103 lines
1.9 KiB
Markdown
103 lines
1.9 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_CHUNK_DATA
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_CHUNK_BGN_FUNCTION (3)
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- CURLOPT_WILDCARDMATCH (3)
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---
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# NAME
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CURLOPT_CHUNK_DATA - pointer passed to the FTP chunk callbacks
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CHUNK_DATA, void *pointer);
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~~~
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# DESCRIPTION
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Pass a *pointer* that is untouched by libcurl and passed as the ptr
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argument to the CURLOPT_CHUNK_BGN_FUNCTION(3) and
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CURLOPT_CHUNK_END_FUNCTION(3).
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# DEFAULT
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NULL
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# PROTOCOLS
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FTP
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# EXAMPLE
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~~~c
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#include <stdio.h>
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struct callback_data {
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FILE *output;
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};
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static long file_is_coming(struct curl_fileinfo *finfo,
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void *ptr,
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int remains)
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{
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struct callback_data *data = ptr;
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printf("%3d %40s %10luB ", remains, finfo->filename,
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(unsigned long)finfo->size);
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switch(finfo->filetype) {
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case CURLFILETYPE_DIRECTORY:
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printf(" DIR\n");
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break;
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case CURLFILETYPE_FILE:
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printf("FILE ");
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break;
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default:
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printf("OTHER\n");
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break;
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}
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if(finfo->filetype == CURLFILETYPE_FILE) {
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/* do not transfer files >= 50B */
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if(finfo->size > 50) {
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printf("SKIPPED\n");
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return CURL_CHUNK_BGN_FUNC_SKIP;
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}
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data->output = fopen(finfo->filename, "wb");
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if(!data->output) {
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return CURL_CHUNK_BGN_FUNC_FAIL;
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}
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}
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return CURL_CHUNK_BGN_FUNC_OK;
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}
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int main()
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{
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/* data for callback */
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struct callback_data callback_info;
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CURL *curl = curl_easy_init();
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/* callback is called before download of concrete file started */
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curl_easy_setopt(curl, CURLOPT_CHUNK_BGN_FUNCTION, file_is_coming);
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curl_easy_setopt(curl, CURLOPT_CHUNK_DATA, &callback_info);
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}
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~~~
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# AVAILABILITY
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Added in 7.21.0
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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