curl/docs/examples/ftpgetresp.c

   1 /*****************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * $Id: ftpgetresp.c,v 1.4 2007-07-16 21:22:12 danf Exp $
   9  */
  10
  11 #include <stdio.h>
  12
  13 #include <curl/curl.h>
  14 #include <curl/types.h>
  15 #include <curl/easy.h>
  16
  17 /*
  18  * Similar to ftpget.c but this also stores the received response-lines
  19  * in a separate file using our own callback!
  20  *
  21  * This functionality was introduced in libcurl 7.9.3.
  22  */
  23
  24 static size_t
  25 write_response(void *ptr, size_t size, size_t nmemb, void *data)
  26 {
  27   FILE *writehere = (FILE *)data;
  28   return fwrite(ptr, size, nmemb, writehere);
  29 }
  30
  31 int main(int argc, char **argv)
  32 {
  33   CURL *curl;
  34   CURLcode res;
  35   FILE *ftpfile;
  36   FILE *respfile;
  37
  38   /* local file name to store the file as */
  39   ftpfile = fopen("ftp-list", "wb"); /* b is binary, needed on win32 */
  40
  41   /* local file name to store the FTP server's response lines in */
  42   respfile = fopen("ftp-responses", "wb"); /* b is binary, needed on win32 */
  43
  44   curl = curl_easy_init();
  45   if(curl) {
  46     /* Get a file listing from sunet */
  47     curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.sunet.se/");
  48     curl_easy_setopt(curl, CURLOPT_WRITEDATA, ftpfile);
  49     /* If you intend to use this on windows with a libcurl DLL, you must use
  50        CURLOPT_WRITEFUNCTION as well */
  51     curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, write_response);
  52     curl_easy_setopt(curl, CURLOPT_WRITEHEADER, respfile);
  53     res = curl_easy_perform(curl);
  54
  55     /* always cleanup */
  56     curl_easy_cleanup(curl);
  57   }
  58
  59   fclose(ftpfile); /* close the local file */
  60   fclose(respfile); /* close the response file */
  61
  62   return 0;
  63 }