curl/docs/examples/fileupload.c

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 *                                  _   _ ____  _
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 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
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 *
 */

#include <stdio.h>
#include <curl/curl.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(void)
{
  CURL *curl;
  CURLcode res;
  struct stat file_info;
  double speed_upload, total_time;
  FILE *fd;

  fd = fopen("debugit", "rb"); /* open file to upload */
  if(!fd) {

    return 1; /* can't continue */
  }

  /* to get the file size */
  if(fstat(fileno(fd), &file_info) != 0) {

    return 1; /* can't continue */
  }

  curl = curl_easy_init();
  if(curl) {
    /* upload to this place */
    curl_easy_setopt(curl, CURLOPT_URL,
                     "file:///home/dast/src/curl/debug/new");

    /* tell it to "upload" to the URL */
    curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);

    /* set where to read from (on Windows you need to use READFUNCTION too) */
    curl_easy_setopt(curl, CURLOPT_READDATA, fd);

    /* and give the size of the upload (optional) */
    curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
                     (curl_off_t)file_info.st_size);

    /* enable verbose for easier tracing */
    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

    res = curl_easy_perform(curl);

    /* now extract transfer info */
    curl_easy_getinfo(curl, CURLINFO_SPEED_UPLOAD, &speed_upload);
    curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &total_time);

    fprintf(stderr, "Speed: %.3f bytes/sec during %.3f seconds\n",
            speed_upload, total_time);

    /* always cleanup */
    curl_easy_cleanup(curl);
  }
  return 0;
}