CURLOPT_CHUNK_DATA(3) Library Functions Manual CURLOPT_CHUNK_DATA(3)
NAME
CURLOPT_CHUNK_DATA - pointer passed to the FTP chunk callbacks
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CHUNK_DATA, void *pointer);
DESCRIPTION
Pass a pointer that is untouched by libcurl and passed as the ptr
argument to the CURLOPT_CHUNK_BGN_FUNCTION(3) and
CURLOPT_CHUNK_END_FUNCTION(3).
DEFAULT
NULL
PROTOCOLS
This functionality affects ftp only
EXAMPLE
#include <stdio.h>
struct callback_data {
FILE *output;
};
static long file_is_coming(struct curl_fileinfo *finfo,
void *ptr,
int remains)
{
struct callback_data *data = ptr;
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;
CURL *curl = curl_easy_init();
/* 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);
}
AVAILABILITY
Added in curl 7.21.0
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
SEE ALSO
CURLOPT_CHUNK_BGN_FUNCTION(3), CURLOPT_WILDCARDMATCH(3)
libcurl 2024-08-05 CURLOPT_CHUNK_DATA(3)
curl 8.9.1 - Generated Wed Aug 7 11:23:47 CDT 2024