An HTTP/3 Module for the Apache HTTP Server Using OpenSSL QUIC and nghttp3

OpenSSL 3.2 introduced native QUIC support, enabling HTTP/3 on top of the world’s most widely deployed TLS library. Apache httpd, however, is still architected around TCP-based connections and its Multi-Processing Modules (MPMs), which makes integrating QUIC and HTTP/3 non-trivial. An example codebase (openssl-h3-examples) already demonstrates HTTP/3 using OpenSSL’s QUIC support and nghttp3 in a standalone server, and reuses patterns inspired by mod_http2, but it remains experimental and is not integrated into httpd as a module. This project proposes a new HTTP/3 module for Apache httpd, building on OpenSSL QUIC and nghttp3, and aims to resolve the architectural mismatch between httpd’s TCP-oriented worker model and QUIC’s UDP-based, stream-multiplexed transport. The goal is a maintainable, reviewable prototype module that the Apache HTTP Server community can evaluate and evolve toward production readiness.