Comment by 201984

Very nice!

A couple of notes: you'll want to use non-blocking I/O and an event loop to prevent one slow client from locking up the whole server. You should also check for partial read and write calls, so that if a client sends a couple bytes at a time, you can buffer up their full response and still be able to respond to it. A fixed size buffer for requests isn't ideal either since POST requests can easily blow through your 4096 byte buffer.

You might also want to look into using an AF_INET6 socket. You can still accept IPv4 connections, but you'll also gain IPv6 basically for free, and in 2025, you really should support IPv6.