@prafulchaudhari

Storing Uploaded Files and Serving Them in Express

Apr 23 · 12 min read · Accepting a file upload is just the first step. Knowing where to put it, how to name it safely, and how to serve it back, that's what makes it production-ready. The Two-Part Problem When a user uplo

Sessions vs JWT vs Cookies: Understanding Authentication Approaches

Apr 23 · 13 min read · Every web app needs to remember who you are. How it does that, sessions, cookies, or tokens, shapes the entire architecture. The Core Problem: HTTP Is Forgetful HTTP is stateless. Every request your

Dispatches from Below the Shell

Apr 22 · 9 min read · What happens when you stop running commands and start reading the filesystem like a system detective. Finding 01 — DNS is a three-layer negotiation, not a single config file Networking | /etc/resolv.

Async Code in Node.js: Callbacks and Promises

Apr 21 · 11 min read · Node.js is built to never wait. Understanding how it handles async work is the key to writing good server-side JavaScript. Why Async Code Exists in Node.js Node.js runs on a single thread. That mean

Understanding the this Keyword in JavaScript

Apr 21 · 10 min read · this doesn't mean "this function" or "this file". It means "whoever called me". That one shift in thinking makes everything click. Why this Confuses People this is one of those things that seems sim