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