There is, the Kepler folks came up with it, they call it WSAPI. My main use for mod_lua, right now, is actually not content handlers (regular apps), but things

There is, the Kepler folks came up with it, they call it WSAPI. My main use for mod_lua, right now, is actually not content handlers (regular apps), but things like auth modules, ripping out mod_rewrite, etc. A large news company in atlanta used it for mobile browser sniffing and redirects at the first point in apache's handler chain (the quick_handler), as well.