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
2024-09-18 | libcurl |