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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2017, 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 /* <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 }
    125