CURLOPT_HSTSREADFUNCTION - read callback for HSTS hosts
#include <curl/curl.h>
struct curl_hstsentry {
char *name;
size_t namelen;
unsigned int includeSubDomains:1;
char expire[18]; /* YYYYMMDD HH:MM:SS [null-terminated] */
};
CURLSTScode hstsread(CURL *easy, struct curl_hstsentry *sts, void *clientp);
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTSREADFUNCTION, hstsread);
Pass a pointer to your callback function, as the prototype shows above.
This callback function gets called by libcurl repeatedly when it populates the
in-memory HSTS cache.
Set the
clientp argument with the
CURLOPT_HSTSREADDATA(3) option
or it will be NULL.
When this callback is invoked, the
sts pointer points to a populated
struct: Copy the host name to
name (no longer than
namelen
bytes). Make it null-terminated. Set
includeSubDomains to TRUE or
FALSE. Set
expire to a date stamp or a zero length string for *forever*
(wrong date stamp format might cause the name to not get accepted)
The callback should return
CURLSTS_OK if it returns a name and is
prepared to be called again (for another host) or
CURLSTS_DONE if it
has no entry to return. It can also return
CURLSTS_FAIL to signal
error. Returning
CURLSTS_FAIL will stop the transfer from being
performed and make
CURLE_ABORTED_BY_CALLBACK get returned.
This option does not enable HSTS, you need to use
CURLOPT_HSTS_CTRL(3) to
do that.
NULL - no callback.
This feature is only used for HTTP(S) transfer.
{
/* set HSTS read callback */
curl_easy_setopt(curl, CURLOPT_HSTSREADFUNCTION, hstsread);
/* pass in suitable argument to the callback */
curl_easy_setopt(curl, CURLOPT_HSTSREADDATA, &hstspreload[0]);
result = curl_easy_perform(curl);
}
Added in 7.74.0
This will return CURLE_OK.
CURLOPT_HSTSREADDATA(3),
CURLOPT_HSTSWRITEFUNCTION(3),
CURLOPT_HSTS(3),
CURLOPT_HSTS_CTRL(3),