WebServ is C++ web server capable of hosting an HTTP server, managing incoming requests, and interpreting configuration files.
HTTP/1.1 : Message Syntax and Routing (RFC 7230)
HTTP/1.1 : Semantics and Content (RFC 7231)
HTTP/1.1 : Conditional Requests (RFC 7232)
HTTP/1.1 : Range Requests (RFC 7233)
HTTP/2 : Header Compression (RFC 7241)
HTTP/1.1 is a delightfully simple protocol, if you ignore most of it ;)