downloadxml.nim

import libcurl

const
  feed = "https://feeds.feedburner.com/breitbart?format=xml"

var downloaded = newstringofcap(1024)
proc onwrite(buffer: cstring; size, nitems: int; outstream: pointer): int =
  let total = size * nitems
  for i in 0..<total:
    downloaded.add buffer[i]
  return total

var handle = easy_init()
discard easy_setopt(handle, Opt_url, feed)
discard easy_setopt(handle, Opt_verbose, 1)
discard easy_setopt(handle, Opt_writefunction, onwrite)
echo easy_perform(handle)
easy_reset(handle)

echo downloaded