1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 #include <stdio.h>
25
26 #include <curl/curl.h>
27
28 /* <DESC>
29 * Get a single file from an FTP server.
30 * </DESC>
31 */
32
33 struct FtpFile {
34 const char *filename;
35 FILE *stream;
36 };
37
my_fwrite(void * buffer,size_t size,size_t nmemb,void * stream)38 static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, 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 0; /* failure, cannot open file to write */
46 }
47 return fwrite(buffer, size, nmemb, out->stream);
48 }
49
50
main(void)51 int main(void)
52 {
53 CURL *curl;
54 CURLcode res;
55 struct FtpFile ftpfile = {
56 "curl.tar.gz", /* 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!
66 */
67 curl_easy_setopt(curl, CURLOPT_URL,
68 "ftp://ftp.example.com/curl/curl-7.9.2.tar.gz");
69 /* Define our callback to get called when there is data to be written */
70 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
71 /* Set a pointer to our struct to pass to the callback */
72 curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
73
74 /* Switch on full protocol/debug output */
75 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
76
77 res = curl_easy_perform(curl);
78
79 /* always cleanup */
80 curl_easy_cleanup(curl);
81
82 if(CURLE_OK != res) {
83 /* we failed */
84 fprintf(stderr, "curl told us %d\n", res);
85 }
86 }
87
88 if(ftpfile.stream)
89 fclose(ftpfile.stream); /* close the local file */
90
91 curl_global_cleanup();
92
93 return 0;
94 }
95
