There was a “Web Server in a Box” project a few years back with released source (C), and I got that working ok.
It’s a dsPic that uses one of Microchip’s companion ethernet controllers for a largely 2 chip + SD card web server.
The project was based on code that MC provide for a similar development board of their own.

Schematics and source for it are pretty easy to Google. It was popular a the time for tinkerers including myself.
http://www.siliconchip.com.au/Issue/...1?res=nonflash