C23 HTTP/1.1 Parser
===================

A small C23 project for parsing HTTP/1.1 requests (RFC 9112).
It uses Linux-only epoll server to accept connections and respond to requests.

Behaviour
---------

Current behaviour is intentionally simple:
- If a request parses successfully, the server returns 200 OK.
- If parsing fails, the server returns 400 Bad Request.
- If connection capacity is exhausted, the server returns 503 Service Unavailable.

Scope
-----

Implemented today:
- Request line parsing
- Header field parsing and basic validation
- Request framing checks for incomplete vs complete messages
- Parser result states
- Fixed-size header array and basic metadata tracking
- Non-blocking, level-triggered epoll loop for connection handling

Not implemented:
- Routing / endpoint dispatch
- Full request body semantics
- Cross-platform event loop

Platform Notes
--------------

This project has been tested on Linux and uses Linux-specific APIs:
- epoll
- non-blocking sockets via fcntl
- typical POSIX networking calls

Build
-----

Requirements:
- CMake >= 4.0
- C compiler with C23 support


Init:
./build.sh -i

Build & Run:
./build.sh -b


Run
---

Default sever port is 8000.
Run with:

./build.sh -b

In another terminal run:

curl -v http://localhost:8000

Test
----

./build.sh -t