CURLOPT_AUTOREFERER − automatically update the referer header
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AUTOREFERER, long autorefer);
Pass a long parameter set to 1 to enable this. When enabled, libcurl automatically sets the Referer: header field in HTTP requests to the full URL when it follows a Location: redirect to a new destination.
The automatic referer is set to the full previous URL even when redirects are done cross-origin or following redirects to insecure protocols. This is considered a minor privacy leak by some.
0, disabled
HTTP
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL,
"https://example.com/foo.bin");
/* follow
redirects */
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
/* set Referer:
automatically when following redirects */
curl_easy_setopt(curl, CURLOPT_AUTOREFERER, 1L);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
Along with HTTP
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
CURLINFO_EFFECTIVE_URL(3), CURLINFO_REDIRECT_URL(3), CURLOPT_FOLLOWLOCATION(3), CURLOPT_REFERER(3)