85 lines
2 KiB
Markdown
85 lines
2 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_RANGE
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_LOW_SPEED_LIMIT (3)
|
||
|
|
- CURLOPT_MAXFILESIZE_LARGE (3)
|
||
|
|
- CURLOPT_MAX_RECV_SPEED_LARGE (3)
|
||
|
|
- CURLOPT_RESUME_FROM (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_RANGE - byte range to request
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#include <curl/curl.h>
|
||
|
|
|
||
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RANGE, char *range);
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# DESCRIPTION
|
||
|
|
|
||
|
|
Pass a char pointer as parameter, which should contain the specified range you
|
||
|
|
want to retrieve. It should be in the format "X-Y", where either X or Y may be
|
||
|
|
left out and X and Y are byte indexes.
|
||
|
|
|
||
|
|
HTTP transfers also support several intervals, separated with commas as in
|
||
|
|
*"X-Y,N-M"*. Using this kind of multiple intervals causes the HTTP server
|
||
|
|
to send the response document in pieces (using standard MIME separation
|
||
|
|
techniques). Unfortunately, the HTTP standard (RFC 7233 section 3.1) allows
|
||
|
|
servers to ignore range requests so even when you set CURLOPT_RANGE(3)
|
||
|
|
for a request, you may end up getting the full response sent back.
|
||
|
|
|
||
|
|
For RTSP, the formatting of a range should follow RFC 2326 Section 12.29. For
|
||
|
|
RTSP, byte ranges are **not** permitted. Instead, ranges should be given in
|
||
|
|
**npt**, **utc**, or **smpte** formats.
|
||
|
|
|
||
|
|
For HTTP PUT uploads this option should not be used, since it may conflict with
|
||
|
|
other options.
|
||
|
|
|
||
|
|
Pass a NULL to this option to disable the use of ranges.
|
||
|
|
|
||
|
|
The application does not have to keep the string around after setting this
|
||
|
|
option.
|
||
|
|
|
||
|
|
# DEFAULT
|
||
|
|
|
||
|
|
NULL
|
||
|
|
|
||
|
|
# PROTOCOLS
|
||
|
|
|
||
|
|
HTTP, FTP, FILE, RTSP and SFTP.
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
CURL *curl = curl_easy_init();
|
||
|
|
if(curl) {
|
||
|
|
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
|
||
|
|
|
||
|
|
/* get the first 200 bytes */
|
||
|
|
curl_easy_setopt(curl, CURLOPT_RANGE, "0-199");
|
||
|
|
|
||
|
|
/* Perform the request */
|
||
|
|
curl_easy_perform(curl);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# AVAILABILITY
|
||
|
|
|
||
|
|
FILE since 7.18.0, RTSP since 7.20.0
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK on success or
|
||
|
|
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
|