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Annotation of embedaddon/curl/docs/examples/ftpsget.c, revision 1.1.1.1

1.1       misho       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: 
                     23: #include <stdio.h>
                     24: 
                     25: #include <curl/curl.h>
                     26: 
                     27: /* <DESC>
                     28:  * Get a single file from an FTPS server.
                     29:  * </DESC>
                     30:  */
                     31: 
                     32: struct FtpFile {
                     33:   const char *filename;
                     34:   FILE *stream;
                     35: };
                     36: 
                     37: static size_t my_fwrite(void *buffer, size_t size, size_t nmemb,
                     38:                         void *stream)
                     39: {
                     40:   struct FtpFile *out = (struct FtpFile *)stream;
                     41:   if(!out->stream) {
                     42:     /* open file for writing */
                     43:     out->stream = fopen(out->filename, "wb");
                     44:     if(!out->stream)
                     45:       return -1; /* failure, can't open file to write */
                     46:   }
                     47:   return fwrite(buffer, size, nmemb, out->stream);
                     48: }
                     49: 
                     50: 
                     51: int main(void)
                     52: {
                     53:   CURL *curl;
                     54:   CURLcode res;
                     55:   struct FtpFile ftpfile = {
                     56:     "yourfile.bin", /* name to store the file as if successful */
                     57:     NULL
                     58:   };
                     59: 
                     60:   curl_global_init(CURL_GLOBAL_DEFAULT);
                     61: 
                     62:   curl = curl_easy_init();
                     63:   if(curl) {
                     64:     /*
                     65:      * You better replace the URL with one that works! Note that we use an
                     66:      * FTP:// URL with standard explicit FTPS. You can also do FTPS:// URLs if
                     67:      * you want to do the rarer kind of transfers: implicit.
                     68:      */
                     69:     curl_easy_setopt(curl, CURLOPT_URL,
                     70:                      "ftp://user@server/home/user/file.txt");
                     71:     /* Define our callback to get called when there's data to be written */
                     72:     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
                     73:     /* Set a pointer to our struct to pass to the callback */
                     74:     curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
                     75: 
                     76:     /* We activate SSL and we require it for both control and data */
                     77:     curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
                     78: 
                     79:     /* Switch on full protocol/debug output */
                     80:     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
                     81: 
                     82:     res = curl_easy_perform(curl);
                     83: 
                     84:     /* always cleanup */
                     85:     curl_easy_cleanup(curl);
                     86: 
                     87:     if(CURLE_OK != res) {
                     88:       /* we failed */
                     89:       fprintf(stderr, "curl told us %d\n", res);
                     90:     }
                     91:   }
                     92: 
                     93:   if(ftpfile.stream)
                     94:     fclose(ftpfile.stream); /* close the local file */
                     95: 
                     96:   curl_global_cleanup();
                     97: 
                     98:   return 0;
                     99: }