1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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 https://curl.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 #include <stdio.h>
25 #include <string.h>
26
27 #include <curl/curl.h>
28
29 /* <DESC>
30 * Checks a single file's size and mtime from an FTP server.
31 * </DESC>
32 */
33
throw_away(void * ptr,size_t size,size_t nmemb,void * data)34 static size_t throw_away(void *ptr, size_t size, size_t nmemb, void *data)
35 {
36 (void)ptr;
37 (void)data;
38 /* we are not interested in the headers itself,
39 so we only return the size we would have saved ... */
40 return (size_t)(size * nmemb);
41 }
42
main(void)43 int main(void)
44 {
45 char ftpurl[] = "ftp://ftp.example.com/gnu/binutils/binutils-2.19.1.tar.bz2";
46 CURL *curl;
47 CURLcode res;
48 long filetime = -1;
49 curl_off_t filesize = 0;
50 const char *filename = strrchr(ftpurl, '/') + 1;
51
52 curl_global_init(CURL_GLOBAL_DEFAULT);
53
54 curl = curl_easy_init();
55 if(curl) {
56 curl_easy_setopt(curl, CURLOPT_URL, ftpurl);
57 /* No download if the file */
58 curl_easy_setopt(curl, CURLOPT_NOBODY, 1L);
59 /* Ask for filetime */
60 curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
61 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, throw_away);
62 curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
63 /* Switch on full protocol/debug output */
64 /* curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); */
65
66 res = curl_easy_perform(curl);
67
68 if(CURLE_OK == res) {
69 /* https://curl.se/libcurl/c/curl_easy_getinfo.html */
70 res = curl_easy_getinfo(curl, CURLINFO_FILETIME, &filetime);
71 if((CURLE_OK == res) && (filetime >= 0)) {
72 time_t file_time = (time_t)filetime;
73 printf("filetime %s: %s", filename, ctime(&file_time));
74 }
75 res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T,
76 &filesize);
77 if((CURLE_OK == res) && (filesize > 0))
78 printf("filesize %s: %" CURL_FORMAT_CURL_OFF_T " bytes\n",
79 filename, filesize);
80 }
81 else {
82 /* we failed */
83 fprintf(stderr, "curl told us %d\n", res);
84 }
85
86 /* always cleanup */
87 curl_easy_cleanup(curl);
88 }
89
90 curl_global_cleanup();
91
92 return 0;
93 }
94
