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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2015, 2017, Daniel Stenberg, <daniel (at) 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 
     23 #include <stdio.h>
     24 
     25 #include <curl/curl.h>
     26 
     27 /* <DESC>
     28  * Get a single file from an FTPS server.
     29  * </DESC>
     30  */
     31 
     32 struct FtpFile {
     33   const char *filename;
     34   FILE *stream;
     35 };
     36 
     37 static size_t my_fwrite(void *buffer, size_t size, size_t nmemb,
     38                         void *stream)
     39 {
     40   struct FtpFile *out = (struct FtpFile *)stream;
     41   if(out && !out->stream) {
     42     /* open file for writing */
     43     out->stream = fopen(out->filename, "wb");
     44     if(!out->stream)
     45       return -1; /* failure, can't open file to write */
     46   }
     47   return fwrite(buffer, size, nmemb, out->stream);
     48 }
     49 
     50 
     51 int main(void)
     52 {
     53   CURL *curl;
     54   CURLcode res;
     55   struct FtpFile ftpfile = {
     56     "yourfile.bin", /* name to store the file as if successful */
     57     NULL
     58   };
     59 
     60   curl_global_init(CURL_GLOBAL_DEFAULT);
     61 
     62   curl = curl_easy_init();
     63   if(curl) {
     64     /*
     65      * You better replace the URL with one that works! Note that we use an
     66      * FTP:// URL with standard explicit FTPS. You can also do FTPS:// URLs if
     67      * you want to do the rarer kind of transfers: implicit.
     68      */
     69     curl_easy_setopt(curl, CURLOPT_URL,
     70                      "ftp://user@server/home/user/file.txt");
     71     /* Define our callback to get called when there's data to be written */
     72     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
     73     /* Set a pointer to our struct to pass to the callback */
     74     curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
     75 
     76     /* We activate SSL and we require it for both control and data */
     77     curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
     78 
     79     /* Switch on full protocol/debug output */
     80     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
     81 
     82     res = curl_easy_perform(curl);
     83 
     84     /* always cleanup */
     85     curl_easy_cleanup(curl);
     86 
     87     if(CURLE_OK != res) {
     88       /* we failed */
     89       fprintf(stderr, "curl told us %d\n", res);
     90     }
     91   }
     92 
     93   if(ftpfile.stream)
     94     fclose(ftpfile.stream); /* close the local file */
     95 
     96   curl_global_cleanup();
     97 
     98   return 0;
     99 }
    100