Start it with awk -f http.awk. Edit the port and http dir by changing the values at line 2 and 4.
Why not?
The GNU implementation of awk (gawk) has builtin tcp and udp networking support. Opening a socket or listening on one is fairly trivial.
HttpService |& getline line creates a bidirectional pipe that can be read from or written to. The pipe is a tcp connection because of the way the path is constructed. Since the HTTP protocol is old it is easy to handroll.
Simply check if something is a GET request and serve the file that is asked for. realpath is used to prevent directory escaping.
networking in awk: https://www.gnu.org/software/gawk/manual/html_node/TCP_002fIP-Networking.html
- https://github.com/svenwiltink/awk-ircBot An IRC bot in awk that ran for a good while on our company's IRC server
- https://github.com/svenwiltink/AWKvent-of-code Advent of Code partially solved in awk and prolog