https://github.com/khoih-prog/EthernetWebServer

This is simple yet complete WebServer library for Teensy, AVR Mega boards running Ethernet shields. The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.

The library supports
1. HTTP Server and Client
2. HTTP GET and POST requests, provides argument parsing, handles one client at a time.