overload .emit()

overload-emit.js

var http, server, emit
http = require('http')
server = http.createServer(function () { console.log('ok') })
emit = emit = server.emit
server.emit = function () { 
  // log it out
  console.log('[server]:', arguments[0])
  // apply old emit
  emit.apply(this, arguments);
};

void server.listen(4000);