HTTP.jl Julia

using Base64
using HTTP

const GIF = base64decode("R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==")
const HEADERS = ["Content-Type" => "image/gif", "Cache-Control" => "no-store"]

router = HTTP.Router()
HTTP.register!(router, "GET", "/pixel.gif", _ -> HTTP.Response(200, HEADERS, GIF))

HTTP.serve(router, "0.0.0.0", 8080)