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curl/docs/cmdline-opts/hsts.d

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+Long: hsts
+Arg: <file name>
+Protocols: HTTPS
+Help: Enable HSTS with this cache file
+Added: 7.74.0
+Category: http
+---
+WARNING: this option is experimental. Do not use in production.
+
+This option enables HSTS for the transfer. If the file name points to an
+existing HSTS cache file, that will be used. After a completed transfer, the
+cache will be saved to the file name again if it has been modified.
+
+Specify a "" file name (zero length) to avoid loading/saving and make curl
+just handle HSTS in memory.
+
+If this option is used several times, curl will load contents from all the
+files but the last one will be used for saving.