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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2012, 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 http://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 /*
     37  * This example shows an FTP upload, with a rename of the file just after
     38  * a successful upload.
     39  *
     40  * Example based on source code provided by Erick Nuwendam. Thanks!
     41  */
     42 
     43 #define LOCAL_FILE      "/tmp/uploadthis.txt"
     44 #define UPLOAD_FILE_AS  "while-uploading.txt"
     45 #define REMOTE_URL      "ftp://example.com/"  UPLOAD_FILE_AS
     46 #define RENAME_FILE_TO  "renamed-and-fine.txt"
     47 
     48 /* NOTE: if you want this example to work on Windows with libcurl as a
     49    DLL, you MUST also provide a read callback with CURLOPT_READFUNCTION.
     50    Failing to do so will give you a crash since a DLL may not use the
     51    variable's memory when passed in to it from an app like this. */
     52 static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream)
     53 {
     54   curl_off_t nread;
     55   /* in real-world cases, this would probably get this data differently
     56      as this fread() stuff is exactly what the library already would do
     57      by default internally */
     58   size_t retcode = fread(ptr, size, nmemb, stream);
     59 
     60   nread = (curl_off_t)retcode;
     61 
     62   fprintf(stderr, "*** We read %" CURL_FORMAT_CURL_OFF_T
     63           " bytes from file\n", nread);
     64   return retcode;
     65 }
     66 
     67 int main(void)
     68 {
     69   CURL *curl;
     70   CURLcode res;
     71   FILE *hd_src;
     72   struct stat file_info;
     73   curl_off_t fsize;
     74 
     75   struct curl_slist *headerlist=NULL;
     76   static const char buf_1 [] = "RNFR " UPLOAD_FILE_AS;
     77   static const char buf_2 [] = "RNTO " RENAME_FILE_TO;
     78 
     79   /* get the file size of the local file */
     80   if(stat(LOCAL_FILE, &file_info)) {
     81     printf("Couldnt open '%s': %s\n", LOCAL_FILE, strerror(errno));
     82     return 1;
     83   }
     84   fsize = (curl_off_t)file_info.st_size;
     85 
     86   printf("Local file size: %" CURL_FORMAT_CURL_OFF_T " bytes.\n", fsize);
     87 
     88   /* get a FILE * of the same file */
     89   hd_src = fopen(LOCAL_FILE, "rb");
     90 
     91   /* In windows, this will init the winsock stuff */
     92   curl_global_init(CURL_GLOBAL_ALL);
     93 
     94   /* get a curl handle */
     95   curl = curl_easy_init();
     96   if(curl) {
     97     /* build a list of commands to pass to libcurl */
     98     headerlist = curl_slist_append(headerlist, buf_1);
     99     headerlist = curl_slist_append(headerlist, buf_2);
    100 
    101     /* we want to use our own read function */
    102     curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
    103 
    104     /* enable uploading */
    105     curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
    106 
    107     /* specify target */
    108     curl_easy_setopt(curl,CURLOPT_URL, REMOTE_URL);
    109 
    110     /* pass in that last of FTP commands to run after the transfer */
    111     curl_easy_setopt(curl, CURLOPT_POSTQUOTE, headerlist);
    112 
    113     /* now specify which file to upload */
    114     curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);
    115 
    116     /* Set the size of the file to upload (optional).  If you give a *_LARGE
    117        option you MUST make sure that the type of the passed-in argument is a
    118        curl_off_t. If you use CURLOPT_INFILESIZE (without _LARGE) you must
    119        make sure that to pass in a type 'long' argument. */
    120     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
    121                      (curl_off_t)fsize);
    122 
    123     /* Now run off and do what you've been told! */
    124     res = curl_easy_perform(curl);
    125     /* Check for errors */
    126     if(res != CURLE_OK)
    127       fprintf(stderr, "curl_easy_perform() failed: %s\n",
    128               curl_easy_strerror(res));
    129 
    130     /* clean up the FTP commands list */
    131     curl_slist_free_all (headerlist);
    132 
    133     /* always cleanup */
    134     curl_easy_cleanup(curl);
    135   }
    136   fclose(hd_src); /* close the local file */
    137 
    138   curl_global_cleanup();
    139   return 0;
    140 }
    141