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tool_operate: support --dump-header % to direct to stderr

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Similar to how --trace and --trace-ascii already do it.

Added test 1489 to verify

Closes #13992
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Daniel Stenberg 2024-08-04 16:01:41 +02:00
parent e26eefd9ce
commit 9b1e4b4632
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7
docs/cmdline-opts/dump-header.md
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@ -19,8 +19,11 @@ Example:
# `--dump-header`
Write the received protocol headers to the specified file. If no headers are
received, the use of this option creates an empty file. Specify `-` as file
name (a single minus) to have it written to stdout.
received, the use of this option creates an empty file. Specify `-` as
filename (a single minus) to have it written to stdout.
Starting in curl 8.10.0, specify `%` (a single percent sign) as filename
writes the output to stderr.
When used in FTP, the FTP server response lines are considered being "headers"
and thus are saved there.