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After this patch `://` schemes are lowercase and enclosed in backticks. Also: - docs/libcurl/libcurl-multi.md: drop a stray C code fence. - docs/libcurl/libcurl-tutorial.md: replace single/double quotes with Markdown markup where applicable. Ref: #21646 Closes #21674
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| c | SPDX-License-Identifier | Long | Arg | Protocols | Help | Added | Category | Multi | See-also | Example | ||
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| Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. | curl | hsts | <filename> | HTTPS | Enable HSTS with this cache file | 7.74.0 | http | append |
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--hsts
Enable HSTS for the transfer. If the filename points to an existing HSTS cache file, that is used. After a completed transfer, the cache is saved to the filename again if it has been modified.
If curl is told to use http:// for a transfer involving a hostname that
exists in the HSTS cache, it upgrades the transfer to use HTTPS. Each HSTS
cache entry has an individual lifetime after which the upgrade is no longer
performed.
Specify a "" filename (zero length) to avoid loading/saving and make curl handle HSTS in memory.
You may want to restrict your umask to prevent other users on the same system to access the created file.
If this option is used several times, curl loads contents from all the files but the last one is used for saving.
Since curl 8.20.0, curl keeps no more than the most recently added 10,000 unique HSTS hostnames.