Manpages - CURLOPT_CHUNK_DATA.3

CURLOPT_CHUNK_DATA - pointer passed to the FTP chunk callbacks

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CHUNK_DATA, void *pointer);

Pass a pointer that will be untouched by libcurl and passed as the ptr argument to the CURLOPT_CHUNK_BGN_FUNCTION(3) and CURLOPT_CHUNK_END_FUNCTION(3).

NULL

FTP

  static long file_is_coming(struct curl_fileinfo *finfo,
                             struct callback_data *data,
                             int remains)
  {
    printf("%3d %40s %10luB ", remains, finfo->filename,
           (unsigned long)finfo->size);

    switch(finfo->filetype) {
    case CURLFILETYPE_DIRECTORY:
      printf(" DIR\n");
      break;
    case CURLFILETYPE_FILE:
      printf("FILE ");
      break;
    default:
      printf("OTHER\n");
      break;
    }

    if(finfo->filetype == CURLFILETYPE_FILE) {
      /* do not transfer files >= 50B */
      if(finfo->size > 50) {
        printf("SKIPPED\n");
        return CURL_CHUNK_BGN_FUNC_SKIP;
      }

      data->output = fopen(finfo->filename, "wb");
      if(!data->output) {
        return CURL_CHUNK_BGN_FUNC_FAIL;
      }
    }

    return CURL_CHUNK_BGN_FUNC_OK;
  }

  int main()
  {
    /* data for callback */
    struct callback_data callback_info;

    /* callback is called before download of concrete file started */
    curl_easy_setopt(curl, CURLOPT_CHUNK_BGN_FUNCTION, file_is_coming);
    curl_easy_setopt(curl, CURLOPT_CHUNK_DATA, &callback_info);
  }

Added in 7.21.0

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

*CURLOPT_CHUNK_BGN_FUNCTION*(3), *CURLOPT_WILDCARDMATCH*(3),