1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22#include <stdio.h>
23#include <string.h>
24
25#include <curl/curl.h>
26
27/*
28 * This is an example showing how to check a single file's size and mtime
29 * from an FTP server.
30 */
31
32static size_t throw_away(void *ptr, size_t size, size_t nmemb, void *data)
33{
34  (void)ptr;
35  (void)data;
36  /* we are not interested in the headers itself,
37     so we only return the size we would have saved ... */
38  return (size_t)(size * nmemb);
39}
40
41int main(void)
42{
43  char ftpurl[] = "ftp://ftp.example.com/gnu/binutils/binutils-2.19.1.tar.bz2";
44  CURL *curl;
45  CURLcode res;
46  const time_t filetime;
47  const double filesize;
48  const char *filename = strrchr(ftpurl, '/') + 1;
49
50  curl_global_init(CURL_GLOBAL_DEFAULT);
51
52  curl = curl_easy_init();
53  if(curl) {
54    curl_easy_setopt(curl, CURLOPT_URL, ftpurl);
55    /* No download if the file */
56    curl_easy_setopt(curl, CURLOPT_NOBODY, 1L);
57    /* Ask for filetime */
58    curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
59    /* No header output: TODO 14.1 http-style HEAD output for ftp */
60    curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, throw_away);
61    curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
62    /* Switch on full protocol/debug output */
63    /* curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); */
64
65    res = curl_easy_perform(curl);
66
67    if(CURLE_OK == res) {
68      /* http://curl.haxx.se/libcurl/c/curl_easy_getinfo.html */
69      res = curl_easy_getinfo(curl, CURLINFO_FILETIME, &filetime);
70      if((CURLE_OK == res) && filetime)
71        printf("filetime %s: %s", filename, ctime(&filetime));
72      res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &filesize);
73      if((CURLE_OK == res) && (filesize>0))
74        printf("filesize %s: %0.0f bytes\n", filename, filesize);
75    } else {
76      /* we failed */
77      fprintf(stderr, "curl told us %d\n", res);
78    }
79
80    /* always cleanup */
81    curl_easy_cleanup(curl);
82  }
83
84  curl_global_cleanup();
85
86  return 0;
87}
88