HTTP Server in C

A minimal HTTP server written from scratch in C. Binds to localhost:3000 and responds to requests with a plain HTML page — no libraries, no frameworks, just raw sockets and the C standard library.

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📁 Project Structure

http-server/
├── Server.h       # Server struct definition and function declarations
├── Server.c       # Socket setup, bind, listen, accept, and HTTP response logic
└── test.c         # Entry point — initialises and runs the server

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Prerequisites

• GCC or any C99-compatible compiler
• Linux / macOS (uses POSIX sockets)

Build

gcc test.c Server.c -o server

Run

./server

Then open your browser and navigate to:

http://localhost:3000

You should see:

Hello, World!

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🔧 How It Works

1. Socket creation — opens a TCP socket with socket()
2. Bind — binds to 127.0.0.1:3000 with bind()
3. Listen — marks the socket as passive with listen()
4. Accept loop — blocks on accept(), handling one connection at a time
5. HTTP response — writes a minimal valid HTTP/1.1 response with a Content-Type: text/html header and an <h1>Hello, World!</h1> body
6. Close — closes the connection socket and loops back to accept the next request