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    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: 
   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->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: }