curl_easy_setopt(ch, CURLOPT_AUTOREFERER, 1);
curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, http_curl_body_callback);
curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, http_curl_hdrs_callback);
curl_easy_setopt(ch, CURLOPT_AUTOREFERER, 1);
curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, http_curl_body_callback);
curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, http_curl_hdrs_callback);