A simple HTTP server built entirely from scratch in TypeScript without relying on frameworks like Express or Fastify. This project focuses on understanding low-level networking concepts such as TCP sockets, parsing protocols, and building a functional HTTP/1.1 server.

This repo contains multiple small server implementations that progressively build up to a full HTTP server:

• echo-server/ — an echo server over raw TCP
• protocols/newline-proto.ts — a line-delimited protocol server
• protocols/http-1.ts — a basic HTTP/1.1 server implementation

Use the following npm scripts to start different servers:

npm run start:echo          # Starts the raw TCP echo server
npm run start:newline-proto # Starts a newline-delimited protocol server
npm run start:http          # Starts the HTTP server (http-1)

• Node.js >= 18
• TypeScript 5.x

Make sure you have tsx installed, which is already included in the dependencies.

Start the HTTP server:

npm run start:http

Then in another terminal:

curl -s --data-binary 'hello' http://127.0.0.1:65177/echo

You should receive a raw HTTP response built completely by your own server code.

• Add basic routing based on method + path
• Implement persistent connections (keep-alive)
• Support parsing request bodies (Content-Length and chunked encoding)
• Add minimal logging or middleware support