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Ultra small http server with support for Lua scripts – Apache

I have a Renesas R5F571M processor that has 4MB of flash and 512K of RAM.
I need to run FreeRTOS and also have a web server that can run Lua scripts in order to interface to the hardware with custom C code.

Can anyone suggest a very compact HTTP+Lua server that I could use.
The Barracuda Application Server looks ideal but at around $20K is way out of my reach.
I would love to be able to use Nginx and PHP but the resource constraints preclude that option.

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Answers


  1. 0

    I once upon a time, worked with the Lighttpd web server. You could compile it under certain conditions to a binary as small as, ~400KB size (400KB << 4MB). On the backend you could interface it to the fastCGI C-library. The backend then you can write in C.

    You can skip the Lua scripts in my opinion. Or if you still want to use them, you could use the Lighttpd mod_magnet module which can work directly with Lua, so you can skip the FastCGI library. It also has a smaller memory footprint than Nginx, although I am not sure if it is small enough to fit in the 512KB RAM.

    p.s. Lighttpd is free.

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  2. 0

    on the compact side:

    • bozohttpd http://www.eterna.com.au/bozohttpd/ HTTP/1.x webserver that can run lua scripts but forks with every request so it’s stateless in that sense
    • lhttpd https://github.com/danristea/lhttpd HTTP/1.x HTTP/2 webserver that was inspired by bozohttpd but integrates lua coroutines with an event system (kqueue/epoll) to achieve non-blocking stateful execution.

    (disclaimer: I am the author of lhttpd)

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