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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
/* <DESC>
* Checks a single file's size and mtime from an FTP server.
* </DESC>
*/
static size_t throw_away(void *ptr, size_t size, size_t nmemb, void *data)
{
(void)ptr;
(void)data;
/* we are not interested in the headers itself,
so we only return the size we would have saved ... */
return (size_t)(size * nmemb);
}
int main(void)
{
char ftpurl[] = "ftp://ftp.example.com/gnu/binutils/binutils-2.19.1.tar.bz2";
CURL *curl;
CURLcode res;
long filetime = -1;
double filesize = 0.0;
const char *filename = strrchr(ftpurl, '/') + 1;
curl_global_init(CURL_GLOBAL_DEFAULT);
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, ftpurl);
/* No download if the file */
curl_easy_setopt(curl, CURLOPT_NOBODY, 1L);
/* Ask for filetime */
curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, throw_away);
curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
/* Switch on full protocol/debug output */
/* curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); */
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
/* https://curl.se/libcurl/c/curl_easy_getinfo.html */
res = curl_easy_getinfo(curl, CURLINFO_FILETIME, &filetime);
if((CURLE_OK == res) && (filetime >= 0)) {
time_t file_time = (time_t)filetime;
printf("filetime %s: %s", filename, ctime(&file_time));
}
res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD,
&filesize);
if((CURLE_OK == res) && (filesize>0.0))
printf("filesize %s: %0.0f bytes\n", filename, filesize);
}
else {
/* we failed */
fprintf(stderr, "curl told us %d\n", res);
}
/* always cleanup */
curl_easy_cleanup(curl);
}
curl_global_cleanup();
return 0;
}
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