33 lines
956 B
Markdown
33 lines
956 B
Markdown
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---
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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: hsts
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Arg: <file name>
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Protocols: HTTPS
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Help: Enable HSTS with this cache file
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Added: 7.74.0
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Category: http
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Multi: append
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See-also:
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- proto
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Example:
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- --hsts cache.txt $URL
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---
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# `--hsts`
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This option enables HSTS for the transfer. If the file name points to an
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existing HSTS cache file, that is used. After a completed transfer, the
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cache is saved to the file name again if it has been modified.
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If curl is told to use HTTP:// for a transfer involving a host name that
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exists in the HSTS cache, it upgrades the transfer to use HTTPS. Each HSTS
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cache entry has an individual life time after which the upgrade is no longer
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performed.
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Specify a "" file name (zero length) to avoid loading/saving and make curl
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just handle HSTS in memory.
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If this option is used several times, curl loads contents from all the
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files but the last one is used for saving.
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