Return to ftpupload.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / docs / examples

curl

    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2019, 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: #include <stdio.h>
   23: #include <string.h>
   24: 
   25: #include <curl/curl.h>
   26: #include <sys/types.h>
   27: #include <sys/stat.h>
   28: #include <fcntl.h>
   29: #include <errno.h>
   30: #ifdef WIN32
   31: #include <io.h>
   32: #else
   33: #include <unistd.h>
   34: #endif
   35: 
   36: /* <DESC>
   37:  * Performs an FTP upload and renames the file just after a successful
   38:  * transfer.
   39:  * </DESC>
   40:  */
   41: 
   42: #define LOCAL_FILE      "/tmp/uploadthis.txt"
   43: #define UPLOAD_FILE_AS  "while-uploading.txt"
   44: #define REMOTE_URL      "ftp://example.com/"  UPLOAD_FILE_AS
   45: #define RENAME_FILE_TO  "renamed-and-fine.txt"
   46: 
   47: /* NOTE: if you want this example to work on Windows with libcurl as a
   48:    DLL, you MUST also provide a read callback with CURLOPT_READFUNCTION.
   49:    Failing to do so will give you a crash since a DLL may not use the
   50:    variable's memory when passed in to it from an app like this. */
   51: static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream)
   52: {
   53:   curl_off_t nread;
   54:   /* in real-world cases, this would probably get this data differently
   55:      as this fread() stuff is exactly what the library already would do
   56:      by default internally */
   57:   size_t retcode = fread(ptr, size, nmemb, stream);
   58: 
   59:   nread = (curl_off_t)retcode;
   60: 
   61:   fprintf(stderr, "*** We read %" CURL_FORMAT_CURL_OFF_T
   62:           " bytes from file\n", nread);
   63:   return retcode;
   64: }
   65: 
   66: int main(void)
   67: {
   68:   CURL *curl;
   69:   CURLcode res;
   70:   FILE *hd_src;
   71:   struct stat file_info;
   72:   curl_off_t fsize;
   73: 
   74:   struct curl_slist *headerlist = NULL;
   75:   static const char buf_1 [] = "RNFR " UPLOAD_FILE_AS;
   76:   static const char buf_2 [] = "RNTO " RENAME_FILE_TO;
   77: 
   78:   /* get the file size of the local file */
   79:   if(stat(LOCAL_FILE, &file_info)) {
   80:     printf("Couldn't open '%s': %s\n", LOCAL_FILE, strerror(errno));
   81:     return 1;
   82:   }
   83:   fsize = (curl_off_t)file_info.st_size;
   84: 
   85:   printf("Local file size: %" CURL_FORMAT_CURL_OFF_T " bytes.\n", fsize);
   86: 
   87:   /* get a FILE * of the same file */
   88:   hd_src = fopen(LOCAL_FILE, "rb");
   89: 
   90:   /* In windows, this will init the winsock stuff */
   91:   curl_global_init(CURL_GLOBAL_ALL);
   92: 
   93:   /* get a curl handle */
   94:   curl = curl_easy_init();
   95:   if(curl) {
   96:     /* build a list of commands to pass to libcurl */
   97:     headerlist = curl_slist_append(headerlist, buf_1);
   98:     headerlist = curl_slist_append(headerlist, buf_2);
   99: 
  100:     /* we want to use our own read function */
  101:     curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
  102: 
  103:     /* enable uploading */
  104:     curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
  105: 
  106:     /* specify target */
  107:     curl_easy_setopt(curl, CURLOPT_URL, REMOTE_URL);
  108: 
  109:     /* pass in that last of FTP commands to run after the transfer */
  110:     curl_easy_setopt(curl, CURLOPT_POSTQUOTE, headerlist);
  111: 
  112:     /* now specify which file to upload */
  113:     curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);
  114: 
  115:     /* Set the size of the file to upload (optional).  If you give a *_LARGE
  116:        option you MUST make sure that the type of the passed-in argument is a
  117:        curl_off_t. If you use CURLOPT_INFILESIZE (without _LARGE) you must
  118:        make sure that to pass in a type 'long' argument. */
  119:     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
  120:                      (curl_off_t)fsize);
  121: 
  122:     /* Now run off and do what you've been told! */
  123:     res = curl_easy_perform(curl);
  124:     /* Check for errors */
  125:     if(res != CURLE_OK)
  126:       fprintf(stderr, "curl_easy_perform() failed: %s\n",
  127:               curl_easy_strerror(res));
  128: 
  129:     /* clean up the FTP commands list */
  130:     curl_slist_free_all(headerlist);
  131: 
  132:     /* always cleanup */
  133:     curl_easy_cleanup(curl);
  134:   }
  135:   fclose(hd_src); /* close the local file */
  136: 
  137:   curl_global_cleanup();
  138:   return 0;
  139: }