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 34static 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 43int 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