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CURLOPT_AUTOREFERER(3)	   Library Functions Manual	CURLOPT_AUTOREFERER(3)

NAME
       CURLOPT_AUTOREFERER - automatically update the referer header

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	curl_easy_setopt(CURL *handle, CURLOPT_AUTOREFERER, long autorefer);

DESCRIPTION
       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 redi-
       rects are done cross-origin or following	redirects to  insecure	proto-
       cols. This is considered	a minor	privacy	leak by	some.

       With  CURLINFO_REFERER(3),  applications	 can extract the actually used
       referer header after the	transfer.

DEFAULT
       0, disabled

PROTOCOLS
       This functionality affects http only

EXAMPLE
       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);
	 }
       }

AVAILABILITY
       Added in	curl 7.1

RETURN VALUE
       curl_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 ALSO
       CURLINFO_EFFECTIVE_URL(3),   CURLINFO_REDIRECT_URL(3),	 CURLINFO_REF-
       ERER(3),	CURLOPT_FOLLOWLOCATION(3), CURLOPT_REFERER(3)

libcurl				  2025-06-03		CURLOPT_AUTOREFERER(3)

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