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Annotation of embedaddon/curl/docs/examples/ftp-wildcard.c, revision 1.1.1.1

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: /* <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: }