CMakeLua/Utilities/cmcurl-7.19.0/docs/examples/ftpget.c

   1 /*****************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * $Id: ftpget.c,v 1.1.1.1 2008-09-23 16:32:05 hoffman 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  * This is an example showing how to get a single file from an FTP server.
  19  * It delays the actual destination file creation until the first write
  20  * callback so that it won't create an empty file in case the remote file
  21  * doesn't exist or something else fails.
  22  */
  23
  24 struct FtpFile {
  25   const char *filename;
  26   FILE *stream;
  27 };
  28
  29 static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream)
  30 {
  31   struct FtpFile *out=(struct FtpFile *)stream;
  32   if(out && !out->stream) {
  33     /* open file for writing */
  34     out->stream=fopen(out->filename, "wb");
  35     if(!out->stream)
  36       return -1; /* failure, can't open file to write */
  37   }
  38   return fwrite(buffer, size, nmemb, out->stream);
  39 }
  40
  41
  42 int main(void)
  43 {
  44   CURL *curl;
  45   CURLcode res;
  46   struct FtpFile ftpfile={
  47     "curl.tar.gz", /* name to store the file as if succesful */
  48     NULL
  49   };
  50
  51   curl_global_init(CURL_GLOBAL_DEFAULT);
  52
  53   curl = curl_easy_init();
  54   if(curl) {
  55     /*
  56      * Get curl 7.9.2 from sunet.se's FTP site. curl 7.9.2 is most likely not
  57      * present there by the time you read this, so you'd better replace the
  58      * URL with one that works!
  59      */
  60     curl_easy_setopt(curl, CURLOPT_URL,
  61                      "ftp://ftp.sunet.se/pub/www/utilities/curl/curl-7.9.2.tar.gz");
  62     /* Define our callback to get called when there's data to be written */
  63     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
  64     /* Set a pointer to our struct to pass to the callback */
  65     curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
  66
  67     /* Switch on full protocol/debug output */
  68     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
  69
  70     res = curl_easy_perform(curl);
  71
  72     /* always cleanup */
  73     curl_easy_cleanup(curl);
  74
  75     if(CURLE_OK != res) {
  76       /* we failed */
  77       fprintf(stderr, "curl told us %d\n", res);
  78     }
  79   }
  80
  81   if(ftpfile.stream)
  82     fclose(ftpfile.stream); /* close the local file */
  83
  84   curl_global_cleanup();
  85
  86   return 0;
  87 }