quickjs-tart

quickjs-based runtime for wallet-core logic
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ftpgetinfo.c (2990B)

      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 
     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 
     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 }