A very minimal webserver built on top of epoll
Technical explanation (italian) available here.
This project has been made for the OS Design exam at Unimore and is based on this one, which is a multithreaded web server done the "classic" way (each thread handles a connection). I wanted to revisit this simple project with non-blocking I/O, so here you have epolly!
This is a project I'd been wanting to do for a very long time, simply because I've always been fascinated by epoll and non-blocking I/O.
git clone https://github.com/emilianomaccaferri/epolly/
cd epolly
serach for the variable WWW_PATH inside the lib/http_request.c file (line 9) and set this variable to the path you want to serve via HTTP (e.g. if your index.html is inside /var/www/html, just set WWW_PATH "/var/www/html" (sorry, it sucks, but I didn't have much time).
mkdir bin
make
./bin/epolly
you can change some parameters (port, number of threads...) inside main.c.
Tests have been performed on my 6-core AMD Ryzen 5600x with wrk.
The results are quite satisfying since I didn't have time to optimize many things:
Running 30s test @ http://127.0.0.1:8080/index.html
12 threads and 400 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 13.08ms 17.20ms 300.37ms 86.14%
Req/Sec 1.56k 1.69k 10.17k 76.52%
519453 requests in 30.08s, 201.64MB read
Socket errors: connect 0, read 519453, write 0, timeout 0
Requests/sec: 17268.68
Transfer/sec: 6.70MB
Good job, epolly!