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