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Some CURLOPT constants defined in the curl public headers were initially enums (= ints), or macros with bare numeric values. Recent curl releases upgraded them to `long` constants, to make them pass correctly to `curl_easy_setop()` by default, i.e. without requiring a `(long)` cast. This patch drops such casts from the examples embedded in the docs. At the same time it documents which curl release made them `long` types, to keep them useful when working with previous libcurl versions. Also: - drop a `(long)` cast that was never necessary. - CURLOPT_ALTSVC_CTRL.md: bump local copy of macros to long. - test1119: make it ignore symbols ending with an underscore, to skip wildcard, e.g. `**CURLAUTH_***`. Closes #18130
80 lines
1.6 KiB
Markdown
80 lines
1.6 KiB
Markdown
---
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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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Title: CURLOPT_HSTS_CTRL
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Section: 3
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Source: libcurl
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Protocol:
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- HTTP
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See-also:
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- CURLOPT_ALTSVC (3)
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- CURLOPT_CONNECT_TO (3)
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- CURLOPT_HSTS (3)
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- CURLOPT_RESOLVE (3)
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Added-in: 7.74.0
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---
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# NAME
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CURLOPT_HSTS_CTRL - control HSTS behavior
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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#define CURLHSTS_ENABLE (1L<<0)
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#define CURLHSTS_READONLYFILE (1L<<1)
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTS_CTRL, long bitmask);
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~~~
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# 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 *bitmask* 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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# BITS
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## CURLHSTS_ENABLE
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Enable the in-memory HSTS cache for this handle.
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## 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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# DEFAULT
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0
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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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, CURLHSTS_ENABLE);
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curl_easy_perform(curl);
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}
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}
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~~~
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# %AVAILABILITY%
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# RETURN VALUE
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curl_easy_setopt(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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