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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
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      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2012, 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 http://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 /*
     28  * This is an example showing how to get a single file from an FTPS server.
     29  * It delays the actual destination file creation until the first write
     30  * callback so that it won't create an empty file in case the remote file
     31  * doesn't exist or something else fails.
     32  */
     33 
     34 struct FtpFile {
     35   const char *filename;
     36   FILE *stream;
     37 };
     38 
     39 static size_t my_fwrite(void *buffer, size_t size, size_t nmemb,
     40                         void *stream)
     41 {
     42   struct FtpFile *out=(struct FtpFile *)stream;
     43   if(out && !out->stream) {
     44     /* open file for writing */
     45     out->stream=fopen(out->filename, "wb");
     46     if(!out->stream)
     47       return -1; /* failure, can't open file to write */
     48   }
     49   return fwrite(buffer, size, nmemb, out->stream);
     50 }
     51 
     52 
     53 int main(void)
     54 {
     55   CURL *curl;
     56   CURLcode res;
     57   struct FtpFile ftpfile={
     58     "yourfile.bin", /* name to store the file as if successful */
     59     NULL
     60   };
     61 
     62   curl_global_init(CURL_GLOBAL_DEFAULT);
     63 
     64   curl = curl_easy_init();
     65   if(curl) {
     66     /*
     67      * You better replace the URL with one that works! Note that we use an
     68      * FTP:// URL with standard explicit FTPS. You can also do FTPS:// URLs if
     69      * you want to do the rarer kind of transfers: implicit.
     70      */
     71     curl_easy_setopt(curl, CURLOPT_URL,
     72                      "ftp://user@server/home/user/file.txt");
     73     /* Define our callback to get called when there's data to be written */
     74     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
     75     /* Set a pointer to our struct to pass to the callback */
     76     curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
     77 
     78     /* We activate SSL and we require it for both control and data */
     79     curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
     80 
     81     /* Switch on full protocol/debug output */
     82     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
     83 
     84     res = curl_easy_perform(curl);
     85 
     86     /* always cleanup */
     87     curl_easy_cleanup(curl);
     88 
     89     if(CURLE_OK != res) {
     90       /* we failed */
     91       fprintf(stderr, "curl told us %d\n", res);
     92     }
     93   }
     94 
     95   if(ftpfile.stream)
     96     fclose(ftpfile.stream); /* close the local file */
     97 
     98   curl_global_cleanup();
     99 
    100   return 0;
    101 }
    102