source: testjes/curl1.cpp

// http://curl.haxx.se/libcurl/c/libcurl-tutorial.html
#include <iostream>
#include <curl/curl.h>

size_t write_data(void *buffer, size_t size, size_t nmemb, void *userp)
{
  int written = fwrite(buffer, size, nmemb, (FILE *)userp);
  return written;
}
int main()
{
  static const char *headerfilename = "head.out";
  FILE *headerfile;
  static const char *bodyfilename = "body.out";
  FILE *bodyfile;
  curl_global_init(CURL_GLOBAL_ALL);
  CURL *c = curl_easy_init();
  curl_easy_setopt(c,CURLOPT_URL,"http://localhost:5050/cgi-bin/prenv/aap/noot");
  curl_easy_setopt(c, CURLOPT_NOPROGRESS, 1L);
  curl_easy_setopt(c, CURLOPT_WRITEFUNCTION, write_data);
  headerfile = fopen(headerfilename,"w");
  if (headerfile == NULL) {
    curl_easy_cleanup(c);
    return -1;
  }
  bodyfile = fopen(bodyfilename,"w");
  if (bodyfile == NULL) {
    curl_easy_cleanup(c);
    return -1;
  }
  curl_easy_setopt(c, CURLOPT_WRITEHEADER, headerfile);
  curl_easy_setopt(c, CURLOPT_WRITEDATA, bodyfile);

  int rc = curl_easy_perform(c);
  std::cout << "rc from perform: " << rc << std::endl;
  fclose(headerfile);
  fclose(bodyfile);
 
  /* cleanup curl stuff */ 
  curl_easy_cleanup(c);

}