84. How HTTP Really Works Under the Hood | Build a Raw TCP Server Using Node.js Net Module

In this video, we dive deep into how HTTP actually works by creating a raw TCP server using Node.js's net module. You'll learn how to simulate an HTTP server without using the http module, how to analyze raw HTTP requests, and how to respond using pure TCP. We'll even use Postman to send real HTTP requests and inspect how data is transferred in clear text over TCP connections.

💡 What You’ll Learn:

How HTTP requests look in raw TCP
Building a basic TCP server using Node.js net module
Sending and inspecting raw HTTP requests with Postman
Logging and decoding buffer data from the client
Why HTTP is considered a cleartext protocol
The importance of encryption and HTTPS
How to simulate a real HTTP response over TCP
Overview of HTTP, HTTP/2, HTTP/3 on top of TCP and UDP
This video is perfect for developers learning networking, backend development, or anyone curious about how HTTP works under the hood without any abstraction.

📺 Stay till the end to see how we hardcode an HTTP response and successfully communicate with Postman over a raw TCP socket!

🔧 Code used in this video: (You can link your GitHub repo here)

📚 Topics Covered:

Node.js net module
TCP server
Raw HTTP data
Postman request inspection
UTF-8 decoding from buffers
Socket communication
Security implications of cleartext HTTP

Github Link:
HireAPI Node Project: https://github.com/leelawebdev/hireapi

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