Static file server using jester, should be roughly equivalent to `python -m http.server`

jest.nim

import jester, asyncdispatch
from parseopt import getopt,CmdLineKind
from strutils import parseint,isDigit
from os import dirExists

proc usage():string = r"""
    Usage:  jest [<dir>][<port>][--host:<addr>]

    addr : the address to serve to, default: 'localhost'
    port : the port to serve to, default: 8000
    dir  : the directory to serve, default: local dir ( '.' ). Needs to exist.
"""

var 
  prt :int = 8000
  dir :string = "."
  adr :string = "localhost"

for kind,key,val in getopt():
  case kind:
  of cmdArgument:
    if key.string[0].isDigit: prt = key.string.parseint
    elif dirExists(key): dir = key
    else: 
      echo usage()
      quit()
  of cmdShortOption:
    echo usage()
    quit()
  of cmdLongOption:
    case key:
    of "host": adr = val
    else: 
      echo usage()
      quit()
  of cmdEnd: quit()

settings:
  staticDir = dir
  port = Port(prt)
  bindAddr = adr

routes:
  get "/":
    redirect(uri("index.html"))

runForever()