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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: /* <DESC>
   23:  * FTP wildcard pattern matching
   24:  * </DESC>
   25:  */
   26: #include <curl/curl.h>
   27: #include <stdio.h>
   28: 
   29: struct callback_data {
   30:   FILE *output;
   31: };
   32: 
   33: static long file_is_coming(struct curl_fileinfo *finfo,
   34:                            struct callback_data *data,
   35:                            int remains);
   36: 
   37: static long file_is_downloaded(struct callback_data *data);
   38: 
   39: static size_t write_it(char *buff, size_t size, size_t nmemb,
   40:                        void *cb_data);
   41: 
   42: int main(int argc, char **argv)
   43: {
   44:   /* curl easy handle */
   45:   CURL *handle;
   46: 
   47:   /* help data */
   48:   struct callback_data data = { 0 };
   49: 
   50:   /* global initialization */
   51:   int rc = curl_global_init(CURL_GLOBAL_ALL);
   52:   if(rc)
   53:     return rc;
   54: 
   55:   /* initialization of easy handle */
   56:   handle = curl_easy_init();
   57:   if(!handle) {
   58:     curl_global_cleanup();
   59:     return CURLE_OUT_OF_MEMORY;
   60:   }
   61: 
   62:   /* turn on wildcard matching */
   63:   curl_easy_setopt(handle, CURLOPT_WILDCARDMATCH, 1L);
   64: 
   65:   /* callback is called before download of concrete file started */
   66:   curl_easy_setopt(handle, CURLOPT_CHUNK_BGN_FUNCTION, file_is_coming);
   67: 
   68:   /* callback is called after data from the file have been transferred */
   69:   curl_easy_setopt(handle, CURLOPT_CHUNK_END_FUNCTION, file_is_downloaded);
   70: 
   71:   /* this callback will write contents into files */
   72:   curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write_it);
   73: 
   74:   /* put transfer data into callbacks */
   75:   curl_easy_setopt(handle, CURLOPT_CHUNK_DATA, &data);
   76:   curl_easy_setopt(handle, CURLOPT_WRITEDATA, &data);
   77: 
   78:   /* curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L); */
   79: 
   80:   /* set an URL containing wildcard pattern (only in the last part) */
   81:   if(argc == 2)
   82:     curl_easy_setopt(handle, CURLOPT_URL, argv[1]);
   83:   else
   84:     curl_easy_setopt(handle, CURLOPT_URL, "ftp://example.com/test/*");
   85: 
   86:   /* and start transfer! */
   87:   rc = curl_easy_perform(handle);
   88: 
   89:   curl_easy_cleanup(handle);
   90:   curl_global_cleanup();
   91:   return rc;
   92: }
   93: 
   94: static long file_is_coming(struct curl_fileinfo *finfo,
   95:                            struct callback_data *data,
   96:                            int remains)
   97: {
   98:   printf("%3d %40s %10luB ", remains, finfo->filename,
   99:          (unsigned long)finfo->size);
  100: 
  101:   switch(finfo->filetype) {
  102:   case CURLFILETYPE_DIRECTORY:
  103:     printf(" DIR\n");
  104:     break;
  105:   case CURLFILETYPE_FILE:
  106:     printf("FILE ");
  107:     break;
  108:   default:
  109:     printf("OTHER\n");
  110:     break;
  111:   }
  112: 
  113:   if(finfo->filetype == CURLFILETYPE_FILE) {
  114:     /* do not transfer files >= 50B */
  115:     if(finfo->size > 50) {
  116:       printf("SKIPPED\n");
  117:       return CURL_CHUNK_BGN_FUNC_SKIP;
  118:     }
  119: 
  120:     data->output = fopen(finfo->filename, "wb");
  121:     if(!data->output) {
  122:       return CURL_CHUNK_BGN_FUNC_FAIL;
  123:     }
  124:   }
  125: 
  126:   return CURL_CHUNK_BGN_FUNC_OK;
  127: }
  128: 
  129: static long file_is_downloaded(struct callback_data *data)
  130: {
  131:   if(data->output) {
  132:     printf("DOWNLOADED\n");
  133:     fclose(data->output);
  134:     data->output = 0x0;
  135:   }
  136:   return CURL_CHUNK_END_FUNC_OK;
  137: }
  138: 
  139: static size_t write_it(char *buff, size_t size, size_t nmemb,
  140:                        void *cb_data)
  141: {
  142:   struct callback_data *data = cb_data;
  143:   size_t written = 0;
  144:   if(data->output)
  145:     written = fwrite(buff, size, nmemb, data->output);
  146:   else
  147:     /* listing output */
  148:     written = fwrite(buff, size, nmemb, stdout);
  149:   return written;
  150: }