static file server in nim

serve.nim

import std/[asynchttpserver, asyncdispatch, os, strutils]

proc handleRequest(req: Request) {.async.} =
  let path = "." & req.url.path
  if fileExists(path):
    let content = readFile(path)
    let contentType = case path.splitFile.ext
      of ".html": "text/html"
      of ".css": "text/css"
      of ".js": "application/javascript"
      else: "application/octet-stream"
    await req.respond(Http200, content, newHttpHeaders({"Content-Type": contentType}))
  else:
    await req.respond(Http404, "404 Not Found")

proc main() =
  let server = newAsyncHttpServer()
  waitFor server.serve(Port(8080), handleRequest)

main()