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Annotation of embedaddon/curl/docs/examples/ftpgetinfo.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 1998 - 2019, 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.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: /* <DESC>
                     28:  * Checks a single file's size and mtime from an FTP server.
                     29:  * </DESC>
                     30:  */
                     31: 
                     32: static 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: 
                     41: int 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:   long filetime = -1;
                     47:   double filesize = 0.0;
                     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:     curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, throw_away);
                     60:     curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
                     61:     /* Switch on full protocol/debug output */
                     62:     /* curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); */
                     63: 
                     64:     res = curl_easy_perform(curl);
                     65: 
                     66:     if(CURLE_OK == res) {
                     67:       /* https://curl.haxx.se/libcurl/c/curl_easy_getinfo.html */
                     68:       res = curl_easy_getinfo(curl, CURLINFO_FILETIME, &filetime);
                     69:       if((CURLE_OK == res) && (filetime >= 0)) {
                     70:         time_t file_time = (time_t)filetime;
                     71:         printf("filetime %s: %s", filename, ctime(&file_time));
                     72:       }
                     73:       res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD,
                     74:                               &filesize);
                     75:       if((CURLE_OK == res) && (filesize>0.0))
                     76:         printf("filesize %s: %0.0f bytes\n", filename, filesize);
                     77:     }
                     78:     else {
                     79:       /* we failed */
                     80:       fprintf(stderr, "curl told us %d\n", res);
                     81:     }
                     82: 
                     83:     /* always cleanup */
                     84:     curl_easy_cleanup(curl);
                     85:   }
                     86: 
                     87:   curl_global_cleanup();
                     88: 
                     89:   return 0;
                     90: }