server-http

A minimal HTTP server written in C, built from scratch without external libraries. The project focuses on the implementation of core data structures used to manage connections and parse HTTP requests.

Features

• TCP server listening on port 6700
• HTTP/1.1 request parsing (request line, headers, body)
• Custom implementations of common data structures
• Leveled logging system (DEBUG, NOTICE, WARNING)
• AddressSanitizer support for debugging

Project Structure

server-http/
├── src/
│   ├── main.c                  # Server entry point, connection loop
│   ├── network.c / network.h   # TCP socket abstraction (accept, send, recv)
│   ├── request.c / request.h   # HTTP request parser
│   ├── data-struct/
│   │   ├── linkedList.c/h      # Doubly linked list with iterator
│   │   ├── queue.c/h           # Queue built on top of the linked list
│   │   └── dictionary.c/h      # Hash map with FNV-1 hashing
│   └── malloc-utils/
│       └── malloc_utils.c/h    # Safe malloc wrappers
└── test/
    └── unit/
        └── client_test.tcl     # Basic client test script

Data Structures

Structure	Description
Linked List	Generic doubly linked list with head/tail pointers and a bidirectional iterator
Queue	Wrapper over the linked list exposing push, pop, and peek operations
Dictionary	Hash map using separate chaining; supports string and integer keys; uses FNV-1 hashing

Build

Requires gcc and make.

# Build the server
make all

# Build with AddressSanitizer
make bug-compile

# Clean build artifacts
make clean

# Show available targets
make help

Usage

Start the server (listens on port 6700 by default):

./server-http

Send a test request:

curl http://localhost:6700/
# → Hello World!

Notes

• The server handles one connection at a time (no threading or select/epoll yet).
• The current response is a static 200 OK with Hello World! regardless of the request.
• The dict type is used internally to store parsed request-line fields (method, URI) and header fields.