High-Performance HTTP Server in C

A lightweight, high-performance HTTP server written in pure C, designed for speed and scalability.
It uses epoll for efficient I/O multiplexing and a thread pool for concurrency, allowing it to handle thousands of simultaneous connections with minimal overhead.

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Features

• Ultra-lightweight: Minimal dependencies, written in pure C.
• Fast Endpoints:
  • GET / → responds with raw text "OK".
  • GET /stats → responds with real-time JSON statistics:
    • total_connections: total number of connections since server start.
    • rps: requests per second (updated every second).
• High Concurrency: Combines epoll with multi-threading for maximum throughput.
• Optimized for Linux: Uses non-blocking sockets and atomic counters.

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Build & Run

Requirements

• Linux-based system
• GCC (supporting C11 standard)
• POSIX threads (pthread)

install

git clone https://github.com/VryptLab/http-server.git
make clear && make

Run

./server

By default, the server listens on port 8080.

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Usage

• Access the root endpoint:

  curl http://localhost:8080/

  Response:

  OK
  

• Access server statistics:

  curl http://localhost:8080/stats

  Example response:

  {
    "total_connections": 42,
    "rps": 7
  }

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Performance Notes

• Designed to handle high numbers of concurrent connections using epoll (edge-triggered I/O).
• Multithreaded with a thread pool equal to the number of CPU cores.
• Atomic counters ensure safe, lock-free statistics tracking.

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Use Cases

• Benchmarking and load testing tools.
• Educational reference for building scalable servers in C.
• Lightweight alternative to heavy HTTP frameworks.

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License

This project is released under the MIT License.
You are free to use, modify, and distribute it as long as the license terms are respected.