lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
| 8 | * Copyright (C) 1998 - 2016, 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 | /* <DESC> |
| 23 | * Gets a file using an SFTP URL. |
| 24 | * </DESC> |
| 25 | */ |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | |
| 29 | #include <curl/curl.h> |
| 30 | |
| 31 | /* define this to switch off the use of ssh-agent in this program */ |
| 32 | #undef DISABLE_SSH_AGENT |
| 33 | |
| 34 | /* |
| 35 | * This is an example showing how to get a single file from an SFTP server. |
| 36 | * It delays the actual destination file creation until the first write |
| 37 | * callback so that it won't create an empty file in case the remote file |
| 38 | * doesn't exist or something else fails. |
| 39 | */ |
| 40 | |
| 41 | struct FtpFile { |
| 42 | const char *filename; |
| 43 | FILE *stream; |
| 44 | }; |
| 45 | |
| 46 | static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, |
| 47 | void *stream) |
| 48 | { |
| 49 | struct FtpFile *out=(struct FtpFile *)stream; |
| 50 | if(out && !out->stream) { |
| 51 | /* open file for writing */ |
| 52 | out->stream=fopen(out->filename, "wb"); |
| 53 | if(!out->stream) |
| 54 | return -1; /* failure, can't open file to write */ |
| 55 | } |
| 56 | return fwrite(buffer, size, nmemb, out->stream); |
| 57 | } |
| 58 | |
| 59 | |
| 60 | int main(void) |
| 61 | { |
| 62 | CURL *curl; |
| 63 | CURLcode res; |
| 64 | struct FtpFile ftpfile={ |
| 65 | "yourfile.bin", /* name to store the file as if successful */ |
| 66 | NULL |
| 67 | }; |
| 68 | |
| 69 | curl_global_init(CURL_GLOBAL_DEFAULT); |
| 70 | |
| 71 | curl = curl_easy_init(); |
| 72 | if(curl) { |
| 73 | /* |
| 74 | * You better replace the URL with one that works! |
| 75 | */ |
| 76 | curl_easy_setopt(curl, CURLOPT_URL, |
| 77 | "sftp://user@server/home/user/file.txt"); |
| 78 | /* Define our callback to get called when there's data to be written */ |
| 79 | curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite); |
| 80 | /* Set a pointer to our struct to pass to the callback */ |
| 81 | curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile); |
| 82 | |
| 83 | #ifndef DISABLE_SSH_AGENT |
| 84 | /* We activate ssh agent. For this to work you need |
| 85 | to have ssh-agent running (type set | grep SSH_AGENT to check) or |
| 86 | pageant on Windows (there is an icon in systray if so) */ |
| 87 | curl_easy_setopt(curl, CURLOPT_SSH_AUTH_TYPES, CURLSSH_AUTH_AGENT); |
| 88 | #endif |
| 89 | |
| 90 | /* Switch on full protocol/debug output */ |
| 91 | curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); |
| 92 | |
| 93 | res = curl_easy_perform(curl); |
| 94 | |
| 95 | /* always cleanup */ |
| 96 | curl_easy_cleanup(curl); |
| 97 | |
| 98 | if(CURLE_OK != res) { |
| 99 | /* we failed */ |
| 100 | fprintf(stderr, "curl told us %d\n", res); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | if(ftpfile.stream) |
| 105 | fclose(ftpfile.stream); /* close the local file */ |
| 106 | |
| 107 | curl_global_cleanup(); |
| 108 | |
| 109 | return 0; |
| 110 | } |