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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) 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 #include <stdio.h>
     23 
     24 #include <curl/curl.h>
     25 
     26 /* <DESC>
     27  * Similar to ftpget.c but also stores the received response-lines
     28  * in a separate file using our own callback!
     29  * </DESC>
     30  */
     31 static size_t
     32 write_response(void *ptr, size_t size, size_t nmemb, void *data)
     33 {
     34   FILE *writehere = (FILE *)data;
     35   return fwrite(ptr, size, nmemb, writehere);
     36 }
     37 
     38 #define FTPBODY "ftp-list"
     39 #define FTPHEADERS "ftp-responses"
     40 
     41 int main(void)
     42 {
     43   CURL *curl;
     44   CURLcode res;
     45   FILE *ftpfile;
     46   FILE *respfile;
     47 
     48   /* local file name to store the file as */
     49   ftpfile = fopen(FTPBODY, "wb"); /* b is binary, needed on win32 */
     50 
     51   /* local file name to store the FTP server's response lines in */
     52   respfile = fopen(FTPHEADERS, "wb"); /* b is binary, needed on win32 */
     53 
     54   curl = curl_easy_init();
     55   if(curl) {
     56     /* Get a file listing from sunet */
     57     curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.example.com/");
     58     curl_easy_setopt(curl, CURLOPT_WRITEDATA, ftpfile);
     59     /* If you intend to use this on windows with a libcurl DLL, you must use
     60        CURLOPT_WRITEFUNCTION as well */
     61     curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, write_response);
     62     curl_easy_setopt(curl, CURLOPT_HEADERDATA, respfile);
     63     res = curl_easy_perform(curl);
     64     /* Check for errors */
     65     if(res != CURLE_OK)
     66       fprintf(stderr, "curl_easy_perform() failed: %s\n",
     67               curl_easy_strerror(res));
     68 
     69     /* always cleanup */
     70     curl_easy_cleanup(curl);
     71   }
     72 
     73   fclose(ftpfile); /* close the local file */
     74   fclose(respfile); /* close the response file */
     75 
     76   return 0;
     77 }
     78