Req C3

An HTTP Library with basic Client/Server and CLI support, written in C3.

Features

This library will support:

• HTTP/1.1 parsing, serialization and deserialization of Requests and Response
• HTTP/2 framing
• HTTP/3, WebSockets, and QUIC (planned)
• Single-threaded HttpClient and HttpServer

Dependencies

• Current c3c version:

C3 Compiler Version:       0.7.8 (Pre-release, Dec 03 2025 13:47:36)
Git Hash:                  ccffa03de29a531dbfbad69b977e8f96a6433733
Backends:                  LLVM
LLVM version:              19.1.6

Quick Start

• Run tests

c3c test

Docs

• http1 module feature list