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 #include <stdio.h>
23
24 #include <curl/curl.h>
25
26 /* <DESC>
27 * Get a single file from an FTP server.
28 * </DESC>
29 */
30
31 struct FtpFile {
32 const char *filename;
33 FILE *stream;
34 };
35
my_fwrite(void * buffer,size_t size,size_t nmemb,void * stream)36 static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream)
37 {
38 struct FtpFile *out = (struct FtpFile *)stream;
39 if(!out->stream) {
40 /* open file for writing */
41 out->stream = fopen(out->filename, "wb");
42 if(!out->stream)
43 return -1; /* failure, can't open file to write */
44 }
45 return fwrite(buffer, size, nmemb, out->stream);
46 }
47
48
main(void)49 int main(void)
50 {
51 CURL *curl;
52 CURLcode res;
53 struct FtpFile ftpfile = {
54 "curl.tar.gz", /* name to store the file as if successful */
55 NULL
56 };
57
58 curl_global_init(CURL_GLOBAL_DEFAULT);
59
60 curl = curl_easy_init();
61 if(curl) {
62 /*
63 * You better replace the URL with one that works!
64 */
65 curl_easy_setopt(curl, CURLOPT_URL,
66 "ftp://ftp.example.com/curl/curl-7.9.2.tar.gz");
67 /* Define our callback to get called when there's data to be written */
68 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
69 /* Set a pointer to our struct to pass to the callback */
70 curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
71
72 /* Switch on full protocol/debug output */
73 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
74
75 res = curl_easy_perform(curl);
76
77 /* always cleanup */
78 curl_easy_cleanup(curl);
79
80 if(CURLE_OK != res) {
81 /* we failed */
82 fprintf(stderr, "curl told us %d\n", res);
83 }
84 }
85
86 if(ftpfile.stream)
87 fclose(ftpfile.stream); /* close the local file */
88
89 curl_global_cleanup();
90
91 return 0;
92 }
93