/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2020, 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; }