http/pipe-req

43.js

var fs = require('fs');

require('http').createServer(function(req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});

  if (req.method === 'GET') {
    fs.createReadStream(__dirname + '/form.html').pipe(res);
  } else {
    var fileName = __dirname + '/request_' + Date.now() + '.log';
    console.log('writing to ', fileName);
    var file = fs.createWriteStream(fileName);

    req.pipe(file);

    req.on('end', function() {
      res.end('Submitted, thanks');
    });
  }

}).listen(4001);