client.nim

import asyncdispatch, httpclient

var client = newAsyncHttpClient()
let fut = withTimeout(client.getContent("https://localhost:8080"), 2500)
discard waitFor fut
echo fut.failed

compile.txt

nim c -d:release -d:ssl http_test_server.nim
nim c -d:release -d:ssl http_test_client.nim

./http_test_server
./http_test_client

output:
  false

server.nim

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)