Demo of posting data to webpage via lib curl.

curl-post.c

/*
 * Demo of posting data to webpage via lib curl.
 * Build: gcc curl-post.c -o curl-post -lcurl
 * Run: ./curl-post
 */

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

int main(void) {
  CURL *curl;
  CURLcode res;
  /* In windows, this will init the winsock stuff */
  curl_global_init(CURL_GLOBAL_ALL);
  /* get a curl handle */
  curl = curl_easy_init();
  if(curl) {
    /* Set the URL that is about to receive our POST. */
    curl_easy_setopt(curl, CURLOPT_URL, "http://baidu.com");
    /* Now specify the POST data */
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "name=count&value=10000");
    /* Perform the request, res will get the return code */
    res = curl_easy_perform(curl);
    /* Check for errors */
    if(res != CURLE_OK)
      fprintf(stdout, "curl_easy_perform() failed: %s\n",
          curl_easy_strerror(res));
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
  curl_global_cleanup();
  return 0;
}