wai-cli

A command line runner for Wai apps (using Warp) with support for:

• --protocol http --port 8000 TCP sockets
• --protocol unix --socket /var/run/app/sock UNIX domain sockets
• --protocol cgi running as a CGI app (the original serverless lambda functions from the 90s)
• --protocol fastcgi running as a FastCGI app (OPTIONAL! You need to build with the fastcgi cabal flag and you need to have libfcgi (e.g. fcgi-devkit package on FreeBSD) installed)
• --protocol activate socket activation (systemd-compatible, but not restricted to systemd in any way. see soad for an interesting use of (de)activation!)
• --protocol (http+tls|unix+tls|activate+tls) --tlskey key.pem --tlscert cert.pem TLS (can be turned off with a cabal flag to avoid compiling the TLS library)
• --graceful (none|serve-normally|serve-503) graceful shutdown (on TERM signal)
• --devlogging development logging (from wai-extra)
• printing a pretty and colorful run message (e.g. Running on http port 3000 with 4 CPUs) (you can replace it with your own, or with nothing)

Usage

Add a dependency on wai-cli and write something like this:

{-# LANGUAGE OverloadedStrings #-}
import Web.Scotty
import Network.Wai.Cli
import Data.Monoid (mconcat)

app = scottyApp $ do
  get "/:word" $ do
    beam <- param "word"
    html $ mconcat ["<h1>Scotty, ", beam, " me up!</h1>"]

main = defWaiMain =<< app

Want to use command line args for your application-specific settings? Don't. Use environment variables instead. Possibly with dotenv to load some of them from a file. envy is a really awesome way to read them.

License

This is free and unencumbered software released into the public domain.
For more information, please refer to the UNLICENSE file or unlicense.org.