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 #include <string.h>
26
27 #include <curl/curl.h>
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #include <fcntl.h>
31 #include <errno.h>
32 #ifdef _WIN32
33 #include <io.h>
34 #undef stat
35 #define stat _stat
36 #else
37 #include <unistd.h>
38 #endif
39
40 /* <DESC>
41 * Performs an FTP upload and renames the file just after a successful
42 * transfer.
43 * </DESC>
44 */
45
46 #define LOCAL_FILE "/tmp/uploadthis.txt"
47 #define UPLOAD_FILE_AS "while-uploading.txt"
48 #define REMOTE_URL "ftp://example.com/" UPLOAD_FILE_AS
49 #define RENAME_FILE_TO "renamed-and-fine.txt"
50
51 /* NOTE: if you want this example to work on Windows with libcurl as a DLL,
52 you MUST also provide a read callback with CURLOPT_READFUNCTION. Failing to
53 do so might give you a crash since a DLL may not use the variable's memory
54 when passed in to it from an app like this. */
read_callback(char * ptr,size_t size,size_t nmemb,void * stream)55 static size_t read_callback(char *ptr, size_t size, size_t nmemb, void *stream)
56 {
57 unsigned long nread;
58 /* in real-world cases, this would probably get this data differently
59 as this fread() stuff is exactly what the library already would do
60 by default internally */
61 size_t retcode = fread(ptr, size, nmemb, stream);
62
63 if(retcode > 0) {
64 nread = (unsigned long)retcode;
65 fprintf(stderr, "*** We read %lu bytes from file\n", nread);
66 }
67
68 return retcode;
69 }
70
main(void)71 int main(void)
72 {
73 CURL *curl;
74 CURLcode res;
75 FILE *hd_src;
76 struct stat file_info;
77 unsigned long fsize;
78
79 struct curl_slist *headerlist = NULL;
80 static const char buf_1 [] = "RNFR " UPLOAD_FILE_AS;
81 static const char buf_2 [] = "RNTO " RENAME_FILE_TO;
82
83 /* get the file size of the local file */
84 if(stat(LOCAL_FILE, &file_info)) {
85 printf("Couldn't open '%s': %s\n", LOCAL_FILE, strerror(errno));
86 return 1;
87 }
88 fsize = (unsigned long)file_info.st_size;
89
90 printf("Local file size: %lu bytes.\n", fsize);
91
92 /* get a FILE * of the same file */
93 hd_src = fopen(LOCAL_FILE, "rb");
94
95 /* In Windows, this inits the Winsock stuff */
96 curl_global_init(CURL_GLOBAL_ALL);
97
98 /* get a curl handle */
99 curl = curl_easy_init();
100 if(curl) {
101 /* build a list of commands to pass to libcurl */
102 headerlist = curl_slist_append(headerlist, buf_1);
103 headerlist = curl_slist_append(headerlist, buf_2);
104
105 /* we want to use our own read function */
106 curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
107
108 /* enable uploading */
109 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
110
111 /* specify target */
112 curl_easy_setopt(curl, CURLOPT_URL, REMOTE_URL);
113
114 /* pass in that last of FTP commands to run after the transfer */
115 curl_easy_setopt(curl, CURLOPT_POSTQUOTE, headerlist);
116
117 /* now specify which file to upload */
118 curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);
119
120 /* Set the size of the file to upload (optional). If you give a *_LARGE
121 option you MUST make sure that the type of the passed-in argument is a
122 curl_off_t. If you use CURLOPT_INFILESIZE (without _LARGE) you must
123 make sure that to pass in a type 'long' argument. */
124 curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
125 (curl_off_t)fsize);
126
127 /* Now run off and do what you have been told! */
128 res = curl_easy_perform(curl);
129 /* Check for errors */
130 if(res != CURLE_OK)
131 fprintf(stderr, "curl_easy_perform() failed: %s\n",
132 curl_easy_strerror(res));
133
134 /* clean up the FTP commands list */
135 curl_slist_free_all(headerlist);
136
137 /* always cleanup */
138 curl_easy_cleanup(curl);
139 }
140 fclose(hd_src); /* close the local file */
141
142 curl_global_cleanup();
143 return 0;
144 }
145
