gistfile1.txt

#include <stdio.h>
#include <curl/curl.h>

size_t download_write(char *buf, size_t size, size_t n, void *data)
{
  return fwrite(buf, size, n, stdout);
}

size_t upload_read(char *buf, size_t size, size_t n, void *data)
{
  printf("XXXXXX READING!!!\n");
  return 0;
}

int main(void)
{
  CURLcode code = curl_global_init(CURL_GLOBAL_ALL);
  if (code != CURLE_OK) {
    return -1;
  }

  CURL *curl = curl_easy_init();
  if (curl == NULL) {
    return -1;
  }

  struct curl_slist *chunk = NULL;
  chunk = curl_slist_append(chunk, "Transfer-Encoding: chunked");

  curl_easy_setopt(curl, CURLOPT_HTTPHEADER,       chunk);
  curl_easy_setopt(curl, CURLOPT_USERAGENT,        "my-client/1.0");
  curl_easy_setopt(curl, CURLOPT_URL,              "myurl");
  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,    download_write);
  curl_easy_setopt(curl, CURLOPT_READFUNCTION,     upload_read);
  curl_easy_setopt(curl, CURLOPT_NOPROGRESS,       1L);
  curl_easy_setopt(curl, CURLOPT_VERBOSE,          0L);

  code = curl_easy_perform(curl);
  if (code != CURLE_OK) {
    return -1;
  }

  return 0;
}