#include "curl.h"
 
int main(void)
{
  CURL *curl;
  CURLcode res;
 
  curl = curl_easy_init();
  if(curl) {

    /*perform a request that involves redirection*/
    curl_easy_setopt(curl, CURLOPT_URL, "https://nghttp2.org/httpbin/redirect/1");
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
    res = curl_easy_perform(curl);
    if(res != CURLE_OK)
      fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));

    /*count the number of requests by reading the first header of each request. Works as expected. */
    struct curl_header *h;
    int count = 0;
    int origins = (CURLH_HEADER|CURLH_TRAILER|CURLH_CONNECT|CURLH_1XX|CURLH_PSEUDO);
    while((h = curl_easy_nextheader(curl, origins, count, NULL))) {
        count++;
    }
    printf("count =%u\n",count ); /* count=2 */

    /*perform another request.*/
    curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com");
    res = curl_easy_perform(curl);
    if(res != CURLE_OK)
      fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));

    /*count the number of requests again. Always get NULL back. */
    count = 0;
    while((h = curl_easy_nextheader(curl, origins, count, NULL))) {
        count++;
    }
    printf("count =%u\n",count );/* count=0 */
    curl_easy_cleanup(curl);
  }
  return 0;
}