Crystal calling libcurl

curl.cr

@[Link("curl")]
lib LibCurl
  type CURL =  Void*
  type CURLoption = Int32


  fun create = curl_easy_init(): CURL
  fun set_opt = curl_easy_setopt(CURL, Int32, UInt8*)
  fun get     = curl_easy_perform(CURL)
  fun cleanup = curl_easy_cleanup(CURL)
end

class Curl
  def initialize
    @curl = LibCurl.create
  end

  def get(url = "http://www.google.com")
   if @curl
    LibCurl.set_opt(@curl, 10002, url)
    res = LibCurl.get(@curl)
   end
  end

  def finalize
    LibCurl.cleanup(@curl)
  end
end

curl = Curl.new
curl.get