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53 lines
1.5 KiB
Groff
53 lines
1.5 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLOPT_HSTS_CTRL.md
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.TH CURLOPT_HSTS_CTRL 3 "2024-06-01" libcurl
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.SH NAME
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CURLOPT_HSTS_CTRL \- control HSTS behavior
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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#define CURLHSTS_ENABLE (1<<0)
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#define CURLHSTS_READONLYFILE (1<<1)
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTS_CTRL, long bitmask);
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.fi
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.SH DESCRIPTION
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HSTS (HTTP Strict Transport Security) means that an HTTPS server can instruct
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the client to not contact it again over clear\-text HTTP for a certain period
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into the future. libcurl then automatically redirects HTTP attempts to such
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hosts to instead use HTTPS. This is done by libcurl retaining this knowledge
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in an in\-memory cache.
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Populate the long \fIbitmask\fP with the correct set of features to instruct
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libcurl how to handle HSTS for the transfers using this handle.
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.SH BITS
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.IP CURLHSTS_ENABLE
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Enable the in\-memory HSTS cache for this handle.
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.IP CURLHSTS_READONLYFILE
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Make the HSTS file (if specified) read\-only \- makes libcurl not save the cache
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to the file when closing the handle.
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.SH DEFAULT
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0. HSTS is disabled by default.
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.SH PROTOCOLS
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HTTP
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.SH EXAMPLE
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.nf
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_HSTS_CTRL, (long)CURLHSTS_ENABLE);
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curl_easy_perform(curl);
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}
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}
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.fi
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.SH AVAILABILITY
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Added in 7.74.0
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH SEE ALSO
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.BR CURLOPT_ALTSVC (3),
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.BR CURLOPT_CONNECT_TO (3),
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.BR CURLOPT_HSTS (3),
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.BR CURLOPT_RESOLVE (3)
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