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---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_CHUNK_END_FUNCTION
Section: 3
Source: libcurl
See-also:
- CURLOPT_CHUNK_BGN_FUNCTION (3)
- CURLOPT_WILDCARDMATCH (3)
---
# NAME
CURLOPT_CHUNK_END_FUNCTION - callback after a transfer with FTP wildcard match
# SYNOPSIS
~~~c
#include <curl/curl.h>
long chunk_end_callback(void *ptr);
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CHUNK_END_FUNCTION,
chunk_end_callback);
~~~
# DESCRIPTION
Pass a pointer to your callback function, which should match the prototype
shown above.
This function gets called by libcurl as soon as a part of the stream has been
transferred (or skipped).
Return *CURL_CHUNK_END_FUNC_OK* if everything is fine or
**CURL_CHUNK_END_FUNC_FAIL** to tell the lib to stop if some error occurred.
# DEFAULT
NULL
# PROTOCOLS
FTP
# EXAMPLE
~~~c
#include <stdio.h>
struct callback_data {
FILE *output;
};
static long file_is_downloaded(struct callback_data *data)
{
if(data->output) {
fclose(data->output);
data->output = 0x0;
}
return CURL_CHUNK_END_FUNC_OK;
}
int main()
{
/* data for callback */
struct callback_data callback_info;
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_CHUNK_END_FUNCTION, file_is_downloaded);
curl_easy_setopt(curl, CURLOPT_CHUNK_DATA, &callback_info);
}
~~~
# AVAILABILITY
Added in 7.21.0
# RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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