client.c

#include <stdio.h>
#include <curl/curl.h>
 
int main(void)
{
  CURL *curl;
  CURLcode res;
 
  /* In windows, this will init the winsock stuff */ 
  curl_global_init(CURL_GLOBAL_ALL);
 
  curl = curl_easy_init();

  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "http://localhost:9999");

    curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10L);
    curl_easy_setopt(curl, CURLOPT_TIMEOUT, 20L);

    struct curl_slist *headers = NULL;
    headers = curl_slist_append(headers, "x-pretty-print: 2");
    headers = curl_slist_append(headers, "content-type: application/json");
    headers = curl_slist_append(headers, "accept: application/json");
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);


    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "name=daniel&project=curl");
 
    res = curl_easy_perform(curl);
    if(res != CURLE_OK)
      fprintf(stderr, "curl_easy_perform() failed: %s\n",
              curl_easy_strerror(res));
 
    curl_easy_cleanup(curl);
  }
  curl_global_cleanup();
  return 0;
}