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 /* <DESC>
25 * FTP upload a file from memory
26 * </DESC>
27 */
28 #include <stdio.h>
29 #include <string.h>
30 #include <curl/curl.h>
31
32 static const char data[]=
33 "Lorem ipsum dolor sit amet, consectetur adipiscing elit. "
34 "Nam rhoncus odio id venenatis volutpat. Vestibulum dapibus "
35 "bibendum ullamcorper. Maecenas finibus elit augue, vel "
36 "condimentum odio maximus nec. In hac habitasse platea dictumst. "
37 "Vestibulum vel dolor et turpis rutrum finibus ac at nulla. "
38 "Vivamus nec neque ac elit blandit pretium vitae maximus ipsum. "
39 "Quisque sodales magna vel erat auctor, sed pellentesque nisi "
40 "rhoncus. Donec vehicula maximus pretium. Aliquam eu tincidunt "
41 "lorem.";
42
43 struct WriteThis {
44 const char *readptr;
45 size_t sizeleft;
46 };
47
read_callback(char * ptr,size_t size,size_t nmemb,void * userp)48 static size_t read_callback(char *ptr, size_t size, size_t nmemb, void *userp)
49 {
50 struct WriteThis *upload = (struct WriteThis *)userp;
51 size_t max = size*nmemb;
52
53 if(max < 1)
54 return 0;
55
56 if(upload->sizeleft) {
57 size_t copylen = max;
58 if(copylen > upload->sizeleft)
59 copylen = upload->sizeleft;
60 memcpy(ptr, upload->readptr, copylen);
61 upload->readptr += copylen;
62 upload->sizeleft -= copylen;
63 return copylen;
64 }
65
66 return 0; /* no more data left to deliver */
67 }
68
main(void)69 int main(void)
70 {
71 CURL *curl;
72 CURLcode res;
73
74 struct WriteThis upload;
75
76 upload.readptr = data;
77 upload.sizeleft = strlen(data);
78
79 /* In Windows, this inits the Winsock stuff */
80 res = curl_global_init(CURL_GLOBAL_DEFAULT);
81 /* Check for errors */
82 if(res != CURLE_OK) {
83 fprintf(stderr, "curl_global_init() failed: %s\n",
84 curl_easy_strerror(res));
85 return 1;
86 }
87
88 /* get a curl handle */
89 curl = curl_easy_init();
90 if(curl) {
91 /* First set the URL, the target file */
92 curl_easy_setopt(curl, CURLOPT_URL,
93 "ftp://example.com/path/to/upload/file");
94
95 /* User and password for the FTP login */
96 curl_easy_setopt(curl, CURLOPT_USERPWD, "login:secret");
97
98 /* Now specify we want to UPLOAD data */
99 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
100
101 /* we want to use our own read function */
102 curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
103
104 /* pointer to pass to our read function */
105 curl_easy_setopt(curl, CURLOPT_READDATA, &upload);
106
107 /* get verbose debug output please */
108 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
109
110 /* Set the expected upload size. */
111 curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
112 (curl_off_t)upload.sizeleft);
113
114 /* Perform the request, res gets the return code */
115 res = curl_easy_perform(curl);
116 /* Check for errors */
117 if(res != CURLE_OK)
118 fprintf(stderr, "curl_easy_perform() failed: %s\n",
119 curl_easy_strerror(res));
120
121 /* always cleanup */
122 curl_easy_cleanup(curl);
123 }
124 curl_global_cleanup();
125 return 0;
126 }
127
