3631c24861
- Better explain that if the requested range (--range or CURLOPT_RANGE) contains multiple ranges then the response contains meta information in addition to the requested bytes. Prior to this change it was noted that a multiple part response was returned as-is but not what that meant. In particular, meta information is returned in addition to the requested bytes and that may have been unexpected. Reported-by: Ralf A. Timmermann Fixes https://github.com/curl/curl/issues/16139 Closes https://github.com/curl/curl/pull/16150
62 lines
1.7 KiB
Markdown
62 lines
1.7 KiB
Markdown
---
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
SPDX-License-Identifier: curl
|
|
Long: range
|
|
Short: r
|
|
Help: Retrieve only the bytes within RANGE
|
|
Arg: <range>
|
|
Protocols: HTTP FTP SFTP FILE
|
|
Category: http ftp sftp file
|
|
Added: 4.0
|
|
Multi: single
|
|
See-also:
|
|
- continue-at
|
|
- append
|
|
Example:
|
|
- --range 22-44 $URL
|
|
---
|
|
|
|
# `--range`
|
|
|
|
Retrieve a byte range (i.e. a partial document) from an HTTP/1.1, FTP or SFTP
|
|
server or a local FILE. Ranges can be specified in a number of ways.
|
|
|
|
## 0-499
|
|
specifies the first 500 bytes
|
|
|
|
## 500-999
|
|
specifies the second 500 bytes
|
|
|
|
## -500
|
|
specifies the last 500 bytes
|
|
|
|
## 9500-
|
|
specifies the bytes from offset 9500 and forward
|
|
|
|
## 0-0,-1
|
|
specifies the first and last byte only(*)(HTTP)
|
|
|
|
## 100-199,500-599
|
|
specifies two separate 100-byte ranges(*) (HTTP)
|
|
|
|
##
|
|
|
|
(*) = NOTE that if specifying multiple ranges and the server supports it then
|
|
it replies with a multiple part response that curl returns as-is. It
|
|
contains meta information in addition to the requested bytes. Parsing or
|
|
otherwise transforming this response is the responsibility of the caller.
|
|
|
|
Only digit characters (0-9) are valid in the 'start' and 'stop' fields of the
|
|
'start-stop' range syntax. If a non-digit character is given in the range, the
|
|
server's response is unspecified, depending on the server's configuration.
|
|
|
|
Many HTTP/1.1 servers do not have this feature enabled, so that when you
|
|
attempt to get a range, curl instead gets the whole document.
|
|
|
|
FTP and SFTP range downloads only support the simple 'start-stop' syntax
|
|
(optionally with one of the numbers omitted). FTP use depends on the extended
|
|
FTP command SIZE.
|
|
|
|
This command line option is mutually exclusive with --continue-at: you can only
|
|
use one of them for a single transfer.
|