创建helloHttp.nimble文件：

# Package

version       = "0.1.0"
author        = "Your Name"
description   = "Your Description"
license       = "MIT"
srcDir        = "src"
bin           = @["helloHttp"]


# Dependencies

requires "nim >= 1.0.0"
requires "httpbeast >= 0.3.0"

创建src/helloHttp.nim文件：

import options, asyncdispatch

import httpbeast

proc onRequest(req: Request): Future[void] =
  if req.httpMethod == some(HttpGet):
    case req.path.get()
    of "/":
      req.send("Hello World")
    else:
      req.send(Http404)

run(onRequest)

通过nimble c -r helloHttp.nim运行。