A simple netcat type tool for Windows (or anything really since it's written in javascript but no reason to use it on Linux)

nc.js

var http = require('http');
var stdin = process.openStdin();
const PORT = 8080;

function handleRequest(request, response) {
  console.log('Incoming request...');
  body = '';
  request.on('data', function(chunk) {
    body += chunk;
  });
  request.on('end', function() {
    console.log('Received data: ' + body);
    response.writeHead(200);
    body = '';
    stdin.addListener('data', function(d) {
      if(d.toString().replace(/\s+$/, '') == '.') {
        response.end(body);
        stdin.removeAllListeners('data');
      } else {
        body += d;
      }      
    });
  });
  
}

var server = http.createServer(handleRequest);

server.listen(PORT, function() {
  console.log('Server listening on http://localhost:%s', PORT);
});