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NAMECURLOPT_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); DESCRIPTIONHSTS (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 then automatically redirects 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
DEFAULT0 PROTOCOLSThis functionality affects http only EXAMPLEint main(void) { AVAILABILITYAdded in curl 7.74.0 RETURN VALUEcurl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSOCURLOPT_ALTSVC(3), CURLOPT_CONNECT_TO(3), CURLOPT_HSTS(3), CURLOPT_RESOLVE(3)
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