51 lines
1.5 KiB
D
51 lines
1.5 KiB
D
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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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Long: range
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Short: r
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Help: Retrieve only the bytes within RANGE
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Arg: <range>
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Protocols: HTTP FTP SFTP FILE
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Category: http ftp sftp file
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Example: --range 22-44 $URL
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Added: 4.0
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See-also: continue-at append
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Multi: single
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---
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Retrieve a byte range (i.e. a partial document) from an HTTP/1.1, FTP or SFTP
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server or a local FILE. Ranges can be specified in a number of ways.
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.RS
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.TP 10
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.B 0-499
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specifies the first 500 bytes
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.TP
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.B 500-999
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specifies the second 500 bytes
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.TP
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.B -500
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specifies the last 500 bytes
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.TP
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.B 9500-
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specifies the bytes from offset 9500 and forward
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.TP
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.B 0-0,-1
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specifies the first and last byte only(*)(HTTP)
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.TP
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.B 100-199,500-599
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specifies two separate 100-byte ranges(*) (HTTP)
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.RE
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.IP
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(*) = NOTE that this causes the server to reply with a multipart response,
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which is returned as-is by curl! Parsing or otherwise transforming this
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response is the responsibility of the caller.
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Only digit characters (0-9) are valid in the 'start' and 'stop' fields of the
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'start-stop' range syntax. If a non-digit character is given in the range, the
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server's response is unspecified, depending on the server's configuration.
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Many HTTP/1.1 servers do not have this feature enabled, so that when you
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attempt to get a range, curl instead gets the whole document.
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FTP and SFTP range downloads only support the simple 'start-stop' syntax
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(optionally with one of the numbers omitted). FTP use depends on the extended
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FTP command SIZE.
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