mirror of
https://github.com/curl/curl.git
synced 2024-12-09 06:30:06 +08:00
83 lines
2.8 KiB
Groff
83 lines
2.8 KiB
Groff
.\" **************************************************************************
|
|
.\" * _ _ ____ _
|
|
.\" * Project ___| | | | _ \| |
|
|
.\" * / __| | | | |_) | |
|
|
.\" * | (__| |_| | _ <| |___
|
|
.\" * \___|\___/|_| \_\_____|
|
|
.\" *
|
|
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
.\" *
|
|
.\" * This software is licensed as described in the file COPYING, which
|
|
.\" * you should have received as part of this distribution. The terms
|
|
.\" * are also available at https://curl.se/docs/copyright.html.
|
|
.\" *
|
|
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
.\" * copies of the Software, and permit persons to whom the Software is
|
|
.\" * furnished to do so, under the terms of the COPYING file.
|
|
.\" *
|
|
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
.\" * KIND, either express or implied.
|
|
.\" *
|
|
.\" * SPDX-License-Identifier: curl
|
|
.\" *
|
|
.\" **************************************************************************
|
|
.\"
|
|
.TH CURLOPT_UPLOAD_BUFFERSIZE 3 "18 Aug 2018" libcurl libcurl
|
|
.SH NAME
|
|
CURLOPT_UPLOAD_BUFFERSIZE \- upload buffer size
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <curl/curl.h>
|
|
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_UPLOAD_BUFFERSIZE, long size);
|
|
.fi
|
|
.SH DESCRIPTION
|
|
Pass a long specifying your preferred \fIsize\fP (in bytes) for the upload
|
|
buffer in libcurl. It makes libcurl uses a larger buffer that gets passed to
|
|
the next layer in the stack to get sent off. In some setups and for some
|
|
protocols, there is a huge performance benefit of having a larger upload
|
|
buffer.
|
|
|
|
This is just treated as a request, not an order. You cannot be guaranteed to
|
|
actually get the given size.
|
|
|
|
The upload buffer size is by default 64 kilobytes. The maximum buffer size
|
|
allowed to be set is 2 megabytes. The minimum buffer size allowed to be set is
|
|
16 kilobytes.
|
|
|
|
The upload buffer is allocated on-demand - so if the handle is not used for
|
|
upload, this buffer is not allocated at all.
|
|
|
|
DO NOT set this option on a handle that is currently used for an active
|
|
transfer as that may lead to unintended consequences.
|
|
.SH DEFAULT
|
|
65536 bytes
|
|
.SH PROTOCOLS
|
|
All
|
|
.SH EXAMPLE
|
|
.nf
|
|
int main(void)
|
|
{
|
|
CURL *curl = curl_easy_init();
|
|
if(curl) {
|
|
CURLcode res;
|
|
curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/foo.bin");
|
|
|
|
/* ask libcurl to allocate a larger upload buffer */
|
|
curl_easy_setopt(curl, CURLOPT_UPLOAD_BUFFERSIZE, 120000L);
|
|
|
|
res = curl_easy_perform(curl);
|
|
|
|
curl_easy_cleanup(curl);
|
|
}
|
|
}
|
|
.fi
|
|
.SH AVAILABILITY
|
|
Added in 7.62.0.
|
|
.SH RETURN VALUE
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|
|
.SH "SEE ALSO"
|
|
.BR CURLOPT_BUFFERSIZE (3),
|
|
.BR CURLOPT_READFUNCTION (3),
|
|
.BR CURLOPT_TCP_NODELAY (3)
|