aboutsummaryrefslogtreecommitdiff
path: root/docs/examples/ftp-wildcard.c
blob: 7787003ca132b78965994700305429d0a1c2b94e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/
/* <DESC>
 * FTP wildcard pattern matching
 * </DESC>
 */
#include <curl/curl.h>
#include <stdio.h>

struct callback_data {
  FILE *output;
};

static long file_is_coming(struct curl_fileinfo *finfo,
                           struct callback_data *data,
                           int remains);

static long file_is_downloaded(struct callback_data *data);

static size_t write_it(char *buff, size_t size, size_t nmemb,
                       void *cb_data);

int main(int argc, char **argv)
{
  int rc = CURLE_OK;

  /* curl easy handle */
  CURL *handle;

  /* help data */
  struct callback_data data = { 0 };

  /* global initialization */
  rc = curl_global_init(CURL_GLOBAL_ALL);
  if(rc)
    return rc;

  /* initialization of easy handle */
  handle = curl_easy_init();
  if(!handle) {
    curl_global_cleanup();
    return CURLE_OUT_OF_MEMORY;
  }

  /* turn on wildcard matching */
  curl_easy_setopt(handle, CURLOPT_WILDCARDMATCH, 1L);

  /* callback is called before download of concrete file started */
  curl_easy_setopt(handle, CURLOPT_CHUNK_BGN_FUNCTION, file_is_coming);

  /* callback is called after data from the file have been transferred */
  curl_easy_setopt(handle, CURLOPT_CHUNK_END_FUNCTION, file_is_downloaded);

  /* this callback will write contents into files */
  curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write_it);

  /* put transfer data into callbacks */
  curl_easy_setopt(handle, CURLOPT_CHUNK_DATA, &data);
  curl_easy_setopt(handle, CURLOPT_WRITEDATA, &data);

  /* curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L); */

  /* set an URL containing wildcard pattern (only in the last part) */
  if(argc == 2)
    curl_easy_setopt(handle, CURLOPT_URL, argv[1]);
  else
    curl_easy_setopt(handle, CURLOPT_URL, "ftp://example.com/test/*");

  /* and start transfer! */
  rc = curl_easy_perform(handle);

  curl_easy_cleanup(handle);
  curl_global_cleanup();
  return rc;
}

static long file_is_coming(struct curl_fileinfo *finfo,
                           struct callback_data *data,
                           int remains)
{
  printf("%3d %40s %10luB ", remains, finfo->filename,
         (unsigned long)finfo->size);

  switch(finfo->filetype) {
  case CURLFILETYPE_DIRECTORY:
    printf(" DIR\n");
    break;
  case CURLFILETYPE_FILE:
    printf("FILE ");
    break;
  default:
    printf("OTHER\n");
    break;
  }

  if(finfo->filetype == CURLFILETYPE_FILE) {
    /* do not transfer files >= 50B */
    if(finfo->size > 50) {
      printf("SKIPPED\n");
      return CURL_CHUNK_BGN_FUNC_SKIP;
    }

    data->output = fopen(finfo->filename, "w");
    if(!data->output) {
      return CURL_CHUNK_BGN_FUNC_FAIL;
    }
  }

  return CURL_CHUNK_BGN_FUNC_OK;
}

static long file_is_downloaded(struct callback_data *data)
{
  if(data->output) {
    printf("DOWNLOADED\n");
    fclose(data->output);
    data->output = 0x0;
  }
  return CURL_CHUNK_END_FUNC_OK;
}

static size_t write_it(char *buff, size_t size, size_t nmemb,
                       void *cb_data)
{
  struct callback_data *data = cb_data;
  size_t written = 0;
  if(data->output)
    written = fwrite(buff, size, nmemb, data->output);
  else
    /* listing output */
    written = fwrite(buff, size, nmemb, stdout);
  return written;
}