1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Long: range 5Short: r 6Help: Retrieve only the bytes within RANGE 7Arg: <range> 8Protocols: HTTP FTP SFTP FILE 9Category: http ftp sftp file 10Added: 4.0 11Multi: single 12See-also: 13 - continue-at 14 - append 15Example: 16 - --range 22-44 $URL 17--- 18 19# `--range` 20 21Retrieve a byte range (i.e. a partial document) from an HTTP/1.1, FTP or SFTP 22server or a local FILE. Ranges can be specified in a number of ways. 23 24## 0-499 25specifies the first 500 bytes 26 27## 500-999 28specifies the second 500 bytes 29 30## -500 31specifies the last 500 bytes 32 33## 9500- 34specifies the bytes from offset 9500 and forward 35 36## 0-0,-1 37specifies the first and last byte only(*)(HTTP) 38 39## 100-199,500-599 40specifies two separate 100-byte ranges(*) (HTTP) 41 42## 43 44(*) = NOTE that these make the server reply with a multipart response, which 45is returned as-is by curl! Parsing or otherwise transforming this response is 46the responsibility of the caller. 47 48Only digit characters (0-9) are valid in the 'start' and 'stop' fields of the 49'start-stop' range syntax. If a non-digit character is given in the range, the 50server's response is unspecified, depending on the server's configuration. 51 52Many HTTP/1.1 servers do not have this feature enabled, so that when you 53attempt to get a range, curl instead gets the whole document. 54 55FTP and SFTP range downloads only support the simple 'start-stop' syntax 56(optionally with one of the numbers omitted). FTP use depends on the extended 57FTP command SIZE. 58
