使用回调函数时节点js中响应对象的范围

I have a function onRequest(request,response) which contains a callback function. When I try to print the data using response object (i.e. response.write()) in the callback function, its not printing. But the same data is printing on the console using console.log() Please help with why the response.write() is not working. I have a function onRequest(request,response) w