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    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2017, 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:  * FTP upload a file from memory
   24:  * </DESC>
   25:  */
   26: #include <stdio.h>
   27: #include <string.h>
   28: #include <curl/curl.h>
   29: 
   30: static const char data[]=
   31:   "Lorem ipsum dolor sit amet, consectetur adipiscing elit. "
   32:   "Nam rhoncus odio id venenatis volutpat. Vestibulum dapibus "
   33:   "bibendum ullamcorper. Maecenas finibus elit augue, vel "
   34:   "condimentum odio maximus nec. In hac habitasse platea dictumst. "
   35:   "Vestibulum vel dolor et turpis rutrum finibus ac at nulla. "
   36:   "Vivamus nec neque ac elit blandit pretium vitae maximus ipsum. "
   37:   "Quisque sodales magna vel erat auctor, sed pellentesque nisi "
   38:   "rhoncus. Donec vehicula maximus pretium. Aliquam eu tincidunt "
   39:   "lorem.";
   40: 
   41: struct WriteThis {
   42:   const char *readptr;
   43:   size_t sizeleft;
   44: };
   45: 
   46: static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
   47: {
   48:   struct WriteThis *upload = (struct WriteThis *)userp;
   49:   size_t max = size*nmemb;
   50: 
   51:   if(max < 1)
   52:     return 0;
   53: 
   54:   if(upload->sizeleft) {
   55:     size_t copylen = max;
   56:     if(copylen > upload->sizeleft)
   57:       copylen = upload->sizeleft;
   58:     memcpy(ptr, upload->readptr, copylen);
   59:     upload->readptr += copylen;
   60:     upload->sizeleft -= copylen;
   61:     return copylen;
   62:   }
   63: 
   64:   return 0;                          /* no more data left to deliver */
   65: }
   66: 
   67: int main(void)
   68: {
   69:   CURL *curl;
   70:   CURLcode res;
   71: 
   72:   struct WriteThis upload;
   73: 
   74:   upload.readptr = data;
   75:   upload.sizeleft = strlen(data);
   76: 
   77:   /* In windows, this will init the winsock stuff */
   78:   res = curl_global_init(CURL_GLOBAL_DEFAULT);
   79:   /* Check for errors */
   80:   if(res != CURLE_OK) {
   81:     fprintf(stderr, "curl_global_init() failed: %s\n",
   82:             curl_easy_strerror(res));
   83:     return 1;
   84:   }
   85: 
   86:   /* get a curl handle */
   87:   curl = curl_easy_init();
   88:   if(curl) {
   89:     /* First set the URL, the target file */
   90:     curl_easy_setopt(curl, CURLOPT_URL,
   91:                      "ftp://example.com/path/to/upload/file");
   92: 
   93:     /* User and password for the FTP login */
   94:     curl_easy_setopt(curl, CURLOPT_USERPWD, "login:secret");
   95: 
   96:     /* Now specify we want to UPLOAD data */
   97:     curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
   98: 
   99:     /* we want to use our own read function */
  100:     curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
  101: 
  102:     /* pointer to pass to our read function */
  103:     curl_easy_setopt(curl, CURLOPT_READDATA, &upload);
  104: 
  105:     /* get verbose debug output please */
  106:     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
  107: 
  108:     /* Set the expected upload size. */
  109:     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
  110:                      (curl_off_t)upload.sizeleft);
  111: 
  112:     /* Perform the request, res will get the return code */
  113:     res = curl_easy_perform(curl);
  114:     /* Check for errors */
  115:     if(res != CURLE_OK)
  116:       fprintf(stderr, "curl_easy_perform() failed: %s\n",
  117:               curl_easy_strerror(res));
  118: 
  119:     /* always cleanup */
  120:     curl_easy_cleanup(curl);
  121:   }
  122:   curl_global_cleanup();
  123:   return 0;
  124: }