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CURLOPT_HSTS_CTRL(3) curl_easy_setopt options CURLOPT_HSTS_CTRL(3) NAME CURLOPT_HSTS_CTRL - control HSTS behavior SYNOPSIS #include <curl/curl.h> #define CURLHSTS_ENABLE (1<<0) #define CURLHSTS_READONLYFILE (1<<1) CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTS_CTRL, long bitmask); DESCRIPTION HSTS (HTTP Strict Transport Security) means that an HTTPS server can instruct the client to not contact it again over clear-text HTTP for a certain period into the future. libcurl will then automatically redi- rect HTTP attempts to such hosts to instead use HTTPS. This is done by libcurl retaining this knowledge in an in-memory cache. Populate the long bitmask with the correct set of features to instruct libcurl how to handle HSTS for the transfers using this handle. BITS CURLHSTS_ENABLE Enable the in-memory HSTS cache for this handle. CURLHSTS_READONLYFILE Make the HSTS file (if specified) read-only - makes libcurl not save the cache to the file when closing the handle. DEFAULT 0. HSTS is disabled by default. PROTOCOLS HTTPS and HTTP EXAMPLE CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_HSTS_CTRL, CURLHSTS_ENABLE); curl_easy_perform(curl); } AVAILABILITY Added in 7.74.0 RETURN VALUE Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. SEE ALSO CURLOPT_HSTS(3), CURLOPT_CONNECT_TO(3), CURLOPT_RESOLVE(3), CUR- LOPT_ALTSVC(3), libcurl 7.82.0 September 06, 2021 CURLOPT_HSTS_CTRL(3)
NAME | SYNOPSIS | DESCRIPTION | BITS | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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