> From proxy to client', data.toString());
        });
        serviceSocket.on('error', function () {throw error;});
    });
});

server.listen(LOCAL_PORT, LOCAL_ADDR, function () {
    console.log('TCP server accepting connection on port: ' + LOCAL_ADDR + ':' + LOCAL_PORT);
});