Dumps individual TCP 'requests' to files. I use this for creating test files when I'm implementing protocols in Node.

netStreamDump.js

var port = 8080;
require('net').createServer(function(stream) {
  var id = Date.now();
  var filename = stream.remoteAddress + '.' + id + '.dump';
  var dumpStream = require('fs').createWriteStream(filename);
  dumpStream.on('close', function() {
    console.error('File "' + filename + '" closed');
  });
  stream.on('timeout', function() {
    console.error('Closing connection id ' + id + ', due to inactivity (timeout after 5 seconds)');
    stream.end();
  });
  stream.pipe(dumpStream);
  console.error('Connection from "' + stream.remoteAddress + ':' + stream.remotePort + '" (id ' + id + '), piping contents to "' + filename + '"');
  stream.setTimeout(5000);
}).listen(port, function() {
  console.error('TCP server listening on port: ' + port);
});