httpd.lua - simple HTTP server library with zero dependencies (except inetd)

Install httpd.lua in your package.path.

Write an executable server script, for example: /usr/local/bin/httpd

#!/usr/bin/env lua

local httpd = require("httpd")
local server = httpd.create_server("/var/log/httpd.log")
server:add_route("GET", "/", function(request)
    return { status=200, reason="ok", body="hello, world!" }
end)
server:run(true)

Configure inetd: /etc/inetd.conf

http    stream  tcp     nowait  www    /usr/local/bin/httpd      httpd

Prepare the log file:

touch /var/log/httpd.log
chown www /var/log/httpd.log

I didn't feel like cross-compiling a bunch of stuff for a MIPS router I have. It has Lua interpreter on it, and I like Lua, so I wrote this.

This branch incorporates ryan-moeller/flualibs to implement WebSockets as well. The ws.flua script manages FreeBSD snapshot boot environments in a simplistic way. A button is shown when a new snapshot build is avalable to download. The button creates a new ZFS boot environment with bectl and extracts the snapshot distsets over it, preserving a few key files in /etc. Tables list the boot environments and downloaded snapshot files on the system, with buttons to delete ones no longer desired.

Some peculiarities of my environment are hardcoded, such as the location of my built flualibs and the name of my root pool ("system"). Adjust as needed.

A few C libraries are needed to implement the WebSocket protocol (namely libmd for SHA1, libroken for base64, and libxor for XOR unmasking).

Debugging during development leaves much to be desired for. It took me an embarrassingly long time to track down that a bectl command run via os.execute() was writing to stdout, breaking the WebSocket connection. This fragile nature is not ideal, but ultimately the thing does work.